Merge "ObjPtr<>-ify UnstartedRuntime, fix 2 stale reference uses."
diff --git a/compiler/debug/elf_debug_info_writer.h b/compiler/debug/elf_debug_info_writer.h
index 893cad2..87e679f 100644
--- a/compiler/debug/elf_debug_info_writer.h
+++ b/compiler/debug/elf_debug_info_writer.h
@@ -207,11 +207,10 @@
       std::vector<DexRegisterMap> dex_reg_maps;
       if (accessor.HasCodeItem() && mi->code_info != nullptr) {
         const CodeInfo code_info(mi->code_info);
-        CodeInfoEncoding encoding = code_info.ExtractEncoding();
-        for (size_t s = 0; s < code_info.GetNumberOfStackMaps(encoding); ++s) {
-          const StackMap& stack_map = code_info.GetStackMapAt(s, encoding);
+        for (size_t s = 0; s < code_info.GetNumberOfStackMaps(); ++s) {
+          const StackMap stack_map = code_info.GetStackMapAt(s);
           dex_reg_maps.push_back(code_info.GetDexRegisterMapOf(
-              stack_map, encoding, accessor.RegistersSize()));
+              stack_map, accessor.RegistersSize()));
         }
       }
 
diff --git a/compiler/debug/elf_debug_line_writer.h b/compiler/debug/elf_debug_line_writer.h
index 44504c1..a7adab5 100644
--- a/compiler/debug/elf_debug_line_writer.h
+++ b/compiler/debug/elf_debug_line_writer.h
@@ -100,15 +100,14 @@
       if (mi->code_info != nullptr) {
         // Use stack maps to create mapping table from pc to dex.
         const CodeInfo code_info(mi->code_info);
-        const CodeInfoEncoding encoding = code_info.ExtractEncoding();
-        pc2dex_map.reserve(code_info.GetNumberOfStackMaps(encoding));
-        for (uint32_t s = 0; s < code_info.GetNumberOfStackMaps(encoding); s++) {
-          StackMap stack_map = code_info.GetStackMapAt(s, encoding);
+        pc2dex_map.reserve(code_info.GetNumberOfStackMaps());
+        for (uint32_t s = 0; s < code_info.GetNumberOfStackMaps(); s++) {
+          StackMap stack_map = code_info.GetStackMapAt(s);
           DCHECK(stack_map.IsValid());
-          const uint32_t pc = stack_map.GetNativePcOffset(encoding.stack_map.encoding, isa);
-          const int32_t dex = stack_map.GetDexPc(encoding.stack_map.encoding);
+          const uint32_t pc = stack_map.GetNativePcOffset(isa);
+          const int32_t dex = stack_map.GetDexPc();
           pc2dex_map.push_back({pc, dex});
-          if (stack_map.HasDexRegisterMap(encoding.stack_map.encoding)) {
+          if (stack_map.HasDexRegisterMap()) {
             // Guess that the first map with local variables is the end of prologue.
             prologue_end = std::min(prologue_end, pc);
           }
diff --git a/compiler/debug/elf_debug_loc_writer.h b/compiler/debug/elf_debug_loc_writer.h
index 9ea9f01..c1bf915 100644
--- a/compiler/debug/elf_debug_loc_writer.h
+++ b/compiler/debug/elf_debug_loc_writer.h
@@ -99,12 +99,11 @@
   // Get stack maps sorted by pc (they might not be sorted internally).
   // TODO(dsrbecky) Remove this once stackmaps get sorted by pc.
   const CodeInfo code_info(method_info->code_info);
-  const CodeInfoEncoding encoding = code_info.ExtractEncoding();
   std::map<uint32_t, uint32_t> stack_maps;  // low_pc -> stack_map_index.
-  for (uint32_t s = 0; s < code_info.GetNumberOfStackMaps(encoding); s++) {
-    StackMap stack_map = code_info.GetStackMapAt(s, encoding);
+  for (uint32_t s = 0; s < code_info.GetNumberOfStackMaps(); s++) {
+    StackMap stack_map = code_info.GetStackMapAt(s);
     DCHECK(stack_map.IsValid());
-    if (!stack_map.HasDexRegisterMap(encoding.stack_map.encoding)) {
+    if (!stack_map.HasDexRegisterMap()) {
       // The compiler creates stackmaps without register maps at the start of
       // basic blocks in order to keep instruction-accurate line number mapping.
       // However, we never stop at those (breakpoint locations always have map).
@@ -112,7 +111,7 @@
       // The main reason for this is to save space by avoiding undefined gaps.
       continue;
     }
-    const uint32_t pc_offset = stack_map.GetNativePcOffset(encoding.stack_map.encoding, isa);
+    const uint32_t pc_offset = stack_map.GetNativePcOffset(isa);
     DCHECK_LE(pc_offset, method_info->code_size);
     DCHECK_LE(compilation_unit_code_address, method_info->code_address);
     const uint32_t low_pc = dchecked_integral_cast<uint32_t>(
@@ -124,7 +123,7 @@
   for (auto it = stack_maps.begin(); it != stack_maps.end(); it++) {
     const uint32_t low_pc = it->first;
     const uint32_t stack_map_index = it->second;
-    const StackMap& stack_map = code_info.GetStackMapAt(stack_map_index, encoding);
+    const StackMap stack_map = code_info.GetStackMapAt(stack_map_index);
     auto next_it = it;
     next_it++;
     const uint32_t high_pc = next_it != stack_maps.end()
@@ -136,7 +135,7 @@
     }
 
     // Check that the stack map is in the requested range.
-    uint32_t dex_pc = stack_map.GetDexPc(encoding.stack_map.encoding);
+    uint32_t dex_pc = stack_map.GetDexPc();
     if (!(dex_pc_low <= dex_pc && dex_pc < dex_pc_high)) {
       // The variable is not in scope at this PC. Therefore omit the entry.
       // Note that this is different to None() entry which means in scope, but unknown location.
@@ -151,10 +150,10 @@
     DCHECK(dex_register_map.IsValid());
     CodeItemDataAccessor accessor(*method_info->dex_file, method_info->code_item);
     reg_lo = dex_register_map.GetDexRegisterLocation(
-        vreg, accessor.RegistersSize(), code_info, encoding);
+        vreg, accessor.RegistersSize(), code_info);
     if (is64bitValue) {
       reg_hi = dex_register_map.GetDexRegisterLocation(
-          vreg + 1, accessor.RegistersSize(), code_info, encoding);
+          vreg + 1, accessor.RegistersSize(), code_info);
     }
 
     // Add location entry for this address range.
diff --git a/compiler/dex/dex_to_dex_decompiler_test.cc b/compiler/dex/dex_to_dex_decompiler_test.cc
index 19b1900..082e609 100644
--- a/compiler/dex/dex_to_dex_decompiler_test.cc
+++ b/compiler/dex/dex_to_dex_decompiler_test.cc
@@ -20,6 +20,7 @@
 #include "common_compiler_test.h"
 #include "compiled_method-inl.h"
 #include "compiler_callbacks.h"
+#include "dex/class_accessor-inl.h"
 #include "dex/dex_file.h"
 #include "driver/compiler_driver.h"
 #include "driver/compiler_options.h"
@@ -82,30 +83,21 @@
 
     // Unquicken the dex file.
     for (uint32_t i = 0; i < updated_dex_file->NumClassDefs(); ++i) {
-      const DexFile::ClassDef& class_def = updated_dex_file->GetClassDef(i);
-      const uint8_t* class_data = updated_dex_file->GetClassData(class_def);
-      if (class_data == nullptr) {
-        continue;
-      }
-      ClassDataItemIterator it(*updated_dex_file, class_data);
-      it.SkipAllFields();
-
       // Unquicken each method.
-      while (it.HasNextMethod()) {
-        uint32_t method_idx = it.GetMemberIndex();
-        CompiledMethod* compiled_method =
-            compiler_driver_->GetCompiledMethod(MethodReference(updated_dex_file, method_idx));
+      ClassAccessor accessor(*updated_dex_file, updated_dex_file->GetClassDef(i));
+      accessor.VisitMethods([&](const ClassAccessor::Method& method) {
+        CompiledMethod* compiled_method = compiler_driver_->GetCompiledMethod(
+            MethodReference(updated_dex_file,
+                            method.GetIndex()));
         ArrayRef<const uint8_t> table;
         if (compiled_method != nullptr) {
           table = compiled_method->GetVmapTable();
         }
         optimizer::ArtDecompileDEX(*updated_dex_file,
-                                   *it.GetMethodCodeItem(),
+                                   *accessor.GetCodeItem(method),
                                    table,
                                    /* decompile_return_instruction */ true);
-        it.Next();
-      }
-      DCHECK(!it.HasNext());
+      });
     }
 
     // Make sure after unquickening we go back to the same contents as the original dex file.
diff --git a/compiler/driver/compiler_driver.cc b/compiler/driver/compiler_driver.cc
index 39ed825..7dc44fa 100644
--- a/compiler/driver/compiler_driver.cc
+++ b/compiler/driver/compiler_driver.cc
@@ -2160,6 +2160,9 @@
         DCHECK(failure_kind == verifier::FailureKind::kNoFailure) << failure_kind;
         failure_kind = verifier::FailureKind::kSoftFailure;
       }
+    } else if (&klass->GetDexFile() != &dex_file) {
+      // Skip a duplicate class (as the resolved class is from another, earlier dex file).
+      return;  // Do not update state.
     } else if (!SkipClass(jclass_loader, dex_file, klass.Get())) {
       CHECK(klass->IsResolved()) << klass->PrettyClass();
       failure_kind = class_linker->VerifyClass(soa.Self(), klass, log_level_);
@@ -2804,6 +2807,9 @@
       dex_cache = hs.NewHandle(class_linker->FindDexCache(soa.Self(), dex_file));
     } else if (SkipClass(jclass_loader, dex_file, klass.Get())) {
       return;
+    } else if (&klass->GetDexFile() != &dex_file) {
+      // Skip a duplicate class (as the resolved class is from another, earlier dex file).
+      return;  // Do not update state.
     } else {
       dex_cache = hs.NewHandle(klass->GetDexCache());
     }
diff --git a/compiler/optimizing/code_generator.cc b/compiler/optimizing/code_generator.cc
index fb556f4..de1be5b 100644
--- a/compiler/optimizing/code_generator.cc
+++ b/compiler/optimizing/code_generator.cc
@@ -975,11 +975,10 @@
                         const CodeInfo& code_info,
                         const ArenaVector<HSuspendCheck*>& loop_headers,
                         ArenaVector<size_t>* covered) {
-  CodeInfoEncoding encoding = code_info.ExtractEncoding();
   for (size_t i = 0; i < loop_headers.size(); ++i) {
     if (loop_headers[i]->GetDexPc() == dex_pc) {
       if (graph.IsCompilingOsr()) {
-        DCHECK(code_info.GetOsrStackMapForDexPc(dex_pc, encoding).IsValid());
+        DCHECK(code_info.GetOsrStackMapForDexPc(dex_pc).IsValid());
       }
       ++(*covered)[i];
     }
diff --git a/compiler/optimizing/code_generator.h b/compiler/optimizing/code_generator.h
index bcb2599..a340446 100644
--- a/compiler/optimizing/code_generator.h
+++ b/compiler/optimizing/code_generator.h
@@ -35,7 +35,6 @@
 #include "optimizing_compiler_stats.h"
 #include "read_barrier_option.h"
 #include "stack.h"
-#include "stack_map.h"
 #include "utils/label.h"
 
 namespace art {
diff --git a/compiler/optimizing/code_generator_arm64.h b/compiler/optimizing/code_generator_arm64.h
index aa343b1..e7fe5b7 100644
--- a/compiler/optimizing/code_generator_arm64.h
+++ b/compiler/optimizing/code_generator_arm64.h
@@ -17,7 +17,6 @@
 #ifndef ART_COMPILER_OPTIMIZING_CODE_GENERATOR_ARM64_H_
 #define ART_COMPILER_OPTIMIZING_CODE_GENERATOR_ARM64_H_
 
-#include "arch/arm64/quick_method_frame_info_arm64.h"
 #include "base/bit_field.h"
 #include "code_generator.h"
 #include "common_arm64.h"
diff --git a/compiler/optimizing/load_store_elimination.cc b/compiler/optimizing/load_store_elimination.cc
index 35e64f7..28ac942 100644
--- a/compiler/optimizing/load_store_elimination.cc
+++ b/compiler/optimizing/load_store_elimination.cc
@@ -458,8 +458,13 @@
       }
       if (from_all_predecessors) {
         if (ref_info->IsSingletonAndRemovable() &&
-            block->IsSingleReturnOrReturnVoidAllowingPhis()) {
-          // Values in the singleton are not needed anymore.
+            (block->IsSingleReturnOrReturnVoidAllowingPhis() ||
+             (block->EndsWithReturn() && (merged_value != kUnknownHeapValue ||
+                                          merged_store_value != kUnknownHeapValue)))) {
+          // Values in the singleton are not needed anymore:
+          // (1) if this block consists of a sole return, or
+          // (2) if this block returns and a usable merged value is obtained
+          //     (loads prior to the return will always use that value).
         } else if (!IsStore(merged_value)) {
           // We don't track merged value as a store anymore. We have to
           // hold the stores in predecessors live here.
diff --git a/compiler/optimizing/nodes.cc b/compiler/optimizing/nodes.cc
index 5f2833e..7f78dc2 100644
--- a/compiler/optimizing/nodes.cc
+++ b/compiler/optimizing/nodes.cc
@@ -1951,6 +1951,11 @@
   return !GetInstructions().IsEmpty() && GetLastInstruction()->IsControlFlow();
 }
 
+bool HBasicBlock::EndsWithReturn() const {
+  return !GetInstructions().IsEmpty() &&
+      (GetLastInstruction()->IsReturn() || GetLastInstruction()->IsReturnVoid());
+}
+
 bool HBasicBlock::EndsWithIf() const {
   return !GetInstructions().IsEmpty() && GetLastInstruction()->IsIf();
 }
diff --git a/compiler/optimizing/nodes.h b/compiler/optimizing/nodes.h
index e786502..09d9c57 100644
--- a/compiler/optimizing/nodes.h
+++ b/compiler/optimizing/nodes.h
@@ -1285,6 +1285,7 @@
   void SetLifetimeEnd(size_t end) { lifetime_end_ = end; }
 
   bool EndsWithControlFlowInstruction() const;
+  bool EndsWithReturn() const;
   bool EndsWithIf() const;
   bool EndsWithTryBoundary() const;
   bool HasSinglePhi() const;
diff --git a/compiler/optimizing/stack_map_stream.cc b/compiler/optimizing/stack_map_stream.cc
index bf7c554..aa28c8b 100644
--- a/compiler/optimizing/stack_map_stream.cc
+++ b/compiler/optimizing/stack_map_stream.cc
@@ -51,15 +51,7 @@
   if (sp_mask != nullptr) {
     stack_mask_max_ = std::max(stack_mask_max_, sp_mask->GetHighestBitSet());
   }
-  if (inlining_depth > 0) {
-    number_of_stack_maps_with_inline_info_++;
-  }
 
-  // Note: dex_pc can be kNoDexPc for native method intrinsics.
-  if (dex_pc != dex::kDexNoIndex && (dex_pc_max_ == dex::kDexNoIndex || dex_pc_max_ < dex_pc)) {
-    dex_pc_max_ = dex_pc;
-  }
-  register_mask_max_ = std::max(register_mask_max_, register_mask);
   current_dex_register_ = 0;
 }
 
@@ -146,51 +138,6 @@
   current_inline_info_ = InlineInfoEntry();
 }
 
-CodeOffset StackMapStream::ComputeMaxNativePcCodeOffset() const {
-  CodeOffset max_native_pc_offset;
-  for (const StackMapEntry& entry : stack_maps_) {
-    max_native_pc_offset = std::max(max_native_pc_offset, entry.native_pc_code_offset);
-  }
-  return max_native_pc_offset;
-}
-
-size_t StackMapStream::PrepareForFillIn() {
-  CodeInfoEncoding encoding;
-  encoding.dex_register_map.num_entries = 0;  // TODO: Remove this field.
-  encoding.dex_register_map.num_bytes = ComputeDexRegisterMapsSize();
-  encoding.location_catalog.num_entries = location_catalog_entries_.size();
-  encoding.location_catalog.num_bytes = ComputeDexRegisterLocationCatalogSize();
-  encoding.inline_info.num_entries = inline_infos_.size();
-  // Must be done before calling ComputeInlineInfoEncoding since ComputeInlineInfoEncoding requires
-  // dex_method_index_idx to be filled in.
-  PrepareMethodIndices();
-  ComputeInlineInfoEncoding(&encoding.inline_info.encoding,
-                            encoding.dex_register_map.num_bytes);
-  CodeOffset max_native_pc_offset = ComputeMaxNativePcCodeOffset();
-  // Prepare the CodeInfo variable-sized encoding.
-  encoding.stack_mask.encoding.num_bits = stack_mask_max_ + 1;  // Need room for max element too.
-  encoding.stack_mask.num_entries = PrepareStackMasks(encoding.stack_mask.encoding.num_bits);
-  encoding.register_mask.encoding.num_bits = MinimumBitsToStore(register_mask_max_);
-  encoding.register_mask.num_entries = PrepareRegisterMasks();
-  encoding.stack_map.num_entries = stack_maps_.size();
-  encoding.stack_map.encoding.SetFromSizes(
-      // The stack map contains compressed native PC offsets.
-      max_native_pc_offset.CompressedValue(),
-      dex_pc_max_,
-      encoding.dex_register_map.num_bytes,
-      encoding.inline_info.num_entries,
-      encoding.register_mask.num_entries,
-      encoding.stack_mask.num_entries);
-  ComputeInvokeInfoEncoding(&encoding);
-  DCHECK_EQ(code_info_encoding_.size(), 0u);
-  encoding.Compress(&code_info_encoding_);
-  encoding.ComputeTableOffsets();
-  // Compute table offsets so we can get the non header size.
-  DCHECK_EQ(encoding.HeaderSize(), code_info_encoding_.size());
-  needed_size_ = code_info_encoding_.size() + encoding.NonHeaderSize();
-  return needed_size_;
-}
-
 size_t StackMapStream::ComputeDexRegisterLocationCatalogSize() const {
   size_t size = DexRegisterLocationCatalog::kFixedSize;
   for (const DexRegisterLocation& dex_register_location : location_catalog_entries_) {
@@ -204,6 +151,10 @@
   if (num_dex_registers == 0u) {
     return 0u;  // No register map will be emitted.
   }
+  size_t number_of_live_dex_registers = live_dex_registers_mask->NumSetBits();
+  if (live_dex_registers_mask->NumSetBits() == 0) {
+    return 0u;  // No register map will be emitted.
+  }
   DCHECK(live_dex_registers_mask != nullptr);
 
   // Size of the map in bytes.
@@ -211,7 +162,6 @@
   // Add the live bit mask for the Dex register liveness.
   size += DexRegisterMap::GetLiveBitMaskSize(num_dex_registers);
   // Compute the size of the set of live Dex register entries.
-  size_t number_of_live_dex_registers = live_dex_registers_mask->NumSetBits();
   size_t map_entries_size_in_bits =
       DexRegisterMap::SingleEntrySizeInBits(catalog_size) * number_of_live_dex_registers;
   size_t map_entries_size_in_bytes =
@@ -220,86 +170,6 @@
   return size;
 }
 
-size_t StackMapStream::ComputeDexRegisterMapsSize() const {
-  size_t size = 0;
-  for (const DexRegisterMapEntry& entry : dex_register_entries_) {
-    size += entry.ComputeSize(location_catalog_entries_.size());
-  }
-  return size;
-}
-
-void StackMapStream::ComputeInvokeInfoEncoding(CodeInfoEncoding* encoding) {
-  DCHECK(encoding != nullptr);
-  uint32_t native_pc_max = 0;
-  uint16_t method_index_max = 0;
-  size_t invoke_infos_count = 0;
-  size_t invoke_type_max = 0;
-  for (const StackMapEntry& entry : stack_maps_) {
-    if (entry.dex_method_index != dex::kDexNoIndex) {
-      native_pc_max = std::max(native_pc_max, entry.native_pc_code_offset.CompressedValue());
-      method_index_max = std::max(method_index_max, static_cast<uint16_t>(entry.dex_method_index));
-      invoke_type_max = std::max(invoke_type_max, static_cast<size_t>(entry.invoke_type));
-      ++invoke_infos_count;
-    }
-  }
-  encoding->invoke_info.num_entries = invoke_infos_count;
-  encoding->invoke_info.encoding.SetFromSizes(native_pc_max, invoke_type_max, method_index_max);
-}
-
-void StackMapStream::ComputeInlineInfoEncoding(InlineInfoEncoding* encoding,
-                                               size_t dex_register_maps_bytes) {
-  uint32_t method_index_max = 0;
-  uint32_t dex_pc_max = dex::kDexNoIndex;
-  uint32_t extra_data_max = 0;
-
-  uint32_t inline_info_index = 0;
-  for (const StackMapEntry& entry : stack_maps_) {
-    for (size_t j = 0; j < entry.inlining_depth; ++j) {
-      InlineInfoEntry inline_entry = inline_infos_[inline_info_index++];
-      if (inline_entry.method == nullptr) {
-        method_index_max = std::max(method_index_max, inline_entry.dex_method_index_idx);
-        extra_data_max = std::max(extra_data_max, 1u);
-      } else {
-        method_index_max = std::max(
-            method_index_max, High32Bits(reinterpret_cast<uintptr_t>(inline_entry.method)));
-        extra_data_max = std::max(
-            extra_data_max, Low32Bits(reinterpret_cast<uintptr_t>(inline_entry.method)));
-      }
-      if (inline_entry.dex_pc != dex::kDexNoIndex &&
-          (dex_pc_max == dex::kDexNoIndex || dex_pc_max < inline_entry.dex_pc)) {
-        dex_pc_max = inline_entry.dex_pc;
-      }
-    }
-  }
-  DCHECK_EQ(inline_info_index, inline_infos_.size());
-
-  encoding->SetFromSizes(method_index_max, dex_pc_max, extra_data_max, dex_register_maps_bytes);
-}
-
-size_t StackMapStream::MaybeCopyDexRegisterMap(DexRegisterMapEntry& entry,
-                                               size_t* current_offset,
-                                               MemoryRegion dex_register_locations_region) {
-  DCHECK(current_offset != nullptr);
-  if ((entry.num_dex_registers == 0) || (entry.live_dex_registers_mask->NumSetBits() == 0)) {
-    // No dex register map needed.
-    return StackMap::kNoDexRegisterMap;
-  }
-  if (entry.offset == DexRegisterMapEntry::kOffsetUnassigned) {
-    // Not already copied, need to copy and and assign an offset.
-    entry.offset = *current_offset;
-    const size_t entry_size = entry.ComputeSize(location_catalog_entries_.size());
-    DexRegisterMap dex_register_map(
-        dex_register_locations_region.Subregion(entry.offset, entry_size));
-    *current_offset += entry_size;
-    // Fill in the map since it was just added.
-    FillInDexRegisterMap(dex_register_map,
-                         entry.num_dex_registers,
-                         *entry.live_dex_registers_mask,
-                         entry.locations_start_index);
-  }
-  return entry.offset;
-}
-
 void StackMapStream::FillInMethodInfo(MemoryRegion region) {
   {
     MethodInfo info(region.begin(), method_indices_.size());
@@ -318,30 +188,64 @@
   }
 }
 
-void StackMapStream::FillInCodeInfo(MemoryRegion region) {
-  DCHECK_EQ(0u, current_entry_.dex_pc) << "EndStackMapEntry not called after BeginStackMapEntry";
-  DCHECK_NE(0u, needed_size_) << "PrepareForFillIn not called before FillIn";
+template<typename Vector>
+static MemoryRegion EncodeMemoryRegion(Vector* out, size_t* bit_offset, uint32_t bit_length) {
+  uint32_t byte_length = BitsToBytesRoundUp(bit_length);
+  EncodeVarintBits(out, bit_offset, byte_length);
+  *bit_offset = RoundUp(*bit_offset, kBitsPerByte);
+  out->resize(out->size() + byte_length);
+  MemoryRegion region(out->data() + *bit_offset / kBitsPerByte, byte_length);
+  *bit_offset += kBitsPerByte * byte_length;
+  return region;
+}
 
-  DCHECK_EQ(region.size(), needed_size_);
+template<uint32_t NumColumns>
+using ScopedBitTableBuilder = BitTableBuilder<NumColumns, ScopedArenaAllocatorAdapter<uint32_t>>;
 
-  // Note that the memory region does not have to be zeroed when we JIT code
-  // because we do not use the arena allocator there.
+size_t StackMapStream::PrepareForFillIn() {
+  size_t bit_offset = 0;
+  out_.clear();
 
-  // Write the CodeInfo header.
-  region.CopyFrom(0, MemoryRegion(code_info_encoding_.data(), code_info_encoding_.size()));
+  // Decide the offsets of dex register map entries, but do not write them out yet.
+  // Needs to be done first as it modifies the stack map entry.
+  size_t dex_register_map_bytes = 0;
+  for (DexRegisterMapEntry& entry : dex_register_entries_) {
+    size_t size = entry.ComputeSize(location_catalog_entries_.size());
+    entry.offset = size == 0 ? DexRegisterMapEntry::kOffsetUnassigned : dex_register_map_bytes;
+    dex_register_map_bytes += size;
+  }
 
-  CodeInfo code_info(region);
-  CodeInfoEncoding encoding = code_info.ExtractEncoding();
-  DCHECK_EQ(encoding.stack_map.num_entries, stack_maps_.size());
+  // Must be done before calling ComputeInlineInfoEncoding since ComputeInlineInfoEncoding requires
+  // dex_method_index_idx to be filled in.
+  PrepareMethodIndices();
 
-  MemoryRegion dex_register_locations_region = region.Subregion(
-      encoding.dex_register_map.byte_offset,
-      encoding.dex_register_map.num_bytes);
+  // Dedup stack masks. Needs to be done first as it modifies the stack map entry.
+  size_t stack_mask_bits = stack_mask_max_ + 1;  // Need room for max element too.
+  size_t num_stack_masks = PrepareStackMasks(stack_mask_bits);
 
-  // Set the Dex register location catalog.
-  MemoryRegion dex_register_location_catalog_region = region.Subregion(
-      encoding.location_catalog.byte_offset,
-      encoding.location_catalog.num_bytes);
+  // Dedup register masks. Needs to be done first as it modifies the stack map entry.
+  size_t num_register_masks = PrepareRegisterMasks();
+
+  // Write dex register maps.
+  MemoryRegion dex_register_map_region =
+      EncodeMemoryRegion(&out_, &bit_offset, dex_register_map_bytes * kBitsPerByte);
+  for (DexRegisterMapEntry& entry : dex_register_entries_) {
+    size_t entry_size = entry.ComputeSize(location_catalog_entries_.size());
+    if (entry_size != 0) {
+      DexRegisterMap dex_register_map(
+          dex_register_map_region.Subregion(entry.offset, entry_size));
+      FillInDexRegisterMap(dex_register_map,
+                           entry.num_dex_registers,
+                           *entry.live_dex_registers_mask,
+                           entry.locations_start_index);
+    }
+  }
+
+  // Write dex register catalog.
+  EncodeVarintBits(&out_, &bit_offset, location_catalog_entries_.size());
+  size_t location_catalog_bytes = ComputeDexRegisterLocationCatalogSize();
+  MemoryRegion dex_register_location_catalog_region =
+      EncodeMemoryRegion(&out_, &bit_offset, location_catalog_bytes * kBitsPerByte);
   DexRegisterLocationCatalog dex_register_location_catalog(dex_register_location_catalog_region);
   // Offset in `dex_register_location_catalog` where to store the next
   // register location.
@@ -353,82 +257,70 @@
   // Ensure we reached the end of the Dex registers location_catalog.
   DCHECK_EQ(location_catalog_offset, dex_register_location_catalog_region.size());
 
-  ArenaBitVector empty_bitmask(allocator_, 0, /* expandable */ false, kArenaAllocStackMapStream);
-  uintptr_t next_dex_register_map_offset = 0;
-  uintptr_t next_inline_info_index = 0;
-  size_t invoke_info_idx = 0;
-  for (size_t i = 0, e = stack_maps_.size(); i < e; ++i) {
-    StackMap stack_map = code_info.GetStackMapAt(i, encoding);
-    StackMapEntry entry = stack_maps_[i];
-
-    stack_map.SetDexPc(encoding.stack_map.encoding, entry.dex_pc);
-    stack_map.SetNativePcCodeOffset(encoding.stack_map.encoding, entry.native_pc_code_offset);
-    stack_map.SetRegisterMaskIndex(encoding.stack_map.encoding, entry.register_mask_index);
-    stack_map.SetStackMaskIndex(encoding.stack_map.encoding, entry.stack_mask_index);
-
-    size_t offset = MaybeCopyDexRegisterMap(dex_register_entries_[entry.dex_register_map_index],
-                                            &next_dex_register_map_offset,
-                                            dex_register_locations_region);
-    stack_map.SetDexRegisterMapOffset(encoding.stack_map.encoding, offset);
-
+  // Write stack maps.
+  ScopedArenaAllocatorAdapter<void> adapter = allocator_->Adapter(kArenaAllocStackMapStream);
+  ScopedBitTableBuilder<StackMap::Field::kCount> stack_map_builder((adapter));
+  ScopedBitTableBuilder<InvokeInfo::Field::kCount> invoke_info_builder((adapter));
+  ScopedBitTableBuilder<InlineInfo::Field::kCount> inline_info_builder((adapter));
+  for (const StackMapEntry& entry : stack_maps_) {
     if (entry.dex_method_index != dex::kDexNoIndex) {
-      InvokeInfo invoke_info(code_info.GetInvokeInfo(encoding, invoke_info_idx));
-      invoke_info.SetNativePcCodeOffset(encoding.invoke_info.encoding, entry.native_pc_code_offset);
-      invoke_info.SetInvokeType(encoding.invoke_info.encoding, entry.invoke_type);
-      invoke_info.SetMethodIndexIdx(encoding.invoke_info.encoding, entry.dex_method_index_idx);
-      ++invoke_info_idx;
+      invoke_info_builder.AddRow(
+          entry.native_pc_code_offset.CompressedValue(),
+          entry.invoke_type,
+          entry.dex_method_index_idx);
     }
 
     // Set the inlining info.
-    if (entry.inlining_depth != 0) {
-      InlineInfo inline_info = code_info.GetInlineInfo(next_inline_info_index, encoding);
-
-      // Fill in the index.
-      stack_map.SetInlineInfoIndex(encoding.stack_map.encoding, next_inline_info_index);
-      DCHECK_EQ(next_inline_info_index, entry.inline_infos_start_index);
-      next_inline_info_index += entry.inlining_depth;
-
-      inline_info.SetDepth(encoding.inline_info.encoding, entry.inlining_depth);
-      DCHECK_LE(entry.inline_infos_start_index + entry.inlining_depth, inline_infos_.size());
-
-      for (size_t depth = 0; depth < entry.inlining_depth; ++depth) {
-        InlineInfoEntry inline_entry = inline_infos_[depth + entry.inline_infos_start_index];
-        if (inline_entry.method != nullptr) {
-          inline_info.SetMethodIndexIdxAtDepth(
-              encoding.inline_info.encoding,
-              depth,
-              High32Bits(reinterpret_cast<uintptr_t>(inline_entry.method)));
-          inline_info.SetExtraDataAtDepth(
-              encoding.inline_info.encoding,
-              depth,
-              Low32Bits(reinterpret_cast<uintptr_t>(inline_entry.method)));
-        } else {
-          inline_info.SetMethodIndexIdxAtDepth(encoding.inline_info.encoding,
-                                               depth,
-                                               inline_entry.dex_method_index_idx);
-          inline_info.SetExtraDataAtDepth(encoding.inline_info.encoding, depth, 1);
-        }
-        inline_info.SetDexPcAtDepth(encoding.inline_info.encoding, depth, inline_entry.dex_pc);
-        size_t dex_register_map_offset = MaybeCopyDexRegisterMap(
-            dex_register_entries_[inline_entry.dex_register_map_index],
-            &next_dex_register_map_offset,
-            dex_register_locations_region);
-        inline_info.SetDexRegisterMapOffsetAtDepth(encoding.inline_info.encoding,
-                                                   depth,
-                                                   dex_register_map_offset);
+    uint32_t inline_info_index = StackMap::kNoValue;
+    DCHECK_LE(entry.inline_infos_start_index + entry.inlining_depth, inline_infos_.size());
+    for (size_t depth = 0; depth < entry.inlining_depth; ++depth) {
+      InlineInfoEntry inline_entry = inline_infos_[depth + entry.inline_infos_start_index];
+      uint32_t method_index_idx = inline_entry.dex_method_index_idx;
+      uint32_t extra_data = 1;
+      if (inline_entry.method != nullptr) {
+        method_index_idx = High32Bits(reinterpret_cast<uintptr_t>(inline_entry.method));
+        extra_data = Low32Bits(reinterpret_cast<uintptr_t>(inline_entry.method));
       }
-    } else if (encoding.stack_map.encoding.GetInlineInfoEncoding().BitSize() > 0) {
-      stack_map.SetInlineInfoIndex(encoding.stack_map.encoding, StackMap::kNoInlineInfo);
+      uint32_t index = inline_info_builder.AddRow(
+          (depth == entry.inlining_depth - 1) ? InlineInfo::kLast : InlineInfo::kMore,
+          method_index_idx,
+          inline_entry.dex_pc,
+          extra_data,
+          dex_register_entries_[inline_entry.dex_register_map_index].offset);
+      if (depth == 0) {
+        inline_info_index = index;
+      }
     }
+    stack_map_builder.AddRow(
+        entry.native_pc_code_offset.CompressedValue(),
+        entry.dex_pc,
+        dex_register_entries_[entry.dex_register_map_index].offset,
+        inline_info_index,
+        entry.register_mask_index,
+        entry.stack_mask_index);
   }
+  stack_map_builder.Encode(&out_, &bit_offset);
+  invoke_info_builder.Encode(&out_, &bit_offset);
+  inline_info_builder.Encode(&out_, &bit_offset);
+
+  // Write register masks table.
+  ScopedBitTableBuilder<1> register_mask_builder((adapter));
+  for (size_t i = 0; i < num_register_masks; ++i) {
+    register_mask_builder.AddRow(register_masks_[i]);
+  }
+  register_mask_builder.Encode(&out_, &bit_offset);
 
   // Write stack masks table.
-  const size_t stack_mask_bits = encoding.stack_mask.encoding.BitSize();
+  EncodeVarintBits(&out_, &bit_offset, stack_mask_bits);
+  out_.resize(BitsToBytesRoundUp(bit_offset + stack_mask_bits * num_stack_masks));
+  BitMemoryRegion stack_mask_region(MemoryRegion(out_.data(), out_.size()),
+                                    bit_offset,
+                                    stack_mask_bits * num_stack_masks);
   if (stack_mask_bits > 0) {
-    size_t stack_mask_bytes = RoundUp(stack_mask_bits, kBitsPerByte) / kBitsPerByte;
-    for (size_t i = 0; i < encoding.stack_mask.num_entries; ++i) {
+    for (size_t i = 0; i < num_stack_masks; ++i) {
+      size_t stack_mask_bytes = BitsToBytesRoundUp(stack_mask_bits);
       BitMemoryRegion src(MemoryRegion(&stack_masks_[i * stack_mask_bytes], stack_mask_bytes));
-      BitMemoryRegion dst = code_info.GetStackMask(i, encoding);
+      BitMemoryRegion dst = stack_mask_region.Subregion(i * stack_mask_bits, stack_mask_bits);
       for (size_t bit_index = 0; bit_index < stack_mask_bits; bit_index += BitSizeOf<uint32_t>()) {
         size_t num_bits = std::min<size_t>(stack_mask_bits - bit_index, BitSizeOf<uint32_t>());
         dst.StoreBits(bit_index, src.LoadBits(bit_index, num_bits), num_bits);
@@ -436,11 +328,16 @@
     }
   }
 
-  // Write register masks table.
-  for (size_t i = 0; i < encoding.register_mask.num_entries; ++i) {
-    BitMemoryRegion register_mask = code_info.GetRegisterMask(i, encoding);
-    register_mask.StoreBits(0, register_masks_[i], encoding.register_mask.encoding.BitSize());
-  }
+  return UnsignedLeb128Size(out_.size()) +  out_.size();
+}
+
+void StackMapStream::FillInCodeInfo(MemoryRegion region) {
+  DCHECK_EQ(0u, current_entry_.dex_pc) << "EndStackMapEntry not called after BeginStackMapEntry";
+  DCHECK_NE(0u, out_.size()) << "PrepareForFillIn not called before FillIn";
+  DCHECK_EQ(region.size(), UnsignedLeb128Size(out_.size()) +  out_.size());
+
+  uint8_t* ptr = EncodeUnsignedLeb128(region.begin(), out_.size());
+  region.CopyFromVector(ptr - region.begin(), out_);
 
   // Verify all written data in debug build.
   if (kIsDebugBuild) {
@@ -528,7 +425,6 @@
                                          size_t num_dex_registers,
                                          BitVector* live_dex_registers_mask,
                                          size_t dex_register_locations_index) const {
-  CodeInfoEncoding encoding = code_info.ExtractEncoding();
   for (size_t reg = 0; reg < num_dex_registers; reg++) {
     // Find the location we tried to encode.
     DexRegisterLocation expected = DexRegisterLocation::None();
@@ -543,7 +439,7 @@
     } else {
       DCHECK(dex_register_map.IsDexRegisterLive(reg));
       DexRegisterLocation seen = dex_register_map.GetDexRegisterLocation(
-          reg, num_dex_registers, code_info, encoding);
+          reg, num_dex_registers, code_info);
       DCHECK_EQ(expected.GetKind(), seen.GetKind());
       DCHECK_EQ(expected.GetValue(), seen.GetValue());
     }
@@ -613,23 +509,23 @@
 // Check that all StackMapStream inputs are correctly encoded by trying to read them back.
 void StackMapStream::CheckCodeInfo(MemoryRegion region) const {
   CodeInfo code_info(region);
-  CodeInfoEncoding encoding = code_info.ExtractEncoding();
-  DCHECK_EQ(code_info.GetNumberOfStackMaps(encoding), stack_maps_.size());
+  DCHECK_EQ(code_info.GetNumberOfStackMaps(), stack_maps_.size());
+  DCHECK_EQ(code_info.GetNumberOfStackMaskBits(), static_cast<uint32_t>(stack_mask_max_ + 1));
+  DCHECK_EQ(code_info.GetNumberOfLocationCatalogEntries(), location_catalog_entries_.size());
   size_t invoke_info_index = 0;
   for (size_t s = 0; s < stack_maps_.size(); ++s) {
-    const StackMap stack_map = code_info.GetStackMapAt(s, encoding);
-    const StackMapEncoding& stack_map_encoding = encoding.stack_map.encoding;
+    const StackMap stack_map = code_info.GetStackMapAt(s);
     StackMapEntry entry = stack_maps_[s];
 
     // Check main stack map fields.
-    DCHECK_EQ(stack_map.GetNativePcOffset(stack_map_encoding, instruction_set_),
+    DCHECK_EQ(stack_map.GetNativePcOffset(instruction_set_),
               entry.native_pc_code_offset.Uint32Value(instruction_set_));
-    DCHECK_EQ(stack_map.GetDexPc(stack_map_encoding), entry.dex_pc);
-    DCHECK_EQ(stack_map.GetRegisterMaskIndex(stack_map_encoding), entry.register_mask_index);
-    DCHECK_EQ(code_info.GetRegisterMaskOf(encoding, stack_map), entry.register_mask);
-    const size_t num_stack_mask_bits = code_info.GetNumberOfStackMaskBits(encoding);
-    DCHECK_EQ(stack_map.GetStackMaskIndex(stack_map_encoding), entry.stack_mask_index);
-    BitMemoryRegion stack_mask = code_info.GetStackMaskOf(encoding, stack_map);
+    DCHECK_EQ(stack_map.GetDexPc(), entry.dex_pc);
+    DCHECK_EQ(stack_map.GetRegisterMaskIndex(), entry.register_mask_index);
+    DCHECK_EQ(code_info.GetRegisterMaskOf(stack_map), entry.register_mask);
+    const size_t num_stack_mask_bits = code_info.GetNumberOfStackMaskBits();
+    DCHECK_EQ(stack_map.GetStackMaskIndex(), entry.stack_mask_index);
+    BitMemoryRegion stack_mask = code_info.GetStackMaskOf(stack_map);
     if (entry.sp_mask != nullptr) {
       DCHECK_GE(stack_mask.size_in_bits(), entry.sp_mask->GetNumberOfBits());
       for (size_t b = 0; b < num_stack_mask_bits; b++) {
@@ -641,38 +537,36 @@
       }
     }
     if (entry.dex_method_index != dex::kDexNoIndex) {
-      InvokeInfo invoke_info = code_info.GetInvokeInfo(encoding, invoke_info_index);
-      DCHECK_EQ(invoke_info.GetNativePcOffset(encoding.invoke_info.encoding, instruction_set_),
+      InvokeInfo invoke_info = code_info.GetInvokeInfo(invoke_info_index);
+      DCHECK_EQ(invoke_info.GetNativePcOffset(instruction_set_),
                 entry.native_pc_code_offset.Uint32Value(instruction_set_));
-      DCHECK_EQ(invoke_info.GetInvokeType(encoding.invoke_info.encoding), entry.invoke_type);
-      DCHECK_EQ(invoke_info.GetMethodIndexIdx(encoding.invoke_info.encoding),
-                entry.dex_method_index_idx);
+      DCHECK_EQ(invoke_info.GetInvokeType(), entry.invoke_type);
+      DCHECK_EQ(invoke_info.GetMethodIndexIdx(), entry.dex_method_index_idx);
       invoke_info_index++;
     }
     CheckDexRegisterMap(code_info,
                         code_info.GetDexRegisterMapOf(
-                            stack_map, encoding, entry.dex_register_entry.num_dex_registers),
+                            stack_map, entry.dex_register_entry.num_dex_registers),
                         entry.dex_register_entry.num_dex_registers,
                         entry.dex_register_entry.live_dex_registers_mask,
                         entry.dex_register_entry.locations_start_index);
 
     // Check inline info.
-    DCHECK_EQ(stack_map.HasInlineInfo(stack_map_encoding), (entry.inlining_depth != 0));
+    DCHECK_EQ(stack_map.HasInlineInfo(), (entry.inlining_depth != 0));
     if (entry.inlining_depth != 0) {
-      InlineInfo inline_info = code_info.GetInlineInfoOf(stack_map, encoding);
-      DCHECK_EQ(inline_info.GetDepth(encoding.inline_info.encoding), entry.inlining_depth);
+      InlineInfo inline_info = code_info.GetInlineInfoOf(stack_map);
+      DCHECK_EQ(inline_info.GetDepth(), entry.inlining_depth);
       for (size_t d = 0; d < entry.inlining_depth; ++d) {
         size_t inline_info_index = entry.inline_infos_start_index + d;
         DCHECK_LT(inline_info_index, inline_infos_.size());
         InlineInfoEntry inline_entry = inline_infos_[inline_info_index];
-        DCHECK_EQ(inline_info.GetDexPcAtDepth(encoding.inline_info.encoding, d),
-                  inline_entry.dex_pc);
-        if (inline_info.EncodesArtMethodAtDepth(encoding.inline_info.encoding, d)) {
-          DCHECK_EQ(inline_info.GetArtMethodAtDepth(encoding.inline_info.encoding, d),
+        DCHECK_EQ(inline_info.GetDexPcAtDepth(d), inline_entry.dex_pc);
+        if (inline_info.EncodesArtMethodAtDepth(d)) {
+          DCHECK_EQ(inline_info.GetArtMethodAtDepth(d),
                     inline_entry.method);
         } else {
           const size_t method_index_idx =
-              inline_info.GetMethodIndexIdxAtDepth(encoding.inline_info.encoding, d);
+              inline_info.GetMethodIndexIdxAtDepth(d);
           DCHECK_EQ(method_index_idx, inline_entry.dex_method_index_idx);
           DCHECK_EQ(method_indices_[method_index_idx], inline_entry.method_index);
         }
@@ -681,7 +575,6 @@
                             code_info.GetDexRegisterMapAtDepth(
                                 d,
                                 inline_info,
-                                encoding,
                                 inline_entry.dex_register_entry.num_dex_registers),
                             inline_entry.dex_register_entry.num_dex_registers,
                             inline_entry.dex_register_entry.live_dex_registers_mask,
@@ -692,7 +585,7 @@
 }
 
 size_t StackMapStream::ComputeMethodInfoSize() const {
-  DCHECK_NE(0u, needed_size_) << "PrepareForFillIn not called before " << __FUNCTION__;
+  DCHECK_NE(0u, out_.size()) << "PrepareForFillIn not called before " << __FUNCTION__;
   return MethodInfo::ComputeSize(method_indices_.size());
 }
 
diff --git a/compiler/optimizing/stack_map_stream.h b/compiler/optimizing/stack_map_stream.h
index 268e9bd..ea97cf6 100644
--- a/compiler/optimizing/stack_map_stream.h
+++ b/compiler/optimizing/stack_map_stream.h
@@ -73,36 +73,32 @@
         method_indices_(allocator->Adapter(kArenaAllocStackMapStream)),
         dex_register_entries_(allocator->Adapter(kArenaAllocStackMapStream)),
         stack_mask_max_(-1),
-        dex_pc_max_(kNoDexPc),
-        register_mask_max_(0),
-        number_of_stack_maps_with_inline_info_(0),
+        out_(allocator->Adapter(kArenaAllocStackMapStream)),
         dex_map_hash_to_stack_map_indices_(std::less<uint32_t>(),
                                            allocator->Adapter(kArenaAllocStackMapStream)),
         current_entry_(),
         current_inline_info_(),
-        code_info_encoding_(allocator->Adapter(kArenaAllocStackMapStream)),
-        needed_size_(0),
         current_dex_register_(0),
         in_inline_frame_(false) {
     stack_maps_.reserve(10);
+    out_.reserve(64);
     location_catalog_entries_.reserve(4);
     dex_register_locations_.reserve(10 * 4);
     inline_infos_.reserve(2);
-    code_info_encoding_.reserve(16);
   }
 
   // A dex register map entry for a single stack map entry, contains what registers are live as
   // well as indices into the location catalog.
   class DexRegisterMapEntry {
    public:
-    static const size_t kOffsetUnassigned = -1;
+    static const uint32_t kOffsetUnassigned = -1;
 
     BitVector* live_dex_registers_mask;
     uint32_t num_dex_registers;
     size_t locations_start_index;
     // Computed fields
     size_t hash = 0;
-    size_t offset = kOffsetUnassigned;
+    uint32_t offset = kOffsetUnassigned;
 
     size_t ComputeSize(size_t catalog_size) const;
   };
@@ -113,7 +109,7 @@
     CodeOffset native_pc_code_offset;
     uint32_t register_mask;
     BitVector* sp_mask;
-    uint8_t inlining_depth;
+    uint32_t inlining_depth;
     size_t inline_infos_start_index;
     uint32_t stack_mask_index;
     uint32_t register_mask_index;
@@ -174,11 +170,6 @@
 
  private:
   size_t ComputeDexRegisterLocationCatalogSize() const;
-  size_t ComputeDexRegisterMapsSize() const;
-  void ComputeInlineInfoEncoding(InlineInfoEncoding* encoding,
-                                 size_t dex_register_maps_bytes);
-
-  CodeOffset ComputeMaxNativePcCodeOffset() const;
 
   // Returns the number of unique stack masks.
   size_t PrepareStackMasks(size_t entry_size_in_bits);
@@ -197,24 +188,11 @@
   bool DexRegisterMapEntryEquals(const DexRegisterMapEntry& a, const DexRegisterMapEntry& b) const;
 
   // Fill in the corresponding entries of a register map.
-  void ComputeInvokeInfoEncoding(CodeInfoEncoding* encoding);
-
-  // Returns the index of an entry with the same dex register map as the current_entry,
-  // or kNoSameDexMapFound if no such entry exists.
-  size_t FindEntryWithTheSameDexMap();
-  bool HaveTheSameDexMaps(const StackMapEntry& a, const StackMapEntry& b) const;
-
-  // Fill in the corresponding entries of a register map.
   void FillInDexRegisterMap(DexRegisterMap dex_register_map,
                             uint32_t num_dex_registers,
                             const BitVector& live_dex_registers_mask,
                             uint32_t start_index_in_dex_register_locations) const;
 
-  // Returns the offset for the dex register inside of the dex register location region. See FillIn.
-  // Only copies the dex register map if the offset for the entry is not already assigned.
-  size_t MaybeCopyDexRegisterMap(DexRegisterMapEntry& entry,
-                                 size_t* current_offset,
-                                 MemoryRegion dex_register_locations_region);
   void CheckDexRegisterMap(const CodeInfo& code_info,
                            const DexRegisterMap& dex_register_map,
                            size_t num_dex_registers,
@@ -244,21 +222,16 @@
   ScopedArenaVector<uint32_t> method_indices_;
   ScopedArenaVector<DexRegisterMapEntry> dex_register_entries_;
   int stack_mask_max_;
-  uint32_t dex_pc_max_;
-  uint32_t register_mask_max_;
-  size_t number_of_stack_maps_with_inline_info_;
+
+  ScopedArenaVector<uint8_t> out_;
 
   ScopedArenaSafeMap<uint32_t, ScopedArenaVector<uint32_t>> dex_map_hash_to_stack_map_indices_;
 
   StackMapEntry current_entry_;
   InlineInfoEntry current_inline_info_;
-  ScopedArenaVector<uint8_t> code_info_encoding_;
-  size_t needed_size_;
   uint32_t current_dex_register_;
   bool in_inline_frame_;
 
-  static constexpr uint32_t kNoSameDexMapFound = -1;
-
   DISALLOW_COPY_AND_ASSIGN(StackMapStream);
 };
 
diff --git a/compiler/optimizing/stack_map_test.cc b/compiler/optimizing/stack_map_test.cc
index e36c592..9db7588 100644
--- a/compiler/optimizing/stack_map_test.cc
+++ b/compiler/optimizing/stack_map_test.cc
@@ -29,14 +29,13 @@
 // to the given bit vector. Returns true if they are same.
 static bool CheckStackMask(
     const CodeInfo& code_info,
-    const CodeInfoEncoding& encoding,
     const StackMap& stack_map,
     const BitVector& bit_vector) {
-  BitMemoryRegion stack_mask = code_info.GetStackMaskOf(encoding, stack_map);
-  if (bit_vector.GetNumberOfBits() > encoding.stack_mask.encoding.BitSize()) {
+  BitMemoryRegion stack_mask = code_info.GetStackMaskOf(stack_map);
+  if (bit_vector.GetNumberOfBits() > code_info.GetNumberOfStackMaskBits()) {
     return false;
   }
-  for (size_t i = 0; i < encoding.stack_mask.encoding.BitSize(); ++i) {
+  for (size_t i = 0; i < code_info.GetNumberOfStackMaskBits(); ++i) {
     if (stack_mask.LoadBit(i) != bit_vector.IsBitSet(i)) {
       return false;
     }
@@ -65,30 +64,29 @@
   stream.FillInCodeInfo(region);
 
   CodeInfo code_info(region);
-  CodeInfoEncoding encoding = code_info.ExtractEncoding();
-  ASSERT_EQ(1u, code_info.GetNumberOfStackMaps(encoding));
+  ASSERT_EQ(1u, code_info.GetNumberOfStackMaps());
 
-  uint32_t number_of_catalog_entries = code_info.GetNumberOfLocationCatalogEntries(encoding);
+  uint32_t number_of_catalog_entries = code_info.GetNumberOfLocationCatalogEntries();
   ASSERT_EQ(2u, number_of_catalog_entries);
-  DexRegisterLocationCatalog location_catalog = code_info.GetDexRegisterLocationCatalog(encoding);
+  DexRegisterLocationCatalog location_catalog = code_info.GetDexRegisterLocationCatalog();
   // The Dex register location catalog contains:
   // - one 1-byte short Dex register location, and
   // - one 5-byte large Dex register location.
   size_t expected_location_catalog_size = 1u + 5u;
   ASSERT_EQ(expected_location_catalog_size, location_catalog.Size());
 
-  StackMap stack_map = code_info.GetStackMapAt(0, encoding);
-  ASSERT_TRUE(stack_map.Equals(code_info.GetStackMapForDexPc(0, encoding)));
-  ASSERT_TRUE(stack_map.Equals(code_info.GetStackMapForNativePcOffset(64, encoding)));
-  ASSERT_EQ(0u, stack_map.GetDexPc(encoding.stack_map.encoding));
-  ASSERT_EQ(64u, stack_map.GetNativePcOffset(encoding.stack_map.encoding, kRuntimeISA));
-  ASSERT_EQ(0x3u, code_info.GetRegisterMaskOf(encoding, stack_map));
+  StackMap stack_map = code_info.GetStackMapAt(0);
+  ASSERT_TRUE(stack_map.Equals(code_info.GetStackMapForDexPc(0)));
+  ASSERT_TRUE(stack_map.Equals(code_info.GetStackMapForNativePcOffset(64)));
+  ASSERT_EQ(0u, stack_map.GetDexPc());
+  ASSERT_EQ(64u, stack_map.GetNativePcOffset(kRuntimeISA));
+  ASSERT_EQ(0x3u, code_info.GetRegisterMaskOf(stack_map));
 
-  ASSERT_TRUE(CheckStackMask(code_info, encoding, stack_map, sp_mask));
+  ASSERT_TRUE(CheckStackMask(code_info, stack_map, sp_mask));
 
-  ASSERT_TRUE(stack_map.HasDexRegisterMap(encoding.stack_map.encoding));
+  ASSERT_TRUE(stack_map.HasDexRegisterMap());
   DexRegisterMap dex_register_map =
-      code_info.GetDexRegisterMapOf(stack_map, encoding, number_of_dex_registers);
+      code_info.GetDexRegisterMapOf(stack_map, number_of_dex_registers);
   ASSERT_TRUE(dex_register_map.IsDexRegisterLive(0));
   ASSERT_TRUE(dex_register_map.IsDexRegisterLive(1));
   ASSERT_EQ(2u, dex_register_map.GetNumberOfLiveDexRegisters(number_of_dex_registers));
@@ -99,16 +97,16 @@
   ASSERT_EQ(expected_dex_register_map_size, dex_register_map.Size());
 
   ASSERT_EQ(Kind::kInStack, dex_register_map.GetLocationKind(
-                0, number_of_dex_registers, code_info, encoding));
+                0, number_of_dex_registers, code_info));
   ASSERT_EQ(Kind::kConstant, dex_register_map.GetLocationKind(
-                1, number_of_dex_registers, code_info, encoding));
+                1, number_of_dex_registers, code_info));
   ASSERT_EQ(Kind::kInStack, dex_register_map.GetLocationInternalKind(
-                0, number_of_dex_registers, code_info, encoding));
+                0, number_of_dex_registers, code_info));
   ASSERT_EQ(Kind::kConstantLargeValue, dex_register_map.GetLocationInternalKind(
-                1, number_of_dex_registers, code_info, encoding));
+                1, number_of_dex_registers, code_info));
   ASSERT_EQ(0, dex_register_map.GetStackOffsetInBytes(
-                0, number_of_dex_registers, code_info, encoding));
-  ASSERT_EQ(-2, dex_register_map.GetConstant(1, number_of_dex_registers, code_info, encoding));
+                0, number_of_dex_registers, code_info));
+  ASSERT_EQ(-2, dex_register_map.GetConstant(1, number_of_dex_registers, code_info));
 
   size_t index0 = dex_register_map.GetLocationCatalogEntryIndex(
       0, number_of_dex_registers, number_of_catalog_entries);
@@ -125,7 +123,7 @@
   ASSERT_EQ(0, location0.GetValue());
   ASSERT_EQ(-2, location1.GetValue());
 
-  ASSERT_FALSE(stack_map.HasInlineInfo(encoding.stack_map.encoding));
+  ASSERT_FALSE(stack_map.HasInlineInfo());
 }
 
 TEST(StackMapTest, Test2) {
@@ -179,12 +177,11 @@
   stream.FillInCodeInfo(region);
 
   CodeInfo code_info(region);
-  CodeInfoEncoding encoding = code_info.ExtractEncoding();
-  ASSERT_EQ(4u, code_info.GetNumberOfStackMaps(encoding));
+  ASSERT_EQ(4u, code_info.GetNumberOfStackMaps());
 
-  uint32_t number_of_catalog_entries = code_info.GetNumberOfLocationCatalogEntries(encoding);
+  uint32_t number_of_catalog_entries = code_info.GetNumberOfLocationCatalogEntries();
   ASSERT_EQ(7u, number_of_catalog_entries);
-  DexRegisterLocationCatalog location_catalog = code_info.GetDexRegisterLocationCatalog(encoding);
+  DexRegisterLocationCatalog location_catalog = code_info.GetDexRegisterLocationCatalog();
   // The Dex register location catalog contains:
   // - six 1-byte short Dex register locations, and
   // - one 5-byte large Dex register location.
@@ -193,18 +190,18 @@
 
   // First stack map.
   {
-    StackMap stack_map = code_info.GetStackMapAt(0, encoding);
-    ASSERT_TRUE(stack_map.Equals(code_info.GetStackMapForDexPc(0, encoding)));
-    ASSERT_TRUE(stack_map.Equals(code_info.GetStackMapForNativePcOffset(64, encoding)));
-    ASSERT_EQ(0u, stack_map.GetDexPc(encoding.stack_map.encoding));
-    ASSERT_EQ(64u, stack_map.GetNativePcOffset(encoding.stack_map.encoding, kRuntimeISA));
-    ASSERT_EQ(0x3u, code_info.GetRegisterMaskOf(encoding, stack_map));
+    StackMap stack_map = code_info.GetStackMapAt(0);
+    ASSERT_TRUE(stack_map.Equals(code_info.GetStackMapForDexPc(0)));
+    ASSERT_TRUE(stack_map.Equals(code_info.GetStackMapForNativePcOffset(64)));
+    ASSERT_EQ(0u, stack_map.GetDexPc());
+    ASSERT_EQ(64u, stack_map.GetNativePcOffset(kRuntimeISA));
+    ASSERT_EQ(0x3u, code_info.GetRegisterMaskOf(stack_map));
 
-    ASSERT_TRUE(CheckStackMask(code_info, encoding, stack_map, sp_mask1));
+    ASSERT_TRUE(CheckStackMask(code_info, stack_map, sp_mask1));
 
-    ASSERT_TRUE(stack_map.HasDexRegisterMap(encoding.stack_map.encoding));
+    ASSERT_TRUE(stack_map.HasDexRegisterMap());
     DexRegisterMap dex_register_map =
-        code_info.GetDexRegisterMapOf(stack_map, encoding, number_of_dex_registers);
+        code_info.GetDexRegisterMapOf(stack_map, number_of_dex_registers);
     ASSERT_TRUE(dex_register_map.IsDexRegisterLive(0));
     ASSERT_TRUE(dex_register_map.IsDexRegisterLive(1));
     ASSERT_EQ(2u, dex_register_map.GetNumberOfLiveDexRegisters(number_of_dex_registers));
@@ -215,16 +212,16 @@
     ASSERT_EQ(expected_dex_register_map_size, dex_register_map.Size());
 
     ASSERT_EQ(Kind::kInStack, dex_register_map.GetLocationKind(
-                  0, number_of_dex_registers, code_info, encoding));
+                  0, number_of_dex_registers, code_info));
     ASSERT_EQ(Kind::kConstant, dex_register_map.GetLocationKind(
-                  1, number_of_dex_registers, code_info, encoding));
+                  1, number_of_dex_registers, code_info));
     ASSERT_EQ(Kind::kInStack, dex_register_map.GetLocationInternalKind(
-                  0, number_of_dex_registers, code_info, encoding));
+                  0, number_of_dex_registers, code_info));
     ASSERT_EQ(Kind::kConstantLargeValue, dex_register_map.GetLocationInternalKind(
-                  1, number_of_dex_registers, code_info, encoding));
+                  1, number_of_dex_registers, code_info));
     ASSERT_EQ(0, dex_register_map.GetStackOffsetInBytes(
-                  0, number_of_dex_registers, code_info, encoding));
-    ASSERT_EQ(-2, dex_register_map.GetConstant(1, number_of_dex_registers, code_info, encoding));
+                  0, number_of_dex_registers, code_info));
+    ASSERT_EQ(-2, dex_register_map.GetConstant(1, number_of_dex_registers, code_info));
 
     size_t index0 = dex_register_map.GetLocationCatalogEntryIndex(
         0, number_of_dex_registers, number_of_catalog_entries);
@@ -241,29 +238,29 @@
     ASSERT_EQ(0, location0.GetValue());
     ASSERT_EQ(-2, location1.GetValue());
 
-    ASSERT_TRUE(stack_map.HasInlineInfo(encoding.stack_map.encoding));
-    InlineInfo inline_info = code_info.GetInlineInfoOf(stack_map, encoding);
-    ASSERT_EQ(2u, inline_info.GetDepth(encoding.inline_info.encoding));
-    ASSERT_EQ(3u, inline_info.GetDexPcAtDepth(encoding.inline_info.encoding, 0));
-    ASSERT_EQ(2u, inline_info.GetDexPcAtDepth(encoding.inline_info.encoding, 1));
-    ASSERT_TRUE(inline_info.EncodesArtMethodAtDepth(encoding.inline_info.encoding, 0));
-    ASSERT_TRUE(inline_info.EncodesArtMethodAtDepth(encoding.inline_info.encoding, 1));
+    ASSERT_TRUE(stack_map.HasInlineInfo());
+    InlineInfo inline_info = code_info.GetInlineInfoOf(stack_map);
+    ASSERT_EQ(2u, inline_info.GetDepth());
+    ASSERT_EQ(3u, inline_info.GetDexPcAtDepth(0));
+    ASSERT_EQ(2u, inline_info.GetDexPcAtDepth(1));
+    ASSERT_TRUE(inline_info.EncodesArtMethodAtDepth(0));
+    ASSERT_TRUE(inline_info.EncodesArtMethodAtDepth(1));
   }
 
   // Second stack map.
   {
-    StackMap stack_map = code_info.GetStackMapAt(1, encoding);
-    ASSERT_TRUE(stack_map.Equals(code_info.GetStackMapForDexPc(1u, encoding)));
-    ASSERT_TRUE(stack_map.Equals(code_info.GetStackMapForNativePcOffset(128u, encoding)));
-    ASSERT_EQ(1u, stack_map.GetDexPc(encoding.stack_map.encoding));
-    ASSERT_EQ(128u, stack_map.GetNativePcOffset(encoding.stack_map.encoding, kRuntimeISA));
-    ASSERT_EQ(0xFFu, code_info.GetRegisterMaskOf(encoding, stack_map));
+    StackMap stack_map = code_info.GetStackMapAt(1);
+    ASSERT_TRUE(stack_map.Equals(code_info.GetStackMapForDexPc(1u)));
+    ASSERT_TRUE(stack_map.Equals(code_info.GetStackMapForNativePcOffset(128u)));
+    ASSERT_EQ(1u, stack_map.GetDexPc());
+    ASSERT_EQ(128u, stack_map.GetNativePcOffset(kRuntimeISA));
+    ASSERT_EQ(0xFFu, code_info.GetRegisterMaskOf(stack_map));
 
-    ASSERT_TRUE(CheckStackMask(code_info, encoding, stack_map, sp_mask2));
+    ASSERT_TRUE(CheckStackMask(code_info, stack_map, sp_mask2));
 
-    ASSERT_TRUE(stack_map.HasDexRegisterMap(encoding.stack_map.encoding));
+    ASSERT_TRUE(stack_map.HasDexRegisterMap());
     DexRegisterMap dex_register_map =
-        code_info.GetDexRegisterMapOf(stack_map, encoding, number_of_dex_registers);
+        code_info.GetDexRegisterMapOf(stack_map, number_of_dex_registers);
     ASSERT_TRUE(dex_register_map.IsDexRegisterLive(0));
     ASSERT_TRUE(dex_register_map.IsDexRegisterLive(1));
     ASSERT_EQ(2u, dex_register_map.GetNumberOfLiveDexRegisters(number_of_dex_registers));
@@ -274,17 +271,17 @@
     ASSERT_EQ(expected_dex_register_map_size, dex_register_map.Size());
 
     ASSERT_EQ(Kind::kInRegister, dex_register_map.GetLocationKind(
-                  0, number_of_dex_registers, code_info, encoding));
+                  0, number_of_dex_registers, code_info));
     ASSERT_EQ(Kind::kInFpuRegister, dex_register_map.GetLocationKind(
-                  1, number_of_dex_registers, code_info, encoding));
+                  1, number_of_dex_registers, code_info));
     ASSERT_EQ(Kind::kInRegister, dex_register_map.GetLocationInternalKind(
-                  0, number_of_dex_registers, code_info, encoding));
+                  0, number_of_dex_registers, code_info));
     ASSERT_EQ(Kind::kInFpuRegister, dex_register_map.GetLocationInternalKind(
-                  1, number_of_dex_registers, code_info, encoding));
+                  1, number_of_dex_registers, code_info));
     ASSERT_EQ(18, dex_register_map.GetMachineRegister(
-                  0, number_of_dex_registers, code_info, encoding));
+                  0, number_of_dex_registers, code_info));
     ASSERT_EQ(3, dex_register_map.GetMachineRegister(
-                  1, number_of_dex_registers, code_info, encoding));
+                  1, number_of_dex_registers, code_info));
 
     size_t index0 = dex_register_map.GetLocationCatalogEntryIndex(
         0, number_of_dex_registers, number_of_catalog_entries);
@@ -301,23 +298,23 @@
     ASSERT_EQ(18, location0.GetValue());
     ASSERT_EQ(3, location1.GetValue());
 
-    ASSERT_FALSE(stack_map.HasInlineInfo(encoding.stack_map.encoding));
+    ASSERT_FALSE(stack_map.HasInlineInfo());
   }
 
   // Third stack map.
   {
-    StackMap stack_map = code_info.GetStackMapAt(2, encoding);
-    ASSERT_TRUE(stack_map.Equals(code_info.GetStackMapForDexPc(2u, encoding)));
-    ASSERT_TRUE(stack_map.Equals(code_info.GetStackMapForNativePcOffset(192u, encoding)));
-    ASSERT_EQ(2u, stack_map.GetDexPc(encoding.stack_map.encoding));
-    ASSERT_EQ(192u, stack_map.GetNativePcOffset(encoding.stack_map.encoding, kRuntimeISA));
-    ASSERT_EQ(0xABu, code_info.GetRegisterMaskOf(encoding, stack_map));
+    StackMap stack_map = code_info.GetStackMapAt(2);
+    ASSERT_TRUE(stack_map.Equals(code_info.GetStackMapForDexPc(2u)));
+    ASSERT_TRUE(stack_map.Equals(code_info.GetStackMapForNativePcOffset(192u)));
+    ASSERT_EQ(2u, stack_map.GetDexPc());
+    ASSERT_EQ(192u, stack_map.GetNativePcOffset(kRuntimeISA));
+    ASSERT_EQ(0xABu, code_info.GetRegisterMaskOf(stack_map));
 
-    ASSERT_TRUE(CheckStackMask(code_info, encoding, stack_map, sp_mask3));
+    ASSERT_TRUE(CheckStackMask(code_info, stack_map, sp_mask3));
 
-    ASSERT_TRUE(stack_map.HasDexRegisterMap(encoding.stack_map.encoding));
+    ASSERT_TRUE(stack_map.HasDexRegisterMap());
     DexRegisterMap dex_register_map =
-        code_info.GetDexRegisterMapOf(stack_map, encoding, number_of_dex_registers);
+        code_info.GetDexRegisterMapOf(stack_map, number_of_dex_registers);
     ASSERT_TRUE(dex_register_map.IsDexRegisterLive(0));
     ASSERT_TRUE(dex_register_map.IsDexRegisterLive(1));
     ASSERT_EQ(2u, dex_register_map.GetNumberOfLiveDexRegisters(number_of_dex_registers));
@@ -328,17 +325,17 @@
     ASSERT_EQ(expected_dex_register_map_size, dex_register_map.Size());
 
     ASSERT_EQ(Kind::kInRegister, dex_register_map.GetLocationKind(
-                  0, number_of_dex_registers, code_info, encoding));
+                  0, number_of_dex_registers, code_info));
     ASSERT_EQ(Kind::kInRegisterHigh, dex_register_map.GetLocationKind(
-                  1, number_of_dex_registers, code_info, encoding));
+                  1, number_of_dex_registers, code_info));
     ASSERT_EQ(Kind::kInRegister, dex_register_map.GetLocationInternalKind(
-                  0, number_of_dex_registers, code_info, encoding));
+                  0, number_of_dex_registers, code_info));
     ASSERT_EQ(Kind::kInRegisterHigh, dex_register_map.GetLocationInternalKind(
-                  1, number_of_dex_registers, code_info, encoding));
+                  1, number_of_dex_registers, code_info));
     ASSERT_EQ(6, dex_register_map.GetMachineRegister(
-                  0, number_of_dex_registers, code_info, encoding));
+                  0, number_of_dex_registers, code_info));
     ASSERT_EQ(8, dex_register_map.GetMachineRegister(
-                  1, number_of_dex_registers, code_info, encoding));
+                  1, number_of_dex_registers, code_info));
 
     size_t index0 = dex_register_map.GetLocationCatalogEntryIndex(
         0, number_of_dex_registers, number_of_catalog_entries);
@@ -355,23 +352,23 @@
     ASSERT_EQ(6, location0.GetValue());
     ASSERT_EQ(8, location1.GetValue());
 
-    ASSERT_FALSE(stack_map.HasInlineInfo(encoding.stack_map.encoding));
+    ASSERT_FALSE(stack_map.HasInlineInfo());
   }
 
   // Fourth stack map.
   {
-    StackMap stack_map = code_info.GetStackMapAt(3, encoding);
-    ASSERT_TRUE(stack_map.Equals(code_info.GetStackMapForDexPc(3u, encoding)));
-    ASSERT_TRUE(stack_map.Equals(code_info.GetStackMapForNativePcOffset(256u, encoding)));
-    ASSERT_EQ(3u, stack_map.GetDexPc(encoding.stack_map.encoding));
-    ASSERT_EQ(256u, stack_map.GetNativePcOffset(encoding.stack_map.encoding, kRuntimeISA));
-    ASSERT_EQ(0xCDu, code_info.GetRegisterMaskOf(encoding, stack_map));
+    StackMap stack_map = code_info.GetStackMapAt(3);
+    ASSERT_TRUE(stack_map.Equals(code_info.GetStackMapForDexPc(3u)));
+    ASSERT_TRUE(stack_map.Equals(code_info.GetStackMapForNativePcOffset(256u)));
+    ASSERT_EQ(3u, stack_map.GetDexPc());
+    ASSERT_EQ(256u, stack_map.GetNativePcOffset(kRuntimeISA));
+    ASSERT_EQ(0xCDu, code_info.GetRegisterMaskOf(stack_map));
 
-    ASSERT_TRUE(CheckStackMask(code_info, encoding, stack_map, sp_mask4));
+    ASSERT_TRUE(CheckStackMask(code_info, stack_map, sp_mask4));
 
-    ASSERT_TRUE(stack_map.HasDexRegisterMap(encoding.stack_map.encoding));
+    ASSERT_TRUE(stack_map.HasDexRegisterMap());
     DexRegisterMap dex_register_map =
-        code_info.GetDexRegisterMapOf(stack_map, encoding, number_of_dex_registers);
+        code_info.GetDexRegisterMapOf(stack_map, number_of_dex_registers);
     ASSERT_TRUE(dex_register_map.IsDexRegisterLive(0));
     ASSERT_TRUE(dex_register_map.IsDexRegisterLive(1));
     ASSERT_EQ(2u, dex_register_map.GetNumberOfLiveDexRegisters(number_of_dex_registers));
@@ -382,17 +379,17 @@
     ASSERT_EQ(expected_dex_register_map_size, dex_register_map.Size());
 
     ASSERT_EQ(Kind::kInFpuRegister, dex_register_map.GetLocationKind(
-                  0, number_of_dex_registers, code_info, encoding));
+                  0, number_of_dex_registers, code_info));
     ASSERT_EQ(Kind::kInFpuRegisterHigh, dex_register_map.GetLocationKind(
-                  1, number_of_dex_registers, code_info, encoding));
+                  1, number_of_dex_registers, code_info));
     ASSERT_EQ(Kind::kInFpuRegister, dex_register_map.GetLocationInternalKind(
-                  0, number_of_dex_registers, code_info, encoding));
+                  0, number_of_dex_registers, code_info));
     ASSERT_EQ(Kind::kInFpuRegisterHigh, dex_register_map.GetLocationInternalKind(
-                  1, number_of_dex_registers, code_info, encoding));
+                  1, number_of_dex_registers, code_info));
     ASSERT_EQ(3, dex_register_map.GetMachineRegister(
-                  0, number_of_dex_registers, code_info, encoding));
+                  0, number_of_dex_registers, code_info));
     ASSERT_EQ(1, dex_register_map.GetMachineRegister(
-                  1, number_of_dex_registers, code_info, encoding));
+                  1, number_of_dex_registers, code_info));
 
     size_t index0 = dex_register_map.GetLocationCatalogEntryIndex(
         0, number_of_dex_registers, number_of_catalog_entries);
@@ -409,7 +406,7 @@
     ASSERT_EQ(3, location0.GetValue());
     ASSERT_EQ(1, location1.GetValue());
 
-    ASSERT_FALSE(stack_map.HasInlineInfo(encoding.stack_map.encoding));
+    ASSERT_FALSE(stack_map.HasInlineInfo());
   }
 }
 
@@ -440,12 +437,11 @@
   stream.FillInCodeInfo(region);
 
   CodeInfo code_info(region);
-  CodeInfoEncoding encoding = code_info.ExtractEncoding();
-  ASSERT_EQ(1u, code_info.GetNumberOfStackMaps(encoding));
+  ASSERT_EQ(1u, code_info.GetNumberOfStackMaps());
 
-  uint32_t number_of_catalog_entries = code_info.GetNumberOfLocationCatalogEntries(encoding);
+  uint32_t number_of_catalog_entries = code_info.GetNumberOfLocationCatalogEntries();
   ASSERT_EQ(2u, number_of_catalog_entries);
-  DexRegisterLocationCatalog location_catalog = code_info.GetDexRegisterLocationCatalog(encoding);
+  DexRegisterLocationCatalog location_catalog = code_info.GetDexRegisterLocationCatalog();
   // The Dex register location catalog contains:
   // - one 1-byte short Dex register locations, and
   // - one 5-byte large Dex register location.
@@ -454,17 +450,17 @@
 
   // First stack map.
   {
-    StackMap stack_map = code_info.GetStackMapAt(0, encoding);
-    ASSERT_TRUE(stack_map.Equals(code_info.GetStackMapForDexPc(0, encoding)));
-    ASSERT_TRUE(stack_map.Equals(code_info.GetStackMapForNativePcOffset(64, encoding)));
-    ASSERT_EQ(0u, stack_map.GetDexPc(encoding.stack_map.encoding));
-    ASSERT_EQ(64u, stack_map.GetNativePcOffset(encoding.stack_map.encoding, kRuntimeISA));
-    ASSERT_EQ(0x3u, code_info.GetRegisterMaskOf(encoding, stack_map));
+    StackMap stack_map = code_info.GetStackMapAt(0);
+    ASSERT_TRUE(stack_map.Equals(code_info.GetStackMapForDexPc(0)));
+    ASSERT_TRUE(stack_map.Equals(code_info.GetStackMapForNativePcOffset(64)));
+    ASSERT_EQ(0u, stack_map.GetDexPc());
+    ASSERT_EQ(64u, stack_map.GetNativePcOffset(kRuntimeISA));
+    ASSERT_EQ(0x3u, code_info.GetRegisterMaskOf(stack_map));
 
-    ASSERT_TRUE(CheckStackMask(code_info, encoding, stack_map, sp_mask1));
+    ASSERT_TRUE(CheckStackMask(code_info, stack_map, sp_mask1));
 
-    ASSERT_TRUE(stack_map.HasDexRegisterMap(encoding.stack_map.encoding));
-    DexRegisterMap map(code_info.GetDexRegisterMapOf(stack_map, encoding, number_of_dex_registers));
+    ASSERT_TRUE(stack_map.HasDexRegisterMap());
+    DexRegisterMap map(code_info.GetDexRegisterMapOf(stack_map, number_of_dex_registers));
     ASSERT_TRUE(map.IsDexRegisterLive(0));
     ASSERT_TRUE(map.IsDexRegisterLive(1));
     ASSERT_EQ(2u, map.GetNumberOfLiveDexRegisters(number_of_dex_registers));
@@ -474,15 +470,15 @@
     size_t expected_map_size = 1u + 1u;
     ASSERT_EQ(expected_map_size, map.Size());
 
-    ASSERT_EQ(Kind::kInStack, map.GetLocationKind(0, number_of_dex_registers, code_info, encoding));
+    ASSERT_EQ(Kind::kInStack, map.GetLocationKind(0, number_of_dex_registers, code_info));
     ASSERT_EQ(Kind::kConstant,
-              map.GetLocationKind(1, number_of_dex_registers, code_info, encoding));
+              map.GetLocationKind(1, number_of_dex_registers, code_info));
     ASSERT_EQ(Kind::kInStack,
-              map.GetLocationInternalKind(0, number_of_dex_registers, code_info, encoding));
+              map.GetLocationInternalKind(0, number_of_dex_registers, code_info));
     ASSERT_EQ(Kind::kConstantLargeValue,
-              map.GetLocationInternalKind(1, number_of_dex_registers, code_info, encoding));
-    ASSERT_EQ(0, map.GetStackOffsetInBytes(0, number_of_dex_registers, code_info, encoding));
-    ASSERT_EQ(-2, map.GetConstant(1, number_of_dex_registers, code_info, encoding));
+              map.GetLocationInternalKind(1, number_of_dex_registers, code_info));
+    ASSERT_EQ(0, map.GetStackOffsetInBytes(0, number_of_dex_registers, code_info));
+    ASSERT_EQ(-2, map.GetConstant(1, number_of_dex_registers, code_info));
 
     const size_t index0 =
         map.GetLocationCatalogEntryIndex(0, number_of_dex_registers, number_of_catalog_entries);
@@ -501,10 +497,10 @@
 
     // Test that the inline info dex register map deduplicated to the same offset as the stack map
     // one.
-    ASSERT_TRUE(stack_map.HasInlineInfo(encoding.stack_map.encoding));
-    InlineInfo inline_info = code_info.GetInlineInfoOf(stack_map, encoding);
-    EXPECT_EQ(inline_info.GetDexRegisterMapOffsetAtDepth(encoding.inline_info.encoding, 0),
-              stack_map.GetDexRegisterMapOffset(encoding.stack_map.encoding));
+    ASSERT_TRUE(stack_map.HasInlineInfo());
+    InlineInfo inline_info = code_info.GetInlineInfoOf(stack_map);
+    EXPECT_EQ(inline_info.GetDexRegisterMapOffsetAtDepth(0),
+              stack_map.GetDexRegisterMapOffset());
   }
 }
 
@@ -527,27 +523,26 @@
   stream.FillInCodeInfo(region);
 
   CodeInfo code_info(region);
-  CodeInfoEncoding encoding = code_info.ExtractEncoding();
-  ASSERT_EQ(1u, code_info.GetNumberOfStackMaps(encoding));
+  ASSERT_EQ(1u, code_info.GetNumberOfStackMaps());
 
-  uint32_t number_of_catalog_entries = code_info.GetNumberOfLocationCatalogEntries(encoding);
+  uint32_t number_of_catalog_entries = code_info.GetNumberOfLocationCatalogEntries();
   ASSERT_EQ(1u, number_of_catalog_entries);
-  DexRegisterLocationCatalog location_catalog = code_info.GetDexRegisterLocationCatalog(encoding);
+  DexRegisterLocationCatalog location_catalog = code_info.GetDexRegisterLocationCatalog();
   // The Dex register location catalog contains:
   // - one 5-byte large Dex register location.
   size_t expected_location_catalog_size = 5u;
   ASSERT_EQ(expected_location_catalog_size, location_catalog.Size());
 
-  StackMap stack_map = code_info.GetStackMapAt(0, encoding);
-  ASSERT_TRUE(stack_map.Equals(code_info.GetStackMapForDexPc(0, encoding)));
-  ASSERT_TRUE(stack_map.Equals(code_info.GetStackMapForNativePcOffset(64, encoding)));
-  ASSERT_EQ(0u, stack_map.GetDexPc(encoding.stack_map.encoding));
-  ASSERT_EQ(64u, stack_map.GetNativePcOffset(encoding.stack_map.encoding, kRuntimeISA));
-  ASSERT_EQ(0x3u, code_info.GetRegisterMaskOf(encoding, stack_map));
+  StackMap stack_map = code_info.GetStackMapAt(0);
+  ASSERT_TRUE(stack_map.Equals(code_info.GetStackMapForDexPc(0)));
+  ASSERT_TRUE(stack_map.Equals(code_info.GetStackMapForNativePcOffset(64)));
+  ASSERT_EQ(0u, stack_map.GetDexPc());
+  ASSERT_EQ(64u, stack_map.GetNativePcOffset(kRuntimeISA));
+  ASSERT_EQ(0x3u, code_info.GetRegisterMaskOf(stack_map));
 
-  ASSERT_TRUE(stack_map.HasDexRegisterMap(encoding.stack_map.encoding));
+  ASSERT_TRUE(stack_map.HasDexRegisterMap());
   DexRegisterMap dex_register_map =
-      code_info.GetDexRegisterMapOf(stack_map, encoding, number_of_dex_registers);
+      code_info.GetDexRegisterMapOf(stack_map, number_of_dex_registers);
   ASSERT_FALSE(dex_register_map.IsDexRegisterLive(0));
   ASSERT_TRUE(dex_register_map.IsDexRegisterLive(1));
   ASSERT_EQ(1u, dex_register_map.GetNumberOfLiveDexRegisters(number_of_dex_registers));
@@ -558,14 +553,14 @@
   ASSERT_EQ(expected_dex_register_map_size, dex_register_map.Size());
 
   ASSERT_EQ(Kind::kNone, dex_register_map.GetLocationKind(
-                0, number_of_dex_registers, code_info, encoding));
+                0, number_of_dex_registers, code_info));
   ASSERT_EQ(Kind::kConstant, dex_register_map.GetLocationKind(
-                1, number_of_dex_registers, code_info, encoding));
+                1, number_of_dex_registers, code_info));
   ASSERT_EQ(Kind::kNone, dex_register_map.GetLocationInternalKind(
-                0, number_of_dex_registers, code_info, encoding));
+                0, number_of_dex_registers, code_info));
   ASSERT_EQ(Kind::kConstantLargeValue, dex_register_map.GetLocationInternalKind(
-                1, number_of_dex_registers, code_info, encoding));
-  ASSERT_EQ(-2, dex_register_map.GetConstant(1, number_of_dex_registers, code_info, encoding));
+                1, number_of_dex_registers, code_info));
+  ASSERT_EQ(-2, dex_register_map.GetConstant(1, number_of_dex_registers, code_info));
 
   size_t index0 = dex_register_map.GetLocationCatalogEntryIndex(
       0, number_of_dex_registers, number_of_catalog_entries);
@@ -582,7 +577,7 @@
   ASSERT_EQ(0, location0.GetValue());
   ASSERT_EQ(-2, location1.GetValue());
 
-  ASSERT_FALSE(stack_map.HasInlineInfo(encoding.stack_map.encoding));
+  ASSERT_FALSE(stack_map.HasInlineInfo());
 }
 
 // Generate a stack map whose dex register offset is
@@ -620,11 +615,10 @@
   stream.FillInCodeInfo(region);
 
   CodeInfo code_info(region);
-  CodeInfoEncoding encoding = code_info.ExtractEncoding();
   // The location catalog contains two entries (DexRegisterLocation(kConstant, 0)
   // and DexRegisterLocation(kConstant, 1)), therefore the location catalog index
   // has a size of 1 bit.
-  uint32_t number_of_catalog_entries = code_info.GetNumberOfLocationCatalogEntries(encoding);
+  uint32_t number_of_catalog_entries = code_info.GetNumberOfLocationCatalogEntries();
   ASSERT_EQ(2u, number_of_catalog_entries);
   ASSERT_EQ(1u, DexRegisterMap::SingleEntrySizeInBits(number_of_catalog_entries));
 
@@ -635,21 +629,21 @@
   //   locations (that is, 127 bytes of data).
   // Hence it has a size of 255 bytes, and therefore...
   ASSERT_EQ(128u, DexRegisterMap::GetLiveBitMaskSize(number_of_dex_registers));
-  StackMap stack_map0 = code_info.GetStackMapAt(0, encoding);
+  StackMap stack_map0 = code_info.GetStackMapAt(0);
   DexRegisterMap dex_register_map0 =
-      code_info.GetDexRegisterMapOf(stack_map0, encoding, number_of_dex_registers);
+      code_info.GetDexRegisterMapOf(stack_map0, number_of_dex_registers);
   ASSERT_EQ(127u, dex_register_map0.GetLocationMappingDataSize(number_of_dex_registers,
                                                                number_of_catalog_entries));
   ASSERT_EQ(255u, dex_register_map0.Size());
 
-  StackMap stack_map1 = code_info.GetStackMapAt(1, encoding);
-  ASSERT_TRUE(stack_map1.HasDexRegisterMap(encoding.stack_map.encoding));
+  StackMap stack_map1 = code_info.GetStackMapAt(1);
+  ASSERT_TRUE(stack_map1.HasDexRegisterMap());
   // ...the offset of the second Dex register map (relative to the
   // beginning of the Dex register maps region) is 255 (i.e.,
   // kNoDexRegisterMapSmallEncoding).
-  ASSERT_NE(stack_map1.GetDexRegisterMapOffset(encoding.stack_map.encoding),
-            StackMap::kNoDexRegisterMap);
-  ASSERT_EQ(stack_map1.GetDexRegisterMapOffset(encoding.stack_map.encoding), 0xFFu);
+  ASSERT_NE(stack_map1.GetDexRegisterMapOffset(),
+            StackMap::kNoValue);
+  ASSERT_EQ(stack_map1.GetDexRegisterMapOffset(), 0xFFu);
 }
 
 TEST(StackMapTest, TestShareDexRegisterMap) {
@@ -682,33 +676,32 @@
   stream.FillInCodeInfo(region);
 
   CodeInfo ci(region);
-  CodeInfoEncoding encoding = ci.ExtractEncoding();
 
   // Verify first stack map.
-  StackMap sm0 = ci.GetStackMapAt(0, encoding);
-  DexRegisterMap dex_registers0 = ci.GetDexRegisterMapOf(sm0, encoding, number_of_dex_registers);
-  ASSERT_EQ(0, dex_registers0.GetMachineRegister(0, number_of_dex_registers, ci, encoding));
-  ASSERT_EQ(-2, dex_registers0.GetConstant(1, number_of_dex_registers, ci, encoding));
+  StackMap sm0 = ci.GetStackMapAt(0);
+  DexRegisterMap dex_registers0 = ci.GetDexRegisterMapOf(sm0, number_of_dex_registers);
+  ASSERT_EQ(0, dex_registers0.GetMachineRegister(0, number_of_dex_registers, ci));
+  ASSERT_EQ(-2, dex_registers0.GetConstant(1, number_of_dex_registers, ci));
 
   // Verify second stack map.
-  StackMap sm1 = ci.GetStackMapAt(1, encoding);
-  DexRegisterMap dex_registers1 = ci.GetDexRegisterMapOf(sm1, encoding, number_of_dex_registers);
-  ASSERT_EQ(0, dex_registers1.GetMachineRegister(0, number_of_dex_registers, ci, encoding));
-  ASSERT_EQ(-2, dex_registers1.GetConstant(1, number_of_dex_registers, ci, encoding));
+  StackMap sm1 = ci.GetStackMapAt(1);
+  DexRegisterMap dex_registers1 = ci.GetDexRegisterMapOf(sm1, number_of_dex_registers);
+  ASSERT_EQ(0, dex_registers1.GetMachineRegister(0, number_of_dex_registers, ci));
+  ASSERT_EQ(-2, dex_registers1.GetConstant(1, number_of_dex_registers, ci));
 
   // Verify third stack map.
-  StackMap sm2 = ci.GetStackMapAt(2, encoding);
-  DexRegisterMap dex_registers2 = ci.GetDexRegisterMapOf(sm2, encoding, number_of_dex_registers);
-  ASSERT_EQ(2, dex_registers2.GetMachineRegister(0, number_of_dex_registers, ci, encoding));
-  ASSERT_EQ(-2, dex_registers2.GetConstant(1, number_of_dex_registers, ci, encoding));
+  StackMap sm2 = ci.GetStackMapAt(2);
+  DexRegisterMap dex_registers2 = ci.GetDexRegisterMapOf(sm2, number_of_dex_registers);
+  ASSERT_EQ(2, dex_registers2.GetMachineRegister(0, number_of_dex_registers, ci));
+  ASSERT_EQ(-2, dex_registers2.GetConstant(1, number_of_dex_registers, ci));
 
   // Verify dex register map offsets.
-  ASSERT_EQ(sm0.GetDexRegisterMapOffset(encoding.stack_map.encoding),
-            sm1.GetDexRegisterMapOffset(encoding.stack_map.encoding));
-  ASSERT_NE(sm0.GetDexRegisterMapOffset(encoding.stack_map.encoding),
-            sm2.GetDexRegisterMapOffset(encoding.stack_map.encoding));
-  ASSERT_NE(sm1.GetDexRegisterMapOffset(encoding.stack_map.encoding),
-            sm2.GetDexRegisterMapOffset(encoding.stack_map.encoding));
+  ASSERT_EQ(sm0.GetDexRegisterMapOffset(),
+            sm1.GetDexRegisterMapOffset());
+  ASSERT_NE(sm0.GetDexRegisterMapOffset(),
+            sm2.GetDexRegisterMapOffset());
+  ASSERT_NE(sm1.GetDexRegisterMapOffset(),
+            sm2.GetDexRegisterMapOffset());
 }
 
 TEST(StackMapTest, TestNoDexRegisterMap) {
@@ -732,33 +725,32 @@
   stream.FillInCodeInfo(region);
 
   CodeInfo code_info(region);
-  CodeInfoEncoding encoding = code_info.ExtractEncoding();
-  ASSERT_EQ(2u, code_info.GetNumberOfStackMaps(encoding));
+  ASSERT_EQ(2u, code_info.GetNumberOfStackMaps());
 
-  uint32_t number_of_catalog_entries = code_info.GetNumberOfLocationCatalogEntries(encoding);
+  uint32_t number_of_catalog_entries = code_info.GetNumberOfLocationCatalogEntries();
   ASSERT_EQ(0u, number_of_catalog_entries);
-  DexRegisterLocationCatalog location_catalog = code_info.GetDexRegisterLocationCatalog(encoding);
+  DexRegisterLocationCatalog location_catalog = code_info.GetDexRegisterLocationCatalog();
   ASSERT_EQ(0u, location_catalog.Size());
 
-  StackMap stack_map = code_info.GetStackMapAt(0, encoding);
-  ASSERT_TRUE(stack_map.Equals(code_info.GetStackMapForDexPc(0, encoding)));
-  ASSERT_TRUE(stack_map.Equals(code_info.GetStackMapForNativePcOffset(64, encoding)));
-  ASSERT_EQ(0u, stack_map.GetDexPc(encoding.stack_map.encoding));
-  ASSERT_EQ(64u, stack_map.GetNativePcOffset(encoding.stack_map.encoding, kRuntimeISA));
-  ASSERT_EQ(0x3u, code_info.GetRegisterMaskOf(encoding, stack_map));
+  StackMap stack_map = code_info.GetStackMapAt(0);
+  ASSERT_TRUE(stack_map.Equals(code_info.GetStackMapForDexPc(0)));
+  ASSERT_TRUE(stack_map.Equals(code_info.GetStackMapForNativePcOffset(64)));
+  ASSERT_EQ(0u, stack_map.GetDexPc());
+  ASSERT_EQ(64u, stack_map.GetNativePcOffset(kRuntimeISA));
+  ASSERT_EQ(0x3u, code_info.GetRegisterMaskOf(stack_map));
 
-  ASSERT_FALSE(stack_map.HasDexRegisterMap(encoding.stack_map.encoding));
-  ASSERT_FALSE(stack_map.HasInlineInfo(encoding.stack_map.encoding));
+  ASSERT_FALSE(stack_map.HasDexRegisterMap());
+  ASSERT_FALSE(stack_map.HasInlineInfo());
 
-  stack_map = code_info.GetStackMapAt(1, encoding);
-  ASSERT_TRUE(stack_map.Equals(code_info.GetStackMapForDexPc(1, encoding)));
-  ASSERT_TRUE(stack_map.Equals(code_info.GetStackMapForNativePcOffset(68, encoding)));
-  ASSERT_EQ(1u, stack_map.GetDexPc(encoding.stack_map.encoding));
-  ASSERT_EQ(68u, stack_map.GetNativePcOffset(encoding.stack_map.encoding, kRuntimeISA));
-  ASSERT_EQ(0x4u, code_info.GetRegisterMaskOf(encoding, stack_map));
+  stack_map = code_info.GetStackMapAt(1);
+  ASSERT_TRUE(stack_map.Equals(code_info.GetStackMapForDexPc(1)));
+  ASSERT_TRUE(stack_map.Equals(code_info.GetStackMapForNativePcOffset(68)));
+  ASSERT_EQ(1u, stack_map.GetDexPc());
+  ASSERT_EQ(68u, stack_map.GetNativePcOffset(kRuntimeISA));
+  ASSERT_EQ(0x4u, code_info.GetRegisterMaskOf(stack_map));
 
-  ASSERT_FALSE(stack_map.HasDexRegisterMap(encoding.stack_map.encoding));
-  ASSERT_FALSE(stack_map.HasInlineInfo(encoding.stack_map.encoding));
+  ASSERT_FALSE(stack_map.HasDexRegisterMap());
+  ASSERT_FALSE(stack_map.HasInlineInfo());
 }
 
 TEST(StackMapTest, InlineTest) {
@@ -835,100 +827,99 @@
   stream.FillInCodeInfo(region);
 
   CodeInfo ci(region);
-  CodeInfoEncoding encoding = ci.ExtractEncoding();
 
   {
     // Verify first stack map.
-    StackMap sm0 = ci.GetStackMapAt(0, encoding);
+    StackMap sm0 = ci.GetStackMapAt(0);
 
-    DexRegisterMap dex_registers0 = ci.GetDexRegisterMapOf(sm0, encoding, 2);
-    ASSERT_EQ(0, dex_registers0.GetStackOffsetInBytes(0, 2, ci, encoding));
-    ASSERT_EQ(4, dex_registers0.GetConstant(1, 2, ci, encoding));
+    DexRegisterMap dex_registers0 = ci.GetDexRegisterMapOf(sm0, 2);
+    ASSERT_EQ(0, dex_registers0.GetStackOffsetInBytes(0, 2, ci));
+    ASSERT_EQ(4, dex_registers0.GetConstant(1, 2, ci));
 
-    InlineInfo if0 = ci.GetInlineInfoOf(sm0, encoding);
-    ASSERT_EQ(2u, if0.GetDepth(encoding.inline_info.encoding));
-    ASSERT_EQ(2u, if0.GetDexPcAtDepth(encoding.inline_info.encoding, 0));
-    ASSERT_TRUE(if0.EncodesArtMethodAtDepth(encoding.inline_info.encoding, 0));
-    ASSERT_EQ(3u, if0.GetDexPcAtDepth(encoding.inline_info.encoding, 1));
-    ASSERT_TRUE(if0.EncodesArtMethodAtDepth(encoding.inline_info.encoding, 1));
+    InlineInfo if0 = ci.GetInlineInfoOf(sm0);
+    ASSERT_EQ(2u, if0.GetDepth());
+    ASSERT_EQ(2u, if0.GetDexPcAtDepth(0));
+    ASSERT_TRUE(if0.EncodesArtMethodAtDepth(0));
+    ASSERT_EQ(3u, if0.GetDexPcAtDepth(1));
+    ASSERT_TRUE(if0.EncodesArtMethodAtDepth(1));
 
-    DexRegisterMap dex_registers1 = ci.GetDexRegisterMapAtDepth(0, if0, encoding, 1);
-    ASSERT_EQ(8, dex_registers1.GetStackOffsetInBytes(0, 1, ci, encoding));
+    DexRegisterMap dex_registers1 = ci.GetDexRegisterMapAtDepth(0, if0, 1);
+    ASSERT_EQ(8, dex_registers1.GetStackOffsetInBytes(0, 1, ci));
 
-    DexRegisterMap dex_registers2 = ci.GetDexRegisterMapAtDepth(1, if0, encoding, 3);
-    ASSERT_EQ(16, dex_registers2.GetStackOffsetInBytes(0, 3, ci, encoding));
-    ASSERT_EQ(20, dex_registers2.GetConstant(1, 3, ci, encoding));
-    ASSERT_EQ(15, dex_registers2.GetMachineRegister(2, 3, ci, encoding));
+    DexRegisterMap dex_registers2 = ci.GetDexRegisterMapAtDepth(1, if0, 3);
+    ASSERT_EQ(16, dex_registers2.GetStackOffsetInBytes(0, 3, ci));
+    ASSERT_EQ(20, dex_registers2.GetConstant(1, 3, ci));
+    ASSERT_EQ(15, dex_registers2.GetMachineRegister(2, 3, ci));
   }
 
   {
     // Verify second stack map.
-    StackMap sm1 = ci.GetStackMapAt(1, encoding);
+    StackMap sm1 = ci.GetStackMapAt(1);
 
-    DexRegisterMap dex_registers0 = ci.GetDexRegisterMapOf(sm1, encoding, 2);
-    ASSERT_EQ(56, dex_registers0.GetStackOffsetInBytes(0, 2, ci, encoding));
-    ASSERT_EQ(0, dex_registers0.GetConstant(1, 2, ci, encoding));
+    DexRegisterMap dex_registers0 = ci.GetDexRegisterMapOf(sm1, 2);
+    ASSERT_EQ(56, dex_registers0.GetStackOffsetInBytes(0, 2, ci));
+    ASSERT_EQ(0, dex_registers0.GetConstant(1, 2, ci));
 
-    InlineInfo if1 = ci.GetInlineInfoOf(sm1, encoding);
-    ASSERT_EQ(3u, if1.GetDepth(encoding.inline_info.encoding));
-    ASSERT_EQ(2u, if1.GetDexPcAtDepth(encoding.inline_info.encoding, 0));
-    ASSERT_TRUE(if1.EncodesArtMethodAtDepth(encoding.inline_info.encoding, 0));
-    ASSERT_EQ(3u, if1.GetDexPcAtDepth(encoding.inline_info.encoding, 1));
-    ASSERT_TRUE(if1.EncodesArtMethodAtDepth(encoding.inline_info.encoding, 1));
-    ASSERT_EQ(5u, if1.GetDexPcAtDepth(encoding.inline_info.encoding, 2));
-    ASSERT_TRUE(if1.EncodesArtMethodAtDepth(encoding.inline_info.encoding, 2));
+    InlineInfo if1 = ci.GetInlineInfoOf(sm1);
+    ASSERT_EQ(3u, if1.GetDepth());
+    ASSERT_EQ(2u, if1.GetDexPcAtDepth(0));
+    ASSERT_TRUE(if1.EncodesArtMethodAtDepth(0));
+    ASSERT_EQ(3u, if1.GetDexPcAtDepth(1));
+    ASSERT_TRUE(if1.EncodesArtMethodAtDepth(1));
+    ASSERT_EQ(5u, if1.GetDexPcAtDepth(2));
+    ASSERT_TRUE(if1.EncodesArtMethodAtDepth(2));
 
-    DexRegisterMap dex_registers1 = ci.GetDexRegisterMapAtDepth(0, if1, encoding, 1);
-    ASSERT_EQ(12, dex_registers1.GetStackOffsetInBytes(0, 1, ci, encoding));
+    DexRegisterMap dex_registers1 = ci.GetDexRegisterMapAtDepth(0, if1, 1);
+    ASSERT_EQ(12, dex_registers1.GetStackOffsetInBytes(0, 1, ci));
 
-    DexRegisterMap dex_registers2 = ci.GetDexRegisterMapAtDepth(1, if1, encoding, 3);
-    ASSERT_EQ(80, dex_registers2.GetStackOffsetInBytes(0, 3, ci, encoding));
-    ASSERT_EQ(10, dex_registers2.GetConstant(1, 3, ci, encoding));
-    ASSERT_EQ(5, dex_registers2.GetMachineRegister(2, 3, ci, encoding));
+    DexRegisterMap dex_registers2 = ci.GetDexRegisterMapAtDepth(1, if1, 3);
+    ASSERT_EQ(80, dex_registers2.GetStackOffsetInBytes(0, 3, ci));
+    ASSERT_EQ(10, dex_registers2.GetConstant(1, 3, ci));
+    ASSERT_EQ(5, dex_registers2.GetMachineRegister(2, 3, ci));
 
-    ASSERT_FALSE(if1.HasDexRegisterMapAtDepth(encoding.inline_info.encoding, 2));
+    ASSERT_FALSE(if1.HasDexRegisterMapAtDepth(2));
   }
 
   {
     // Verify third stack map.
-    StackMap sm2 = ci.GetStackMapAt(2, encoding);
+    StackMap sm2 = ci.GetStackMapAt(2);
 
-    DexRegisterMap dex_registers0 = ci.GetDexRegisterMapOf(sm2, encoding, 2);
+    DexRegisterMap dex_registers0 = ci.GetDexRegisterMapOf(sm2, 2);
     ASSERT_FALSE(dex_registers0.IsDexRegisterLive(0));
-    ASSERT_EQ(4, dex_registers0.GetConstant(1, 2, ci, encoding));
-    ASSERT_FALSE(sm2.HasInlineInfo(encoding.stack_map.encoding));
+    ASSERT_EQ(4, dex_registers0.GetConstant(1, 2, ci));
+    ASSERT_FALSE(sm2.HasInlineInfo());
   }
 
   {
     // Verify fourth stack map.
-    StackMap sm3 = ci.GetStackMapAt(3, encoding);
+    StackMap sm3 = ci.GetStackMapAt(3);
 
-    DexRegisterMap dex_registers0 = ci.GetDexRegisterMapOf(sm3, encoding, 2);
-    ASSERT_EQ(56, dex_registers0.GetStackOffsetInBytes(0, 2, ci, encoding));
-    ASSERT_EQ(0, dex_registers0.GetConstant(1, 2, ci, encoding));
+    DexRegisterMap dex_registers0 = ci.GetDexRegisterMapOf(sm3, 2);
+    ASSERT_EQ(56, dex_registers0.GetStackOffsetInBytes(0, 2, ci));
+    ASSERT_EQ(0, dex_registers0.GetConstant(1, 2, ci));
 
-    InlineInfo if2 = ci.GetInlineInfoOf(sm3, encoding);
-    ASSERT_EQ(3u, if2.GetDepth(encoding.inline_info.encoding));
-    ASSERT_EQ(2u, if2.GetDexPcAtDepth(encoding.inline_info.encoding, 0));
-    ASSERT_TRUE(if2.EncodesArtMethodAtDepth(encoding.inline_info.encoding, 0));
-    ASSERT_EQ(5u, if2.GetDexPcAtDepth(encoding.inline_info.encoding, 1));
-    ASSERT_TRUE(if2.EncodesArtMethodAtDepth(encoding.inline_info.encoding, 1));
-    ASSERT_EQ(10u, if2.GetDexPcAtDepth(encoding.inline_info.encoding, 2));
-    ASSERT_TRUE(if2.EncodesArtMethodAtDepth(encoding.inline_info.encoding, 2));
+    InlineInfo if2 = ci.GetInlineInfoOf(sm3);
+    ASSERT_EQ(3u, if2.GetDepth());
+    ASSERT_EQ(2u, if2.GetDexPcAtDepth(0));
+    ASSERT_TRUE(if2.EncodesArtMethodAtDepth(0));
+    ASSERT_EQ(5u, if2.GetDexPcAtDepth(1));
+    ASSERT_TRUE(if2.EncodesArtMethodAtDepth(1));
+    ASSERT_EQ(10u, if2.GetDexPcAtDepth(2));
+    ASSERT_TRUE(if2.EncodesArtMethodAtDepth(2));
 
-    ASSERT_FALSE(if2.HasDexRegisterMapAtDepth(encoding.inline_info.encoding, 0));
+    ASSERT_FALSE(if2.HasDexRegisterMapAtDepth(0));
 
-    DexRegisterMap dex_registers1 = ci.GetDexRegisterMapAtDepth(1, if2, encoding, 1);
-    ASSERT_EQ(2, dex_registers1.GetMachineRegister(0, 1, ci, encoding));
+    DexRegisterMap dex_registers1 = ci.GetDexRegisterMapAtDepth(1, if2, 1);
+    ASSERT_EQ(2, dex_registers1.GetMachineRegister(0, 1, ci));
 
-    DexRegisterMap dex_registers2 = ci.GetDexRegisterMapAtDepth(2, if2, encoding, 2);
+    DexRegisterMap dex_registers2 = ci.GetDexRegisterMapAtDepth(2, if2, 2);
     ASSERT_FALSE(dex_registers2.IsDexRegisterLive(0));
-    ASSERT_EQ(3, dex_registers2.GetMachineRegister(1, 2, ci, encoding));
+    ASSERT_EQ(3, dex_registers2.GetMachineRegister(1, 2, ci));
   }
 }
 
 TEST(StackMapTest, CodeOffsetTest) {
-  // Test minimum alignments, encoding, and decoding.
+  // Test minimum alignments, and decoding.
   CodeOffset offset_thumb2 =
       CodeOffset::FromOffset(kThumb2InstructionAlignment, InstructionSet::kThumb2);
   CodeOffset offset_arm64 =
@@ -969,13 +960,12 @@
   stream.FillInCodeInfo(region);
 
   CodeInfo code_info(region);
-  CodeInfoEncoding encoding = code_info.ExtractEncoding();
-  ASSERT_EQ(2u, code_info.GetNumberOfStackMaps(encoding));
+  ASSERT_EQ(2u, code_info.GetNumberOfStackMaps());
 
-  StackMap stack_map1 = code_info.GetStackMapForNativePcOffset(4, encoding);
-  StackMap stack_map2 = code_info.GetStackMapForNativePcOffset(8, encoding);
-  EXPECT_EQ(stack_map1.GetStackMaskIndex(encoding.stack_map.encoding),
-            stack_map2.GetStackMaskIndex(encoding.stack_map.encoding));
+  StackMap stack_map1 = code_info.GetStackMapForNativePcOffset(4);
+  StackMap stack_map2 = code_info.GetStackMapForNativePcOffset(8);
+  EXPECT_EQ(stack_map1.GetStackMaskIndex(),
+            stack_map2.GetStackMaskIndex());
 }
 
 TEST(StackMapTest, TestInvokeInfo) {
@@ -1007,26 +997,25 @@
 
   CodeInfo code_info(code_info_region);
   MethodInfo method_info(method_info_region.begin());
-  CodeInfoEncoding encoding = code_info.ExtractEncoding();
-  ASSERT_EQ(3u, code_info.GetNumberOfStackMaps(encoding));
+  ASSERT_EQ(3u, code_info.GetNumberOfStackMaps());
 
-  InvokeInfo invoke1(code_info.GetInvokeInfoForNativePcOffset(4, encoding));
-  InvokeInfo invoke2(code_info.GetInvokeInfoForNativePcOffset(8, encoding));
-  InvokeInfo invoke3(code_info.GetInvokeInfoForNativePcOffset(16, encoding));
-  InvokeInfo invoke_invalid(code_info.GetInvokeInfoForNativePcOffset(12, encoding));
+  InvokeInfo invoke1(code_info.GetInvokeInfoForNativePcOffset(4));
+  InvokeInfo invoke2(code_info.GetInvokeInfoForNativePcOffset(8));
+  InvokeInfo invoke3(code_info.GetInvokeInfoForNativePcOffset(16));
+  InvokeInfo invoke_invalid(code_info.GetInvokeInfoForNativePcOffset(12));
   EXPECT_FALSE(invoke_invalid.IsValid());  // No entry for that index.
   EXPECT_TRUE(invoke1.IsValid());
   EXPECT_TRUE(invoke2.IsValid());
   EXPECT_TRUE(invoke3.IsValid());
-  EXPECT_EQ(invoke1.GetInvokeType(encoding.invoke_info.encoding), kSuper);
-  EXPECT_EQ(invoke1.GetMethodIndex(encoding.invoke_info.encoding, method_info), 1u);
-  EXPECT_EQ(invoke1.GetNativePcOffset(encoding.invoke_info.encoding, kRuntimeISA), 4u);
-  EXPECT_EQ(invoke2.GetInvokeType(encoding.invoke_info.encoding), kStatic);
-  EXPECT_EQ(invoke2.GetMethodIndex(encoding.invoke_info.encoding, method_info), 3u);
-  EXPECT_EQ(invoke2.GetNativePcOffset(encoding.invoke_info.encoding, kRuntimeISA), 8u);
-  EXPECT_EQ(invoke3.GetInvokeType(encoding.invoke_info.encoding), kDirect);
-  EXPECT_EQ(invoke3.GetMethodIndex(encoding.invoke_info.encoding, method_info), 65535u);
-  EXPECT_EQ(invoke3.GetNativePcOffset(encoding.invoke_info.encoding, kRuntimeISA), 16u);
+  EXPECT_EQ(invoke1.GetInvokeType(), kSuper);
+  EXPECT_EQ(invoke1.GetMethodIndex(method_info), 1u);
+  EXPECT_EQ(invoke1.GetNativePcOffset(kRuntimeISA), 4u);
+  EXPECT_EQ(invoke2.GetInvokeType(), kStatic);
+  EXPECT_EQ(invoke2.GetMethodIndex(method_info), 3u);
+  EXPECT_EQ(invoke2.GetNativePcOffset(kRuntimeISA), 8u);
+  EXPECT_EQ(invoke3.GetInvokeType(), kDirect);
+  EXPECT_EQ(invoke3.GetMethodIndex(method_info), 65535u);
+  EXPECT_EQ(invoke3.GetNativePcOffset(kRuntimeISA), 16u);
 }
 
 }  // namespace art
diff --git a/compiler/utils/x86/constants_x86.h b/compiler/utils/x86/constants_x86.h
index 73ef028..a782b16 100644
--- a/compiler/utils/x86/constants_x86.h
+++ b/compiler/utils/x86/constants_x86.h
@@ -40,21 +40,6 @@
   kNoByteRegister = -1  // Signals an illegal register.
 };
 
-
-enum XmmRegister {
-  XMM0 = 0,
-  XMM1 = 1,
-  XMM2 = 2,
-  XMM3 = 3,
-  XMM4 = 4,
-  XMM5 = 5,
-  XMM6 = 6,
-  XMM7 = 7,
-  kNumberOfXmmRegisters = 8,
-  kNoXmmRegister = -1  // Signals an illegal register.
-};
-std::ostream& operator<<(std::ostream& os, const XmmRegister& reg);
-
 enum X87Register {
   ST0 = 0,
   ST1 = 1,
diff --git a/compiler/verifier_deps_test.cc b/compiler/verifier_deps_test.cc
index 553d131..06f0bcd 100644
--- a/compiler/verifier_deps_test.cc
+++ b/compiler/verifier_deps_test.cc
@@ -236,6 +236,8 @@
         if (cls == nullptr) {
           CHECK(soa.Self()->IsExceptionPending());
           soa.Self()->ClearException();
+        } else if (&cls->GetDexFile() != dex_file) {
+          // Ignore classes from different dex files.
         } else if (unverified_classes.find(class_def.class_idx_) == unverified_classes.end()) {
           ASSERT_EQ(cls->GetStatus(), ClassStatus::kVerified);
         } else {
diff --git a/dexdump/dexdump.cc b/dexdump/dexdump.cc
index e72d49e..f5a13f0 100644
--- a/dexdump/dexdump.cc
+++ b/dexdump/dexdump.cc
@@ -45,6 +45,7 @@
 #include "android-base/logging.h"
 #include "android-base/stringprintf.h"
 
+#include "dex/class_accessor-inl.h"
 #include "dex/code_item_accessors-inl.h"
 #include "dex/dex_file-inl.h"
 #include "dex/dex_file_exception_helpers.h"
@@ -611,19 +612,11 @@
           pClassDef.class_data_off_, pClassDef.class_data_off_);
 
   // Fields and methods.
-  const u1* pEncodedData = pDexFile->GetClassData(pClassDef);
-  if (pEncodedData != nullptr) {
-    ClassDataItemIterator pClassData(*pDexFile, pEncodedData);
-    fprintf(gOutFile, "static_fields_size  : %d\n", pClassData.NumStaticFields());
-    fprintf(gOutFile, "instance_fields_size: %d\n", pClassData.NumInstanceFields());
-    fprintf(gOutFile, "direct_methods_size : %d\n", pClassData.NumDirectMethods());
-    fprintf(gOutFile, "virtual_methods_size: %d\n", pClassData.NumVirtualMethods());
-  } else {
-    fprintf(gOutFile, "static_fields_size  : 0\n");
-    fprintf(gOutFile, "instance_fields_size: 0\n");
-    fprintf(gOutFile, "direct_methods_size : 0\n");
-    fprintf(gOutFile, "virtual_methods_size: 0\n");
-  }
+  ClassAccessor accessor(*pDexFile, pClassDef);
+  fprintf(gOutFile, "static_fields_size  : %d\n", accessor.NumStaticFields());
+  fprintf(gOutFile, "instance_fields_size: %d\n", accessor.NumInstanceFields());
+  fprintf(gOutFile, "direct_methods_size : %d\n", accessor.NumDirectMethods());
+  fprintf(gOutFile, "virtual_methods_size: %d\n", accessor.NumVirtualMethods());
   fprintf(gOutFile, "\n");
 }
 
diff --git a/libartbase/Android.bp b/libartbase/Android.bp
index 692c97f..adf0ad6 100644
--- a/libartbase/Android.bp
+++ b/libartbase/Android.bp
@@ -150,6 +150,7 @@
         "base/bit_memory_region_test.cc",
         "base/bit_string_test.cc",
         "base/bit_struct_test.cc",
+        "base/bit_table_test.cc",
         "base/bit_utils_test.cc",
         "base/bit_vector_test.cc",
         "base/file_utils_test.cc",
diff --git a/libartbase/base/bit_memory_region.h b/libartbase/base/bit_memory_region.h
index dd16957..3f4d0ba 100644
--- a/libartbase/base/bit_memory_region.h
+++ b/libartbase/base/bit_memory_region.h
@@ -99,6 +99,13 @@
     return value & mask;
   }
 
+  // Load bits starting at given `bit_offset`, and advance the `bit_offset`.
+  ALWAYS_INLINE uint32_t LoadBitsAndAdvance(size_t* bit_offset, size_t bit_length) const {
+    uint32_t result = LoadBits(*bit_offset, bit_length);
+    *bit_offset += bit_length;
+    return result;
+  }
+
   // Store `bit_length` bits in `data` starting at given `bit_offset`.
   // The least significant bit is stored in the smallest memory offset.
   ALWAYS_INLINE void StoreBits(size_t bit_offset, uint32_t value, size_t bit_length) {
@@ -125,6 +132,12 @@
     DCHECK_EQ(value, LoadBits(bit_offset, bit_length));
   }
 
+  // Store bits starting at given `bit_offset`, and advance the `bit_offset`.
+  ALWAYS_INLINE void StoreBitsAndAdvance(size_t* bit_offset, uint32_t value, size_t bit_length) {
+    StoreBits(*bit_offset, value, bit_length);
+    *bit_offset += bit_length;
+  }
+
   ALWAYS_INLINE bool Equals(const BitMemoryRegion& other) const {
     return data_ == other.data_ &&
            bit_start_ == other.bit_start_ &&
diff --git a/libartbase/base/bit_table.h b/libartbase/base/bit_table.h
new file mode 100644
index 0000000..24bdd13
--- /dev/null
+++ b/libartbase/base/bit_table.h
@@ -0,0 +1,220 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ART_LIBARTBASE_BASE_BIT_TABLE_H_
+#define ART_LIBARTBASE_BASE_BIT_TABLE_H_
+
+#include <vector>
+
+#include "base/bit_memory_region.h"
+#include "base/bit_utils.h"
+#include "base/memory_region.h"
+
+namespace art {
+
+constexpr uint32_t kVarintHeaderBits = 4;
+constexpr uint32_t kVarintSmallValue = 11;  // Maximum value which is stored as-is.
+
+// Load variable-length bit-packed integer from `data` starting at `bit_offset`.
+// The first four bits determine the variable length of the encoded integer:
+//   Values 0..11 represent the result as-is, with no further following bits.
+//   Values 12..15 mean the result is in the next 8/16/24/32-bits respectively.
+ALWAYS_INLINE static inline uint32_t DecodeVarintBits(BitMemoryRegion region, size_t* bit_offset) {
+  uint32_t x = region.LoadBitsAndAdvance(bit_offset, kVarintHeaderBits);
+  if (x > kVarintSmallValue) {
+    x = region.LoadBitsAndAdvance(bit_offset, (x - kVarintSmallValue) * kBitsPerByte);
+  }
+  return x;
+}
+
+// Store variable-length bit-packed integer from `data` starting at `bit_offset`.
+template<typename Vector>
+ALWAYS_INLINE static inline void EncodeVarintBits(Vector* out, size_t* bit_offset, uint32_t value) {
+  if (value <= kVarintSmallValue) {
+    out->resize(BitsToBytesRoundUp(*bit_offset + kVarintHeaderBits));
+    BitMemoryRegion region(MemoryRegion(out->data(), out->size()));
+    region.StoreBitsAndAdvance(bit_offset, value, kVarintHeaderBits);
+  } else {
+    uint32_t num_bits = RoundUp(MinimumBitsToStore(value), kBitsPerByte);
+    out->resize(BitsToBytesRoundUp(*bit_offset + kVarintHeaderBits + num_bits));
+    BitMemoryRegion region(MemoryRegion(out->data(), out->size()));
+    uint32_t header = kVarintSmallValue + num_bits / kBitsPerByte;
+    region.StoreBitsAndAdvance(bit_offset, header, kVarintHeaderBits);
+    region.StoreBitsAndAdvance(bit_offset, value, num_bits);
+  }
+}
+
+template<uint32_t kNumColumns>
+class BitTable {
+ public:
+  class Accessor {
+   public:
+    static constexpr uint32_t kNoValue = std::numeric_limits<uint32_t>::max();
+
+    Accessor(const BitTable* table, uint32_t row) : table_(table), row_(row) {}
+
+    ALWAYS_INLINE uint32_t Row() const { return row_; }
+
+    ALWAYS_INLINE bool IsValid() const { return table_ != nullptr && row_ < table_->NumRows(); }
+
+    template<uint32_t Column>
+    ALWAYS_INLINE uint32_t Get() const {
+      static_assert(Column < kNumColumns, "Column out of bounds");
+      return table_->Get(row_, Column);
+    }
+
+    ALWAYS_INLINE bool Equals(const Accessor& other) {
+      return this->table_ == other.table_ && this->row_ == other.row_;
+    }
+
+    Accessor& operator++() {
+      row_++;
+      return *this;
+    }
+
+   protected:
+    const BitTable* table_;
+    uint32_t row_;
+  };
+
+  static constexpr uint32_t kValueBias = -1;
+
+  BitTable() {}
+  BitTable(void* data, size_t size, size_t* bit_offset = 0) {
+    Decode(BitMemoryRegion(MemoryRegion(data, size)), bit_offset);
+  }
+
+  ALWAYS_INLINE void Decode(BitMemoryRegion region, size_t* bit_offset) {
+    // Decode row count and column sizes from the table header.
+    num_rows_ = DecodeVarintBits(region, bit_offset);
+    if (num_rows_ != 0) {
+      column_offset_[0] = 0;
+      for (uint32_t i = 0; i < kNumColumns; i++) {
+        size_t column_end = column_offset_[i] + DecodeVarintBits(region, bit_offset);
+        column_offset_[i + 1] = column_end;
+        DCHECK_EQ(column_offset_[i + 1], column_end) << "Overflow";
+      }
+    }
+
+    // Record the region which contains the table data and skip past it.
+    table_data_ = region.Subregion(*bit_offset, num_rows_ * NumRowBits());
+    *bit_offset += table_data_.size_in_bits();
+  }
+
+  ALWAYS_INLINE uint32_t Get(uint32_t row, uint32_t column = 0) const {
+    DCHECK_LT(row, num_rows_);
+    DCHECK_LT(column, kNumColumns);
+    size_t offset = row * NumRowBits() + column_offset_[column];
+    return table_data_.LoadBits(offset, NumColumnBits(column)) + kValueBias;
+  }
+
+  size_t NumRows() const { return num_rows_; }
+
+  uint32_t NumRowBits() const { return column_offset_[kNumColumns]; }
+
+  constexpr size_t NumColumns() const { return kNumColumns; }
+
+  uint32_t NumColumnBits(uint32_t column) const {
+    return column_offset_[column + 1] - column_offset_[column];
+  }
+
+  size_t DataBitSize() const { return num_rows_ * column_offset_[kNumColumns]; }
+
+ protected:
+  BitMemoryRegion table_data_;
+  size_t num_rows_ = 0;
+
+  uint16_t column_offset_[kNumColumns + 1] = {};
+};
+
+template<uint32_t kNumColumns>
+constexpr uint32_t BitTable<kNumColumns>::Accessor::kNoValue;
+
+template<uint32_t kNumColumns>
+constexpr uint32_t BitTable<kNumColumns>::kValueBias;
+
+template<uint32_t kNumColumns, typename Alloc = std::allocator<uint32_t>>
+class BitTableBuilder {
+ public:
+  explicit BitTableBuilder(Alloc alloc = Alloc()) : buffer_(alloc) {}
+
+  template<typename ... T>
+  uint32_t AddRow(T ... values) {
+    constexpr size_t count = sizeof...(values);
+    static_assert(count == kNumColumns, "Incorrect argument count");
+    uint32_t data[count] = { values... };
+    buffer_.insert(buffer_.end(), data, data + count);
+    return num_rows_++;
+  }
+
+  ALWAYS_INLINE uint32_t Get(uint32_t row, uint32_t column) const {
+    return buffer_[row * kNumColumns + column];
+  }
+
+  template<typename Vector>
+  void Encode(Vector* out, size_t* bit_offset) {
+    constexpr uint32_t bias = BitTable<kNumColumns>::kValueBias;
+    size_t initial_bit_offset = *bit_offset;
+    // Measure data size.
+    uint32_t max_column_value[kNumColumns] = {};
+    for (uint32_t r = 0; r < num_rows_; r++) {
+      for (uint32_t c = 0; c < kNumColumns; c++) {
+        max_column_value[c] |= Get(r, c) - bias;
+      }
+    }
+    // Write table header.
+    uint32_t table_data_bits = 0;
+    uint32_t column_bits[kNumColumns] = {};
+    EncodeVarintBits(out, bit_offset, num_rows_);
+    if (num_rows_ != 0) {
+      for (uint32_t c = 0; c < kNumColumns; c++) {
+        column_bits[c] = MinimumBitsToStore(max_column_value[c]);
+        EncodeVarintBits(out, bit_offset, column_bits[c]);
+        table_data_bits += num_rows_ * column_bits[c];
+      }
+    }
+    // Write table data.
+    out->resize(BitsToBytesRoundUp(*bit_offset + table_data_bits));
+    BitMemoryRegion region(MemoryRegion(out->data(), out->size()));
+    for (uint32_t r = 0; r < num_rows_; r++) {
+      for (uint32_t c = 0; c < kNumColumns; c++) {
+        region.StoreBitsAndAdvance(bit_offset, Get(r, c) - bias, column_bits[c]);
+      }
+    }
+    // Verify the written data.
+    if (kIsDebugBuild) {
+      BitTable<kNumColumns> table;
+      table.Decode(region, &initial_bit_offset);
+      DCHECK_EQ(this->num_rows_, table.NumRows());
+      for (uint32_t c = 0; c < kNumColumns; c++) {
+        DCHECK_EQ(column_bits[c], table.NumColumnBits(c));
+      }
+      for (uint32_t r = 0; r < num_rows_; r++) {
+        for (uint32_t c = 0; c < kNumColumns; c++) {
+          DCHECK_EQ(this->Get(r, c), table.Get(r, c)) << " (" << r << ", " << c << ")";
+        }
+      }
+    }
+  }
+
+ protected:
+  std::vector<uint32_t, Alloc> buffer_;
+  uint32_t num_rows_ = 0;
+};
+
+}  // namespace art
+
+#endif  // ART_LIBARTBASE_BASE_BIT_TABLE_H_
diff --git a/libartbase/base/bit_table_test.cc b/libartbase/base/bit_table_test.cc
new file mode 100644
index 0000000..25bfcf0
--- /dev/null
+++ b/libartbase/base/bit_table_test.cc
@@ -0,0 +1,117 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "bit_table.h"
+
+#include "gtest/gtest.h"
+
+namespace art {
+
+TEST(BitTableTest, TestVarint) {
+  for (size_t start_bit_offset = 0; start_bit_offset <= 32; start_bit_offset++) {
+    uint32_t values[] = { 0, 1, 11, 12, 15, 16, 255, 256, ~1u, ~0u };
+    for (uint32_t value : values) {
+      std::vector<uint8_t> buffer;
+      size_t encode_bit_offset = start_bit_offset;
+      EncodeVarintBits(&buffer, &encode_bit_offset, value);
+
+      size_t decode_bit_offset = start_bit_offset;
+      BitMemoryRegion region(MemoryRegion(buffer.data(), buffer.size()));
+      uint32_t result = DecodeVarintBits(region, &decode_bit_offset);
+      EXPECT_EQ(encode_bit_offset, decode_bit_offset);
+      EXPECT_EQ(value, result);
+    }
+  }
+}
+
+TEST(BitTableTest, TestEmptyTable) {
+  std::vector<uint8_t> buffer;
+  size_t encode_bit_offset = 0;
+  BitTableBuilder<1> builder;
+  builder.Encode(&buffer, &encode_bit_offset);
+
+  size_t decode_bit_offset = 0;
+  BitTable<1> table(buffer.data(), buffer.size(), &decode_bit_offset);
+  EXPECT_EQ(encode_bit_offset, decode_bit_offset);
+  EXPECT_EQ(0u, table.NumRows());
+}
+
+TEST(BitTableTest, TestSingleColumnTable) {
+  constexpr uint32_t kNoValue = -1;
+  std::vector<uint8_t> buffer;
+  size_t encode_bit_offset = 0;
+  BitTableBuilder<1> builder;
+  builder.AddRow(42u);
+  builder.AddRow(kNoValue);
+  builder.AddRow(1000u);
+  builder.AddRow(kNoValue);
+  builder.Encode(&buffer, &encode_bit_offset);
+
+  size_t decode_bit_offset = 0;
+  BitTable<1> table(buffer.data(), buffer.size(), &decode_bit_offset);
+  EXPECT_EQ(encode_bit_offset, decode_bit_offset);
+  EXPECT_EQ(4u, table.NumRows());
+  EXPECT_EQ(42u, table.Get(0));
+  EXPECT_EQ(kNoValue, table.Get(1));
+  EXPECT_EQ(1000u, table.Get(2));
+  EXPECT_EQ(kNoValue, table.Get(3));
+  EXPECT_EQ(10u, table.NumColumnBits(0));
+}
+
+TEST(BitTableTest, TestUnalignedTable) {
+  for (size_t start_bit_offset = 0; start_bit_offset <= 32; start_bit_offset++) {
+    std::vector<uint8_t> buffer;
+    size_t encode_bit_offset = start_bit_offset;
+    BitTableBuilder<1> builder;
+    builder.AddRow(42u);
+    builder.Encode(&buffer, &encode_bit_offset);
+
+    size_t decode_bit_offset = start_bit_offset;
+    BitTable<1> table(buffer.data(), buffer.size(), &decode_bit_offset);
+    EXPECT_EQ(encode_bit_offset, decode_bit_offset) << " start_bit_offset=" << start_bit_offset;
+    EXPECT_EQ(1u, table.NumRows());
+    EXPECT_EQ(42u, table.Get(0));
+  }
+}
+
+TEST(BitTableTest, TestBigTable) {
+  constexpr uint32_t kNoValue = -1;
+  std::vector<uint8_t> buffer;
+  size_t encode_bit_offset = 0;
+  BitTableBuilder<4> builder;
+  builder.AddRow(42u, kNoValue, 0u, static_cast<uint32_t>(-2));
+  builder.AddRow(62u, kNoValue, 63u, static_cast<uint32_t>(-3));
+  builder.Encode(&buffer, &encode_bit_offset);
+
+  size_t decode_bit_offset = 0;
+  BitTable<4> table(buffer.data(), buffer.size(), &decode_bit_offset);
+  EXPECT_EQ(encode_bit_offset, decode_bit_offset);
+  EXPECT_EQ(2u, table.NumRows());
+  EXPECT_EQ(42u, table.Get(0, 0));
+  EXPECT_EQ(kNoValue, table.Get(0, 1));
+  EXPECT_EQ(0u, table.Get(0, 2));
+  EXPECT_EQ(static_cast<uint32_t>(-2), table.Get(0, 3));
+  EXPECT_EQ(62u, table.Get(1, 0));
+  EXPECT_EQ(kNoValue, table.Get(1, 1));
+  EXPECT_EQ(63u, table.Get(1, 2));
+  EXPECT_EQ(static_cast<uint32_t>(-3), table.Get(1, 3));
+  EXPECT_EQ(6u, table.NumColumnBits(0));
+  EXPECT_EQ(0u, table.NumColumnBits(1));
+  EXPECT_EQ(7u, table.NumColumnBits(2));
+  EXPECT_EQ(32u, table.NumColumnBits(3));
+}
+
+}  // namespace art
diff --git a/libdexfile/dex/class_accessor-inl.h b/libdexfile/dex/class_accessor-inl.h
new file mode 100644
index 0000000..bcd0a7b
--- /dev/null
+++ b/libdexfile/dex/class_accessor-inl.h
@@ -0,0 +1,104 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ART_LIBDEXFILE_DEX_CLASS_ACCESSOR_INL_H_
+#define ART_LIBDEXFILE_DEX_CLASS_ACCESSOR_INL_H_
+
+#include "class_accessor.h"
+
+#include "base/leb128.h"
+
+namespace art {
+
+inline ClassAccessor::ClassAccessor(const DexFile& dex_file, const DexFile::ClassDef& class_def)
+    : ClassAccessor(dex_file, dex_file.GetClassData(class_def)) {}
+
+inline ClassAccessor::ClassAccessor(const DexFile& dex_file, const uint8_t* class_data)
+    : dex_file_(dex_file),
+      ptr_pos_(class_data),
+      num_static_fields_(class_data != nullptr ? DecodeUnsignedLeb128(&ptr_pos_) : 0u),
+      num_instance_fields_(class_data != nullptr ? DecodeUnsignedLeb128(&ptr_pos_) : 0u),
+      num_direct_methods_(class_data != nullptr ? DecodeUnsignedLeb128(&ptr_pos_) : 0u),
+      num_virtual_methods_(class_data != nullptr ? DecodeUnsignedLeb128(&ptr_pos_) : 0u) {}
+
+inline const uint8_t* ClassAccessor::Method::Read(const uint8_t* ptr) {
+  method_idx_ += DecodeUnsignedLeb128(&ptr);
+  access_flags_ = DecodeUnsignedLeb128(&ptr);
+  code_off_ = DecodeUnsignedLeb128(&ptr);
+  return ptr;
+}
+
+inline const uint8_t* ClassAccessor::Field::Read(const uint8_t* ptr) {
+  field_idx_ += DecodeUnsignedLeb128(&ptr);
+  access_flags_ = DecodeUnsignedLeb128(&ptr);
+  return ptr;
+}
+
+template <typename StaticFieldVisitor,
+          typename InstanceFieldVisitor,
+          typename DirectMethodVisitor,
+          typename VirtualMethodVisitor>
+inline void ClassAccessor::VisitMethodsAndFields(
+    const StaticFieldVisitor& static_field_visitor,
+    const InstanceFieldVisitor& instance_field_visitor,
+    const DirectMethodVisitor& direct_method_visitor,
+    const VirtualMethodVisitor& virtual_method_visitor) const {
+  const uint8_t* ptr = ptr_pos_;
+  for (size_t i = 0; i < num_static_fields_; ++i) {
+    Field data;
+    ptr = data.Read(ptr);
+    static_field_visitor(data);
+  }
+  for (size_t i = 0; i < num_instance_fields_; ++i) {
+    Field data;
+    ptr = data.Read(ptr);
+    instance_field_visitor(data);
+  }
+  for (size_t i = 0; i < num_direct_methods_; ++i) {
+    Method data;
+    ptr = data.Read(ptr);
+    direct_method_visitor(data);
+  }
+  for (size_t i = 0; i < num_virtual_methods_; ++i) {
+    Method data;
+    ptr = data.Read(ptr);
+    virtual_method_visitor(data);
+  }
+}
+
+template <typename DirectMethodVisitor,
+          typename VirtualMethodVisitor>
+inline void ClassAccessor::VisitMethods(const DirectMethodVisitor& direct_method_visitor,
+                                        const VirtualMethodVisitor& virtual_method_visitor) const {
+  VisitMethodsAndFields(VoidFunctor(),
+                        VoidFunctor(),
+                        direct_method_visitor,
+                        virtual_method_visitor);
+}
+
+// Visit direct and virtual methods.
+template <typename MethodVisitor>
+inline void ClassAccessor::VisitMethods(const MethodVisitor& method_visitor) const {
+  VisitMethods(method_visitor, method_visitor);
+}
+
+inline const DexFile::CodeItem* ClassAccessor::GetCodeItem(const Method& method) const {
+  return dex_file_.GetCodeItem(method.GetCodeItemOffset());
+}
+
+}  // namespace art
+
+#endif  // ART_LIBDEXFILE_DEX_CLASS_ACCESSOR_INL_H_
diff --git a/libdexfile/dex/class_accessor.h b/libdexfile/dex/class_accessor.h
new file mode 100644
index 0000000..59a6b5d
--- /dev/null
+++ b/libdexfile/dex/class_accessor.h
@@ -0,0 +1,131 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ART_LIBDEXFILE_DEX_CLASS_ACCESSOR_H_
+#define ART_LIBDEXFILE_DEX_CLASS_ACCESSOR_H_
+
+#include "base/utils.h"
+#include "dex_file.h"
+
+namespace art {
+
+// Classes to access Dex data.
+class ClassAccessor {
+ public:
+  // Class method data.
+  class Method {
+   public:
+    uint32_t GetIndex() const {
+      return method_idx_;
+    }
+
+    uint32_t GetAccessFlags() const {
+      return access_flags_;
+    }
+
+    uint32_t GetCodeItemOffset() const {
+      return code_off_;
+    }
+
+   private:
+    const uint8_t* Read(const uint8_t* ptr);
+
+    // A decoded version of the method of a class_data_item.
+    uint32_t method_idx_ = 0u;
+    uint32_t access_flags_ = 0u;
+    uint32_t code_off_ = 0u;
+
+    friend class ClassAccessor;
+  };
+
+  // Class field data.
+  class Field {
+   public:
+    uint32_t GetIndex() const {
+      return field_idx_;
+    }
+
+    uint32_t GetAccessFlags() const {
+      return access_flags_;
+    }
+
+   private:
+    const uint8_t* Read(const uint8_t* ptr);
+
+    // A decoded version of the field of a class_data_item.
+    uint32_t field_idx_ = 0u;
+    uint32_t access_flags_ = 0u;
+
+    friend class ClassAccessor;
+  };
+
+  ALWAYS_INLINE ClassAccessor(const DexFile& dex_file, const DexFile::ClassDef& class_def);
+
+  // Return the code item for a method.
+  const DexFile::CodeItem* GetCodeItem(const Method& method) const;
+
+  // Iterator data is not very iterator friendly, use visitors to get around this.
+  template <typename StaticFieldVisitor,
+            typename InstanceFieldVisitor,
+            typename DirectMethodVisitor,
+            typename VirtualMethodVisitor>
+  void VisitMethodsAndFields(const StaticFieldVisitor& static_field_visitor,
+                             const InstanceFieldVisitor& instance_field_visitor,
+                             const DirectMethodVisitor& direct_method_visitor,
+                             const VirtualMethodVisitor& virtual_method_visitor) const;
+
+  template <typename DirectMethodVisitor,
+            typename VirtualMethodVisitor>
+  void VisitMethods(const DirectMethodVisitor& direct_method_visitor,
+                    const VirtualMethodVisitor& virtual_method_visitor) const;
+
+  // Visit direct and virtual methods.
+  template <typename MethodVisitor>
+  void VisitMethods(const MethodVisitor& method_visitor) const;
+
+  uint32_t NumStaticFields() const {
+    return num_static_fields_;
+  }
+
+  uint32_t NumInstanceFields() const {
+    return num_instance_fields_;
+  }
+
+  uint32_t NumDirectMethods() const {
+    return num_direct_methods_;
+  }
+
+  uint32_t NumVirtualMethods() const {
+    return num_virtual_methods_;
+  }
+
+ protected:
+  ALWAYS_INLINE ClassAccessor(const DexFile& dex_file, const uint8_t* class_data);
+
+  const DexFile& dex_file_;
+  const uint8_t* ptr_pos_ = nullptr;  // Pointer into stream of class_data_item.
+  const uint32_t num_static_fields_ = 0u;
+  const uint32_t num_instance_fields_ = 0u;
+  const uint32_t num_direct_methods_ = 0u;
+  const uint32_t num_virtual_methods_ = 0u;
+  // Only cache descriptor.
+  const void* class_def_ = nullptr;
+  const void* class_data_ = nullptr;
+};
+
+}  // namespace art
+
+#endif  // ART_LIBDEXFILE_DEX_CLASS_ACCESSOR_H_
diff --git a/oatdump/oatdump.cc b/oatdump/oatdump.cc
index 44050ff..5c20efa 100644
--- a/oatdump/oatdump.cc
+++ b/oatdump/oatdump.cc
@@ -753,7 +753,7 @@
       kByteKindQuickMethodHeader,
       kByteKindCodeInfoLocationCatalog,
       kByteKindCodeInfoDexRegisterMap,
-      kByteKindCodeInfoEncoding,
+      kByteKindCodeInfo,
       kByteKindCodeInfoInvokeInfo,
       kByteKindCodeInfoStackMasks,
       kByteKindCodeInfoRegisterMasks,
@@ -800,7 +800,7 @@
       if (sum > 0) {
         Dump(os, "Code                            ", bits[kByteKindCode], sum);
         Dump(os, "QuickMethodHeader               ", bits[kByteKindQuickMethodHeader], sum);
-        Dump(os, "CodeInfoEncoding                ", bits[kByteKindCodeInfoEncoding], sum);
+        Dump(os, "CodeInfo                        ", bits[kByteKindCodeInfo], sum);
         Dump(os, "CodeInfoLocationCatalog         ", bits[kByteKindCodeInfoLocationCatalog], sum);
         Dump(os, "CodeInfoDexRegisterMap          ", bits[kByteKindCodeInfoDexRegisterMap], sum);
         Dump(os, "CodeInfoStackMasks              ", bits[kByteKindCodeInfoStackMasks], sum);
@@ -819,7 +819,7 @@
                stack_map_bits,
                "stack map");
           Dump(os,
-               "StackMapDexPcEncoding         ",
+               "StackMapDexPc                 ",
                bits[kByteKindStackMapDexPc],
                stack_map_bits,
                "stack map");
@@ -1732,8 +1732,7 @@
    public:
     explicit StackMapsHelper(const uint8_t* raw_code_info, InstructionSet instruction_set)
         : code_info_(raw_code_info),
-          encoding_(code_info_.ExtractEncoding()),
-          number_of_stack_maps_(code_info_.GetNumberOfStackMaps(encoding_)),
+          number_of_stack_maps_(code_info_.GetNumberOfStackMaps()),
           indexes_(),
           offset_(static_cast<uint32_t>(-1)),
           stack_map_index_(0u),
@@ -1741,11 +1740,11 @@
       if (number_of_stack_maps_ != 0u) {
         // Check if native PCs are ordered.
         bool ordered = true;
-        StackMap last = code_info_.GetStackMapAt(0u, encoding_);
+        StackMap last = code_info_.GetStackMapAt(0u);
         for (size_t i = 1; i != number_of_stack_maps_; ++i) {
-          StackMap current = code_info_.GetStackMapAt(i, encoding_);
-          if (last.GetNativePcOffset(encoding_.stack_map.encoding, instruction_set) >
-              current.GetNativePcOffset(encoding_.stack_map.encoding, instruction_set)) {
+          StackMap current = code_info_.GetStackMapAt(i);
+          if (last.GetNativePcOffset(instruction_set) >
+              current.GetNativePcOffset(instruction_set)) {
             ordered = false;
             break;
           }
@@ -1760,18 +1759,15 @@
           std::sort(indexes_.begin(),
                     indexes_.end(),
                     [this](size_t lhs, size_t rhs) {
-                      StackMap left = code_info_.GetStackMapAt(lhs, encoding_);
-                      uint32_t left_pc = left.GetNativePcOffset(encoding_.stack_map.encoding,
-                                                                instruction_set_);
-                      StackMap right = code_info_.GetStackMapAt(rhs, encoding_);
-                      uint32_t right_pc = right.GetNativePcOffset(encoding_.stack_map.encoding,
-                                                                  instruction_set_);
+                      StackMap left = code_info_.GetStackMapAt(lhs);
+                      uint32_t left_pc = left.GetNativePcOffset(instruction_set_);
+                      StackMap right = code_info_.GetStackMapAt(rhs);
+                      uint32_t right_pc = right.GetNativePcOffset(instruction_set_);
                       // If the PCs are the same, compare indexes to preserve the original order.
                       return (left_pc < right_pc) || (left_pc == right_pc && lhs < rhs);
                     });
         }
-        offset_ = GetStackMapAt(0).GetNativePcOffset(encoding_.stack_map.encoding,
-                                                     instruction_set_);
+        offset_ = GetStackMapAt(0).GetNativePcOffset(instruction_set_);
       }
     }
 
@@ -1779,10 +1775,6 @@
       return code_info_;
     }
 
-    const CodeInfoEncoding& GetEncoding() const {
-      return encoding_;
-    }
-
     uint32_t GetOffset() const {
       return offset_;
     }
@@ -1795,8 +1787,7 @@
       ++stack_map_index_;
       offset_ = (stack_map_index_ == number_of_stack_maps_)
           ? static_cast<uint32_t>(-1)
-          : GetStackMapAt(stack_map_index_).GetNativePcOffset(encoding_.stack_map.encoding,
-                                                              instruction_set_);
+          : GetStackMapAt(stack_map_index_).GetNativePcOffset(instruction_set_);
     }
 
    private:
@@ -1805,11 +1796,10 @@
         i = indexes_[i];
       }
       DCHECK_LT(i, number_of_stack_maps_);
-      return code_info_.GetStackMapAt(i, encoding_);
+      return code_info_.GetStackMapAt(i);
     }
 
     const CodeInfo code_info_;
-    const CodeInfoEncoding encoding_;
     const size_t number_of_stack_maps_;
     dchecked_vector<size_t> indexes_;  // Used if stack map native PCs are not ordered.
     uint32_t offset_;
@@ -1835,79 +1825,75 @@
       StackMapsHelper helper(oat_method.GetVmapTable(), instruction_set_);
       MethodInfo method_info(oat_method.GetOatQuickMethodHeader()->GetOptimizedMethodInfo());
       {
-        CodeInfoEncoding encoding(helper.GetEncoding());
-        StackMapEncoding stack_map_encoding(encoding.stack_map.encoding);
-        const size_t num_stack_maps = encoding.stack_map.num_entries;
-        if (stats_.AddBitsIfUnique(Stats::kByteKindCodeInfoEncoding,
-                                   encoding.HeaderSize() * kBitsPerByte,
+        const CodeInfo code_info = helper.GetCodeInfo();
+        const BitTable<StackMap::kCount>& stack_maps = code_info.stack_maps_;
+        const size_t num_stack_maps = stack_maps.NumRows();
+        if (stats_.AddBitsIfUnique(Stats::kByteKindCodeInfo,
+                                   code_info.size_ * kBitsPerByte,
                                    oat_method.GetVmapTable())) {
           // Stack maps
           stats_.AddBits(
               Stats::kByteKindStackMapNativePc,
-              stack_map_encoding.GetNativePcEncoding().BitSize() * num_stack_maps);
+              stack_maps.NumColumnBits(StackMap::kNativePcOffset) * num_stack_maps);
           stats_.AddBits(
               Stats::kByteKindStackMapDexPc,
-              stack_map_encoding.GetDexPcEncoding().BitSize() * num_stack_maps);
+              stack_maps.NumColumnBits(StackMap::kDexPc) * num_stack_maps);
           stats_.AddBits(
               Stats::kByteKindStackMapDexRegisterMap,
-              stack_map_encoding.GetDexRegisterMapEncoding().BitSize() * num_stack_maps);
+              stack_maps.NumColumnBits(StackMap::kDexRegisterMapOffset) * num_stack_maps);
           stats_.AddBits(
               Stats::kByteKindStackMapInlineInfoIndex,
-              stack_map_encoding.GetInlineInfoEncoding().BitSize() * num_stack_maps);
+              stack_maps.NumColumnBits(StackMap::kInlineInfoIndex) * num_stack_maps);
           stats_.AddBits(
               Stats::kByteKindStackMapRegisterMaskIndex,
-              stack_map_encoding.GetRegisterMaskIndexEncoding().BitSize() * num_stack_maps);
+              stack_maps.NumColumnBits(StackMap::kRegisterMaskIndex) * num_stack_maps);
           stats_.AddBits(
               Stats::kByteKindStackMapStackMaskIndex,
-              stack_map_encoding.GetStackMaskIndexEncoding().BitSize() * num_stack_maps);
+              stack_maps.NumColumnBits(StackMap::kStackMaskIndex) * num_stack_maps);
 
           // Stack masks
           stats_.AddBits(
               Stats::kByteKindCodeInfoStackMasks,
-              encoding.stack_mask.encoding.BitSize() * encoding.stack_mask.num_entries);
+              code_info.stack_masks_.size_in_bits());
 
           // Register masks
           stats_.AddBits(
               Stats::kByteKindCodeInfoRegisterMasks,
-              encoding.register_mask.encoding.BitSize() * encoding.register_mask.num_entries);
+              code_info.register_masks_.DataBitSize());
 
           // Invoke infos
-          if (encoding.invoke_info.num_entries > 0u) {
-            stats_.AddBits(
-                Stats::kByteKindCodeInfoInvokeInfo,
-                encoding.invoke_info.encoding.BitSize() * encoding.invoke_info.num_entries);
-          }
+          stats_.AddBits(
+              Stats::kByteKindCodeInfoInvokeInfo,
+              code_info.invoke_infos_.DataBitSize());
 
           // Location catalog
           const size_t location_catalog_bytes =
-              helper.GetCodeInfo().GetDexRegisterLocationCatalogSize(encoding);
+              helper.GetCodeInfo().GetDexRegisterLocationCatalogSize();
           stats_.AddBits(Stats::kByteKindCodeInfoLocationCatalog,
                          kBitsPerByte * location_catalog_bytes);
           // Dex register bytes.
           const size_t dex_register_bytes =
-              helper.GetCodeInfo().GetDexRegisterMapsSize(encoding,
-                                                          code_item_accessor.RegistersSize());
+              helper.GetCodeInfo().GetDexRegisterMapsSize(code_item_accessor.RegistersSize());
           stats_.AddBits(
               Stats::kByteKindCodeInfoDexRegisterMap,
               kBitsPerByte * dex_register_bytes);
 
           // Inline infos.
-          const size_t num_inline_infos = encoding.inline_info.num_entries;
+          const BitTable<InlineInfo::kCount>& inline_infos = code_info.inline_infos_;
+          const size_t num_inline_infos = inline_infos.NumRows();
           if (num_inline_infos > 0u) {
             stats_.AddBits(
                 Stats::kByteKindInlineInfoMethodIndexIdx,
-                encoding.inline_info.encoding.GetMethodIndexIdxEncoding().BitSize() *
-                    num_inline_infos);
+                inline_infos.NumColumnBits(InlineInfo::kMethodIndexIdx) * num_inline_infos);
             stats_.AddBits(
                 Stats::kByteKindInlineInfoDexPc,
-                encoding.inline_info.encoding.GetDexPcEncoding().BitSize() * num_inline_infos);
+                inline_infos.NumColumnBits(InlineInfo::kDexPc) * num_inline_infos);
             stats_.AddBits(
                 Stats::kByteKindInlineInfoExtraData,
-                encoding.inline_info.encoding.GetExtraDataEncoding().BitSize() * num_inline_infos);
+                inline_infos.NumColumnBits(InlineInfo::kExtraData) * num_inline_infos);
             stats_.AddBits(
                 Stats::kByteKindInlineInfoDexRegisterMap,
-                encoding.inline_info.encoding.GetDexRegisterMapEncoding().BitSize() *
-                    num_inline_infos);
+                inline_infos.NumColumnBits(InlineInfo::kDexRegisterMapOffset) * num_inline_infos);
             stats_.AddBits(Stats::kByteKindInlineInfoIsLast, num_inline_infos);
           }
         }
@@ -1922,7 +1908,6 @@
           DCHECK(stack_map.IsValid());
           stack_map.Dump(vios,
                          helper.GetCodeInfo(),
-                         helper.GetEncoding(),
                          method_info,
                          oat_method.GetCodeOffset(),
                          code_item_accessor.RegistersSize(),
diff --git a/oatdump/oatdump_test.h b/oatdump/oatdump_test.h
index b85730d..bbe89ca 100644
--- a/oatdump/oatdump_test.h
+++ b/oatdump/oatdump_test.h
@@ -162,7 +162,6 @@
         // Code and dex code do not show up if list only.
         expected_prefixes.push_back("DEX CODE:");
         expected_prefixes.push_back("CODE:");
-        expected_prefixes.push_back("CodeInfoEncoding");
         expected_prefixes.push_back("CodeInfoInlineInfo");
       }
       if (mode == kModeArt) {
diff --git a/runtime/arch/arch_test.cc b/runtime/arch/arch_test.cc
index 1ba4070..d4ceede 100644
--- a/runtime/arch/arch_test.cc
+++ b/runtime/arch/arch_test.cc
@@ -18,6 +18,7 @@
 
 #include "art_method-inl.h"
 #include "base/callee_save_type.h"
+#include "entrypoints/quick/callee_save_frame.h"
 #include "common_runtime_test.h"
 #include "quick/quick_method_frame_info.h"
 
@@ -57,21 +58,6 @@
   void FinalizeSetup() OVERRIDE {
     ASSERT_EQ(InstructionSet::kX86_64, Runtime::Current()->GetInstructionSet());
   }
-
-  static void CheckFrameSize(InstructionSet isa, CalleeSaveType type, uint32_t save_size)
-      NO_THREAD_SAFETY_ANALYSIS {
-    Runtime* const runtime = Runtime::Current();
-    Thread* const self = Thread::Current();
-    ScopedObjectAccess soa(self);  // So we can create callee-save methods.
-
-    runtime->SetInstructionSet(isa);
-    ArtMethod* save_method = runtime->CreateCalleeSaveMethod();
-    runtime->SetCalleeSaveMethod(save_method, type);
-    QuickMethodFrameInfo frame_info =  runtime->GetRuntimeMethodFrameInfo(save_method);
-    EXPECT_EQ(frame_info.FrameSizeInBytes(), save_size) << "Expected and real size differs for "
-        << type << " core spills=" << std::hex << frame_info.CoreSpillMask() << " fp spills="
-        << frame_info.FpSpillMask() << std::dec;
-  }
 };
 
 TEST_F(ArchTest, CheckCommonOffsetsAndSizes) {
@@ -205,26 +191,20 @@
 }  // namespace x86_64
 
 // Check architecture specific constants are sound.
-#define TEST_ARCH(Arch, arch)                                       \
-  TEST_F(ArchTest, Arch) {                                          \
-    CheckFrameSize(InstructionSet::k##Arch,                         \
-                   CalleeSaveType::kSaveAllCalleeSaves,             \
-                   arch::kFrameSizeSaveAllCalleeSaves);             \
-    CheckFrameSize(InstructionSet::k##Arch,                         \
-                   CalleeSaveType::kSaveRefsOnly,                   \
-                   arch::kFrameSizeSaveRefsOnly);                   \
-    CheckFrameSize(InstructionSet::k##Arch,                         \
-                   CalleeSaveType::kSaveRefsAndArgs,                \
-                   arch::kFrameSizeSaveRefsAndArgs);                \
-    CheckFrameSize(InstructionSet::k##Arch,                         \
-                   CalleeSaveType::kSaveEverything,                 \
-                   arch::kFrameSizeSaveEverything);                 \
-    CheckFrameSize(InstructionSet::k##Arch,                         \
-                   CalleeSaveType::kSaveEverythingForClinit,        \
-                   arch::kFrameSizeSaveEverythingForClinit);        \
-    CheckFrameSize(InstructionSet::k##Arch,                         \
-                   CalleeSaveType::kSaveEverythingForSuspendCheck,  \
-                   arch::kFrameSizeSaveEverythingForSuspendCheck);  \
+// We expect the return PC to be stored at the highest address slot in the frame.
+#define TEST_ARCH_TYPE(Arch, arch, type)                                              \
+  EXPECT_EQ(arch::Arch##CalleeSaveFrame::GetFrameSize(CalleeSaveType::k##type),       \
+            arch::kFrameSize##type);                                                  \
+  EXPECT_EQ(arch::Arch##CalleeSaveFrame::GetReturnPcOffset(CalleeSaveType::k##type),  \
+            arch::kFrameSize##type - static_cast<size_t>(k##Arch##PointerSize))
+#define TEST_ARCH(Arch, arch)                                   \
+  TEST_F(ArchTest, Arch) {                                      \
+    TEST_ARCH_TYPE(Arch, arch, SaveAllCalleeSaves);             \
+    TEST_ARCH_TYPE(Arch, arch, SaveRefsOnly);                   \
+    TEST_ARCH_TYPE(Arch, arch, SaveRefsAndArgs);                \
+    TEST_ARCH_TYPE(Arch, arch, SaveEverything);                 \
+    TEST_ARCH_TYPE(Arch, arch, SaveEverythingForClinit);        \
+    TEST_ARCH_TYPE(Arch, arch, SaveEverythingForSuspendCheck);  \
   }
 TEST_ARCH(Arm, arm)
 TEST_ARCH(Arm64, arm64)
diff --git a/runtime/arch/arm/callee_save_frame_arm.h b/runtime/arch/arm/callee_save_frame_arm.h
new file mode 100644
index 0000000..11eefb9
--- /dev/null
+++ b/runtime/arch/arm/callee_save_frame_arm.h
@@ -0,0 +1,111 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ART_RUNTIME_ARCH_ARM_CALLEE_SAVE_FRAME_ARM_H_
+#define ART_RUNTIME_ARCH_ARM_CALLEE_SAVE_FRAME_ARM_H_
+
+#include "arch/instruction_set.h"
+#include "base/bit_utils.h"
+#include "base/callee_save_type.h"
+#include "base/enums.h"
+#include "base/globals.h"
+#include "quick/quick_method_frame_info.h"
+#include "registers_arm.h"
+
+namespace art {
+namespace arm {
+
+static constexpr uint32_t kArmCalleeSaveAlwaysSpills =
+    (1 << art::arm::LR);
+static constexpr uint32_t kArmCalleeSaveRefSpills =
+    (1 << art::arm::R5) | (1 << art::arm::R6)  | (1 << art::arm::R7) | (1 << art::arm::R8) |
+    (1 << art::arm::R10) | (1 << art::arm::R11);
+static constexpr uint32_t kArmCalleeSaveArgSpills =
+    (1 << art::arm::R1) | (1 << art::arm::R2) | (1 << art::arm::R3);
+static constexpr uint32_t kArmCalleeSaveAllSpills =
+    (1 << art::arm::R4) | (1 << art::arm::R9);
+static constexpr uint32_t kArmCalleeSaveEverythingSpills =
+    (1 << art::arm::R0) | (1 << art::arm::R1) | (1 << art::arm::R2) | (1 << art::arm::R3) |
+    (1 << art::arm::R4) | (1 << art::arm::R9) | (1 << art::arm::R12);
+
+static constexpr uint32_t kArmCalleeSaveFpAlwaysSpills = 0;
+static constexpr uint32_t kArmCalleeSaveFpRefSpills = 0;
+static constexpr uint32_t kArmCalleeSaveFpArgSpills =
+    (1 << art::arm::S0)  | (1 << art::arm::S1)  | (1 << art::arm::S2)  | (1 << art::arm::S3)  |
+    (1 << art::arm::S4)  | (1 << art::arm::S5)  | (1 << art::arm::S6)  | (1 << art::arm::S7)  |
+    (1 << art::arm::S8)  | (1 << art::arm::S9)  | (1 << art::arm::S10) | (1 << art::arm::S11) |
+    (1 << art::arm::S12) | (1 << art::arm::S13) | (1 << art::arm::S14) | (1 << art::arm::S15);
+static constexpr uint32_t kArmCalleeSaveFpAllSpills =
+    (1 << art::arm::S16) | (1 << art::arm::S17) | (1 << art::arm::S18) | (1 << art::arm::S19) |
+    (1 << art::arm::S20) | (1 << art::arm::S21) | (1 << art::arm::S22) | (1 << art::arm::S23) |
+    (1 << art::arm::S24) | (1 << art::arm::S25) | (1 << art::arm::S26) | (1 << art::arm::S27) |
+    (1 << art::arm::S28) | (1 << art::arm::S29) | (1 << art::arm::S30) | (1 << art::arm::S31);
+static constexpr uint32_t kArmCalleeSaveFpEverythingSpills =
+    kArmCalleeSaveFpArgSpills | kArmCalleeSaveFpAllSpills;
+
+class ArmCalleeSaveFrame {
+ public:
+  static constexpr uint32_t GetCoreSpills(CalleeSaveType type) {
+    type = GetCanonicalCalleeSaveType(type);
+    return kArmCalleeSaveAlwaysSpills | kArmCalleeSaveRefSpills |
+        (type == CalleeSaveType::kSaveRefsAndArgs ? kArmCalleeSaveArgSpills : 0) |
+        (type == CalleeSaveType::kSaveAllCalleeSaves ? kArmCalleeSaveAllSpills : 0) |
+        (type == CalleeSaveType::kSaveEverything ? kArmCalleeSaveEverythingSpills : 0);
+  }
+
+  static constexpr uint32_t GetFpSpills(CalleeSaveType type) {
+    type = GetCanonicalCalleeSaveType(type);
+    return kArmCalleeSaveFpAlwaysSpills | kArmCalleeSaveFpRefSpills |
+        (type == CalleeSaveType::kSaveRefsAndArgs ? kArmCalleeSaveFpArgSpills : 0) |
+        (type == CalleeSaveType::kSaveAllCalleeSaves ? kArmCalleeSaveFpAllSpills : 0) |
+        (type == CalleeSaveType::kSaveEverything ? kArmCalleeSaveFpEverythingSpills : 0);
+  }
+
+  static constexpr uint32_t GetFrameSize(CalleeSaveType type) {
+    type = GetCanonicalCalleeSaveType(type);
+    return RoundUp((POPCOUNT(GetCoreSpills(type)) /* gprs */ +
+                    POPCOUNT(GetFpSpills(type)) /* fprs */ +
+                    1 /* Method* */) * static_cast<size_t>(kArmPointerSize), kStackAlignment);
+  }
+
+  static constexpr QuickMethodFrameInfo GetMethodFrameInfo(CalleeSaveType type) {
+    type = GetCanonicalCalleeSaveType(type);
+    return QuickMethodFrameInfo(GetFrameSize(type), GetCoreSpills(type), GetFpSpills(type));
+  }
+
+  static constexpr size_t GetFpr1Offset(CalleeSaveType type) {
+    type = GetCanonicalCalleeSaveType(type);
+    return GetFrameSize(type) -
+           (POPCOUNT(GetCoreSpills(type)) +
+            POPCOUNT(GetFpSpills(type))) * static_cast<size_t>(kArmPointerSize);
+  }
+
+  static constexpr size_t GetGpr1Offset(CalleeSaveType type) {
+    type = GetCanonicalCalleeSaveType(type);
+    return GetFrameSize(type) -
+           POPCOUNT(GetCoreSpills(type)) * static_cast<size_t>(kArmPointerSize);
+  }
+
+  static constexpr size_t GetReturnPcOffset(CalleeSaveType type) {
+    type = GetCanonicalCalleeSaveType(type);
+    return GetFrameSize(type) - static_cast<size_t>(kArmPointerSize);
+  }
+};
+
+}  // namespace arm
+}  // namespace art
+
+#endif  // ART_RUNTIME_ARCH_ARM_CALLEE_SAVE_FRAME_ARM_H_
diff --git a/runtime/arch/arm/quick_method_frame_info_arm.h b/runtime/arch/arm/quick_method_frame_info_arm.h
deleted file mode 100644
index 5c5b81b..0000000
--- a/runtime/arch/arm/quick_method_frame_info_arm.h
+++ /dev/null
@@ -1,110 +0,0 @@
-/*
- * Copyright (C) 2014 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef ART_RUNTIME_ARCH_ARM_QUICK_METHOD_FRAME_INFO_ARM_H_
-#define ART_RUNTIME_ARCH_ARM_QUICK_METHOD_FRAME_INFO_ARM_H_
-
-#include "arch/instruction_set.h"
-#include "base/bit_utils.h"
-#include "base/callee_save_type.h"
-#include "base/enums.h"
-#include "quick/quick_method_frame_info.h"
-#include "registers_arm.h"
-
-namespace art {
-namespace arm {
-
-static constexpr uint32_t kArmCalleeSaveAlwaysSpills =
-    (1 << art::arm::LR);
-static constexpr uint32_t kArmCalleeSaveRefSpills =
-    (1 << art::arm::R5) | (1 << art::arm::R6)  | (1 << art::arm::R7) | (1 << art::arm::R8) |
-    (1 << art::arm::R10) | (1 << art::arm::R11);
-static constexpr uint32_t kArmCalleeSaveArgSpills =
-    (1 << art::arm::R1) | (1 << art::arm::R2) | (1 << art::arm::R3);
-static constexpr uint32_t kArmCalleeSaveAllSpills =
-    (1 << art::arm::R4) | (1 << art::arm::R9);
-static constexpr uint32_t kArmCalleeSaveEverythingSpills =
-    (1 << art::arm::R0) | (1 << art::arm::R1) | (1 << art::arm::R2) | (1 << art::arm::R3) |
-    (1 << art::arm::R4) | (1 << art::arm::R9) | (1 << art::arm::R12);
-
-static constexpr uint32_t kArmCalleeSaveFpAlwaysSpills = 0;
-static constexpr uint32_t kArmCalleeSaveFpRefSpills = 0;
-static constexpr uint32_t kArmCalleeSaveFpArgSpills =
-    (1 << art::arm::S0)  | (1 << art::arm::S1)  | (1 << art::arm::S2)  | (1 << art::arm::S3)  |
-    (1 << art::arm::S4)  | (1 << art::arm::S5)  | (1 << art::arm::S6)  | (1 << art::arm::S7)  |
-    (1 << art::arm::S8)  | (1 << art::arm::S9)  | (1 << art::arm::S10) | (1 << art::arm::S11) |
-    (1 << art::arm::S12) | (1 << art::arm::S13) | (1 << art::arm::S14) | (1 << art::arm::S15);
-static constexpr uint32_t kArmCalleeSaveFpAllSpills =
-    (1 << art::arm::S16) | (1 << art::arm::S17) | (1 << art::arm::S18) | (1 << art::arm::S19) |
-    (1 << art::arm::S20) | (1 << art::arm::S21) | (1 << art::arm::S22) | (1 << art::arm::S23) |
-    (1 << art::arm::S24) | (1 << art::arm::S25) | (1 << art::arm::S26) | (1 << art::arm::S27) |
-    (1 << art::arm::S28) | (1 << art::arm::S29) | (1 << art::arm::S30) | (1 << art::arm::S31);
-static constexpr uint32_t kArmCalleeSaveFpEverythingSpills =
-    kArmCalleeSaveFpArgSpills | kArmCalleeSaveFpAllSpills;
-
-constexpr uint32_t ArmCalleeSaveCoreSpills(CalleeSaveType type) {
-  type = GetCanonicalCalleeSaveType(type);
-  return kArmCalleeSaveAlwaysSpills | kArmCalleeSaveRefSpills |
-      (type == CalleeSaveType::kSaveRefsAndArgs ? kArmCalleeSaveArgSpills : 0) |
-      (type == CalleeSaveType::kSaveAllCalleeSaves ? kArmCalleeSaveAllSpills : 0) |
-      (type == CalleeSaveType::kSaveEverything ? kArmCalleeSaveEverythingSpills : 0);
-}
-
-constexpr uint32_t ArmCalleeSaveFpSpills(CalleeSaveType type) {
-  type = GetCanonicalCalleeSaveType(type);
-  return kArmCalleeSaveFpAlwaysSpills | kArmCalleeSaveFpRefSpills |
-      (type == CalleeSaveType::kSaveRefsAndArgs ? kArmCalleeSaveFpArgSpills : 0) |
-      (type == CalleeSaveType::kSaveAllCalleeSaves ? kArmCalleeSaveFpAllSpills : 0) |
-      (type == CalleeSaveType::kSaveEverything ? kArmCalleeSaveFpEverythingSpills : 0);
-}
-
-constexpr uint32_t ArmCalleeSaveFrameSize(CalleeSaveType type) {
-  type = GetCanonicalCalleeSaveType(type);
-  return RoundUp((POPCOUNT(ArmCalleeSaveCoreSpills(type)) /* gprs */ +
-                  POPCOUNT(ArmCalleeSaveFpSpills(type)) /* fprs */ +
-                  1 /* Method* */) * static_cast<size_t>(kArmPointerSize), kStackAlignment);
-}
-
-constexpr QuickMethodFrameInfo ArmCalleeSaveMethodFrameInfo(CalleeSaveType type) {
-  type = GetCanonicalCalleeSaveType(type);
-  return QuickMethodFrameInfo(ArmCalleeSaveFrameSize(type),
-                              ArmCalleeSaveCoreSpills(type),
-                              ArmCalleeSaveFpSpills(type));
-}
-
-constexpr size_t ArmCalleeSaveFpr1Offset(CalleeSaveType type) {
-  type = GetCanonicalCalleeSaveType(type);
-  return ArmCalleeSaveFrameSize(type) -
-         (POPCOUNT(ArmCalleeSaveCoreSpills(type)) +
-          POPCOUNT(ArmCalleeSaveFpSpills(type))) * static_cast<size_t>(kArmPointerSize);
-}
-
-constexpr size_t ArmCalleeSaveGpr1Offset(CalleeSaveType type) {
-  type = GetCanonicalCalleeSaveType(type);
-  return ArmCalleeSaveFrameSize(type) -
-         POPCOUNT(ArmCalleeSaveCoreSpills(type)) * static_cast<size_t>(kArmPointerSize);
-}
-
-constexpr size_t ArmCalleeSaveLrOffset(CalleeSaveType type) {
-  type = GetCanonicalCalleeSaveType(type);
-  return ArmCalleeSaveFrameSize(type) -
-      POPCOUNT(ArmCalleeSaveCoreSpills(type) & (-(1 << LR))) * static_cast<size_t>(kArmPointerSize);
-}
-
-}  // namespace arm
-}  // namespace art
-
-#endif  // ART_RUNTIME_ARCH_ARM_QUICK_METHOD_FRAME_INFO_ARM_H_
diff --git a/runtime/arch/arm64/quick_method_frame_info_arm64.h b/runtime/arch/arm64/callee_save_frame_arm64.h
similarity index 61%
rename from runtime/arch/arm64/quick_method_frame_info_arm64.h
rename to runtime/arch/arm64/callee_save_frame_arm64.h
index 2d2b500..bc36bfa 100644
--- a/runtime/arch/arm64/quick_method_frame_info_arm64.h
+++ b/runtime/arch/arm64/callee_save_frame_arm64.h
@@ -14,8 +14,8 @@
  * limitations under the License.
  */
 
-#ifndef ART_RUNTIME_ARCH_ARM64_QUICK_METHOD_FRAME_INFO_ARM64_H_
-#define ART_RUNTIME_ARCH_ARM64_QUICK_METHOD_FRAME_INFO_ARM64_H_
+#ifndef ART_RUNTIME_ARCH_ARM64_CALLEE_SAVE_FRAME_ARM64_H_
+#define ART_RUNTIME_ARCH_ARM64_CALLEE_SAVE_FRAME_ARM64_H_
 
 #include "arch/instruction_set.h"
 #include "base/bit_utils.h"
@@ -79,57 +79,56 @@
     (1 << art::arm64::D27) | (1 << art::arm64::D28) | (1 << art::arm64::D29) |
     (1 << art::arm64::D30) | (1 << art::arm64::D31);
 
-constexpr uint32_t Arm64CalleeSaveCoreSpills(CalleeSaveType type) {
-  type = GetCanonicalCalleeSaveType(type);
-  return kArm64CalleeSaveAlwaysSpills | kArm64CalleeSaveRefSpills |
-      (type == CalleeSaveType::kSaveRefsAndArgs ? kArm64CalleeSaveArgSpills : 0) |
-      (type == CalleeSaveType::kSaveAllCalleeSaves ? kArm64CalleeSaveAllSpills : 0) |
-      (type == CalleeSaveType::kSaveEverything ? kArm64CalleeSaveEverythingSpills : 0);
-}
+class Arm64CalleeSaveFrame {
+ public:
+  static constexpr uint32_t GetCoreSpills(CalleeSaveType type) {
+    type = GetCanonicalCalleeSaveType(type);
+    return kArm64CalleeSaveAlwaysSpills | kArm64CalleeSaveRefSpills |
+        (type == CalleeSaveType::kSaveRefsAndArgs ? kArm64CalleeSaveArgSpills : 0) |
+        (type == CalleeSaveType::kSaveAllCalleeSaves ? kArm64CalleeSaveAllSpills : 0) |
+        (type == CalleeSaveType::kSaveEverything ? kArm64CalleeSaveEverythingSpills : 0);
+  }
 
-constexpr uint32_t Arm64CalleeSaveFpSpills(CalleeSaveType type) {
-  type = GetCanonicalCalleeSaveType(type);
-  return kArm64CalleeSaveFpAlwaysSpills | kArm64CalleeSaveFpRefSpills |
-      (type == CalleeSaveType::kSaveRefsAndArgs ? kArm64CalleeSaveFpArgSpills : 0) |
-      (type == CalleeSaveType::kSaveAllCalleeSaves ? kArm64CalleeSaveFpAllSpills : 0) |
-      (type == CalleeSaveType::kSaveEverything ? kArm64CalleeSaveFpEverythingSpills : 0);
-}
+  static constexpr uint32_t GetFpSpills(CalleeSaveType type) {
+    type = GetCanonicalCalleeSaveType(type);
+    return kArm64CalleeSaveFpAlwaysSpills | kArm64CalleeSaveFpRefSpills |
+        (type == CalleeSaveType::kSaveRefsAndArgs ? kArm64CalleeSaveFpArgSpills : 0) |
+        (type == CalleeSaveType::kSaveAllCalleeSaves ? kArm64CalleeSaveFpAllSpills : 0) |
+        (type == CalleeSaveType::kSaveEverything ? kArm64CalleeSaveFpEverythingSpills : 0);
+  }
 
-constexpr uint32_t Arm64CalleeSaveFrameSize(CalleeSaveType type) {
-  type = GetCanonicalCalleeSaveType(type);
-  return RoundUp((POPCOUNT(Arm64CalleeSaveCoreSpills(type)) /* gprs */ +
-                  POPCOUNT(Arm64CalleeSaveFpSpills(type)) /* fprs */ +
-                  1 /* Method* */) * static_cast<size_t>(kArm64PointerSize), kStackAlignment);
-}
+  static constexpr uint32_t GetFrameSize(CalleeSaveType type) {
+    type = GetCanonicalCalleeSaveType(type);
+    return RoundUp((POPCOUNT(GetCoreSpills(type)) /* gprs */ +
+                    POPCOUNT(GetFpSpills(type)) /* fprs */ +
+                    1 /* Method* */) * static_cast<size_t>(kArm64PointerSize), kStackAlignment);
+  }
 
-constexpr QuickMethodFrameInfo Arm64CalleeSaveMethodFrameInfo(CalleeSaveType type) {
-  type = GetCanonicalCalleeSaveType(type);
-  return QuickMethodFrameInfo(Arm64CalleeSaveFrameSize(type),
-                              Arm64CalleeSaveCoreSpills(type),
-                              Arm64CalleeSaveFpSpills(type));
-}
+  static constexpr QuickMethodFrameInfo GetMethodFrameInfo(CalleeSaveType type) {
+    type = GetCanonicalCalleeSaveType(type);
+    return QuickMethodFrameInfo(GetFrameSize(type), GetCoreSpills(type), GetFpSpills(type));
+  }
 
-constexpr size_t Arm64CalleeSaveFpr1Offset(CalleeSaveType type) {
-  type = GetCanonicalCalleeSaveType(type);
-  return Arm64CalleeSaveFrameSize(type) -
-         (POPCOUNT(Arm64CalleeSaveCoreSpills(type)) +
-          POPCOUNT(Arm64CalleeSaveFpSpills(type))) * static_cast<size_t>(kArm64PointerSize);
-}
+  static constexpr size_t GetFpr1Offset(CalleeSaveType type) {
+    type = GetCanonicalCalleeSaveType(type);
+    return GetFrameSize(type) -
+           (POPCOUNT(GetCoreSpills(type)) +
+            POPCOUNT(GetFpSpills(type))) * static_cast<size_t>(kArm64PointerSize);
+  }
 
-constexpr size_t Arm64CalleeSaveGpr1Offset(CalleeSaveType type) {
-  type = GetCanonicalCalleeSaveType(type);
-  return Arm64CalleeSaveFrameSize(type) -
-         POPCOUNT(Arm64CalleeSaveCoreSpills(type)) * static_cast<size_t>(kArm64PointerSize);
-}
+  static constexpr size_t GetGpr1Offset(CalleeSaveType type) {
+    type = GetCanonicalCalleeSaveType(type);
+    return GetFrameSize(type) -
+           POPCOUNT(GetCoreSpills(type)) * static_cast<size_t>(kArm64PointerSize);
+  }
 
-constexpr size_t Arm64CalleeSaveLrOffset(CalleeSaveType type) {
-  type = GetCanonicalCalleeSaveType(type);
-  return Arm64CalleeSaveFrameSize(type) -
-      POPCOUNT(Arm64CalleeSaveCoreSpills(type) & (-(1 << LR))) *
-      static_cast<size_t>(kArm64PointerSize);
-}
+  static constexpr size_t GetReturnPcOffset(CalleeSaveType type) {
+    type = GetCanonicalCalleeSaveType(type);
+    return GetFrameSize(type) - static_cast<size_t>(kArm64PointerSize);
+  }
+};
 
 }  // namespace arm64
 }  // namespace art
 
-#endif  // ART_RUNTIME_ARCH_ARM64_QUICK_METHOD_FRAME_INFO_ARM64_H_
+#endif  // ART_RUNTIME_ARCH_ARM64_CALLEE_SAVE_FRAME_ARM64_H_
diff --git a/runtime/arch/mips/quick_method_frame_info_mips.h b/runtime/arch/mips/callee_save_frame_mips.h
similarity index 66%
rename from runtime/arch/mips/quick_method_frame_info_mips.h
rename to runtime/arch/mips/callee_save_frame_mips.h
index 8c86252..6e88d08 100644
--- a/runtime/arch/mips/quick_method_frame_info_mips.h
+++ b/runtime/arch/mips/callee_save_frame_mips.h
@@ -14,13 +14,14 @@
  * limitations under the License.
  */
 
-#ifndef ART_RUNTIME_ARCH_MIPS_QUICK_METHOD_FRAME_INFO_MIPS_H_
-#define ART_RUNTIME_ARCH_MIPS_QUICK_METHOD_FRAME_INFO_MIPS_H_
+#ifndef ART_RUNTIME_ARCH_MIPS_CALLEE_SAVE_FRAME_MIPS_H_
+#define ART_RUNTIME_ARCH_MIPS_CALLEE_SAVE_FRAME_MIPS_H_
 
 #include "arch/instruction_set.h"
 #include "base/bit_utils.h"
 #include "base/callee_save_type.h"
 #include "base/enums.h"
+#include "base/globals.h"
 #include "quick/quick_method_frame_info.h"
 #include "registers_mips.h"
 
@@ -80,37 +81,56 @@
     (1 << art::mips::F24) | (1 << art::mips::F25) | (1 << art::mips::F26) | (1 << art::mips::F27) |
     (1 << art::mips::F28) | (1 << art::mips::F29) | (1 << art::mips::F30) | (1u << art::mips::F31);
 
-constexpr uint32_t MipsCalleeSaveCoreSpills(CalleeSaveType type) {
-  type = GetCanonicalCalleeSaveType(type);
-  return kMipsCalleeSaveAlwaysSpills | kMipsCalleeSaveRefSpills |
-      (type == CalleeSaveType::kSaveRefsAndArgs ? kMipsCalleeSaveArgSpills : 0) |
-      (type == CalleeSaveType::kSaveAllCalleeSaves ? kMipsCalleeSaveAllSpills : 0) |
-      (type == CalleeSaveType::kSaveEverything ? kMipsCalleeSaveEverythingSpills : 0);
-}
+class MipsCalleeSaveFrame {
+ public:
+  static constexpr uint32_t GetCoreSpills(CalleeSaveType type) {
+    type = GetCanonicalCalleeSaveType(type);
+    return kMipsCalleeSaveAlwaysSpills | kMipsCalleeSaveRefSpills |
+        (type == CalleeSaveType::kSaveRefsAndArgs ? kMipsCalleeSaveArgSpills : 0) |
+        (type == CalleeSaveType::kSaveAllCalleeSaves ? kMipsCalleeSaveAllSpills : 0) |
+        (type == CalleeSaveType::kSaveEverything ? kMipsCalleeSaveEverythingSpills : 0);
+  }
 
-constexpr uint32_t MipsCalleeSaveFPSpills(CalleeSaveType type) {
-  type = GetCanonicalCalleeSaveType(type);
-  return kMipsCalleeSaveFpAlwaysSpills | kMipsCalleeSaveFpRefSpills |
-      (type == CalleeSaveType::kSaveRefsAndArgs ? kMipsCalleeSaveFpArgSpills : 0) |
-      (type == CalleeSaveType::kSaveAllCalleeSaves ? kMipsCalleeSaveAllFPSpills : 0) |
-      (type == CalleeSaveType::kSaveEverything ? kMipsCalleeSaveFpEverythingSpills : 0);
-}
+  static constexpr uint32_t GetFpSpills(CalleeSaveType type) {
+    type = GetCanonicalCalleeSaveType(type);
+    return kMipsCalleeSaveFpAlwaysSpills | kMipsCalleeSaveFpRefSpills |
+        (type == CalleeSaveType::kSaveRefsAndArgs ? kMipsCalleeSaveFpArgSpills : 0) |
+        (type == CalleeSaveType::kSaveAllCalleeSaves ? kMipsCalleeSaveAllFPSpills : 0) |
+        (type == CalleeSaveType::kSaveEverything ? kMipsCalleeSaveFpEverythingSpills : 0);
+  }
 
-constexpr uint32_t MipsCalleeSaveFrameSize(CalleeSaveType type) {
-  type = GetCanonicalCalleeSaveType(type);
-  return RoundUp((POPCOUNT(MipsCalleeSaveCoreSpills(type)) /* gprs */ +
-                  POPCOUNT(MipsCalleeSaveFPSpills(type))   /* fprs */ +
-                  1 /* Method* */) * static_cast<size_t>(kMipsPointerSize), kStackAlignment);
-}
+  static constexpr uint32_t GetFrameSize(CalleeSaveType type) {
+    type = GetCanonicalCalleeSaveType(type);
+    return RoundUp((POPCOUNT(GetCoreSpills(type)) /* gprs */ +
+                    POPCOUNT(GetFpSpills(type))   /* fprs */ +
+                    1 /* Method* */) * static_cast<size_t>(kMipsPointerSize), kStackAlignment);
+  }
 
-constexpr QuickMethodFrameInfo MipsCalleeSaveMethodFrameInfo(CalleeSaveType type) {
-  type = GetCanonicalCalleeSaveType(type);
-  return QuickMethodFrameInfo(MipsCalleeSaveFrameSize(type),
-                              MipsCalleeSaveCoreSpills(type),
-                              MipsCalleeSaveFPSpills(type));
-}
+  static constexpr QuickMethodFrameInfo GetMethodFrameInfo(CalleeSaveType type) {
+    type = GetCanonicalCalleeSaveType(type);
+    return QuickMethodFrameInfo(GetFrameSize(type), GetCoreSpills(type), GetFpSpills(type));
+  }
+
+  static constexpr size_t GetFpr1Offset(CalleeSaveType type) {
+    type = GetCanonicalCalleeSaveType(type);
+    return GetFrameSize(type) -
+           (POPCOUNT(GetCoreSpills(type)) +
+            POPCOUNT(GetFpSpills(type))) * static_cast<size_t>(kMipsPointerSize);
+  }
+
+  static constexpr size_t GetGpr1Offset(CalleeSaveType type) {
+    type = GetCanonicalCalleeSaveType(type);
+    return GetFrameSize(type) -
+           POPCOUNT(GetCoreSpills(type)) * static_cast<size_t>(kMipsPointerSize);
+  }
+
+  static constexpr size_t GetReturnPcOffset(CalleeSaveType type) {
+    type = GetCanonicalCalleeSaveType(type);
+    return GetFrameSize(type) - static_cast<size_t>(kMipsPointerSize);
+  }
+};
 
 }  // namespace mips
 }  // namespace art
 
-#endif  // ART_RUNTIME_ARCH_MIPS_QUICK_METHOD_FRAME_INFO_MIPS_H_
+#endif  // ART_RUNTIME_ARCH_MIPS_CALLEE_SAVE_FRAME_MIPS_H_
diff --git a/runtime/arch/mips/fault_handler_mips.cc b/runtime/arch/mips/fault_handler_mips.cc
index d5a9b15..7c8ac28 100644
--- a/runtime/arch/mips/fault_handler_mips.cc
+++ b/runtime/arch/mips/fault_handler_mips.cc
@@ -17,13 +17,13 @@
 #include <sys/ucontext.h>
 #include "fault_handler.h"
 
+#include "arch/mips/callee_save_frame_mips.h"
 #include "art_method.h"
 #include "base/callee_save_type.h"
 #include "base/globals.h"
 #include "base/hex_dump.h"
 #include "base/logging.h"  // For VLOG.
 #include "base/macros.h"
-#include "quick_method_frame_info_mips.h"
 #include "registers_mips.h"
 #include "thread-current-inl.h"
 
diff --git a/runtime/arch/mips64/quick_method_frame_info_mips64.h b/runtime/arch/mips64/callee_save_frame_mips64.h
similarity index 61%
rename from runtime/arch/mips64/quick_method_frame_info_mips64.h
rename to runtime/arch/mips64/callee_save_frame_mips64.h
index 520f631..59529a0 100644
--- a/runtime/arch/mips64/quick_method_frame_info_mips64.h
+++ b/runtime/arch/mips64/callee_save_frame_mips64.h
@@ -14,13 +14,14 @@
  * limitations under the License.
  */
 
-#ifndef ART_RUNTIME_ARCH_MIPS64_QUICK_METHOD_FRAME_INFO_MIPS64_H_
-#define ART_RUNTIME_ARCH_MIPS64_QUICK_METHOD_FRAME_INFO_MIPS64_H_
+#ifndef ART_RUNTIME_ARCH_MIPS64_CALLEE_SAVE_FRAME_MIPS64_H_
+#define ART_RUNTIME_ARCH_MIPS64_CALLEE_SAVE_FRAME_MIPS64_H_
 
 #include "arch/instruction_set.h"
 #include "base/bit_utils.h"
 #include "base/callee_save_type.h"
 #include "base/enums.h"
+#include "base/globals.h"
 #include "quick/quick_method_frame_info.h"
 #include "registers_mips64.h"
 
@@ -71,37 +72,56 @@
     (1 << art::mips64::F27) | (1 << art::mips64::F28) | (1 << art::mips64::F29) |
     (1 << art::mips64::F30) | (1 << art::mips64::F31);
 
-constexpr uint32_t Mips64CalleeSaveCoreSpills(CalleeSaveType type) {
-  type = GetCanonicalCalleeSaveType(type);
-  return kMips64CalleeSaveAlwaysSpills | kMips64CalleeSaveRefSpills |
-      (type == CalleeSaveType::kSaveRefsAndArgs ? kMips64CalleeSaveArgSpills : 0) |
-      (type == CalleeSaveType::kSaveAllCalleeSaves ? kMips64CalleeSaveAllSpills : 0) |
-      (type == CalleeSaveType::kSaveEverything ? kMips64CalleeSaveEverythingSpills : 0);
-}
+class Mips64CalleeSaveFrame {
+ public:
+  static constexpr uint32_t GetCoreSpills(CalleeSaveType type) {
+    type = GetCanonicalCalleeSaveType(type);
+    return kMips64CalleeSaveAlwaysSpills | kMips64CalleeSaveRefSpills |
+        (type == CalleeSaveType::kSaveRefsAndArgs ? kMips64CalleeSaveArgSpills : 0) |
+        (type == CalleeSaveType::kSaveAllCalleeSaves ? kMips64CalleeSaveAllSpills : 0) |
+        (type == CalleeSaveType::kSaveEverything ? kMips64CalleeSaveEverythingSpills : 0);
+  }
 
-constexpr uint32_t Mips64CalleeSaveFpSpills(CalleeSaveType type) {
-  type = GetCanonicalCalleeSaveType(type);
-  return kMips64CalleeSaveFpRefSpills |
-      (type == CalleeSaveType::kSaveRefsAndArgs ? kMips64CalleeSaveFpArgSpills : 0) |
-      (type == CalleeSaveType::kSaveAllCalleeSaves ? kMips64CalleeSaveFpAllSpills : 0) |
-      (type == CalleeSaveType::kSaveEverything ? kMips64CalleeSaveFpEverythingSpills : 0);
-}
+  static constexpr uint32_t GetFpSpills(CalleeSaveType type) {
+    type = GetCanonicalCalleeSaveType(type);
+    return kMips64CalleeSaveFpRefSpills |
+        (type == CalleeSaveType::kSaveRefsAndArgs ? kMips64CalleeSaveFpArgSpills : 0) |
+        (type == CalleeSaveType::kSaveAllCalleeSaves ? kMips64CalleeSaveFpAllSpills : 0) |
+        (type == CalleeSaveType::kSaveEverything ? kMips64CalleeSaveFpEverythingSpills : 0);
+  }
 
-constexpr uint32_t Mips64CalleeSaveFrameSize(CalleeSaveType type) {
-  type = GetCanonicalCalleeSaveType(type);
-  return RoundUp((POPCOUNT(Mips64CalleeSaveCoreSpills(type)) /* gprs */ +
-                  POPCOUNT(Mips64CalleeSaveFpSpills(type))   /* fprs */ +
-                  + 1 /* Method* */) * static_cast<size_t>(kMips64PointerSize), kStackAlignment);
-}
+  static constexpr uint32_t GetFrameSize(CalleeSaveType type) {
+    type = GetCanonicalCalleeSaveType(type);
+    return RoundUp((POPCOUNT(GetCoreSpills(type)) /* gprs */ +
+                    POPCOUNT(GetFpSpills(type))   /* fprs */ +
+                    + 1 /* Method* */) * static_cast<size_t>(kMips64PointerSize), kStackAlignment);
+  }
 
-constexpr QuickMethodFrameInfo Mips64CalleeSaveMethodFrameInfo(CalleeSaveType type) {
-  type = GetCanonicalCalleeSaveType(type);
-  return QuickMethodFrameInfo(Mips64CalleeSaveFrameSize(type),
-                              Mips64CalleeSaveCoreSpills(type),
-                              Mips64CalleeSaveFpSpills(type));
-}
+  static constexpr QuickMethodFrameInfo GetMethodFrameInfo(CalleeSaveType type) {
+    type = GetCanonicalCalleeSaveType(type);
+    return QuickMethodFrameInfo(GetFrameSize(type), GetCoreSpills(type), GetFpSpills(type));
+  }
+
+  static constexpr size_t GetFpr1Offset(CalleeSaveType type) {
+    type = GetCanonicalCalleeSaveType(type);
+    return GetFrameSize(type) -
+           (POPCOUNT(GetCoreSpills(type)) +
+            POPCOUNT(GetFpSpills(type))) * static_cast<size_t>(kMips64PointerSize);
+  }
+
+  static constexpr size_t GetGpr1Offset(CalleeSaveType type) {
+    type = GetCanonicalCalleeSaveType(type);
+    return GetFrameSize(type) -
+           POPCOUNT(GetCoreSpills(type)) * static_cast<size_t>(kMips64PointerSize);
+  }
+
+  static constexpr size_t GetReturnPcOffset(CalleeSaveType type) {
+    type = GetCanonicalCalleeSaveType(type);
+    return GetFrameSize(type) - static_cast<size_t>(kMips64PointerSize);
+  }
+};
 
 }  // namespace mips64
 }  // namespace art
 
-#endif  // ART_RUNTIME_ARCH_MIPS64_QUICK_METHOD_FRAME_INFO_MIPS64_H_
+#endif  // ART_RUNTIME_ARCH_MIPS64_CALLEE_SAVE_FRAME_MIPS64_H_
diff --git a/runtime/arch/mips64/fault_handler_mips64.cc b/runtime/arch/mips64/fault_handler_mips64.cc
index 695da47..85f3528 100644
--- a/runtime/arch/mips64/fault_handler_mips64.cc
+++ b/runtime/arch/mips64/fault_handler_mips64.cc
@@ -18,13 +18,13 @@
 
 #include <sys/ucontext.h>
 
+#include "arch/mips64/callee_save_frame_mips64.h"
 #include "art_method.h"
 #include "base/callee_save_type.h"
 #include "base/globals.h"
 #include "base/hex_dump.h"
 #include "base/logging.h"  // For VLOG.
 #include "base/macros.h"
-#include "quick_method_frame_info_mips64.h"
 #include "registers_mips64.h"
 #include "thread-current-inl.h"
 
diff --git a/runtime/arch/x86/callee_save_frame_x86.h b/runtime/arch/x86/callee_save_frame_x86.h
new file mode 100644
index 0000000..f336f43
--- /dev/null
+++ b/runtime/arch/x86/callee_save_frame_x86.h
@@ -0,0 +1,98 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ART_RUNTIME_ARCH_X86_CALLEE_SAVE_FRAME_X86_H_
+#define ART_RUNTIME_ARCH_X86_CALLEE_SAVE_FRAME_X86_H_
+
+#include "arch/instruction_set.h"
+#include "base/bit_utils.h"
+#include "base/callee_save_type.h"
+#include "base/enums.h"
+#include "base/globals.h"
+#include "quick/quick_method_frame_info.h"
+#include "registers_x86.h"
+
+namespace art {
+namespace x86 {
+
+static constexpr uint32_t kX86CalleeSaveAlwaysSpills =
+    (1 << art::x86::kNumberOfCpuRegisters);  // Fake return address callee save.
+static constexpr uint32_t kX86CalleeSaveRefSpills =
+    (1 << art::x86::EBP) | (1 << art::x86::ESI) | (1 << art::x86::EDI);
+static constexpr uint32_t kX86CalleeSaveArgSpills =
+    (1 << art::x86::ECX) | (1 << art::x86::EDX) | (1 << art::x86::EBX);
+static constexpr uint32_t kX86CalleeSaveEverythingSpills =
+    (1 << art::x86::EAX) | (1 << art::x86::ECX) | (1 << art::x86::EDX) | (1 << art::x86::EBX);
+
+static constexpr uint32_t kX86CalleeSaveFpArgSpills =
+    (1 << art::x86::XMM0) | (1 << art::x86::XMM1) |
+    (1 << art::x86::XMM2) | (1 << art::x86::XMM3);
+static constexpr uint32_t kX86CalleeSaveFpEverythingSpills =
+    (1 << art::x86::XMM0) | (1 << art::x86::XMM1) |
+    (1 << art::x86::XMM2) | (1 << art::x86::XMM3) |
+    (1 << art::x86::XMM4) | (1 << art::x86::XMM5) |
+    (1 << art::x86::XMM6) | (1 << art::x86::XMM7);
+
+class X86CalleeSaveFrame {
+ public:
+  static constexpr uint32_t GetCoreSpills(CalleeSaveType type) {
+    type = GetCanonicalCalleeSaveType(type);
+    return kX86CalleeSaveAlwaysSpills | kX86CalleeSaveRefSpills |
+        (type == CalleeSaveType::kSaveRefsAndArgs ? kX86CalleeSaveArgSpills : 0) |
+        (type == CalleeSaveType::kSaveEverything ? kX86CalleeSaveEverythingSpills : 0);
+  }
+
+  static constexpr uint32_t GetFpSpills(CalleeSaveType type) {
+    type = GetCanonicalCalleeSaveType(type);
+    return (type == CalleeSaveType::kSaveRefsAndArgs ? kX86CalleeSaveFpArgSpills : 0) |
+           (type == CalleeSaveType::kSaveEverything ? kX86CalleeSaveFpEverythingSpills : 0);
+  }
+
+  static constexpr uint32_t GetFrameSize(CalleeSaveType type) {
+    type = GetCanonicalCalleeSaveType(type);
+    return RoundUp((POPCOUNT(GetCoreSpills(type)) /* gprs */ +
+                    2 * POPCOUNT(GetFpSpills(type)) /* fprs */ +
+                    1 /* Method* */) * static_cast<size_t>(kX86PointerSize), kStackAlignment);
+  }
+
+  static constexpr QuickMethodFrameInfo GetMethodFrameInfo(CalleeSaveType type) {
+    type = GetCanonicalCalleeSaveType(type);
+    return QuickMethodFrameInfo(GetFrameSize(type), GetCoreSpills(type), GetFpSpills(type));
+  }
+
+  static constexpr size_t GetFpr1Offset(CalleeSaveType type) {
+    type = GetCanonicalCalleeSaveType(type);
+    return GetFrameSize(type) -
+           (POPCOUNT(GetCoreSpills(type)) +
+            2 * POPCOUNT(GetFpSpills(type))) * static_cast<size_t>(kX86PointerSize);
+  }
+
+  static constexpr size_t GetGpr1Offset(CalleeSaveType type) {
+    type = GetCanonicalCalleeSaveType(type);
+    return GetFrameSize(type) -
+           POPCOUNT(GetCoreSpills(type)) * static_cast<size_t>(kX86PointerSize);
+  }
+
+  static constexpr size_t GetReturnPcOffset(CalleeSaveType type) {
+    type = GetCanonicalCalleeSaveType(type);
+    return GetFrameSize(type) - static_cast<size_t>(kX86PointerSize);
+  }
+};
+
+}  // namespace x86
+}  // namespace art
+
+#endif  // ART_RUNTIME_ARCH_X86_CALLEE_SAVE_FRAME_X86_H_
diff --git a/runtime/arch/x86/quick_method_frame_info_x86.h b/runtime/arch/x86/quick_method_frame_info_x86.h
deleted file mode 100644
index 9a66333..0000000
--- a/runtime/arch/x86/quick_method_frame_info_x86.h
+++ /dev/null
@@ -1,89 +0,0 @@
-/*
- * Copyright (C) 2014 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef ART_RUNTIME_ARCH_X86_QUICK_METHOD_FRAME_INFO_X86_H_
-#define ART_RUNTIME_ARCH_X86_QUICK_METHOD_FRAME_INFO_X86_H_
-
-#include "arch/instruction_set.h"
-#include "base/bit_utils.h"
-#include "base/callee_save_type.h"
-#include "base/enums.h"
-#include "quick/quick_method_frame_info.h"
-#include "registers_x86.h"
-
-namespace art {
-namespace x86 {
-
-enum XMM {
-  XMM0 = 0,
-  XMM1 = 1,
-  XMM2 = 2,
-  XMM3 = 3,
-  XMM4 = 4,
-  XMM5 = 5,
-  XMM6 = 6,
-  XMM7 = 7,
-};
-
-static constexpr uint32_t kX86CalleeSaveAlwaysSpills =
-    (1 << art::x86::kNumberOfCpuRegisters);  // Fake return address callee save.
-static constexpr uint32_t kX86CalleeSaveRefSpills =
-    (1 << art::x86::EBP) | (1 << art::x86::ESI) | (1 << art::x86::EDI);
-static constexpr uint32_t kX86CalleeSaveArgSpills =
-    (1 << art::x86::ECX) | (1 << art::x86::EDX) | (1 << art::x86::EBX);
-static constexpr uint32_t kX86CalleeSaveEverythingSpills =
-    (1 << art::x86::EAX) | (1 << art::x86::ECX) | (1 << art::x86::EDX) | (1 << art::x86::EBX);
-
-static constexpr uint32_t kX86CalleeSaveFpArgSpills =
-    (1 << art::x86::XMM0) | (1 << art::x86::XMM1) |
-    (1 << art::x86::XMM2) | (1 << art::x86::XMM3);
-static constexpr uint32_t kX86CalleeSaveFpEverythingSpills =
-    (1 << art::x86::XMM0) | (1 << art::x86::XMM1) |
-    (1 << art::x86::XMM2) | (1 << art::x86::XMM3) |
-    (1 << art::x86::XMM4) | (1 << art::x86::XMM5) |
-    (1 << art::x86::XMM6) | (1 << art::x86::XMM7);
-
-constexpr uint32_t X86CalleeSaveCoreSpills(CalleeSaveType type) {
-  type = GetCanonicalCalleeSaveType(type);
-  return kX86CalleeSaveAlwaysSpills | kX86CalleeSaveRefSpills |
-      (type == CalleeSaveType::kSaveRefsAndArgs ? kX86CalleeSaveArgSpills : 0) |
-      (type == CalleeSaveType::kSaveEverything ? kX86CalleeSaveEverythingSpills : 0);
-}
-
-constexpr uint32_t X86CalleeSaveFpSpills(CalleeSaveType type) {
-  type = GetCanonicalCalleeSaveType(type);
-  return (type == CalleeSaveType::kSaveRefsAndArgs ? kX86CalleeSaveFpArgSpills : 0) |
-         (type == CalleeSaveType::kSaveEverything ? kX86CalleeSaveFpEverythingSpills : 0);
-}
-
-constexpr uint32_t X86CalleeSaveFrameSize(CalleeSaveType type) {
-  type = GetCanonicalCalleeSaveType(type);
-  return RoundUp((POPCOUNT(X86CalleeSaveCoreSpills(type)) /* gprs */ +
-                  2 * POPCOUNT(X86CalleeSaveFpSpills(type)) /* fprs */ +
-                  1 /* Method* */) * static_cast<size_t>(kX86PointerSize), kStackAlignment);
-}
-
-constexpr QuickMethodFrameInfo X86CalleeSaveMethodFrameInfo(CalleeSaveType type) {
-  type = GetCanonicalCalleeSaveType(type);
-  return QuickMethodFrameInfo(X86CalleeSaveFrameSize(type),
-                              X86CalleeSaveCoreSpills(type),
-                              X86CalleeSaveFpSpills(type));
-}
-
-}  // namespace x86
-}  // namespace art
-
-#endif  // ART_RUNTIME_ARCH_X86_QUICK_METHOD_FRAME_INFO_X86_H_
diff --git a/runtime/arch/x86/registers_x86.h b/runtime/arch/x86/registers_x86.h
index 5a5d226..d3b959f 100644
--- a/runtime/arch/x86/registers_x86.h
+++ b/runtime/arch/x86/registers_x86.h
@@ -42,6 +42,20 @@
 };
 std::ostream& operator<<(std::ostream& os, const Register& rhs);
 
+enum XmmRegister {
+  XMM0 = 0,
+  XMM1 = 1,
+  XMM2 = 2,
+  XMM3 = 3,
+  XMM4 = 4,
+  XMM5 = 5,
+  XMM6 = 6,
+  XMM7 = 7,
+  kNumberOfXmmRegisters = 8,
+  kNoXmmRegister = -1  // Signals an illegal register.
+};
+std::ostream& operator<<(std::ostream& os, const XmmRegister& reg);
+
 }  // namespace x86
 }  // namespace art
 
diff --git a/runtime/arch/x86_64/callee_save_frame_x86_64.h b/runtime/arch/x86_64/callee_save_frame_x86_64.h
new file mode 100644
index 0000000..228a902
--- /dev/null
+++ b/runtime/arch/x86_64/callee_save_frame_x86_64.h
@@ -0,0 +1,109 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ART_RUNTIME_ARCH_X86_64_CALLEE_SAVE_FRAME_X86_64_H_
+#define ART_RUNTIME_ARCH_X86_64_CALLEE_SAVE_FRAME_X86_64_H_
+
+#include "arch/instruction_set.h"
+#include "base/bit_utils.h"
+#include "base/callee_save_type.h"
+#include "base/enums.h"
+#include "base/globals.h"
+#include "quick/quick_method_frame_info.h"
+#include "registers_x86_64.h"
+
+namespace art {
+namespace x86_64 {
+
+static constexpr uint32_t kX86_64CalleeSaveAlwaysSpills =
+    (1 << art::x86_64::kNumberOfCpuRegisters);  // Fake return address callee save.
+static constexpr uint32_t kX86_64CalleeSaveRefSpills =
+    (1 << art::x86_64::RBX) | (1 << art::x86_64::RBP) | (1 << art::x86_64::R12) |
+    (1 << art::x86_64::R13) | (1 << art::x86_64::R14) | (1 << art::x86_64::R15);
+static constexpr uint32_t kX86_64CalleeSaveArgSpills =
+    (1 << art::x86_64::RSI) | (1 << art::x86_64::RDX) | (1 << art::x86_64::RCX) |
+    (1 << art::x86_64::R8) | (1 << art::x86_64::R9);
+static constexpr uint32_t kX86_64CalleeSaveEverythingSpills =
+    (1 << art::x86_64::RAX) | (1 << art::x86_64::RCX) | (1 << art::x86_64::RDX) |
+    (1 << art::x86_64::RSI) | (1 << art::x86_64::RDI) | (1 << art::x86_64::R8) |
+    (1 << art::x86_64::R9) | (1 << art::x86_64::R10) | (1 << art::x86_64::R11);
+
+static constexpr uint32_t kX86_64CalleeSaveFpArgSpills =
+    (1 << art::x86_64::XMM0) | (1 << art::x86_64::XMM1) | (1 << art::x86_64::XMM2) |
+    (1 << art::x86_64::XMM3) | (1 << art::x86_64::XMM4) | (1 << art::x86_64::XMM5) |
+    (1 << art::x86_64::XMM6) | (1 << art::x86_64::XMM7);
+static constexpr uint32_t kX86_64CalleeSaveFpSpills =
+    (1 << art::x86_64::XMM12) | (1 << art::x86_64::XMM13) |
+    (1 << art::x86_64::XMM14) | (1 << art::x86_64::XMM15);
+static constexpr uint32_t kX86_64CalleeSaveFpEverythingSpills =
+    (1 << art::x86_64::XMM0) | (1 << art::x86_64::XMM1) |
+    (1 << art::x86_64::XMM2) | (1 << art::x86_64::XMM3) |
+    (1 << art::x86_64::XMM4) | (1 << art::x86_64::XMM5) |
+    (1 << art::x86_64::XMM6) | (1 << art::x86_64::XMM7) |
+    (1 << art::x86_64::XMM8) | (1 << art::x86_64::XMM9) |
+    (1 << art::x86_64::XMM10) | (1 << art::x86_64::XMM11);
+
+class X86_64CalleeSaveFrame {
+ public:
+  static constexpr uint32_t GetCoreSpills(CalleeSaveType type) {
+    type = GetCanonicalCalleeSaveType(type);
+    return kX86_64CalleeSaveAlwaysSpills | kX86_64CalleeSaveRefSpills |
+        (type == CalleeSaveType::kSaveRefsAndArgs ? kX86_64CalleeSaveArgSpills : 0) |
+        (type == CalleeSaveType::kSaveEverything ? kX86_64CalleeSaveEverythingSpills : 0);
+  }
+
+  static constexpr uint32_t GetFpSpills(CalleeSaveType type) {
+    type = GetCanonicalCalleeSaveType(type);
+    return kX86_64CalleeSaveFpSpills |
+        (type == CalleeSaveType::kSaveRefsAndArgs ? kX86_64CalleeSaveFpArgSpills : 0) |
+        (type == CalleeSaveType::kSaveEverything ? kX86_64CalleeSaveFpEverythingSpills : 0);
+  }
+
+  static constexpr uint32_t GetFrameSize(CalleeSaveType type) {
+    type = GetCanonicalCalleeSaveType(type);
+    return RoundUp((POPCOUNT(GetCoreSpills(type)) /* gprs */ +
+                    POPCOUNT(GetFpSpills(type)) /* fprs */ +
+                    1 /* Method* */) * static_cast<size_t>(kX86_64PointerSize), kStackAlignment);
+  }
+
+  static constexpr QuickMethodFrameInfo GetMethodFrameInfo(CalleeSaveType type) {
+    type = GetCanonicalCalleeSaveType(type);
+    return QuickMethodFrameInfo(GetFrameSize(type), GetCoreSpills(type), GetFpSpills(type));
+  }
+
+  static constexpr size_t GetFpr1Offset(CalleeSaveType type) {
+    type = GetCanonicalCalleeSaveType(type);
+    return GetFrameSize(type) -
+           (POPCOUNT(GetCoreSpills(type)) +
+            POPCOUNT(GetFpSpills(type))) * static_cast<size_t>(kX86_64PointerSize);
+  }
+
+  static constexpr size_t GetGpr1Offset(CalleeSaveType type) {
+    type = GetCanonicalCalleeSaveType(type);
+    return GetFrameSize(type) -
+           POPCOUNT(GetCoreSpills(type)) * static_cast<size_t>(kX86_64PointerSize);
+  }
+
+  static constexpr size_t GetReturnPcOffset(CalleeSaveType type) {
+    type = GetCanonicalCalleeSaveType(type);
+    return GetFrameSize(type) - static_cast<size_t>(kX86_64PointerSize);
+  }
+};
+
+}  // namespace x86_64
+}  // namespace art
+
+#endif  // ART_RUNTIME_ARCH_X86_64_CALLEE_SAVE_FRAME_X86_64_H_
diff --git a/runtime/arch/x86_64/quick_method_frame_info_x86_64.h b/runtime/arch/x86_64/quick_method_frame_info_x86_64.h
deleted file mode 100644
index ebf976e..0000000
--- a/runtime/arch/x86_64/quick_method_frame_info_x86_64.h
+++ /dev/null
@@ -1,89 +0,0 @@
-/*
- * Copyright (C) 2014 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef ART_RUNTIME_ARCH_X86_64_QUICK_METHOD_FRAME_INFO_X86_64_H_
-#define ART_RUNTIME_ARCH_X86_64_QUICK_METHOD_FRAME_INFO_X86_64_H_
-
-#include "arch/instruction_set.h"
-#include "base/bit_utils.h"
-#include "base/callee_save_type.h"
-#include "base/enums.h"
-#include "quick/quick_method_frame_info.h"
-#include "registers_x86_64.h"
-
-namespace art {
-namespace x86_64 {
-
-static constexpr uint32_t kX86_64CalleeSaveAlwaysSpills =
-    (1 << art::x86_64::kNumberOfCpuRegisters);  // Fake return address callee save.
-static constexpr uint32_t kX86_64CalleeSaveRefSpills =
-    (1 << art::x86_64::RBX) | (1 << art::x86_64::RBP) | (1 << art::x86_64::R12) |
-    (1 << art::x86_64::R13) | (1 << art::x86_64::R14) | (1 << art::x86_64::R15);
-static constexpr uint32_t kX86_64CalleeSaveArgSpills =
-    (1 << art::x86_64::RSI) | (1 << art::x86_64::RDX) | (1 << art::x86_64::RCX) |
-    (1 << art::x86_64::R8) | (1 << art::x86_64::R9);
-static constexpr uint32_t kX86_64CalleeSaveEverythingSpills =
-    (1 << art::x86_64::RAX) | (1 << art::x86_64::RCX) | (1 << art::x86_64::RDX) |
-    (1 << art::x86_64::RSI) | (1 << art::x86_64::RDI) | (1 << art::x86_64::R8) |
-    (1 << art::x86_64::R9) | (1 << art::x86_64::R10) | (1 << art::x86_64::R11);
-
-static constexpr uint32_t kX86_64CalleeSaveFpArgSpills =
-    (1 << art::x86_64::XMM0) | (1 << art::x86_64::XMM1) | (1 << art::x86_64::XMM2) |
-    (1 << art::x86_64::XMM3) | (1 << art::x86_64::XMM4) | (1 << art::x86_64::XMM5) |
-    (1 << art::x86_64::XMM6) | (1 << art::x86_64::XMM7);
-static constexpr uint32_t kX86_64CalleeSaveFpSpills =
-    (1 << art::x86_64::XMM12) | (1 << art::x86_64::XMM13) |
-    (1 << art::x86_64::XMM14) | (1 << art::x86_64::XMM15);
-static constexpr uint32_t kX86_64CalleeSaveFpEverythingSpills =
-    (1 << art::x86_64::XMM0) | (1 << art::x86_64::XMM1) |
-    (1 << art::x86_64::XMM2) | (1 << art::x86_64::XMM3) |
-    (1 << art::x86_64::XMM4) | (1 << art::x86_64::XMM5) |
-    (1 << art::x86_64::XMM6) | (1 << art::x86_64::XMM7) |
-    (1 << art::x86_64::XMM8) | (1 << art::x86_64::XMM9) |
-    (1 << art::x86_64::XMM10) | (1 << art::x86_64::XMM11);
-
-constexpr uint32_t X86_64CalleeSaveCoreSpills(CalleeSaveType type) {
-  type = GetCanonicalCalleeSaveType(type);
-  return kX86_64CalleeSaveAlwaysSpills | kX86_64CalleeSaveRefSpills |
-      (type == CalleeSaveType::kSaveRefsAndArgs ? kX86_64CalleeSaveArgSpills : 0) |
-      (type == CalleeSaveType::kSaveEverything ? kX86_64CalleeSaveEverythingSpills : 0);
-}
-
-constexpr uint32_t X86_64CalleeSaveFpSpills(CalleeSaveType type) {
-  type = GetCanonicalCalleeSaveType(type);
-  return kX86_64CalleeSaveFpSpills |
-      (type == CalleeSaveType::kSaveRefsAndArgs ? kX86_64CalleeSaveFpArgSpills : 0) |
-      (type == CalleeSaveType::kSaveEverything ? kX86_64CalleeSaveFpEverythingSpills : 0);
-}
-
-constexpr uint32_t X86_64CalleeSaveFrameSize(CalleeSaveType type) {
-  type = GetCanonicalCalleeSaveType(type);
-  return RoundUp((POPCOUNT(X86_64CalleeSaveCoreSpills(type)) /* gprs */ +
-                  POPCOUNT(X86_64CalleeSaveFpSpills(type)) /* fprs */ +
-                  1 /* Method* */) * static_cast<size_t>(kX86_64PointerSize), kStackAlignment);
-}
-
-constexpr QuickMethodFrameInfo X86_64CalleeSaveMethodFrameInfo(CalleeSaveType type) {
-  type = GetCanonicalCalleeSaveType(type);
-  return QuickMethodFrameInfo(X86_64CalleeSaveFrameSize(type),
-                              X86_64CalleeSaveCoreSpills(type),
-                              X86_64CalleeSaveFpSpills(type));
-}
-
-}  // namespace x86_64
-}  // namespace art
-
-#endif  // ART_RUNTIME_ARCH_X86_64_QUICK_METHOD_FRAME_INFO_X86_64_H_
diff --git a/runtime/check_reference_map_visitor.h b/runtime/check_reference_map_visitor.h
index e2ad7fd..6917899 100644
--- a/runtime/check_reference_map_visitor.h
+++ b/runtime/check_reference_map_visitor.h
@@ -64,20 +64,19 @@
   void CheckOptimizedMethod(int* registers, int number_of_references, uint32_t native_pc_offset)
       REQUIRES_SHARED(Locks::mutator_lock_) {
     ArtMethod* m = GetMethod();
-    CodeInfo code_info = GetCurrentOatQuickMethodHeader()->GetOptimizedCodeInfo();
-    CodeInfoEncoding encoding = code_info.ExtractEncoding();
-    StackMap stack_map = code_info.GetStackMapForNativePcOffset(native_pc_offset, encoding);
+    CodeInfo code_info(GetCurrentOatQuickMethodHeader());
+    StackMap stack_map = code_info.GetStackMapForNativePcOffset(native_pc_offset);
     CodeItemDataAccessor accessor(m->DexInstructionData());
     uint16_t number_of_dex_registers = accessor.RegistersSize();
     DexRegisterMap dex_register_map =
-        code_info.GetDexRegisterMapOf(stack_map, encoding, number_of_dex_registers);
-    uint32_t register_mask = code_info.GetRegisterMaskOf(encoding, stack_map);
-    BitMemoryRegion stack_mask = code_info.GetStackMaskOf(encoding, stack_map);
+        code_info.GetDexRegisterMapOf(stack_map, number_of_dex_registers);
+    uint32_t register_mask = code_info.GetRegisterMaskOf(stack_map);
+    BitMemoryRegion stack_mask = code_info.GetStackMaskOf(stack_map);
     for (int i = 0; i < number_of_references; ++i) {
       int reg = registers[i];
       CHECK_LT(reg, accessor.RegistersSize());
       DexRegisterLocation location = dex_register_map.GetDexRegisterLocation(
-          reg, number_of_dex_registers, code_info, encoding);
+          reg, number_of_dex_registers, code_info);
       switch (location.GetKind()) {
         case DexRegisterLocation::Kind::kNone:
           // Not set, should not be a reference.
diff --git a/runtime/entrypoints/entrypoint_utils-inl.h b/runtime/entrypoints/entrypoint_utils-inl.h
index d4e7492..f6b1c73 100644
--- a/runtime/entrypoints/entrypoint_utils-inl.h
+++ b/runtime/entrypoints/entrypoint_utils-inl.h
@@ -47,7 +47,6 @@
 inline ArtMethod* GetResolvedMethod(ArtMethod* outer_method,
                                     const MethodInfo& method_info,
                                     const InlineInfo& inline_info,
-                                    const InlineInfoEncoding& encoding,
                                     uint8_t inlining_depth)
     REQUIRES_SHARED(Locks::mutator_lock_) {
   DCHECK(!outer_method->IsObsolete());
@@ -57,12 +56,12 @@
   // suspended while executing it.
   ScopedAssertNoThreadSuspension sants(__FUNCTION__);
 
-  if (inline_info.EncodesArtMethodAtDepth(encoding, inlining_depth)) {
-    return inline_info.GetArtMethodAtDepth(encoding, inlining_depth);
+  if (inline_info.EncodesArtMethodAtDepth(inlining_depth)) {
+    return inline_info.GetArtMethodAtDepth(inlining_depth);
   }
 
-  uint32_t method_index = inline_info.GetMethodIndexAtDepth(encoding, method_info, inlining_depth);
-  if (inline_info.GetDexPcAtDepth(encoding, inlining_depth) == static_cast<uint32_t>(-1)) {
+  uint32_t method_index = inline_info.GetMethodIndexAtDepth(method_info, inlining_depth);
+  if (inline_info.GetDexPcAtDepth(inlining_depth) == static_cast<uint32_t>(-1)) {
     // "charAt" special case. It is the only non-leaf method we inline across dex files.
     ArtMethod* inlined_method = jni::DecodeArtMethod(WellKnownClasses::java_lang_String_charAt);
     DCHECK_EQ(inlined_method->GetDexMethodIndex(), method_index);
@@ -73,9 +72,9 @@
   ClassLinker* class_linker = Runtime::Current()->GetClassLinker();
   ArtMethod* method = outer_method;
   for (uint32_t depth = 0, end = inlining_depth + 1u; depth != end; ++depth) {
-    DCHECK(!inline_info.EncodesArtMethodAtDepth(encoding, depth));
-    DCHECK_NE(inline_info.GetDexPcAtDepth(encoding, depth), static_cast<uint32_t>(-1));
-    method_index = inline_info.GetMethodIndexAtDepth(encoding, method_info, depth);
+    DCHECK(!inline_info.EncodesArtMethodAtDepth(depth));
+    DCHECK_NE(inline_info.GetDexPcAtDepth(depth), static_cast<uint32_t>(-1));
+    method_index = inline_info.GetMethodIndexAtDepth(method_info, depth);
     ArtMethod* inlined_method = class_linker->LookupResolvedMethod(method_index,
                                                                    method->GetDexCache(),
                                                                    method->GetClassLoader());
diff --git a/runtime/entrypoints/entrypoint_utils.cc b/runtime/entrypoints/entrypoint_utils.cc
index 7fc8db3..7f9b385 100644
--- a/runtime/entrypoints/entrypoint_utils.cc
+++ b/runtime/entrypoints/entrypoint_utils.cc
@@ -180,10 +180,10 @@
     ArtMethod** sp, CalleeSaveType type) REQUIRES_SHARED(Locks::mutator_lock_) {
   DCHECK_EQ(*sp, Runtime::Current()->GetCalleeSaveMethod(type));
 
-  const size_t callee_frame_size = GetCalleeSaveFrameSize(kRuntimeISA, type);
+  const size_t callee_frame_size = RuntimeCalleeSaveFrame::GetFrameSize(type);
   auto** caller_sp = reinterpret_cast<ArtMethod**>(
       reinterpret_cast<uintptr_t>(sp) + callee_frame_size);
-  const size_t callee_return_pc_offset = GetCalleeSaveReturnPcOffset(kRuntimeISA, type);
+  const size_t callee_return_pc_offset = RuntimeCalleeSaveFrame::GetReturnPcOffset(type);
   uintptr_t caller_pc = *reinterpret_cast<uintptr_t*>(
       (reinterpret_cast<uint8_t*>(sp) + callee_return_pc_offset));
   ArtMethod* outer_method = *caller_sp;
@@ -201,18 +201,16 @@
       DCHECK(current_code != nullptr);
       DCHECK(current_code->IsOptimized());
       uintptr_t native_pc_offset = current_code->NativeQuickPcOffset(caller_pc);
-      CodeInfo code_info = current_code->GetOptimizedCodeInfo();
+      CodeInfo code_info(current_code);
       MethodInfo method_info = current_code->GetOptimizedMethodInfo();
-      CodeInfoEncoding encoding = code_info.ExtractEncoding();
-      StackMap stack_map = code_info.GetStackMapForNativePcOffset(native_pc_offset, encoding);
+      StackMap stack_map = code_info.GetStackMapForNativePcOffset(native_pc_offset);
       DCHECK(stack_map.IsValid());
-      if (stack_map.HasInlineInfo(encoding.stack_map.encoding)) {
-        InlineInfo inline_info = code_info.GetInlineInfoOf(stack_map, encoding);
+      if (stack_map.HasInlineInfo()) {
+        InlineInfo inline_info = code_info.GetInlineInfoOf(stack_map);
         caller = GetResolvedMethod(outer_method,
                                    method_info,
                                    inline_info,
-                                   encoding.inline_info.encoding,
-                                   inline_info.GetDepth(encoding.inline_info.encoding) - 1);
+                                   inline_info.GetDepth() - 1);
       }
     }
     if (kIsDebugBuild && do_caller_check) {
diff --git a/runtime/entrypoints/quick/callee_save_frame.h b/runtime/entrypoints/quick/callee_save_frame.h
index ef27ca3..6f1bbaa 100644
--- a/runtime/entrypoints/quick/callee_save_frame.h
+++ b/runtime/entrypoints/quick/callee_save_frame.h
@@ -21,16 +21,17 @@
 #include "base/callee_save_type.h"
 #include "base/enums.h"
 #include "base/mutex.h"
+#include "quick/quick_method_frame_info.h"
 #include "thread-inl.h"
 
 // Specific frame size code is in architecture-specific files. We include this to compile-time
 // specialize the code.
-#include "arch/arm/quick_method_frame_info_arm.h"
-#include "arch/arm64/quick_method_frame_info_arm64.h"
-#include "arch/mips/quick_method_frame_info_mips.h"
-#include "arch/mips64/quick_method_frame_info_mips64.h"
-#include "arch/x86/quick_method_frame_info_x86.h"
-#include "arch/x86_64/quick_method_frame_info_x86_64.h"
+#include "arch/arm/callee_save_frame_arm.h"
+#include "arch/arm64/callee_save_frame_arm64.h"
+#include "arch/mips/callee_save_frame_mips.h"
+#include "arch/mips64/callee_save_frame_mips64.h"
+#include "arch/x86/callee_save_frame_x86.h"
+#include "arch/x86_64/callee_save_frame_x86_64.h"
 
 namespace art {
 class ArtMethod;
@@ -67,57 +68,28 @@
   bool exit_check_;
 };
 
-static constexpr size_t GetCalleeSaveFrameSize(InstructionSet isa, CalleeSaveType type) {
-  switch (isa) {
-    case InstructionSet::kArm:
-    case InstructionSet::kThumb2:
-      return arm::ArmCalleeSaveFrameSize(type);
-    case InstructionSet::kArm64:
-      return arm64::Arm64CalleeSaveFrameSize(type);
-    case InstructionSet::kMips:
-      return mips::MipsCalleeSaveFrameSize(type);
-    case InstructionSet::kMips64:
-      return mips64::Mips64CalleeSaveFrameSize(type);
-    case InstructionSet::kX86:
-      return x86::X86CalleeSaveFrameSize(type);
-    case InstructionSet::kX86_64:
-      return x86_64::X86_64CalleeSaveFrameSize(type);
-    case InstructionSet::kNone:
-      LOG(FATAL) << "kNone has no frame size";
-      UNREACHABLE();
-  }
-  LOG(FATAL) << "Unknown ISA " << isa;
-  UNREACHABLE();
-}
+namespace detail_ {
 
-// Note: this specialized statement is sanity-checked in the quick-trampoline gtest.
-static constexpr PointerSize GetConstExprPointerSize(InstructionSet isa) {
-  switch (isa) {
-    case InstructionSet::kArm:
-    case InstructionSet::kThumb2:
-      return kArmPointerSize;
-    case InstructionSet::kArm64:
-      return kArm64PointerSize;
-    case InstructionSet::kMips:
-      return kMipsPointerSize;
-    case InstructionSet::kMips64:
-      return kMips64PointerSize;
-    case InstructionSet::kX86:
-      return kX86PointerSize;
-    case InstructionSet::kX86_64:
-      return kX86_64PointerSize;
-    case InstructionSet::kNone:
-      LOG(FATAL) << "kNone has no pointer size";
-      UNREACHABLE();
-  }
-  LOG(FATAL) << "Unknown ISA " << isa;
-  UNREACHABLE();
-}
+template <InstructionSet>
+struct CSFSelector;  // No definition for unspecialized callee save frame selector.
 
-// Note: this specialized statement is sanity-checked in the quick-trampoline gtest.
-static constexpr size_t GetCalleeSaveReturnPcOffset(InstructionSet isa, CalleeSaveType type) {
-  return GetCalleeSaveFrameSize(isa, type) - static_cast<size_t>(GetConstExprPointerSize(isa));
-}
+// Note: kThumb2 is never the kRuntimeISA.
+template <>
+struct CSFSelector<InstructionSet::kArm> { using type = arm::ArmCalleeSaveFrame; };
+template <>
+struct CSFSelector<InstructionSet::kArm64> { using type = arm64::Arm64CalleeSaveFrame; };
+template <>
+struct CSFSelector<InstructionSet::kMips> { using type = mips::MipsCalleeSaveFrame; };
+template <>
+struct CSFSelector<InstructionSet::kMips64> { using type = mips64::Mips64CalleeSaveFrame; };
+template <>
+struct CSFSelector<InstructionSet::kX86> { using type = x86::X86CalleeSaveFrame; };
+template <>
+struct CSFSelector<InstructionSet::kX86_64> { using type = x86_64::X86_64CalleeSaveFrame; };
+
+}  // namespace detail_
+
+using RuntimeCalleeSaveFrame = detail_::CSFSelector<kRuntimeISA>::type;
 
 }  // namespace art
 
diff --git a/runtime/entrypoints/quick/quick_trampoline_entrypoints.cc b/runtime/entrypoints/quick/quick_trampoline_entrypoints.cc
index 4ca12fe..0985bf2 100644
--- a/runtime/entrypoints/quick/quick_trampoline_entrypoints.cc
+++ b/runtime/entrypoints/quick/quick_trampoline_entrypoints.cc
@@ -26,6 +26,7 @@
 #include "dex/dex_instruction-inl.h"
 #include "dex/method_reference.h"
 #include "entrypoints/entrypoint_utils-inl.h"
+#include "entrypoints/quick/callee_save_frame.h"
 #include "entrypoints/runtime_asm_entrypoints.h"
 #include "gc/accounting/card_table-inl.h"
 #include "imt_conflict_table.h"
@@ -62,7 +63,16 @@
   static constexpr size_t kBytesStackArgLocation = 4;
   // Frame size in bytes of a callee-save frame for RefsAndArgs.
   static constexpr size_t kQuickCalleeSaveFrame_RefAndArgs_FrameSize =
-      GetCalleeSaveFrameSize(kRuntimeISA, CalleeSaveType::kSaveRefsAndArgs);
+      RuntimeCalleeSaveFrame::GetFrameSize(CalleeSaveType::kSaveRefsAndArgs);
+  // Offset of first GPR arg.
+  static constexpr size_t kQuickCalleeSaveFrame_RefAndArgs_Gpr1Offset =
+      RuntimeCalleeSaveFrame::GetGpr1Offset(CalleeSaveType::kSaveRefsAndArgs);
+  // Offset of first FPR arg.
+  static constexpr size_t kQuickCalleeSaveFrame_RefAndArgs_Fpr1Offset =
+      RuntimeCalleeSaveFrame::GetFpr1Offset(CalleeSaveType::kSaveRefsAndArgs);
+  // Offset of return address.
+  static constexpr size_t kQuickCalleeSaveFrame_RefAndArgs_ReturnPcOffset =
+      RuntimeCalleeSaveFrame::GetReturnPcOffset(CalleeSaveType::kSaveRefsAndArgs);
 #if defined(__arm__)
   // The callee save frame is pointed to by SP.
   // | argN       |  |
@@ -90,12 +100,6 @@
   static constexpr size_t kNumQuickGprArgs = 3;
   static constexpr size_t kNumQuickFprArgs = 16;
   static constexpr bool kGprFprLockstep = false;
-  static constexpr size_t kQuickCalleeSaveFrame_RefAndArgs_Fpr1Offset =
-      arm::ArmCalleeSaveFpr1Offset(CalleeSaveType::kSaveRefsAndArgs);  // Offset of first FPR arg.
-  static constexpr size_t kQuickCalleeSaveFrame_RefAndArgs_Gpr1Offset =
-      arm::ArmCalleeSaveGpr1Offset(CalleeSaveType::kSaveRefsAndArgs);  // Offset of first GPR arg.
-  static constexpr size_t kQuickCalleeSaveFrame_RefAndArgs_LrOffset =
-      arm::ArmCalleeSaveLrOffset(CalleeSaveType::kSaveRefsAndArgs);  // Offset of return address.
   static size_t GprIndexToGprOffset(uint32_t gpr_index) {
     return gpr_index * GetBytesPerGprSpillLocation(kRuntimeISA);
   }
@@ -128,15 +132,6 @@
   static constexpr size_t kNumQuickGprArgs = 7;  // 7 arguments passed in GPRs.
   static constexpr size_t kNumQuickFprArgs = 8;  // 8 arguments passed in FPRs.
   static constexpr bool kGprFprLockstep = false;
-  // Offset of first FPR arg.
-  static constexpr size_t kQuickCalleeSaveFrame_RefAndArgs_Fpr1Offset =
-      arm64::Arm64CalleeSaveFpr1Offset(CalleeSaveType::kSaveRefsAndArgs);
-  // Offset of first GPR arg.
-  static constexpr size_t kQuickCalleeSaveFrame_RefAndArgs_Gpr1Offset =
-      arm64::Arm64CalleeSaveGpr1Offset(CalleeSaveType::kSaveRefsAndArgs);
-  // Offset of return address.
-  static constexpr size_t kQuickCalleeSaveFrame_RefAndArgs_LrOffset =
-      arm64::Arm64CalleeSaveLrOffset(CalleeSaveType::kSaveRefsAndArgs);
   static size_t GprIndexToGprOffset(uint32_t gpr_index) {
     return gpr_index * GetBytesPerGprSpillLocation(kRuntimeISA);
   }
@@ -180,9 +175,6 @@
                                                   // passed only in even numbered registers and each
                                                   // double occupies two registers.
   static constexpr bool kGprFprLockstep = false;
-  static constexpr size_t kQuickCalleeSaveFrame_RefAndArgs_Fpr1Offset = 8;  // Offset of first FPR arg.
-  static constexpr size_t kQuickCalleeSaveFrame_RefAndArgs_Gpr1Offset = 56;  // Offset of first GPR arg.
-  static constexpr size_t kQuickCalleeSaveFrame_RefAndArgs_LrOffset = 108;  // Offset of return address.
   static size_t GprIndexToGprOffset(uint32_t gpr_index) {
     return gpr_index * GetBytesPerGprSpillLocation(kRuntimeISA);
   }
@@ -224,9 +216,6 @@
   static constexpr size_t kNumQuickFprArgs = 7;  // 7 arguments passed in FPRs.
   static constexpr bool kGprFprLockstep = true;
 
-  static constexpr size_t kQuickCalleeSaveFrame_RefAndArgs_Fpr1Offset = 24;  // Offset of first FPR arg (F13).
-  static constexpr size_t kQuickCalleeSaveFrame_RefAndArgs_Gpr1Offset = 80;  // Offset of first GPR arg (A1).
-  static constexpr size_t kQuickCalleeSaveFrame_RefAndArgs_LrOffset = 200;  // Offset of return address.
   static size_t GprIndexToGprOffset(uint32_t gpr_index) {
     return gpr_index * GetBytesPerGprSpillLocation(kRuntimeISA);
   }
@@ -257,9 +246,6 @@
   static constexpr size_t kNumQuickGprArgs = 3;  // 3 arguments passed in GPRs.
   static constexpr size_t kNumQuickFprArgs = 4;  // 4 arguments passed in FPRs.
   static constexpr bool kGprFprLockstep = false;
-  static constexpr size_t kQuickCalleeSaveFrame_RefAndArgs_Fpr1Offset = 4;  // Offset of first FPR arg.
-  static constexpr size_t kQuickCalleeSaveFrame_RefAndArgs_Gpr1Offset = 4 + 4*8;  // Offset of first GPR arg.
-  static constexpr size_t kQuickCalleeSaveFrame_RefAndArgs_LrOffset = 28 + 4*8;  // Offset of return address.
   static size_t GprIndexToGprOffset(uint32_t gpr_index) {
     return gpr_index * GetBytesPerGprSpillLocation(kRuntimeISA);
   }
@@ -299,9 +285,6 @@
   static constexpr size_t kNumQuickGprArgs = 5;  // 5 arguments passed in GPRs.
   static constexpr size_t kNumQuickFprArgs = 8;  // 8 arguments passed in FPRs.
   static constexpr bool kGprFprLockstep = false;
-  static constexpr size_t kQuickCalleeSaveFrame_RefAndArgs_Fpr1Offset = 16;  // Offset of first FPR arg.
-  static constexpr size_t kQuickCalleeSaveFrame_RefAndArgs_Gpr1Offset = 80 + 4*8;  // Offset of first GPR arg.
-  static constexpr size_t kQuickCalleeSaveFrame_RefAndArgs_LrOffset = 168 + 4*8;  // Offset of return address.
   static size_t GprIndexToGprOffset(uint32_t gpr_index) {
     switch (gpr_index) {
       case 0: return (4 * GetBytesPerGprSpillLocation(kRuntimeISA));
@@ -348,8 +331,8 @@
 
   static uint32_t GetCallingDexPc(ArtMethod** sp) REQUIRES_SHARED(Locks::mutator_lock_) {
     DCHECK((*sp)->IsCalleeSaveMethod());
-    const size_t callee_frame_size = GetCalleeSaveFrameSize(kRuntimeISA,
-                                                            CalleeSaveType::kSaveRefsAndArgs);
+    constexpr size_t callee_frame_size =
+        RuntimeCalleeSaveFrame::GetFrameSize(CalleeSaveType::kSaveRefsAndArgs);
     ArtMethod** caller_sp = reinterpret_cast<ArtMethod**>(
         reinterpret_cast<uintptr_t>(sp) + callee_frame_size);
     uintptr_t outer_pc = QuickArgumentVisitor::GetCallingPc(sp);
@@ -357,16 +340,14 @@
     uintptr_t outer_pc_offset = current_code->NativeQuickPcOffset(outer_pc);
 
     if (current_code->IsOptimized()) {
-      CodeInfo code_info = current_code->GetOptimizedCodeInfo();
-      CodeInfoEncoding encoding = code_info.ExtractEncoding();
-      StackMap stack_map = code_info.GetStackMapForNativePcOffset(outer_pc_offset, encoding);
+      CodeInfo code_info(current_code);
+      StackMap stack_map = code_info.GetStackMapForNativePcOffset(outer_pc_offset);
       DCHECK(stack_map.IsValid());
-      if (stack_map.HasInlineInfo(encoding.stack_map.encoding)) {
-        InlineInfo inline_info = code_info.GetInlineInfoOf(stack_map, encoding);
-        return inline_info.GetDexPcAtDepth(encoding.inline_info.encoding,
-                                           inline_info.GetDepth(encoding.inline_info.encoding)-1);
+      if (stack_map.HasInlineInfo()) {
+        InlineInfo inline_info = code_info.GetInlineInfoOf(stack_map);
+        return inline_info.GetDexPcAtDepth(inline_info.GetDepth()-1);
       } else {
-        return stack_map.GetDexPc(encoding.stack_map.encoding);
+        return stack_map.GetDexPc();
       }
     } else {
       return current_code->ToDexPc(*caller_sp, outer_pc);
@@ -376,8 +357,8 @@
   static bool GetInvokeType(ArtMethod** sp, InvokeType* invoke_type, uint32_t* dex_method_index)
       REQUIRES_SHARED(Locks::mutator_lock_) {
     DCHECK((*sp)->IsCalleeSaveMethod());
-    const size_t callee_frame_size = GetCalleeSaveFrameSize(kRuntimeISA,
-                                                            CalleeSaveType::kSaveRefsAndArgs);
+    constexpr size_t callee_frame_size =
+        RuntimeCalleeSaveFrame::GetFrameSize(CalleeSaveType::kSaveRefsAndArgs);
     ArtMethod** caller_sp = reinterpret_cast<ArtMethod**>(
         reinterpret_cast<uintptr_t>(sp) + callee_frame_size);
     uintptr_t outer_pc = QuickArgumentVisitor::GetCallingPc(sp);
@@ -386,13 +367,12 @@
       return false;
     }
     uintptr_t outer_pc_offset = current_code->NativeQuickPcOffset(outer_pc);
-    CodeInfo code_info = current_code->GetOptimizedCodeInfo();
-    CodeInfoEncoding encoding = code_info.ExtractEncoding();
+    CodeInfo code_info(current_code);
     MethodInfo method_info = current_code->GetOptimizedMethodInfo();
-    InvokeInfo invoke(code_info.GetInvokeInfoForNativePcOffset(outer_pc_offset, encoding));
+    InvokeInfo invoke(code_info.GetInvokeInfoForNativePcOffset(outer_pc_offset));
     if (invoke.IsValid()) {
-      *invoke_type = static_cast<InvokeType>(invoke.GetInvokeType(encoding.invoke_info.encoding));
-      *dex_method_index = invoke.GetMethodIndex(encoding.invoke_info.encoding, method_info);
+      *invoke_type = static_cast<InvokeType>(invoke.GetInvokeType());
+      *dex_method_index = invoke.GetMethodIndex(method_info);
       return true;
     }
     return false;
@@ -401,8 +381,9 @@
   // For the given quick ref and args quick frame, return the caller's PC.
   static uintptr_t GetCallingPc(ArtMethod** sp) REQUIRES_SHARED(Locks::mutator_lock_) {
     DCHECK((*sp)->IsCalleeSaveMethod());
-    uint8_t* lr = reinterpret_cast<uint8_t*>(sp) + kQuickCalleeSaveFrame_RefAndArgs_LrOffset;
-    return *reinterpret_cast<uintptr_t*>(lr);
+    uint8_t* return_adress_spill =
+        reinterpret_cast<uint8_t*>(sp) + kQuickCalleeSaveFrame_RefAndArgs_ReturnPcOffset;
+    return *reinterpret_cast<uintptr_t*>(return_adress_spill);
   }
 
   QuickArgumentVisitor(ArtMethod** sp, bool is_static, const char* shorty,
@@ -1160,8 +1141,8 @@
   CHECK(!self->IsExceptionPending()) << "Enter instrumentation exit stub with pending exception "
                                      << self->GetException()->Dump();
   // Compute address of return PC and sanity check that it currently holds 0.
-  size_t return_pc_offset = GetCalleeSaveReturnPcOffset(kRuntimeISA,
-                                                        CalleeSaveType::kSaveEverything);
+  constexpr size_t return_pc_offset =
+      RuntimeCalleeSaveFrame::GetReturnPcOffset(CalleeSaveType::kSaveEverything);
   uintptr_t* return_pc = reinterpret_cast<uintptr_t*>(reinterpret_cast<uint8_t*>(sp) +
                                                       return_pc_offset);
   CHECK_EQ(*return_pc, 0U);
@@ -1213,10 +1194,10 @@
   constexpr CalleeSaveType type = CalleeSaveType::kSaveRefsAndArgs;
   CHECK_EQ(*sp, Runtime::Current()->GetCalleeSaveMethod(type));
 
-  const size_t callee_frame_size = GetCalleeSaveFrameSize(kRuntimeISA, type);
+  constexpr size_t callee_frame_size = RuntimeCalleeSaveFrame::GetFrameSize(type);
   auto** caller_sp = reinterpret_cast<ArtMethod**>(
       reinterpret_cast<uintptr_t>(sp) + callee_frame_size);
-  const size_t callee_return_pc_offset = GetCalleeSaveReturnPcOffset(kRuntimeISA, type);
+  constexpr size_t callee_return_pc_offset = RuntimeCalleeSaveFrame::GetReturnPcOffset(type);
   uintptr_t caller_pc = *reinterpret_cast<uintptr_t*>(
       (reinterpret_cast<uint8_t*>(sp) + callee_return_pc_offset));
   ArtMethod* outer_method = *caller_sp;
@@ -1231,12 +1212,11 @@
   CHECK(current_code != nullptr);
   CHECK(current_code->IsOptimized());
   uintptr_t native_pc_offset = current_code->NativeQuickPcOffset(caller_pc);
-  CodeInfo code_info = current_code->GetOptimizedCodeInfo();
+  CodeInfo code_info(current_code);
   MethodInfo method_info = current_code->GetOptimizedMethodInfo();
-  CodeInfoEncoding encoding = code_info.ExtractEncoding();
-  StackMap stack_map = code_info.GetStackMapForNativePcOffset(native_pc_offset, encoding);
+  StackMap stack_map = code_info.GetStackMapForNativePcOffset(native_pc_offset);
   CHECK(stack_map.IsValid());
-  uint32_t dex_pc = stack_map.GetDexPc(encoding.stack_map.encoding);
+  uint32_t dex_pc = stack_map.GetDexPc();
 
   // Log the outer method and its associated dex file and class table pointer which can be used
   // to find out if the inlined methods were defined by other dex file(s) or class loader(s).
@@ -1250,20 +1230,17 @@
   LOG(FATAL_WITHOUT_ABORT) << "  instruction: " << DumpInstruction(outer_method, dex_pc);
 
   ArtMethod* caller = outer_method;
-  if (stack_map.HasInlineInfo(encoding.stack_map.encoding)) {
-    InlineInfo inline_info = code_info.GetInlineInfoOf(stack_map, encoding);
-    const InlineInfoEncoding& inline_info_encoding = encoding.inline_info.encoding;
-    size_t depth = inline_info.GetDepth(inline_info_encoding);
+  if (stack_map.HasInlineInfo()) {
+    InlineInfo inline_info = code_info.GetInlineInfoOf(stack_map);
+    size_t depth = inline_info.GetDepth();
     for (size_t d = 0; d < depth; ++d) {
       const char* tag = "";
-      dex_pc = inline_info.GetDexPcAtDepth(inline_info_encoding, d);
-      if (inline_info.EncodesArtMethodAtDepth(inline_info_encoding, d)) {
+      dex_pc = inline_info.GetDexPcAtDepth(d);
+      if (inline_info.EncodesArtMethodAtDepth(d)) {
         tag = "encoded ";
-        caller = inline_info.GetArtMethodAtDepth(inline_info_encoding, d);
+        caller = inline_info.GetArtMethodAtDepth(d);
       } else {
-        uint32_t method_index = inline_info.GetMethodIndexAtDepth(inline_info_encoding,
-                                                                  method_info,
-                                                                  d);
+        uint32_t method_index = inline_info.GetMethodIndexAtDepth(method_info, d);
         if (dex_pc == static_cast<uint32_t>(-1)) {
           tag = "special ";
           CHECK_EQ(d + 1u, depth);
diff --git a/runtime/entrypoints/quick/quick_trampoline_entrypoints_test.cc b/runtime/entrypoints/quick/quick_trampoline_entrypoints_test.cc
index 77b3132..89694e3 100644
--- a/runtime/entrypoints/quick/quick_trampoline_entrypoints_test.cc
+++ b/runtime/entrypoints/quick/quick_trampoline_entrypoints_test.cc
@@ -54,15 +54,6 @@
     return save_method;
   }
 
-  static void CheckFrameSize(InstructionSet isa, CalleeSaveType type, uint32_t save_size)
-      NO_THREAD_SAFETY_ANALYSIS {
-    ArtMethod* save_method = CreateCalleeSaveMethod(isa, type);
-    QuickMethodFrameInfo frame_info = Runtime::Current()->GetRuntimeMethodFrameInfo(save_method);
-    EXPECT_EQ(frame_info.FrameSizeInBytes(), save_size) << "Expected and real size differs for "
-        << type << " core spills=" << std::hex << frame_info.CoreSpillMask() << " fp spills="
-        << frame_info.FpSpillMask() << std::dec << " ISA " << isa;
-  }
-
   static void CheckPCOffset(InstructionSet isa, CalleeSaveType type, size_t pc_offset)
       NO_THREAD_SAFETY_ANALYSIS {
     ArtMethod* save_method = CreateCalleeSaveMethod(isa, type);
@@ -74,79 +65,36 @@
   }
 };
 
-// Note: these tests are all runtime tests. They let the Runtime create the corresponding ArtMethod
-// and check against it. Technically we know and expect certain values, but the Runtime code is
-// not constexpr, so we cannot make this compile-time checks (and I want the Runtime code tested).
-
-// This test ensures that kQuickCalleeSaveFrame_RefAndArgs_FrameSize is correct.
-TEST_F(QuickTrampolineEntrypointsTest, FrameSize) {
-  // We have to use a define here as the callee_save_frame.h functions are constexpr.
-#define CHECK_FRAME_SIZE(isa)                                                        \
-  CheckFrameSize(isa,                                                                \
-                 CalleeSaveType::kSaveRefsAndArgs,                                   \
-                 GetCalleeSaveFrameSize(isa, CalleeSaveType::kSaveRefsAndArgs));     \
-  CheckFrameSize(isa,                                                                \
-                 CalleeSaveType::kSaveRefsOnly,                                      \
-                 GetCalleeSaveFrameSize(isa, CalleeSaveType::kSaveRefsOnly));        \
-  CheckFrameSize(isa,                                                                \
-                 CalleeSaveType::kSaveAllCalleeSaves,                                \
-                 GetCalleeSaveFrameSize(isa, CalleeSaveType::kSaveAllCalleeSaves));  \
-  CheckFrameSize(isa,                                                                \
-                 CalleeSaveType::kSaveEverything,                                    \
-                 GetCalleeSaveFrameSize(isa, CalleeSaveType::kSaveEverything));      \
-  CheckFrameSize(isa,                                                                \
-                 CalleeSaveType::kSaveEverythingForClinit,                           \
-                 GetCalleeSaveFrameSize(isa,                                         \
-                                        CalleeSaveType::kSaveEverythingForClinit));  \
-  CheckFrameSize(isa,                                                                \
-                 CalleeSaveType::kSaveEverythingForSuspendCheck,                     \
-                 GetCalleeSaveFrameSize(                                             \
-                     isa, CalleeSaveType::kSaveEverythingForSuspendCheck))
-
-  CHECK_FRAME_SIZE(InstructionSet::kArm);
-  CHECK_FRAME_SIZE(InstructionSet::kArm64);
-  CHECK_FRAME_SIZE(InstructionSet::kMips);
-  CHECK_FRAME_SIZE(InstructionSet::kMips64);
-  CHECK_FRAME_SIZE(InstructionSet::kX86);
-  CHECK_FRAME_SIZE(InstructionSet::kX86_64);
-}
-
-// This test ensures that GetConstExprPointerSize is correct with respect to
-// GetInstructionSetPointerSize.
-TEST_F(QuickTrampolineEntrypointsTest, PointerSize) {
-  EXPECT_EQ(GetInstructionSetPointerSize(InstructionSet::kArm),
-            GetConstExprPointerSize(InstructionSet::kArm));
-  EXPECT_EQ(GetInstructionSetPointerSize(InstructionSet::kArm64),
-            GetConstExprPointerSize(InstructionSet::kArm64));
-  EXPECT_EQ(GetInstructionSetPointerSize(InstructionSet::kMips),
-            GetConstExprPointerSize(InstructionSet::kMips));
-  EXPECT_EQ(GetInstructionSetPointerSize(InstructionSet::kMips64),
-            GetConstExprPointerSize(InstructionSet::kMips64));
-  EXPECT_EQ(GetInstructionSetPointerSize(InstructionSet::kX86),
-            GetConstExprPointerSize(InstructionSet::kX86));
-  EXPECT_EQ(GetInstructionSetPointerSize(InstructionSet::kX86_64),
-            GetConstExprPointerSize(InstructionSet::kX86_64));
-}
-
 // This test ensures that the constexpr specialization of the return PC offset computation in
 // GetCalleeSavePCOffset is correct.
 TEST_F(QuickTrampolineEntrypointsTest, ReturnPC) {
   // Ensure that the computation in callee_save_frame.h correct.
   // Note: we can only check against the kRuntimeISA, because the ArtMethod computation uses
   // sizeof(void*), which is wrong when the target bitwidth is not the same as the host's.
-  CheckPCOffset(kRuntimeISA, CalleeSaveType::kSaveRefsAndArgs,
-                GetCalleeSaveReturnPcOffset(kRuntimeISA, CalleeSaveType::kSaveRefsAndArgs));
-  CheckPCOffset(kRuntimeISA, CalleeSaveType::kSaveRefsOnly,
-                GetCalleeSaveReturnPcOffset(kRuntimeISA, CalleeSaveType::kSaveRefsOnly));
-  CheckPCOffset(kRuntimeISA, CalleeSaveType::kSaveAllCalleeSaves,
-                GetCalleeSaveReturnPcOffset(kRuntimeISA, CalleeSaveType::kSaveAllCalleeSaves));
-  CheckPCOffset(kRuntimeISA, CalleeSaveType::kSaveEverything,
-                GetCalleeSaveReturnPcOffset(kRuntimeISA, CalleeSaveType::kSaveEverything));
-  CheckPCOffset(kRuntimeISA, CalleeSaveType::kSaveEverythingForClinit,
-                GetCalleeSaveReturnPcOffset(kRuntimeISA, CalleeSaveType::kSaveEverythingForClinit));
-  CheckPCOffset(kRuntimeISA, CalleeSaveType::kSaveEverythingForSuspendCheck,
-                GetCalleeSaveReturnPcOffset(kRuntimeISA,
-                                            CalleeSaveType::kSaveEverythingForSuspendCheck));
+  CheckPCOffset(
+      kRuntimeISA,
+      CalleeSaveType::kSaveRefsAndArgs,
+      RuntimeCalleeSaveFrame::GetReturnPcOffset(CalleeSaveType::kSaveRefsAndArgs));
+  CheckPCOffset(
+      kRuntimeISA,
+      CalleeSaveType::kSaveRefsOnly,
+      RuntimeCalleeSaveFrame::GetReturnPcOffset(CalleeSaveType::kSaveRefsOnly));
+  CheckPCOffset(
+      kRuntimeISA,
+      CalleeSaveType::kSaveAllCalleeSaves,
+      RuntimeCalleeSaveFrame::GetReturnPcOffset(CalleeSaveType::kSaveAllCalleeSaves));
+  CheckPCOffset(
+      kRuntimeISA,
+      CalleeSaveType::kSaveEverything,
+      RuntimeCalleeSaveFrame::GetReturnPcOffset(CalleeSaveType::kSaveEverything));
+  CheckPCOffset(
+      kRuntimeISA,
+      CalleeSaveType::kSaveEverythingForClinit,
+      RuntimeCalleeSaveFrame::GetReturnPcOffset(CalleeSaveType::kSaveEverythingForClinit));
+  CheckPCOffset(
+      kRuntimeISA,
+      CalleeSaveType::kSaveEverythingForSuspendCheck,
+      RuntimeCalleeSaveFrame::GetReturnPcOffset(CalleeSaveType::kSaveEverythingForSuspendCheck));
 }
 
 }  // namespace art
diff --git a/runtime/jit/jit.cc b/runtime/jit/jit.cc
index 86e69f4..5d4b9e8 100644
--- a/runtime/jit/jit.cc
+++ b/runtime/jit/jit.cc
@@ -473,11 +473,10 @@
       return false;
     }
 
-    CodeInfo code_info = osr_method->GetOptimizedCodeInfo();
-    CodeInfoEncoding encoding = code_info.ExtractEncoding();
+    CodeInfo code_info(osr_method);
 
     // Find stack map starting at the target dex_pc.
-    StackMap stack_map = code_info.GetOsrStackMapForDexPc(dex_pc + dex_pc_offset, encoding);
+    StackMap stack_map = code_info.GetOsrStackMapForDexPc(dex_pc + dex_pc_offset);
     if (!stack_map.IsValid()) {
       // There is no OSR stack map for this dex pc offset. Just return to the interpreter in the
       // hope that the next branch has one.
@@ -494,7 +493,7 @@
     // We found a stack map, now fill the frame with dex register values from the interpreter's
     // shadow frame.
     DexRegisterMap vreg_map =
-        code_info.GetDexRegisterMapOf(stack_map, encoding, number_of_vregs);
+        code_info.GetDexRegisterMapOf(stack_map, number_of_vregs);
 
     frame_size = osr_method->GetFrameSizeInBytes();
 
@@ -516,7 +515,7 @@
     } else {
       for (uint16_t vreg = 0; vreg < number_of_vregs; ++vreg) {
         DexRegisterLocation::Kind location =
-            vreg_map.GetLocationKind(vreg, number_of_vregs, code_info, encoding);
+            vreg_map.GetLocationKind(vreg, number_of_vregs, code_info);
         if (location == DexRegisterLocation::Kind::kNone) {
           // Dex register is dead or uninitialized.
           continue;
@@ -532,15 +531,14 @@
         int32_t vreg_value = shadow_frame->GetVReg(vreg);
         int32_t slot_offset = vreg_map.GetStackOffsetInBytes(vreg,
                                                              number_of_vregs,
-                                                             code_info,
-                                                             encoding);
+                                                             code_info);
         DCHECK_LT(slot_offset, static_cast<int32_t>(frame_size));
         DCHECK_GT(slot_offset, 0);
         (reinterpret_cast<int32_t*>(memory))[slot_offset / sizeof(int32_t)] = vreg_value;
       }
     }
 
-    native_pc = stack_map.GetNativePcOffset(encoding.stack_map.encoding, kRuntimeISA) +
+    native_pc = stack_map.GetNativePcOffset(kRuntimeISA) +
         osr_method->GetEntryPoint();
     VLOG(jit) << "Jumping to "
               << method_name
diff --git a/runtime/oat.h b/runtime/oat.h
index 6c683f1..7b8f71a 100644
--- a/runtime/oat.h
+++ b/runtime/oat.h
@@ -32,8 +32,8 @@
 class PACKED(4) OatHeader {
  public:
   static constexpr uint8_t kOatMagic[] = { 'o', 'a', 't', '\n' };
-  // Last oat version changed reason: compiler support const-method-handle
-  static constexpr uint8_t kOatVersion[] = { '1', '4', '3', '\0' };
+  // Last oat version changed reason: Refactor stackmap encoding.
+  static constexpr uint8_t kOatVersion[] = { '1', '4', '4', '\0' };
 
   static constexpr const char* kImageLocationKey = "image-location";
   static constexpr const char* kDex2OatCmdLineKey = "dex2oat-cmdline";
diff --git a/runtime/oat_quick_method_header.cc b/runtime/oat_quick_method_header.cc
index 98238e5..aed6bc5 100644
--- a/runtime/oat_quick_method_header.cc
+++ b/runtime/oat_quick_method_header.cc
@@ -19,6 +19,7 @@
 #include "art_method.h"
 #include "dex/dex_file_types.h"
 #include "scoped_thread_state_change-inl.h"
+#include "stack_map.h"
 #include "thread.h"
 
 namespace art {
@@ -42,11 +43,10 @@
   const void* entry_point = GetEntryPoint();
   uint32_t sought_offset = pc - reinterpret_cast<uintptr_t>(entry_point);
   if (IsOptimized()) {
-    CodeInfo code_info = GetOptimizedCodeInfo();
-    CodeInfoEncoding encoding = code_info.ExtractEncoding();
-    StackMap stack_map = code_info.GetStackMapForNativePcOffset(sought_offset, encoding);
+    CodeInfo code_info(this);
+    StackMap stack_map = code_info.GetStackMapForNativePcOffset(sought_offset);
     if (stack_map.IsValid()) {
-      return stack_map.GetDexPc(encoding.stack_map.encoding);
+      return stack_map.GetDexPc();
     }
   } else {
     DCHECK(method->IsNative());
@@ -71,18 +71,17 @@
   DCHECK(!method->IsNative());
   DCHECK(IsOptimized());
   // Search for the dex-to-pc mapping in stack maps.
-  CodeInfo code_info = GetOptimizedCodeInfo();
-  CodeInfoEncoding encoding = code_info.ExtractEncoding();
+  CodeInfo code_info(this);
 
   // All stack maps are stored in the same CodeItem section, safepoint stack
   // maps first, then catch stack maps. We use `is_for_catch_handler` to select
   // the order of iteration.
   StackMap stack_map =
-      LIKELY(is_for_catch_handler) ? code_info.GetCatchStackMapForDexPc(dex_pc, encoding)
-                                   : code_info.GetStackMapForDexPc(dex_pc, encoding);
+      LIKELY(is_for_catch_handler) ? code_info.GetCatchStackMapForDexPc(dex_pc)
+                                   : code_info.GetStackMapForDexPc(dex_pc);
   if (stack_map.IsValid()) {
     return reinterpret_cast<uintptr_t>(entry_point) +
-           stack_map.GetNativePcOffset(encoding.stack_map.encoding, kRuntimeISA);
+           stack_map.GetNativePcOffset(kRuntimeISA);
   }
   if (abort_on_failure) {
     ScopedObjectAccess soa(Thread::Current());
diff --git a/runtime/oat_quick_method_header.h b/runtime/oat_quick_method_header.h
index f0966b7..d6762d6 100644
--- a/runtime/oat_quick_method_header.h
+++ b/runtime/oat_quick_method_header.h
@@ -22,7 +22,6 @@
 #include "base/utils.h"
 #include "method_info.h"
 #include "quick/quick_method_frame_info.h"
-#include "stack_map.h"
 
 namespace art {
 
@@ -75,10 +74,6 @@
     return code_ - vmap_table_offset_;
   }
 
-  CodeInfo GetOptimizedCodeInfo() const {
-    return CodeInfo(GetOptimizedCodeInfoPtr());
-  }
-
   const void* GetOptimizedMethodInfoPtr() const {
     DCHECK(IsOptimized());
     return reinterpret_cast<const void*>(code_ - method_info_offset_);
diff --git a/runtime/quick_exception_handler.cc b/runtime/quick_exception_handler.cc
index ad08fa0..de613d3 100644
--- a/runtime/quick_exception_handler.cc
+++ b/runtime/quick_exception_handler.cc
@@ -225,30 +225,29 @@
 
   CodeItemDataAccessor accessor(handler_method_->DexInstructionData());
   const size_t number_of_vregs = accessor.RegistersSize();
-  CodeInfo code_info = handler_method_header_->GetOptimizedCodeInfo();
-  CodeInfoEncoding encoding = code_info.ExtractEncoding();
+  CodeInfo code_info(handler_method_header_);
 
   // Find stack map of the catch block.
-  StackMap catch_stack_map = code_info.GetCatchStackMapForDexPc(GetHandlerDexPc(), encoding);
+  StackMap catch_stack_map = code_info.GetCatchStackMapForDexPc(GetHandlerDexPc());
   DCHECK(catch_stack_map.IsValid());
   DexRegisterMap catch_vreg_map =
-      code_info.GetDexRegisterMapOf(catch_stack_map, encoding, number_of_vregs);
+      code_info.GetDexRegisterMapOf(catch_stack_map, number_of_vregs);
   if (!catch_vreg_map.IsValid()) {
     return;
   }
 
   // Find stack map of the throwing instruction.
   StackMap throw_stack_map =
-      code_info.GetStackMapForNativePcOffset(stack_visitor->GetNativePcOffset(), encoding);
+      code_info.GetStackMapForNativePcOffset(stack_visitor->GetNativePcOffset());
   DCHECK(throw_stack_map.IsValid());
   DexRegisterMap throw_vreg_map =
-      code_info.GetDexRegisterMapOf(throw_stack_map, encoding, number_of_vregs);
+      code_info.GetDexRegisterMapOf(throw_stack_map, number_of_vregs);
   DCHECK(throw_vreg_map.IsValid());
 
   // Copy values between them.
   for (uint16_t vreg = 0; vreg < number_of_vregs; ++vreg) {
     DexRegisterLocation::Kind catch_location =
-        catch_vreg_map.GetLocationKind(vreg, number_of_vregs, code_info, encoding);
+        catch_vreg_map.GetLocationKind(vreg, number_of_vregs, code_info);
     if (catch_location == DexRegisterLocation::Kind::kNone) {
       continue;
     }
@@ -258,8 +257,7 @@
     uint32_t vreg_value;
     VRegKind vreg_kind = ToVRegKind(throw_vreg_map.GetLocationKind(vreg,
                                                                    number_of_vregs,
-                                                                   code_info,
-                                                                   encoding));
+                                                                   code_info));
     bool get_vreg_success = stack_visitor->GetVReg(stack_visitor->GetMethod(),
                                                    vreg,
                                                    vreg_kind,
@@ -272,8 +270,7 @@
     // Copy value to the catch phi's stack slot.
     int32_t slot_offset = catch_vreg_map.GetStackOffsetInBytes(vreg,
                                                                number_of_vregs,
-                                                               code_info,
-                                                               encoding);
+                                                               code_info);
     ArtMethod** frame_top = stack_visitor->GetCurrentQuickFrame();
     uint8_t* slot_address = reinterpret_cast<uint8_t*>(frame_top) + slot_offset;
     uint32_t* slot_ptr = reinterpret_cast<uint32_t*>(slot_address);
@@ -405,20 +402,18 @@
                                       const bool* updated_vregs)
       REQUIRES_SHARED(Locks::mutator_lock_) {
     const OatQuickMethodHeader* method_header = GetCurrentOatQuickMethodHeader();
-    CodeInfo code_info = method_header->GetOptimizedCodeInfo();
+    CodeInfo code_info(method_header);
     uintptr_t native_pc_offset = method_header->NativeQuickPcOffset(GetCurrentQuickFramePc());
-    CodeInfoEncoding encoding = code_info.ExtractEncoding();
-    StackMap stack_map = code_info.GetStackMapForNativePcOffset(native_pc_offset, encoding);
+    StackMap stack_map = code_info.GetStackMapForNativePcOffset(native_pc_offset);
     CodeItemDataAccessor accessor(m->DexInstructionData());
     const size_t number_of_vregs = accessor.RegistersSize();
-    uint32_t register_mask = code_info.GetRegisterMaskOf(encoding, stack_map);
-    BitMemoryRegion stack_mask = code_info.GetStackMaskOf(encoding, stack_map);
+    uint32_t register_mask = code_info.GetRegisterMaskOf(stack_map);
+    BitMemoryRegion stack_mask = code_info.GetStackMaskOf(stack_map);
     DexRegisterMap vreg_map = IsInInlinedFrame()
         ? code_info.GetDexRegisterMapAtDepth(GetCurrentInliningDepth() - 1,
-                                             code_info.GetInlineInfoOf(stack_map, encoding),
-                                             encoding,
+                                             code_info.GetInlineInfoOf(stack_map),
                                              number_of_vregs)
-        : code_info.GetDexRegisterMapOf(stack_map, encoding, number_of_vregs);
+        : code_info.GetDexRegisterMapOf(stack_map, number_of_vregs);
 
     if (!vreg_map.IsValid()) {
       return;
@@ -431,7 +426,7 @@
       }
 
       DexRegisterLocation::Kind location =
-          vreg_map.GetLocationKind(vreg, number_of_vregs, code_info, encoding);
+          vreg_map.GetLocationKind(vreg, number_of_vregs, code_info);
       static constexpr uint32_t kDeadValue = 0xEBADDE09;
       uint32_t value = kDeadValue;
       bool is_reference = false;
@@ -440,12 +435,11 @@
         case DexRegisterLocation::Kind::kInStack: {
           const int32_t offset = vreg_map.GetStackOffsetInBytes(vreg,
                                                                 number_of_vregs,
-                                                                code_info,
-                                                                encoding);
+                                                                code_info);
           const uint8_t* addr = reinterpret_cast<const uint8_t*>(GetCurrentQuickFrame()) + offset;
           value = *reinterpret_cast<const uint32_t*>(addr);
           uint32_t bit = (offset >> 2);
-          if (bit < encoding.stack_mask.encoding.BitSize() && stack_mask.LoadBit(bit)) {
+          if (bit < code_info.GetNumberOfStackMaskBits() && stack_mask.LoadBit(bit)) {
             is_reference = true;
           }
           break;
@@ -454,7 +448,7 @@
         case DexRegisterLocation::Kind::kInRegisterHigh:
         case DexRegisterLocation::Kind::kInFpuRegister:
         case DexRegisterLocation::Kind::kInFpuRegisterHigh: {
-          uint32_t reg = vreg_map.GetMachineRegister(vreg, number_of_vregs, code_info, encoding);
+          uint32_t reg = vreg_map.GetMachineRegister(vreg, number_of_vregs, code_info);
           bool result = GetRegisterIfAccessible(reg, ToVRegKind(location), &value);
           CHECK(result);
           if (location == DexRegisterLocation::Kind::kInRegister) {
@@ -465,7 +459,7 @@
           break;
         }
         case DexRegisterLocation::Kind::kConstant: {
-          value = vreg_map.GetConstant(vreg, number_of_vregs, code_info, encoding);
+          value = vreg_map.GetConstant(vreg, number_of_vregs, code_info);
           if (value == 0) {
             // Make it a reference for extra safety.
             is_reference = true;
@@ -480,8 +474,7 @@
               << "Unexpected location kind "
               << vreg_map.GetLocationInternalKind(vreg,
                                                   number_of_vregs,
-                                                  code_info,
-                                                  encoding);
+                                                  code_info);
           UNREACHABLE();
         }
       }
diff --git a/runtime/runtime-inl.h b/runtime/runtime-inl.h
index 4584351..374591e 100644
--- a/runtime/runtime-inl.h
+++ b/runtime/runtime-inl.h
@@ -19,8 +19,10 @@
 
 #include "runtime.h"
 
+#include "arch/instruction_set.h"
 #include "art_method.h"
 #include "base/callee_save_type.h"
+#include "entrypoints/quick/callee_save_frame.h"
 #include "gc_root-inl.h"
 #include "obj_ptr-inl.h"
 
@@ -38,21 +40,22 @@
 
 inline QuickMethodFrameInfo Runtime::GetRuntimeMethodFrameInfo(ArtMethod* method) {
   DCHECK(method != nullptr);
+  DCHECK_EQ(instruction_set_, kRuntimeISA);
   // Cannot be imt-conflict-method or resolution-method.
   DCHECK_NE(method, GetImtConflictMethod());
   DCHECK_NE(method, GetResolutionMethod());
   // Don't use GetCalleeSaveMethod(), some tests don't set all callee save methods.
   if (method == GetCalleeSaveMethodUnchecked(CalleeSaveType::kSaveRefsAndArgs)) {
-    return GetCalleeSaveMethodFrameInfo(CalleeSaveType::kSaveRefsAndArgs);
+    return RuntimeCalleeSaveFrame::GetMethodFrameInfo(CalleeSaveType::kSaveRefsAndArgs);
   } else if (method == GetCalleeSaveMethodUnchecked(CalleeSaveType::kSaveAllCalleeSaves)) {
-    return GetCalleeSaveMethodFrameInfo(CalleeSaveType::kSaveAllCalleeSaves);
+    return RuntimeCalleeSaveFrame::GetMethodFrameInfo(CalleeSaveType::kSaveAllCalleeSaves);
   } else if (method == GetCalleeSaveMethodUnchecked(CalleeSaveType::kSaveRefsOnly)) {
-    return GetCalleeSaveMethodFrameInfo(CalleeSaveType::kSaveRefsOnly);
+    return RuntimeCalleeSaveFrame::GetMethodFrameInfo(CalleeSaveType::kSaveRefsOnly);
   } else {
     DCHECK(method == GetCalleeSaveMethodUnchecked(CalleeSaveType::kSaveEverything) ||
            method == GetCalleeSaveMethodUnchecked(CalleeSaveType::kSaveEverythingForClinit) ||
            method == GetCalleeSaveMethodUnchecked(CalleeSaveType::kSaveEverythingForSuspendCheck));
-    return GetCalleeSaveMethodFrameInfo(CalleeSaveType::kSaveEverything);
+    return RuntimeCalleeSaveFrame::GetMethodFrameInfo(CalleeSaveType::kSaveEverything);
   }
 }
 
diff --git a/runtime/runtime.cc b/runtime/runtime.cc
index 4142cb0..1402749 100644
--- a/runtime/runtime.cc
+++ b/runtime/runtime.cc
@@ -39,18 +39,12 @@
 #include "android-base/strings.h"
 
 #include "aot_class_linker.h"
-#include "arch/arm/quick_method_frame_info_arm.h"
 #include "arch/arm/registers_arm.h"
-#include "arch/arm64/quick_method_frame_info_arm64.h"
 #include "arch/arm64/registers_arm64.h"
 #include "arch/instruction_set_features.h"
-#include "arch/mips/quick_method_frame_info_mips.h"
 #include "arch/mips/registers_mips.h"
-#include "arch/mips64/quick_method_frame_info_mips64.h"
 #include "arch/mips64/registers_mips64.h"
-#include "arch/x86/quick_method_frame_info_x86.h"
 #include "arch/x86/registers_x86.h"
-#include "arch/x86_64/quick_method_frame_info_x86_64.h"
 #include "arch/x86_64/registers_x86_64.h"
 #include "art_field-inl.h"
 #include "art_method-inl.h"
@@ -2203,38 +2197,21 @@
 
 void Runtime::SetInstructionSet(InstructionSet instruction_set) {
   instruction_set_ = instruction_set;
-  if ((instruction_set_ == InstructionSet::kThumb2) || (instruction_set_ == InstructionSet::kArm)) {
-    for (int i = 0; i != kCalleeSaveSize; ++i) {
-      CalleeSaveType type = static_cast<CalleeSaveType>(i);
-      callee_save_method_frame_infos_[i] = arm::ArmCalleeSaveMethodFrameInfo(type);
-    }
-  } else if (instruction_set_ == InstructionSet::kMips) {
-    for (int i = 0; i != kCalleeSaveSize; ++i) {
-      CalleeSaveType type = static_cast<CalleeSaveType>(i);
-      callee_save_method_frame_infos_[i] = mips::MipsCalleeSaveMethodFrameInfo(type);
-    }
-  } else if (instruction_set_ == InstructionSet::kMips64) {
-    for (int i = 0; i != kCalleeSaveSize; ++i) {
-      CalleeSaveType type = static_cast<CalleeSaveType>(i);
-      callee_save_method_frame_infos_[i] = mips64::Mips64CalleeSaveMethodFrameInfo(type);
-    }
-  } else if (instruction_set_ == InstructionSet::kX86) {
-    for (int i = 0; i != kCalleeSaveSize; ++i) {
-      CalleeSaveType type = static_cast<CalleeSaveType>(i);
-      callee_save_method_frame_infos_[i] = x86::X86CalleeSaveMethodFrameInfo(type);
-    }
-  } else if (instruction_set_ == InstructionSet::kX86_64) {
-    for (int i = 0; i != kCalleeSaveSize; ++i) {
-      CalleeSaveType type = static_cast<CalleeSaveType>(i);
-      callee_save_method_frame_infos_[i] = x86_64::X86_64CalleeSaveMethodFrameInfo(type);
-    }
-  } else if (instruction_set_ == InstructionSet::kArm64) {
-    for (int i = 0; i != kCalleeSaveSize; ++i) {
-      CalleeSaveType type = static_cast<CalleeSaveType>(i);
-      callee_save_method_frame_infos_[i] = arm64::Arm64CalleeSaveMethodFrameInfo(type);
-    }
-  } else {
-    UNIMPLEMENTED(FATAL) << instruction_set_;
+  switch (instruction_set) {
+    case InstructionSet::kThumb2:
+      // kThumb2 is the same as kArm, use the canonical value.
+      instruction_set_ = InstructionSet::kArm;
+      break;
+    case InstructionSet::kArm:
+    case InstructionSet::kArm64:
+    case InstructionSet::kMips:
+    case InstructionSet::kMips64:
+    case InstructionSet::kX86:
+    case InstructionSet::kX86_64:
+      break;
+    default:
+      UNIMPLEMENTED(FATAL) << instruction_set_;
+      UNREACHABLE();
   }
 }
 
diff --git a/runtime/runtime.h b/runtime/runtime.h
index 953acbb..10f72e7 100644
--- a/runtime/runtime.h
+++ b/runtime/runtime.h
@@ -399,10 +399,6 @@
   ArtMethod* GetCalleeSaveMethodUnchecked(CalleeSaveType type)
       REQUIRES_SHARED(Locks::mutator_lock_);
 
-  QuickMethodFrameInfo GetCalleeSaveMethodFrameInfo(CalleeSaveType type) const {
-    return callee_save_method_frame_infos_[static_cast<size_t>(type)];
-  }
-
   QuickMethodFrameInfo GetRuntimeMethodFrameInfo(ArtMethod* method)
       REQUIRES_SHARED(Locks::mutator_lock_);
 
@@ -831,7 +827,6 @@
   GcRoot<mirror::Object> sentinel_;
 
   InstructionSet instruction_set_;
-  QuickMethodFrameInfo callee_save_method_frame_infos_[kCalleeSaveSize];
 
   CompilerCallbacks* compiler_callbacks_;
   bool is_zygote_;
diff --git a/runtime/stack.cc b/runtime/stack.cc
index 93127be..8cb0700 100644
--- a/runtime/stack.cc
+++ b/runtime/stack.cc
@@ -25,6 +25,7 @@
 #include "base/hex_dump.h"
 #include "dex/dex_file_types.h"
 #include "entrypoints/entrypoint_utils-inl.h"
+#include "entrypoints/quick/callee_save_frame.h"
 #include "entrypoints/runtime_asm_entrypoints.h"
 #include "gc/space/image_space.h"
 #include "gc/space/space-inl.h"
@@ -75,15 +76,14 @@
   }
 }
 
-static InlineInfo GetCurrentInlineInfo(const OatQuickMethodHeader* method_header,
+static InlineInfo GetCurrentInlineInfo(CodeInfo& code_info,
+                                       const OatQuickMethodHeader* method_header,
                                        uintptr_t cur_quick_frame_pc)
     REQUIRES_SHARED(Locks::mutator_lock_) {
   uint32_t native_pc_offset = method_header->NativeQuickPcOffset(cur_quick_frame_pc);
-  CodeInfo code_info = method_header->GetOptimizedCodeInfo();
-  CodeInfoEncoding encoding = code_info.ExtractEncoding();
-  StackMap stack_map = code_info.GetStackMapForNativePcOffset(native_pc_offset, encoding);
+  StackMap stack_map = code_info.GetStackMapForNativePcOffset(native_pc_offset);
   DCHECK(stack_map.IsValid());
-  return code_info.GetInlineInfoOf(stack_map, encoding);
+  return code_info.GetInlineInfoOf(stack_map);
 }
 
 ArtMethod* StackVisitor::GetMethod() const {
@@ -92,16 +92,16 @@
   } else if (cur_quick_frame_ != nullptr) {
     if (IsInInlinedFrame()) {
       size_t depth_in_stack_map = current_inlining_depth_ - 1;
-      InlineInfo inline_info = GetCurrentInlineInfo(GetCurrentOatQuickMethodHeader(),
-                                                    cur_quick_frame_pc_);
       const OatQuickMethodHeader* method_header = GetCurrentOatQuickMethodHeader();
-      CodeInfoEncoding encoding = method_header->GetOptimizedCodeInfo().ExtractEncoding();
+      CodeInfo code_info(method_header);
+      InlineInfo inline_info = GetCurrentInlineInfo(code_info,
+                                                    method_header,
+                                                    cur_quick_frame_pc_);
       MethodInfo method_info = method_header->GetOptimizedMethodInfo();
       DCHECK(walk_kind_ != StackWalkKind::kSkipInlinedFrames);
       return GetResolvedMethod(*GetCurrentQuickFrame(),
                                method_info,
                                inline_info,
-                               encoding.inline_info.encoding,
                                depth_in_stack_map);
     } else {
       return *cur_quick_frame_;
@@ -115,11 +115,11 @@
     return cur_shadow_frame_->GetDexPC();
   } else if (cur_quick_frame_ != nullptr) {
     if (IsInInlinedFrame()) {
-      size_t depth_in_stack_map = current_inlining_depth_ - 1;
       const OatQuickMethodHeader* method_header = GetCurrentOatQuickMethodHeader();
-      CodeInfoEncoding encoding = method_header->GetOptimizedCodeInfo().ExtractEncoding();
-      return GetCurrentInlineInfo(GetCurrentOatQuickMethodHeader(), cur_quick_frame_pc_).
-          GetDexPcAtDepth(encoding.inline_info.encoding, depth_in_stack_map);
+      CodeInfo code_info(method_header);
+      size_t depth_in_stack_map = current_inlining_depth_ - 1;
+      return GetCurrentInlineInfo(code_info, method_header, cur_quick_frame_pc_).
+          GetDexPcAtDepth(depth_in_stack_map);
     } else if (cur_oat_quick_method_header_ == nullptr) {
       return dex::kDexNoIndex;
     } else {
@@ -229,32 +229,29 @@
   uint16_t number_of_dex_registers = accessor.RegistersSize();
   DCHECK_LT(vreg, number_of_dex_registers);
   const OatQuickMethodHeader* method_header = GetCurrentOatQuickMethodHeader();
-  CodeInfo code_info = method_header->GetOptimizedCodeInfo();
-  CodeInfoEncoding encoding = code_info.ExtractEncoding();
+  CodeInfo code_info(method_header);
 
   uint32_t native_pc_offset = method_header->NativeQuickPcOffset(cur_quick_frame_pc_);
-  StackMap stack_map = code_info.GetStackMapForNativePcOffset(native_pc_offset, encoding);
+  StackMap stack_map = code_info.GetStackMapForNativePcOffset(native_pc_offset);
   DCHECK(stack_map.IsValid());
   size_t depth_in_stack_map = current_inlining_depth_ - 1;
 
   DexRegisterMap dex_register_map = IsInInlinedFrame()
       ? code_info.GetDexRegisterMapAtDepth(depth_in_stack_map,
-                                           code_info.GetInlineInfoOf(stack_map, encoding),
-                                           encoding,
+                                           code_info.GetInlineInfoOf(stack_map),
                                            number_of_dex_registers)
-      : code_info.GetDexRegisterMapOf(stack_map, encoding, number_of_dex_registers);
+      : code_info.GetDexRegisterMapOf(stack_map, number_of_dex_registers);
 
   if (!dex_register_map.IsValid()) {
     return false;
   }
   DexRegisterLocation::Kind location_kind =
-      dex_register_map.GetLocationKind(vreg, number_of_dex_registers, code_info, encoding);
+      dex_register_map.GetLocationKind(vreg, number_of_dex_registers, code_info);
   switch (location_kind) {
     case DexRegisterLocation::Kind::kInStack: {
       const int32_t offset = dex_register_map.GetStackOffsetInBytes(vreg,
                                                                     number_of_dex_registers,
-                                                                    code_info,
-                                                                    encoding);
+                                                                    code_info);
       const uint8_t* addr = reinterpret_cast<const uint8_t*>(cur_quick_frame_) + offset;
       *val = *reinterpret_cast<const uint32_t*>(addr);
       return true;
@@ -264,11 +261,11 @@
     case DexRegisterLocation::Kind::kInFpuRegister:
     case DexRegisterLocation::Kind::kInFpuRegisterHigh: {
       uint32_t reg =
-          dex_register_map.GetMachineRegister(vreg, number_of_dex_registers, code_info, encoding);
+          dex_register_map.GetMachineRegister(vreg, number_of_dex_registers, code_info);
       return GetRegisterIfAccessible(reg, kind, val);
     }
     case DexRegisterLocation::Kind::kConstant:
-      *val = dex_register_map.GetConstant(vreg, number_of_dex_registers, code_info, encoding);
+      *val = dex_register_map.GetConstant(vreg, number_of_dex_registers, code_info);
       return true;
     case DexRegisterLocation::Kind::kNone:
       return false;
@@ -277,8 +274,7 @@
           << "Unexpected location kind "
           << dex_register_map.GetLocationInternalKind(vreg,
                                                       number_of_dex_registers,
-                                                      code_info,
-                                                      encoding);
+                                                      code_info);
       UNREACHABLE();
   }
 }
@@ -718,7 +714,7 @@
   Runtime* runtime = Runtime::Current();
 
   if (method->IsAbstract()) {
-    return runtime->GetCalleeSaveMethodFrameInfo(CalleeSaveType::kSaveRefsAndArgs);
+    return RuntimeCalleeSaveFrame::GetMethodFrameInfo(CalleeSaveType::kSaveRefsAndArgs);
   }
 
   // This goes before IsProxyMethod since runtime methods have a null declaring class.
@@ -732,7 +728,7 @@
     // compiled method without any stubs. Therefore the method must have a OatQuickMethodHeader.
     DCHECK(!method->IsDirect() && !method->IsConstructor())
         << "Constructors of proxy classes must have a OatQuickMethodHeader";
-    return runtime->GetCalleeSaveMethodFrameInfo(CalleeSaveType::kSaveRefsAndArgs);
+    return RuntimeCalleeSaveFrame::GetMethodFrameInfo(CalleeSaveType::kSaveRefsAndArgs);
   }
 
   // The only remaining case is if the method is native and uses the generic JNI stub,
@@ -751,8 +747,8 @@
   // Generic JNI frame.
   uint32_t handle_refs = GetNumberOfReferenceArgsWithoutReceiver(method) + 1;
   size_t scope_size = HandleScope::SizeOf(handle_refs);
-  QuickMethodFrameInfo callee_info =
-      runtime->GetCalleeSaveMethodFrameInfo(CalleeSaveType::kSaveRefsAndArgs);
+  constexpr QuickMethodFrameInfo callee_info =
+      RuntimeCalleeSaveFrame::GetMethodFrameInfo(CalleeSaveType::kSaveRefsAndArgs);
 
   // Callee saves + handle scope + method ref + alignment
   // Note: -sizeof(void*) since callee-save frame stores a whole method pointer.
@@ -830,15 +826,14 @@
         if ((walk_kind_ == StackWalkKind::kIncludeInlinedFrames)
             && (cur_oat_quick_method_header_ != nullptr)
             && cur_oat_quick_method_header_->IsOptimized()) {
-          CodeInfo code_info = cur_oat_quick_method_header_->GetOptimizedCodeInfo();
-          CodeInfoEncoding encoding = code_info.ExtractEncoding();
+          CodeInfo code_info(cur_oat_quick_method_header_);
           uint32_t native_pc_offset =
               cur_oat_quick_method_header_->NativeQuickPcOffset(cur_quick_frame_pc_);
-          StackMap stack_map = code_info.GetStackMapForNativePcOffset(native_pc_offset, encoding);
-          if (stack_map.IsValid() && stack_map.HasInlineInfo(encoding.stack_map.encoding)) {
-            InlineInfo inline_info = code_info.GetInlineInfoOf(stack_map, encoding);
+          StackMap stack_map = code_info.GetStackMapForNativePcOffset(native_pc_offset);
+          if (stack_map.IsValid() && stack_map.HasInlineInfo()) {
+            InlineInfo inline_info = code_info.GetInlineInfoOf(stack_map);
             DCHECK_EQ(current_inlining_depth_, 0u);
-            for (current_inlining_depth_ = inline_info.GetDepth(encoding.inline_info.encoding);
+            for (current_inlining_depth_ = inline_info.GetDepth();
                  current_inlining_depth_ != 0;
                  --current_inlining_depth_) {
               bool should_continue = VisitFrame();
diff --git a/runtime/stack_map.cc b/runtime/stack_map.cc
index 9c7b687..2b7e8dd 100644
--- a/runtime/stack_map.cc
+++ b/runtime/stack_map.cc
@@ -25,8 +25,6 @@
 namespace art {
 
 constexpr size_t DexRegisterLocationCatalog::kNoLocationEntryIndex;
-constexpr uint32_t StackMap::kNoDexRegisterMap;
-constexpr uint32_t StackMap::kNoInlineInfo;
 
 std::ostream& operator<<(std::ostream& stream, const DexRegisterLocation::Kind& kind) {
   using Kind = DexRegisterLocation::Kind;
@@ -56,27 +54,25 @@
 DexRegisterLocation::Kind DexRegisterMap::GetLocationInternalKind(
     uint16_t dex_register_number,
     uint16_t number_of_dex_registers,
-    const CodeInfo& code_info,
-    const CodeInfoEncoding& enc) const {
+    const CodeInfo& code_info) const {
   DexRegisterLocationCatalog dex_register_location_catalog =
-      code_info.GetDexRegisterLocationCatalog(enc);
+      code_info.GetDexRegisterLocationCatalog();
   size_t location_catalog_entry_index = GetLocationCatalogEntryIndex(
       dex_register_number,
       number_of_dex_registers,
-      code_info.GetNumberOfLocationCatalogEntries(enc));
+      code_info.GetNumberOfLocationCatalogEntries());
   return dex_register_location_catalog.GetLocationInternalKind(location_catalog_entry_index);
 }
 
 DexRegisterLocation DexRegisterMap::GetDexRegisterLocation(uint16_t dex_register_number,
                                                            uint16_t number_of_dex_registers,
-                                                           const CodeInfo& code_info,
-                                                           const CodeInfoEncoding& enc) const {
+                                                           const CodeInfo& code_info) const {
   DexRegisterLocationCatalog dex_register_location_catalog =
-      code_info.GetDexRegisterLocationCatalog(enc);
+      code_info.GetDexRegisterLocationCatalog();
   size_t location_catalog_entry_index = GetLocationCatalogEntryIndex(
       dex_register_number,
       number_of_dex_registers,
-      code_info.GetNumberOfLocationCatalogEntries(enc));
+      code_info.GetNumberOfLocationCatalogEntries());
   return dex_register_location_catalog.GetDexRegisterLocation(location_catalog_entry_index);
 }
 
@@ -90,27 +86,28 @@
      << " (" << location.GetValue() << ")" << suffix << '\n';
 }
 
-void StackMapEncoding::Dump(VariableIndentationOutputStream* vios) const {
+void StackMap::DumpEncoding(const BitTable<6>& table,
+                            VariableIndentationOutputStream* vios) {
   vios->Stream()
       << "StackMapEncoding"
-      << " (native_pc_bit_offset=" << static_cast<uint32_t>(kNativePcBitOffset)
-      << ", dex_pc_bit_offset=" << static_cast<uint32_t>(dex_pc_bit_offset_)
-      << ", dex_register_map_bit_offset=" << static_cast<uint32_t>(dex_register_map_bit_offset_)
-      << ", inline_info_bit_offset=" << static_cast<uint32_t>(inline_info_bit_offset_)
-      << ", register_mask_bit_offset=" << static_cast<uint32_t>(register_mask_index_bit_offset_)
-      << ", stack_mask_index_bit_offset=" << static_cast<uint32_t>(stack_mask_index_bit_offset_)
-      << ", total_bit_size=" << static_cast<uint32_t>(total_bit_size_)
+      << " (NativePcOffsetBits=" << table.NumColumnBits(kNativePcOffset)
+      << ", DexPcBits=" << table.NumColumnBits(kDexPc)
+      << ", DexRegisterMapOffsetBits=" << table.NumColumnBits(kDexRegisterMapOffset)
+      << ", InlineInfoIndexBits=" << table.NumColumnBits(kInlineInfoIndex)
+      << ", RegisterMaskIndexBits=" << table.NumColumnBits(kRegisterMaskIndex)
+      << ", StackMaskIndexBits=" << table.NumColumnBits(kStackMaskIndex)
       << ")\n";
 }
 
-void InlineInfoEncoding::Dump(VariableIndentationOutputStream* vios) const {
+void InlineInfo::DumpEncoding(const BitTable<5>& table,
+                              VariableIndentationOutputStream* vios) {
   vios->Stream()
       << "InlineInfoEncoding"
-      << " (method_index_bit_offset=" << static_cast<uint32_t>(kMethodIndexBitOffset)
-      << ", dex_pc_bit_offset=" << static_cast<uint32_t>(dex_pc_bit_offset_)
-      << ", extra_data_bit_offset=" << static_cast<uint32_t>(extra_data_bit_offset_)
-      << ", dex_register_map_bit_offset=" << static_cast<uint32_t>(dex_register_map_bit_offset_)
-      << ", total_bit_size=" << static_cast<uint32_t>(total_bit_size_)
+      << " (IsLastBits=" << table.NumColumnBits(kIsLast)
+      << ", MethodIndexIdxBits=" << table.NumColumnBits(kMethodIndexIdx)
+      << ", DexPcBits=" << table.NumColumnBits(kDexPc)
+      << ", ExtraDataBits=" << table.NumColumnBits(kExtraData)
+      << ", DexRegisterMapOffsetBits=" << table.NumColumnBits(kDexRegisterMapOffset)
       << ")\n";
 }
 
@@ -120,26 +117,24 @@
                     bool dump_stack_maps,
                     InstructionSet instruction_set,
                     const MethodInfo& method_info) const {
-  CodeInfoEncoding encoding = ExtractEncoding();
-  size_t number_of_stack_maps = GetNumberOfStackMaps(encoding);
+  size_t number_of_stack_maps = GetNumberOfStackMaps();
   vios->Stream()
       << "Optimized CodeInfo (number_of_dex_registers=" << number_of_dex_registers
       << ", number_of_stack_maps=" << number_of_stack_maps
       << ")\n";
   ScopedIndentation indent1(vios);
-  encoding.stack_map.encoding.Dump(vios);
-  if (HasInlineInfo(encoding)) {
-    encoding.inline_info.encoding.Dump(vios);
+  StackMap::DumpEncoding(stack_maps_, vios);
+  if (HasInlineInfo()) {
+    InlineInfo::DumpEncoding(inline_infos_, vios);
   }
   // Display the Dex register location catalog.
-  GetDexRegisterLocationCatalog(encoding).Dump(vios, *this);
+  GetDexRegisterLocationCatalog().Dump(vios, *this);
   // Display stack maps along with (live) Dex register maps.
   if (dump_stack_maps) {
     for (size_t i = 0; i < number_of_stack_maps; ++i) {
-      StackMap stack_map = GetStackMapAt(i, encoding);
+      StackMap stack_map = GetStackMapAt(i);
       stack_map.Dump(vios,
                      *this,
-                     encoding,
                      method_info,
                      code_offset,
                      number_of_dex_registers,
@@ -153,9 +148,8 @@
 
 void DexRegisterLocationCatalog::Dump(VariableIndentationOutputStream* vios,
                                       const CodeInfo& code_info) {
-  CodeInfoEncoding encoding = code_info.ExtractEncoding();
-  size_t number_of_location_catalog_entries = code_info.GetNumberOfLocationCatalogEntries(encoding);
-  size_t location_catalog_size_in_bytes = code_info.GetDexRegisterLocationCatalogSize(encoding);
+  size_t number_of_location_catalog_entries = code_info.GetNumberOfLocationCatalogEntries();
+  size_t location_catalog_size_in_bytes = code_info.GetDexRegisterLocationCatalogSize();
   vios->Stream()
       << "DexRegisterLocationCatalog (number_of_entries=" << number_of_location_catalog_entries
       << ", size_in_bytes=" << location_catalog_size_in_bytes << ")\n";
@@ -169,8 +163,7 @@
 void DexRegisterMap::Dump(VariableIndentationOutputStream* vios,
                           const CodeInfo& code_info,
                           uint16_t number_of_dex_registers) const {
-  CodeInfoEncoding encoding = code_info.ExtractEncoding();
-  size_t number_of_location_catalog_entries = code_info.GetNumberOfLocationCatalogEntries(encoding);
+  size_t number_of_location_catalog_entries = code_info.GetNumberOfLocationCatalogEntries();
   // TODO: Display the bit mask of live Dex registers.
   for (size_t j = 0; j < number_of_dex_registers; ++j) {
     if (IsDexRegisterLive(j)) {
@@ -178,8 +171,7 @@
           j, number_of_dex_registers, number_of_location_catalog_entries);
       DexRegisterLocation location = GetDexRegisterLocation(j,
                                                             number_of_dex_registers,
-                                                            code_info,
-                                                            encoding);
+                                                            code_info);
       ScopedIndentation indent1(vios);
       DumpRegisterMapping(
           vios->Stream(), j, location, "v",
@@ -190,38 +182,35 @@
 
 void StackMap::Dump(VariableIndentationOutputStream* vios,
                     const CodeInfo& code_info,
-                    const CodeInfoEncoding& encoding,
                     const MethodInfo& method_info,
                     uint32_t code_offset,
                     uint16_t number_of_dex_registers,
                     InstructionSet instruction_set,
                     const std::string& header_suffix) const {
-  StackMapEncoding stack_map_encoding = encoding.stack_map.encoding;
-  const uint32_t pc_offset = GetNativePcOffset(stack_map_encoding, instruction_set);
+  const uint32_t pc_offset = GetNativePcOffset(instruction_set);
   vios->Stream()
       << "StackMap" << header_suffix
       << std::hex
       << " [native_pc=0x" << code_offset + pc_offset << "]"
-      << " [entry_size=0x" << encoding.stack_map.encoding.BitSize() << " bits]"
-      << " (dex_pc=0x" << GetDexPc(stack_map_encoding)
+      << " (dex_pc=0x" << GetDexPc()
       << ", native_pc_offset=0x" << pc_offset
-      << ", dex_register_map_offset=0x" << GetDexRegisterMapOffset(stack_map_encoding)
-      << ", inline_info_offset=0x" << GetInlineInfoIndex(stack_map_encoding)
-      << ", register_mask=0x" << code_info.GetRegisterMaskOf(encoding, *this)
+      << ", dex_register_map_offset=0x" << GetDexRegisterMapOffset()
+      << ", inline_info_offset=0x" << GetInlineInfoIndex()
+      << ", register_mask=0x" << code_info.GetRegisterMaskOf(*this)
       << std::dec
       << ", stack_mask=0b";
-  BitMemoryRegion stack_mask = code_info.GetStackMaskOf(encoding, *this);
-  for (size_t i = 0, e = encoding.stack_mask.encoding.BitSize(); i < e; ++i) {
+  BitMemoryRegion stack_mask = code_info.GetStackMaskOf(*this);
+  for (size_t i = 0, e = code_info.GetNumberOfStackMaskBits(); i < e; ++i) {
     vios->Stream() << stack_mask.LoadBit(e - i - 1);
   }
   vios->Stream() << ")\n";
-  if (HasDexRegisterMap(stack_map_encoding)) {
+  if (HasDexRegisterMap()) {
     DexRegisterMap dex_register_map = code_info.GetDexRegisterMapOf(
-        *this, encoding, number_of_dex_registers);
+        *this, number_of_dex_registers);
     dex_register_map.Dump(vios, code_info, number_of_dex_registers);
   }
-  if (HasInlineInfo(stack_map_encoding)) {
-    InlineInfo inline_info = code_info.GetInlineInfoOf(*this, encoding);
+  if (HasInlineInfo()) {
+    InlineInfo inline_info = code_info.GetInlineInfoOf(*this);
     // We do not know the length of the dex register maps of inlined frames
     // at this level, so we just pass null to `InlineInfo::Dump` to tell
     // it not to look at these maps.
@@ -233,29 +222,27 @@
                       const CodeInfo& code_info,
                       const MethodInfo& method_info,
                       uint16_t number_of_dex_registers[]) const {
-  InlineInfoEncoding inline_info_encoding = code_info.ExtractEncoding().inline_info.encoding;
   vios->Stream() << "InlineInfo with depth "
-                 << static_cast<uint32_t>(GetDepth(inline_info_encoding))
+                 << static_cast<uint32_t>(GetDepth())
                  << "\n";
 
-  for (size_t i = 0; i < GetDepth(inline_info_encoding); ++i) {
+  for (size_t i = 0; i < GetDepth(); ++i) {
     vios->Stream()
         << " At depth " << i
         << std::hex
-        << " (dex_pc=0x" << GetDexPcAtDepth(inline_info_encoding, i);
-    if (EncodesArtMethodAtDepth(inline_info_encoding, i)) {
+        << " (dex_pc=0x" << GetDexPcAtDepth(i);
+    if (EncodesArtMethodAtDepth(i)) {
       ScopedObjectAccess soa(Thread::Current());
-      vios->Stream() << ", method=" << GetArtMethodAtDepth(inline_info_encoding, i)->PrettyMethod();
+      vios->Stream() << ", method=" << GetArtMethodAtDepth(i)->PrettyMethod();
     } else {
       vios->Stream()
           << std::dec
-          << ", method_index=" << GetMethodIndexAtDepth(inline_info_encoding, method_info, i);
+          << ", method_index=" << GetMethodIndexAtDepth(method_info, i);
     }
     vios->Stream() << ")\n";
-    if (HasDexRegisterMapAtDepth(inline_info_encoding, i) && (number_of_dex_registers != nullptr)) {
-      CodeInfoEncoding encoding = code_info.ExtractEncoding();
+    if (HasDexRegisterMapAtDepth(i) && (number_of_dex_registers != nullptr)) {
       DexRegisterMap dex_register_map =
-          code_info.GetDexRegisterMapAtDepth(i, *this, encoding, number_of_dex_registers[i]);
+          code_info.GetDexRegisterMapAtDepth(i, *this, number_of_dex_registers[i]);
       ScopedIndentation indent1(vios);
       dex_register_map.Dump(vios, code_info, number_of_dex_registers[i]);
     }
diff --git a/runtime/stack_map.h b/runtime/stack_map.h
index fb18674..91cecf0 100644
--- a/runtime/stack_map.h
+++ b/runtime/stack_map.h
@@ -21,12 +21,14 @@
 
 #include "arch/code_offset.h"
 #include "base/bit_memory_region.h"
+#include "base/bit_table.h"
 #include "base/bit_utils.h"
 #include "base/bit_vector.h"
 #include "base/leb128.h"
 #include "base/memory_region.h"
 #include "dex/dex_file_types.h"
 #include "method_info.h"
+#include "oat_quick_method_header.h"
 
 namespace art {
 
@@ -39,8 +41,6 @@
 
 class ArtMethod;
 class CodeInfo;
-class StackMapEncoding;
-struct CodeInfoEncoding;
 
 /**
  * Classes in the following file are wrapper on stack map information backed
@@ -454,30 +454,26 @@
   // Get the surface kind of Dex register `dex_register_number`.
   DexRegisterLocation::Kind GetLocationKind(uint16_t dex_register_number,
                                             uint16_t number_of_dex_registers,
-                                            const CodeInfo& code_info,
-                                            const CodeInfoEncoding& enc) const {
+                                            const CodeInfo& code_info) const {
     return DexRegisterLocation::ConvertToSurfaceKind(
-        GetLocationInternalKind(dex_register_number, number_of_dex_registers, code_info, enc));
+        GetLocationInternalKind(dex_register_number, number_of_dex_registers, code_info));
   }
 
   // Get the internal kind of Dex register `dex_register_number`.
   DexRegisterLocation::Kind GetLocationInternalKind(uint16_t dex_register_number,
                                                     uint16_t number_of_dex_registers,
-                                                    const CodeInfo& code_info,
-                                                    const CodeInfoEncoding& enc) const;
+                                                    const CodeInfo& code_info) const;
 
   // Get the Dex register location `dex_register_number`.
   DexRegisterLocation GetDexRegisterLocation(uint16_t dex_register_number,
                                              uint16_t number_of_dex_registers,
-                                             const CodeInfo& code_info,
-                                             const CodeInfoEncoding& enc) const;
+                                             const CodeInfo& code_info) const;
 
   int32_t GetStackOffsetInBytes(uint16_t dex_register_number,
                                 uint16_t number_of_dex_registers,
-                                const CodeInfo& code_info,
-                                const CodeInfoEncoding& enc) const {
+                                const CodeInfo& code_info) const {
     DexRegisterLocation location =
-        GetDexRegisterLocation(dex_register_number, number_of_dex_registers, code_info, enc);
+        GetDexRegisterLocation(dex_register_number, number_of_dex_registers, code_info);
     DCHECK(location.GetKind() == DexRegisterLocation::Kind::kInStack);
     // GetDexRegisterLocation returns the offset in bytes.
     return location.GetValue();
@@ -485,20 +481,18 @@
 
   int32_t GetConstant(uint16_t dex_register_number,
                       uint16_t number_of_dex_registers,
-                      const CodeInfo& code_info,
-                      const CodeInfoEncoding& enc) const {
+                      const CodeInfo& code_info) const {
     DexRegisterLocation location =
-        GetDexRegisterLocation(dex_register_number, number_of_dex_registers, code_info, enc);
+        GetDexRegisterLocation(dex_register_number, number_of_dex_registers, code_info);
     DCHECK_EQ(location.GetKind(), DexRegisterLocation::Kind::kConstant);
     return location.GetValue();
   }
 
   int32_t GetMachineRegister(uint16_t dex_register_number,
                              uint16_t number_of_dex_registers,
-                             const CodeInfo& code_info,
-                             const CodeInfoEncoding& enc) const {
+                             const CodeInfo& code_info) const {
     DexRegisterLocation location =
-        GetDexRegisterLocation(dex_register_number, number_of_dex_registers, code_info, enc);
+        GetDexRegisterLocation(dex_register_number, number_of_dex_registers, code_info);
     DCHECK(location.GetInternalKind() == DexRegisterLocation::Kind::kInRegister ||
            location.GetInternalKind() == DexRegisterLocation::Kind::kInRegisterHigh ||
            location.GetInternalKind() == DexRegisterLocation::Kind::kInFpuRegister ||
@@ -653,137 +647,6 @@
   friend class StackMapStream;
 };
 
-// Represents bit range of bit-packed integer field.
-// We reuse the idea from ULEB128p1 to support encoding of -1 (aka 0xFFFFFFFF).
-// If min_value is set to -1, we implicitly subtract one from any loaded value,
-// and add one to any stored value. This is generalized to any negative values.
-// In other words, min_value acts as a base and the stored value is added to it.
-struct FieldEncoding {
-  FieldEncoding(size_t start_offset, size_t end_offset, int32_t min_value = 0)
-      : start_offset_(start_offset), end_offset_(end_offset), min_value_(min_value) {
-    DCHECK_LE(start_offset_, end_offset_);
-    DCHECK_LE(BitSize(), 32u);
-  }
-
-  ALWAYS_INLINE size_t BitSize() const { return end_offset_ - start_offset_; }
-
-  template <typename Region>
-  ALWAYS_INLINE int32_t Load(const Region& region) const {
-    DCHECK_LE(end_offset_, region.size_in_bits());
-    return static_cast<int32_t>(region.LoadBits(start_offset_, BitSize())) + min_value_;
-  }
-
-  template <typename Region>
-  ALWAYS_INLINE void Store(Region region, int32_t value) const {
-    region.StoreBits(start_offset_, static_cast<uint32_t>(value - min_value_), BitSize());
-    DCHECK_EQ(Load(region), value);
-  }
-
- private:
-  size_t start_offset_;
-  size_t end_offset_;
-  int32_t min_value_;
-};
-
-class StackMapEncoding {
- public:
-  StackMapEncoding()
-      : dex_pc_bit_offset_(0),
-        dex_register_map_bit_offset_(0),
-        inline_info_bit_offset_(0),
-        register_mask_index_bit_offset_(0),
-        stack_mask_index_bit_offset_(0),
-        total_bit_size_(0) {}
-
-  // Set stack map bit layout based on given sizes.
-  // Returns the size of stack map in bits.
-  size_t SetFromSizes(size_t native_pc_max,
-                      size_t dex_pc_max,
-                      size_t dex_register_map_size,
-                      size_t number_of_inline_info,
-                      size_t number_of_register_masks,
-                      size_t number_of_stack_masks) {
-    total_bit_size_ = 0;
-    DCHECK_EQ(kNativePcBitOffset, total_bit_size_);
-    total_bit_size_ += MinimumBitsToStore(native_pc_max);
-
-    dex_pc_bit_offset_ = total_bit_size_;
-    // Note: We're not encoding the dex pc if there is none. That's the case
-    // for an intrinsified native method, such as String.charAt().
-    if (dex_pc_max != dex::kDexNoIndex) {
-      total_bit_size_ += MinimumBitsToStore(1 /* kNoDexPc */ + dex_pc_max);
-    }
-
-    // We also need +1 for kNoDexRegisterMap, but since the size is strictly
-    // greater than any offset we might try to encode, we already implicitly have it.
-    dex_register_map_bit_offset_ = total_bit_size_;
-    total_bit_size_ += MinimumBitsToStore(dex_register_map_size);
-
-    // We also need +1 for kNoInlineInfo, but since the inline_info_size is strictly
-    // greater than the offset we might try to encode, we already implicitly have it.
-    // If inline_info_size is zero, we can encode only kNoInlineInfo (in zero bits).
-    inline_info_bit_offset_ = total_bit_size_;
-    total_bit_size_ += MinimumBitsToStore(number_of_inline_info);
-
-    register_mask_index_bit_offset_ = total_bit_size_;
-    total_bit_size_ += MinimumBitsToStore(number_of_register_masks);
-
-    stack_mask_index_bit_offset_ = total_bit_size_;
-    total_bit_size_ += MinimumBitsToStore(number_of_stack_masks);
-
-    return total_bit_size_;
-  }
-
-  ALWAYS_INLINE FieldEncoding GetNativePcEncoding() const {
-    return FieldEncoding(kNativePcBitOffset, dex_pc_bit_offset_);
-  }
-  ALWAYS_INLINE FieldEncoding GetDexPcEncoding() const {
-    return FieldEncoding(dex_pc_bit_offset_, dex_register_map_bit_offset_, -1 /* min_value */);
-  }
-  ALWAYS_INLINE FieldEncoding GetDexRegisterMapEncoding() const {
-    return FieldEncoding(dex_register_map_bit_offset_, inline_info_bit_offset_, -1 /* min_value */);
-  }
-  ALWAYS_INLINE FieldEncoding GetInlineInfoEncoding() const {
-    return FieldEncoding(inline_info_bit_offset_,
-                         register_mask_index_bit_offset_,
-                         -1 /* min_value */);
-  }
-  ALWAYS_INLINE FieldEncoding GetRegisterMaskIndexEncoding() const {
-    return FieldEncoding(register_mask_index_bit_offset_, stack_mask_index_bit_offset_);
-  }
-  ALWAYS_INLINE FieldEncoding GetStackMaskIndexEncoding() const {
-    return FieldEncoding(stack_mask_index_bit_offset_, total_bit_size_);
-  }
-  ALWAYS_INLINE size_t BitSize() const {
-    return total_bit_size_;
-  }
-
-  // Encode the encoding into the vector.
-  template<typename Vector>
-  void Encode(Vector* dest) const {
-    static_assert(alignof(StackMapEncoding) == 1, "Should not require alignment");
-    const uint8_t* ptr = reinterpret_cast<const uint8_t*>(this);
-    dest->insert(dest->end(), ptr, ptr + sizeof(*this));
-  }
-
-  // Decode the encoding from a pointer, updates the pointer.
-  void Decode(const uint8_t** ptr) {
-    *this = *reinterpret_cast<const StackMapEncoding*>(*ptr);
-    *ptr += sizeof(*this);
-  }
-
-  void Dump(VariableIndentationOutputStream* vios) const;
-
- private:
-  static constexpr size_t kNativePcBitOffset = 0;
-  uint8_t dex_pc_bit_offset_;
-  uint8_t dex_register_map_bit_offset_;
-  uint8_t inline_info_bit_offset_;
-  uint8_t register_mask_index_bit_offset_;
-  uint8_t stack_mask_index_bit_offset_;
-  uint8_t total_bit_size_;
-};
-
 /**
  * A Stack Map holds compilation information for a specific PC necessary for:
  * - Mapping it to a dex PC,
@@ -791,246 +654,101 @@
  * - Knowing which registers hold objects,
  * - Knowing the inlining information,
  * - Knowing the values of dex registers.
- *
- * The information is of the form:
- *
- *   [native_pc_offset, dex_pc, dex_register_map_offset, inlining_info_index, register_mask_index,
- *   stack_mask_index].
  */
-class StackMap {
+class StackMap : public BitTable<6>::Accessor {
  public:
-  StackMap() {}
-  explicit StackMap(BitMemoryRegion region) : region_(region) {}
+  enum Field {
+    kNativePcOffset,
+    kDexPc,
+    kDexRegisterMapOffset,
+    kInlineInfoIndex,
+    kRegisterMaskIndex,
+    kStackMaskIndex,
+    kCount,
+  };
 
-  ALWAYS_INLINE bool IsValid() const { return region_.IsValid(); }
+  StackMap() : BitTable<kCount>::Accessor(nullptr, -1) {}
+  StackMap(const BitTable<kCount>* table, uint32_t row)
+    : BitTable<kCount>::Accessor(table, row) {}
 
-  ALWAYS_INLINE uint32_t GetDexPc(const StackMapEncoding& encoding) const {
-    return encoding.GetDexPcEncoding().Load(region_);
-  }
-
-  ALWAYS_INLINE void SetDexPc(const StackMapEncoding& encoding, uint32_t dex_pc) {
-    encoding.GetDexPcEncoding().Store(region_, dex_pc);
-  }
-
-  ALWAYS_INLINE uint32_t GetNativePcOffset(const StackMapEncoding& encoding,
-                                           InstructionSet instruction_set) const {
-    CodeOffset offset(
-        CodeOffset::FromCompressedOffset(encoding.GetNativePcEncoding().Load(region_)));
+  ALWAYS_INLINE uint32_t GetNativePcOffset(InstructionSet instruction_set) const {
+    CodeOffset offset(CodeOffset::FromCompressedOffset(Get<kNativePcOffset>()));
     return offset.Uint32Value(instruction_set);
   }
 
-  ALWAYS_INLINE void SetNativePcCodeOffset(const StackMapEncoding& encoding,
-                                           CodeOffset native_pc_offset) {
-    encoding.GetNativePcEncoding().Store(region_, native_pc_offset.CompressedValue());
-  }
+  uint32_t GetDexPc() const { return Get<kDexPc>(); }
 
-  ALWAYS_INLINE uint32_t GetDexRegisterMapOffset(const StackMapEncoding& encoding) const {
-    return encoding.GetDexRegisterMapEncoding().Load(region_);
-  }
+  uint32_t GetDexRegisterMapOffset() const { return Get<kDexRegisterMapOffset>(); }
+  bool HasDexRegisterMap() const { return GetDexRegisterMapOffset() != kNoValue; }
 
-  ALWAYS_INLINE void SetDexRegisterMapOffset(const StackMapEncoding& encoding, uint32_t offset) {
-    encoding.GetDexRegisterMapEncoding().Store(region_, offset);
-  }
+  uint32_t GetInlineInfoIndex() const { return Get<kInlineInfoIndex>(); }
+  bool HasInlineInfo() const { return GetInlineInfoIndex() != kNoValue; }
 
-  ALWAYS_INLINE uint32_t GetInlineInfoIndex(const StackMapEncoding& encoding) const {
-    return encoding.GetInlineInfoEncoding().Load(region_);
-  }
+  uint32_t GetRegisterMaskIndex() const { return Get<kRegisterMaskIndex>(); }
 
-  ALWAYS_INLINE void SetInlineInfoIndex(const StackMapEncoding& encoding, uint32_t index) {
-    encoding.GetInlineInfoEncoding().Store(region_, index);
-  }
+  uint32_t GetStackMaskIndex() const { return Get<kStackMaskIndex>(); }
 
-  ALWAYS_INLINE uint32_t GetRegisterMaskIndex(const StackMapEncoding& encoding) const {
-    return encoding.GetRegisterMaskIndexEncoding().Load(region_);
-  }
-
-  ALWAYS_INLINE void SetRegisterMaskIndex(const StackMapEncoding& encoding, uint32_t mask) {
-    encoding.GetRegisterMaskIndexEncoding().Store(region_, mask);
-  }
-
-  ALWAYS_INLINE uint32_t GetStackMaskIndex(const StackMapEncoding& encoding) const {
-    return encoding.GetStackMaskIndexEncoding().Load(region_);
-  }
-
-  ALWAYS_INLINE void SetStackMaskIndex(const StackMapEncoding& encoding, uint32_t mask) {
-    encoding.GetStackMaskIndexEncoding().Store(region_, mask);
-  }
-
-  ALWAYS_INLINE bool HasDexRegisterMap(const StackMapEncoding& encoding) const {
-    return GetDexRegisterMapOffset(encoding) != kNoDexRegisterMap;
-  }
-
-  ALWAYS_INLINE bool HasInlineInfo(const StackMapEncoding& encoding) const {
-    return GetInlineInfoIndex(encoding) != kNoInlineInfo;
-  }
-
-  ALWAYS_INLINE bool Equals(const StackMap& other) const {
-    return region_.Equals(other.region_);
-  }
-
+  static void DumpEncoding(const BitTable<6>& table, VariableIndentationOutputStream* vios);
   void Dump(VariableIndentationOutputStream* vios,
             const CodeInfo& code_info,
-            const CodeInfoEncoding& encoding,
             const MethodInfo& method_info,
             uint32_t code_offset,
             uint16_t number_of_dex_registers,
             InstructionSet instruction_set,
             const std::string& header_suffix = "") const;
-
-  // Special (invalid) offset for the DexRegisterMapOffset field meaning
-  // that there is no Dex register map for this stack map.
-  static constexpr uint32_t kNoDexRegisterMap = -1;
-
-  // Special (invalid) offset for the InlineDescriptorOffset field meaning
-  // that there is no inline info for this stack map.
-  static constexpr uint32_t kNoInlineInfo = -1;
-
- private:
-  static constexpr int kFixedSize = 0;
-
-  BitMemoryRegion region_;
-
-  friend class StackMapStream;
-};
-
-class InlineInfoEncoding {
- public:
-  void SetFromSizes(size_t method_index_idx_max,
-                    size_t dex_pc_max,
-                    size_t extra_data_max,
-                    size_t dex_register_map_size) {
-    total_bit_size_ = kMethodIndexBitOffset;
-    total_bit_size_ += MinimumBitsToStore(method_index_idx_max);
-
-    dex_pc_bit_offset_ = dchecked_integral_cast<uint8_t>(total_bit_size_);
-    // Note: We're not encoding the dex pc if there is none. That's the case
-    // for an intrinsified native method, such as String.charAt().
-    if (dex_pc_max != dex::kDexNoIndex) {
-      total_bit_size_ += MinimumBitsToStore(1 /* kNoDexPc */ + dex_pc_max);
-    }
-
-    extra_data_bit_offset_ = dchecked_integral_cast<uint8_t>(total_bit_size_);
-    total_bit_size_ += MinimumBitsToStore(extra_data_max);
-
-    // We also need +1 for kNoDexRegisterMap, but since the size is strictly
-    // greater than any offset we might try to encode, we already implicitly have it.
-    dex_register_map_bit_offset_ = dchecked_integral_cast<uint8_t>(total_bit_size_);
-    total_bit_size_ += MinimumBitsToStore(dex_register_map_size);
-  }
-
-  ALWAYS_INLINE FieldEncoding GetMethodIndexIdxEncoding() const {
-    return FieldEncoding(kMethodIndexBitOffset, dex_pc_bit_offset_);
-  }
-  ALWAYS_INLINE FieldEncoding GetDexPcEncoding() const {
-    return FieldEncoding(dex_pc_bit_offset_, extra_data_bit_offset_, -1 /* min_value */);
-  }
-  ALWAYS_INLINE FieldEncoding GetExtraDataEncoding() const {
-    return FieldEncoding(extra_data_bit_offset_, dex_register_map_bit_offset_);
-  }
-  ALWAYS_INLINE FieldEncoding GetDexRegisterMapEncoding() const {
-    return FieldEncoding(dex_register_map_bit_offset_, total_bit_size_, -1 /* min_value */);
-  }
-  ALWAYS_INLINE size_t BitSize() const {
-    return total_bit_size_;
-  }
-
-  void Dump(VariableIndentationOutputStream* vios) const;
-
-  // Encode the encoding into the vector.
-  template<typename Vector>
-  void Encode(Vector* dest) const {
-    static_assert(alignof(InlineInfoEncoding) == 1, "Should not require alignment");
-    const uint8_t* ptr = reinterpret_cast<const uint8_t*>(this);
-    dest->insert(dest->end(), ptr, ptr + sizeof(*this));
-  }
-
-  // Decode the encoding from a pointer, updates the pointer.
-  void Decode(const uint8_t** ptr) {
-    *this = *reinterpret_cast<const InlineInfoEncoding*>(*ptr);
-    *ptr += sizeof(*this);
-  }
-
- private:
-  static constexpr uint8_t kIsLastBitOffset = 0;
-  static constexpr uint8_t kMethodIndexBitOffset = 1;
-  uint8_t dex_pc_bit_offset_;
-  uint8_t extra_data_bit_offset_;
-  uint8_t dex_register_map_bit_offset_;
-  uint8_t total_bit_size_;
 };
 
 /**
- * Inline information for a specific PC. The information is of the form:
- *
- *   [is_last,
- *    method_index (or ArtMethod high bits),
- *    dex_pc,
- *    extra_data (ArtMethod low bits or 1),
- *    dex_register_map_offset]+.
+ * Inline information for a specific PC.
+ * The row referenced from the StackMap holds information at depth 0.
+ * Following rows hold information for further depths.
  */
-class InlineInfo {
+class InlineInfo : public BitTable<5>::Accessor {
  public:
-  explicit InlineInfo(BitMemoryRegion region) : region_(region) {}
+  enum Field {
+    kIsLast,  // Determines if there are further rows for further depths.
+    kMethodIndexIdx,  // Method index or ArtMethod high bits.
+    kDexPc,
+    kExtraData,  // ArtMethod low bits or 1.
+    kDexRegisterMapOffset,
+    kCount,
+  };
+  static constexpr uint32_t kLast = -1;
+  static constexpr uint32_t kMore = 0;
 
-  ALWAYS_INLINE uint32_t GetDepth(const InlineInfoEncoding& encoding) const {
+  InlineInfo(const BitTable<kCount>* table, uint32_t row)
+    : BitTable<kCount>::Accessor(table, row) {}
+
+  ALWAYS_INLINE InlineInfo AtDepth(uint32_t depth) const {
+    return InlineInfo(table_, this->row_ + depth);
+  }
+
+  uint32_t GetDepth() const {
     size_t depth = 0;
-    while (!GetRegionAtDepth(encoding, depth++).LoadBit(0)) { }  // Check is_last bit.
+    while (AtDepth(depth++).Get<kIsLast>() == kMore) { }
     return depth;
   }
 
-  ALWAYS_INLINE void SetDepth(const InlineInfoEncoding& encoding, uint32_t depth) {
-    DCHECK_GT(depth, 0u);
-    for (size_t d = 0; d < depth; ++d) {
-      GetRegionAtDepth(encoding, d).StoreBit(0, d == depth - 1);  // Set is_last bit.
-    }
+  uint32_t GetMethodIndexIdxAtDepth(uint32_t depth) const {
+    DCHECK(!EncodesArtMethodAtDepth(depth));
+    return AtDepth(depth).Get<kMethodIndexIdx>();
   }
 
-  ALWAYS_INLINE uint32_t GetMethodIndexIdxAtDepth(const InlineInfoEncoding& encoding,
-                                                  uint32_t depth) const {
-    DCHECK(!EncodesArtMethodAtDepth(encoding, depth));
-    return encoding.GetMethodIndexIdxEncoding().Load(GetRegionAtDepth(encoding, depth));
+  uint32_t GetMethodIndexAtDepth(const MethodInfo& method_info, uint32_t depth) const {
+    return method_info.GetMethodIndex(GetMethodIndexIdxAtDepth(depth));
   }
 
-  ALWAYS_INLINE void SetMethodIndexIdxAtDepth(const InlineInfoEncoding& encoding,
-                                              uint32_t depth,
-                                              uint32_t index) {
-    encoding.GetMethodIndexIdxEncoding().Store(GetRegionAtDepth(encoding, depth), index);
+  uint32_t GetDexPcAtDepth(uint32_t depth) const {
+    return AtDepth(depth).Get<kDexPc>();
   }
 
-
-  ALWAYS_INLINE uint32_t GetMethodIndexAtDepth(const InlineInfoEncoding& encoding,
-                                               const MethodInfo& method_info,
-                                               uint32_t depth) const {
-    return method_info.GetMethodIndex(GetMethodIndexIdxAtDepth(encoding, depth));
+  bool EncodesArtMethodAtDepth(uint32_t depth) const {
+    return (AtDepth(depth).Get<kExtraData>() & 1) == 0;
   }
 
-  ALWAYS_INLINE uint32_t GetDexPcAtDepth(const InlineInfoEncoding& encoding,
-                                         uint32_t depth) const {
-    return encoding.GetDexPcEncoding().Load(GetRegionAtDepth(encoding, depth));
-  }
-
-  ALWAYS_INLINE void SetDexPcAtDepth(const InlineInfoEncoding& encoding,
-                                     uint32_t depth,
-                                     uint32_t dex_pc) {
-    encoding.GetDexPcEncoding().Store(GetRegionAtDepth(encoding, depth), dex_pc);
-  }
-
-  ALWAYS_INLINE bool EncodesArtMethodAtDepth(const InlineInfoEncoding& encoding,
-                                             uint32_t depth) const {
-    return (encoding.GetExtraDataEncoding().Load(GetRegionAtDepth(encoding, depth)) & 1) == 0;
-  }
-
-  ALWAYS_INLINE void SetExtraDataAtDepth(const InlineInfoEncoding& encoding,
-                                         uint32_t depth,
-                                         uint32_t extra_data) {
-    encoding.GetExtraDataEncoding().Store(GetRegionAtDepth(encoding, depth), extra_data);
-  }
-
-  ALWAYS_INLINE ArtMethod* GetArtMethodAtDepth(const InlineInfoEncoding& encoding,
-                                               uint32_t depth) const {
-    uint32_t low_bits = encoding.GetExtraDataEncoding().Load(GetRegionAtDepth(encoding, depth));
-    uint32_t high_bits = encoding.GetMethodIndexIdxEncoding().Load(
-        GetRegionAtDepth(encoding, depth));
+  ArtMethod* GetArtMethodAtDepth(uint32_t depth) const {
+    uint32_t low_bits = AtDepth(depth).Get<kExtraData>();
+    uint32_t high_bits = AtDepth(depth).Get<kMethodIndexIdx>();
     if (high_bits == 0) {
       return reinterpret_cast<ArtMethod*>(low_bits);
     } else {
@@ -1040,411 +758,132 @@
     }
   }
 
-  ALWAYS_INLINE uint32_t GetDexRegisterMapOffsetAtDepth(const InlineInfoEncoding& encoding,
-                                                        uint32_t depth) const {
-    return encoding.GetDexRegisterMapEncoding().Load(GetRegionAtDepth(encoding, depth));
+  uint32_t GetDexRegisterMapOffsetAtDepth(uint32_t depth) const {
+    return AtDepth(depth).Get<kDexRegisterMapOffset>();
   }
 
-  ALWAYS_INLINE void SetDexRegisterMapOffsetAtDepth(const InlineInfoEncoding& encoding,
-                                                    uint32_t depth,
-                                                    uint32_t offset) {
-    encoding.GetDexRegisterMapEncoding().Store(GetRegionAtDepth(encoding, depth), offset);
+  bool HasDexRegisterMapAtDepth(uint32_t depth) const {
+    return GetDexRegisterMapOffsetAtDepth(depth) != StackMap::kNoValue;
   }
 
-  ALWAYS_INLINE bool HasDexRegisterMapAtDepth(const InlineInfoEncoding& encoding,
-                                              uint32_t depth) const {
-    return GetDexRegisterMapOffsetAtDepth(encoding, depth) != StackMap::kNoDexRegisterMap;
-  }
-
+  static void DumpEncoding(const BitTable<5>& table, VariableIndentationOutputStream* vios);
   void Dump(VariableIndentationOutputStream* vios,
             const CodeInfo& info,
             const MethodInfo& method_info,
             uint16_t* number_of_dex_registers) const;
-
- private:
-  ALWAYS_INLINE BitMemoryRegion GetRegionAtDepth(const InlineInfoEncoding& encoding,
-                                                 uint32_t depth) const {
-    size_t entry_size = encoding.BitSize();
-    DCHECK_GT(entry_size, 0u);
-    return region_.Subregion(depth * entry_size, entry_size);
-  }
-
-  BitMemoryRegion region_;
 };
 
-// Bit sized region encoding, may be more than 255 bits.
-class BitRegionEncoding {
+class InvokeInfo : public BitTable<3>::Accessor {
  public:
-  uint32_t num_bits = 0;
+  enum Field {
+    kNativePcOffset,
+    kInvokeType,
+    kMethodIndexIdx,
+    kCount,
+  };
 
-  ALWAYS_INLINE size_t BitSize() const {
-    return num_bits;
-  }
+  InvokeInfo(const BitTable<kCount>* table, uint32_t row)
+    : BitTable<kCount>::Accessor(table, row) {}
 
-  template<typename Vector>
-  void Encode(Vector* dest) const {
-    EncodeUnsignedLeb128(dest, num_bits);  // Use leb in case num_bits is greater than 255.
-  }
-
-  void Decode(const uint8_t** ptr) {
-    num_bits = DecodeUnsignedLeb128(ptr);
-  }
-};
-
-// A table of bit sized encodings.
-template <typename Encoding>
-struct BitEncodingTable {
-  static constexpr size_t kInvalidOffset = static_cast<size_t>(-1);
-  // How the encoding is laid out (serialized).
-  Encoding encoding;
-
-  // Number of entries in the table (serialized).
-  size_t num_entries;
-
-  // Bit offset for the base of the table (computed).
-  size_t bit_offset = kInvalidOffset;
-
-  template<typename Vector>
-  void Encode(Vector* dest) const {
-    EncodeUnsignedLeb128(dest, num_entries);
-    encoding.Encode(dest);
-  }
-
-  ALWAYS_INLINE void Decode(const uint8_t** ptr) {
-    num_entries = DecodeUnsignedLeb128(ptr);
-    encoding.Decode(ptr);
-  }
-
-  // Set the bit offset in the table and adds the space used by the table to offset.
-  void UpdateBitOffset(size_t* offset) {
-    DCHECK(offset != nullptr);
-    bit_offset = *offset;
-    *offset += encoding.BitSize() * num_entries;
-  }
-
-  // Return the bit region for the map at index i.
-  ALWAYS_INLINE BitMemoryRegion BitRegion(MemoryRegion region, size_t index) const {
-    DCHECK_NE(bit_offset, kInvalidOffset) << "Invalid table offset";
-    DCHECK_LT(index, num_entries);
-    const size_t map_size = encoding.BitSize();
-    return BitMemoryRegion(region, bit_offset + index * map_size, map_size);
-  }
-};
-
-// A byte sized table of possible variable sized encodings.
-struct ByteSizedTable {
-  static constexpr size_t kInvalidOffset = static_cast<size_t>(-1);
-
-  // Number of entries in the table (serialized).
-  size_t num_entries = 0;
-
-  // Number of bytes of the table (serialized).
-  size_t num_bytes;
-
-  // Bit offset for the base of the table (computed).
-  size_t byte_offset = kInvalidOffset;
-
-  template<typename Vector>
-  void Encode(Vector* dest) const {
-    EncodeUnsignedLeb128(dest, num_entries);
-    EncodeUnsignedLeb128(dest, num_bytes);
-  }
-
-  ALWAYS_INLINE void Decode(const uint8_t** ptr) {
-    num_entries = DecodeUnsignedLeb128(ptr);
-    num_bytes = DecodeUnsignedLeb128(ptr);
-  }
-
-  // Set the bit offset of the table. Adds the total bit size of the table to offset.
-  void UpdateBitOffset(size_t* offset) {
-    DCHECK(offset != nullptr);
-    DCHECK_ALIGNED(*offset, kBitsPerByte);
-    byte_offset = *offset / kBitsPerByte;
-    *offset += num_bytes * kBitsPerByte;
-  }
-};
-
-// Format is [native pc, invoke type, method index].
-class InvokeInfoEncoding {
- public:
-  void SetFromSizes(size_t native_pc_max,
-                    size_t invoke_type_max,
-                    size_t method_index_max) {
-    total_bit_size_ = 0;
-    DCHECK_EQ(kNativePcBitOffset, total_bit_size_);
-    total_bit_size_ += MinimumBitsToStore(native_pc_max);
-    invoke_type_bit_offset_ = total_bit_size_;
-    total_bit_size_ += MinimumBitsToStore(invoke_type_max);
-    method_index_bit_offset_ = total_bit_size_;
-    total_bit_size_ += MinimumBitsToStore(method_index_max);
-  }
-
-  ALWAYS_INLINE FieldEncoding GetNativePcEncoding() const {
-    return FieldEncoding(kNativePcBitOffset, invoke_type_bit_offset_);
-  }
-
-  ALWAYS_INLINE FieldEncoding GetInvokeTypeEncoding() const {
-    return FieldEncoding(invoke_type_bit_offset_, method_index_bit_offset_);
-  }
-
-  ALWAYS_INLINE FieldEncoding GetMethodIndexEncoding() const {
-    return FieldEncoding(method_index_bit_offset_, total_bit_size_);
-  }
-
-  ALWAYS_INLINE size_t BitSize() const {
-    return total_bit_size_;
-  }
-
-  template<typename Vector>
-  void Encode(Vector* dest) const {
-    static_assert(alignof(InvokeInfoEncoding) == 1, "Should not require alignment");
-    const uint8_t* ptr = reinterpret_cast<const uint8_t*>(this);
-    dest->insert(dest->end(), ptr, ptr + sizeof(*this));
-  }
-
-  void Decode(const uint8_t** ptr) {
-    *this = *reinterpret_cast<const InvokeInfoEncoding*>(*ptr);
-    *ptr += sizeof(*this);
-  }
-
- private:
-  static constexpr uint8_t kNativePcBitOffset = 0;
-  uint8_t invoke_type_bit_offset_;
-  uint8_t method_index_bit_offset_;
-  uint8_t total_bit_size_;
-};
-
-class InvokeInfo {
- public:
-  explicit InvokeInfo(BitMemoryRegion region) : region_(region) {}
-
-  ALWAYS_INLINE uint32_t GetNativePcOffset(const InvokeInfoEncoding& encoding,
-                                           InstructionSet instruction_set) const {
-    CodeOffset offset(
-        CodeOffset::FromCompressedOffset(encoding.GetNativePcEncoding().Load(region_)));
+  ALWAYS_INLINE uint32_t GetNativePcOffset(InstructionSet instruction_set) const {
+    CodeOffset offset(CodeOffset::FromCompressedOffset(Get<kNativePcOffset>()));
     return offset.Uint32Value(instruction_set);
   }
 
-  ALWAYS_INLINE void SetNativePcCodeOffset(const InvokeInfoEncoding& encoding,
-                                           CodeOffset native_pc_offset) {
-    encoding.GetNativePcEncoding().Store(region_, native_pc_offset.CompressedValue());
+  uint32_t GetInvokeType() const { return Get<kInvokeType>(); }
+
+  uint32_t GetMethodIndexIdx() const { return Get<kMethodIndexIdx>(); }
+
+  uint32_t GetMethodIndex(MethodInfo method_info) const {
+    return method_info.GetMethodIndex(GetMethodIndexIdx());
   }
-
-  ALWAYS_INLINE uint32_t GetInvokeType(const InvokeInfoEncoding& encoding) const {
-    return encoding.GetInvokeTypeEncoding().Load(region_);
-  }
-
-  ALWAYS_INLINE void SetInvokeType(const InvokeInfoEncoding& encoding, uint32_t invoke_type) {
-    encoding.GetInvokeTypeEncoding().Store(region_, invoke_type);
-  }
-
-  ALWAYS_INLINE uint32_t GetMethodIndexIdx(const InvokeInfoEncoding& encoding) const {
-    return encoding.GetMethodIndexEncoding().Load(region_);
-  }
-
-  ALWAYS_INLINE void SetMethodIndexIdx(const InvokeInfoEncoding& encoding,
-                                       uint32_t method_index_idx) {
-    encoding.GetMethodIndexEncoding().Store(region_, method_index_idx);
-  }
-
-  ALWAYS_INLINE uint32_t GetMethodIndex(const InvokeInfoEncoding& encoding,
-                                        MethodInfo method_info) const {
-    return method_info.GetMethodIndex(GetMethodIndexIdx(encoding));
-  }
-
-  bool IsValid() const { return region_.IsValid(); }
-
- private:
-  BitMemoryRegion region_;
-};
-
-// Most of the fields are encoded as ULEB128 to save space.
-struct CodeInfoEncoding {
-  using SizeType = uint32_t;
-
-  static constexpr SizeType kInvalidSize = std::numeric_limits<SizeType>::max();
-
-  // Byte sized tables go first to avoid unnecessary alignment bits.
-  ByteSizedTable dex_register_map;
-  ByteSizedTable location_catalog;
-  BitEncodingTable<StackMapEncoding> stack_map;
-  BitEncodingTable<BitRegionEncoding> register_mask;
-  BitEncodingTable<BitRegionEncoding> stack_mask;
-  BitEncodingTable<InvokeInfoEncoding> invoke_info;
-  BitEncodingTable<InlineInfoEncoding> inline_info;
-
-  CodeInfoEncoding() {}
-
-  explicit CodeInfoEncoding(const void* data) {
-    const uint8_t* ptr = reinterpret_cast<const uint8_t*>(data);
-    dex_register_map.Decode(&ptr);
-    location_catalog.Decode(&ptr);
-    stack_map.Decode(&ptr);
-    register_mask.Decode(&ptr);
-    stack_mask.Decode(&ptr);
-    invoke_info.Decode(&ptr);
-    if (stack_map.encoding.GetInlineInfoEncoding().BitSize() > 0) {
-      inline_info.Decode(&ptr);
-    } else {
-      inline_info = BitEncodingTable<InlineInfoEncoding>();
-    }
-    cache_header_size =
-        dchecked_integral_cast<SizeType>(ptr - reinterpret_cast<const uint8_t*>(data));
-    ComputeTableOffsets();
-  }
-
-  // Compress is not const since it calculates cache_header_size. This is used by PrepareForFillIn.
-  template<typename Vector>
-  void Compress(Vector* dest) {
-    dex_register_map.Encode(dest);
-    location_catalog.Encode(dest);
-    stack_map.Encode(dest);
-    register_mask.Encode(dest);
-    stack_mask.Encode(dest);
-    invoke_info.Encode(dest);
-    if (stack_map.encoding.GetInlineInfoEncoding().BitSize() > 0) {
-      inline_info.Encode(dest);
-    }
-    cache_header_size = dest->size();
-  }
-
-  ALWAYS_INLINE void ComputeTableOffsets() {
-    // Skip the header.
-    size_t bit_offset = HeaderSize() * kBitsPerByte;
-    // The byte tables must be aligned so they must go first.
-    dex_register_map.UpdateBitOffset(&bit_offset);
-    location_catalog.UpdateBitOffset(&bit_offset);
-    // Other tables don't require alignment.
-    stack_map.UpdateBitOffset(&bit_offset);
-    register_mask.UpdateBitOffset(&bit_offset);
-    stack_mask.UpdateBitOffset(&bit_offset);
-    invoke_info.UpdateBitOffset(&bit_offset);
-    inline_info.UpdateBitOffset(&bit_offset);
-    cache_non_header_size = RoundUp(bit_offset, kBitsPerByte) / kBitsPerByte - HeaderSize();
-  }
-
-  ALWAYS_INLINE size_t HeaderSize() const {
-    DCHECK_NE(cache_header_size, kInvalidSize) << "Uninitialized";
-    return cache_header_size;
-  }
-
-  ALWAYS_INLINE size_t NonHeaderSize() const {
-    DCHECK_NE(cache_non_header_size, kInvalidSize) << "Uninitialized";
-    return cache_non_header_size;
-  }
-
- private:
-  // Computed fields (not serialized).
-  // Header size in bytes, cached to avoid needing to re-decoding the encoding in HeaderSize.
-  SizeType cache_header_size = kInvalidSize;
-  // Non header size in bytes, cached to avoid needing to re-decoding the encoding in NonHeaderSize.
-  SizeType cache_non_header_size = kInvalidSize;
 };
 
 /**
  * Wrapper around all compiler information collected for a method.
  * The information is of the form:
  *
- *   [CodeInfoEncoding, DexRegisterMap+, DexLocationCatalog+, StackMap+, RegisterMask+, StackMask+,
- *    InlineInfo*]
+ *   [BitTable<Header>, BitTable<StackMap>, BitTable<RegisterMask>, BitTable<InlineInfo>,
+ *    BitTable<InvokeInfo>, BitTable<StackMask>, DexRegisterMap, DexLocationCatalog]
  *
- * where CodeInfoEncoding is of the form:
- *
- *   [ByteSizedTable(dex_register_map), ByteSizedTable(location_catalog),
- *    BitEncodingTable<StackMapEncoding>, BitEncodingTable<BitRegionEncoding>,
- *    BitEncodingTable<BitRegionEncoding>, BitEncodingTable<InlineInfoEncoding>]
  */
 class CodeInfo {
  public:
-  explicit CodeInfo(MemoryRegion region) : region_(region) {
-  }
-
   explicit CodeInfo(const void* data) {
-    CodeInfoEncoding encoding = CodeInfoEncoding(data);
-    region_ = MemoryRegion(const_cast<void*>(data),
-                           encoding.HeaderSize() + encoding.NonHeaderSize());
+    Decode(reinterpret_cast<const uint8_t*>(data));
   }
 
-  CodeInfoEncoding ExtractEncoding() const {
-    CodeInfoEncoding encoding(region_.begin());
-    AssertValidStackMap(encoding);
-    return encoding;
+  explicit CodeInfo(MemoryRegion region) : CodeInfo(region.begin()) {
+    DCHECK_EQ(size_, region.size());
   }
 
-  bool HasInlineInfo(const CodeInfoEncoding& encoding) const {
-    return encoding.stack_map.encoding.GetInlineInfoEncoding().BitSize() > 0;
+  explicit CodeInfo(const OatQuickMethodHeader* header)
+    : CodeInfo(header->GetOptimizedCodeInfoPtr()) {
   }
 
-  DexRegisterLocationCatalog GetDexRegisterLocationCatalog(const CodeInfoEncoding& encoding) const {
-    return DexRegisterLocationCatalog(region_.Subregion(encoding.location_catalog.byte_offset,
-                                                        encoding.location_catalog.num_bytes));
+  size_t Size() const {
+    return size_;
   }
 
-  ALWAYS_INLINE size_t GetNumberOfStackMaskBits(const CodeInfoEncoding& encoding) const {
-    return encoding.stack_mask.encoding.BitSize();
+  bool HasInlineInfo() const {
+    return stack_maps_.NumColumnBits(StackMap::kInlineInfoIndex) != 0;
   }
 
-  ALWAYS_INLINE StackMap GetStackMapAt(size_t index, const CodeInfoEncoding& encoding) const {
-    return StackMap(encoding.stack_map.BitRegion(region_, index));
+  DexRegisterLocationCatalog GetDexRegisterLocationCatalog() const {
+    return DexRegisterLocationCatalog(location_catalog_);
   }
 
-  BitMemoryRegion GetStackMask(size_t index, const CodeInfoEncoding& encoding) const {
-    return encoding.stack_mask.BitRegion(region_, index);
+  ALWAYS_INLINE size_t GetNumberOfStackMaskBits() const {
+    return stack_mask_bits_;
   }
 
-  BitMemoryRegion GetStackMaskOf(const CodeInfoEncoding& encoding,
-                                 const StackMap& stack_map) const {
-    return GetStackMask(stack_map.GetStackMaskIndex(encoding.stack_map.encoding), encoding);
+  ALWAYS_INLINE StackMap GetStackMapAt(size_t index) const {
+    return StackMap(&stack_maps_, index);
   }
 
-  BitMemoryRegion GetRegisterMask(size_t index, const CodeInfoEncoding& encoding) const {
-    return encoding.register_mask.BitRegion(region_, index);
+  BitMemoryRegion GetStackMask(size_t index) const {
+    return stack_masks_.Subregion(index * stack_mask_bits_, stack_mask_bits_);
   }
 
-  uint32_t GetRegisterMaskOf(const CodeInfoEncoding& encoding, const StackMap& stack_map) const {
-    size_t index = stack_map.GetRegisterMaskIndex(encoding.stack_map.encoding);
-    return GetRegisterMask(index, encoding).LoadBits(0u, encoding.register_mask.encoding.BitSize());
+  BitMemoryRegion GetStackMaskOf(const StackMap& stack_map) const {
+    return GetStackMask(stack_map.GetStackMaskIndex());
   }
 
-  uint32_t GetNumberOfLocationCatalogEntries(const CodeInfoEncoding& encoding) const {
-    return encoding.location_catalog.num_entries;
+  uint32_t GetRegisterMaskOf(const StackMap& stack_map) const {
+    return register_masks_.Get(stack_map.GetRegisterMaskIndex());
   }
 
-  uint32_t GetDexRegisterLocationCatalogSize(const CodeInfoEncoding& encoding) const {
-    return encoding.location_catalog.num_bytes;
+  uint32_t GetNumberOfLocationCatalogEntries() const {
+    return location_catalog_entries_;
   }
 
-  uint32_t GetNumberOfStackMaps(const CodeInfoEncoding& encoding) const {
-    return encoding.stack_map.num_entries;
+  uint32_t GetDexRegisterLocationCatalogSize() const {
+    return location_catalog_.size();
   }
 
-  // Get the size of all the stack maps of this CodeInfo object, in bits. Not byte aligned.
-  ALWAYS_INLINE size_t GetStackMapsSizeInBits(const CodeInfoEncoding& encoding) const {
-    return encoding.stack_map.encoding.BitSize() * GetNumberOfStackMaps(encoding);
+  uint32_t GetNumberOfStackMaps() const {
+    return stack_maps_.NumRows();
   }
 
-  InvokeInfo GetInvokeInfo(const CodeInfoEncoding& encoding, size_t index) const {
-    return InvokeInfo(encoding.invoke_info.BitRegion(region_, index));
+  InvokeInfo GetInvokeInfo(size_t index) const {
+    return InvokeInfo(&invoke_infos_, index);
   }
 
   DexRegisterMap GetDexRegisterMapOf(StackMap stack_map,
-                                     const CodeInfoEncoding& encoding,
                                      size_t number_of_dex_registers) const {
-    if (!stack_map.HasDexRegisterMap(encoding.stack_map.encoding)) {
+    if (!stack_map.HasDexRegisterMap()) {
       return DexRegisterMap();
     }
-    const uint32_t offset = encoding.dex_register_map.byte_offset +
-        stack_map.GetDexRegisterMapOffset(encoding.stack_map.encoding);
-    size_t size = ComputeDexRegisterMapSizeOf(encoding, offset, number_of_dex_registers);
-    return DexRegisterMap(region_.Subregion(offset, size));
+    const uint32_t offset = stack_map.GetDexRegisterMapOffset();
+    size_t size = ComputeDexRegisterMapSizeOf(offset, number_of_dex_registers);
+    return DexRegisterMap(dex_register_maps_.Subregion(offset, size));
   }
 
-  size_t GetDexRegisterMapsSize(const CodeInfoEncoding& encoding,
-                                uint32_t number_of_dex_registers) const {
+  size_t GetDexRegisterMapsSize(uint32_t number_of_dex_registers) const {
     size_t total = 0;
-    for (size_t i = 0, e = GetNumberOfStackMaps(encoding); i < e; ++i) {
-      StackMap stack_map = GetStackMapAt(i, encoding);
-      DexRegisterMap map(GetDexRegisterMapOf(stack_map, encoding, number_of_dex_registers));
+    for (size_t i = 0, e = GetNumberOfStackMaps(); i < e; ++i) {
+      StackMap stack_map = GetStackMapAt(i);
+      DexRegisterMap map(GetDexRegisterMapOf(stack_map, number_of_dex_registers));
       total += map.Size();
     }
     return total;
@@ -1453,38 +892,30 @@
   // Return the `DexRegisterMap` pointed by `inline_info` at depth `depth`.
   DexRegisterMap GetDexRegisterMapAtDepth(uint8_t depth,
                                           InlineInfo inline_info,
-                                          const CodeInfoEncoding& encoding,
                                           uint32_t number_of_dex_registers) const {
-    if (!inline_info.HasDexRegisterMapAtDepth(encoding.inline_info.encoding, depth)) {
+    if (!inline_info.HasDexRegisterMapAtDepth(depth)) {
       return DexRegisterMap();
     } else {
-      uint32_t offset = encoding.dex_register_map.byte_offset +
-          inline_info.GetDexRegisterMapOffsetAtDepth(encoding.inline_info.encoding, depth);
-      size_t size = ComputeDexRegisterMapSizeOf(encoding, offset, number_of_dex_registers);
-      return DexRegisterMap(region_.Subregion(offset, size));
+      uint32_t offset = inline_info.GetDexRegisterMapOffsetAtDepth(depth);
+      size_t size = ComputeDexRegisterMapSizeOf(offset, number_of_dex_registers);
+      return DexRegisterMap(dex_register_maps_.Subregion(offset, size));
     }
   }
 
-  InlineInfo GetInlineInfo(size_t index, const CodeInfoEncoding& encoding) const {
-    // Since we do not know the depth, we just return the whole remaining map. The caller may
-    // access the inline info for arbitrary depths. To return the precise inline info we would need
-    // to count the depth before returning.
-    // TODO: Clean this up.
-    const size_t bit_offset = encoding.inline_info.bit_offset +
-        index * encoding.inline_info.encoding.BitSize();
-    return InlineInfo(BitMemoryRegion(region_, bit_offset, region_.size_in_bits() - bit_offset));
+  InlineInfo GetInlineInfo(size_t index) const {
+    return InlineInfo(&inline_infos_, index);
   }
 
-  InlineInfo GetInlineInfoOf(StackMap stack_map, const CodeInfoEncoding& encoding) const {
-    DCHECK(stack_map.HasInlineInfo(encoding.stack_map.encoding));
-    uint32_t index = stack_map.GetInlineInfoIndex(encoding.stack_map.encoding);
-    return GetInlineInfo(index, encoding);
+  InlineInfo GetInlineInfoOf(StackMap stack_map) const {
+    DCHECK(stack_map.HasInlineInfo());
+    uint32_t index = stack_map.GetInlineInfoIndex();
+    return GetInlineInfo(index);
   }
 
-  StackMap GetStackMapForDexPc(uint32_t dex_pc, const CodeInfoEncoding& encoding) const {
-    for (size_t i = 0, e = GetNumberOfStackMaps(encoding); i < e; ++i) {
-      StackMap stack_map = GetStackMapAt(i, encoding);
-      if (stack_map.GetDexPc(encoding.stack_map.encoding) == dex_pc) {
+  StackMap GetStackMapForDexPc(uint32_t dex_pc) const {
+    for (size_t i = 0, e = GetNumberOfStackMaps(); i < e; ++i) {
+      StackMap stack_map = GetStackMapAt(i);
+      if (stack_map.GetDexPc() == dex_pc) {
         return stack_map;
       }
     }
@@ -1493,40 +924,39 @@
 
   // Searches the stack map list backwards because catch stack maps are stored
   // at the end.
-  StackMap GetCatchStackMapForDexPc(uint32_t dex_pc, const CodeInfoEncoding& encoding) const {
-    for (size_t i = GetNumberOfStackMaps(encoding); i > 0; --i) {
-      StackMap stack_map = GetStackMapAt(i - 1, encoding);
-      if (stack_map.GetDexPc(encoding.stack_map.encoding) == dex_pc) {
+  StackMap GetCatchStackMapForDexPc(uint32_t dex_pc) const {
+    for (size_t i = GetNumberOfStackMaps(); i > 0; --i) {
+      StackMap stack_map = GetStackMapAt(i - 1);
+      if (stack_map.GetDexPc() == dex_pc) {
         return stack_map;
       }
     }
     return StackMap();
   }
 
-  StackMap GetOsrStackMapForDexPc(uint32_t dex_pc, const CodeInfoEncoding& encoding) const {
-    size_t e = GetNumberOfStackMaps(encoding);
+  StackMap GetOsrStackMapForDexPc(uint32_t dex_pc) const {
+    size_t e = GetNumberOfStackMaps();
     if (e == 0) {
       // There cannot be OSR stack map if there is no stack map.
       return StackMap();
     }
     // Walk over all stack maps. If two consecutive stack maps are identical, then we
     // have found a stack map suitable for OSR.
-    const StackMapEncoding& stack_map_encoding = encoding.stack_map.encoding;
     for (size_t i = 0; i < e - 1; ++i) {
-      StackMap stack_map = GetStackMapAt(i, encoding);
-      if (stack_map.GetDexPc(stack_map_encoding) == dex_pc) {
-        StackMap other = GetStackMapAt(i + 1, encoding);
-        if (other.GetDexPc(stack_map_encoding) == dex_pc &&
-            other.GetNativePcOffset(stack_map_encoding, kRuntimeISA) ==
-                stack_map.GetNativePcOffset(stack_map_encoding, kRuntimeISA)) {
-          DCHECK_EQ(other.GetDexRegisterMapOffset(stack_map_encoding),
-                    stack_map.GetDexRegisterMapOffset(stack_map_encoding));
-          DCHECK(!stack_map.HasInlineInfo(stack_map_encoding));
+      StackMap stack_map = GetStackMapAt(i);
+      if (stack_map.GetDexPc() == dex_pc) {
+        StackMap other = GetStackMapAt(i + 1);
+        if (other.GetDexPc() == dex_pc &&
+            other.GetNativePcOffset(kRuntimeISA) ==
+                stack_map.GetNativePcOffset(kRuntimeISA)) {
+          DCHECK_EQ(other.GetDexRegisterMapOffset(),
+                    stack_map.GetDexRegisterMapOffset());
+          DCHECK(!stack_map.HasInlineInfo());
           if (i < e - 2) {
             // Make sure there are not three identical stack maps following each other.
             DCHECK_NE(
-                stack_map.GetNativePcOffset(stack_map_encoding, kRuntimeISA),
-                GetStackMapAt(i + 2, encoding).GetNativePcOffset(stack_map_encoding, kRuntimeISA));
+                stack_map.GetNativePcOffset(kRuntimeISA),
+                GetStackMapAt(i + 2).GetNativePcOffset(kRuntimeISA));
           }
           return stack_map;
         }
@@ -1535,30 +965,27 @@
     return StackMap();
   }
 
-  StackMap GetStackMapForNativePcOffset(uint32_t native_pc_offset,
-                                        const CodeInfoEncoding& encoding) const {
+  StackMap GetStackMapForNativePcOffset(uint32_t native_pc_offset) const {
     // TODO: Safepoint stack maps are sorted by native_pc_offset but catch stack
     //       maps are not. If we knew that the method does not have try/catch,
     //       we could do binary search.
-    for (size_t i = 0, e = GetNumberOfStackMaps(encoding); i < e; ++i) {
-      StackMap stack_map = GetStackMapAt(i, encoding);
-      if (stack_map.GetNativePcOffset(encoding.stack_map.encoding, kRuntimeISA) ==
-          native_pc_offset) {
+    for (size_t i = 0, e = GetNumberOfStackMaps(); i < e; ++i) {
+      StackMap stack_map = GetStackMapAt(i);
+      if (stack_map.GetNativePcOffset(kRuntimeISA) == native_pc_offset) {
         return stack_map;
       }
     }
     return StackMap();
   }
 
-  InvokeInfo GetInvokeInfoForNativePcOffset(uint32_t native_pc_offset,
-                                            const CodeInfoEncoding& encoding) {
-    for (size_t index = 0; index < encoding.invoke_info.num_entries; index++) {
-      InvokeInfo item = GetInvokeInfo(encoding, index);
-      if (item.GetNativePcOffset(encoding.invoke_info.encoding, kRuntimeISA) == native_pc_offset) {
+  InvokeInfo GetInvokeInfoForNativePcOffset(uint32_t native_pc_offset) {
+    for (size_t index = 0; index < invoke_infos_.NumRows(); index++) {
+      InvokeInfo item = GetInvokeInfo(index);
+      if (item.GetNativePcOffset(kRuntimeISA) == native_pc_offset) {
         return item;
       }
     }
-    return InvokeInfo(BitMemoryRegion());
+    return InvokeInfo(&invoke_infos_, -1);
   }
 
   // Dump this CodeInfo object on `os`.  `code_offset` is the (absolute)
@@ -1573,23 +1000,10 @@
             InstructionSet instruction_set,
             const MethodInfo& method_info) const;
 
-  // Check that the code info has valid stack map and abort if it does not.
-  void AssertValidStackMap(const CodeInfoEncoding& encoding) const {
-    if (region_.size() != 0 && region_.size_in_bits() < GetStackMapsSizeInBits(encoding)) {
-      LOG(FATAL) << region_.size() << "\n"
-                 << encoding.HeaderSize() << "\n"
-                 << encoding.NonHeaderSize() << "\n"
-                 << encoding.location_catalog.num_entries << "\n"
-                 << encoding.stack_map.num_entries << "\n"
-                 << encoding.stack_map.encoding.BitSize();
-    }
-  }
-
  private:
   // Compute the size of the Dex register map associated to the stack map at
   // `dex_register_map_offset_in_code_info`.
-  size_t ComputeDexRegisterMapSizeOf(const CodeInfoEncoding& encoding,
-                                     uint32_t dex_register_map_offset_in_code_info,
+  size_t ComputeDexRegisterMapSizeOf(uint32_t dex_register_map_offset,
                                      uint16_t number_of_dex_registers) const {
     // Offset where the actual mapping data starts within art::DexRegisterMap.
     size_t location_mapping_data_offset_in_dex_register_map =
@@ -1597,12 +1011,12 @@
     // Create a temporary art::DexRegisterMap to be able to call
     // art::DexRegisterMap::GetNumberOfLiveDexRegisters and
     DexRegisterMap dex_register_map_without_locations(
-        MemoryRegion(region_.Subregion(dex_register_map_offset_in_code_info,
-                                       location_mapping_data_offset_in_dex_register_map)));
+        MemoryRegion(dex_register_maps_.Subregion(dex_register_map_offset,
+                                        location_mapping_data_offset_in_dex_register_map)));
     size_t number_of_live_dex_registers =
         dex_register_map_without_locations.GetNumberOfLiveDexRegisters(number_of_dex_registers);
     size_t location_mapping_data_size_in_bits =
-        DexRegisterMap::SingleEntrySizeInBits(GetNumberOfLocationCatalogEntries(encoding))
+        DexRegisterMap::SingleEntrySizeInBits(GetNumberOfLocationCatalogEntries())
         * number_of_live_dex_registers;
     size_t location_mapping_data_size_in_bytes =
         RoundUp(location_mapping_data_size_in_bits, kBitsPerByte) / kBitsPerByte;
@@ -1611,37 +1025,42 @@
     return dex_register_map_size;
   }
 
-  // Compute the size of a Dex register location catalog starting at offset `origin`
-  // in `region_` and containing `number_of_dex_locations` entries.
-  size_t ComputeDexRegisterLocationCatalogSize(uint32_t origin,
-                                               uint32_t number_of_dex_locations) const {
-    // TODO: Ideally, we would like to use art::DexRegisterLocationCatalog::Size or
-    // art::DexRegisterLocationCatalog::FindLocationOffset, but the
-    // DexRegisterLocationCatalog is not yet built.  Try to factor common code.
-    size_t offset = origin + DexRegisterLocationCatalog::kFixedSize;
-
-    // Skip the first `number_of_dex_locations - 1` entries.
-    for (uint16_t i = 0; i < number_of_dex_locations; ++i) {
-      // Read the first next byte and inspect its first 3 bits to decide
-      // whether it is a short or a large location.
-      DexRegisterLocationCatalog::ShortLocation first_byte =
-          region_.LoadUnaligned<DexRegisterLocationCatalog::ShortLocation>(offset);
-      DexRegisterLocation::Kind kind =
-          DexRegisterLocationCatalog::ExtractKindFromShortLocation(first_byte);
-      if (DexRegisterLocation::IsShortLocationKind(kind)) {
-        // Short location.  Skip the current byte.
-        offset += DexRegisterLocationCatalog::SingleShortEntrySize();
-      } else {
-        // Large location.  Skip the 5 next bytes.
-        offset += DexRegisterLocationCatalog::SingleLargeEntrySize();
-      }
-    }
-    size_t size = offset - origin;
-    return size;
+  MemoryRegion DecodeMemoryRegion(MemoryRegion& region, size_t* bit_offset) {
+    size_t length = DecodeVarintBits(BitMemoryRegion(region), bit_offset);
+    size_t offset = BitsToBytesRoundUp(*bit_offset);;
+    *bit_offset = (offset + length) * kBitsPerByte;
+    return region.Subregion(offset, length);
   }
 
-  MemoryRegion region_;
-  friend class StackMapStream;
+  void Decode(const uint8_t* data) {
+    size_t non_header_size = DecodeUnsignedLeb128(&data);
+    MemoryRegion region(const_cast<uint8_t*>(data), non_header_size);
+    BitMemoryRegion bit_region(region);
+    size_t bit_offset = 0;
+    size_ = UnsignedLeb128Size(non_header_size) + non_header_size;
+    dex_register_maps_ = DecodeMemoryRegion(region, &bit_offset);
+    location_catalog_entries_ = DecodeVarintBits(bit_region, &bit_offset);
+    location_catalog_ = DecodeMemoryRegion(region, &bit_offset);
+    stack_maps_.Decode(bit_region, &bit_offset);
+    invoke_infos_.Decode(bit_region, &bit_offset);
+    inline_infos_.Decode(bit_region, &bit_offset);
+    register_masks_.Decode(bit_region, &bit_offset);
+    stack_mask_bits_ = DecodeVarintBits(bit_region, &bit_offset);
+    stack_masks_ = bit_region.Subregion(bit_offset, non_header_size * kBitsPerByte - bit_offset);
+  }
+
+  size_t size_;
+  MemoryRegion dex_register_maps_;
+  uint32_t location_catalog_entries_;
+  MemoryRegion location_catalog_;
+  BitTable<StackMap::Field::kCount> stack_maps_;
+  BitTable<InvokeInfo::Field::kCount> invoke_infos_;
+  BitTable<InlineInfo::Field::kCount> inline_infos_;
+  BitTable<1> register_masks_;
+  uint32_t stack_mask_bits_ = 0;
+  BitMemoryRegion stack_masks_;
+
+  friend class OatDumper;
 };
 
 #undef ELEMENT_BYTE_OFFSET_AFTER
diff --git a/runtime/thread.cc b/runtime/thread.cc
index 51b3752..5a80929 100644
--- a/runtime/thread.cc
+++ b/runtime/thread.cc
@@ -3559,16 +3559,15 @@
       StackReference<mirror::Object>* vreg_base = reinterpret_cast<StackReference<mirror::Object>*>(
           reinterpret_cast<uintptr_t>(cur_quick_frame));
       uintptr_t native_pc_offset = method_header->NativeQuickPcOffset(GetCurrentQuickFramePc());
-      CodeInfo code_info = method_header->GetOptimizedCodeInfo();
-      CodeInfoEncoding encoding = code_info.ExtractEncoding();
-      StackMap map = code_info.GetStackMapForNativePcOffset(native_pc_offset, encoding);
+      CodeInfo code_info(method_header);
+      StackMap map = code_info.GetStackMapForNativePcOffset(native_pc_offset);
       DCHECK(map.IsValid());
 
-      T vreg_info(m, code_info, encoding, map, visitor_);
+      T vreg_info(m, code_info, map, visitor_);
 
       // Visit stack entries that hold pointers.
-      const size_t number_of_bits = code_info.GetNumberOfStackMaskBits(encoding);
-      BitMemoryRegion stack_mask = code_info.GetStackMaskOf(encoding, map);
+      const size_t number_of_bits = code_info.GetNumberOfStackMaskBits();
+      BitMemoryRegion stack_mask = code_info.GetStackMaskOf(map);
       for (size_t i = 0; i < number_of_bits; ++i) {
         if (stack_mask.LoadBit(i)) {
           StackReference<mirror::Object>* ref_addr = vreg_base + i;
@@ -3583,7 +3582,7 @@
         }
       }
       // Visit callee-save registers that hold pointers.
-      uint32_t register_mask = code_info.GetRegisterMaskOf(encoding, map);
+      uint32_t register_mask = code_info.GetRegisterMaskOf(map);
       for (size_t i = 0; i < BitSizeOf<uint32_t>(); ++i) {
         if (register_mask & (1 << i)) {
           mirror::Object** ref_addr = reinterpret_cast<mirror::Object**>(GetGPRAddress(i));
@@ -3631,7 +3630,6 @@
     struct UndefinedVRegInfo {
       UndefinedVRegInfo(ArtMethod* method ATTRIBUTE_UNUSED,
                         const CodeInfo& code_info ATTRIBUTE_UNUSED,
-                        const CodeInfoEncoding& encoding ATTRIBUTE_UNUSED,
                         const StackMap& map ATTRIBUTE_UNUSED,
                         RootVisitor& _visitor)
           : visitor(_visitor) {
@@ -3662,14 +3660,11 @@
     struct StackMapVRegInfo {
       StackMapVRegInfo(ArtMethod* method,
                        const CodeInfo& _code_info,
-                       const CodeInfoEncoding& _encoding,
                        const StackMap& map,
                        RootVisitor& _visitor)
           : number_of_dex_registers(method->DexInstructionData().RegistersSize()),
             code_info(_code_info),
-            encoding(_encoding),
             dex_register_map(code_info.GetDexRegisterMapOf(map,
-                                                           encoding,
                                                            number_of_dex_registers)),
             visitor(_visitor) {
       }
@@ -3684,7 +3679,7 @@
         bool found = false;
         for (size_t dex_reg = 0; dex_reg != number_of_dex_registers; ++dex_reg) {
           DexRegisterLocation location = dex_register_map.GetDexRegisterLocation(
-              dex_reg, number_of_dex_registers, code_info, encoding);
+              dex_reg, number_of_dex_registers, code_info);
           if (location.GetKind() == kind && static_cast<size_t>(location.GetValue()) == index) {
             visitor(ref, dex_reg, stack_visitor);
             found = true;
@@ -3718,7 +3713,6 @@
 
       size_t number_of_dex_registers;
       const CodeInfo& code_info;
-      const CodeInfoEncoding& encoding;
       DexRegisterMap dex_register_map;
       RootVisitor& visitor;
     };
diff --git a/test/450-checker-types/build b/test/450-checker-types/build
index 3721955..49292c9 100755
--- a/test/450-checker-types/build
+++ b/test/450-checker-types/build
@@ -20,7 +20,4 @@
 # Also disable desugar because it is missing in jack platform builds.
 export DESUGAR=false
 
-# See b/65168732
-export USE_D8=false
-
 ./default-build "$@"
diff --git a/test/450-checker-types/smali/Main2.smali b/test/450-checker-types/smali/Main2.smali
new file mode 100644
index 0000000..5f11be3
--- /dev/null
+++ b/test/450-checker-types/smali/Main2.smali
@@ -0,0 +1,55 @@
+# Copyright 2018 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+.class LMain2;
+.super Ljava/lang/Object;
+.source "Main2.java"
+
+
+# direct methods
+.method constructor <init>()V
+    .registers 1
+
+    .prologue
+    .line 17
+    invoke-direct {p0}, Ljava/lang/Object;-><init>()V
+
+    return-void
+.end method
+
+## CHECK-START: void Main2.testArraySimpleRemove() instruction_simplifier (before)
+## CHECK:         CheckCast
+
+## CHECK-START: void Main2.testArraySimpleRemove() instruction_simplifier (after)
+## CHECK-NOT:     CheckCast
+
+.method static testArraySimpleRemove()V
+    .registers 3
+
+    .prologue
+    .line 19
+    const/16 v2, 0xa
+
+    new-array v0, v2, [LSubclassA;
+
+    .local v0, "b":[LSuper;
+    move-object v1, v0
+
+    .line 20
+    check-cast v1, [LSubclassA;
+
+    .line 21
+    .local v1, "c":[LSubclassA;
+    return-void
+.end method
diff --git a/test/450-checker-types/src/Main.java b/test/450-checker-types/src/Main.java
index ae0fdbe..f6561cd 100644
--- a/test/450-checker-types/src/Main.java
+++ b/test/450-checker-types/src/Main.java
@@ -463,16 +463,6 @@
 
   public SubclassA $noinline$getSubclass() { throw new RuntimeException(); }
 
-  /// CHECK-START: void Main.testArraySimpleRemove() instruction_simplifier (before)
-  /// CHECK:         CheckCast
-
-  /// CHECK-START: void Main.testArraySimpleRemove() instruction_simplifier (after)
-  /// CHECK-NOT:     CheckCast
-  public void testArraySimpleRemove() {
-    Super[] b = new SubclassA[10];
-    SubclassA[] c = (SubclassA[])b;
-  }
-
   /// CHECK-START: void Main.testInvokeSimpleRemove() instruction_simplifier (before)
   /// CHECK:         CheckCast
 
diff --git a/test/530-checker-lse/src/Main.java b/test/530-checker-lse/src/Main.java
index ebde3bf..93c1538 100644
--- a/test/530-checker-lse/src/Main.java
+++ b/test/530-checker-lse/src/Main.java
@@ -1137,6 +1137,126 @@
 
   static Object[] sArray;
 
+  /// CHECK-START: int Main.testLocalArrayMerge1(boolean) load_store_elimination (before)
+  /// CHECK-DAG: <<Const0:i\d+>> IntConstant 0
+  /// CHECK-DAG: <<Const1:i\d+>> IntConstant 1
+  /// CHECK-DAG: <<A:l\d+>>      NewArray
+  /// CHECK-DAG:                 ArraySet [<<A>>,<<Const0>>,<<Const0>>]
+  /// CHECK-DAG:                 ArraySet [<<A>>,<<Const0>>,<<Const1>>]
+  /// CHECK-DAG:                 ArraySet [<<A>>,<<Const0>>,<<Const1>>]
+  /// CHECK-DAG: <<Get:i\d+>>    ArrayGet [<<A>>,<<Const0>>]
+  /// CHECK-DAG:                 Return [<<Get>>]
+  //
+  /// CHECK-START: int Main.testLocalArrayMerge1(boolean) load_store_elimination (after)
+  /// CHECK-DAG: <<Const1:i\d+>> IntConstant 1
+  /// CHECK-DAG:                 Return [<<Const1>>]
+  //
+  /// CHECK-START: int Main.testLocalArrayMerge1(boolean) load_store_elimination (after)
+  /// CHECK-NOT:                 NewArray
+  /// CHECK-NOT:                 ArraySet
+  /// CHECK-NOT:                 ArrayGet
+  private static int testLocalArrayMerge1(boolean x) {
+    // The explicit store can be removed right away
+    // since it is equivalent to the default.
+    int[] a = { 0 };
+    // The diamond pattern stores/load can be replaced
+    // by the direct value.
+    if (x) {
+      a[0] = 1;
+    } else {
+      a[0] = 1;
+    }
+    return a[0];
+  }
+
+  /// CHECK-START: int Main.testLocalArrayMerge2(boolean) load_store_elimination (before)
+  /// CHECK-DAG: <<Const0:i\d+>> IntConstant 0
+  /// CHECK-DAG: <<Const1:i\d+>> IntConstant 1
+  /// CHECK-DAG: <<Const2:i\d+>> IntConstant 2
+  /// CHECK-DAG: <<Const3:i\d+>> IntConstant 3
+  /// CHECK-DAG: <<A:l\d+>>      NewArray
+  /// CHECK-DAG:                 ArraySet [<<A>>,<<Const0>>,<<Const1>>]
+  /// CHECK-DAG:                 ArraySet [<<A>>,<<Const0>>,<<Const2>>]
+  /// CHECK-DAG:                 ArraySet [<<A>>,<<Const0>>,<<Const3>>]
+  /// CHECK-DAG: <<Get:i\d+>>    ArrayGet [<<A>>,<<Const0>>]
+  /// CHECK-DAG:                 Return [<<Get>>]
+  //
+  /// CHECK-START: int Main.testLocalArrayMerge2(boolean) load_store_elimination (after)
+  /// CHECK-DAG: <<Const0:i\d+>> IntConstant 0
+  /// CHECK-DAG: <<A:l\d+>>      NewArray
+  /// CHECK-DAG: <<Get:i\d+>>    ArrayGet [<<A>>,<<Const0>>]
+  /// CHECK-DAG:                 Return [<<Get>>]
+  //
+  /// CHECK-START: int Main.testLocalArrayMerge2(boolean) load_store_elimination (after)
+  /// CHECK-DAG:                 ArraySet
+  /// CHECK-DAG:                 ArraySet
+  /// CHECK-NOT:                 ArraySet
+  private static int testLocalArrayMerge2(boolean x) {
+    // The explicit store can be removed eventually even
+    // though it is not equivalent to the default.
+    int[] a = { 1 };
+    // The diamond pattern stores/load remain.
+    if (x) {
+      a[0] = 2;
+    } else {
+      a[0] = 3;
+    }
+    return a[0];
+  }
+
+  /// CHECK-START: int Main.testLocalArrayMerge3(boolean) load_store_elimination (after)
+  /// CHECK-DAG: <<Const0:i\d+>> IntConstant 0
+  /// CHECK-DAG: <<Const1:i\d+>> IntConstant 1
+  /// CHECK-DAG: <<Const2:i\d+>> IntConstant 2
+  /// CHECK-DAG: <<A:l\d+>>      NewArray
+  /// CHECK-DAG:                 ArraySet [<<A>>,<<Const0>>,<<Const1>>]
+  /// CHECK-DAG:                 ArraySet [<<A>>,<<Const0>>,<<Const2>>]
+  /// CHECK-DAG: <<Get:i\d+>>    ArrayGet [<<A>>,<<Const0>>]
+  /// CHECK-DAG:                 Return [<<Get>>]
+  private static int testLocalArrayMerge3(boolean x) {
+    // All stores/load remain.
+    int[] a = { 1 };
+    if (x) {
+      a[0] = 2;
+    }
+    return a[0];
+  }
+
+  /// CHECK-START: int Main.testLocalArrayMerge4(boolean) load_store_elimination (before)
+  /// CHECK-DAG: <<Const0:i\d+>> IntConstant 0
+  /// CHECK-DAG: <<Const1:i\d+>> IntConstant 1
+  /// CHECK-DAG: <<A:l\d+>>      NewArray
+  /// CHECK-DAG:                 ArraySet [<<A>>,<<Const0>>,<<Const0>>]
+  /// CHECK-DAG:                 ArraySet [<<A>>,<<Const0>>,<<Const1>>]
+  /// CHECK-DAG:                 ArraySet [<<A>>,<<Const0>>,<<Const1>>]
+  /// CHECK-DAG: <<Get1:b\d+>>   ArrayGet [<<A>>,<<Const0>>]
+  /// CHECK-DAG: <<Get2:a\d+>>   ArrayGet [<<A>>,<<Const0>>]
+  /// CHECK-DAG: <<Add:i\d+>>    Add [<<Get1>>,<<Get2>>]
+  /// CHECK-DAG:                 Return [<<Add>>]
+  //
+  /// CHECK-START: int Main.testLocalArrayMerge4(boolean) load_store_elimination (after)
+  /// CHECK-DAG: <<Const1:i\d+>> IntConstant 1
+  /// CHECK-DAG: <<Cnv1:b\d+>>   TypeConversion [<<Const1>>]
+  /// CHECK-DAG: <<Cnv2:a\d+>>   TypeConversion [<<Const1>>]
+  /// CHECK-DAG: <<Add:i\d+>>    Add [<<Cnv1>>,<<Cnv2>>]
+  /// CHECK-DAG:                 Return [<<Add>>]
+  //
+  /// CHECK-START: int Main.testLocalArrayMerge4(boolean) load_store_elimination (after)
+  /// CHECK-NOT:                 NewArray
+  /// CHECK-NOT:                 ArraySet
+  /// CHECK-NOT:                 ArrayGet
+  private static int testLocalArrayMerge4(boolean x) {
+    byte[] a = { 0 };
+    if (x) {
+      a[0] = 1;
+    } else {
+      a[0] = 1;
+    }
+    // Differently typed (signed vs unsigned),
+    // but same reference.
+    return a[0] + (a[0] & 0xff);
+  }
+
   static void assertIntEquals(int result, int expected) {
     if (expected != result) {
       throw new Error("Expected: " + expected + ", found: " + result);
@@ -1271,6 +1391,15 @@
     assertIntEquals(testclass2.i, 55);
 
     assertIntEquals(testStoreStoreWithDeoptimize(new int[4]), 4);
+
+    assertIntEquals(testLocalArrayMerge1(true), 1);
+    assertIntEquals(testLocalArrayMerge1(false), 1);
+    assertIntEquals(testLocalArrayMerge2(true), 2);
+    assertIntEquals(testLocalArrayMerge2(false), 3);
+    assertIntEquals(testLocalArrayMerge3(true), 2);
+    assertIntEquals(testLocalArrayMerge3(false), 1);
+    assertIntEquals(testLocalArrayMerge4(true), 2);
+    assertIntEquals(testLocalArrayMerge4(false), 2);
   }
 
   static boolean sFlag;
diff --git a/test/566-polymorphic-inlining/polymorphic_inline.cc b/test/566-polymorphic-inlining/polymorphic_inline.cc
index e2b8aa0..7c1507f 100644
--- a/test/566-polymorphic-inlining/polymorphic_inline.cc
+++ b/test/566-polymorphic-inlining/polymorphic_inline.cc
@@ -48,9 +48,8 @@
     }
   }
 
-  CodeInfo info = header->GetOptimizedCodeInfo();
-  CodeInfoEncoding encoding = info.ExtractEncoding();
-  CHECK(info.HasInlineInfo(encoding));
+  CodeInfo info(header);
+  CHECK(info.HasInlineInfo());
 }
 
 static void allocate_profiling_info(jclass cls, const char* method_name) {
diff --git a/test/knownfailures.json b/test/knownfailures.json
index 7d2cae8..493582f 100644
--- a/test/knownfailures.json
+++ b/test/knownfailures.json
@@ -651,12 +651,6 @@
         "description": ["Requires zip, which isn't available on device"]
     },
     {
-        "tests": "712-varhandle-invocations",
-        "variant": "speed-profile & debug & gcstress & target",
-        "bug": "b/73275005",
-        "description": ["Time out"]
-    },
-    {
         "tests": ["1941-dispose-stress", "522-checker-regression-monitor-exit"],
         "variant": "jvm",
         "bug": "b/73888836",
diff --git a/tools/dexanalyze/dexanalyze_experiments.cc b/tools/dexanalyze/dexanalyze_experiments.cc
index adc5154..f9bf45d 100644
--- a/tools/dexanalyze/dexanalyze_experiments.cc
+++ b/tools/dexanalyze/dexanalyze_experiments.cc
@@ -23,6 +23,7 @@
 #include <vector>
 
 #include "android-base/stringprintf.h"
+#include "dex/class_accessor-inl.h"
 #include "dex/code_item_accessors-inl.h"
 #include "dex/dex_instruction-inl.h"
 #include "dex/standard_dex_file.h"
@@ -126,79 +127,73 @@
   num_class_defs_ += dex_file.NumClassDefs();
   for (size_t class_def_index = 0; class_def_index < dex_file.NumClassDefs(); ++class_def_index) {
     const DexFile::ClassDef& class_def = dex_file.GetClassDef(class_def_index);
-    const uint8_t* class_data = dex_file.GetClassData(class_def);
-    if (class_data == nullptr) {
-      continue;
-    }
-    ClassDataItemIterator it(dex_file, class_data);
-    it.SkipAllFields();
+    ClassAccessor accessor(dex_file, class_def);
     std::set<size_t> unique_method_ids;
     std::set<size_t> unique_string_ids;
-    while (it.HasNextMethod()) {
-      const DexFile::CodeItem* code_item = it.GetMethodCodeItem();
-      if (code_item != nullptr) {
-        CodeItemInstructionAccessor instructions(dex_file, code_item);
-        const uint16_t* code_ptr = instructions.Insns();
-        dex_code_bytes_ += instructions.InsnsSizeInCodeUnits() * sizeof(code_ptr[0]);
-        for (const DexInstructionPcPair& inst : instructions) {
-          switch (inst->Opcode()) {
-            case Instruction::CONST_STRING: {
-              const dex::StringIndex string_index(inst->VRegB_21c());
-              unique_string_ids.insert(string_index.index_);
-              ++num_string_ids_from_code_;
-              break;
-            }
-            case Instruction::CONST_STRING_JUMBO: {
-              const dex::StringIndex string_index(inst->VRegB_31c());
-              unique_string_ids.insert(string_index.index_);
-              ++num_string_ids_from_code_;
-              break;
-            }
-            // Invoke cases.
-            case Instruction::INVOKE_VIRTUAL:
-            case Instruction::INVOKE_VIRTUAL_RANGE: {
-              bool is_range = (inst->Opcode() == Instruction::INVOKE_VIRTUAL_RANGE);
-              uint32_t method_idx = is_range ? inst->VRegB_3rc() : inst->VRegB_35c();
-              if (dex_file.GetMethodId(method_idx).class_idx_ == class_def.class_idx_) {
-                ++same_class_virtual_;
-              } else {
-                ++other_class_virtual_;
-                unique_method_ids.insert(method_idx);
-              }
-              break;
-            }
-            case Instruction::INVOKE_DIRECT:
-            case Instruction::INVOKE_DIRECT_RANGE: {
-              bool is_range = (inst->Opcode() == Instruction::INVOKE_DIRECT_RANGE);
-              uint32_t method_idx = (is_range) ? inst->VRegB_3rc() : inst->VRegB_35c();
-              if (dex_file.GetMethodId(method_idx).class_idx_ == class_def.class_idx_) {
-                ++same_class_direct_;
-              } else {
-                ++other_class_direct_;
-                unique_method_ids.insert(method_idx);
-              }
-              break;
-            }
-            case Instruction::INVOKE_STATIC:
-            case Instruction::INVOKE_STATIC_RANGE: {
-              bool is_range = (inst->Opcode() == Instruction::INVOKE_STATIC_RANGE);
-              uint32_t method_idx = (is_range) ? inst->VRegB_3rc() : inst->VRegB_35c();
-              if (dex_file.GetMethodId(method_idx).class_idx_ == class_def.class_idx_) {
-                ++same_class_static_;
-              } else {
-                ++other_class_static_;
-                unique_method_ids.insert(method_idx);
-              }
-              break;
-            }
-            default:
-              break;
+    accessor.VisitMethods([&](const ClassAccessor::Method& method) {
+      const DexFile::CodeItem* code_item = accessor.GetCodeItem(method);
+      if (code_item == nullptr) {
+        return;
+      }
+      CodeItemInstructionAccessor instructions(dex_file, code_item);
+      const uint16_t* code_ptr = instructions.Insns();
+      dex_code_bytes_ += instructions.InsnsSizeInCodeUnits() * sizeof(code_ptr[0]);
+      for (const DexInstructionPcPair& inst : instructions) {
+        switch (inst->Opcode()) {
+          case Instruction::CONST_STRING: {
+            const dex::StringIndex string_index(inst->VRegB_21c());
+            unique_string_ids.insert(string_index.index_);
+            ++num_string_ids_from_code_;
+            break;
           }
+          case Instruction::CONST_STRING_JUMBO: {
+            const dex::StringIndex string_index(inst->VRegB_31c());
+            unique_string_ids.insert(string_index.index_);
+            ++num_string_ids_from_code_;
+            break;
+          }
+          // Invoke cases.
+          case Instruction::INVOKE_VIRTUAL:
+          case Instruction::INVOKE_VIRTUAL_RANGE: {
+            bool is_range = (inst->Opcode() == Instruction::INVOKE_VIRTUAL_RANGE);
+            uint32_t method_idx = is_range ? inst->VRegB_3rc() : inst->VRegB_35c();
+            if (dex_file.GetMethodId(method_idx).class_idx_ == class_def.class_idx_) {
+              ++same_class_virtual_;
+            } else {
+              ++other_class_virtual_;
+              unique_method_ids.insert(method_idx);
+            }
+            break;
+          }
+          case Instruction::INVOKE_DIRECT:
+          case Instruction::INVOKE_DIRECT_RANGE: {
+            bool is_range = (inst->Opcode() == Instruction::INVOKE_DIRECT_RANGE);
+            uint32_t method_idx = (is_range) ? inst->VRegB_3rc() : inst->VRegB_35c();
+            if (dex_file.GetMethodId(method_idx).class_idx_ == class_def.class_idx_) {
+              ++same_class_direct_;
+            } else {
+              ++other_class_direct_;
+              unique_method_ids.insert(method_idx);
+            }
+            break;
+          }
+          case Instruction::INVOKE_STATIC:
+          case Instruction::INVOKE_STATIC_RANGE: {
+            bool is_range = (inst->Opcode() == Instruction::INVOKE_STATIC_RANGE);
+            uint32_t method_idx = (is_range) ? inst->VRegB_3rc() : inst->VRegB_35c();
+            if (dex_file.GetMethodId(method_idx).class_idx_ == class_def.class_idx_) {
+              ++same_class_static_;
+            } else {
+              ++other_class_static_;
+              unique_method_ids.insert(method_idx);
+            }
+            break;
+          }
+          default:
+            break;
         }
       }
-      it.Next();
-    }
-    DCHECK(!it.HasNext());
+    });
     total_unique_method_idx_ += unique_method_ids.size();
     total_unique_string_ids_ += unique_string_ids.size();
   }
diff --git a/tools/run-jdwp-tests.sh b/tools/run-jdwp-tests.sh
index d376cad..eebc092 100755
--- a/tools/run-jdwp-tests.sh
+++ b/tools/run-jdwp-tests.sh
@@ -360,7 +360,9 @@
 if [[ $mode == "host" ]]; then
   pkill -9 -f /bin/dalvikvm
 else
-  adb shell pkill -9 -f /bin/dalvikvm
+  # Tests may run on older Android versions where pkill requires "-l SIGNAL"
+  # rather than "-SIGNAL".
+  adb shell pkill -l 9 -f /bin/dalvikvm
 fi
 echo "Done."