Revert^5 "Hash-based dex cache type array."

For app images, ImageWriter does not add boot image
classes to the app image class table even though it
keeps them in the dex caches. The reason for that is
unknown, the code looks OK.

Bug: 34839984
Bug: 30627598
Bug: 34659969

Also reverts "Improve debugging output for a crash."

This reverts commits
    bfb80d25eaeb7a604d5dd25a370e3869e96a33ab,
    8dd56fcb3196f466ecaffd445397cb11ef85f89f.

Test: testrunner.py --host
Change-Id: Ic8db128207c07588c7f11563208ae1e85c8b0e84
diff --git a/compiler/optimizing/builder.h b/compiler/optimizing/builder.h
index 3a4c9db..e4ad422 100644
--- a/compiler/optimizing/builder.h
+++ b/compiler/optimizing/builder.h
@@ -54,10 +54,7 @@
         compiler_driver_(driver),
         compilation_stats_(compiler_stats),
         block_builder_(graph, dex_file, code_item),
-        ssa_builder_(graph,
-                     dex_compilation_unit->GetClassLoader(),
-                     dex_compilation_unit->GetDexCache(),
-                     handles),
+        ssa_builder_(graph, dex_compilation_unit->GetDexCache(), handles),
         instruction_builder_(graph,
                              &block_builder_,
                              &ssa_builder_,
@@ -83,12 +80,10 @@
         code_item_(code_item),
         dex_compilation_unit_(nullptr),
         compiler_driver_(nullptr),
+        null_dex_cache_(),
         compilation_stats_(nullptr),
         block_builder_(graph, nullptr, code_item),
-        ssa_builder_(graph,
-                     handles->NewHandle<mirror::ClassLoader>(nullptr),
-                     handles->NewHandle<mirror::DexCache>(nullptr),
-                     handles),
+        ssa_builder_(graph, null_dex_cache_, handles),
         instruction_builder_(graph,
                              &block_builder_,
                              &ssa_builder_,
@@ -101,7 +96,7 @@
                              /* code_generator */ nullptr,
                              /* interpreter_metadata */ nullptr,
                              /* compiler_stats */ nullptr,
-                             handles->NewHandle<mirror::DexCache>(nullptr),
+                             null_dex_cache_,
                              handles) {}
 
   GraphAnalysisResult BuildGraph();
@@ -122,6 +117,8 @@
 
   CompilerDriver* const compiler_driver_;
 
+  ScopedNullHandle<mirror::DexCache> null_dex_cache_;
+
   OptimizingCompilerStats* compilation_stats_;
 
   HBasicBlockBuilder block_builder_;
diff --git a/compiler/optimizing/inliner.cc b/compiler/optimizing/inliner.cc
index 664b95a..2e45149 100644
--- a/compiler/optimizing/inliner.cc
+++ b/compiler/optimizing/inliner.cc
@@ -192,9 +192,9 @@
 }
 
 static dex::TypeIndex FindClassIndexIn(mirror::Class* cls,
-                                       const DexCompilationUnit& compilation_unit)
+                                       const DexFile& dex_file,
+                                       Handle<mirror::DexCache> dex_cache)
     REQUIRES_SHARED(Locks::mutator_lock_) {
-  const DexFile& dex_file = *compilation_unit.GetDexFile();
   dex::TypeIndex index;
   if (cls->GetDexCache() == nullptr) {
     DCHECK(cls->IsArrayClass()) << cls->PrettyClass();
@@ -203,19 +203,22 @@
     DCHECK(cls->IsProxyClass()) << cls->PrettyClass();
     // TODO: deal with proxy classes.
   } else if (IsSameDexFile(cls->GetDexFile(), dex_file)) {
-    DCHECK_EQ(cls->GetDexCache(), compilation_unit.GetDexCache().Get());
+    DCHECK_EQ(cls->GetDexCache(), dex_cache.Get());
     index = cls->GetDexTypeIndex();
+    // Update the dex cache to ensure the class is in. The generated code will
+    // consider it is. We make it safe by updating the dex cache, as other
+    // dex files might also load the class, and there is no guarantee the dex
+    // cache of the dex file of the class will be updated.
+    if (dex_cache->GetResolvedType(index) == nullptr) {
+      dex_cache->SetResolvedType(index, cls);
+    }
   } else {
     index = cls->FindTypeIndexInOtherDexFile(dex_file);
-    // We cannot guarantee the entry will resolve to the same class,
+    // We cannot guarantee the entry in the dex cache will resolve to the same class,
     // as there may be different class loaders. So only return the index if it's
-    // the right class already resolved with the class loader.
-    if (index.IsValid()) {
-      ObjPtr<mirror::Class> resolved = ClassLinker::LookupResolvedType(
-          index, compilation_unit.GetDexCache().Get(), compilation_unit.GetClassLoader().Get());
-      if (resolved != cls) {
-        index = dex::TypeIndex::Invalid();
-      }
+    // the right class in the dex cache already.
+    if (index.IsValid() && dex_cache->GetResolvedType(index) != cls) {
+      index = dex::TypeIndex::Invalid();
     }
   }
 
@@ -533,10 +536,7 @@
     ObjPtr<mirror::DexCache> dex_cache =
         dex_profile_index_to_dex_cache[class_ref.dex_profile_index];
     DCHECK(dex_cache != nullptr);
-    ObjPtr<mirror::Class> clazz = ClassLinker::LookupResolvedType(
-          class_ref.type_index,
-          dex_cache,
-          caller_compilation_unit_.GetClassLoader().Get());
+    ObjPtr<mirror::Class> clazz = dex_cache->GetResolvedType(class_ref.type_index);
     if (clazz != nullptr) {
       inline_cache->Set(ic_index++, clazz);
     } else {
@@ -577,8 +577,9 @@
   DCHECK(invoke_instruction->IsInvokeVirtual() || invoke_instruction->IsInvokeInterface())
       << invoke_instruction->DebugName();
 
+  const DexFile& caller_dex_file = *caller_compilation_unit_.GetDexFile();
   dex::TypeIndex class_index = FindClassIndexIn(
-      GetMonomorphicType(classes), caller_compilation_unit_);
+      GetMonomorphicType(classes), caller_dex_file, caller_compilation_unit_.GetDexCache());
   if (!class_index.IsValid()) {
     VLOG(compiler) << "Call to " << ArtMethod::PrettyMethod(resolved_method)
                    << " from inline cache is not inlined because its class is not"
@@ -621,7 +622,6 @@
   // Run type propagation to get the guard typed, and eventually propagate the
   // type of the receiver.
   ReferenceTypePropagation rtp_fixup(graph_,
-                                     outer_compilation_unit_.GetClassLoader(),
                                      outer_compilation_unit_.GetDexCache(),
                                      handles_,
                                      /* is_first_run */ false);
@@ -722,6 +722,7 @@
 
   ClassLinker* class_linker = caller_compilation_unit_.GetClassLinker();
   PointerSize pointer_size = class_linker->GetImagePointerSize();
+  const DexFile& caller_dex_file = *caller_compilation_unit_.GetDexFile();
 
   bool all_targets_inlined = true;
   bool one_target_inlined = false;
@@ -743,7 +744,8 @@
     HInstruction* cursor = invoke_instruction->GetPrevious();
     HBasicBlock* bb_cursor = invoke_instruction->GetBlock();
 
-    dex::TypeIndex class_index = FindClassIndexIn(handle.Get(), caller_compilation_unit_);
+    dex::TypeIndex class_index = FindClassIndexIn(
+        handle.Get(), caller_dex_file, caller_compilation_unit_.GetDexCache());
     HInstruction* return_replacement = nullptr;
     if (!class_index.IsValid() ||
         !TryBuildAndInline(invoke_instruction,
@@ -799,7 +801,6 @@
 
   // Run type propagation to get the guards typed.
   ReferenceTypePropagation rtp_fixup(graph_,
-                                     outer_compilation_unit_.GetClassLoader(),
                                      outer_compilation_unit_.GetDexCache(),
                                      handles_,
                                      /* is_first_run */ false);
@@ -996,7 +997,6 @@
 
   // Run type propagation to get the guard typed.
   ReferenceTypePropagation rtp_fixup(graph_,
-                                     outer_compilation_unit_.GetClassLoader(),
                                      outer_compilation_unit_.GetDexCache(),
                                      handles_,
                                      /* is_first_run */ false);
@@ -1065,7 +1065,6 @@
     // Actual return value has a more specific type than the method's declared
     // return type. Run RTP again on the outer graph to propagate it.
     ReferenceTypePropagation(graph_,
-                             outer_compilation_unit_.GetClassLoader(),
                              outer_compilation_unit_.GetDexCache(),
                              handles_,
                              /* is_first_run */ false).Run();
@@ -1318,11 +1317,7 @@
       /* dex_pc */ 0);
   if (iget->GetType() == Primitive::kPrimNot) {
     // Use the same dex_cache that we used for field lookup as the hint_dex_cache.
-    ReferenceTypePropagation rtp(graph_,
-                                 outer_compilation_unit_.GetClassLoader(),
-                                 dex_cache,
-                                 handles_,
-                                 /* is_first_run */ false);
+    ReferenceTypePropagation rtp(graph_, dex_cache, handles_, /* is_first_run */ false);
     rtp.Visit(iget);
   }
   return iget;
@@ -1368,7 +1363,7 @@
       resolved_method->GetDeclaringClass()->GetClassLoader()));
 
   DexCompilationUnit dex_compilation_unit(
-      class_loader,
+      class_loader.ToJObject(),
       class_linker,
       callee_dex_file,
       code_item,
@@ -1492,7 +1487,6 @@
   // are more specific than the declared ones, run RTP again on the inner graph.
   if (run_rtp || ArgumentTypesMoreSpecific(invoke_instruction, resolved_method)) {
     ReferenceTypePropagation(callee_graph,
-                             outer_compilation_unit_.GetClassLoader(),
                              dex_compilation_unit.GetDexCache(),
                              handles_,
                              /* is_first_run */ false).Run();
diff --git a/compiler/optimizing/instruction_builder.cc b/compiler/optimizing/instruction_builder.cc
index 88f67fa..1053da4 100644
--- a/compiler/optimizing/instruction_builder.cc
+++ b/compiler/optimizing/instruction_builder.cc
@@ -677,10 +677,11 @@
 
 ArtMethod* HInstructionBuilder::ResolveMethod(uint16_t method_idx, InvokeType invoke_type) {
   ScopedObjectAccess soa(Thread::Current());
-  StackHandleScope<2> hs(soa.Self());
+  StackHandleScope<3> hs(soa.Self());
 
   ClassLinker* class_linker = dex_compilation_unit_->GetClassLinker();
-  Handle<mirror::ClassLoader> class_loader = dex_compilation_unit_->GetClassLoader();
+  Handle<mirror::ClassLoader> class_loader(hs.NewHandle(
+      soa.Decode<mirror::ClassLoader>(dex_compilation_unit_->GetClassLoader())));
   Handle<mirror::Class> compiling_class(hs.NewHandle(GetCompilingClass()));
   // We fetch the referenced class eagerly (that is, the class pointed by in the MethodId
   // at method_idx), as `CanAccessResolvedMethod` expects it be be in the dex cache.
@@ -1267,7 +1268,9 @@
 static mirror::Class* GetClassFrom(CompilerDriver* driver,
                                    const DexCompilationUnit& compilation_unit) {
   ScopedObjectAccess soa(Thread::Current());
-  Handle<mirror::ClassLoader> class_loader = compilation_unit.GetClassLoader();
+  StackHandleScope<1> hs(soa.Self());
+  Handle<mirror::ClassLoader> class_loader(hs.NewHandle(
+      soa.Decode<mirror::ClassLoader>(compilation_unit.GetClassLoader())));
   Handle<mirror::DexCache> dex_cache = compilation_unit.GetDexCache();
 
   return driver->ResolveCompilingMethodsClass(soa, dex_cache, class_loader, &compilation_unit);
@@ -1283,9 +1286,10 @@
 
 bool HInstructionBuilder::IsOutermostCompilingClass(dex::TypeIndex type_index) const {
   ScopedObjectAccess soa(Thread::Current());
-  StackHandleScope<2> hs(soa.Self());
+  StackHandleScope<3> hs(soa.Self());
   Handle<mirror::DexCache> dex_cache = dex_compilation_unit_->GetDexCache();
-  Handle<mirror::ClassLoader> class_loader = dex_compilation_unit_->GetClassLoader();
+  Handle<mirror::ClassLoader> class_loader(hs.NewHandle(
+      soa.Decode<mirror::ClassLoader>(dex_compilation_unit_->GetClassLoader())));
   Handle<mirror::Class> cls(hs.NewHandle(compiler_driver_->ResolveClass(
       soa, dex_cache, class_loader, type_index, dex_compilation_unit_)));
   Handle<mirror::Class> outer_class(hs.NewHandle(GetOutermostCompilingClass()));
@@ -1321,7 +1325,8 @@
   StackHandleScope<2> hs(soa.Self());
 
   ClassLinker* class_linker = dex_compilation_unit_->GetClassLinker();
-  Handle<mirror::ClassLoader> class_loader = dex_compilation_unit_->GetClassLoader();
+  Handle<mirror::ClassLoader> class_loader(hs.NewHandle(
+      soa.Decode<mirror::ClassLoader>(dex_compilation_unit_->GetClassLoader())));
   Handle<mirror::Class> compiling_class(hs.NewHandle(GetCompilingClass()));
 
   ArtField* resolved_field = class_linker->ResolveField(*dex_compilation_unit_->GetDexFile(),
@@ -1638,8 +1643,10 @@
 
 HLoadClass* HInstructionBuilder::BuildLoadClass(dex::TypeIndex type_index, uint32_t dex_pc) {
   ScopedObjectAccess soa(Thread::Current());
+  StackHandleScope<2> hs(soa.Self());
   const DexFile& dex_file = *dex_compilation_unit_->GetDexFile();
-  Handle<mirror::ClassLoader> class_loader = dex_compilation_unit_->GetClassLoader();
+  Handle<mirror::ClassLoader> class_loader(hs.NewHandle(
+      soa.Decode<mirror::ClassLoader>(dex_compilation_unit_->GetClassLoader())));
   Handle<mirror::Class> klass = handles_->NewHandle(compiler_driver_->ResolveClass(
       soa, dex_compilation_unit_->GetDexCache(), class_loader, type_index, dex_compilation_unit_));
 
@@ -1723,9 +1730,17 @@
   }
 }
 
-bool HInstructionBuilder::NeedsAccessCheck(dex::TypeIndex type_index, bool* finalizable) const {
+bool HInstructionBuilder::NeedsAccessCheck(dex::TypeIndex type_index,
+                                           Handle<mirror::DexCache> dex_cache,
+                                           bool* finalizable) const {
   return !compiler_driver_->CanAccessInstantiableTypeWithoutChecks(
-      LookupReferrerClass(), LookupResolvedType(type_index, *dex_compilation_unit_), finalizable);
+      dex_compilation_unit_->GetDexMethodIndex(), dex_cache, type_index, finalizable);
+}
+
+bool HInstructionBuilder::NeedsAccessCheck(dex::TypeIndex type_index, bool* finalizable) const {
+  ScopedObjectAccess soa(Thread::Current());
+  Handle<mirror::DexCache> dex_cache = dex_compilation_unit_->GetDexCache();
+  return NeedsAccessCheck(type_index, dex_cache, finalizable);
 }
 
 bool HInstructionBuilder::CanDecodeQuickenedInfo() const {
@@ -2765,18 +2780,4 @@
   return true;
 }  // NOLINT(readability/fn_size)
 
-ObjPtr<mirror::Class> HInstructionBuilder::LookupResolvedType(
-    dex::TypeIndex type_index,
-    const DexCompilationUnit& compilation_unit) const {
-  return ClassLinker::LookupResolvedType(
-        type_index, compilation_unit.GetDexCache().Get(), compilation_unit.GetClassLoader().Get());
-}
-
-ObjPtr<mirror::Class> HInstructionBuilder::LookupReferrerClass() const {
-  // TODO: Cache the result in a Handle<mirror::Class>.
-  const DexFile::MethodId& method_id =
-      dex_compilation_unit_->GetDexFile()->GetMethodId(dex_compilation_unit_->GetDexMethodIndex());
-  return LookupResolvedType(method_id.class_idx_, *dex_compilation_unit_);
-}
-
 }  // namespace art
diff --git a/compiler/optimizing/instruction_builder.h b/compiler/optimizing/instruction_builder.h
index 7fdc188..6cb6655 100644
--- a/compiler/optimizing/instruction_builder.h
+++ b/compiler/optimizing/instruction_builder.h
@@ -110,8 +110,11 @@
 
   // Returns whether the current method needs access check for the type.
   // Output parameter finalizable is set to whether the type is finalizable.
-  bool NeedsAccessCheck(dex::TypeIndex type_index, /*out*/bool* finalizable) const
+  bool NeedsAccessCheck(dex::TypeIndex type_index,
+                        Handle<mirror::DexCache> dex_cache,
+                        /*out*/bool* finalizable) const
       REQUIRES_SHARED(Locks::mutator_lock_);
+  bool NeedsAccessCheck(dex::TypeIndex type_index, /*out*/bool* finalizable) const;
 
   template<typename T>
   void Unop_12x(const Instruction& instruction, Primitive::Type type, uint32_t dex_pc);
@@ -301,12 +304,6 @@
   // be found.
   ArtField* ResolveField(uint16_t field_idx, bool is_static, bool is_put);
 
-  ObjPtr<mirror::Class> LookupResolvedType(dex::TypeIndex type_index,
-                                           const DexCompilationUnit& compilation_unit) const
-      REQUIRES_SHARED(Locks::mutator_lock_);
-
-  ObjPtr<mirror::Class> LookupReferrerClass() const REQUIRES_SHARED(Locks::mutator_lock_);
-
   ArenaAllocator* const arena_;
   HGraph* const graph_;
   VariableSizedHandleScope* handles_;
diff --git a/compiler/optimizing/optimizing_compiler.cc b/compiler/optimizing/optimizing_compiler.cc
index d6153b0..918a027 100644
--- a/compiler/optimizing/optimizing_compiler.cc
+++ b/compiler/optimizing/optimizing_compiler.cc
@@ -307,7 +307,7 @@
                           InvokeType invoke_type,
                           uint16_t class_def_idx,
                           uint32_t method_idx,
-                          Handle<mirror::ClassLoader> class_loader,
+                          jobject class_loader,
                           const DexFile& dex_file,
                           Handle<mirror::DexCache> dex_cache) const OVERRIDE;
 
@@ -376,7 +376,7 @@
                             InvokeType invoke_type,
                             uint16_t class_def_idx,
                             uint32_t method_idx,
-                            Handle<mirror::ClassLoader> class_loader,
+                            jobject class_loader,
                             const DexFile& dex_file,
                             Handle<mirror::DexCache> dex_cache,
                             ArtMethod* method,
@@ -884,7 +884,7 @@
                                               InvokeType invoke_type,
                                               uint16_t class_def_idx,
                                               uint32_t method_idx,
-                                              Handle<mirror::ClassLoader> class_loader,
+                                              jobject class_loader,
                                               const DexFile& dex_file,
                                               Handle<mirror::DexCache> dex_cache,
                                               ArtMethod* method,
@@ -955,8 +955,11 @@
   const uint8_t* interpreter_metadata = nullptr;
   if (method == nullptr) {
     ScopedObjectAccess soa(Thread::Current());
+    StackHandleScope<1> hs(soa.Self());
+    Handle<mirror::ClassLoader> loader(hs.NewHandle(
+        soa.Decode<mirror::ClassLoader>(class_loader)));
     method = compiler_driver->ResolveMethod(
-        soa, dex_cache, class_loader, &dex_compilation_unit, method_idx, invoke_type);
+        soa, dex_cache, loader, &dex_compilation_unit, method_idx, invoke_type);
   }
   // For AOT compilation, we may not get a method, for example if its class is erroneous.
   // JIT should always have a method.
@@ -965,6 +968,16 @@
     graph->SetArtMethod(method);
     ScopedObjectAccess soa(Thread::Current());
     interpreter_metadata = method->GetQuickenedInfo(class_linker->GetImagePointerSize());
+    dex::TypeIndex type_index = method->GetDeclaringClass()->GetDexTypeIndex();
+
+    // Update the dex cache if the type is not in it yet. Note that under AOT,
+    // the verifier must have set it, but under JIT, there's no guarantee, as we
+    // don't necessarily run the verifier.
+    // The compiler and the compiler driver assume the compiling class is
+    // in the dex cache.
+    if (dex_cache->GetResolvedType(type_index) == nullptr) {
+      dex_cache->SetResolvedType(type_index, method->GetDeclaringClass());
+    }
   }
 
   std::unique_ptr<CodeGenerator> codegen(
@@ -1045,7 +1058,7 @@
                                             InvokeType invoke_type,
                                             uint16_t class_def_idx,
                                             uint32_t method_idx,
-                                            Handle<mirror::ClassLoader> jclass_loader,
+                                            jobject jclass_loader,
                                             const DexFile& dex_file,
                                             Handle<mirror::DexCache> dex_cache) const {
   CompilerDriver* compiler_driver = GetCompilerDriver();
@@ -1159,6 +1172,7 @@
   Handle<mirror::DexCache> dex_cache(hs.NewHandle(method->GetDexCache()));
   DCHECK(method->IsCompilable());
 
+  jobject jclass_loader = class_loader.ToJObject();
   const DexFile* dex_file = method->GetDexFile();
   const uint16_t class_def_idx = method->GetClassDefIndex();
   const DexFile::CodeItem* code_item = dex_file->GetCodeItem(method->GetCodeItemOffset());
@@ -1182,7 +1196,7 @@
                    invoke_type,
                    class_def_idx,
                    method_idx,
-                   class_loader,
+                   jclass_loader,
                    *dex_file,
                    dex_cache,
                    method,
diff --git a/compiler/optimizing/reference_type_propagation.cc b/compiler/optimizing/reference_type_propagation.cc
index 6e332ca..c55fccc 100644
--- a/compiler/optimizing/reference_type_propagation.cc
+++ b/compiler/optimizing/reference_type_propagation.cc
@@ -65,13 +65,11 @@
 class ReferenceTypePropagation::RTPVisitor : public HGraphDelegateVisitor {
  public:
   RTPVisitor(HGraph* graph,
-             Handle<mirror::ClassLoader> class_loader,
              Handle<mirror::DexCache> hint_dex_cache,
              HandleCache* handle_cache,
              ArenaVector<HInstruction*>* worklist,
              bool is_first_run)
     : HGraphDelegateVisitor(graph),
-      class_loader_(class_loader),
       hint_dex_cache_(hint_dex_cache),
       handle_cache_(handle_cache),
       worklist_(worklist),
@@ -103,7 +101,6 @@
                                bool is_exact);
 
  private:
-  Handle<mirror::ClassLoader> class_loader_;
   Handle<mirror::DexCache> hint_dex_cache_;
   HandleCache* handle_cache_;
   ArenaVector<HInstruction*>* worklist_;
@@ -111,13 +108,11 @@
 };
 
 ReferenceTypePropagation::ReferenceTypePropagation(HGraph* graph,
-                                                   Handle<mirror::ClassLoader> class_loader,
                                                    Handle<mirror::DexCache> hint_dex_cache,
                                                    VariableSizedHandleScope* handles,
                                                    bool is_first_run,
                                                    const char* name)
     : HOptimization(graph, name),
-      class_loader_(class_loader),
       hint_dex_cache_(hint_dex_cache),
       handle_cache_(handles),
       worklist_(graph->GetArena()->Adapter(kArenaAllocReferenceTypePropagation)),
@@ -152,12 +147,7 @@
 }
 
 void ReferenceTypePropagation::Visit(HInstruction* instruction) {
-  RTPVisitor visitor(graph_,
-                     class_loader_,
-                     hint_dex_cache_,
-                     &handle_cache_,
-                     &worklist_,
-                     is_first_run_);
+  RTPVisitor visitor(graph_, hint_dex_cache_, &handle_cache_, &worklist_, is_first_run_);
   instruction->Accept(&visitor);
 }
 
@@ -331,12 +321,7 @@
 }
 
 void ReferenceTypePropagation::VisitBasicBlock(HBasicBlock* block) {
-  RTPVisitor visitor(graph_,
-                     class_loader_,
-                     hint_dex_cache_,
-                     &handle_cache_,
-                     &worklist_,
-                     is_first_run_);
+  RTPVisitor visitor(graph_, hint_dex_cache_, &handle_cache_, &worklist_, is_first_run_);
   // Handle Phis first as there might be instructions in the same block who depend on them.
   for (HInstructionIterator it(block->GetPhis()); !it.Done(); it.Advance()) {
     VisitPhi(it.Current()->AsPhi());
@@ -557,9 +542,8 @@
 
   ScopedObjectAccess soa(Thread::Current());
   ObjPtr<mirror::DexCache> dex_cache = FindDexCacheWithHint(soa.Self(), dex_file, hint_dex_cache_);
-  ObjPtr<mirror::Class> klass =
-      ClassLinker::LookupResolvedType(type_idx, dex_cache, class_loader_.Get());
-  SetClassAsTypeInfo(instr, klass, is_exact);
+  // Get type from dex cache assuming it was populated by the verifier.
+  SetClassAsTypeInfo(instr, dex_cache->GetResolvedType(type_idx), is_exact);
 }
 
 void ReferenceTypePropagation::RTPVisitor::VisitNewInstance(HNewInstance* instr) {
@@ -572,13 +556,25 @@
   SetClassAsTypeInfo(instr, instr->GetLoadClass()->GetClass().Get(), /* is_exact */ true);
 }
 
+static mirror::Class* GetClassFromDexCache(Thread* self,
+                                           const DexFile& dex_file,
+                                           dex::TypeIndex type_idx,
+                                           Handle<mirror::DexCache> hint_dex_cache)
+    REQUIRES_SHARED(Locks::mutator_lock_) {
+  ObjPtr<mirror::DexCache> dex_cache = FindDexCacheWithHint(self, dex_file, hint_dex_cache);
+  // Get type from dex cache assuming it was populated by the verifier.
+  return dex_cache->GetResolvedType(type_idx);
+}
+
 void ReferenceTypePropagation::RTPVisitor::VisitParameterValue(HParameterValue* instr) {
   // We check if the existing type is valid: the inliner may have set it.
   if (instr->GetType() == Primitive::kPrimNot && !instr->GetReferenceTypeInfo().IsValid()) {
-    UpdateReferenceTypeInfo(instr,
-                            instr->GetTypeIndex(),
-                            instr->GetDexFile(),
-                            /* is_exact */ false);
+    ScopedObjectAccess soa(Thread::Current());
+    mirror::Class* resolved_class = GetClassFromDexCache(soa.Self(),
+                                                         instr->GetDexFile(),
+                                                         instr->GetTypeIndex(),
+                                                         hint_dex_cache_);
+    SetClassAsTypeInfo(instr, resolved_class, /* is_exact */ false);
   }
 }
 
diff --git a/compiler/optimizing/reference_type_propagation.h b/compiler/optimizing/reference_type_propagation.h
index 215e967..4663471 100644
--- a/compiler/optimizing/reference_type_propagation.h
+++ b/compiler/optimizing/reference_type_propagation.h
@@ -33,7 +33,6 @@
 class ReferenceTypePropagation : public HOptimization {
  public:
   ReferenceTypePropagation(HGraph* graph,
-                           Handle<mirror::ClassLoader> class_loader,
                            Handle<mirror::DexCache> hint_dex_cache,
                            VariableSizedHandleScope* handles,
                            bool is_first_run,
@@ -106,8 +105,6 @@
 
   void ValidateTypes();
 
-  Handle<mirror::ClassLoader> class_loader_;
-
   // Note: hint_dex_cache_ is usually, but not necessarily, the dex cache associated with
   // graph_->GetDexFile(). Since we may look up also in other dex files, it's used only
   // as a hint, to reduce the number of calls to the costly ClassLinker::FindDexCache().
diff --git a/compiler/optimizing/reference_type_propagation_test.cc b/compiler/optimizing/reference_type_propagation_test.cc
index 84a4bab..b061c87 100644
--- a/compiler/optimizing/reference_type_propagation_test.cc
+++ b/compiler/optimizing/reference_type_propagation_test.cc
@@ -38,7 +38,6 @@
   void SetupPropagation(VariableSizedHandleScope* handles) {
     graph_->InitializeInexactObjectRTI(handles);
     propagation_ = new (&allocator_) ReferenceTypePropagation(graph_,
-                                                              Handle<mirror::ClassLoader>(),
                                                               Handle<mirror::DexCache>(),
                                                               handles,
                                                               true,
diff --git a/compiler/optimizing/ssa_builder.cc b/compiler/optimizing/ssa_builder.cc
index 50ab11b..487e4dd 100644
--- a/compiler/optimizing/ssa_builder.cc
+++ b/compiler/optimizing/ssa_builder.cc
@@ -499,11 +499,7 @@
 
   // 4) Compute type of reference type instructions. The pass assumes that
   // NullConstant has been fixed up.
-  ReferenceTypePropagation(graph_,
-                           class_loader_,
-                           dex_cache_,
-                           handles_,
-                           /* is_first_run */ true).Run();
+  ReferenceTypePropagation(graph_, dex_cache_, handles_, /* is_first_run */ true).Run();
 
   // 5) HInstructionBuilder duplicated ArrayGet instructions with ambiguous type
   // (int/float or long/double) and marked ArraySets with ambiguous input type.
diff --git a/compiler/optimizing/ssa_builder.h b/compiler/optimizing/ssa_builder.h
index 978f113..45dac54 100644
--- a/compiler/optimizing/ssa_builder.h
+++ b/compiler/optimizing/ssa_builder.h
@@ -48,11 +48,9 @@
 class SsaBuilder : public ValueObject {
  public:
   SsaBuilder(HGraph* graph,
-             Handle<mirror::ClassLoader> class_loader,
              Handle<mirror::DexCache> dex_cache,
              VariableSizedHandleScope* handles)
       : graph_(graph),
-        class_loader_(class_loader),
         dex_cache_(dex_cache),
         handles_(handles),
         agets_fixed_(false),
@@ -117,7 +115,6 @@
   void RemoveRedundantUninitializedStrings();
 
   HGraph* graph_;
-  Handle<mirror::ClassLoader> class_loader_;
   Handle<mirror::DexCache> dex_cache_;
   VariableSizedHandleScope* const handles_;