| /* |
| * 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. |
| */ |
| |
| #include "optimizing_compiler.h" |
| |
| #include <fstream> |
| #include <stdint.h> |
| |
| #ifdef ART_ENABLE_CODEGEN_arm64 |
| #include "instruction_simplifier_arm64.h" |
| #endif |
| |
| #include "art_method-inl.h" |
| #include "base/arena_allocator.h" |
| #include "base/dumpable.h" |
| #include "base/timing_logger.h" |
| #include "boolean_simplifier.h" |
| #include "bounds_check_elimination.h" |
| #include "builder.h" |
| #include "code_generator.h" |
| #include "compiled_method.h" |
| #include "compiler.h" |
| #include "constant_folding.h" |
| #include "dead_code_elimination.h" |
| #include "dex/quick/dex_file_to_method_inliner_map.h" |
| #include "dex/verified_method.h" |
| #include "dex/verification_results.h" |
| #include "driver/compiler_driver.h" |
| #include "driver/compiler_driver-inl.h" |
| #include "driver/compiler_options.h" |
| #include "driver/dex_compilation_unit.h" |
| #include "elf_writer_quick.h" |
| #include "graph_checker.h" |
| #include "graph_visualizer.h" |
| #include "gvn.h" |
| #include "inliner.h" |
| #include "instruction_simplifier.h" |
| #include "intrinsics.h" |
| #include "licm.h" |
| #include "jni/quick/jni_compiler.h" |
| #include "nodes.h" |
| #include "prepare_for_register_allocation.h" |
| #include "reference_type_propagation.h" |
| #include "register_allocator.h" |
| #include "side_effects_analysis.h" |
| #include "ssa_builder.h" |
| #include "ssa_phi_elimination.h" |
| #include "ssa_liveness_analysis.h" |
| #include "utils/assembler.h" |
| |
| namespace art { |
| |
| /** |
| * Used by the code generator, to allocate the code in a vector. |
| */ |
| class CodeVectorAllocator FINAL : public CodeAllocator { |
| public: |
| CodeVectorAllocator() : size_(0) {} |
| |
| virtual uint8_t* Allocate(size_t size) { |
| size_ = size; |
| memory_.resize(size); |
| return &memory_[0]; |
| } |
| |
| size_t GetSize() const { return size_; } |
| const std::vector<uint8_t>& GetMemory() const { return memory_; } |
| |
| private: |
| std::vector<uint8_t> memory_; |
| size_t size_; |
| |
| DISALLOW_COPY_AND_ASSIGN(CodeVectorAllocator); |
| }; |
| |
| /** |
| * Filter to apply to the visualizer. Methods whose name contain that filter will |
| * be dumped. |
| */ |
| static constexpr const char kStringFilter[] = ""; |
| |
| class PassScope; |
| |
| class PassObserver : public ValueObject { |
| public: |
| PassObserver(HGraph* graph, |
| const char* method_name, |
| CodeGenerator* codegen, |
| std::ostream* visualizer_output, |
| CompilerDriver* compiler_driver) |
| : graph_(graph), |
| method_name_(method_name), |
| timing_logger_enabled_(compiler_driver->GetDumpPasses()), |
| timing_logger_(method_name, true, true), |
| disasm_info_(graph->GetArena()), |
| visualizer_enabled_(!compiler_driver->GetDumpCfgFileName().empty()), |
| visualizer_(visualizer_output, graph, *codegen), |
| graph_in_bad_state_(false) { |
| if (timing_logger_enabled_ || visualizer_enabled_) { |
| if (!IsVerboseMethod(compiler_driver, method_name)) { |
| timing_logger_enabled_ = visualizer_enabled_ = false; |
| } |
| if (visualizer_enabled_) { |
| visualizer_.PrintHeader(method_name_); |
| codegen->SetDisassemblyInformation(&disasm_info_); |
| } |
| } |
| } |
| |
| ~PassObserver() { |
| if (timing_logger_enabled_) { |
| LOG(INFO) << "TIMINGS " << method_name_; |
| LOG(INFO) << Dumpable<TimingLogger>(timing_logger_); |
| } |
| } |
| |
| void DumpDisassembly() const { |
| if (visualizer_enabled_) { |
| visualizer_.DumpGraphWithDisassembly(); |
| } |
| } |
| |
| void SetGraphInBadState() { graph_in_bad_state_ = true; } |
| |
| private: |
| void StartPass(const char* pass_name) { |
| // Dump graph first, then start timer. |
| if (visualizer_enabled_) { |
| visualizer_.DumpGraph(pass_name, /* is_after_pass */ false, graph_in_bad_state_); |
| } |
| if (timing_logger_enabled_) { |
| timing_logger_.StartTiming(pass_name); |
| } |
| } |
| |
| void EndPass(const char* pass_name) { |
| // Pause timer first, then dump graph. |
| if (timing_logger_enabled_) { |
| timing_logger_.EndTiming(); |
| } |
| if (visualizer_enabled_) { |
| visualizer_.DumpGraph(pass_name, /* is_after_pass */ true, graph_in_bad_state_); |
| } |
| |
| // Validate the HGraph if running in debug mode. |
| if (kIsDebugBuild) { |
| if (!graph_in_bad_state_) { |
| if (graph_->IsInSsaForm()) { |
| SSAChecker checker(graph_->GetArena(), graph_); |
| checker.Run(); |
| if (!checker.IsValid()) { |
| LOG(FATAL) << "Error after " << pass_name << ": " << Dumpable<SSAChecker>(checker); |
| } |
| } else { |
| GraphChecker checker(graph_->GetArena(), graph_); |
| checker.Run(); |
| if (!checker.IsValid()) { |
| LOG(FATAL) << "Error after " << pass_name << ": " << Dumpable<GraphChecker>(checker); |
| } |
| } |
| } |
| } |
| } |
| |
| static bool IsVerboseMethod(CompilerDriver* compiler_driver, const char* method_name) { |
| // Test an exact match to --verbose-methods. If verbose-methods is set, this overrides an |
| // empty kStringFilter matching all methods. |
| if (compiler_driver->GetCompilerOptions().HasVerboseMethods()) { |
| return compiler_driver->GetCompilerOptions().IsVerboseMethod(method_name); |
| } |
| |
| // Test the kStringFilter sub-string. constexpr helper variable to silence unreachable-code |
| // warning when the string is empty. |
| constexpr bool kStringFilterEmpty = arraysize(kStringFilter) <= 1; |
| if (kStringFilterEmpty || strstr(method_name, kStringFilter) != nullptr) { |
| return true; |
| } |
| |
| return false; |
| } |
| |
| HGraph* const graph_; |
| const char* method_name_; |
| |
| bool timing_logger_enabled_; |
| TimingLogger timing_logger_; |
| |
| DisassemblyInformation disasm_info_; |
| |
| bool visualizer_enabled_; |
| HGraphVisualizer visualizer_; |
| |
| // Flag to be set by the compiler if the pass failed and the graph is not |
| // expected to validate. |
| bool graph_in_bad_state_; |
| |
| friend PassScope; |
| |
| DISALLOW_COPY_AND_ASSIGN(PassObserver); |
| }; |
| |
| class PassScope : public ValueObject { |
| public: |
| PassScope(const char *pass_name, PassObserver* pass_observer) |
| : pass_name_(pass_name), |
| pass_observer_(pass_observer) { |
| pass_observer_->StartPass(pass_name_); |
| } |
| |
| ~PassScope() { |
| pass_observer_->EndPass(pass_name_); |
| } |
| |
| private: |
| const char* const pass_name_; |
| PassObserver* const pass_observer_; |
| }; |
| |
| class OptimizingCompiler FINAL : public Compiler { |
| public: |
| explicit OptimizingCompiler(CompilerDriver* driver); |
| ~OptimizingCompiler(); |
| |
| bool CanCompileMethod(uint32_t method_idx, const DexFile& dex_file, CompilationUnit* cu) const |
| OVERRIDE; |
| |
| CompiledMethod* Compile(const DexFile::CodeItem* code_item, |
| uint32_t access_flags, |
| InvokeType invoke_type, |
| uint16_t class_def_idx, |
| uint32_t method_idx, |
| jobject class_loader, |
| const DexFile& dex_file) const OVERRIDE; |
| |
| CompiledMethod* TryCompile(const DexFile::CodeItem* code_item, |
| uint32_t access_flags, |
| InvokeType invoke_type, |
| uint16_t class_def_idx, |
| uint32_t method_idx, |
| jobject class_loader, |
| const DexFile& dex_file) const; |
| |
| CompiledMethod* JniCompile(uint32_t access_flags, |
| uint32_t method_idx, |
| const DexFile& dex_file) const OVERRIDE { |
| return ArtQuickJniCompileMethod(GetCompilerDriver(), access_flags, method_idx, dex_file); |
| } |
| |
| uintptr_t GetEntryPointOf(ArtMethod* method) const OVERRIDE |
| SHARED_REQUIRES(Locks::mutator_lock_) { |
| return reinterpret_cast<uintptr_t>(method->GetEntryPointFromQuickCompiledCodePtrSize( |
| InstructionSetPointerSize(GetCompilerDriver()->GetInstructionSet()))); |
| } |
| |
| void InitCompilationUnit(CompilationUnit& cu) const OVERRIDE; |
| |
| void Init() OVERRIDE; |
| |
| void UnInit() const OVERRIDE; |
| |
| void MaybeRecordStat(MethodCompilationStat compilation_stat) const { |
| if (compilation_stats_.get() != nullptr) { |
| compilation_stats_->RecordStat(compilation_stat); |
| } |
| } |
| |
| private: |
| // Whether we should run any optimization or register allocation. If false, will |
| // just run the code generation after the graph was built. |
| const bool run_optimizations_; |
| |
| // Optimize and compile `graph`. |
| CompiledMethod* CompileOptimized(HGraph* graph, |
| CodeGenerator* codegen, |
| CompilerDriver* driver, |
| const DexCompilationUnit& dex_compilation_unit, |
| PassObserver* pass_observer) const; |
| |
| // Just compile without doing optimizations. |
| CompiledMethod* CompileBaseline(CodeGenerator* codegen, |
| CompilerDriver* driver, |
| const DexCompilationUnit& dex_compilation_unit, |
| PassObserver* pass_observer) const; |
| |
| std::unique_ptr<OptimizingCompilerStats> compilation_stats_; |
| |
| std::unique_ptr<std::ostream> visualizer_output_; |
| |
| // Delegate to Quick in case the optimizing compiler cannot compile a method. |
| std::unique_ptr<Compiler> delegate_; |
| |
| DISALLOW_COPY_AND_ASSIGN(OptimizingCompiler); |
| }; |
| |
| static const int kMaximumCompilationTimeBeforeWarning = 100; /* ms */ |
| |
| OptimizingCompiler::OptimizingCompiler(CompilerDriver* driver) |
| : Compiler(driver, kMaximumCompilationTimeBeforeWarning), |
| run_optimizations_( |
| (driver->GetCompilerOptions().GetCompilerFilter() != CompilerOptions::kTime) |
| && !driver->GetCompilerOptions().GetDebuggable()), |
| delegate_(Create(driver, Compiler::Kind::kQuick)) {} |
| |
| void OptimizingCompiler::Init() { |
| delegate_->Init(); |
| // Enable C1visualizer output. Must be done in Init() because the compiler |
| // driver is not fully initialized when passed to the compiler's constructor. |
| CompilerDriver* driver = GetCompilerDriver(); |
| const std::string cfg_file_name = driver->GetDumpCfgFileName(); |
| if (!cfg_file_name.empty()) { |
| CHECK_EQ(driver->GetThreadCount(), 1U) |
| << "Graph visualizer requires the compiler to run single-threaded. " |
| << "Invoke the compiler with '-j1'."; |
| visualizer_output_.reset(new std::ofstream(cfg_file_name)); |
| } |
| if (driver->GetDumpStats()) { |
| compilation_stats_.reset(new OptimizingCompilerStats()); |
| } |
| } |
| |
| void OptimizingCompiler::UnInit() const { |
| delegate_->UnInit(); |
| } |
| |
| OptimizingCompiler::~OptimizingCompiler() { |
| if (compilation_stats_.get() != nullptr) { |
| compilation_stats_->Log(); |
| } |
| } |
| |
| void OptimizingCompiler::InitCompilationUnit(CompilationUnit& cu) const { |
| delegate_->InitCompilationUnit(cu); |
| } |
| |
| bool OptimizingCompiler::CanCompileMethod(uint32_t method_idx ATTRIBUTE_UNUSED, |
| const DexFile& dex_file ATTRIBUTE_UNUSED, |
| CompilationUnit* cu ATTRIBUTE_UNUSED) const { |
| return true; |
| } |
| |
| static bool IsInstructionSetSupported(InstructionSet instruction_set) { |
| return instruction_set == kArm64 |
| || (instruction_set == kThumb2 && !kArm32QuickCodeUseSoftFloat) |
| || instruction_set == kMips64 |
| || instruction_set == kX86 |
| || instruction_set == kX86_64; |
| } |
| |
| static void RunOptimizations(HOptimization* optimizations[], |
| size_t length, |
| PassObserver* pass_observer) { |
| for (size_t i = 0; i < length; ++i) { |
| PassScope scope(optimizations[i]->GetPassName(), pass_observer); |
| optimizations[i]->Run(); |
| } |
| } |
| |
| static void MaybeRunInliner(HGraph* graph, |
| CompilerDriver* driver, |
| OptimizingCompilerStats* stats, |
| const DexCompilationUnit& dex_compilation_unit, |
| PassObserver* pass_observer, |
| StackHandleScopeCollection* handles) { |
| const CompilerOptions& compiler_options = driver->GetCompilerOptions(); |
| bool should_inline = (compiler_options.GetInlineDepthLimit() > 0) |
| && (compiler_options.GetInlineMaxCodeUnits() > 0); |
| if (!should_inline) { |
| return; |
| } |
| |
| ArenaAllocator* arena = graph->GetArena(); |
| HInliner* inliner = new (arena) HInliner( |
| graph, dex_compilation_unit, dex_compilation_unit, driver, handles, stats); |
| ReferenceTypePropagation* type_propagation = |
| new (arena) ReferenceTypePropagation(graph, handles, |
| "reference_type_propagation_after_inlining"); |
| |
| HOptimization* optimizations[] = { |
| inliner, |
| // Run another type propagation phase: inlining will open up more opportunities |
| // to remove checkcast/instanceof and null checks. |
| type_propagation, |
| }; |
| |
| RunOptimizations(optimizations, arraysize(optimizations), pass_observer); |
| } |
| |
| static void RunArchOptimizations(InstructionSet instruction_set, |
| HGraph* graph, |
| OptimizingCompilerStats* stats, |
| PassObserver* pass_observer) { |
| ArenaAllocator* arena = graph->GetArena(); |
| switch (instruction_set) { |
| #ifdef ART_ENABLE_CODEGEN_arm64 |
| case kArm64: { |
| arm64::InstructionSimplifierArm64* simplifier = |
| new (arena) arm64::InstructionSimplifierArm64(graph, stats); |
| SideEffectsAnalysis* side_effects = new (arena) SideEffectsAnalysis(graph); |
| GVNOptimization* gvn = new (arena) GVNOptimization(graph, *side_effects, "GVN_after_arch"); |
| HOptimization* arm64_optimizations[] = { |
| simplifier, |
| side_effects, |
| gvn |
| }; |
| RunOptimizations(arm64_optimizations, arraysize(arm64_optimizations), pass_observer); |
| break; |
| } |
| #endif |
| default: |
| break; |
| } |
| } |
| |
| static void RunOptimizations(HGraph* graph, |
| CompilerDriver* driver, |
| OptimizingCompilerStats* stats, |
| const DexCompilationUnit& dex_compilation_unit, |
| PassObserver* pass_observer, |
| StackHandleScopeCollection* handles) { |
| ArenaAllocator* arena = graph->GetArena(); |
| HDeadCodeElimination* dce1 = new (arena) HDeadCodeElimination( |
| graph, stats, HDeadCodeElimination::kInitialDeadCodeEliminationPassName); |
| HDeadCodeElimination* dce2 = new (arena) HDeadCodeElimination( |
| graph, stats, HDeadCodeElimination::kFinalDeadCodeEliminationPassName); |
| HConstantFolding* fold1 = new (arena) HConstantFolding(graph); |
| InstructionSimplifier* simplify1 = new (arena) InstructionSimplifier(graph, stats); |
| HBooleanSimplifier* boolean_simplify = new (arena) HBooleanSimplifier(graph); |
| HConstantFolding* fold2 = new (arena) HConstantFolding(graph, "constant_folding_after_inlining"); |
| SideEffectsAnalysis* side_effects = new (arena) SideEffectsAnalysis(graph); |
| GVNOptimization* gvn = new (arena) GVNOptimization(graph, *side_effects); |
| LICM* licm = new (arena) LICM(graph, *side_effects); |
| BoundsCheckElimination* bce = new (arena) BoundsCheckElimination(graph); |
| ReferenceTypePropagation* type_propagation = |
| new (arena) ReferenceTypePropagation(graph, handles); |
| InstructionSimplifier* simplify2 = new (arena) InstructionSimplifier( |
| graph, stats, "instruction_simplifier_after_types"); |
| InstructionSimplifier* simplify3 = new (arena) InstructionSimplifier( |
| graph, stats, "instruction_simplifier_after_bce"); |
| InstructionSimplifier* simplify4 = new (arena) InstructionSimplifier( |
| graph, stats, "instruction_simplifier_before_codegen"); |
| |
| IntrinsicsRecognizer* intrinsics = new (arena) IntrinsicsRecognizer(graph, driver); |
| |
| HOptimization* optimizations1[] = { |
| intrinsics, |
| fold1, |
| simplify1, |
| type_propagation, |
| dce1, |
| simplify2 |
| }; |
| |
| RunOptimizations(optimizations1, arraysize(optimizations1), pass_observer); |
| |
| if (graph->HasTryCatch()) { |
| // TODO: Update the optimizations below to work correctly under try/catch |
| // semantics. The optimizations above suffice for running codegen |
| // in the meanwhile. |
| return; |
| } |
| |
| MaybeRunInliner(graph, driver, stats, dex_compilation_unit, pass_observer, handles); |
| |
| HOptimization* optimizations2[] = { |
| // BooleanSimplifier depends on the InstructionSimplifier removing redundant |
| // suspend checks to recognize empty blocks. |
| boolean_simplify, |
| fold2, // TODO: if we don't inline we can also skip fold2. |
| side_effects, |
| gvn, |
| licm, |
| bce, |
| simplify3, |
| dce2, |
| // The codegen has a few assumptions that only the instruction simplifier can |
| // satisfy. For example, the code generator does not expect to see a |
| // HTypeConversion from a type to the same type. |
| simplify4, |
| }; |
| |
| RunOptimizations(optimizations2, arraysize(optimizations2), pass_observer); |
| |
| RunArchOptimizations(driver->GetInstructionSet(), graph, stats, pass_observer); |
| } |
| |
| // The stack map we generate must be 4-byte aligned on ARM. Since existing |
| // maps are generated alongside these stack maps, we must also align them. |
| static ArrayRef<const uint8_t> AlignVectorSize(std::vector<uint8_t>& vector) { |
| size_t size = vector.size(); |
| size_t aligned_size = RoundUp(size, 4); |
| for (; size < aligned_size; ++size) { |
| vector.push_back(0); |
| } |
| return ArrayRef<const uint8_t>(vector); |
| } |
| |
| static void AllocateRegisters(HGraph* graph, |
| CodeGenerator* codegen, |
| PassObserver* pass_observer) { |
| PrepareForRegisterAllocation(graph).Run(); |
| SsaLivenessAnalysis liveness(graph, codegen); |
| { |
| PassScope scope(SsaLivenessAnalysis::kLivenessPassName, pass_observer); |
| liveness.Analyze(); |
| } |
| { |
| PassScope scope(RegisterAllocator::kRegisterAllocatorPassName, pass_observer); |
| RegisterAllocator(graph->GetArena(), codegen, liveness).AllocateRegisters(); |
| } |
| } |
| |
| static ArenaVector<LinkerPatch> EmitAndSortLinkerPatches(CodeGenerator* codegen) { |
| ArenaVector<LinkerPatch> linker_patches(codegen->GetGraph()->GetArena()->Adapter()); |
| codegen->EmitLinkerPatches(&linker_patches); |
| |
| // Sort patches by literal offset. Required for .oat_patches encoding. |
| std::sort(linker_patches.begin(), linker_patches.end(), |
| [](const LinkerPatch& lhs, const LinkerPatch& rhs) { |
| return lhs.LiteralOffset() < rhs.LiteralOffset(); |
| }); |
| |
| return linker_patches; |
| } |
| |
| CompiledMethod* OptimizingCompiler::CompileOptimized(HGraph* graph, |
| CodeGenerator* codegen, |
| CompilerDriver* compiler_driver, |
| const DexCompilationUnit& dex_compilation_unit, |
| PassObserver* pass_observer) const { |
| StackHandleScopeCollection handles(Thread::Current()); |
| RunOptimizations(graph, compiler_driver, compilation_stats_.get(), |
| dex_compilation_unit, pass_observer, &handles); |
| |
| if (graph->HasTryCatch()) { |
| return nullptr; |
| } |
| |
| AllocateRegisters(graph, codegen, pass_observer); |
| |
| CodeVectorAllocator allocator; |
| codegen->CompileOptimized(&allocator); |
| |
| ArenaVector<LinkerPatch> linker_patches = EmitAndSortLinkerPatches(codegen); |
| |
| DefaultSrcMap src_mapping_table; |
| if (compiler_driver->GetCompilerOptions().GetGenerateDebugInfo()) { |
| codegen->BuildSourceMap(&src_mapping_table); |
| } |
| |
| std::vector<uint8_t> stack_map; |
| codegen->BuildStackMaps(&stack_map); |
| |
| MaybeRecordStat(MethodCompilationStat::kCompiledOptimized); |
| |
| CompiledMethod* compiled_method = CompiledMethod::SwapAllocCompiledMethod( |
| compiler_driver, |
| codegen->GetInstructionSet(), |
| ArrayRef<const uint8_t>(allocator.GetMemory()), |
| // Follow Quick's behavior and set the frame size to zero if it is |
| // considered "empty" (see the definition of |
| // art::CodeGenerator::HasEmptyFrame). |
| codegen->HasEmptyFrame() ? 0 : codegen->GetFrameSize(), |
| codegen->GetCoreSpillMask(), |
| codegen->GetFpuSpillMask(), |
| &src_mapping_table, |
| ArrayRef<const uint8_t>(), // mapping_table. |
| ArrayRef<const uint8_t>(stack_map), |
| ArrayRef<const uint8_t>(), // native_gc_map. |
| ArrayRef<const uint8_t>(*codegen->GetAssembler()->cfi().data()), |
| ArrayRef<const LinkerPatch>(linker_patches)); |
| pass_observer->DumpDisassembly(); |
| return compiled_method; |
| } |
| |
| CompiledMethod* OptimizingCompiler::CompileBaseline( |
| CodeGenerator* codegen, |
| CompilerDriver* compiler_driver, |
| const DexCompilationUnit& dex_compilation_unit, |
| PassObserver* pass_observer) const { |
| CodeVectorAllocator allocator; |
| codegen->CompileBaseline(&allocator); |
| |
| ArenaVector<LinkerPatch> linker_patches = EmitAndSortLinkerPatches(codegen); |
| |
| std::vector<uint8_t> mapping_table; |
| codegen->BuildMappingTable(&mapping_table); |
| DefaultSrcMap src_mapping_table; |
| if (compiler_driver->GetCompilerOptions().GetGenerateDebugInfo()) { |
| codegen->BuildSourceMap(&src_mapping_table); |
| } |
| std::vector<uint8_t> vmap_table; |
| codegen->BuildVMapTable(&vmap_table); |
| std::vector<uint8_t> gc_map; |
| codegen->BuildNativeGCMap(&gc_map, dex_compilation_unit); |
| |
| MaybeRecordStat(MethodCompilationStat::kCompiledBaseline); |
| CompiledMethod* compiled_method = CompiledMethod::SwapAllocCompiledMethod( |
| compiler_driver, |
| codegen->GetInstructionSet(), |
| ArrayRef<const uint8_t>(allocator.GetMemory()), |
| // Follow Quick's behavior and set the frame size to zero if it is |
| // considered "empty" (see the definition of |
| // art::CodeGenerator::HasEmptyFrame). |
| codegen->HasEmptyFrame() ? 0 : codegen->GetFrameSize(), |
| codegen->GetCoreSpillMask(), |
| codegen->GetFpuSpillMask(), |
| &src_mapping_table, |
| AlignVectorSize(mapping_table), |
| AlignVectorSize(vmap_table), |
| AlignVectorSize(gc_map), |
| ArrayRef<const uint8_t>(*codegen->GetAssembler()->cfi().data()), |
| ArrayRef<const LinkerPatch>(linker_patches)); |
| pass_observer->DumpDisassembly(); |
| return compiled_method; |
| } |
| |
| CompiledMethod* OptimizingCompiler::TryCompile(const DexFile::CodeItem* code_item, |
| uint32_t access_flags, |
| InvokeType invoke_type, |
| uint16_t class_def_idx, |
| uint32_t method_idx, |
| jobject class_loader, |
| const DexFile& dex_file) const { |
| UNUSED(invoke_type); |
| std::string method_name = PrettyMethod(method_idx, dex_file); |
| MaybeRecordStat(MethodCompilationStat::kAttemptCompilation); |
| CompilerDriver* compiler_driver = GetCompilerDriver(); |
| InstructionSet instruction_set = compiler_driver->GetInstructionSet(); |
| // Always use the thumb2 assembler: some runtime functionality (like implicit stack |
| // overflow checks) assume thumb2. |
| if (instruction_set == kArm) { |
| instruction_set = kThumb2; |
| } |
| |
| // Do not attempt to compile on architectures we do not support. |
| if (!IsInstructionSetSupported(instruction_set)) { |
| MaybeRecordStat(MethodCompilationStat::kNotCompiledUnsupportedIsa); |
| return nullptr; |
| } |
| |
| if (Compiler::IsPathologicalCase(*code_item, method_idx, dex_file)) { |
| MaybeRecordStat(MethodCompilationStat::kNotCompiledPathological); |
| return nullptr; |
| } |
| |
| // Implementation of the space filter: do not compile a code item whose size in |
| // code units is bigger than 128. |
| static constexpr size_t kSpaceFilterOptimizingThreshold = 128; |
| const CompilerOptions& compiler_options = compiler_driver->GetCompilerOptions(); |
| if ((compiler_options.GetCompilerFilter() == CompilerOptions::kSpace) |
| && (code_item->insns_size_in_code_units_ > kSpaceFilterOptimizingThreshold)) { |
| MaybeRecordStat(MethodCompilationStat::kNotCompiledSpaceFilter); |
| return nullptr; |
| } |
| |
| DexCompilationUnit dex_compilation_unit( |
| nullptr, class_loader, Runtime::Current()->GetClassLinker(), dex_file, code_item, |
| class_def_idx, method_idx, access_flags, |
| compiler_driver->GetVerifiedMethod(&dex_file, method_idx)); |
| |
| bool requires_barrier = dex_compilation_unit.IsConstructor() |
| && compiler_driver->RequiresConstructorBarrier(Thread::Current(), |
| dex_compilation_unit.GetDexFile(), |
| dex_compilation_unit.GetClassDefIndex()); |
| ArenaAllocator arena(Runtime::Current()->GetArenaPool()); |
| HGraph* graph = new (&arena) HGraph( |
| &arena, dex_file, method_idx, requires_barrier, compiler_driver->GetInstructionSet(), |
| kInvalidInvokeType, compiler_driver->GetCompilerOptions().GetDebuggable()); |
| |
| // For testing purposes, we put a special marker on method names that should be compiled |
| // with this compiler. This makes sure we're not regressing. |
| bool shouldCompile = method_name.find("$opt$") != std::string::npos; |
| bool shouldOptimize = method_name.find("$opt$reg$") != std::string::npos && run_optimizations_; |
| |
| std::unique_ptr<CodeGenerator> codegen( |
| CodeGenerator::Create(graph, |
| instruction_set, |
| *compiler_driver->GetInstructionSetFeatures(), |
| compiler_driver->GetCompilerOptions())); |
| if (codegen.get() == nullptr) { |
| CHECK(!shouldCompile) << "Could not find code generator for optimizing compiler"; |
| MaybeRecordStat(MethodCompilationStat::kNotCompiledNoCodegen); |
| return nullptr; |
| } |
| codegen->GetAssembler()->cfi().SetEnabled( |
| compiler_driver->GetCompilerOptions().GetGenerateDebugInfo()); |
| |
| PassObserver pass_observer(graph, |
| method_name.c_str(), |
| codegen.get(), |
| visualizer_output_.get(), |
| compiler_driver); |
| |
| const uint8_t* interpreter_metadata = nullptr; |
| { |
| ScopedObjectAccess soa(Thread::Current()); |
| StackHandleScope<4> hs(soa.Self()); |
| ClassLinker* class_linker = dex_compilation_unit.GetClassLinker(); |
| Handle<mirror::DexCache> dex_cache(hs.NewHandle(class_linker->FindDexCache(dex_file))); |
| Handle<mirror::ClassLoader> loader(hs.NewHandle( |
| soa.Decode<mirror::ClassLoader*>(class_loader))); |
| ArtMethod* art_method = compiler_driver->ResolveMethod( |
| soa, dex_cache, loader, &dex_compilation_unit, method_idx, invoke_type); |
| // We may not get a method, for example if its class is erroneous. |
| // TODO: Clean this up, the compiler driver should just pass the ArtMethod to compile. |
| if (art_method != nullptr) { |
| interpreter_metadata = art_method->GetQuickenedInfo(); |
| } |
| } |
| HGraphBuilder builder(graph, |
| &dex_compilation_unit, |
| &dex_compilation_unit, |
| &dex_file, |
| compiler_driver, |
| compilation_stats_.get(), |
| interpreter_metadata); |
| |
| VLOG(compiler) << "Building " << method_name; |
| |
| { |
| PassScope scope(HGraphBuilder::kBuilderPassName, &pass_observer); |
| if (!builder.BuildGraph(*code_item)) { |
| DCHECK(!(IsCompilingWithCoreImage() && shouldCompile)) |
| << "Could not build graph in optimizing compiler"; |
| pass_observer.SetGraphInBadState(); |
| return nullptr; |
| } |
| } |
| |
| bool can_allocate_registers = RegisterAllocator::CanAllocateRegistersFor(*graph, instruction_set); |
| |
| // `run_optimizations_` is set explicitly (either through a compiler filter |
| // or the debuggable flag). If it is set, we can run baseline. Otherwise, we fall back |
| // to Quick. |
| bool can_use_baseline = !run_optimizations_ && builder.CanUseBaselineForStringInit(); |
| if (run_optimizations_ && can_allocate_registers) { |
| VLOG(compiler) << "Optimizing " << method_name; |
| |
| { |
| PassScope scope(SsaBuilder::kSsaBuilderPassName, &pass_observer); |
| if (!graph->TryBuildingSsa()) { |
| // We could not transform the graph to SSA, bailout. |
| LOG(INFO) << "Skipping compilation of " << method_name << ": it contains a non natural loop"; |
| MaybeRecordStat(MethodCompilationStat::kNotCompiledCannotBuildSSA); |
| pass_observer.SetGraphInBadState(); |
| return nullptr; |
| } |
| } |
| |
| return CompileOptimized(graph, |
| codegen.get(), |
| compiler_driver, |
| dex_compilation_unit, |
| &pass_observer); |
| } else if (shouldOptimize && can_allocate_registers) { |
| LOG(FATAL) << "Could not allocate registers in optimizing compiler"; |
| UNREACHABLE(); |
| } else if (can_use_baseline) { |
| VLOG(compiler) << "Compile baseline " << method_name; |
| |
| if (!run_optimizations_) { |
| MaybeRecordStat(MethodCompilationStat::kNotOptimizedDisabled); |
| } else if (!can_allocate_registers) { |
| MaybeRecordStat(MethodCompilationStat::kNotOptimizedRegisterAllocator); |
| } |
| |
| return CompileBaseline(codegen.get(), |
| compiler_driver, |
| dex_compilation_unit, |
| &pass_observer); |
| } else { |
| return nullptr; |
| } |
| } |
| |
| CompiledMethod* OptimizingCompiler::Compile(const DexFile::CodeItem* code_item, |
| uint32_t access_flags, |
| InvokeType invoke_type, |
| uint16_t class_def_idx, |
| uint32_t method_idx, |
| jobject jclass_loader, |
| const DexFile& dex_file) const { |
| CompilerDriver* compiler_driver = GetCompilerDriver(); |
| CompiledMethod* method = nullptr; |
| DCHECK(!compiler_driver->GetVerifiedMethod(&dex_file, method_idx)->HasRuntimeThrow()); |
| if (compiler_driver->IsMethodVerifiedWithoutFailures(method_idx, class_def_idx, dex_file)) { |
| method = TryCompile(code_item, access_flags, invoke_type, class_def_idx, |
| method_idx, jclass_loader, dex_file); |
| } else { |
| if (compiler_driver->GetCompilerOptions().VerifyAtRuntime()) { |
| MaybeRecordStat(MethodCompilationStat::kNotCompiledVerifyAtRuntime); |
| } else { |
| MaybeRecordStat(MethodCompilationStat::kNotCompiledClassNotVerified); |
| } |
| } |
| |
| if (method != nullptr) { |
| return method; |
| } |
| method = delegate_->Compile(code_item, access_flags, invoke_type, class_def_idx, method_idx, |
| jclass_loader, dex_file); |
| |
| if (method != nullptr) { |
| MaybeRecordStat(MethodCompilationStat::kCompiledQuick); |
| } |
| return method; |
| } |
| |
| Compiler* CreateOptimizingCompiler(CompilerDriver* driver) { |
| return new OptimizingCompiler(driver); |
| } |
| |
| bool IsCompilingWithCoreImage() { |
| const std::string& image = Runtime::Current()->GetImageLocation(); |
| return EndsWith(image, "core.art") || EndsWith(image, "core-optimizing.art"); |
| } |
| |
| } // namespace art |