973 lines
36 KiB
C++
973 lines
36 KiB
C++
/*
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* Copyright (C) 2014 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "optimizing_compiler.h"
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#include <fstream>
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#include <memory>
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#include <stdint.h>
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#ifdef ART_ENABLE_CODEGEN_arm
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#include "dex_cache_array_fixups_arm.h"
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#endif
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#ifdef ART_ENABLE_CODEGEN_arm64
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#include "instruction_simplifier_arm64.h"
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#endif
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#ifdef ART_ENABLE_CODEGEN_x86
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#include "pc_relative_fixups_x86.h"
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#endif
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#include "art_method-inl.h"
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#include "base/arena_allocator.h"
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#include "base/arena_containers.h"
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#include "base/dumpable.h"
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#include "base/macros.h"
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#include "base/timing_logger.h"
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#include "bounds_check_elimination.h"
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#include "builder.h"
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#include "code_generator.h"
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#include "compiled_method.h"
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#include "compiler.h"
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#include "constant_folding.h"
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#include "dead_code_elimination.h"
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#include "debug/elf_debug_writer.h"
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#include "debug/method_debug_info.h"
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#include "dex/quick/dex_file_to_method_inliner_map.h"
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#include "dex/verification_results.h"
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#include "dex/verified_method.h"
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#include "driver/compiler_driver-inl.h"
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#include "driver/compiler_options.h"
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#include "driver/dex_compilation_unit.h"
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#include "elf_writer_quick.h"
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#include "graph_checker.h"
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#include "graph_visualizer.h"
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#include "gvn.h"
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#include "induction_var_analysis.h"
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#include "inliner.h"
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#include "instruction_simplifier.h"
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#include "instruction_simplifier_arm.h"
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#include "intrinsics.h"
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#include "jit/debugger_interface.h"
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#include "jit/jit.h"
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#include "jit/jit_code_cache.h"
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#include "jni/quick/jni_compiler.h"
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#include "licm.h"
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#include "load_store_elimination.h"
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#include "nodes.h"
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#include "oat_quick_method_header.h"
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#include "prepare_for_register_allocation.h"
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#include "reference_type_propagation.h"
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#include "register_allocator.h"
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#include "select_generator.h"
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#include "sharpening.h"
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#include "side_effects_analysis.h"
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#include "ssa_builder.h"
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#include "ssa_liveness_analysis.h"
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#include "ssa_phi_elimination.h"
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#include "utils/assembler.h"
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#include "verifier/method_verifier.h"
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namespace art {
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static constexpr size_t kArenaAllocatorMemoryReportThreshold = 8 * MB;
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/**
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* Used by the code generator, to allocate the code in a vector.
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*/
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class CodeVectorAllocator FINAL : public CodeAllocator {
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public:
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explicit CodeVectorAllocator(ArenaAllocator* arena)
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: memory_(arena->Adapter(kArenaAllocCodeBuffer)),
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size_(0) {}
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virtual uint8_t* Allocate(size_t size) {
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size_ = size;
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memory_.resize(size);
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return &memory_[0];
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}
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size_t GetSize() const { return size_; }
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const ArenaVector<uint8_t>& GetMemory() const { return memory_; }
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private:
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ArenaVector<uint8_t> memory_;
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size_t size_;
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DISALLOW_COPY_AND_ASSIGN(CodeVectorAllocator);
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};
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/**
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* Filter to apply to the visualizer. Methods whose name contain that filter will
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* be dumped.
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*/
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static constexpr const char kStringFilter[] = "";
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class PassScope;
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class PassObserver : public ValueObject {
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public:
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PassObserver(HGraph* graph,
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CodeGenerator* codegen,
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std::ostream* visualizer_output,
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CompilerDriver* compiler_driver)
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: graph_(graph),
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cached_method_name_(),
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timing_logger_enabled_(compiler_driver->GetDumpPasses()),
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timing_logger_(timing_logger_enabled_ ? GetMethodName() : "", true, true),
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disasm_info_(graph->GetArena()),
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visualizer_enabled_(!compiler_driver->GetCompilerOptions().GetDumpCfgFileName().empty()),
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visualizer_(visualizer_output, graph, *codegen),
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graph_in_bad_state_(false) {
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if (timing_logger_enabled_ || visualizer_enabled_) {
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if (!IsVerboseMethod(compiler_driver, GetMethodName())) {
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timing_logger_enabled_ = visualizer_enabled_ = false;
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}
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if (visualizer_enabled_) {
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visualizer_.PrintHeader(GetMethodName());
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codegen->SetDisassemblyInformation(&disasm_info_);
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}
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}
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}
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~PassObserver() {
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if (timing_logger_enabled_) {
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LOG(INFO) << "TIMINGS " << GetMethodName();
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LOG(INFO) << Dumpable<TimingLogger>(timing_logger_);
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}
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}
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void DumpDisassembly() const {
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if (visualizer_enabled_) {
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visualizer_.DumpGraphWithDisassembly();
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}
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}
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void SetGraphInBadState() { graph_in_bad_state_ = true; }
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const char* GetMethodName() {
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// PrettyMethod() is expensive, so we delay calling it until we actually have to.
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if (cached_method_name_.empty()) {
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cached_method_name_ = PrettyMethod(graph_->GetMethodIdx(), graph_->GetDexFile());
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}
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return cached_method_name_.c_str();
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}
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private:
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void StartPass(const char* pass_name) {
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// Dump graph first, then start timer.
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if (visualizer_enabled_) {
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visualizer_.DumpGraph(pass_name, /* is_after_pass */ false, graph_in_bad_state_);
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}
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if (timing_logger_enabled_) {
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timing_logger_.StartTiming(pass_name);
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}
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}
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void EndPass(const char* pass_name) {
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// Pause timer first, then dump graph.
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if (timing_logger_enabled_) {
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timing_logger_.EndTiming();
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}
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if (visualizer_enabled_) {
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visualizer_.DumpGraph(pass_name, /* is_after_pass */ true, graph_in_bad_state_);
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}
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// Validate the HGraph if running in debug mode.
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if (kIsDebugBuild) {
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if (!graph_in_bad_state_) {
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GraphChecker checker(graph_);
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checker.Run();
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if (!checker.IsValid()) {
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LOG(FATAL) << "Error after " << pass_name << ": " << Dumpable<GraphChecker>(checker);
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}
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}
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}
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}
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static bool IsVerboseMethod(CompilerDriver* compiler_driver, const char* method_name) {
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// Test an exact match to --verbose-methods. If verbose-methods is set, this overrides an
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// empty kStringFilter matching all methods.
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if (compiler_driver->GetCompilerOptions().HasVerboseMethods()) {
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return compiler_driver->GetCompilerOptions().IsVerboseMethod(method_name);
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}
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// Test the kStringFilter sub-string. constexpr helper variable to silence unreachable-code
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// warning when the string is empty.
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constexpr bool kStringFilterEmpty = arraysize(kStringFilter) <= 1;
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if (kStringFilterEmpty || strstr(method_name, kStringFilter) != nullptr) {
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return true;
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}
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return false;
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}
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HGraph* const graph_;
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std::string cached_method_name_;
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bool timing_logger_enabled_;
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TimingLogger timing_logger_;
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DisassemblyInformation disasm_info_;
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bool visualizer_enabled_;
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HGraphVisualizer visualizer_;
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// Flag to be set by the compiler if the pass failed and the graph is not
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// expected to validate.
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bool graph_in_bad_state_;
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friend PassScope;
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DISALLOW_COPY_AND_ASSIGN(PassObserver);
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};
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class PassScope : public ValueObject {
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public:
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PassScope(const char *pass_name, PassObserver* pass_observer)
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: pass_name_(pass_name),
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pass_observer_(pass_observer) {
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pass_observer_->StartPass(pass_name_);
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}
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~PassScope() {
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pass_observer_->EndPass(pass_name_);
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}
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private:
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const char* const pass_name_;
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PassObserver* const pass_observer_;
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};
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class OptimizingCompiler FINAL : public Compiler {
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public:
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explicit OptimizingCompiler(CompilerDriver* driver);
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~OptimizingCompiler();
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bool CanCompileMethod(uint32_t method_idx, const DexFile& dex_file) const OVERRIDE;
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CompiledMethod* Compile(const DexFile::CodeItem* code_item,
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uint32_t access_flags,
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InvokeType invoke_type,
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uint16_t class_def_idx,
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uint32_t method_idx,
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jobject class_loader,
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const DexFile& dex_file,
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Handle<mirror::DexCache> dex_cache) const OVERRIDE;
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CompiledMethod* JniCompile(uint32_t access_flags,
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uint32_t method_idx,
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const DexFile& dex_file) const OVERRIDE {
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return ArtQuickJniCompileMethod(GetCompilerDriver(), access_flags, method_idx, dex_file);
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}
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uintptr_t GetEntryPointOf(ArtMethod* method) const OVERRIDE
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SHARED_REQUIRES(Locks::mutator_lock_) {
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return reinterpret_cast<uintptr_t>(method->GetEntryPointFromQuickCompiledCodePtrSize(
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InstructionSetPointerSize(GetCompilerDriver()->GetInstructionSet())));
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}
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void Init() OVERRIDE;
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void UnInit() const OVERRIDE;
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void MaybeRecordStat(MethodCompilationStat compilation_stat) const {
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if (compilation_stats_.get() != nullptr) {
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compilation_stats_->RecordStat(compilation_stat);
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}
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}
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bool JitCompile(Thread* self, jit::JitCodeCache* code_cache, ArtMethod* method, bool osr)
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OVERRIDE
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SHARED_REQUIRES(Locks::mutator_lock_);
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private:
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// Create a 'CompiledMethod' for an optimized graph.
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CompiledMethod* Emit(ArenaAllocator* arena,
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CodeVectorAllocator* code_allocator,
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CodeGenerator* codegen,
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CompilerDriver* driver,
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const DexFile::CodeItem* item) const;
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// Try compiling a method and return the code generator used for
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// compiling it.
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// This method:
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// 1) Builds the graph. Returns null if it failed to build it.
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// 2) Transforms the graph to SSA. Returns null if it failed.
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// 3) Runs optimizations on the graph, including register allocator.
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// 4) Generates code with the `code_allocator` provided.
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CodeGenerator* TryCompile(ArenaAllocator* arena,
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CodeVectorAllocator* code_allocator,
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const DexFile::CodeItem* code_item,
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uint32_t access_flags,
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InvokeType invoke_type,
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uint16_t class_def_idx,
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uint32_t method_idx,
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jobject class_loader,
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const DexFile& dex_file,
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Handle<mirror::DexCache> dex_cache,
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ArtMethod* method,
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bool osr) const;
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std::unique_ptr<OptimizingCompilerStats> compilation_stats_;
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std::unique_ptr<std::ostream> visualizer_output_;
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DISALLOW_COPY_AND_ASSIGN(OptimizingCompiler);
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};
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static const int kMaximumCompilationTimeBeforeWarning = 100; /* ms */
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OptimizingCompiler::OptimizingCompiler(CompilerDriver* driver)
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: Compiler(driver, kMaximumCompilationTimeBeforeWarning) {}
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void OptimizingCompiler::Init() {
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// Enable C1visualizer output. Must be done in Init() because the compiler
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// driver is not fully initialized when passed to the compiler's constructor.
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CompilerDriver* driver = GetCompilerDriver();
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const std::string cfg_file_name = driver->GetCompilerOptions().GetDumpCfgFileName();
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if (!cfg_file_name.empty()) {
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CHECK_EQ(driver->GetThreadCount(), 1U)
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<< "Graph visualizer requires the compiler to run single-threaded. "
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<< "Invoke the compiler with '-j1'.";
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std::ios_base::openmode cfg_file_mode =
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driver->GetCompilerOptions().GetDumpCfgAppend() ? std::ofstream::app : std::ofstream::out;
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visualizer_output_.reset(new std::ofstream(cfg_file_name, cfg_file_mode));
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}
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if (driver->GetDumpStats()) {
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compilation_stats_.reset(new OptimizingCompilerStats());
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}
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}
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void OptimizingCompiler::UnInit() const {
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}
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OptimizingCompiler::~OptimizingCompiler() {
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if (compilation_stats_.get() != nullptr) {
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compilation_stats_->Log();
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}
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}
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bool OptimizingCompiler::CanCompileMethod(uint32_t method_idx ATTRIBUTE_UNUSED,
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const DexFile& dex_file ATTRIBUTE_UNUSED) const {
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return true;
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}
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static bool IsInstructionSetSupported(InstructionSet instruction_set) {
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return (instruction_set == kArm && !kArm32QuickCodeUseSoftFloat)
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|| instruction_set == kArm64
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|| (instruction_set == kThumb2 && !kArm32QuickCodeUseSoftFloat)
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|| instruction_set == kMips
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|| instruction_set == kMips64
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|| instruction_set == kX86
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|| instruction_set == kX86_64;
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}
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// Read barrier are supported on ARM, ARM64, x86 and x86-64 at the moment.
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// TODO: Add support for other architectures and remove this function
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static bool InstructionSetSupportsReadBarrier(InstructionSet instruction_set) {
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return instruction_set == kArm64
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|| instruction_set == kThumb2
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|| instruction_set == kX86
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|| instruction_set == kX86_64;
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}
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static void RunOptimizations(HOptimization* optimizations[],
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size_t length,
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PassObserver* pass_observer) {
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for (size_t i = 0; i < length; ++i) {
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PassScope scope(optimizations[i]->GetPassName(), pass_observer);
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optimizations[i]->Run();
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}
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}
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static void MaybeRunInliner(HGraph* graph,
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CodeGenerator* codegen,
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CompilerDriver* driver,
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OptimizingCompilerStats* stats,
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const DexCompilationUnit& dex_compilation_unit,
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PassObserver* pass_observer,
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StackHandleScopeCollection* handles) {
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const CompilerOptions& compiler_options = driver->GetCompilerOptions();
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bool should_inline = (compiler_options.GetInlineDepthLimit() > 0)
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&& (compiler_options.GetInlineMaxCodeUnits() > 0);
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if (!should_inline) {
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return;
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}
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size_t number_of_dex_registers = dex_compilation_unit.GetCodeItem()->registers_size_;
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HInliner* inliner = new (graph->GetArena()) HInliner(
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graph,
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graph,
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codegen,
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dex_compilation_unit,
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dex_compilation_unit,
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driver,
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handles,
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stats,
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number_of_dex_registers,
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/* depth */ 0);
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HOptimization* optimizations[] = { inliner };
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RunOptimizations(optimizations, arraysize(optimizations), pass_observer);
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}
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static void RunArchOptimizations(InstructionSet instruction_set,
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HGraph* graph,
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CodeGenerator* codegen,
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OptimizingCompilerStats* stats,
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PassObserver* pass_observer) {
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ArenaAllocator* arena = graph->GetArena();
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switch (instruction_set) {
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#ifdef ART_ENABLE_CODEGEN_arm
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case kThumb2:
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case kArm: {
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arm::DexCacheArrayFixups* fixups = new (arena) arm::DexCacheArrayFixups(graph, stats);
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arm::InstructionSimplifierArm* simplifier =
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new (arena) arm::InstructionSimplifierArm(graph, stats);
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HOptimization* arm_optimizations[] = {
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simplifier,
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fixups
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};
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RunOptimizations(arm_optimizations, arraysize(arm_optimizations), pass_observer);
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break;
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}
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#endif
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#ifdef ART_ENABLE_CODEGEN_arm64
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case kArm64: {
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arm64::InstructionSimplifierArm64* simplifier =
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new (arena) arm64::InstructionSimplifierArm64(graph, stats);
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SideEffectsAnalysis* side_effects = new (arena) SideEffectsAnalysis(graph);
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GVNOptimization* gvn = new (arena) GVNOptimization(graph, *side_effects, "GVN_after_arch");
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HOptimization* arm64_optimizations[] = {
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simplifier,
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side_effects,
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gvn
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};
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RunOptimizations(arm64_optimizations, arraysize(arm64_optimizations), pass_observer);
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break;
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}
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#endif
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#ifdef ART_ENABLE_CODEGEN_x86
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case kX86: {
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x86::PcRelativeFixups* pc_relative_fixups =
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new (arena) x86::PcRelativeFixups(graph, codegen, stats);
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HOptimization* x86_optimizations[] = {
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pc_relative_fixups
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};
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RunOptimizations(x86_optimizations, arraysize(x86_optimizations), pass_observer);
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break;
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}
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#endif
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default:
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break;
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}
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}
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NO_INLINE // Avoid increasing caller's frame size by large stack-allocated objects.
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static void AllocateRegisters(HGraph* graph,
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CodeGenerator* codegen,
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PassObserver* pass_observer) {
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{
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PassScope scope(PrepareForRegisterAllocation::kPrepareForRegisterAllocationPassName,
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pass_observer);
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PrepareForRegisterAllocation(graph).Run();
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}
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SsaLivenessAnalysis liveness(graph, codegen);
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{
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PassScope scope(SsaLivenessAnalysis::kLivenessPassName, pass_observer);
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liveness.Analyze();
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}
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{
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PassScope scope(RegisterAllocator::kRegisterAllocatorPassName, pass_observer);
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RegisterAllocator(graph->GetArena(), codegen, liveness).AllocateRegisters();
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}
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}
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static void RunOptimizations(HGraph* graph,
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CodeGenerator* codegen,
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CompilerDriver* driver,
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OptimizingCompilerStats* stats,
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const DexCompilationUnit& dex_compilation_unit,
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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);
|
|
HSelectGenerator* select_generator = new (arena) HSelectGenerator(graph, stats);
|
|
HConstantFolding* fold2 = new (arena) HConstantFolding(graph, "constant_folding_after_inlining");
|
|
HConstantFolding* fold3 = new (arena) HConstantFolding(graph, "constant_folding_after_bce");
|
|
SideEffectsAnalysis* side_effects = new (arena) SideEffectsAnalysis(graph);
|
|
GVNOptimization* gvn = new (arena) GVNOptimization(graph, *side_effects);
|
|
LICM* licm = new (arena) LICM(graph, *side_effects, stats);
|
|
LoadStoreElimination* lse = new (arena) LoadStoreElimination(graph, *side_effects);
|
|
HInductionVarAnalysis* induction = new (arena) HInductionVarAnalysis(graph);
|
|
BoundsCheckElimination* bce = new (arena) BoundsCheckElimination(graph, *side_effects, induction);
|
|
HSharpening* sharpening = new (arena) HSharpening(graph, codegen, dex_compilation_unit, driver);
|
|
InstructionSimplifier* simplify2 = new (arena) InstructionSimplifier(
|
|
graph, stats, "instruction_simplifier_after_bce");
|
|
InstructionSimplifier* simplify3 = new (arena) InstructionSimplifier(
|
|
graph, stats, "instruction_simplifier_before_codegen");
|
|
IntrinsicsRecognizer* intrinsics = new (arena) IntrinsicsRecognizer(graph, driver, stats);
|
|
|
|
HOptimization* optimizations1[] = {
|
|
intrinsics,
|
|
sharpening,
|
|
fold1,
|
|
simplify1,
|
|
dce1,
|
|
};
|
|
RunOptimizations(optimizations1, arraysize(optimizations1), pass_observer);
|
|
|
|
MaybeRunInliner(graph, codegen, driver, stats, dex_compilation_unit, pass_observer, handles);
|
|
|
|
HOptimization* optimizations2[] = {
|
|
// SelectGenerator depends on the InstructionSimplifier removing
|
|
// redundant suspend checks to recognize empty blocks.
|
|
select_generator,
|
|
fold2, // TODO: if we don't inline we can also skip fold2.
|
|
side_effects,
|
|
gvn,
|
|
licm,
|
|
induction,
|
|
bce,
|
|
fold3, // evaluates code generated by dynamic bce
|
|
simplify2,
|
|
lse,
|
|
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.
|
|
simplify3,
|
|
};
|
|
RunOptimizations(optimizations2, arraysize(optimizations2), pass_observer);
|
|
|
|
RunArchOptimizations(driver->GetInstructionSet(), graph, codegen, stats, pass_observer);
|
|
AllocateRegisters(graph, codegen, pass_observer);
|
|
}
|
|
|
|
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::Emit(ArenaAllocator* arena,
|
|
CodeVectorAllocator* code_allocator,
|
|
CodeGenerator* codegen,
|
|
CompilerDriver* compiler_driver,
|
|
const DexFile::CodeItem* code_item) const {
|
|
ArenaVector<LinkerPatch> linker_patches = EmitAndSortLinkerPatches(codegen);
|
|
ArenaVector<uint8_t> stack_map(arena->Adapter(kArenaAllocStackMaps));
|
|
stack_map.resize(codegen->ComputeStackMapsSize());
|
|
codegen->BuildStackMaps(MemoryRegion(stack_map.data(), stack_map.size()), *code_item);
|
|
|
|
CompiledMethod* compiled_method = CompiledMethod::SwapAllocCompiledMethod(
|
|
compiler_driver,
|
|
codegen->GetInstructionSet(),
|
|
ArrayRef<const uint8_t>(code_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(),
|
|
ArrayRef<const SrcMapElem>(),
|
|
ArrayRef<const uint8_t>(stack_map),
|
|
ArrayRef<const uint8_t>(*codegen->GetAssembler()->cfi().data()),
|
|
ArrayRef<const LinkerPatch>(linker_patches));
|
|
|
|
return compiled_method;
|
|
}
|
|
|
|
CodeGenerator* OptimizingCompiler::TryCompile(ArenaAllocator* arena,
|
|
CodeVectorAllocator* code_allocator,
|
|
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,
|
|
Handle<mirror::DexCache> dex_cache,
|
|
ArtMethod* method,
|
|
bool osr) const {
|
|
MaybeRecordStat(MethodCompilationStat::kAttemptCompilation);
|
|
CompilerDriver* compiler_driver = GetCompilerDriver();
|
|
InstructionSet instruction_set = compiler_driver->GetInstructionSet();
|
|
|
|
// Always use the Thumb-2 assembler: some runtime functionality
|
|
// (like implicit stack overflow checks) assume Thumb-2.
|
|
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;
|
|
}
|
|
|
|
// When read barriers are enabled, do not attempt to compile for
|
|
// instruction sets that have no read barrier support.
|
|
if (kEmitCompilerReadBarrier && !InstructionSetSupportsReadBarrier(instruction_set)) {
|
|
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() == CompilerFilter::kSpace)
|
|
&& (code_item->insns_size_in_code_units_ > kSpaceFilterOptimizingThreshold)) {
|
|
MaybeRecordStat(MethodCompilationStat::kNotCompiledSpaceFilter);
|
|
return nullptr;
|
|
}
|
|
|
|
DexCompilationUnit dex_compilation_unit(
|
|
class_loader,
|
|
Runtime::Current()->GetClassLinker(),
|
|
dex_file,
|
|
code_item,
|
|
class_def_idx,
|
|
method_idx,
|
|
access_flags,
|
|
/* verified_method */ nullptr,
|
|
dex_cache);
|
|
|
|
bool requires_barrier = dex_compilation_unit.IsConstructor()
|
|
&& compiler_driver->RequiresConstructorBarrier(Thread::Current(),
|
|
dex_compilation_unit.GetDexFile(),
|
|
dex_compilation_unit.GetClassDefIndex());
|
|
|
|
HGraph* graph = new (arena) HGraph(
|
|
arena,
|
|
dex_file,
|
|
method_idx,
|
|
requires_barrier,
|
|
compiler_driver->GetInstructionSet(),
|
|
kInvalidInvokeType,
|
|
compiler_driver->GetCompilerOptions().GetDebuggable(),
|
|
osr);
|
|
|
|
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, 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.
|
|
DCHECK(Runtime::Current()->IsAotCompiler() || method != nullptr);
|
|
if (method != nullptr) {
|
|
graph->SetArtMethod(method);
|
|
ScopedObjectAccess soa(Thread::Current());
|
|
interpreter_metadata = method->GetQuickenedInfo();
|
|
uint16_t 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(
|
|
CodeGenerator::Create(graph,
|
|
instruction_set,
|
|
*compiler_driver->GetInstructionSetFeatures(),
|
|
compiler_driver->GetCompilerOptions(),
|
|
compilation_stats_.get()));
|
|
if (codegen.get() == nullptr) {
|
|
MaybeRecordStat(MethodCompilationStat::kNotCompiledNoCodegen);
|
|
return nullptr;
|
|
}
|
|
codegen->GetAssembler()->cfi().SetEnabled(
|
|
compiler_driver->GetCompilerOptions().GenerateAnyDebugInfo());
|
|
|
|
PassObserver pass_observer(graph,
|
|
codegen.get(),
|
|
visualizer_output_.get(),
|
|
compiler_driver);
|
|
|
|
VLOG(compiler) << "Building " << pass_observer.GetMethodName();
|
|
|
|
{
|
|
ScopedObjectAccess soa(Thread::Current());
|
|
StackHandleScopeCollection handles(soa.Self());
|
|
// Do not hold `mutator_lock_` between optimizations.
|
|
ScopedThreadSuspension sts(soa.Self(), kNative);
|
|
|
|
{
|
|
PassScope scope(HGraphBuilder::kBuilderPassName, &pass_observer);
|
|
HGraphBuilder builder(graph,
|
|
&dex_compilation_unit,
|
|
&dex_compilation_unit,
|
|
&dex_file,
|
|
*code_item,
|
|
compiler_driver,
|
|
compilation_stats_.get(),
|
|
interpreter_metadata,
|
|
dex_cache,
|
|
&handles);
|
|
GraphAnalysisResult result = builder.BuildGraph();
|
|
if (result != kAnalysisSuccess) {
|
|
switch (result) {
|
|
case kAnalysisSkipped:
|
|
MaybeRecordStat(MethodCompilationStat::kNotCompiledSkipped);
|
|
break;
|
|
case kAnalysisInvalidBytecode:
|
|
MaybeRecordStat(MethodCompilationStat::kNotCompiledInvalidBytecode);
|
|
break;
|
|
case kAnalysisFailThrowCatchLoop:
|
|
MaybeRecordStat(MethodCompilationStat::kNotCompiledThrowCatchLoop);
|
|
break;
|
|
case kAnalysisFailAmbiguousArrayOp:
|
|
MaybeRecordStat(MethodCompilationStat::kNotCompiledAmbiguousArrayOp);
|
|
break;
|
|
case kAnalysisSuccess:
|
|
UNREACHABLE();
|
|
}
|
|
pass_observer.SetGraphInBadState();
|
|
return nullptr;
|
|
}
|
|
}
|
|
|
|
RunOptimizations(graph,
|
|
codegen.get(),
|
|
compiler_driver,
|
|
compilation_stats_.get(),
|
|
dex_compilation_unit,
|
|
&pass_observer,
|
|
&handles);
|
|
|
|
codegen->Compile(code_allocator);
|
|
pass_observer.DumpDisassembly();
|
|
}
|
|
|
|
return codegen.release();
|
|
}
|
|
|
|
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,
|
|
Handle<mirror::DexCache> dex_cache) const {
|
|
CompilerDriver* compiler_driver = GetCompilerDriver();
|
|
CompiledMethod* method = nullptr;
|
|
DCHECK(Runtime::Current()->IsAotCompiler());
|
|
const VerifiedMethod* verified_method = compiler_driver->GetVerifiedMethod(&dex_file, method_idx);
|
|
DCHECK(!verified_method->HasRuntimeThrow());
|
|
if (compiler_driver->IsMethodVerifiedWithoutFailures(method_idx, class_def_idx, dex_file)
|
|
|| verifier::MethodVerifier::CanCompilerHandleVerificationFailure(
|
|
verified_method->GetEncounteredVerificationFailures())) {
|
|
ArenaAllocator arena(Runtime::Current()->GetArenaPool());
|
|
CodeVectorAllocator code_allocator(&arena);
|
|
std::unique_ptr<CodeGenerator> codegen(
|
|
TryCompile(&arena,
|
|
&code_allocator,
|
|
code_item,
|
|
access_flags,
|
|
invoke_type,
|
|
class_def_idx,
|
|
method_idx,
|
|
jclass_loader,
|
|
dex_file,
|
|
dex_cache,
|
|
nullptr,
|
|
/* osr */ false));
|
|
if (codegen.get() != nullptr) {
|
|
MaybeRecordStat(MethodCompilationStat::kCompiled);
|
|
method = Emit(&arena, &code_allocator, codegen.get(), compiler_driver, code_item);
|
|
|
|
if (kArenaAllocatorCountAllocations) {
|
|
if (arena.BytesAllocated() > kArenaAllocatorMemoryReportThreshold) {
|
|
MemStats mem_stats(arena.GetMemStats());
|
|
LOG(INFO) << PrettyMethod(method_idx, dex_file) << " " << Dumpable<MemStats>(mem_stats);
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
if (compiler_driver->GetCompilerOptions().VerifyAtRuntime()) {
|
|
MaybeRecordStat(MethodCompilationStat::kNotCompiledVerifyAtRuntime);
|
|
} else {
|
|
MaybeRecordStat(MethodCompilationStat::kNotCompiledVerificationError);
|
|
}
|
|
}
|
|
|
|
if (kIsDebugBuild &&
|
|
IsCompilingWithCoreImage() &&
|
|
IsInstructionSetSupported(compiler_driver->GetInstructionSet()) &&
|
|
(!kEmitCompilerReadBarrier ||
|
|
InstructionSetSupportsReadBarrier(compiler_driver->GetInstructionSet()))) {
|
|
// For testing purposes, we put a special marker on method names
|
|
// that should be compiled with this compiler (when the the
|
|
// instruction set is supported -- and has support for read
|
|
// barriers, if they are enabled). This makes sure we're not
|
|
// regressing.
|
|
std::string method_name = PrettyMethod(method_idx, dex_file);
|
|
bool shouldCompile = method_name.find("$opt$") != std::string::npos;
|
|
DCHECK((method != nullptr) || !shouldCompile) << "Didn't compile " << method_name;
|
|
}
|
|
|
|
return method;
|
|
}
|
|
|
|
Compiler* CreateOptimizingCompiler(CompilerDriver* driver) {
|
|
return new OptimizingCompiler(driver);
|
|
}
|
|
|
|
bool IsCompilingWithCoreImage() {
|
|
const std::string& image = Runtime::Current()->GetImageLocation();
|
|
// TODO: This is under-approximating...
|
|
if (EndsWith(image, "core.art") || EndsWith(image, "core-optimizing.art")) {
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool OptimizingCompiler::JitCompile(Thread* self,
|
|
jit::JitCodeCache* code_cache,
|
|
ArtMethod* method,
|
|
bool osr) {
|
|
StackHandleScope<2> hs(self);
|
|
Handle<mirror::ClassLoader> class_loader(hs.NewHandle(
|
|
method->GetDeclaringClass()->GetClassLoader()));
|
|
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());
|
|
const uint32_t method_idx = method->GetDexMethodIndex();
|
|
const uint32_t access_flags = method->GetAccessFlags();
|
|
const InvokeType invoke_type = method->GetInvokeType();
|
|
|
|
ArenaAllocator arena(Runtime::Current()->GetJitArenaPool());
|
|
CodeVectorAllocator code_allocator(&arena);
|
|
std::unique_ptr<CodeGenerator> codegen;
|
|
{
|
|
// Go to native so that we don't block GC during compilation.
|
|
ScopedThreadSuspension sts(self, kNative);
|
|
codegen.reset(
|
|
TryCompile(&arena,
|
|
&code_allocator,
|
|
code_item,
|
|
access_flags,
|
|
invoke_type,
|
|
class_def_idx,
|
|
method_idx,
|
|
jclass_loader,
|
|
*dex_file,
|
|
dex_cache,
|
|
method,
|
|
osr));
|
|
if (codegen.get() == nullptr) {
|
|
return false;
|
|
}
|
|
|
|
if (kArenaAllocatorCountAllocations) {
|
|
if (arena.BytesAllocated() > kArenaAllocatorMemoryReportThreshold) {
|
|
MemStats mem_stats(arena.GetMemStats());
|
|
LOG(INFO) << PrettyMethod(method_idx, *dex_file) << " " << Dumpable<MemStats>(mem_stats);
|
|
}
|
|
}
|
|
}
|
|
|
|
size_t stack_map_size = codegen->ComputeStackMapsSize();
|
|
uint8_t* stack_map_data = code_cache->ReserveData(self, stack_map_size, method);
|
|
if (stack_map_data == nullptr) {
|
|
return false;
|
|
}
|
|
MaybeRecordStat(MethodCompilationStat::kCompiled);
|
|
codegen->BuildStackMaps(MemoryRegion(stack_map_data, stack_map_size), *code_item);
|
|
const void* code = code_cache->CommitCode(
|
|
self,
|
|
method,
|
|
stack_map_data,
|
|
codegen->HasEmptyFrame() ? 0 : codegen->GetFrameSize(),
|
|
codegen->GetCoreSpillMask(),
|
|
codegen->GetFpuSpillMask(),
|
|
code_allocator.GetMemory().data(),
|
|
code_allocator.GetSize(),
|
|
osr);
|
|
|
|
if (code == nullptr) {
|
|
code_cache->ClearData(self, stack_map_data);
|
|
return false;
|
|
}
|
|
|
|
const CompilerOptions& compiler_options = GetCompilerDriver()->GetCompilerOptions();
|
|
if (compiler_options.GetGenerateDebugInfo()) {
|
|
const auto* method_header = reinterpret_cast<const OatQuickMethodHeader*>(code);
|
|
const uintptr_t code_address = reinterpret_cast<uintptr_t>(method_header->GetCode());
|
|
debug::MethodDebugInfo info = debug::MethodDebugInfo();
|
|
info.trampoline_name = nullptr;
|
|
info.dex_file = dex_file;
|
|
info.class_def_index = class_def_idx;
|
|
info.dex_method_index = method_idx;
|
|
info.access_flags = access_flags;
|
|
info.code_item = code_item;
|
|
info.isa = codegen->GetInstructionSet();
|
|
info.deduped = false;
|
|
info.is_native_debuggable = compiler_options.GetNativeDebuggable();
|
|
info.is_optimized = true;
|
|
info.is_code_address_text_relative = false;
|
|
info.code_address = code_address;
|
|
info.code_size = code_allocator.GetSize();
|
|
info.frame_size_in_bytes = method_header->GetFrameSizeInBytes();
|
|
info.code_info = stack_map_size == 0 ? nullptr : stack_map_data;
|
|
info.cfi = ArrayRef<const uint8_t>(*codegen->GetAssembler()->cfi().data());
|
|
std::vector<uint8_t> elf_file = debug::WriteDebugElfFileForMethods(
|
|
GetCompilerDriver()->GetInstructionSet(),
|
|
GetCompilerDriver()->GetInstructionSetFeatures(),
|
|
ArrayRef<const debug::MethodDebugInfo>(&info, 1));
|
|
CreateJITCodeEntryForAddress(code_address, std::move(elf_file));
|
|
}
|
|
|
|
Runtime::Current()->GetJit()->AddMemoryUsage(method, arena.BytesUsed());
|
|
|
|
return true;
|
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}
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} // namespace art
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