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/*
* 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 <fstream>
#include <stdint.h>
#include "builder.h"
#include "code_generator.h"
#include "compilers.h"
#include "driver/compiler_driver.h"
#include "driver/dex_compilation_unit.h"
#include "graph_visualizer.h"
#include "nodes.h"
#include "register_allocator.h"
#include "ssa_liveness_analysis.h"
#include "utils/arena_allocator.h"
namespace art {
/**
* Used by the code generator, to allocate the code in a vector.
*/
class CodeVectorAllocator FINAL : public CodeAllocator {
public:
CodeVectorAllocator() { }
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);
};
/**
* If set to true, generates a file suitable for the c1visualizer tool and IRHydra.
*/
static bool kIsVisualizerEnabled = false;
/**
* Filter to apply to the visualizer. Methods whose name contain that filter will
* be in the file.
*/
static const char* kStringFilter = "";
OptimizingCompiler::OptimizingCompiler(CompilerDriver* driver) : QuickCompiler(driver) {
if (kIsVisualizerEnabled) {
visualizer_output_.reset(new std::ofstream("art.cfg"));
}
}
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 {
DexCompilationUnit dex_compilation_unit(
nullptr, class_loader, art::Runtime::Current()->GetClassLinker(), dex_file, code_item,
class_def_idx, method_idx, access_flags,
GetCompilerDriver()->GetVerifiedMethod(&dex_file, method_idx));
// 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 = dex_compilation_unit.GetSymbol().find("00024opt_00024") != std::string::npos;
ArenaPool pool;
ArenaAllocator arena(&pool);
HGraphBuilder builder(&arena, &dex_compilation_unit, &dex_file);
HGraph* graph = builder.BuildGraph(*code_item);
if (graph == nullptr) {
if (shouldCompile) {
LOG(FATAL) << "Could not build graph in optimizing compiler";
}
return nullptr;
}
InstructionSet instruction_set = GetCompilerDriver()->GetInstructionSet();
// The optimizing compiler currently does not have a Thumb2 assembler.
if (instruction_set == kThumb2) {
instruction_set = kArm;
}
CodeGenerator* codegen = CodeGenerator::Create(&arena, graph, instruction_set);
if (codegen == nullptr) {
if (shouldCompile) {
LOG(FATAL) << "Could not find code generator for optimizing compiler";
}
return nullptr;
}
HGraphVisualizer visualizer(
visualizer_output_.get(), graph, kStringFilter, *codegen, dex_compilation_unit);
visualizer.DumpGraph("builder");
CodeVectorAllocator allocator;
codegen->Compile(&allocator);
std::vector<uint8_t> mapping_table;
codegen->BuildMappingTable(&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);
// Run these phases to get some test coverage.
graph->BuildDominatorTree();
graph->TransformToSSA();
visualizer.DumpGraph("ssa");
graph->FindNaturalLoops();
SsaLivenessAnalysis liveness(*graph, codegen);
liveness.Analyze();
visualizer.DumpGraph("liveness");
RegisterAllocator(graph->GetArena(), *codegen).AllocateRegisters(liveness);
visualizer.DumpGraph("register");
return new CompiledMethod(GetCompilerDriver(),
instruction_set,
allocator.GetMemory(),
codegen->GetFrameSize(),
codegen->GetCoreSpillMask(),
0, /* FPR spill mask, unused */
mapping_table,
vmap_table,
gc_map,
nullptr);
}
} // namespace art
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