108 lines
3.7 KiB
C++
108 lines
3.7 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 "builder.h"
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#include "art_field-inl.h"
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#include "base/arena_bit_vector.h"
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#include "base/bit_vector-inl.h"
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#include "base/logging.h"
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#include "dex/verified_method.h"
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#include "driver/compiler_options.h"
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#include "mirror/class_loader.h"
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#include "mirror/dex_cache.h"
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#include "nodes.h"
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#include "primitive.h"
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#include "thread.h"
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#include "utils/dex_cache_arrays_layout-inl.h"
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namespace art {
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void HGraphBuilder::MaybeRecordStat(MethodCompilationStat compilation_stat) {
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if (compilation_stats_ != nullptr) {
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compilation_stats_->RecordStat(compilation_stat);
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}
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}
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bool HGraphBuilder::SkipCompilation(size_t number_of_branches) {
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if (compiler_driver_ == nullptr) {
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// Note that the compiler driver is null when unit testing.
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return false;
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}
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const CompilerOptions& compiler_options = compiler_driver_->GetCompilerOptions();
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CompilerFilter::Filter compiler_filter = compiler_options.GetCompilerFilter();
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if (compiler_filter == CompilerFilter::kEverything) {
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return false;
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}
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if (compiler_options.IsHugeMethod(code_item_.insns_size_in_code_units_)) {
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VLOG(compiler) << "Skip compilation of huge method "
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<< dex_file_->PrettyMethod(dex_compilation_unit_->GetDexMethodIndex())
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<< ": " << code_item_.insns_size_in_code_units_ << " code units";
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MaybeRecordStat(MethodCompilationStat::kNotCompiledHugeMethod);
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return true;
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}
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// If it's large and contains no branches, it's likely to be machine generated initialization.
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if (compiler_options.IsLargeMethod(code_item_.insns_size_in_code_units_)
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&& (number_of_branches == 0)) {
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VLOG(compiler) << "Skip compilation of large method with no branch "
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<< dex_file_->PrettyMethod(dex_compilation_unit_->GetDexMethodIndex())
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<< ": " << code_item_.insns_size_in_code_units_ << " code units";
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MaybeRecordStat(MethodCompilationStat::kNotCompiledLargeMethodNoBranches);
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return true;
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}
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return false;
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}
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GraphAnalysisResult HGraphBuilder::BuildGraph() {
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DCHECK(graph_->GetBlocks().empty());
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graph_->SetNumberOfVRegs(code_item_.registers_size_);
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graph_->SetNumberOfInVRegs(code_item_.ins_size_);
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graph_->SetMaximumNumberOfOutVRegs(code_item_.outs_size_);
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graph_->SetHasTryCatch(code_item_.tries_size_ != 0);
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// 1) Create basic blocks and link them together. Basic blocks are left
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// unpopulated with the exception of synthetic blocks, e.g. HTryBoundaries.
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if (!block_builder_.Build()) {
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return kAnalysisInvalidBytecode;
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}
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// 2) Decide whether to skip this method based on its code size and number
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// of branches.
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if (SkipCompilation(block_builder_.GetNumberOfBranches())) {
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return kAnalysisSkipped;
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}
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// 3) Build the dominator tree and fill in loop and try/catch metadata.
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GraphAnalysisResult result = graph_->BuildDominatorTree();
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if (result != kAnalysisSuccess) {
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return result;
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}
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// 4) Populate basic blocks with instructions.
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if (!instruction_builder_.Build()) {
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return kAnalysisInvalidBytecode;
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}
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// 5) Type the graph and eliminate dead/redundant phis.
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return ssa_builder_.BuildSsa();
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}
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} // namespace art
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