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/*
* Copyright (C) 2012 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 "compiler_llvm.h"
#include "compilation_unit.h"
#include "compiler.h"
#include "ir_builder.h"
#include "jni_compiler.h"
#include "method_compiler.h"
#include "oat_compilation_unit.h"
#include "upcall_compiler.h"
#include <llvm/Support/TargetSelect.h>
#include <llvm/Support/Threading.h>
namespace {
pthread_once_t llvm_initialized = PTHREAD_ONCE_INIT;
void InitializeLLVM() {
// Initialize LLVM target, MC subsystem, asm printer, and asm parser
llvm::InitializeAllTargets();
llvm::InitializeAllTargetMCs();
llvm::InitializeAllAsmPrinters();
llvm::InitializeAllAsmParsers();
// TODO: Maybe we don't have to initialize "all" targets.
// Initialize LLVM internal data structure for multithreading
llvm::llvm_start_multithreaded();
}
} // anonymous namespace
namespace art {
namespace compiler_llvm {
llvm::Module* makeLLVMModuleContents(llvm::Module* module);
CompilerLLVM::CompilerLLVM(Compiler* compiler, InstructionSet insn_set)
: compiler_(compiler), compiler_lock_("llvm_compiler_lock"),
insn_set_(insn_set), cunit_counter_(0) {
// Initialize LLVM libraries
pthread_once(&llvm_initialized, InitializeLLVM);
}
CompilerLLVM::~CompilerLLVM() {
DCHECK(cunit_.get() == NULL);
}
void CompilerLLVM::EnsureCompilationUnit() {
MutexLock GUARD(compiler_lock_);
DCHECK_NE(llvm_initialized, PTHREAD_ONCE_INIT);
if (cunit_.get() == NULL) {
cunit_.reset(new CompilationUnit(insn_set_));
}
}
void CompilerLLVM::MaterializeEveryCompilationUnit() {
if (cunit_.get() != NULL) {
MaterializeCompilationUnit();
}
}
void CompilerLLVM::MaterializeCompilationUnitSafePoint() {
if (cunit_->IsMaterializeThresholdReached()) {
MaterializeCompilationUnit();
}
}
void CompilerLLVM::MaterializeCompilationUnit() {
MutexLock GUARD(compiler_lock_);
cunit_->SetElfFileName(StringPrintf("%s-%u", elf_filename_.c_str(),
cunit_counter_));
// Write the translated bitcode for debugging
if (!bitcode_filename_.empty()) {
cunit_->SetBitcodeFileName(StringPrintf("%s-%u", bitcode_filename_.c_str(),
cunit_counter_));
cunit_->WriteBitcodeToFile();
}
// Materialize the llvm::Module into ELF object file
cunit_->Materialize();
// Increase compilation unit counter
++cunit_counter_;
// Delete the compilation unit
cunit_.reset(NULL);
}
CompiledMethod* CompilerLLVM::CompileDexMethod(OatCompilationUnit* oat_compilation_unit) {
MutexLock GUARD(compiler_lock_);
EnsureCompilationUnit();
UniquePtr<MethodCompiler> method_compiler(
new MethodCompiler(cunit_.get(), compiler_, oat_compilation_unit));
CompiledMethod* result = method_compiler->Compile();
MaterializeCompilationUnitSafePoint();
return result;
}
CompiledMethod* CompilerLLVM::CompileNativeMethod(OatCompilationUnit* oat_compilation_unit) {
MutexLock GUARD(compiler_lock_);
EnsureCompilationUnit();
UniquePtr<JniCompiler> jni_compiler(
new JniCompiler(cunit_.get(), *compiler_, oat_compilation_unit));
CompiledMethod* result = jni_compiler->Compile();
MaterializeCompilationUnitSafePoint();
return result;
}
CompiledInvokeStub* CompilerLLVM::CreateInvokeStub(bool is_static,
char const *shorty) {
MutexLock GUARD(compiler_lock_);
EnsureCompilationUnit();
UniquePtr<UpcallCompiler> upcall_compiler(
new UpcallCompiler(cunit_.get(), *compiler_));
CompiledInvokeStub* result = upcall_compiler->CreateStub(is_static, shorty);
MaterializeCompilationUnitSafePoint();
return result;
}
} // namespace compiler_llvm
} // namespace art
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