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FTLCompile.cpp
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executable file
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/*
* Copyright (C) 2013 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "FTLCompile.h"
#if ENABLE(FTL_JIT)
#include "CodeBlockWithJITType.h"
#include "DFGCCallHelpers.h"
#include "DFGCommon.h"
#include "Disassembler.h"
#include "FTLJITCode.h"
#include "JITStubs.h"
#include "LinkBuffer.h"
#include <wtf/LLVMHeaders.h>
namespace JSC { namespace FTL {
using namespace DFG;
static uint8_t* mmAllocateCodeSection(
void* opaqueState, uintptr_t size, unsigned alignment, unsigned sectionID)
{
UNUSED_PARAM(sectionID);
State& state = *static_cast<State*>(opaqueState);
RELEASE_ASSERT(alignment <= jitAllocationGranule);
RefPtr<ExecutableMemoryHandle> result =
state.graph.m_vm.executableAllocator.allocate(
state.graph.m_vm, size, state.graph.m_codeBlock, JITCompilationMustSucceed);
state.jitCode->addHandle(result);
return static_cast<uint8_t*>(result->start());
}
static uint8_t* mmAllocateDataSection(
void* opaqueState, uintptr_t size, unsigned alignment, unsigned sectionID,
LLVMBool isReadOnly)
{
// FIXME: fourthTier: FTL memory allocator should be able to allocate data
// sections in non-executable memory.
// https://bugs.webkit.org/show_bug.cgi?id=116189
UNUSED_PARAM(isReadOnly);
return mmAllocateCodeSection(opaqueState, size, alignment, sectionID);
}
static LLVMBool mmApplyPermissions(void*, char**)
{
return false;
}
static void mmDestroy(void*)
{
}
void compile(State& state)
{
char* error = 0;
LLVMMCJITCompilerOptions options;
LLVMInitializeMCJITCompilerOptions(&options, sizeof(options));
options.OptLevel = Options::llvmBackendOptimizationLevel();
options.NoFramePointerElim = true;
if (Options::useLLVMSmallCodeModel())
options.CodeModel = LLVMCodeModelSmall;
options.EnableFastISel = Options::enableLLVMFastISel();
options.MCJMM = LLVMCreateSimpleMCJITMemoryManager(
&state, mmAllocateCodeSection, mmAllocateDataSection, mmApplyPermissions, mmDestroy);
LLVMExecutionEngineRef engine;
if (LLVMCreateMCJITCompilerForModule(&engine, state.module, &options, sizeof(options), &error)) {
dataLog("FATAL: Could not create LLVM execution engine: ", error, "\n");
CRASH();
}
LLVMPassManagerBuilderRef passBuilder = LLVMPassManagerBuilderCreate();
LLVMPassManagerBuilderSetOptLevel(passBuilder, Options::llvmOptimizationLevel());
LLVMPassManagerBuilderSetSizeLevel(passBuilder, Options::llvmSizeLevel());
LLVMPassManagerRef functionPasses = LLVMCreateFunctionPassManagerForModule(state.module);
LLVMPassManagerRef modulePasses = LLVMCreatePassManager();
LLVMAddTargetData(LLVMGetExecutionEngineTargetData(engine), modulePasses);
LLVMPassManagerBuilderPopulateFunctionPassManager(passBuilder, functionPasses);
LLVMPassManagerBuilderPopulateModulePassManager(passBuilder, modulePasses);
LLVMPassManagerBuilderDispose(passBuilder);
LLVMInitializeFunctionPassManager(functionPasses);
for (LValue function = LLVMGetFirstFunction(state.module); function; function = LLVMGetNextFunction(function))
LLVMRunFunctionPassManager(functionPasses, function);
LLVMFinalizeFunctionPassManager(functionPasses);
LLVMRunPassManager(modulePasses, state.module);
if (DFG::shouldShowDisassembly() || DFG::verboseCompilationEnabled())
state.dumpState("after optimization");
// FIXME: Need to add support for the case where JIT memory allocation failed.
// https://bugs.webkit.org/show_bug.cgi?id=113620
state.generatedFunction = reinterpret_cast<GeneratedFunction>(LLVMGetPointerToGlobal(engine, state.function));
LLVMDisposePassManager(functionPasses);
LLVMDisposePassManager(modulePasses);
LLVMDisposeExecutionEngine(engine);
if (shouldShowDisassembly()) {
// FIXME: fourthTier: FTL memory allocator should be able to tell us which of
// these things is actually code or data.
// https://bugs.webkit.org/show_bug.cgi?id=116189
for (unsigned i = 0; i < state.jitCode->handles().size(); ++i) {
ExecutableMemoryHandle* handle = state.jitCode->handles()[i].get();
dataLog(
"Generated LLVM code for ",
CodeBlockWithJITType(state.graph.m_codeBlock, JITCode::DFGJIT),
" #", i, ":\n");
disassemble(
MacroAssemblerCodePtr(handle->start()), handle->sizeInBytes(),
" ", WTF::dataFile(), LLVMSubset);
}
}
}
} } // namespace JSC::FTL
#endif // ENABLE(FTL_JIT)