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/*
* Copyright (C) 2011 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 "DFGDriver.h"
#if ENABLE(DFG_JIT)
#include "DFGByteCodeParser.h"
#include "DFGCFAPhase.h"
#include "DFGCSEPhase.h"
#include "DFGFixupPhase.h"
#include "DFGJITCompiler.h"
#include "DFGPredictionPropagationPhase.h"
#include "DFGRedundantPhiEliminationPhase.h"
#include "DFGVirtualRegisterAllocationPhase.h"
namespace JSC { namespace DFG {
enum CompileMode { CompileFunction, CompileOther };
inline bool compile(CompileMode compileMode, JSGlobalData& globalData, CodeBlock* codeBlock, JITCode& jitCode, MacroAssemblerCodePtr* jitCodeWithArityCheck)
{
SamplingRegion samplingRegion("DFG Compilation (Driver)");
ASSERT(codeBlock);
ASSERT(codeBlock->alternative());
ASSERT(codeBlock->alternative()->getJITType() == JITCode::BaselineJIT);
#if DFG_ENABLE(DEBUG_VERBOSE)
dataLog("DFG compiling code block %p(%p), number of instructions = %u.\n", codeBlock, codeBlock->alternative(), codeBlock->instructionCount());
#endif
Graph dfg(globalData, codeBlock);
if (!parse(dfg))
return false;
if (compileMode == CompileFunction)
dfg.predictArgumentTypes();
// By this point the DFG bytecode parser will have potentially mutated various tables
// in the CodeBlock. This is a good time to perform an early shrink, which is more
// powerful than a late one. It's safe to do so because we haven't generated any code
// that references any of the tables directly, yet.
codeBlock->shrinkToFit(CodeBlock::EarlyShrink);
performRedundantPhiElimination(dfg);
performPredictionPropagation(dfg);
performFixup(dfg);
performCSE(dfg);
performVirtualRegisterAllocation(dfg);
performCFA(dfg);
#if DFG_ENABLE(DEBUG_VERBOSE)
dataLog("Graph after optimization:\n");
dfg.dump();
#endif
JITCompiler dataFlowJIT(dfg);
bool result;
if (compileMode == CompileFunction) {
ASSERT(jitCodeWithArityCheck);
result = dataFlowJIT.compileFunction(jitCode, *jitCodeWithArityCheck);
} else {
ASSERT(compileMode == CompileOther);
ASSERT(!jitCodeWithArityCheck);
result = dataFlowJIT.compile(jitCode);
}
return result;
}
bool tryCompile(JSGlobalData& globalData, CodeBlock* codeBlock, JITCode& jitCode)
{
return compile(CompileOther, globalData, codeBlock, jitCode, 0);
}
bool tryCompileFunction(JSGlobalData& globalData, CodeBlock* codeBlock, JITCode& jitCode, MacroAssemblerCodePtr& jitCodeWithArityCheck)
{
return compile(CompileFunction, globalData, codeBlock, jitCode, &jitCodeWithArityCheck);
}
} } // namespace JSC::DFG
#endif // ENABLE(DFG_JIT)
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