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/*
* Copyright (C) 2015-2020 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 "B3Generate.h"
#if ENABLE(B3_JIT)
#include "AirGenerate.h"
#include "B3CanonicalizePrePostIncrements.h"
#include "B3Common.h"
#include "B3DuplicateTails.h"
#include "B3EliminateCommonSubexpressions.h"
#include "B3EliminateDeadCode.h"
#include "B3FixSSA.h"
#include "B3FoldPathConstants.h"
#include "B3HoistLoopInvariantValues.h"
#include "B3InferSwitches.h"
#include "B3LegalizeMemoryOffsets.h"
#include "B3LowerInt64.h"
#include "B3LowerMacros.h"
#include "B3LowerMacrosAfterOptimizations.h"
#include "B3LowerToAir.h"
#include "B3MoveConstants.h"
#include "B3OptimizeAssociativeExpressionTrees.h"
#include "B3Procedure.h"
#include "B3ReduceDoubleToFloat.h"
#include "B3ReduceStrength.h"
#include "B3Validate.h"
#include "CompilerTimingScope.h"
namespace JSC { namespace B3 {
void prepareForGeneration(Procedure& procedure)
{
CompilerTimingScope timingScope("Total B3+Air"_s, "prepareForGeneration"_s);
generateToAir(procedure);
Air::prepareForGeneration(procedure.code());
}
void generate(Procedure& procedure, CCallHelpers& jit)
{
Air::generate(procedure.code(), jit);
}
void generateToAir(Procedure& procedure)
{
CompilerTimingScope timingScope("Total B3"_s, "generateToAir"_s);
if ((shouldDumpIR(procedure, B3Mode) || Options::dumpGraphAfterParsing()) && !shouldDumpIRAtEachPhase(B3Mode)) {
dataLog(tierName, "Initial B3:\n");
dataLog(procedure);
}
// We don't require the incoming IR to have predecessors computed.
procedure.resetReachability();
if (shouldValidateIR())
validate(procedure);
if (procedure.optLevel() >= 2) {
reduceDoubleToFloat(procedure);
reduceStrength(procedure);
if (Options::useB3HoistLoopInvariantValues())
hoistLoopInvariantValues(procedure);
if (eliminateCommonSubexpressions(procedure))
eliminateCommonSubexpressions(procedure);
eliminateDeadCode(procedure);
inferSwitches(procedure);
if (Options::useB3TailDup())
duplicateTails(procedure);
fixSSA(procedure);
foldPathConstants(procedure);
// FIXME: Add more optimizations here.
// https://bugs.webkit.org/show_bug.cgi?id=150507
} else if (procedure.optLevel() >= 1) {
// FIXME: Explore better "quick mode" optimizations.
reduceStrength(procedure);
}
// This puts the IR in quirks mode.
lowerMacros(procedure);
if (procedure.optLevel() >= 2) {
optimizeAssociativeExpressionTrees(procedure);
reduceStrength(procedure);
// FIXME: Add more optimizations here.
// https://bugs.webkit.org/show_bug.cgi?id=150507
}
#if USE(JSVALUE32_64)
lowerInt64(procedure);
#endif
lowerMacrosAfterOptimizations(procedure);
legalizeMemoryOffsets(procedure);
moveConstants(procedure);
legalizeMemoryOffsets(procedure);
eliminateDeadCode(procedure);
if (Options::useB3CanonicalizePrePostIncrements() && procedure.optLevel() >= 2)
canonicalizePrePostIncrements(procedure);
// FIXME: We should run pureCSE here to clean up some platform specific changes from the previous phases.
// https://bugs.webkit.org/show_bug.cgi?id=164873
if (shouldValidateIR())
validate(procedure);
// If we're doing super verbose dumping, the phase scope of any phase will already do a dump.
// Note that lowerToAir() acts like a phase in this regard.
if (shouldDumpIR(procedure, B3Mode) && !shouldDumpIRAtEachPhase(B3Mode)) {
dataLog("B3 after ", procedure.lastPhaseName(), ", before generation:\n");
dataLog(procedure);
}
lowerToAir(procedure);
if (shouldDumpIR(procedure, B3Mode))
procedure.setShouldDumpIR();
procedure.freeUnneededB3ValuesAfterLowering();
}
} } // namespace JSC::B3
#endif // ENABLE(B3_JIT)
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