/* * Copyright (C) 2017 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. */ #pragma once #if ENABLE(B3_JIT) #include "B3BasicBlock.h" #include "B3CFG.h" #include "B3Procedure.h" #include "B3ValueInlines.h" #include "B3Variable.h" #include "B3VariableValue.h" #include <wtf/Liveness.h> namespace JSC { namespace B3 { struct VariableLivenessAdapter { static constexpr const char* name = "VariableLiveness"; typedef B3::CFG CFG; typedef Variable* Thing; VariableLivenessAdapter(Procedure& proc) : proc(proc) { } void prepareToCompute() { } unsigned numIndices() { return proc.variables().size(); } static unsigned valueToIndex(Variable* var) { return var->index(); } Variable* indexToValue(unsigned index) { return proc.variables()[index]; } unsigned blockSize(BasicBlock* block) { return block->size(); } template<typename Func> void forEachUse(BasicBlock* block, unsigned valueBoundaryIndex, const Func& func) { // We want all of the uses that happen between valueBoundaryIndex-1 and // valueBoundaryIndex. Since the Get opcode is the only value that has a use and since // this is an early use, we only care about block[valueBoundaryIndex]. Value* value = block->get(valueBoundaryIndex); if (!value) return; if (value->opcode() != Get) return; func(value->as<VariableValue>()->variable()->index()); } template<typename Func> void forEachDef(BasicBlock* block, unsigned valueBoundaryIndex, const Func& func) { // We want all of the defs that happen between valueBoundaryIndex-1 and // valueBoundaryIndex. Since the Set opcode is the only value that has a def and since // this is an late def, we only care about block[valueBoundaryIndex - 1]. Value* value = block->get(valueBoundaryIndex - 1); if (!value) return; if (value->opcode() != Set) return; func(value->as<VariableValue>()->variable()->index()); } Procedure& proc; }; class VariableLiveness : public WTF::Liveness<VariableLivenessAdapter> { public: VariableLiveness(Procedure&); ~VariableLiveness(); }; } } // namespace JSC::B3 #endif // ENABLE(B3_JIT)