mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
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108 lines
3.5 KiB
C++
108 lines
3.5 KiB
C++
/*
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* Copyright (C) 2017 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#if ENABLE(B3_JIT)
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#include "B3BasicBlock.h"
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#include "B3CFG.h"
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#include "B3Procedure.h"
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#include "B3ValueInlines.h"
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#include "B3Variable.h"
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#include "B3VariableValue.h"
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#include <wtf/Liveness.h>
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namespace JSC { namespace B3 {
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struct VariableLivenessAdapter {
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static constexpr const char* name = "VariableLiveness";
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typedef B3::CFG CFG;
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typedef Variable* Thing;
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VariableLivenessAdapter(Procedure& proc)
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: proc(proc)
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{
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}
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void prepareToCompute()
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{
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}
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unsigned numIndices()
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{
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return proc.variables().size();
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}
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static unsigned valueToIndex(Variable* var) { return var->index(); }
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Variable* indexToValue(unsigned index) { return proc.variables()[index]; }
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unsigned blockSize(BasicBlock* block)
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{
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return block->size();
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}
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template<typename Func>
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void forEachUse(BasicBlock* block, unsigned valueBoundaryIndex, const Func& func)
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{
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// We want all of the uses that happen between valueBoundaryIndex-1 and
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// valueBoundaryIndex. Since the Get opcode is the only value that has a use and since
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// this is an early use, we only care about block[valueBoundaryIndex].
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Value* value = block->get(valueBoundaryIndex);
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if (!value)
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return;
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if (value->opcode() != Get)
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return;
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func(value->as<VariableValue>()->variable()->index());
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}
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template<typename Func>
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void forEachDef(BasicBlock* block, unsigned valueBoundaryIndex, const Func& func)
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{
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// We want all of the defs that happen between valueBoundaryIndex-1 and
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// valueBoundaryIndex. Since the Set opcode is the only value that has a def and since
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// this is an late def, we only care about block[valueBoundaryIndex - 1].
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Value* value = block->get(valueBoundaryIndex - 1);
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if (!value)
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return;
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if (value->opcode() != Set)
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return;
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func(value->as<VariableValue>()->variable()->index());
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}
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Procedure& proc;
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};
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class VariableLiveness : public WTF::Liveness<VariableLivenessAdapter> {
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public:
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VariableLiveness(Procedure&);
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~VariableLiveness();
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};
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} } // namespace JSC::B3
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#endif // ENABLE(B3_JIT)
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