mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
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105 lines
3.5 KiB
C++
105 lines
3.5 KiB
C++
/*
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* Copyright (C) 2015-2017 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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#include "config.h"
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#include "B3StackmapGenerationParams.h"
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#if ENABLE(B3_JIT)
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#include "AirCode.h"
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#include "AirGenerationContext.h"
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#include "B3Procedure.h"
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#include "B3StackmapValue.h"
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namespace JSC { namespace B3 {
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const RegisterSet& StackmapGenerationParams::usedRegisters() const
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{
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ASSERT(m_context.code->needsUsedRegisters());
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return m_value->m_usedRegisters;
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}
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RegisterSet StackmapGenerationParams::unavailableRegisters() const
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{
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RegisterSet result = usedRegisters();
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RegisterSet unsavedCalleeSaves = RegisterSet::vmCalleeSaveRegisters();
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unsavedCalleeSaves.exclude(m_context.code->calleeSaveRegisters());
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result.merge(unsavedCalleeSaves);
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for (GPRReg gpr : m_gpScratch)
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result.clear(gpr);
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for (FPRReg fpr : m_fpScratch)
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result.clear(fpr);
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return result;
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}
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Vector<Box<MacroAssembler::Label>> StackmapGenerationParams::successorLabels() const
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{
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RELEASE_ASSERT(m_context.indexInBlock == m_context.currentBlock->size() - 1);
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RELEASE_ASSERT(m_value->effects().terminal);
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Vector<Box<MacroAssembler::Label>> result(m_context.currentBlock->numSuccessors());
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for (unsigned i = m_context.currentBlock->numSuccessors(); i--;)
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result[i] = m_context.blockLabels[m_context.currentBlock->successorBlock(i)];
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return result;
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}
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bool StackmapGenerationParams::fallsThroughToSuccessor(unsigned successorIndex) const
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{
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RELEASE_ASSERT(m_context.indexInBlock == m_context.currentBlock->size() - 1);
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RELEASE_ASSERT(m_value->effects().terminal);
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Air::BasicBlock* successor = m_context.currentBlock->successorBlock(successorIndex);
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Air::BasicBlock* nextBlock = m_context.code->findNextBlock(m_context.currentBlock);
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return successor == nextBlock;
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}
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Procedure& StackmapGenerationParams::proc() const
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{
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return m_context.code->proc();
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}
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Air::Code& StackmapGenerationParams::code() const
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{
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return proc().code();
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}
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StackmapGenerationParams::StackmapGenerationParams(
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StackmapValue* value, const Vector<ValueRep>& reps, Air::GenerationContext& context)
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: m_value(value)
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, m_reps(reps)
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, m_context(context)
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{
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}
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} } // namespace JSC::B3
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#endif // ENABLE(B3_JIT)
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