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