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/*
* Copyright (C) 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.
*/
#pragma once
#include "ArrayProfile.h"
#include "BytecodeStructs.h"
#include "ValueProfile.h"
namespace JSC {
template <typename Bytecode>
unsigned valueProfileOffsetFor(const Bytecode& bytecode, unsigned checkpointIndex)
{
UNUSED_PARAM(checkpointIndex);
if constexpr (Bytecode::opcodeID == op_iterator_open) {
switch (checkpointIndex) {
case OpIteratorOpen::symbolCall: return bytecode.m_iteratorValueProfile;
case OpIteratorOpen::getNext: return bytecode.m_nextValueProfile;
default: RELEASE_ASSERT_NOT_REACHED();
}
} else if constexpr (Bytecode::opcodeID == op_iterator_next) {
switch (checkpointIndex) {
case OpIteratorNext::computeNext: return bytecode.m_nextResultValueProfile;
case OpIteratorNext::getDone: return bytecode.m_doneValueProfile;
case OpIteratorNext::getValue: return bytecode.m_valueValueProfile;
default: RELEASE_ASSERT_NOT_REACHED();
}
} else if constexpr (Bytecode::opcodeID == op_instanceof) {
switch (checkpointIndex) {
case OpInstanceof::getHasInstance: return bytecode.m_hasInstanceValueProfile;
case OpInstanceof::getPrototype: return bytecode.m_prototypeValueProfile;
default: RELEASE_ASSERT_NOT_REACHED();
}
} else
return bytecode.m_valueProfile;
}
template<typename Bytecode>
Operand destinationFor(const Bytecode& bytecode, unsigned checkpointIndex, JITType type = JITType::None)
{
UNUSED_PARAM(checkpointIndex);
if constexpr (Bytecode::opcodeID == op_iterator_open) {
switch (checkpointIndex) {
case OpIteratorOpen::symbolCall: return bytecode.m_iterator;
case OpIteratorOpen::getNext: return bytecode.m_next;
default: RELEASE_ASSERT_NOT_REACHED();
}
return { };
} else if constexpr (Bytecode::opcodeID == op_iterator_next) {
switch (checkpointIndex) {
case OpIteratorNext::computeNext: {
if (type == JITType::DFGJIT || type == JITType::FTLJIT)
return Operand::tmp(OpIteratorNext::nextResult);
return bytecode.m_value; // We reuse value as a temp because its either not used in subsequent bytecodes or written as the temp object .
}
case OpIteratorNext::getDone: return bytecode.m_done;
case OpIteratorNext::getValue: return bytecode.m_value;
default: RELEASE_ASSERT_NOT_REACHED();
}
return { };
} else if constexpr (Bytecode::opcodeID == op_call_ignore_result) {
return { };
} else
return bytecode.m_dst;
}
// Call-like opcode locations
template<typename Bytecode>
VirtualRegister calleeFor(const Bytecode& bytecode, unsigned checkpointIndex)
{
UNUSED_PARAM(checkpointIndex);
if constexpr (Bytecode::opcodeID == op_iterator_open) {
ASSERT(checkpointIndex == OpIteratorOpen::symbolCall);
return bytecode.m_symbolIterator;
} else if constexpr (Bytecode::opcodeID == op_iterator_next) {
ASSERT(checkpointIndex == OpIteratorNext::computeNext);
return bytecode.m_next;
} else
return bytecode.m_callee;
}
template<typename Bytecode>
unsigned argumentCountIncludingThisFor(const Bytecode& bytecode, unsigned checkpointIndex)
{
UNUSED_PARAM(checkpointIndex);
if constexpr (Bytecode::opcodeID == op_iterator_open) {
ASSERT(checkpointIndex == OpIteratorOpen::symbolCall);
return 1;
} else if constexpr (Bytecode::opcodeID == op_iterator_next) {
ASSERT(checkpointIndex == OpIteratorNext::computeNext);
return 1;
} else
return bytecode.m_argc;
}
template<typename Bytecode>
ptrdiff_t stackOffsetInRegistersForCall(const Bytecode& bytecode, unsigned checkpointIndex)
{
UNUSED_PARAM(checkpointIndex);
if constexpr (Bytecode::opcodeID == op_iterator_open) {
ASSERT(checkpointIndex == OpIteratorOpen::symbolCall);
return CallFrame::headerSizeInRegisters - bytecode.m_iterable.offset();
} else if constexpr (Bytecode::opcodeID == op_iterator_next) {
ASSERT(checkpointIndex == OpIteratorNext::computeNext);
return CallFrame::headerSizeInRegisters - bytecode.m_iterator.offset();
} else
return bytecode.m_argv;
}
template<typename BytecodeMetadata>
CallLinkInfo& callLinkInfoFor(BytecodeMetadata& metadata, unsigned checkpointIndex)
{
UNUSED_PARAM(checkpointIndex);
return metadata.m_callLinkInfo;
}
} // namespace JSC
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