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/*
* Copyright (C) 2012-2017 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
// This is guarded by ENABLE_DFG_JIT only because it uses some value profiles
// that are currently only used if the DFG is enabled (i.e. they are not
// available in the profile-only configuration). Hopefully someday all of
// these #if's will disappear...
#if ENABLE(DFG_JIT)
#include "BytecodeIndex.h"
#include "CodeOrigin.h"
#include "GPRInfo.h"
#include "Operands.h"
#include "TagRegistersMode.h"
namespace JSC {
class UnaryArithProfile;
class BinaryArithProfile;
class CCallHelpers;
class CodeBlock;
struct ValueProfile;
class MethodOfGettingAValueProfile {
public:
MethodOfGettingAValueProfile()
: m_kind(Kind::None)
{
}
static MethodOfGettingAValueProfile unaryArithProfile(CodeOrigin codeOrigin)
{
MethodOfGettingAValueProfile result;
result.m_kind = Kind::UnaryArithProfile;
result.m_codeOrigin = codeOrigin;
return result;
}
static MethodOfGettingAValueProfile binaryArithProfile(CodeOrigin codeOrigin)
{
MethodOfGettingAValueProfile result;
result.m_kind = Kind::BinaryArithProfile;
result.m_codeOrigin = codeOrigin;
return result;
}
static MethodOfGettingAValueProfile argumentValueProfile(CodeOrigin codeOrigin, Operand operand)
{
MethodOfGettingAValueProfile result;
result.m_kind = Kind::ArgumentValueProfile;
result.m_codeOrigin = codeOrigin;
result.m_rawOperand = operand.asBits();
return result;
}
static MethodOfGettingAValueProfile bytecodeValueProfile(CodeOrigin codeOrigin)
{
MethodOfGettingAValueProfile result;
result.m_kind = Kind::BytecodeValueProfile;
result.m_codeOrigin = codeOrigin;
return result;
}
static MethodOfGettingAValueProfile lazyOperandValueProfile(CodeOrigin codeOrigin, Operand operand)
{
MethodOfGettingAValueProfile result;
result.m_kind = Kind::LazyOperandValueProfile;
result.m_codeOrigin = codeOrigin;
result.m_rawOperand = operand.asBits();
return result;
}
explicit operator bool() const { return m_kind != Kind::None; }
// The temporary register is only needed on 64-bits builds (for testing BigInt32).
void emitReportValue(CCallHelpers&, CodeBlock* optimizedCodeBlock, JSValueRegs, GPRReg tempGPR, TagRegistersMode = HaveTagRegisters) const;
private:
enum class Kind : uint8_t {
None,
UnaryArithProfile,
BinaryArithProfile,
BytecodeValueProfile,
ArgumentValueProfile,
LazyOperandValueProfile,
};
static constexpr unsigned bitsOfKind = 3;
static_assert(static_cast<unsigned>(Kind::LazyOperandValueProfile) <= ((1U << bitsOfKind) - 1));
CodeOrigin m_codeOrigin;
uint64_t m_rawOperand : Operand::maxBits { 0 };
Kind m_kind : bitsOfKind;
};
} // namespace JSC
#endif // ENABLE(DFG_JIT)
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