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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 "GPRInfo.h"
#include "Operands.h"
namespace JSC {
class UnaryArithProfile;
class BinaryArithProfile;
class CCallHelpers;
class CodeBlock;
class LazyOperandValueProfileKey;
struct ValueProfile;
class MethodOfGettingAValueProfile {
public:
MethodOfGettingAValueProfile()
: m_kind(None)
{
}
MethodOfGettingAValueProfile(ValueProfile* profile)
{
if (profile) {
m_kind = Ready;
u.profile = profile;
} else
m_kind = None;
}
MethodOfGettingAValueProfile(UnaryArithProfile* profile)
{
if (profile) {
m_kind = UnaryArithProfileReady;
u.unaryArithProfile = profile;
} else
m_kind = None;
}
MethodOfGettingAValueProfile(BinaryArithProfile* profile)
{
if (profile) {
m_kind = BinaryArithProfileReady;
u.binaryArithProfile = profile;
} else
m_kind = None;
}
static MethodOfGettingAValueProfile fromLazyOperand(
CodeBlock*, const LazyOperandValueProfileKey&);
explicit operator bool() const { return m_kind != None; }
void emitReportValue(CCallHelpers&, JSValueRegs) const;
void reportValue(JSValue);
private:
enum Kind {
None,
Ready,
UnaryArithProfileReady,
BinaryArithProfileReady,
LazyOperand
};
Kind m_kind;
union Data {
Data()
: profile(nullptr)
{ }
ValueProfile* profile;
UnaryArithProfile* unaryArithProfile;
BinaryArithProfile* binaryArithProfile;
struct {
CodeBlock* codeBlock;
BytecodeIndex bytecodeOffset;
Operand operand;
} lazyOperand;
} u;
};
} // namespace JSC
#endif // ENABLE(DFG_JIT)