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/*
* Copyright (C) 2013 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.
*/
#ifndef DFGUseKind_h
#define DFGUseKind_h
#include <wtf/Platform.h>
#if ENABLE(DFG_JIT)
#include "SpeculatedType.h"
#include <wtf/PrintStream.h>
namespace JSC { namespace DFG {
enum UseKind {
UntypedUse,
Int32Use,
KnownInt32Use,
MachineIntUse,
RealNumberUse,
NumberUse,
KnownNumberUse,
BooleanUse,
CellUse,
KnownCellUse,
ObjectUse,
FinalObjectUse,
ObjectOrOtherUse,
StringIdentUse,
StringUse,
KnownStringUse,
StringObjectUse,
StringOrStringObjectUse,
NotCellUse,
OtherUse,
LastUseKind // Must always be the last entry in the enum, as it is used to denote the number of enum elements.
};
ALWAYS_INLINE SpeculatedType typeFilterFor(UseKind useKind)
{
switch (useKind) {
case UntypedUse:
return SpecFullTop;
case Int32Use:
case KnownInt32Use:
return SpecInt32;
case MachineIntUse:
return SpecMachineInt;
case RealNumberUse:
return SpecFullRealNumber;
case NumberUse:
case KnownNumberUse:
return SpecFullNumber;
case BooleanUse:
return SpecBoolean;
case CellUse:
case KnownCellUse:
return SpecCell;
case ObjectUse:
return SpecObject;
case FinalObjectUse:
return SpecFinalObject;
case ObjectOrOtherUse:
return SpecObject | SpecOther;
case StringIdentUse:
return SpecStringIdent;
case StringUse:
case KnownStringUse:
return SpecString;
case StringObjectUse:
return SpecStringObject;
case StringOrStringObjectUse:
return SpecString | SpecStringObject;
case NotCellUse:
return ~SpecCell;
case OtherUse:
return SpecOther;
default:
RELEASE_ASSERT_NOT_REACHED();
return SpecFullTop;
}
}
ALWAYS_INLINE bool shouldNotHaveTypeCheck(UseKind kind)
{
switch (kind) {
case UntypedUse:
case KnownInt32Use:
case KnownNumberUse:
case KnownCellUse:
case KnownStringUse:
return true;
default:
return false;
}
}
ALWAYS_INLINE bool mayHaveTypeCheck(UseKind kind)
{
return !shouldNotHaveTypeCheck(kind);
}
ALWAYS_INLINE bool isNumerical(UseKind kind)
{
switch (kind) {
case Int32Use:
case KnownInt32Use:
case MachineIntUse:
case RealNumberUse:
case NumberUse:
case KnownNumberUse:
return true;
default:
return false;
}
}
ALWAYS_INLINE bool isDouble(UseKind kind)
{
switch (kind) {
case RealNumberUse:
case NumberUse:
case KnownNumberUse:
return true;
default:
return false;
}
}
ALWAYS_INLINE bool isCell(UseKind kind)
{
switch (kind) {
case CellUse:
case KnownCellUse:
case ObjectUse:
case FinalObjectUse:
case StringIdentUse:
case StringUse:
case KnownStringUse:
case StringObjectUse:
case StringOrStringObjectUse:
return true;
default:
return false;
}
}
// Returns true if it uses structure in a way that could be clobbered by
// things that change the structure.
ALWAYS_INLINE bool usesStructure(UseKind kind)
{
switch (kind) {
case StringObjectUse:
case StringOrStringObjectUse:
return true;
default:
return false;
}
}
} } // namespace JSC::DFG
namespace WTF {
void printInternal(PrintStream&, JSC::DFG::UseKind);
} // namespace WTF
#endif // ENABLE(DFG_JIT)
#endif // DFGUseKind_h
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