mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
synced 2024-11-23 04:09:40 +00:00
67 lines
2.3 KiB
C++
67 lines
2.3 KiB
C++
/*
|
|
* Copyright (C) 2014, 2015 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
|
|
|
|
#if ENABLE(DFG_JIT)
|
|
|
|
#include <wtf/PrintStream.h>
|
|
|
|
namespace JSC { namespace DFG {
|
|
|
|
enum ValueStrength {
|
|
// The value has been used for optimization and it arose through inference. We don't want the
|
|
// fact that we optimized the code to result in the GC keeping this value alive unnecessarily,
|
|
// so we'd rather kill the code and recompile than keep the object alive longer.
|
|
WeakValue,
|
|
|
|
// The code will keep this value alive. This is true of constants that were present in the
|
|
// source. String constants tend to be strong.
|
|
StrongValue
|
|
};
|
|
|
|
inline ValueStrength merge(ValueStrength a, ValueStrength b)
|
|
{
|
|
switch (a) {
|
|
case WeakValue:
|
|
return b;
|
|
case StrongValue:
|
|
return StrongValue;
|
|
}
|
|
RELEASE_ASSERT_NOT_REACHED();
|
|
|
|
return WeakValue;
|
|
}
|
|
|
|
} } // namespace JSC::DFG
|
|
|
|
namespace WTF {
|
|
|
|
void printInternal(PrintStream&, JSC::DFG::ValueStrength);
|
|
|
|
} // namespace WTF
|
|
|
|
#endif // ENABLE(DFG_JIT)
|