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FTLInlineCacheSize.cpp
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141 lines (123 loc) · 3.43 KB
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/*
* Copyright (C) 2013-2015 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.
*/
#include "config.h"
#include "FTLInlineCacheSize.h"
#if ENABLE(FTL_JIT)
#include "DFGNode.h"
#include "JITInlineCacheGenerator.h"
#include "MacroAssembler.h"
namespace JSC { namespace FTL {
using namespace DFG;
// The default sizes are x86-64-specific, and were found empirically. They have to cover the worst
// possible combination of registers leading to the largest possible encoding of each instruction in
// the IC.
//
// FIXME: The ARM64 sizes are overestimates; if there is any branch compaction then we should be able
// to get away with less. The branch compaction code currently validates the size of the IC before
// doing any compaction, so we need to overestimate and give the uncompacted size. This would be
// relatively easy to fix.
// https://bugs.webkit.org/show_bug.cgi?id=129335
size_t sizeOfGetById()
{
#if CPU(ARM64)
return 36;
#else
return 30;
#endif
}
size_t sizeOfPutById()
{
#if CPU(ARM64)
return 44;
#else
return 32;
#endif
}
size_t sizeOfCall()
{
#if CPU(ARM64)
return 60;
#else
return 60;
#endif
}
size_t sizeOfCallVarargs()
{
#if CPU(ARM64)
return 332;
#else
return 275;
#endif
}
size_t sizeOfCallForwardVarargs()
{
#if CPU(ARM64)
return 312;
#else
return 262;
#endif
}
size_t sizeOfConstructVarargs()
{
return sizeOfCallVarargs(); // Should be the same size.
}
size_t sizeOfConstructForwardVarargs()
{
return sizeOfCallForwardVarargs(); // Should be the same size.
}
size_t sizeOfIn()
{
#if CPU(ARM64)
return 4;
#else
return 5;
#endif
}
size_t sizeOfICFor(Node* node)
{
switch (node->op()) {
case GetById:
return sizeOfGetById();
case PutById:
return sizeOfPutById();
case Call:
case Construct:
return sizeOfCall();
case CallVarargs:
return sizeOfCallVarargs();
case CallForwardVarargs:
return sizeOfCallForwardVarargs();
case ConstructVarargs:
return sizeOfConstructVarargs();
case ConstructForwardVarargs:
return sizeOfConstructForwardVarargs();
case In:
return sizeOfIn();
default:
return 0;
}
}
} } // namespace JSC::FTL
#endif // ENABLE(FTL_JIT)