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/*
* Copyright (C) 2011 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 DFGArithNodeFlagsInferencePhase_h
#define DFGArithNodeFlagsInferencePhase_h
#include <wtf/Platform.h>
#if ENABLE(DFG_JIT)
namespace JSC { namespace DFG {
class Graph;
// Determine which arithmetic nodes' results are only used in a context that
// truncates to integer anyway. This is great for optimizing away checks for
// overflow and negative zero. NB the way this phase integrates into the rest
// of the DFG makes it non-optional. Instead of proving that a node is only
// used in integer context, it actually does the opposite: finds nodes that
// are used in non-integer contexts. Hence failing to run this phase will make
// the compiler assume that all nodes are just used as integers!
void performArithNodeFlagsInference(Graph&);
} } // namespace JSC::DFG::Phase
#endif // ENABLE(DFG_JIT)
#endif // DFGArithNodeFlagsInferencePhase_h
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