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f9bf01c6 1/*
93a37866 2 * Copyright (C) 2012 Apple Inc. All rights reserved.
f9bf01c6
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3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
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26#ifndef DFGConstantFoldingPhase_h
27#define DFGConstantFoldingPhase_h
f9bf01c6 28
6fe7ccc8 29#if ENABLE(DFG_JIT)
f9bf01c6 30
6fe7ccc8 31namespace JSC { namespace DFG {
f9bf01c6 32
6fe7ccc8 33class Graph;
14957cd0 34
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35// CFA-based constant folding. Walks those blocks marked by the CFA as having
36// inferred constants, and replaces those nodes with constants whilst injecting
37// Phantom nodes to keep the children alive (which is necessary for OSR exit).
14957cd0 38
93a37866 39bool performConstantFolding(Graph&);
f9bf01c6 40
6fe7ccc8 41} } // namespace JSC::DFG
f9bf01c6 42
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43#endif // ENABLE(DFG_JIT)
44
93a37866 45#endif // DFGConstantFoldingPhase_h
14957cd0 46