| | 1 | /* |
| | 2 | * Copyright (C) 2012 Apple Inc. All rights reserved. |
| | 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 | |
| | 26 | #ifndef DFGCFGSimplificationPhase_h |
| | 27 | #define DFGCFGSimplificationPhase_h |
| | 28 | |
| | 29 | #if ENABLE(DFG_JIT) |
| | 30 | |
| | 31 | namespace JSC { namespace DFG { |
| | 32 | |
| | 33 | class Graph; |
| | 34 | |
| | 35 | // CFG simplification: |
| | 36 | // |
| | 37 | // jump to single predecessor -> merge blocks |
| | 38 | // branch on constant -> jump |
| | 39 | // branch to same blocks -> jump |
| | 40 | // jump-only block -> remove |
| | 41 | // kill dead code |
| | 42 | |
| | 43 | bool performCFGSimplification(Graph&); |
| | 44 | |
| | 45 | } } // namespace JSC::DFG |
| | 46 | |
| | 47 | #endif // ENABLE(DFG_JIT) |
| | 48 | |
| | 49 | #endif // DFGCFGSimplificationPhase_h |
| | 50 | |
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