danno@chromium.org | d3c4210 | 2013-08-01 16:58:23 +0000 | [diff] [blame] | 1 | // Copyright 2013 the V8 project authors. All rights reserved. |
| 2 | // Redistribution and use in source and binary forms, with or without |
| 3 | // modification, are permitted provided that the following conditions are |
| 4 | // met: |
| 5 | // |
| 6 | // * Redistributions of source code must retain the above copyright |
| 7 | // notice, this list of conditions and the following disclaimer. |
| 8 | // * Redistributions in binary form must reproduce the above |
| 9 | // copyright notice, this list of conditions and the following |
| 10 | // disclaimer in the documentation and/or other materials provided |
| 11 | // with the distribution. |
| 12 | // * Neither the name of Google Inc. nor the names of its |
| 13 | // contributors may be used to endorse or promote products derived |
| 14 | // from this software without specific prior written permission. |
| 15 | // |
| 16 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | |
| 28 | #ifndef V8_HYDROGEN_MARK_DEOPTIMIZE_H_ |
| 29 | #define V8_HYDROGEN_MARK_DEOPTIMIZE_H_ |
| 30 | |
| 31 | #include "hydrogen.h" |
| 32 | |
| 33 | namespace v8 { |
| 34 | namespace internal { |
| 35 | |
| 36 | |
| 37 | // Compute DeoptimizeOnUndefined flag for phis. Any phi that can reach a use |
| 38 | // with DeoptimizeOnUndefined set must have DeoptimizeOnUndefined set. |
| 39 | // Currently only HCompareNumericAndBranch, with double input representation, |
| 40 | // has this flag set. The flag is used by HChange tagged->double, which must |
| 41 | // deoptimize if one of its uses has this flag set. |
| 42 | class HMarkDeoptimizeOnUndefinedPhase : public HPhase { |
| 43 | public: |
| 44 | explicit HMarkDeoptimizeOnUndefinedPhase(HGraph* graph) |
| 45 | : HPhase("H_Mark deoptimize on undefined", graph), |
| 46 | worklist_(16, zone()) {} |
| 47 | |
| 48 | void Run(); |
| 49 | |
| 50 | private: |
| 51 | void ProcessPhi(HPhi* phi); |
| 52 | |
| 53 | // Preallocated worklist used as an optimization so we don't have |
| 54 | // to allocate a new ZoneList for every ProcessPhi() invocation. |
| 55 | ZoneList<HPhi*> worklist_; |
| 56 | |
| 57 | DISALLOW_COPY_AND_ASSIGN(HMarkDeoptimizeOnUndefinedPhase); |
| 58 | }; |
| 59 | |
| 60 | |
danno@chromium.org | c00ec2b | 2013-08-14 17:13:49 +0000 | [diff] [blame] | 61 | class HComputeChangeUndefinedToNaN : public HPhase { |
| 62 | public: |
| 63 | explicit HComputeChangeUndefinedToNaN(HGraph* graph) |
| 64 | : HPhase("H_Compute change undefined to nan", graph) {} |
| 65 | |
| 66 | void Run(); |
| 67 | |
| 68 | private: |
| 69 | DISALLOW_COPY_AND_ASSIGN(HComputeChangeUndefinedToNaN); |
| 70 | }; |
| 71 | |
| 72 | |
danno@chromium.org | d3c4210 | 2013-08-01 16:58:23 +0000 | [diff] [blame] | 73 | } } // namespace v8::internal |
| 74 | |
| 75 | #endif // V8_HYDROGEN_MARK_DEOPTIMIZE_H_ |