jkummerow@chromium.org | 93a47f4 | 2013-07-02 14:43:41 +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_ESCAPE_ANALYSIS_H_ |
| 29 | #define V8_HYDROGEN_ESCAPE_ANALYSIS_H_ |
| 30 | |
| 31 | #include "allocation.h" |
| 32 | #include "hydrogen.h" |
| 33 | |
| 34 | namespace v8 { |
| 35 | namespace internal { |
| 36 | |
| 37 | |
| 38 | class HEscapeAnalysisPhase : public HPhase { |
| 39 | public: |
| 40 | explicit HEscapeAnalysisPhase(HGraph* graph) |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 41 | : HPhase("H_Escape analysis", graph), |
| 42 | captured_(0, zone()), |
jkummerow@chromium.org | 1e8da74 | 2013-08-26 17:13:35 +0000 | [diff] [blame] | 43 | number_of_objects_(0), |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 44 | number_of_values_(0), |
| 45 | cumulative_values_(0), |
| 46 | block_states_(graph->blocks()->length(), zone()) { } |
jkummerow@chromium.org | 93a47f4 | 2013-07-02 14:43:41 +0000 | [diff] [blame] | 47 | |
| 48 | void Run() { |
| 49 | CollectCapturedValues(); |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 50 | PerformScalarReplacement(); |
jkummerow@chromium.org | 93a47f4 | 2013-07-02 14:43:41 +0000 | [diff] [blame] | 51 | } |
| 52 | |
| 53 | private: |
| 54 | void CollectCapturedValues(); |
jkummerow@chromium.org | dc94e19 | 2013-08-30 11:35:42 +0000 | [diff] [blame^] | 55 | bool HasNoEscapingUses(HValue* value); |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 56 | void PerformScalarReplacement(); |
| 57 | void AnalyzeDataFlow(HInstruction* instr); |
jkummerow@chromium.org | 93a47f4 | 2013-07-02 14:43:41 +0000 | [diff] [blame] | 58 | |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 59 | HCapturedObject* NewState(HInstruction* prev); |
| 60 | HCapturedObject* NewStateForAllocation(HInstruction* prev); |
| 61 | HCapturedObject* NewStateForLoopHeader(HInstruction* prev, HCapturedObject*); |
| 62 | HCapturedObject* NewStateCopy(HInstruction* prev, HCapturedObject* state); |
| 63 | |
| 64 | HPhi* NewPhiAndInsert(HBasicBlock* block, HValue* incoming_value, int index); |
| 65 | |
mstarzinger@chromium.org | 1f410f9 | 2013-08-29 08:13:16 +0000 | [diff] [blame] | 66 | HValue* NewMapCheckAndInsert(HCapturedObject* state, HCheckMaps* mapcheck); |
| 67 | |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 68 | HCapturedObject* StateAt(HBasicBlock* block) { |
| 69 | return block_states_.at(block->block_id()); |
| 70 | } |
| 71 | |
| 72 | void SetStateAt(HBasicBlock* block, HCapturedObject* state) { |
| 73 | block_states_.Set(block->block_id(), state); |
| 74 | } |
| 75 | |
| 76 | // List of allocations captured during collection phase. |
| 77 | ZoneList<HInstruction*> captured_; |
| 78 | |
jkummerow@chromium.org | 1e8da74 | 2013-08-26 17:13:35 +0000 | [diff] [blame] | 79 | // Number of captured objects on which scalar replacement was done. |
| 80 | int number_of_objects_; |
| 81 | |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 82 | // Number of scalar values tracked during scalar replacement phase. |
| 83 | int number_of_values_; |
| 84 | int cumulative_values_; |
| 85 | |
| 86 | // Map of block IDs to the data-flow state at block entry during the |
| 87 | // scalar replacement phase. |
| 88 | ZoneList<HCapturedObject*> block_states_; |
jkummerow@chromium.org | 93a47f4 | 2013-07-02 14:43:41 +0000 | [diff] [blame] | 89 | }; |
| 90 | |
| 91 | |
| 92 | } } // namespace v8::internal |
| 93 | |
| 94 | #endif // V8_HYDROGEN_ESCAPE_ANALYSIS_H_ |