machenbach@chromium.org | c1789ee | 2013-07-05 07:09:57 +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_OSR_H_ |
| 29 | #define V8_HYDROGEN_OSR_H_ |
| 30 | |
| 31 | #include "hydrogen.h" |
| 32 | #include "ast.h" |
| 33 | #include "zone.h" |
| 34 | |
| 35 | namespace v8 { |
| 36 | namespace internal { |
| 37 | |
| 38 | // Responsible for building graph parts related to OSR and otherwise |
| 39 | // setting up the graph to do an OSR compile. |
| 40 | class HOsrBuilder : public ZoneObject { |
| 41 | public: |
| 42 | explicit HOsrBuilder(HOptimizedGraphBuilder* builder) |
hpayer@chromium.org | c5d4971 | 2013-09-11 08:25:48 +0000 | [diff] [blame] | 43 | : unoptimized_frame_slots_(0), |
| 44 | builder_(builder), |
machenbach@chromium.org | c1789ee | 2013-07-05 07:09:57 +0000 | [diff] [blame] | 45 | osr_entry_(NULL), |
| 46 | osr_loop_entry_(NULL), |
| 47 | osr_values_(NULL) { } |
jkummerow@chromium.org | c366976 | 2013-09-30 13:42:25 +0000 | [diff] [blame] | 48 | |
machenbach@chromium.org | c1789ee | 2013-07-05 07:09:57 +0000 | [diff] [blame] | 49 | // Creates the loop entry block for the given statement, setting up OSR |
| 50 | // entries as necessary, and sets the current block to the new block. |
jkummerow@chromium.org | c366976 | 2013-09-30 13:42:25 +0000 | [diff] [blame] | 51 | HBasicBlock* BuildOsrLoopEntry(IterationStatement* statement); |
machenbach@chromium.org | c1789ee | 2013-07-05 07:09:57 +0000 | [diff] [blame] | 52 | |
| 53 | // Process the hydrogen graph after it has been completed, performing |
| 54 | // any OSR-specific cleanups or changes. |
| 55 | void FinishGraph(); |
| 56 | |
| 57 | // Process the OSR values and phis after initial graph optimization. |
| 58 | void FinishOsrValues(); |
| 59 | |
hpayer@chromium.org | c5d4971 | 2013-09-11 08:25:48 +0000 | [diff] [blame] | 60 | // Return the number of slots in the unoptimized frame at the entry to OSR. |
| 61 | int UnoptimizedFrameSlots() const { |
| 62 | return unoptimized_frame_slots_; |
| 63 | } |
| 64 | |
machenbach@chromium.org | c1789ee | 2013-07-05 07:09:57 +0000 | [diff] [blame] | 65 | bool HasOsrEntryAt(IterationStatement* statement); |
| 66 | |
jkummerow@chromium.org | c366976 | 2013-09-30 13:42:25 +0000 | [diff] [blame] | 67 | private: |
hpayer@chromium.org | c5d4971 | 2013-09-11 08:25:48 +0000 | [diff] [blame] | 68 | int unoptimized_frame_slots_; |
machenbach@chromium.org | c1789ee | 2013-07-05 07:09:57 +0000 | [diff] [blame] | 69 | HOptimizedGraphBuilder* builder_; |
| 70 | HBasicBlock* osr_entry_; |
| 71 | HBasicBlock* osr_loop_entry_; |
| 72 | ZoneList<HUnknownOSRValue*>* osr_values_; |
| 73 | }; |
| 74 | |
| 75 | } } // namespace v8::internal |
| 76 | |
| 77 | #endif // V8_HYDROGEN_OSR_H_ |