| // Copyright 2013 the V8 project authors. All rights reserved. |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following |
| // disclaimer in the documentation and/or other materials provided |
| // with the distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived |
| // from this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #ifndef V8_HYDROGEN_OSR_H_ |
| #define V8_HYDROGEN_OSR_H_ |
| |
| #include "hydrogen.h" |
| #include "ast.h" |
| #include "zone.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| // Responsible for building graph parts related to OSR and otherwise |
| // setting up the graph to do an OSR compile. |
| class HOsrBuilder : public ZoneObject { |
| public: |
| explicit HOsrBuilder(HOptimizedGraphBuilder* builder) |
| : builder_(builder), |
| osr_entry_(NULL), |
| osr_loop_entry_(NULL), |
| osr_values_(NULL) { } |
| // Creates the loop entry block for the given statement, setting up OSR |
| // entries as necessary, and sets the current block to the new block. |
| HBasicBlock* BuildPossibleOsrLoopEntry(IterationStatement* statement); |
| |
| // Process the hydrogen graph after it has been completed, performing |
| // any OSR-specific cleanups or changes. |
| void FinishGraph(); |
| |
| // Process the OSR values and phis after initial graph optimization. |
| void FinishOsrValues(); |
| |
| private: |
| HBasicBlock* BuildLoopEntry(); |
| bool HasOsrEntryAt(IterationStatement* statement); |
| |
| HOptimizedGraphBuilder* builder_; |
| HBasicBlock* osr_entry_; |
| HBasicBlock* osr_loop_entry_; |
| ZoneList<HUnknownOSRValue*>* osr_values_; |
| }; |
| |
| } } // namespace v8::internal |
| |
| #endif // V8_HYDROGEN_OSR_H_ |