Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1 | // Copyright 2015 the V8 project authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #ifndef V8_COMPILER_FRAME_ELIDER_H_ |
| 6 | #define V8_COMPILER_FRAME_ELIDER_H_ |
| 7 | |
| 8 | #include "src/compiler/instruction.h" |
| 9 | |
| 10 | namespace v8 { |
| 11 | namespace internal { |
| 12 | namespace compiler { |
| 13 | |
| 14 | |
| 15 | // Determine which instruction blocks need a frame and where frames must be |
| 16 | // constructed/deconstructed. |
| 17 | class FrameElider { |
| 18 | public: |
| 19 | explicit FrameElider(InstructionSequence* code); |
| 20 | void Run(); |
| 21 | |
| 22 | |
| 23 | private: |
| 24 | void MarkBlocks(); |
| 25 | void PropagateMarks(); |
| 26 | void MarkDeConstruction(); |
| 27 | bool PropagateInOrder(); |
| 28 | bool PropagateReversed(); |
| 29 | bool PropagateIntoBlock(InstructionBlock* block); |
| 30 | const InstructionBlocks& instruction_blocks() const; |
| 31 | InstructionBlock* InstructionBlockAt(RpoNumber rpo_number) const; |
| 32 | Instruction* InstructionAt(int index) const; |
| 33 | |
| 34 | InstructionSequence* const code_; |
| 35 | }; |
| 36 | |
| 37 | } // namespace compiler |
| 38 | } // namespace internal |
| 39 | } // namespace v8 |
| 40 | |
| 41 | #endif // V8_COMPILER_FRAME_ELIDER_H_ |