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| 1 // Copyright 2014 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_GAP_RESOLVER_H_ |
| 6 #define V8_COMPILER_GAP_RESOLVER_H_ |
| 7 |
| 8 #include "src/compiler/instruction.h" |
| 9 |
| 10 namespace v8 { |
| 11 namespace internal { |
| 12 namespace compiler { |
| 13 |
| 14 class GapResolver V8_FINAL { |
| 15 public: |
| 16 // Interface used by the gap resolver to emit moves and swaps. |
| 17 class Assembler { |
| 18 public: |
| 19 virtual ~Assembler() {} |
| 20 |
| 21 // Assemble move. |
| 22 virtual void AssembleMove(InstructionOperand* source, |
| 23 InstructionOperand* destination) = 0; |
| 24 // Assemble swap. |
| 25 virtual void AssembleSwap(InstructionOperand* source, |
| 26 InstructionOperand* destination) = 0; |
| 27 }; |
| 28 |
| 29 explicit GapResolver(Assembler* assembler) : assembler_(assembler) {} |
| 30 |
| 31 // Resolve a set of parallel moves, emitting assembler instructions. |
| 32 void Resolve(ParallelMove* parallel_move) const; |
| 33 |
| 34 private: |
| 35 // Perform the given move, possibly requiring other moves to satisfy |
| 36 // dependencies. |
| 37 void PerformMove(ZoneList<MoveOperands>* moves, MoveOperands* move) const; |
| 38 |
| 39 // Assembler used to emit moves and save registers. |
| 40 Assembler* const assembler_; |
| 41 }; |
| 42 } |
| 43 } |
| 44 } // namespace v8::internal::compiler |
| 45 |
| 46 #endif // V8_COMPILER_GAP_RESOLVER_H_ |
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