Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1 | // Copyright 2011 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_CRANKSHAFT_X64_LITHIUM_GAP_RESOLVER_X64_H_ |
| 6 | #define V8_CRANKSHAFT_X64_LITHIUM_GAP_RESOLVER_X64_H_ |
| 7 | |
| 8 | #include "src/crankshaft/lithium.h" |
| 9 | |
| 10 | namespace v8 { |
| 11 | namespace internal { |
| 12 | |
| 13 | class LCodeGen; |
| 14 | class LGapResolver; |
| 15 | |
| 16 | class LGapResolver final BASE_EMBEDDED { |
| 17 | public: |
| 18 | explicit LGapResolver(LCodeGen* owner); |
| 19 | |
| 20 | // Resolve a set of parallel moves, emitting assembler instructions. |
| 21 | void Resolve(LParallelMove* parallel_move); |
| 22 | |
| 23 | private: |
| 24 | // Build the initial list of moves. |
| 25 | void BuildInitialMoveList(LParallelMove* parallel_move); |
| 26 | |
| 27 | // Perform the move at the moves_ index in question (possibly requiring |
| 28 | // other moves to satisfy dependencies). |
| 29 | void PerformMove(int index); |
| 30 | |
| 31 | // Emit a move and remove it from the move graph. |
| 32 | void EmitMove(int index); |
| 33 | |
| 34 | // Execute a move by emitting a swap of two operands. The move from |
| 35 | // source to destination is removed from the move graph. |
| 36 | void EmitSwap(int index); |
| 37 | |
| 38 | // Verify the move list before performing moves. |
| 39 | void Verify(); |
| 40 | |
| 41 | LCodeGen* cgen_; |
| 42 | |
| 43 | // List of moves not yet resolved. |
| 44 | ZoneList<LMoveOperands> moves_; |
| 45 | }; |
| 46 | |
| 47 | } // namespace internal |
| 48 | } // namespace v8 |
| 49 | |
| 50 | #endif // V8_CRANKSHAFT_X64_LITHIUM_GAP_RESOLVER_X64_H_ |