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_X64_LITHIUM_GAP_RESOLVER_X64_H_ 6 #define V8_X64_LITHIUM_GAP_RESOLVER_X64_H_ 7 8 #include "src/v8.h" 9 10 #include "src/lithium.h" 11 12 namespace v8 { 13 namespace internal { 14 15 class LCodeGen; 16 class LGapResolver; 17 18 class LGapResolver FINAL BASE_EMBEDDED { 19 public: 20 explicit LGapResolver(LCodeGen* owner); 21 22 // Resolve a set of parallel moves, emitting assembler instructions. 23 void Resolve(LParallelMove* parallel_move); 24 25 private: 26 // Build the initial list of moves. 27 void BuildInitialMoveList(LParallelMove* parallel_move); 28 29 // Perform the move at the moves_ index in question (possibly requiring 30 // other moves to satisfy dependencies). 31 void PerformMove(int index); 32 33 // Emit a move and remove it from the move graph. 34 void EmitMove(int index); 35 36 // Execute a move by emitting a swap of two operands. The move from 37 // source to destination is removed from the move graph. 38 void EmitSwap(int index); 39 40 // Verify the move list before performing moves. 41 void Verify(); 42 43 LCodeGen* cgen_; 44 45 // List of moves not yet resolved. 46 ZoneList<LMoveOperands> moves_; 47 }; 48 49 } } // namespace v8::internal 50 51 #endif // V8_X64_LITHIUM_GAP_RESOLVER_X64_H_ 52