[WIP][turbofan] Instruction scheduler for Turbofan.

src/compiler/instruction-selector.h

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_COMPILER_INSTRUCTION_SELECTOR_H_
 #define V8_COMPILER_INSTRUCTION_SELECTOR_H_
 
 #include <map>
 
 #include "src/compiler/common-operator.h"
 #include "src/compiler/instruction.h"
+#include "src/compiler/instruction-scheduler.h"
 #include "src/compiler/machine-operator.h"
 #include "src/compiler/node.h"
 #include "src/zone-containers.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
 // Forward declarations.
 class BasicBlock;
@@ skipping 17 matching lines @@
   InstructionSelector(
       Zone* zone, size_t node_count, Linkage* linkage,
       InstructionSequence* sequence, Schedule* schedule,
       SourcePositionTable* source_positions,
       SourcePositionMode source_position_mode = kCallSourcePositions,
       Features features = SupportedFeatures());
 
   // Visit code for the entire graph with the included schedule.
   void SelectInstructions();
 
+  void StartBlock(RpoNumber rpo);
+  void EndBlock(RpoNumber rpo);
+  void AddInstruction(Instruction* instr);
+
   // ===========================================================================
   // ============= Architecture-independent code emission methods. =============
   // ===========================================================================
 
   Instruction* Emit(InstructionCode opcode, InstructionOperand output,
                     size_t temp_count = 0, InstructionOperand* temps = NULL);
   Instruction* Emit(InstructionCode opcode, InstructionOperand output,
                     InstructionOperand a, size_t temp_count = 0,
                     InstructionOperand* temps = NULL);
   Instruction* Emit(InstructionCode opcode, InstructionOperand output,
@@ skipping 187 matching lines @@
   InstructionSequence* const sequence_;
   SourcePositionTable* const source_positions_;
   SourcePositionMode const source_position_mode_;
   Features features_;
   Schedule* const schedule_;
   BasicBlock* current_block_;
   ZoneVector<Instruction*> instructions_;
   BoolVector defined_;
   BoolVector used_;
   IntVector virtual_registers_;
+  InstructionScheduler* scheduler_;
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_INSTRUCTION_SELECTOR_H_