[turbofan] add gap move verifier

src/compiler/register-allocator-verifier.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_REGISTER_ALLOCATOR_VERIFIER_H_
 #define V8_REGISTER_ALLOCATOR_VERIFIER_H_
 
 #include "src/v8.h"
 #include "src/zone-containers.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
 class InstructionOperand;
 class InstructionSequence;
 
 class RegisterAllocatorVerifier FINAL : public ZoneObject {
  public:
-  RegisterAllocatorVerifier(Zone* zone, const InstructionSequence* sequence);
+  RegisterAllocatorVerifier(Zone* zone, const RegisterConfiguration* config,
+                            const InstructionSequence* sequence);
 
   void VerifyAssignment();
+  void VerifyGapMoves();
 
  private:
   enum ConstraintType {
     kConstant,
     kImmediate,
     kRegister,
     kFixedRegister,
     kDoubleRegister,
     kFixedDoubleRegister,
     kFixedSlot,
     kNone,
     kNoneDouble,
     kSameAsFirst
   };
 
   struct OperandConstraint {
     ConstraintType type_;
     int value_;  // subkind index when relevant
+    int virtual_register_;
   };
 
   struct InstructionConstraint {
     const Instruction* instruction_;
     size_t operand_constaints_size_;
     OperandConstraint* operand_constraints_;
   };
 
   typedef ZoneVector<InstructionConstraint> Constraints;
 
+  Zone* zone() const { return zone_; }
+  const RegisterConfiguration* config() { return config_; }
   const InstructionSequence* sequence() const { return sequence_; }
   Constraints* constraints() { return &constraints_; }
+
+  static void VerifyInput(const OperandConstraint& constraint);
+  static void VerifyTemp(const OperandConstraint& constraint);
+  static void VerifyOutput(const OperandConstraint& constraint);
+
   void BuildConstraint(const InstructionOperand* op,
                        OperandConstraint* constraint);
   void CheckConstraint(const InstructionOperand* op,
                        const OperandConstraint* constraint);
 
+  Zone* const zone_;
+  const RegisterConfiguration* config_;
   const InstructionSequence* const sequence_;
   Constraints constraints_;
 
   DISALLOW_COPY_AND_ASSIGN(RegisterAllocatorVerifier);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif