[turbofan] make register allocator verifier independent of phi assignment

Review URL: https://codereview.chromium.org/875853002

Cr-Commit-Position: refs/heads/master@{#26265}

src/compiler/register-allocator-verifier.h

@@ -49,10 +49,9 @@ class RegisterAllocatorVerifier FINAL : public ZoneObject {
     OperandConstraint* operand_constraints_;
   };
 
-  class OutgoingMapping;
+  class BlockMaps;
 
   typedef ZoneVector<InstructionConstraint> Constraints;
-  typedef ZoneVector<OutgoingMapping*> OutgoingMappings;
 
   Zone* zone() const { return zone_; }
   const RegisterConfiguration* config() { return config_; }
@@ -68,8 +67,7 @@ class RegisterAllocatorVerifier FINAL : public ZoneObject {
   void CheckConstraint(const InstructionOperand* op,
                        const OperandConstraint* constraint);
 
-  void ConstructOutgoingMappings(OutgoingMappings* outgoing_mappings,
-                                 bool initial_pass);
+  void VerifyGapMoves(BlockMaps* outgoing_mappings, bool initial_pass);
 
   Zone* const zone_;
   const RegisterConfiguration* config_;