[turbofan] push virtual register field down to InstructionOperand

src/compiler/register-allocator-verifier.cc

 // 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.
 
 #include "src/bit-vector.h"
 #include "src/compiler/instruction.h"
 #include "src/compiler/register-allocator-verifier.h"
 
 namespace v8 {
 namespace internal {
@@ skipping 22 matching lines @@
              constraint.virtual_register_);
   }
 }
 
 
 void RegisterAllocatorVerifier::VerifyTemp(
     const OperandConstraint& constraint) {
   CHECK_NE(kSameAsFirst, constraint.type_);
   CHECK_NE(kImmediate, constraint.type_);
   CHECK_NE(kConstant, constraint.type_);
-  CHECK_EQ(UnallocatedOperand::kInvalidVirtualRegister,
-           constraint.virtual_register_);
 }
 
 
 void RegisterAllocatorVerifier::VerifyOutput(
     const OperandConstraint& constraint) {
   CHECK_NE(kImmediate, constraint.type_);
   CHECK_NE(UnallocatedOperand::kInvalidVirtualRegister,
            constraint.virtual_register_);
 }
 
@@ skipping 609 matching lines @@
         int virtual_register = op_constraints[count].virtual_register_;
         current->Define(zone(), instr->OutputAt(i), virtual_register);
       }
     }
   }
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8