[turbofan] push virtual register field down to InstructionOperand

src/compiler/register-allocator.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/compiler/linkage.h"
 #include "src/compiler/register-allocator.h"
 #include "src/string-stream.h"
 
 namespace v8 {
 namespace internal {
@@ skipping 1058 matching lines @@
       }
 
       for (auto succ : block->successors()) {
         const InstructionBlock* successor = code()->InstructionBlockAt(succ);
         DCHECK(successor->PredecessorCount() == 1);
         int gap_index = successor->first_instruction_index();
         DCHECK(code()->IsGapAt(gap_index));
 
         // Create an unconstrained operand for the same virtual register
         // and insert a gap move from the fixed output to the operand.
-        UnallocatedOperand* output_copy =
-            new (code_zone()) UnallocatedOperand(UnallocatedOperand::ANY);
-        output_copy->set_virtual_register(output_vreg);
+        UnallocatedOperand* output_copy = new (code_zone())
+            UnallocatedOperand(UnallocatedOperand::ANY, output_vreg);
 
         AddGapMove(gap_index, GapInstruction::START, output, output_copy);
       }
     }
 
     if (!assigned) {
       for (auto succ : block->successors()) {
         const InstructionBlock* successor = code()->InstructionBlockAt(succ);
         DCHECK(successor->PredecessorCount() == 1);
         int gap_index = successor->first_instruction_index();
@@ skipping 1383 matching lines @@
   } else {
     DCHECK(range->Kind() == GENERAL_REGISTERS);
     assigned_registers_->Add(reg);
   }
   range->set_assigned_register(reg, code_zone());
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8