[turbofan]: Fix double register output in traces

src/compiler/instruction.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/common-operator.h"
 #include "src/compiler/graph.h"
 #include "src/compiler/instruction.h"
 #include "src/compiler/schedule.h"
 
 namespace v8 {
@@ skipping 101 matching lines @@
           os << "[stack:" << StackSlotOperand::cast(op).index();
           break;
         case AllocatedOperand::DOUBLE_STACK_SLOT:
           os << "[double_stack:" << DoubleStackSlotOperand::cast(op).index();
           break;
         case AllocatedOperand::REGISTER:
           os << "[" << RegisterOperand::cast(op).GetRegister().ToString()
              << "|R";
           break;
         case AllocatedOperand::DOUBLE_REGISTER:
-          os << "[" << DoubleRegisterOperand::cast(op).GetRegister().ToString()
+          os << "["
+             << DoubleRegisterOperand::cast(op).GetDoubleRegister().ToString()
              << "|R";
           break;
       }
       switch (allocated.machine_type()) {
         case kRepWord32:
           os << "|w32";
           break;
         case kRepWord64:
           os << "|w64";
           break;
@@ skipping 742 matching lines @@
       os << " B" << succ.ToInt();
     }
     os << "\n";
   }
   return os;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8