[interpreter] Add output register to ToName

src/compiler/bytecode-graph-builder.cc

 // Copyright 2015 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/bytecode-graph-builder.h"
 
 #include "src/compiler/bytecode-branch-analysis.h"
 #include "src/compiler/linkage.h"
 #include "src/compiler/operator-properties.h"
 #include "src/interpreter/bytecodes.h"
@@ skipping 1286 matching lines @@
 }
 
 void BytecodeGraphBuilder::VisitTestIn() {
   BuildCompareOp(javascript()->HasProperty());
 }
 
 void BytecodeGraphBuilder::VisitTestInstanceOf() {
   BuildCompareOp(javascript()->InstanceOf());
 }
 
 void BytecodeGraphBuilder::BuildCastOperator(const Operator* js_op) {

[Michael Starzinger, 2016/07/22 10:36:05]

nit: By now the "BuildCastOperator" isn't very helpful anymore since it is only
used once. Can we remove it and just have everything inline at all three
original call sites?

[klaasb, 2016/07/22 11:00:49]

Sure, done.

   FrameStateBeforeAndAfter states(this);
   Node* node = NewNode(js_op, environment()->LookupAccumulator());
   environment()->BindAccumulator(node, &states);
 }
 
 void BytecodeGraphBuilder::VisitToName() {
-  BuildCastOperator(javascript()->ToName());
+  FrameStateBeforeAndAfter states(this);
+  Node* value =
+      NewNode(javascript()->ToName(), environment()->LookupAccumulator());
+  environment()->BindRegister(bytecode_iterator().GetRegisterOperand(0), value,
+                              &states);
 }
 
 void BytecodeGraphBuilder::VisitToObject() {
   BuildCastOperator(javascript()->ToObject());
 }
 
 void BytecodeGraphBuilder::VisitToNumber() {
   FrameStateBeforeAndAfter states(this);
   Node* value =
       NewNode(javascript()->ToNumber(), environment()->LookupAccumulator());
@@ skipping 463 matching lines @@
     // Phi does not exist yet, introduce one.
     value = NewPhi(inputs, value, control);
     value->ReplaceInput(inputs - 1, other);
   }
   return value;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8