[turbofan] Fix loop exit rename for return/throw.

src/compiler/control-builders.cc

 // Copyright 2013 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/control-builders.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
@@ skipping 73 matching lines @@
   control_if.End();
 }
 
 void LoopBuilder::ExitLoop(Node** extra_value_to_rename) {
   if (extra_value_to_rename) {
     environment()->Push(*extra_value_to_rename);
   }
   environment()->PrepareForLoopExit(loop_environment_->GetControlDependency(),
                                     assigned_);
   if (extra_value_to_rename) {
-    environment()->Pop();
+    *extra_value_to_rename = environment()->Pop();
   }
 }
 
 void SwitchBuilder::BeginSwitch() {
   body_environment_ = environment()->CopyAsUnreachable();
   label_environment_ = environment()->CopyAsUnreachable();
   break_environment_ = environment()->CopyAsUnreachable();
 }
 
 
@@ skipping 130 matching lines @@
 }
 
 
 void TryFinallyBuilder::EndFinally() {
   // Nothing to be done here.
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8