First simple implementation of for-of in TurboFan.

src/compiler/control-builders.h

 // 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.
 
 #ifndef V8_COMPILER_CONTROL_BUILDERS_H_
 #define V8_COMPILER_CONTROL_BUILDERS_H_
 
 #include "src/v8.h"
 
 #include "src/compiler/graph-builder.h"
@@ skipping 59 matching lines @@
 
   // Primitive control commands.
   void BeginLoop(BitVector* assigned, bool is_osr = false);
   void EndBody();
   void EndLoop();
 
   // Primitive support for break and continue.
   void Continue() FINAL;
   void Break() FINAL;
 
-  // Compound control command for conditional break.
+  // Compound control commands for conditional break.
   void BreakUnless(Node* condition);
+  void BreakWhen(Node* condition);
 
  private:
   Environment* loop_environment_;      // Environment of the loop header.
   Environment* continue_environment_;  // Environment after the loop body.
   Environment* break_environment_;     // Environment after the loop exits.
 };
 
 
 // Tracks control flow for a switch statement.
 class SwitchBuilder FINAL : public ControlBuilder {
@@ skipping 43 matching lines @@
 
  private:
   Environment* break_environment_;  // Environment after the block exits.
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_CONTROL_BUILDERS_H_