[Interpreter] Implement ForIn in bytecode graph builder.

src/interpreter/control-flow-builders.h

 // 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.
 
 #ifndef V8_INTERPRETER_CONTROL_FLOW_BUILDERS_H_
 #define V8_INTERPRETER_CONTROL_FLOW_BUILDERS_H_
 
 #include "src/interpreter/bytecode-array-builder.h"
 
 #include "src/zone-containers.h"
@@ skipping 42 matching lines @@
   void EmitJump(ZoneVector<BytecodeLabel>* labels, int index);
   void EmitJumpIfTrue(ZoneVector<BytecodeLabel>* labels);
   void EmitJumpIfTrue(ZoneVector<BytecodeLabel>* labels, int index);
   void EmitJumpIfFalse(ZoneVector<BytecodeLabel>* labels);
   void EmitJumpIfFalse(ZoneVector<BytecodeLabel>* labels, int index);
   void EmitJumpIfUndefined(ZoneVector<BytecodeLabel>* labels);
   void EmitJumpIfNull(ZoneVector<BytecodeLabel>* labels);
 
   void BindLabels(const BytecodeLabel& target, ZoneVector<BytecodeLabel>* site);
 
- private:
   // Unbound labels that identify jumps for break statements in the code.
   ZoneVector<BytecodeLabel> break_sites_;
 };
 
 
 // Class to track control flow for block statements (which can break in JS).
 class BlockBuilder final : public BreakableControlFlowBuilder {
  public:
   explicit BlockBuilder(BytecodeArrayBuilder* builder)
       : BreakableControlFlowBuilder(builder) {}
 
   void EndBlock();
 
  private:
   BytecodeLabel block_end_;
 };
 
 
 // A class to help with co-ordinating break and continue statements with
 // their loop.
 class LoopBuilder final : public BreakableControlFlowBuilder {
  public:
   explicit LoopBuilder(BytecodeArrayBuilder* builder)
       : BreakableControlFlowBuilder(builder),
         continue_sites_(builder->zone()) {}
   ~LoopBuilder();
 
-  void LoopHeader() { builder()->Bind(&loop_header_); }
+  void LoopHeader();
   void Condition() { builder()->Bind(&condition_); }
   void Next() { builder()->Bind(&next_); }
   void JumpToHeader() { builder()->Jump(&loop_header_); }
   void JumpToHeaderIfTrue() { builder()->JumpIfTrue(&loop_header_); }
   void EndLoop();
 
   // This method is called when visiting continue statements in the AST.
   // Inserts a jump to a unbound label that is patched when the corresponding
   // SetContinueTarget is called.
   void Continue() { EmitJump(&continue_sites_); }
@@ skipping 41 matching lines @@
  private:
   // Unbound labels that identify jumps for case statements in the code.
   ZoneVector<BytecodeLabel> case_sites_;
 };
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_INTERPRETER_CONTROL_FLOW_BUILDERS_H_