[interpreter] Use VisitForTest for loop conditions

src/interpreter/bytecode-label.h

Index: src/interpreter/bytecode-label.h
diff --git a/src/interpreter/bytecode-label.h b/src/interpreter/bytecode-label.h
index f10a8638a494af6b4554b148f963f89d06b33109..107c572268dab65b2ef832a7305ab9025141b2a9 100644
--- a/src/interpreter/bytecode-label.h
+++ b/src/interpreter/bytecode-label.h
@@ -62,6 +62,12 @@ class BytecodeLabels {
 
   void Bind(BytecodeArrayBuilder* builder);
 
+  void BindToLabel(BytecodeArrayBuilder* builder, const BytecodeLabel& target);
+
+  bool is_bound() const { return !labels_.empty() && labels_.at(0).is_bound(); }

[rmcilroy, 2016/08/17 16:20:43]

Could you add a DCHECK that if one label is bound then all labels are bound.

[klaasb, 2016/08/18 11:40:00]

Done.

+
+  bool empty() const { return labels_.empty(); }
+
  private:
   ZoneVector<BytecodeLabel> labels_;