[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..d96cf66d13a9dd5352224d184004b11a98dfd503 100644
--- a/src/interpreter/bytecode-label.h
+++ b/src/interpreter/bytecode-label.h
@@ -62,6 +62,18 @@ class BytecodeLabels {
 
   void Bind(BytecodeArrayBuilder* builder);
 
+  void BindToLabel(BytecodeArrayBuilder* builder, const BytecodeLabel& target);
+
+  bool is_bound() const {
+    bool is_bound = !labels_.empty() && labels_.at(0).is_bound();
+    DCHECK(!is_bound ||
+           std::all_of(labels_.begin(), labels_.end(),
+                       [](const BytecodeLabel& l) { return l.is_bound(); }));
+    return is_bound;
+  }
+
+  bool empty() const { return labels_.empty(); }
+
  private:
   ZoneVector<BytecodeLabel> labels_;