[interpreter] VisitForTest for bytecode generator

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 2f89c4806d96c60c2aa455ebab2525bd80a21a9e..f10a8638a494af6b4554b148f963f89d06b33109 100644
--- a/src/interpreter/bytecode-label.h
+++ b/src/interpreter/bytecode-label.h
@@ -5,10 +5,14 @@
 #ifndef V8_INTERPRETER_BYTECODE_LABEL_H_
 #define V8_INTERPRETER_BYTECODE_LABEL_H_
 
+#include "src/zone-containers.h"
+
 namespace v8 {
 namespace internal {
 namespace interpreter {
 
+class BytecodeArrayBuilder;
+
 // A label representing a branch target in a bytecode array. When a
 // label is bound, it represents a known position in the bytecode
 // array. For labels that are forward references there can be at most
@@ -49,6 +53,21 @@ class BytecodeLabel final {
   friend class BytecodeArrayWriter;
 };
 
+// Class representing a branch target of multiple jumps.
+class BytecodeLabels {
+ public:
+  explicit BytecodeLabels(Zone* zone) : labels_(zone) {}
+
+  BytecodeLabel* New();
+
+  void Bind(BytecodeArrayBuilder* builder);
+
+ private:
+  ZoneVector<BytecodeLabel> labels_;
+
+  DISALLOW_COPY_AND_ASSIGN(BytecodeLabels);
+};
+
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8