[Interpreter] Textual representation for runtime function IDs.

src/interpreter/bytecodes.h

Index: src/interpreter/bytecodes.h
diff --git a/src/interpreter/bytecodes.h b/src/interpreter/bytecodes.h
index d4863b1662124f18ebe2676edc004300d24ada24..d892bdbb142aab337d2cf76fbc6133f8acc01735 100644
--- a/src/interpreter/bytecodes.h
+++ b/src/interpreter/bytecodes.h
@@ -478,6 +478,9 @@ class Bytecodes {
   // Returns true if the bytecode is a call or a constructor call.
   static bool IsCallOrNew(Bytecode bytecode);
 
+  // Returns true if the bytecode is a call to the runtime.
+  static bool IsCallRuntime(Bytecode bytecode);
+
   // Returns true if the bytecode is a debug break.
   static bool IsDebugBreak(Bytecode bytecode);