Tail call from TurboFan into select runtime calls

src/runtime/runtime.h

Index: src/runtime/runtime.h
diff --git a/src/runtime/runtime.h b/src/runtime/runtime.h
index 1e2471cf95287f12ffe4c8132630e5d039fa8c66..2c2f4d3acce1bf3243e9c366e45e599cb420dc50 100644
--- a/src/runtime/runtime.h
+++ b/src/runtime/runtime.h
@@ -874,6 +874,9 @@ class Runtime : public AllStatic {
   // Get the intrinsic function with the given function entry address.
   static const Function* FunctionForEntry(Address ref);
 
+  // Returns whether a runtime call supports being invoked via tail call.
+  static bool SupportsTailCall(FunctionId id);
+
   MUST_USE_RESULT static MaybeHandle<Object> DeleteObjectProperty(
       Isolate* isolate, Handle<JSReceiver> receiver, Handle<Object> key,
       LanguageMode language_mode);