gh-128563: A new tail-calling interpreter (GH-128718)

Co-authored-by: Garrett Gu <garrettgu777@gmail.com>
Co-authored-by: blurb-it[bot] <43283697+blurb-it[bot]@users.noreply.github.com>
Co-authored-by: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com>

Python/bytecodes.c

@@ -1387,7 +1387,9 @@ dummy_func(
 
         tier1 inst(CLEANUP_THROW, (sub_iter_st, last_sent_val_st, exc_value_st -- none, value)) {
             PyObject *exc_value = PyStackRef_AsPyObjectBorrow(exc_value_st);
+            #ifndef Py_TAIL_CALL_INTERP
             assert(throwflag);
+            #endif
             assert(exc_value && PyExceptionInstance_Check(exc_value));
 
             int matches = PyErr_GivenExceptionMatches(exc_value, PyExc_StopIteration);
@@ -5305,6 +5307,9 @@ dummy_func(
             }
 #endif
             RELOAD_STACK();
+#ifdef Py_TAIL_CALL_INTERP
+            int opcode;
+#endif
             DISPATCH();
         }
 
@@ -5351,8 +5356,10 @@ dummy_func(
             caller loses its exception */
             assert(!_PyErr_Occurred(tstate));
         #endif
-
             RELOAD_STACK();
+#ifdef Py_TAIL_CALL_INTERP
+            int opcode;
+#endif
             DISPATCH();
         }