GH-118095: Add tier two support for BINARY_SUBSCR_GETITEM (GH-120793)

Author: markshannon

Include/internal/pycore_opcode_metadata.h

@@ -259,6 +259,16 @@ PyAPI_FUNC(PyObject *) _Py_uop_symbols_test(PyObject *self, PyObject *ignored);
 
 PyAPI_FUNC(int) _PyOptimizer_Optimize(struct _PyInterpreterFrame *frame, _Py_CODEUNIT *start, _PyStackRef *stack_pointer, _PyExecutorObject **exec_ptr);
 
+static inline int is_terminator(const _PyUOpInstruction *uop)
+{
+    int opcode = uop->opcode;
+    return (
+        opcode == _EXIT_TRACE ||
+        opcode == _JUMP_TO_TOP ||
+        opcode == _DYNAMIC_EXIT
+    );
+}
+
 #ifdef __cplusplus
 }
 #endif