gh-131306: Remove unused code related to BINARY_SUBSCR (#131307)

Author: tomasr8

Diff for: Include/cpython/object.h

@@ -256,7 +256,7 @@ struct _specialization_cache {
     // - If getitem is NULL, then getitem_version is meaningless.
     // - If getitem->func_version == getitem_version, then getitem can be called
     //   with two positional arguments and no keyword arguments, and has neither
-    //   *args nor **kwargs (as required by BINARY_SUBSCR_GETITEM):
+    //   *args nor **kwargs (as required by BINARY_OP_SUBSCR_GETITEM):
     PyObject *getitem;
     uint32_t getitem_version;
     PyObject *init;

Diff for: Include/internal/pycore_code.h

@@ -118,12 +118,6 @@ typedef struct {
 
 #define INLINE_CACHE_ENTRIES_COMPARE_OP CACHE_ENTRIES(_PyCompareOpCache)
 
-typedef struct {
-    _Py_BackoffCounter counter;
-} _PyBinarySubscrCache;
-
-#define INLINE_CACHE_ENTRIES_BINARY_SUBSCR CACHE_ENTRIES(_PyBinarySubscrCache)
-
 typedef struct {
     _Py_BackoffCounter counter;
 } _PySuperAttrCache;

Diff for: InternalDocs/frames.md

@@ -126,7 +126,7 @@ to see in an exception traceback.
 The `return_offset` field determines where a `RETURN` should go in the caller,
 relative to `instr_ptr`.  It is only meaningful to the callee, so it needs to
 be set in any instruction that implements a call (to a Python function),
-including CALL, SEND and BINARY_SUBSCR_GETITEM, among others. If there is no
+including CALL, SEND and BINARY_OP_SUBSCR_GETITEM, among others. If there is no
 callee, then return_offset is meaningless. It is necessary to have a separate
 field for the return offset because (1) if we apply this offset to `instr_ptr`
 while executing the `RETURN`, this is too early and would lose us information

Diff for: Lib/opcode.py

@@ -63,9 +63,6 @@
     "CONTAINS_OP": {
         "counter": 1,
     },
-    "BINARY_SUBSCR": {
-        "counter": 1,
-    },
     "FOR_ITER": {
         "counter": 1,
     },

Diff for: Lib/test/test_opcache.py

@@ -1706,7 +1706,7 @@ def binary_subscr_list_int():
         binary_subscr_list_int()
         self.assert_specialized(binary_subscr_list_int,
                                 "BINARY_OP_SUBSCR_LIST_INT")
-        self.assert_no_opcode(binary_subscr_list_int, "BINARY_SUBSCR")
+        self.assert_no_opcode(binary_subscr_list_int, "BINARY_OP")
 
         def binary_subscr_tuple_int():
             for _ in range(_testinternalcapi.SPECIALIZATION_THRESHOLD):
@@ -1717,7 +1717,7 @@ def binary_subscr_tuple_int():
         binary_subscr_tuple_int()
         self.assert_specialized(binary_subscr_tuple_int,
                                 "BINARY_OP_SUBSCR_TUPLE_INT")
-        self.assert_no_opcode(binary_subscr_tuple_int, "BINARY_SUBSCR")
+        self.assert_no_opcode(binary_subscr_tuple_int, "BINARY_OP")
 
         def binary_subscr_dict():
             for _ in range(_testinternalcapi.SPECIALIZATION_THRESHOLD):
@@ -1737,7 +1737,7 @@ def binary_subscr_str_int():
 
         binary_subscr_str_int()
         self.assert_specialized(binary_subscr_str_int, "BINARY_OP_SUBSCR_STR_INT")
-        self.assert_no_opcode(binary_subscr_str_int, "BINARY_SUBSCR")
+        self.assert_no_opcode(binary_subscr_str_int, "BINARY_OP")
 
         def binary_subscr_getitems():
             class C:
@@ -1752,7 +1752,7 @@ def __getitem__(self, item):
 
         binary_subscr_getitems()
         self.assert_specialized(binary_subscr_getitems, "BINARY_OP_SUBSCR_GETITEM")
-        self.assert_no_opcode(binary_subscr_getitems, "BINARY_SUBSCR")
+        self.assert_no_opcode(binary_subscr_getitems, "BINARY_OP")
 
     @cpython_only
     @requires_specialization_ft