gh-142908: Don't use DK_IS_UNICODE in interpreter (gh-142909)

`DK_IS_UNICODE()` includes split keys and we don't want to specialize on
those accesses..

Author: colesbury

Python/bytecodes.c

@@ -1844,7 +1844,7 @@ dummy_func(
             DEOPT_IF(!PyDict_CheckExact(dict));
             PyDictKeysObject *keys = FT_ATOMIC_LOAD_PTR_ACQUIRE(dict->ma_keys);
             DEOPT_IF(FT_ATOMIC_LOAD_UINT32_RELAXED(keys->dk_version) != version);
-            assert(DK_IS_UNICODE(keys));
+            assert(keys->dk_kind == DICT_KEYS_UNICODE);
         }
 
         op(_LOAD_GLOBAL_MODULE, (version/1, unused/1, index/1 -- res))
@@ -1853,7 +1853,7 @@ dummy_func(
             DEOPT_IF(!PyDict_CheckExact(dict));
             PyDictKeysObject *keys = FT_ATOMIC_LOAD_PTR_ACQUIRE(dict->ma_keys);
             DEOPT_IF(FT_ATOMIC_LOAD_UINT32_RELAXED(keys->dk_version) != version);
-            assert(DK_IS_UNICODE(keys));
+            assert(keys->dk_kind == DICT_KEYS_UNICODE);
             PyDictUnicodeEntry *entries = DK_UNICODE_ENTRIES(keys);
             assert(index < DK_SIZE(keys));
             PyObject *res_o = FT_ATOMIC_LOAD_PTR_RELAXED(entries[index].me_value);
@@ -1873,7 +1873,7 @@ dummy_func(
             DEOPT_IF(!PyDict_CheckExact(dict));
             PyDictKeysObject *keys = FT_ATOMIC_LOAD_PTR_ACQUIRE(dict->ma_keys);
             DEOPT_IF(FT_ATOMIC_LOAD_UINT32_RELAXED(keys->dk_version) != version);
-            assert(DK_IS_UNICODE(keys));
+            assert(keys->dk_kind == DICT_KEYS_UNICODE);
             PyDictUnicodeEntry *entries = DK_UNICODE_ENTRIES(keys);
             PyObject *res_o = FT_ATOMIC_LOAD_PTR_RELAXED(entries[index].me_value);
             DEOPT_IF(res_o == NULL);
@@ -2668,7 +2668,7 @@ dummy_func(
             assert(PyDict_CheckExact((PyObject *)dict));
             PyObject *name = GETITEM(FRAME_CO_NAMES, oparg);
             if (hint >= (size_t)dict->ma_keys->dk_nentries ||
-                    !DK_IS_UNICODE(dict->ma_keys)) {
+                    dict->ma_keys->dk_kind != DICT_KEYS_UNICODE) {
                 UNLOCK_OBJECT(dict);
                 DEOPT_IF(true);
             }

Python/executor_cases.c.h

@@ -1285,7 +1285,7 @@ specialize_load_global_lock_held(
         goto fail;
     }
     PyDictKeysObject * globals_keys = ((PyDictObject *)globals)->ma_keys;
-    if (!DK_IS_UNICODE(globals_keys)) {
+    if (globals_keys->dk_kind != DICT_KEYS_UNICODE) {
         SPECIALIZATION_FAIL(LOAD_GLOBAL, SPEC_FAIL_LOAD_GLOBAL_NON_STRING_OR_SPLIT);
         goto fail;
     }
@@ -1320,7 +1320,7 @@ specialize_load_global_lock_held(
         goto fail;
     }
     PyDictKeysObject * builtin_keys = ((PyDictObject *)builtins)->ma_keys;
-    if (!DK_IS_UNICODE(builtin_keys)) {
+    if (builtin_keys->dk_kind != DICT_KEYS_UNICODE) {
         SPECIALIZATION_FAIL(LOAD_GLOBAL, SPEC_FAIL_LOAD_GLOBAL_NON_STRING_OR_SPLIT);
         goto fail;
     }