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Remove dead code in _PyDict_GetItemHint and rename to _PyDict_LookupIndex (GH-95948)

This commit is contained in:
Matthias Görgens 2022-08-18 17:19:21 +08:00 committed by GitHub
parent 586fc02be5
commit 4a6fa89465
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GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 10 additions and 51 deletions
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2
Include/internal/pycore_dict.h
View File

@ -62,7 +62,7 @@ extern Py_ssize_t _PyDict_KeysSize(PyDictKeysObject *keys);
*/
extern Py_ssize_t _Py_dict_lookup(PyDictObject *mp, PyObject *key, Py_hash_t hash, PyObject **value_addr);
extern Py_ssize_t _PyDict_GetItemHint(PyDictObject *, PyObject *, Py_ssize_t, PyObject **);
extern Py_ssize_t _PyDict_LookupIndex(PyDictObject *, PyObject *);
extern Py_ssize_t _PyDictKeys_StringLookup(PyDictKeysObject* dictkeys, PyObject *key);
extern PyObject *_PyDict_LoadGlobal(PyDictObject *, PyDictObject *, PyObject *);

44
Objects/dictobject.c
View File

@ -1686,50 +1686,12 @@ PyDict_GetItem(PyObject *op, PyObject *key)
}
Py_ssize_t
_PyDict_GetItemHint(PyDictObject *mp, PyObject *key,
Py_ssize_t hint, PyObject **value)
_PyDict_LookupIndex(PyDictObject *mp, PyObject *key)
{
assert(*value == NULL);
PyObject *value;
assert(PyDict_CheckExact((PyObject*)mp));
assert(PyUnicode_CheckExact(key));
if (hint >= 0 && hint < mp->ma_keys->dk_nentries) {
PyObject *res = NULL;
if (DK_IS_UNICODE(mp->ma_keys)) {
PyDictUnicodeEntry *ep = DK_UNICODE_ENTRIES(mp->ma_keys) + (size_t)hint;
if (ep->me_key == key) {
if (mp->ma_keys->dk_kind == DICT_KEYS_SPLIT) {
assert(mp->ma_values != NULL);
res = mp->ma_values->values[(size_t)hint];
}
else {
res = ep->me_value;
}
if (res != NULL) {
*value = res;
return hint;
}
}
}
else {
PyDictKeyEntry *ep = DK_ENTRIES(mp->ma_keys) + (size_t)hint;
if (ep->me_key == key) {
if (mp->ma_keys->dk_kind == DICT_KEYS_SPLIT) {
assert(mp->ma_values != NULL);
res = mp->ma_values->values[(size_t)hint];
}
else {
res = ep->me_value;
}
if (res != NULL) {
*value = res;
return hint;
}
}
}
}
Py_hash_t hash = unicode_get_hash(key);
if (hash == -1) {
hash = PyObject_Hash(key);
@ -1738,7 +1700,7 @@ _PyDict_GetItemHint(PyDictObject *mp, PyObject *key,
}
}
return _Py_dict_lookup(mp, key, hash, value);
return _Py_dict_lookup(mp, key, hash, &value);
}
/* Same as PyDict_GetItemWithError() but with hash supplied by caller.

15
Python/specialize.c
View File

@ -511,7 +511,6 @@ specialize_module_load_attr(PyObject *owner, _Py_CODEUNIT *instr,
{
_PyAttrCache *cache = (_PyAttrCache *)(instr + 1);
PyModuleObject *m = (PyModuleObject *)owner;
PyObject *value = NULL;
assert((owner->ob_type->tp_flags & Py_TPFLAGS_MANAGED_DICT) == 0);
PyDictObject *dict = (PyDictObject *)m->md_dict;
if (dict == NULL) {
@ -522,14 +521,13 @@ specialize_module_load_attr(PyObject *owner, _Py_CODEUNIT *instr,
SPECIALIZATION_FAIL(opcode, SPEC_FAIL_ATTR_NON_STRING_OR_SPLIT);
return -1;
}
Py_ssize_t index = _PyDict_GetItemHint(dict, &_Py_ID(__getattr__), -1,
&value);
Py_ssize_t index = _PyDict_LookupIndex(dict, &_Py_ID(__getattr__));
assert(index != DKIX_ERROR);
if (index != DKIX_EMPTY) {
SPECIALIZATION_FAIL(opcode, SPEC_FAIL_ATTR_MODULE_ATTR_NOT_FOUND);
return -1;
}
index = _PyDict_GetItemHint(dict, name, -1, &value);
index = _PyDict_LookupIndex(dict, name);
assert (index != DKIX_ERROR);
if (index != (uint16_t)index) {
SPECIALIZATION_FAIL(opcode, SPEC_FAIL_OUT_OF_RANGE);
@ -703,14 +701,13 @@ specialize_dict_access(
return 0;
}
// We found an instance with a __dict__.
PyObject *value = NULL;
Py_ssize_t hint =
_PyDict_GetItemHint(dict, name, -1, &value);
if (hint != (uint16_t)hint) {
Py_ssize_t index =
_PyDict_LookupIndex(dict, name);
if (index != (uint16_t)index) {
SPECIALIZATION_FAIL(base_op, SPEC_FAIL_OUT_OF_RANGE);
return 0;
}
cache->index = (uint16_t)hint;
cache->index = (uint16_t)index;
write_u32(cache->version, type->tp_version_tag);
_Py_SET_OPCODE(*instr, hint_op);
}