gh-92777: Add LOAD_METHOD_LAZY_DICT (GH-92778)

1 files changed, 23 insertions, 0 deletions

diff --git a/Python/ceval.c b/Python/ceval.c
index e82f734..56b1017 100644
--- a/Python/ceval.c
+++ b/Python/ceval.c
@@ -4673,6 +4673,29 @@ handle_eval_breaker:
             NOTRACE_DISPATCH();
         }
 
+        TARGET(LOAD_METHOD_LAZY_DICT) {
+            assert(cframe.use_tracing == 0);
+            PyObject *self = TOP();
+            PyTypeObject *self_cls = Py_TYPE(self);
+            _PyLoadMethodCache *cache = (_PyLoadMethodCache *)next_instr;
+            uint32_t type_version = read_u32(cache->type_version);
+            DEOPT_IF(self_cls->tp_version_tag != type_version, LOAD_METHOD);
+            int dictoffset = cache->dict_offset;
+            PyObject *dict = *(PyObject **)((char *)self + dictoffset);
+            assert(dictoffset == self_cls->tp_dictoffset && dictoffset > 0);
+            /* This object has a __dict__, just not yet created */
+            DEOPT_IF(dict != NULL, LOAD_METHOD);
+            STAT_INC(LOAD_METHOD, hit);
+            PyObject *res = read_obj(cache->descr);
+            assert(res != NULL);
+            assert(_PyType_HasFeature(Py_TYPE(res), Py_TPFLAGS_METHOD_DESCRIPTOR));
+            Py_INCREF(res);
+            SET_TOP(res);
+            PUSH(self);
+            JUMPBY(INLINE_CACHE_ENTRIES_LOAD_METHOD);
+            NOTRACE_DISPATCH();
+        }
+
         TARGET(LOAD_METHOD_MODULE) {
             /* LOAD_METHOD, for module methods */
             assert(cframe.use_tracing == 0);