From 5d3201fe3f76aeba33e9e5956ba80a116e422bd0 Mon Sep 17 00:00:00 2001
From: Mark Shannon <mark@hotpy.org>
Date: Fri, 23 Aug 2024 10:22:35 +0100
Subject: GH-123040: Specialize shadowed `LOAD_ATTR`. (GH-123219)

---
 Python/bytecodes.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

(limited to 'Python/bytecodes.c')

diff --git a/Python/bytecodes.c b/Python/bytecodes.c
index bc418137a9f..62f6853fedf 100644
--- a/Python/bytecodes.c
+++ b/Python/bytecodes.c
@@ -1936,6 +1936,7 @@ dummy_func(
             LOAD_ATTR_WITH_HINT,
             LOAD_ATTR_SLOT,
             LOAD_ATTR_CLASS,
+            LOAD_ATTR_CLASS_WITH_METACLASS_CHECK,
             LOAD_ATTR_PROPERTY,
             LOAD_ATTR_GETATTRIBUTE_OVERRIDDEN,
             LOAD_ATTR_METHOD_WITH_VALUES,
@@ -2119,7 +2120,6 @@ dummy_func(
             EXIT_IF(!PyType_Check(owner_o));
             assert(type_version != 0);
             EXIT_IF(((PyTypeObject *)owner_o)->tp_version_tag != type_version);
-
         }
 
         split op(_LOAD_ATTR_CLASS, (descr/4, owner -- attr, null if (oparg & 1))) {
@@ -2136,6 +2136,12 @@ dummy_func(
             unused/2 +
             _LOAD_ATTR_CLASS;
 
+        macro(LOAD_ATTR_CLASS_WITH_METACLASS_CHECK) =
+            unused/1 +
+            _CHECK_ATTR_CLASS +
+            _GUARD_TYPE_VERSION +
+            _LOAD_ATTR_CLASS;
+
         op(_LOAD_ATTR_PROPERTY_FRAME, (fget/4, owner -- new_frame: _PyInterpreterFrame *)) {
             assert((oparg & 1) == 0);
             assert(Py_IS_TYPE(fget, &PyFunction_Type));
-- 
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