From 03d2f035d6dcfeee0c39b4b8a3ddb4dda01cddb6 Mon Sep 17 00:00:00 2001
From: Wulian233 <1055917385@qq.com>
Date: Sun, 12 Apr 2026 21:07:19 +0800
Subject: [PATCH] gh-131798: Add `_CHECK_IS_NOT_PY_CALLABLE` to the JIT
 optimizer (GH-148434)

---
 Lib/test/test_capi/test_opt.py | 15 +++++++++++++++
 Python/optimizer_bytecodes.c   |  7 +++++++
 Python/optimizer_cases.c.h     |  6 ++++++
 3 files changed, 28 insertions(+)

diff --git a/Lib/test/test_capi/test_opt.py b/Lib/test/test_capi/test_opt.py
index f11413cc6254..2678a620763b 100644
--- a/Lib/test/test_capi/test_opt.py
+++ b/Lib/test/test_capi/test_opt.py
@@ -2755,6 +2755,21 @@ class TestUopsOptimization(unittest.TestCase):
         self.assertNotIn("_GUARD_TOS_INT", uops)
         self.assertIn("_POP_TOP_NOP", uops)
 
+    def test_check_is_not_py_callable(self):
+        def testfunc(n):
+            total = 0
+            f = len
+            xs = (1, 2, 3)
+            for _ in range(n):
+                total += f(xs)
+            return total
+
+        res, ex = self._run_with_optimizer(testfunc, TIER2_THRESHOLD)
+        self.assertEqual(res, 3 * TIER2_THRESHOLD)
+        self.assertIsNotNone(ex)
+        uops = get_opnames(ex)
+        self.assertNotIn("_CHECK_IS_NOT_PY_CALLABLE", uops)
+
     def test_call_len_string(self):
         def testfunc(n):
             for _ in range(n):
diff --git a/Python/optimizer_bytecodes.c b/Python/optimizer_bytecodes.c
index 39dc4877af88..6e5af4793419 100644
--- a/Python/optimizer_bytecodes.c
+++ b/Python/optimizer_bytecodes.c
@@ -1217,6 +1217,13 @@ dummy_func(void) {
         (void)framesize;
     }
 
+    op(_CHECK_IS_NOT_PY_CALLABLE, (callable, unused, unused[oparg] -- callable, unused, unused[oparg])) {
+        PyTypeObject *type = sym_get_type(callable);
+        if (type && type != &PyFunction_Type && type != &PyMethod_Type) {
+            ADD_OP(_NOP, 0, 0);
+        }
+    }
+
     op(_PUSH_FRAME, (new_frame -- )) {
         SYNC_SP();
         if (!CURRENT_FRAME_IS_INIT_SHIM()) {
diff --git a/Python/optimizer_cases.c.h b/Python/optimizer_cases.c.h
index 746653906874..d90ad285a11f 100644
--- a/Python/optimizer_cases.c.h
+++ b/Python/optimizer_cases.c.h
@@ -3651,6 +3651,12 @@
         }
 
         case _CHECK_IS_NOT_PY_CALLABLE: {
+            JitOptRef callable;
+            callable = stack_pointer[-2 - oparg];
+            PyTypeObject *type = sym_get_type(callable);
+            if (type && type != &PyFunction_Type && type != &PyMethod_Type) {
+                ADD_OP(_NOP, 0, 0);
+            }
             break;
         }
 
-- 
2.47.3