UNARY_NEGATIVE

python · savannahostrowski · Jul 26, 2025 · Jul 29, 2025 · Jul 31, 2025 · Jul 31, 2025
commit e7a1e7ea473219b2add60e7b6f7551797c23e51a
diff --git a/Lib/test/test_capi/test_opt.py b/Lib/test/test_capi/test_opt.py
@@ -1614,6 +1614,23 @@ def f(n):
         # But all of the appends we care about are still there:
         self.assertEqual(uops.count("_CALL_LIST_APPEND"), len("ABCDEFG"))
 
+    def test_unary_negative_pop_top_load_const_inline_borrow(self):
+        def testfunc(n):
+            x = 0
+            for i in range(n):
+                a = 1  # This will make -1, which is definitely immortal
+                result = -a
+                if result < 0:
+                    x += 1
+            return x
+
+        res, ex = self._run_with_optimizer(testfunc, TIER2_THRESHOLD)
+        self.assertEqual(res, TIER2_THRESHOLD)
+        self.assertIsNotNone(ex)
+        uops = get_opnames(ex)
+        self.assertNotIn("_UNARY_NEGATIVE", uops)
+        self.assertNotIn("_POP_TOP_LOAD_CONST_INLINE_BORROW", uops)
+
     def test_unary_not_pop_top_load_const_inline_borrow(self):
         def testfunc(n):
                 x = 0