add a test

Author: Fidget-Spinner

Lib/test/test_capi/test_opt.py

@@ -2451,6 +2451,21 @@ def testfunc(n):
         self.assertNotIn("_GUARD_TOS_FLOAT", uops)
         self.assertNotIn("_GUARD_NOS_FLOAT", uops)
 
+    def test_binary_op_constant_evaluate(self):
+        def testfunc(n):
+            for _ in range(n):
+                a = 2 ** 65
+
+        testfunc(TIER2_THRESHOLD)
+
+        ex = get_first_executor(testfunc)
+        self.assertIsNotNone(ex)
+        uops = get_opnames(ex)
+
+        # For now.. until we constant propagte it away.
+        self.assertIn("_BINARY_OP", uops)
+
+
 def global_identity(x):
     return x