UNARY_NOT

Author: savannahostrowski

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_not_pop_top_load_const_inline_borrow(self):
+        def testfunc(n):
+                x = 0
+                for i in range(n):
+                    a = 42
+                    result = not a
+                    if result:
+                        x += 1
+                return x
+
+        res, ex = self._run_with_optimizer(testfunc, TIER2_THRESHOLD)
+        self.assertEqual(res, 0)
+        self.assertIsNotNone(ex)
+        uops = get_opnames(ex)
+        self.assertNotIn("_UNARY_NOT", uops)
+        self.assertNotIn("_POP_TOP_LOAD_CONST_INLINE_BORROW", uops)
+
     def test_replace_with_true_pop_top_load_const_inline_borrow(self):
         def testfunc(n):
             x = 0

Python/optimizer_bytecodes.c

@@ -398,6 +398,7 @@ dummy_func(void) {
     }
 
     op(_UNARY_NEGATIVE, (value -- res)) {
+        REPLACE_OPCODE_IF_EVALUATES_PURE(value);
         if (sym_is_compact_int(value)) {
             res = sym_new_compact_int(ctx);
         }