Fix incorrect use of compare-exchange.

Author: Yhg1s

Python/bytecodes.c

@@ -297,13 +297,12 @@ dummy_func(
 #if ENABLE_SPECIALIZATION_FT
 #ifdef Py_GIL_DISABLED
             uint8_t expected = LOAD_CONST;
-            _Py_atomic_compare_exchange_uint8(
-                &this_instr->op.code, &expected,
-                _Py_IsImmortal(obj) ? LOAD_CONST_IMMORTAL : LOAD_CONST_MORTAL);
-            // We might lose a race with instrumentation, which we don't care about.
-            assert(expected >= MIN_INSTRUMENTED_OPCODE ||
-                   (expected == LOAD_CONST_IMMORTAL && _Py_IsImmortal(obj)) ||
-                   (expected == LOAD_CONST_MORTAL && !_Py_IsImmortal(obj)));
+            if (!_Py_atomic_compare_exchange_uint8(
+                    &this_instr->op.code, &expected,
+                    _Py_IsImmortal(obj) ? LOAD_CONST_IMMORTAL : LOAD_CONST_MORTAL)) {
+                // We might lose a race with instrumentation, which we don't care about.
+                assert(expected >= MIN_INSTRUMENTED_OPCODE);
+            }
 #else
             if (this_instr->op.code == LOAD_CONST) {
                 this_instr->op.code = _Py_IsImmortal(obj) ? LOAD_CONST_IMMORTAL : LOAD_CONST_MORTAL;