signbit', and attempt to change the PLUS to an XOR and move it to
the outer operation as is done above in the AND/IOR/XOR case
leg for shift(logical). See details in logical handling above
- for reasoning in doing so. */
+ for reasoning in doing so. */
if (code == LSHIFTRT
&& GET_CODE (XEXP (varop, 1)) == CONST_INT
&& mode_signbit_p (result_mode, XEXP (varop, 1))