[PING2] [PATCH] Fix PR 31531: A microoptimization of isnegative of signed integer

[Hurugalawadi, Naveen]

Hi,

Please find attached the patch that enhances the existing pattern.

Please review the patch at the following link and let me know
if there should be any modifications in it:-

https://gcc.gnu.org/ml/gcc-patches/2016-02/msg01035.html

Thanks,
Naveen