GCC 4.8-RH has the http://gcc.gnu.org/PR61801 bug that showed up on the Linux kernel as a wrong-code issue.
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://rhn.redhat.com/errata/RHBA-2015-0320.html