[Bug tree-optimization/86927] [8/9 Regression] Gcc miscompiles at -O3 on valid code

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86927

--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon Aug 27 14:17:03 2018
New Revision: 263888

URL: https://gcc.gnu.org/viewcvs?rev=263888&root=gcc&view=rev
Log:
2018-08-27  Richard Biener  <rguent...@suse.de>

        PR tree-optimization/86927
        * tree-vect-loop.c (vect_create_epilog_for_reduction): Properly
        use const cond reduction code.

        * gcc.dg/vect/pr86927.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/vect/pr86927.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-vect-loop.c