[Bug tree-optimization/92558] [10 Regression] Miscompare of 554.roms_r with -Ofast -march=znver2 -flto since r278289

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92558

--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon Nov 18 12:41:11 2019
New Revision: 278400

URL: https://gcc.gnu.org/viewcvs?rev=278400&root=gcc&view=rev
Log:
2019-11-18  Richard Biener  <rguent...@suse.de>

        PR tree-optimization/92558
        * tree-vect-loop.c (vect_create_epilog_for_reduction): When
        reducting the width of a reduction vector def update new_phis.

        * gcc.dg/vect/pr92558.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/vect/pr92558.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-vect-loop.c