[Bug target/87288] [8 Regression] Segfault after const_cast with "-O2 -ftree-loop-vectorize" but _without_ "-mavx"

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87288

--- Comment #16 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Dec  5 12:19:32 2018
New Revision: 266822

URL: https://gcc.gnu.org/viewcvs?rev=266822&root=gcc&view=rev
Log:
2018-12-05  Richard Biener  <rguenther@suse.de>

        Backport from mainline
        2018-09-20  Richard Sandiford  <richard.sandiford@arm.com>

        PR tree-optimization/87288
        * tree-vect-loop.c (vect_analyze_loop_2): Take PEELING_FOR_GAPS
        into account when determining PEELING_FOR_NITERS.

        * gcc.dg/vect/pr87288-1.c: New test.
        * gcc.dg/vect/pr87288-2.c: Likewise,
        * gcc.dg/vect/pr87288-3.c: Likewise.

Added:
    branches/gcc-8-branch/gcc/testsuite/gcc.dg/vect/pr87288-1.c
    branches/gcc-8-branch/gcc/testsuite/gcc.dg/vect/pr87288-2.c
    branches/gcc-8-branch/gcc/testsuite/gcc.dg/vect/pr87288-3.c
Modified:
    branches/gcc-8-branch/gcc/ChangeLog
    branches/gcc-8-branch/gcc/testsuite/ChangeLog
    branches/gcc-8-branch/gcc/tree-vect-loop.c