[Bug tree-optimization/81571] [8 Regression] ICE at -O3 in both 32-bit and 64-bit modes (internal compiler error: in as_a, at is-a.h:192)

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81571

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Jul 27 13:44:51 2017
New Revision: 250626

URL: https://gcc.gnu.org/viewcvs?rev=250626&root=gcc&view=rev
Log:
2017-07-27  Richard Biener  <rguent...@suse.de>

        PR tree-optimization/81571
        * tree-vect-slp.c (vect_build_slp_tree): Properly verify reduction
        PHIs.

        * gcc.dg/torture/pr81571.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr81571.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-vect-slp.c