[Bug tree-optimization/69166] [4.9/5/6 Regression] ICE in get_initial_def_for_reduction, at tree-vect-loop.c:4188

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69166

--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Jan 27 14:54:03 2016
New Revision: 232878

URL: https://gcc.gnu.org/viewcvs?rev=232878&root=gcc&view=rev
Log:
2016-01-27  Richard Biener  <rguenther@suse.de>

        PR tree-optimization/69166
        * tree-vect-loop.c (vect_is_simple_reduction): Always check
        reduction code for commutativity / associativity.

        * gcc.dg/torture/pr69166.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr69166.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-vect-loop.c