[Bug tree-optimization/68060] [6 Regression] ICE on valid code at -O3 on x86_64-linux-gnu in vect_get_vec_def_for_operand, at tree-vect-stmts.c:1413

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68060

--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Jan 14 15:13:19 2016
New Revision: 232367

URL: https://gcc.gnu.org/viewcvs?rev=232367&root=gcc&view=rev
Log:
2016-01-14  Richard Biener  <rguent...@suse.de>

        PR tree-optimization/68060
        * tree-vect-loop.c (vect_is_simple_reduction): Check the
        outer loop reduction is only used in the inner loop before
        detecting a double reduction.

        * gcc.dg/torture/pr68060-1.c: New testcase.
        * gcc.dg/torture/pr68060-2.c: Likewise.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr68060-1.c
    trunk/gcc/testsuite/gcc.dg/torture/pr68060-2.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-vect-loop.c