[Bug tree-optimization/71352] [7 Regression] ICE at -O1 and above on x86_64-linux-gnu: in zero_one_operation, at tree-ssa-reassoc.c:1251

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71352

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue May 31 12:18:15 2016
New Revision: 236920

URL: https://gcc.gnu.org/viewcvs?rev=236920&root=gcc&view=rev
Log:
2016-05-31  Richard Biener  <rguent...@suse.de>

        PR tree-optimization/71352
        * tree-ssa-reassoc.c (zero_one_operation): Handle op equal to
        minus one and a negate.

        * gcc.dg/tree-ssa/reassoc-45.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/tree-ssa/reassoc-45.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-reassoc.c