[Bug tree-optimization/71881] [4.9/6/7 Regression] ICE on valid code at -O3 with -g enabled on x86_64-linux-gnu: cannot update SSA form

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71881

--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Fri Jul 15 13:05:56 2016
New Revision: 238374

URL: https://gcc.gnu.org/viewcvs?rev=238374&root=gcc&view=rev
Log:
2016-07-15  Richard Biener  <rguenther@suse.de>

        PR tree-optimization/71881
        * tree-loop-distribution.c (destroy_loop): Remove blocks in
        reverse DOM order to make debug temp generation happy.

        * gcc.dg/torture/pr71881.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr71881.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-loop-distribution.c