[Bug tree-optimization/70986] [7 Regression] ICE on valid code at -O3 on x86_64-linux-gnu in combine_blocks, at tree-if-conv.c:2219

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70986

--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu May 12 07:18:58 2016
New Revision: 236158

URL: https://gcc.gnu.org/viewcvs?rev=236158&root=gcc&view=rev
Log:
2016-05-12  Richard Biener  <rguenther@suse.de>

        PR tree-optimization/70986
        * cfganal.c: Include cfgloop.h.
        (dfs_find_deadend): Prefer to take edges exiting loops.

        * gcc.dg/torture/pr70986-1.c: New testcase.
        * gcc.dg/torture/pr70986-2.c: Likewise.
        * gcc.dg/torture/pr70986-3.c: Likewise.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr70986-1.c
    trunk/gcc/testsuite/gcc.dg/torture/pr70986-2.c
    trunk/gcc/testsuite/gcc.dg/torture/pr70986-3.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/cfganal.c
    trunk/gcc/testsuite/ChangeLog