[Bug c/80549] wrong code at -O2 and -O3 in both 32-bit and 64-bit modes on x86_64-linux-gnu (executable does not terminate)

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80549

Marek Polacek <mpolacek at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2017-04-27
                 CC|                            |mpolacek at gcc dot gnu.org
     Ever confirmed|0                           |1

--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Looks like it started with
commit ec969ce4161538b561592a032eca6dcfaf513596
Author: rguenth <rguenth@138bc75d-0d04-0410-961f-82ee72b054a4>
Date:   Thu Aug 11 09:02:04 2016 +0000

    2016-08-11  Richard Biener  <rguent...@suse.de>

            PR tree-optimization/72772
            * cfgloopmanip.c (create_preheader): Use split_edge if there
            is a single loop entry, avoiding degenerate PHIs.

            * gcc.dg/graphite/pr35356-1.c: Adjust.
            * gcc.dg/tree-ssa/pr59597.c: Likewise.


    git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@239357
138bc75d-0d04-0410-961f-82ee72b054a4