[Bug target/72851] [6/7 Regression] memory hog with -O3 on s390x-linux-gnu

["krebbel at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=72851

Andreas Krebbel <krebbel at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2016-08-10
     Ever confirmed|0                           |1

--- Comment #1 from Andreas Krebbel <krebbel at gcc dot gnu.org> ---
Reghunt indicates that this was introduced with:

Author: rguenth
Date: Tue Jul  7 07:59:40 2015
New Revision: 225504

URL: https://gcc.gnu.org/viewcvs?rev=225504&root=gcc&view=rev
Log:
2015-07-07  Richard Biener  <rguenther@suse.de>

        * tree-ssa-propagate.c (add_ssa_edge): Dump what edge list we
        add which use to.
        (add_control_edge): Remove excessive vertical space in dumping.
        (process_ssa_edge_worklist): Simulate at most one statement and
        return whether we did.  Do not simulate PHIs if they are in a
        BB not yet simulated.
        (ssa_propagate): Adjust to always drain the BB worklist whenever
        a BB is available there, likewise the VARYING edges list before
        the interesting edge list.