[Bug tree-optimization/57584] [4.9 Regression] ice: SSA corruption: Unable to coalesce ssa_names

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57584

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|---                         |FIXED

--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Jun 20 10:22:33 2013
New Revision: 200237

URL: http://gcc.gnu.org/viewcvs?rev=200237&root=gcc&view=rev
Log:
2013-06-20  Richard Biener  <rguenther@suse.de>

    PR tree-optimization/57584
    * tree-ssa-loop-niter.c (expand_simple_operations): Avoid including
    SSA names into the expanded expression that take part in
    abnormal coalescing.

    * gcc.dg/torture/pr57584.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr57584.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-loop-niter.c