[Bug tree-optimization/57488] [4.9 regression] loop terminates early at -O3

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57488

--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Oct 23 11:59:05 2013
New Revision: 203958

URL: http://gcc.gnu.org/viewcvs?rev=203958&root=gcc&view=rev
Log:
2013-10-23  Richard Biener  <rguent...@suse.de>

    Backport from mainline
    2013-06-24  Richard Biener  <rguent...@suse.de>

    PR tree-optimization/57488
    * tree-ssa-pre.c (insert): Clear NEW sets before each iteration.

    * gcc.dg/torture/pr57488.c: New testcase.

Added:
    branches/gcc-4_8-branch/gcc/testsuite/gcc.dg/torture/pr57488.c
    branches/gcc-4_8-branch/gcc/testsuite/gcc.dg/torture/pr58830.c
Modified:
    branches/gcc-4_8-branch/gcc/ChangeLog
    branches/gcc-4_8-branch/gcc/testsuite/ChangeLog
    branches/gcc-4_8-branch/gcc/tree-ssa-pre.c