[Bug tree-optimization/63800] [5 Regression] ICE on valid code at -O3 on x86_64-linux-gnu

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63800

--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon Nov 10 14:31:31 2014
New Revision: 217288

URL: https://gcc.gnu.org/viewcvs?rev=217288&root=gcc&view=rev
Log:
2014-11-10  Richard Biener  <rguenther@suse.de>

    PR tree-optimization/63800
    * tree-ssa-pre.c (eliminate_push_avail): Push in a way so
    we can restore the previous availability in after_dom_children.
    (eliminate_dom_walker::after_dom_children): Restore
    previous availability.

    * gcc.dg/torture/pr63800.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr63800.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-pre.c