[Bug tree-optimization/61438] [4.10 Regression] ICE on valid code at -O3 on x86_64-linux-gnu in in loop_preheader_edge, at cfgloop.c:1668

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61438

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue Jun 10 14:18:50 2014
New Revision: 211413

URL: http://gcc.gnu.org/viewcvs?rev=211413&root=gcc&view=rev
Log:
2014-06-10  Richard Biener  <rguent...@suse.de>

    PR tree-optimization/61438
    * tree-ssa-pre.c (eliminate_dom_walker): Add do_pre member.
    (eliminate_dom_walker::before_dom_children): Only try to inhibit
    insertion of IVs if running PRE.
    (eliminate): Adjust.
    (pass_pre::execute): Likewise.
    (pass_fre::execute): Likewise.

    * gcc.dg/torture/pr61438.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr61438.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-pre.c