[Bug tree-optimization/61221] [4.10 Regression] ICE on valid code at -O1 and above on x86_64-linux-gnu

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61221

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon May 19 14:33:31 2014
New Revision: 210614

URL: http://gcc.gnu.org/viewcvs?rev=210614&root=gcc&view=rev
Log:
2014-05-19  Richard Biener  <rguent...@suse.de>

    PR tree-optimization/61221
    * tree-ssa-pre.c (eliminate_dom_walker::before_dom_children):
    Do nothing for unreachable blocks.
    * tree-ssa-sccvn.c (cond_dom_walker::before_dom_children):
    Improve unreachability detection.

    * gcc.dg/torture/pr61221.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr61221.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-pre.c
    trunk/gcc/tree-ssa-sccvn.c