[Bug tree-optimization/61607] DOM missed jump threading and destroyed loops

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61607

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Jun 26 07:44:10 2014
New Revision: 212011

URL: https://gcc.gnu.org/viewcvs?rev=212011&root=gcc&view=rev
Log:
2014-06-26  Richard Biener  <rguenther@suse.de>

    PR tree-optimization/61607
    * tree-ssa-threadupdate.c (ssa_redirect_edges): Cancel the
    loop if we redirected its latch edge.
    (thread_block_1): Do not cancel loops prematurely.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/tree-ssa-threadupdate.c