[Bug tree-optimization/49822] [4.7 regression] Segfault in remove_prop_source_from_use

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49822

--- Comment #2 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-07-25 14:15:06 UTC ---
Author: rguenth
Date: Mon Jul 25 14:15:02 2011
New Revision: 176745

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=176745
Log:
2011-07-25  Richard Guenther  <rguenther@suse.de>

    PR tree-optimization/49822
    * tree-ssa-forwprop.c (remove_prop_source_from_use): Robustify
    more.  Make sure to preserve stmts with side-effects.  Properly
    handle virtual defs, follow a longer def chain.

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