r176745 - in /trunk/gcc: ChangeLog tree-ssa-for...

[rguenth@gcc.gnu.org]

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