r134597 - in /trunk/gcc: ChangeLog alias.c tree...

[rguenth@gcc.gnu.org]

Author: rguenth
Date: Wed Apr 23 14:06:02 2008
New Revision: 134597

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=134597
Log:
2008-04-23  Richard Guenther  <rguenther@suse.de>

	* alias.c (alias_set_subset_of): Correctly handle asking
	if zero is a subset of an alias set with zero child.
	* tree-ssa-alias.c (have_common_aliases_p): Simplify logic.
	(compute_flow_insensitive_aliasing): Correctly walk all
	pointers.  Do not unnecessarily union sets.

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