r148747 - in /trunk/gcc: ChangeLog tree-ssa-ali...

[rguenth@gcc.gnu.org]

Author: rguenth
Date: Sat Jun 20 12:03:16 2009
New Revision: 148747

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=148747
Log:
2009-06-20  Richard Guenther  <rguenther@suse.de>

	* tree-ssa-structalias.c (find_func_aliases): For memset use
	a constraint from NULL if we memset to zero.
	* tree-ssa-alias.c (ref_maybe_used_by_call_p_1): Add builtins
	we explicitly handle that do not read from memory.
	(call_may_clobber_ref_p_1): Properly handle builtins that may
	set errno.

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