2011-12-05 Richard Guenther <rguenther@suse.de>

2011-12-05  Richard Guenther  <rguenther@suse.de>

	* tree-ssa-alias.h (struct ao_ref_s): Add volatile_p field.
	* tree-ssa-alias.c (ao_ref_init): Initialize it.
	(ao_ref_init_from_ptr_and_size): Likewise.
	(refs_may_alias_p_1): Two volatile accesses conflict.
	(ref_maybe_used_by_call_p_1): Likewise.
	(call_may_clobber_ref_p_1): Likewise.
	* tree-ssa-sccvn.c (ao_ref_init_from_vn_reference): Initialize
	volatile_p field.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@182009 138bc75d-0d04-0410-961f-82ee72b054a4