* tree.h (alias_sets_might_conflict_p): Rename into
	alias_sets_must_conflict_p.
	* alias.c (alias_sets_might_conflict_p): Likewise.
	(alias_sets_conflict_p): Use it.
	(objects_must_conflict_p): Likewise.
	* c-common.c (strict_aliasing_warning): Adjust.

From-SVN: r126233