2010-10-18  Richard Guenther  <rguenther@suse.de>

	PR tree-optimization/45967
	* tree-ssa-structalias.c (type_could_have_pointers): Remove.
	(could_have_pointers): Likewise.
	(handle_rhs_call, handle_const_call, handle_pure_call,
	find_func_aliases, intra_create_variable_infos): Remove calls to them.
	(struct fieldoff): Add must_have_pointers field.
	(type_must_have_pointers): New function.
	(field_must_have_pointers): Likewise.
	(push_fields_onto_fieldstack): Remove must_have_pointers_p argument.
	Adjust field merging.
	(create_function_info_for): May-have-pointers of varinfo is
	almost always true.
	(create_variable_info_for_1): Likewise.

	* gcc.dg/torture/pr45967.c: New testcase.
	* gcc.dg/ipa/ipa-pta-10.c: Adjust.
	* gcc.dg/ipa/ipa-pta-13.c: Likewise
	* gcc.dg/torture/pr39074-2.c: Likewise
	* gcc.dg/torture/pta-escape-1.c: Likewise
	* gcc.dg/torture/pta-ptrarith-1.c: Likewise
	* gcc.dg/tree-ssa/pta-callused.c: Likewise
	* gcc.dg/tree-ssa/pta-escape-1.c: Likewise
	* gcc.dg/tree-ssa/pta-escape-2.c: Likewise
	* gcc.dg/tree-ssa/pta-escape-3.c: Likewise
	* gcc.dg/tree-ssa/ssa-pre-21.c: Likewise

From-SVN: r165641