re PR middle-end/38151 (structures with _Complex arguments are not passed correctly)

re PR middle-end/38151 (structures with _Complex arguments are not passed correctly)

2008-11-25  Richard Guenther  <rguenther@suse.de>

	PR middle-end/38151
	PR middle-end/38236
	* tree-ssa-alias.c (struct alias_info): Remove written_vars.
	Remove dereferenced_ptrs_store and dereferenced_ptrs_load
	in favor of dereferenced_ptrs.
	(init_alias_info): Adjust.
	(delete_alias_info): Likewise.
	(compute_flow_insensitive_aliasing): Properly
	include all aliased variables.
	(update_alias_info_1): Use dereferenced_ptrs.
	(setup_pointers_and_addressables): Likewise.
	(get_smt_for): Honor ref-all pointers and pointers with known alias
	set properly.
	* config/i386/i386.c (ix86_gimplify_va_arg): Use ref-all pointers.

	* gcc.c-torture/execute/pr38151.c: New testcase.
	* gcc.c-torture/execute/pr38236.c: Likewise.

From-SVN: r142189