2010-09-16 Richard Guenther <rguenther@suse.de>

2010-09-16  Richard Guenther  <rguenther@suse.de>

	PR tree-optimization/45623
	* tree-ssa-structalias.c (get_constraint_for_ptr_offset): Adjust.
	(get_constraint_for_component_ref): If computing a constraint
	for the rhs handle type punning through unions.
	(get_constraint_for_address_of): Adjust.
	(get_constraint_for_1): Likewise.
	(get_constraint_for): Likewise.
	(get_constraint_for_rhs): New function.
	(do_structure_copy): Adjust.
	(make_constraint_to): Likewise.
	(handle_const_call): Likewise.
	(find_func_aliases): Likewise.
	(process_ipa_clobber): Likewise.
	(create_variable_info_for): Likewise.

	* gcc.dg/torture/pr45623.c: New testcase.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@164333 138bc75d-0d04-0410-961f-82ee72b054a4