2008-07-01  Richard Guenther  <rguenther@suse.de>

	PR tree-optimization/36666
	* tree-ssa-structalias.c (get_constraint_for_1): Declare.
	(get_constraint_exp_from_ssa_var): Split into ...
	(get_constraint_exp_for_temp): ... this ...
	(get_constraint_for_ssa_var): ... and that.
	Return constraint expressions for all touched sub-fields
	if the results address is not taken.
	(process_constraint): Remove assertion that aggregate
	assignments do not happen at this place.
	(get_constraint_for_component_ref): Add address_p argument.
	Return constraint expressions for all touched sub-fields
	if the results address is not taken.
	(do_deref): Use get_constraint_exp_for_temp.
	(get_constraint_for_1): Rename from ...
	(get_constraint_for): ... this.  Add the old function as
	wrapper.
	(do_structure_copy): Use get_constraint_for_1.

	* gcc.c-torture/compile/pr36666.c: New testcase.

From-SVN: r137315