re PR c++/40389 (optimizer bug (possibly))

re PR c++/40389 (optimizer bug (possibly))

2009-06-14  Richard Guenther  <rguenther@suse.de>

	PR middle-end/40389
	* gimple.c (walk_stmt_load_store_addr_ops): The LHS of a call
	has its address taken if NRV was applied and it is addressable.
	* tree-ssa-structalias.c (get_constraint_for_address_of): New
	function split out from ...
	(get_constraint_for_1): ... here.
	(handle_rhs_call): Use it to mark the return slot escaped if
	it is addressable and NRV was applied.

	* g++.dg/torture/pr40389.C: New testcase.

From-SVN: r148462