2012-09-11  Richard Guenther  <rguenther@suse.de>

	PR middle-end/54515
	* gimple.c (get_base_address): Do not return NULL_TREE apart
	from for WITH_SIZE_EXPR.
	* gimple-fold.c (canonicalize_constructor_val): Do not call
	get_base_address when not necessary.

	* g++.dg/tree-ssa/pr54515.C: New testcase.

From-SVN: r191174