2011-07-06  Richard Guenther  <rguenther@suse.de>

	PR tree-optimization/49645
	* c-decl.c (finish_decl): Also set DECL_HARD_REGISTER for global
	register variables.
	* tree-ssa-sccvn.c (vn_reference_op_eq): Disregard differences
	in type qualification here ...
	(copy_reference_ops_from_ref): ... not here.
	(vn_reference_lookup_3): ... or here.
	(copy_reference_ops_from_ref): Record decl bases as MEM[&decl].
	(vn_reference_lookup): Do the lookup with a valueized ao-ref.

	* g++.dg/tree-ssa/pr8781.C: Disable SRA.

From-SVN: r175916