re PR tree-optimization/38513 (Only postreload will remove a no-op store)

2009-03-28  Richard Guenther  <rguenther@suse.de>

	PR tree-optimization/38513
	* tree-ssa-pre.c (eliminate): Remove redundant stores.
	* tree-ssa-sccvn.c (copy_reference_ops_from_ref): Handle
	EXC_PTR_EXPR and FILTER_EXPR.
	(get_ref_from_reference_ops): Likewise.

	* gcc.dg/tree-ssa/ssa-fre-21.c: New testcase.
	* gcc.dg/tree-ssa/ssa-dse-11.c: Adjust.
	* gcc.dg/vect/vect-reduc-dot-u8a.c: Likewise.
	* gcc.dg/vect/vect-reduc-dot-u8b.c: Likewise.
	* gcc.dg/vect/slp-widen-mult-u8.c: Likewise.
	* gcc.dg/vect/vect-multitypes-16.c: Likewise.
	* gcc.dg/vect/vect-35.c: Likewise.
	* gcc.dg/vect/wrapv-vect-reduc-dot-s8b.c: Likewise.
	* gcc.dg/vect/vect-multitypes-17.c: Likewise.
	* gcc.dg/vect/slp-widen-mult-s16.c: Likewise.

From-SVN: r145172