2010-10-13  Richard Guenther  <rguenther@suse.de>

	PR tree-optimization/45970
	* tree-ssa-alias.h (stmt_kills_ref_p): Declare.
	* tree-ssa-alias.c (stmt_kills_ref_p_1): New function.
	(stmt_kills_ref_p): Likewise.
	* tree-ssa-dse.c (dse_optimize_stmt): Use it.

	* gcc.dg/tree-ssa/ssa-dse-13.c: New testcase.

From-SVN: r165422