re PR tree-optimization/31146 (forwprop does not look through casts)

re PR tree-optimization/31146 (forwprop does not look through casts)

2007-05-02  Richard Guenther  <rguenther@suse.de>

	PR tree-optimization/31146
	* tree-ssa-forwprop.c (forward_propagate_addr_expr_1): New
	argument, single_use_p.  If we have a single use that is
	a conversion to the definition rhs type, propagate that rhs.
	(forward_propagate_addr_expr): Pass single_use_p argument
	to forward_propagate_addr_expr_1.

	* g++.dg/tree-ssa/pr31146-2.C: New testcase.

From-SVN: r124349