re PR tree-optimization/61221 (ICE on valid code at -O1 and above on x86_64-linux...

re PR tree-optimization/61221 (ICE on valid code at -O1 and above on x86_64-linux-gnu)

2014-05-20  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/61221
	* tree-ssa-pre.c (el_to_update): Remove.
	(eliminate_dom_walker::before_dom_children): Handle released
	VDEFs by value-numbering them to the associated VUSE.  Update
	stmt immediately for substituted call address.
	(eliminate): Remove delayed stmt updating code.
	* tree-ssa-sccvn.c (vuse_ssa_val): New function valueizing
	possibly late re-numbered vuses.
	(vn_reference_lookup_2): Adjust.
	(vn_reference_lookup_pieces): Likewise.
	(vn_reference_lookup): Likewise.

From-SVN: r210633