tree-ssa-sccvn.h (vn_reference_lookup): Add last_vuse_ptr argument.

tree-ssa-sccvn.h (vn_reference_lookup): Add last_vuse_ptr argument.

2019-07-04  Richard Biener  <rguenther@suse.de>

	* tree-ssa-sccvn.h (vn_reference_lookup): Add last_vuse_ptr
	argument.
	* tree-ssa-sccvn.c (last_vuse_ptr, vn_walk_kind): Move
	globals into...
	(struct vn_walk_cb_data): New callback data struct.
	(vn_reference_lookup_2): Adjust.
	(vn_reference_lookup_3): Likewise.
	(vn_reference_lookup_pieces): Likewise.
	(vn_reference_lookup): Likewise, get last_vuse_ptr argument.
	(visit_reference_op_load): Adjust.

From-SVN: r273042