re PR tree-optimization/44393 (ICE: verify_ssa failed: no immediate_use list with -Os -ftree-loop-distribution)

2010-06-26  Richard Guenther  <rguenther@suse.de>

	PR tree-optimization/44393
	* tree-loop-distribution.c (generate_loops_for_partition): Fix
	stmt removal and VOP renaming.
	(generate_memset_zero): Remove redundant stmt updating.
	* tree-flow.h (mark_virtual_ops_in_bb): Remove.
	* tree-cfg.c (mark_virtual_ops_in_bb): Likewise.

	* gcc.dg/pr44393.c: New testcase.

From-SVN: r161434