re PR rtl-optimization/44479 (false dependencies are computed after vectorization)

re PR rtl-optimization/44479 (false dependencies are computed after vectorization)

2010-07-04  Richard Guenther  <rguenther@suse.de>

	PR tree-optimization/44479
	* tree-ssa-loop-ivopts.c (rewrite_use_nonlinear_expr): Avoid
	extra SSA name copy statements which preserves points-to
	information.
	* tree-vect-data-refs.c (vect_create_addr_base_for_vector_ref):
	Copy points-to information for all pointers.  Properly handle
	MEM_REFs.
	(vect_create_data_ref_ptr): Likewise.  Avoid extra SSA name
	copy statements.
	* Makefile.in (tree-ssa-loop-ivopts.o): Add tree-ssa-propagate.h
	dependency.

From-SVN: r161802