cfgloop.c (alloc_loop): Initialize loop->single_iv.

2009-10-22  Sebastian Pop  <sebastian.pop@amd.com>

	* cfgloop.c (alloc_loop): Initialize loop->single_iv.
	* cfgloop.h (struct loop): New field single_iv.

	* graphite-clast-to-gimple.c (pbb_to_depth_to_oldiv): Do not use
	loop->aux anymore: use loop->single_iv.
	(graphite_loop_normal_form): Moved...
	(build_graphite_loop_normal_form): Removed.
	(gloog): Do not call build_graphite_loop_normal_form.
	(free_aux_in_new_loops): Moved...
	(mark_loops_parallel): Restructure.
	* graphite-clast-to-gimple.h (free_aux_in_new_loops): Do not declare.
	* graphite-sese-to-poly.c (graphite_loop_normal_form): ...here.
	(scop_canonicalize_loops): New.
	(build_poly_scop): Call scop_canonicalize_loops.
	* graphite.c (free_aux_in_new_loops): ...here.

From-SVN: r154624