Call scev_reset_htab when Graphite out-of-SSA has changed something.

Call scev_reset_htab when Graphite out-of-SSA has changed something.

2010-07-27  Sebastian Pop  <sebastian.pop@amd.com>

	* graphite-sese-to-poly.c (rewrite_cross_bb_scalar_deps): Returns
	a bool.
	(rewrite_commutative_reductions_out_of_ssa_close_phi): Same.
	(rewrite_commutative_reductions_out_of_ssa_loop): Same.
	(rewrite_cross_bb_scalar_deps_out_of_ssa): Call scev_reset_htab
	when something has been changed.
	(rewrite_commutative_reductions_out_of_ssa): Same.

	* gcc.dg/graphite/id-26.c: New.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@163160 138bc75d-0d04-0410-961f-82ee72b054a4