* gcc.dg/tree-ssa/pr21829.c: Simplify matching since
	we now optimize better.
	* gcc.dg/Wunreachable-8.c: Bogus warnings now come
	out at different places.
	* gcc.dg/vect/vect-92.c: Increase loop iteration count to prevent
	unroling.
	* gcc.dg/vect/vect-76.c: Likewise.
	* gcc.dg/vect/vect-70.c: Likewise.
	* gcc.dg/vect/vect-66.c: Likewise.
	* gcc.dg/vect/no-section-anchors-vect-66.c: Likewise.
	* gcc.dg/vect/slp-3.c: One of loops gets now fully unrolled.
	* tree-ssa-loop-ivcanon.c: Include target.h
	(struct loop_size): new structure.
	(constant_after_peeling): New predicate.
	(tree_estimate_loop_size): New function.
	(estimated_unrolled_size): Rewrite for new estimates.
	(try_unroll_loop_completely): Use new estimates.
	* Makefile.in (tree-ssa-loop-ivcanon.o): Add dependenc on target.h

From-SVN: r147395