graphite-scop-detection.c (create_sese_edges): Compute dominance info before trying to fix loop structure.

	* graphite-scop-detection.c (create_sese_edges): Compute dominance
	info before trying to fix loop structure.
	* cfgloopmanip.c (fix_loop_structure): Require fast DOM queries.
	* tree-cfgcleanup.c (repair_loop_structures): Likewise.
	* cfgloop.c (verify_loop_structure): Verify loop fathers.

From-SVN: r190390