re PR tree-optimization/79483 ([graphite] ICE: verify_ssa failed (error: definition in block 31 does not dominate use in block 28))

2017-06-09  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/79483
	* graphite-scop-detection.c (order): New global.
	(get_order): Compute bb to order mapping that satisfies code
	generation constraints.
	(cmp_pbbs): New helper.
	(build_scops): Start domwalk at entry block, sort generated
	pbbs.

	* gcc.dg/graphite/pr79483.c: New testcase.

From-SVN: r249052