re PR tree-optimization/69823 (internal compiler error: in create_pw_aff_from_tree, at graphite-sese-to-poly.c:445)

2017-02-09  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/69823
	* graphite-scop-detection.c (scop_detection::harmful_loop_in_region):
	Properly enumerate all BBs in the region.  Use auto_vec/auto_bitmap.

	* gcc.dg/graphite/pr69823.c: New testcase.

From-SVN: r245295