tree-optimization/106055 - issue with autopar

When autopar uses graphites canonicalize_loop_closed_ssa it fails to
check whether propagation is allowed and thus it ends up messing up
abnormal constraints.

2022-07-01  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/106055
	* graphite.cc (canonicalize_loop_closed_ssa): Check whether
	we can propagate.

	* gcc.dg/graphite/pr106055.c: New testcase.
2 files changed