re PR fortran/83017 (DO CONCURRENT not parallelizing)

re PR fortran/83017 (DO CONCURRENT not parallelizing)

2017-11-17  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/83017
	* tree-parloops.c (MIN_PER_THREAD): Use --param parloops-min-per-thread.
	(gen_parallel_loop): Properly count iterations.
	(parallelize_loops): Handle loop->can_be_parallel independent
	of flag_loop_parallelize_all.  Make static profitability test match
	the runtime one.
	* params.def (PARAM_PARLOOPS_MIN_PER_THREAD): New.
	* invoke.texi (parloops-min-per-thread): Document.

	* gcc.dg/autopar/pr49960.c: Adjust.

From-SVN: r254867