re PR middle-end/66633 (ICE on valid "verify_gimple failed" with OpenMP)

re PR middle-end/66633 (ICE on valid "verify_gimple failed" with OpenMP)

	PR middle-end/66633
	* tree-nested.c (get_static_chain): Or in a flag into
	info->static_chain_added.
	(get_frame_field, get_nonlocal_debug_decl): Likewise.
	(convert_nonlocal_omp_clauses, convert_local_omp_clauses): Revert
	2015-07-01 changes.
	(convert_tramp_reference_stmt): If a frame_decl or chain_decl
	is needed newly inside of GIMPLE_OMP_{PARALLEL,TASK,TARGET} body,
	add it to clauses.

	* gcc.dg/gomp/pr66633-1.c: New test.
	* gcc.dg/gomp/pr66633-2.c: New test.
	* gcc.dg/gomp/pr66633-3.c: New test.
	* gcc.dg/gomp/pr66633-4.c: New test.

From-SVN: r225638