PR middle-end/35549

	PR middle-end/35549
	* omp-low.c (maybe_lookup_decl): Constify first argument.
	(use_pointer_for_field): Change last argument from bool to
	omp_context *.  Disallow shared copy-in/out in nested
	parallel if decl is shared in outer parallel too.
	(build_outer_var_ref, scan_sharing_clauses,
	lower_rec_input_clauses, lower_copyprivate_clauses,
	lower_send_clauses, lower_send_shared_vars): Adjust callers.

	* testsuite/libgomp.c/pr35549.c: New test.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@133136 138bc75d-0d04-0410-961f-82ee72b054a4