re PR middle-end/91216 (OpenMP ICE starting with r265930)

re PR middle-end/91216 (OpenMP ICE starting with r265930)

	PR middle-end/91216
	* omp-low.c (global_nonaddressable_vars): New variable.
	(use_pointer_for_field): For global decls, if they are non-addressable,
	remember it in the global_nonaddressable_vars bitmap, if they are
	addressable and in the global_nonaddressable_vars bitmap, ignore their
	TREE_ADDRESSABLE bit.
	(omp_copy_decl_2): Clear TREE_ADDRESSABLE also on private copies of
	vars in global_nonaddressable_vars bitmap.
	(execute_lower_omp): Free global_nonaddressable_vars bitmap.

	* gcc.dg/gomp/pr91216.c: New test.

From-SVN: r273898