PR middle-end/33880
	* tree-nested.c (walk_omp_for): New function.
	(convert_nonlocal_reference, convert_local_reference): Call
	walk_omp_for on OMP_FOR.
	(convert_call_expr): Call walk_body on OMP_FOR's
	OMP_FOR_PRE_INIT_BODY.

	* testsuite/libgomp.c/pr33880.c: New test.
	* testsuite/libgomp.fortran/pr33880.f90: New test.

From-SVN: r131825