simplify.c (gfc_simplify_cshift): Implement simplification of CSHIFT.
2015-11-21 Steven G. Kargl <kargl@gcc.gnu.org>
* simplify.c (gfc_simplify_cshift): Implement simplification of CSHIFT.
(gfc_simplify_spread): Remove a FIXME and add error condition.
* intrinsic.h: Prototype for gfc_simplify_cshift
* intrinsic.c (add_functions): Use gfc_simplify_cshift.