* arith.c (gfc_arith_uplus): Rename to ...
(gfc_arith_identity): ... this.
(gfc_parentheses): New function.
(gfc_uplus): Adapt to renamed function.
* arith.h (gfc_parentheses): Add prototype.
* expr.c (gfc_copy_expr): Deal with INTRINSIC_PARENTHESES.
(simplifiy_intrinsic_op): Treat INTRINSIC_UPLUS separately from
INTRINSIC_PARENTHESES.

From-SVN: r123750