Avoid creating string insns unless string support is enabled

	* config/rx/rx.md (setmemsi): Added rx_allow_string_insns constraint
	(rx_setmem): Likewise.

gcc/ChangeLog

+2020-01-26  Darius Galis  <darius.galis@cyberthorstudios.com>
+
+	* config/rx/rx.md (setmemsi): Added rx_allow_string_insns constraint
+	(rx_setmem): Likewise.
+
 2020-01-26  Jakub Jelinek  <jakub@redhat.com>
 
 	PR target/93412

gcc/config/rx/rx.md

@@ -2511,7 +2511,7 @@
    (use (match_operand:SI  1 "nonmemory_operand")) ;; Length
    (match_operand          3 "immediate_operand")  ;; Align
    (unspec_volatile:BLK [(reg:SI 1) (reg:SI 2) (reg:SI 3)] UNSPEC_SETMEM)]
-  ""
+  "rx_allow_string_insns"
   {
     rtx addr = gen_rtx_REG (SImode, 1);
     rtx val  = gen_rtx_REG (QImode, 2);
@@ -2530,7 +2530,7 @@
 	(unspec_volatile:BLK [(reg:SI 1) (reg:SI 2) (reg:SI 3)] UNSPEC_SETMEM))
    (clobber (reg:SI 1))
    (clobber (reg:SI 3))]
-  ""
+  "rx_allow_string_insns"
   "sstr.b"
   [(set_attr "length" "2")
    (set_attr "timings" "1111")] ;; The timing is a guesstimate.