[gcc r10-6231] Avoid creating string insns unless string support is enabled

[Jeff Law]

https://gcc.gnu.org/g:0f6f39ed733e9462dbeef9dd56d52b21b8cd67c5

commit r10-6231-g0f6f39ed733e9462dbeef9dd56d52b21b8cd67c5
Author: Darius Galis <darius.galis@cyberthorstudios.com>
Date:   Sun Jan 26 09:52:56 2020 -0700

    Avoid creating string insns unless string support is enabled
    
    	* config/rx/rx.md (setmemsi): Added rx_allow_string_insns constraint
    	(rx_setmem): Likewise.

Diff:
---
 gcc/ChangeLog       | 5 +++++
 gcc/config/rx/rx.md | 4 ++--
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 420a124..4a30b93 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+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
diff --git a/gcc/config/rx/rx.md b/gcc/config/rx/rx.md
index e955571..0cf5025 100644
--- a/gcc/config/rx/rx.md
+++ b/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.