[gcc r12-1238] sh: Update unexpected empty split condition

[Kewen Lin]

https://gcc.gnu.org/g:081c9dfb67a0d2e7425ddb5420ada588026f92ca

commit r12-1238-g081c9dfb67a0d2e7425ddb5420ada588026f92ca
Author: Kewen Lin <linkw@linux.ibm.com>
Date:   Fri May 28 00:21:14 2021 -0500

    sh: Update unexpected empty split condition
    
    gcc/ChangeLog:
    
            * config/sh/sh.md (doloop_end_split): Fix empty split condition.

Diff:
---
 gcc/config/sh/sh.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gcc/config/sh/sh.md b/gcc/config/sh/sh.md
index e3af9ae21c1..93ee7c9a7de 100644
--- a/gcc/config/sh/sh.md
+++ b/gcc/config/sh/sh.md
@@ -6424,7 +6424,7 @@
    (clobber (reg:SI T_REG))]
   "TARGET_SH2"
   "#"
-  ""
+  "&& 1"
   [(parallel [(set (reg:SI T_REG)
 		   (eq:SI (match_dup 2) (const_int 1)))
 	      (set (match_dup 0) (plus:SI (match_dup 2) (const_int -1)))])