Update intrinsics-overflow.ll

Author: AZero13

llvm/test/CodeGen/ARM/intrinsics-overflow.ll

@@ -123,7 +123,7 @@ define i32 @ssub_overflow(i32 %a, i32 %b) #0 {
 ;
 ; THUMBV6-LABEL: ssub_overflow:
 ; THUMBV6:       @ %bb.0:
-; THUMBV6-NEXT:    subs r0, r0, r1
+; THUMBV6-NEXT:    cmp r0, r1
 ; THUMBV6-NEXT:    bvc .LBB3_2
 ; THUMBV6-NEXT:  @ %bb.1:
 ; THUMBV6-NEXT:    movs r0, #1