--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/CodeGen/SystemZ/int-sub-08.ll	Thu Dec 12 13:56:28 2013 +0900
@@ -0,0 +1,39 @@
+; Test the three-operand forms of subtraction.
+;
+; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z196 | FileCheck %s
+
+; Check SRK.
+define i32 @f1(i32 %a, i32 %b, i32 %c) {
+; CHECK-LABEL: f1:
+; CHECK: srk %r2, %r3, %r4
+; CHECK: br %r14
+  %sub = sub i32 %b, %c
+  ret i32 %sub
+}
+
+; Check that we can still use SR in obvious cases.
+define i32 @f2(i32 %a, i32 %b) {
+; CHECK-LABEL: f2:
+; CHECK: sr %r2, %r3
+; CHECK: br %r14
+  %sub = sub i32 %a, %b
+  ret i32 %sub
+}
+
+; Check SGRK.
+define i64 @f3(i64 %a, i64 %b, i64 %c) {
+; CHECK-LABEL: f3:
+; CHECK: sgrk %r2, %r3, %r4
+; CHECK: br %r14
+  %sub = sub i64 %b, %c
+  ret i64 %sub
+}
+
+; Check that we can still use SGR in obvious cases.
+define i64 @f4(i64 %a, i64 %b) {
+; CHECK-LABEL: f4:
+; CHECK: sgr %r2, %r3
+; CHECK: br %r14
+  %sub = sub i64 %a, %b
+  ret i64 %sub
+}