--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/CodeGen/SystemZ/asm-11.ll	Thu Dec 12 13:56:28 2013 +0900
@@ -0,0 +1,41 @@
+; Test the "I" constraint (8-bit unsigned constants).
+;
+; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
+
+; Test 1 below the first valid value.
+define i32 @f1() {
+; CHECK-LABEL: f1:
+; CHECK: lhi [[REG:%r[0-5]]], -1
+; CHECK: blah %r2 [[REG]]
+; CHECK: br %r14
+  %val = call i32 asm "blah $0 $1", "=&r,rI" (i32 -1)
+  ret i32 %val
+}
+
+; Test the first valid value.
+define i32 @f2() {
+; CHECK-LABEL: f2:
+; CHECK: blah %r2 0
+; CHECK: br %r14
+  %val = call i32 asm "blah $0 $1", "=&r,rI" (i32 0)
+  ret i32 %val
+}
+
+; Test the last valid value.
+define i32 @f3() {
+; CHECK-LABEL: f3:
+; CHECK: blah %r2 255
+; CHECK: br %r14
+  %val = call i32 asm "blah $0 $1", "=&r,rI" (i32 255)
+  ret i32 %val
+}
+
+; Test 1 above the last valid value.
+define i32 @f4() {
+; CHECK-LABEL: f4:
+; CHECK: lhi [[REG:%r[0-5]]], 256
+; CHECK: blah %r2 [[REG]]
+; CHECK: br %r14
+  %val = call i32 asm "blah $0 $1", "=&r,rI" (i32 256)
+  ret i32 %val
+}