diff --git a/test/CodeGen/ARM/ctz.ll b/test/CodeGen/ARM/ctz.ll
new file mode 100644
index 00000000000..1d2ced37b03
--- /dev/null
+++ b/test/CodeGen/ARM/ctz.ll
@@ -0,0 +1,11 @@
+; RUN: llc < %s -march=arm -mattr=+v6t2 | FileCheck %s
+
+declare i32 @llvm.cttz.i32(i32)
+
+define i32 @f1(i32 %a) {
+; CHECK: f1:
+; CHECK: rbit
+; CHECK: clz
+  %tmp = call i32 @llvm.cttz.i32( i32 %a )
+  ret i32 %tmp
+}