diff --git a/test/CodeGen/PowerPC/2007-03-24-cntlzd.ll b/test/CodeGen/PowerPC/2007-03-24-cntlzd.ll
new file mode 100644
index 00000000000..a9808cee55d
--- /dev/null
+++ b/test/CodeGen/PowerPC/2007-03-24-cntlzd.ll
@@ -0,0 +1,13 @@
+; RUN: llvm-as < %s | llc -march=ppc64 -mcpu=g5 | grep cntlzd
+
+define i32 @_ZNK4llvm5APInt17countLeadingZerosEv(i64 *%t) {
+        %tmp19 = load i64* %t
+        %tmp23 = tail call i64 @llvm.ctlz.i64( i64 %tmp19 )             ; <i64> [#uses=1]
+        %tmp2324 = trunc i64 %tmp23 to i32              ; <i32> [#uses=1]
+        %tmp89 = add i32 %tmp2324, -64          ; <i32> [#uses=1]
+        %tmp90 = add i32 %tmp89, 0              ; <i32> [#uses=1]
+        ret i32 %tmp90
+}
+
+declare i64 @llvm.ctlz.i64(i64)
+