diff --git a/test/CodeGen/X86/2007-06-15-IntToMMX.ll b/test/CodeGen/X86/2007-06-15-IntToMMX.ll
new file mode 100644
index 00000000000..e608ac3ecb9
--- /dev/null
+++ b/test/CodeGen/X86/2007-06-15-IntToMMX.ll
@@ -0,0 +1,17 @@
+; RUN: llvm-as < %s | llc -march=x86-64 -mattr=+mmx | grep paddusw
+@R = external global <1 x i64>          ; <<1 x i64>*> [#uses=1]
+
+define void @foo(<1 x i64> %A, <1 x i64> %B) {
+entry:
+        %tmp4 = bitcast <1 x i64> %B to <4 x i16>               ; <<4 x i16>> [#uses=1]
+        %tmp6 = bitcast <1 x i64> %A to <4 x i16>               ; <<4 x i16>> [#uses=1]
+        %tmp7 = tail call <4 x i16> @llvm.x86.mmx.paddus.w( <4 x i16> %tmp6, <4 x i16> %tmp4 )   ; <<4 x i16>> [#uses=1]
+        %tmp8 = bitcast <4 x i16> %tmp7 to <1 x i64>            ; <<1 x i64>> [#uses=1]
+        store <1 x i64> %tmp8, <1 x i64>* @R
+        tail call void @llvm.x86.mmx.emms( )
+        ret void
+}
+
+declare <4 x i16> @llvm.x86.mmx.paddus.w(<4 x i16>, <4 x i16>)
+
+declare void @llvm.x86.mmx.emms()