diff --git a/test/Feature/paramattrs.ll b/test/Feature/paramattrs.ll
new file mode 100644
index 00000000000..df0232c6811
--- /dev/null
+++ b/test/Feature/paramattrs.ll
@@ -0,0 +1,18 @@
+; RUN: llvm-as < %s | llvm-dis > %t1.ll
+; RUN: llvm-as %t1.ll -o - | llvm-dis > %t2.ll
+; RUN: diff %t1.ll %t2.ll
+
+%FunTy = type i32(i8 @zext)
+
+declare i16 @(sext) "test"(i16 @sext %arg)      ; Differ only by vararg
+declare i16 "test2" (i16 %a1, i16 %a2)
+
+implementation
+
+define i32 %main(i32 %argc, i8 **%argv) {
+    %val = trunc i32 %argc to i16
+    %res = call i16 @sext (i16 @sext) *%test(i16 %val)
+    %two = add i16 %res, %res
+    %retVal = sext i16 %two to i32
+    ret i32 %retVal
+}