added some tests for argument passing

llvm-svn: 28644
diff --git a/llvm/test/Regression/CodeGen/ARM/ret_arg3.ll b/llvm/test/Regression/CodeGen/ARM/ret_arg3.ll
new file mode 100644
index 0000000..c1fc092
--- /dev/null
+++ b/llvm/test/Regression/CodeGen/ARM/ret_arg3.ll
@@ -0,0 +1,4 @@
+; RUN: llvm-as < %s | llc -march=arm
+int %test(int %a1, int %a2, int %a3) {
+  ret int %a3
+}