ARM test cases contributed by Apple.

llvm-svn: 33354
diff --git a/llvm/test/CodeGen/ARM/ret0.ll b/llvm/test/CodeGen/ARM/ret0.ll
new file mode 100644
index 0000000..176b2e0
--- /dev/null
+++ b/llvm/test/CodeGen/ARM/ret0.ll
@@ -0,0 +1,4 @@
+; RUN: llvm-upgrade < %s | llvm-as | llc -march=arm
+int %test() {
+  ret int 0
+}