Retain attributes for K&R style parameter declarations.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@96941 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Parser/knr_parameter_attributes.c b/test/Parser/knr_parameter_attributes.c
new file mode 100644
index 0000000..fb975cb
--- /dev/null
+++ b/test/Parser/knr_parameter_attributes.c
@@ -0,0 +1,11 @@
+// RUN: %clang_cc1 -fsyntax-only -W -Wall -Werror -verify %s
+
+int f(int i __attribute__((__unused__)))
+{
+    return 0;
+}
+int g(i)
+    int i __attribute__((__unused__));
+{
+    return 0;
+}