Check in LLVM r95781.
diff --git a/test/Preprocessor/stringize_misc.c b/test/Preprocessor/stringize_misc.c
new file mode 100644
index 0000000..6c2c78d
--- /dev/null
+++ b/test/Preprocessor/stringize_misc.c
@@ -0,0 +1,30 @@
+// RUN: %clang_cc1 -E %s | FileCheck -strict-whitespace %s
+
+#define M(x, y) #x #y
+
+M( f(1, 2), g((x=y++, y)))
+// CHECK: "f(1, 2)" "g((x=y++, y))"
+
+M( {a=1 , b=2;} ) /* A semicolon is not a comma */
+// CHECK: "{a=1" "b=2;}"
+
+M( <, [ ) /* Passes the arguments < and [ */
+// CHECK: "<" "["
+
+M( (,), (...) ) /* Passes the arguments (,) and (...) */
+// CHECK: "(,)" "(...)"
+
+#define START_END(start, end) start c=3; end
+
+START_END( {a=1 , b=2;} ) /* braces are not parentheses */
+// CHECK: {a=1 c=3; b=2;}
+
+/*
+ * To pass a comma token as an argument it is
+ * necessary to write:
+ */
+#define COMMA ,
+
+M(a COMMA b, (a, b))
+// CHECK: "a COMMA b" "(a, b)"
+