Stage two of getting CFE top correct.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@39734 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Preprocessor/c99-6_10_3_3_p4.c b/test/Preprocessor/c99-6_10_3_3_p4.c
new file mode 100644
index 0000000..13d5661
--- /dev/null
+++ b/test/Preprocessor/c99-6_10_3_3_p4.c
@@ -0,0 +1,6 @@
+// RUN: clang -E %s | grep -F 'char p[] = "x ## y";'
+#define hash_hash # ## #
+#define mkstr(a) # a
+#define in_between(a) mkstr(a)
+#define join(c, d) in_between(c hash_hash d)
+char p[] = join(x, y);