diff --git a/clang/test/Preprocessor/c99-6_10_3_3_p4.c b/clang/test/Preprocessor/c99-6_10_3_3_p4.c
new file mode 100644
index 000000000000..13d5661e3608
--- /dev/null
+++ b/clang/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);
diff --git a/clang/test/Preprocessor/c99-6_10_3_4_p9.c b/clang/test/Preprocessor/c99-6_10_3_4_p9.c
new file mode 100644
index 000000000000..08b4637e0e30
--- /dev/null
+++ b/clang/test/Preprocessor/c99-6_10_3_4_p9.c
@@ -0,0 +1,16 @@
+// Example from C99 6.10.3.4p9
+
+// RUN: clang -E %s | grep -F 'fprintf(stderr, "Flag");' &&
+// RUN: clang -E %s | grep -F 'fprintf(stderr, "X = %d\n", x);' &&
+// RUN: clang -E %s | grep -F 'puts("The first, second, and third items.");' &&
+// RUN: clang -E %s | grep -F '((x>y)?puts("x>y"): printf("x is %d but y is %d", x, y));'
+
+#define debug(...) fprintf(stderr, __VA_ARGS__) 
+#define showlist(...) puts(#__VA_ARGS__) 
+#define report(test, ...) ((test)?puts(#test):\
+                           printf(__VA_ARGS__)) 
+debug("Flag"); 
+debug("X = %d\n", x); 
+showlist(The first, second, and third items.); 
+report(x>y, "x is %d but y is %d", x, y); 
+