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-rw-r--r--test/Preprocessor/macro_paste_simple.c13
1 files changed, 11 insertions, 2 deletions
diff --git a/test/Preprocessor/macro_paste_simple.c b/test/Preprocessor/macro_paste_simple.c
index 563d7f44958d..0e62ba46dc96 100644
--- a/test/Preprocessor/macro_paste_simple.c
+++ b/test/Preprocessor/macro_paste_simple.c
@@ -1,5 +1,14 @@
-// RUN: %clang_cc1 %s -E | grep "barbaz123"
+// RUN: %clang_cc1 %s -E | FileCheck %s
#define FOO bar ## baz ## 123
-FOO
+// CHECK: A: barbaz123
+A: FOO
+
+// PR9981
+#define M1(A) A
+#define M2(X) X
+B: M1(M2(##))
+
+// CHECK: B: ##
+