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-rw-r--r--clang/test/Preprocessor/macro_paste_simple.c14
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diff --git a/clang/test/Preprocessor/macro_paste_simple.c b/clang/test/Preprocessor/macro_paste_simple.c
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+++ b/clang/test/Preprocessor/macro_paste_simple.c
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+// RUN: %clang_cc1 %s -E | FileCheck %s
+
+#define FOO bar ## baz ## 123
+
+// CHECK: A: barbaz123
+A: FOO
+
+// PR9981
+#define M1(A) A
+#define M2(X) X
+B: M1(M2(##))
+
+// CHECK: B: ##
+