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-rw-r--r--clang/test/Preprocessor/traditional-cpp.c12
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diff --git a/clang/test/Preprocessor/traditional-cpp.c b/clang/test/Preprocessor/traditional-cpp.c
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+++ b/clang/test/Preprocessor/traditional-cpp.c
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+/* Clang supports a very limited subset of -traditional-cpp, basically we only
+ * intend to add support for things that people actually rely on when doing
+ * things like using /usr/bin/cpp to preprocess non-source files. */
+
+/*
+ RUN: %clang_cc1 -traditional-cpp %s -E -o %t
+ RUN: FileCheck < %t %s
+*/
+
+/* CHECK: foo // bar
+ */
+foo // bar