new testcase for paste avoidance
llvm-svn: 38765
diff --git a/clang/test/Preprocessor/output_paste_avoid.c b/clang/test/Preprocessor/output_paste_avoid.c
new file mode 100644
index 0000000..842063a
--- /dev/null
+++ b/clang/test/Preprocessor/output_paste_avoid.c
@@ -0,0 +1,12 @@
+// RUN: clang -E %s | grep '+ + - - + + = = =' &&
+// RUN: clang -E %s | not grep -F '...'
+
+// This should print as ".. ." to avoid turning into ...
+#define y(a) ..a
+y(.)
+
+#define PLUS +
+#define EMPTY
+#define f(x) =x=
++PLUS -EMPTY- PLUS+ f(=)
+