1 files changed, 20 insertions, 0 deletions
diff --git a/clang/test/Preprocessor/pragma_poison.c b/clang/test/Preprocessor/pragma_poison.c
new file mode 100644
index 00000000000..d91feb7ff2d
--- /dev/null
+++ b/clang/test/Preprocessor/pragma_poison.c
@@ -0,0 +1,20 @@
+// RUN: clang-cc %s -Eonly -verify
+
+#pragma GCC poison rindex
+rindex(some_string, 'h');   // expected-error {{attempt to use a poisoned identifier}}
+
+#define BAR _Pragma ("GCC poison XYZW")  XYZW /*NO ERROR*/
+  XYZW      // ok
+BAR
+  XYZW      // expected-error {{attempt to use a poisoned identifier}}
+
+// Pragma poison shouldn't warn from macro expansions defined before the token
+// is poisoned.
+
+#define strrchr rindex2
+#pragma GCC poison rindex2
+
+// Can poison multiple times.
+#pragma GCC poison rindex2
+
+strrchr(some_string, 'h');   // ok.