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-rw-r--r--clang/test/Sema/pointer-subtract-compat.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/clang/test/Sema/pointer-subtract-compat.c b/clang/test/Sema/pointer-subtract-compat.c
index 4ed6abf8af7..9aebe9cdceb 100644
--- a/clang/test/Sema/pointer-subtract-compat.c
+++ b/clang/test/Sema/pointer-subtract-compat.c
@@ -4,3 +4,8 @@ typedef const char rchar;
int a(char* a, rchar* b) {
return a-b;
}
+
+// <rdar://problem/6520707>
+void f0(void (*fp)(void)) {
+ int x = fp - fp; // expected-warning{{arithmetic on pointer to function type 'void (*)(void)' is a GNU extension}}
+}
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