1 files changed, 43 insertions, 0 deletions
diff --git a/clang/test/Sema/attr-unused.c b/clang/test/Sema/attr-unused.c
new file mode 100644
index 0000000..07c65cb
--- /dev/null
+++ b/clang/test/Sema/attr-unused.c
@@ -0,0 +1,43 @@
+// RUN: %clang_cc1 -verify -Wunused -Wused-but-marked-unused -Wunused-parameter -Wunused -fsyntax-only %s
+
+static void (*fp0)(void) __attribute__((unused));
+
+static void __attribute__((unused)) f0(void);
+
+// On K&R
+int f1() __attribute__((unused));
+
+int g0 __attribute__((unused));
+
+int f2() __attribute__((unused(1, 2))); // expected-error {{attribute takes no arguments}}
+
+struct Test0_unused {} __attribute__((unused));
+struct Test0_not_unused {};
+typedef int Int_unused __attribute__((unused));
+typedef int Int_not_unused;
+
+void test0() {
+  int x; // expected-warning {{unused variable}}
+
+  Int_not_unused i0; // expected-warning {{unused variable}}
+  Int_unused i1; // expected-warning {{'Int_unused' was marked unused but was used}}
+
+  struct Test0_not_unused s0; // expected-warning {{unused variable}}
+  struct Test0_unused s1; // expected-warning {{'Test0_unused' was marked unused but was used}}
+}
+
+int f3(int x) { // expected-warning{{unused parameter 'x'}}
+  return 0;
+}
+
+int f4(int x) {
+  return x;
+}
+
+int f5(int x __attribute__((__unused__))) {
+  return 0;
+}
+
+int f6(int x __attribute__((__unused__))) {
+  return x; // expected-warning{{'x' was marked unused but was used}}
+}