1*67e74705SXin Li // RUN: %clang_cc1 -verify -Wunused -Wused-but-marked-unused -Wunused-parameter -Wunused -fsyntax-only %s 2*67e74705SXin Li 3*67e74705SXin Li static void (*fp0)(void) __attribute__((unused)); 4*67e74705SXin Li 5*67e74705SXin Li static void __attribute__((unused)) f0(void); 6*67e74705SXin Li 7*67e74705SXin Li // On K&R 8*67e74705SXin Li int f1() __attribute__((unused)); 9*67e74705SXin Li 10*67e74705SXin Li int g0 __attribute__((unused)); 11*67e74705SXin Li 12*67e74705SXin Li int f2() __attribute__((unused(1, 2))); // expected-error {{'unused' attribute takes no arguments}} 13*67e74705SXin Li 14*67e74705SXin Li struct Test0_unused {} __attribute__((unused)); 15*67e74705SXin Li struct Test0_not_unused {}; 16*67e74705SXin Li typedef int Int_unused __attribute__((unused)); 17*67e74705SXin Li typedef int Int_not_unused; 18*67e74705SXin Li test0()19*67e74705SXin Livoid test0() { 20*67e74705SXin Li int x; // expected-warning {{unused variable}} 21*67e74705SXin Li 22*67e74705SXin Li Int_not_unused i0; // expected-warning {{unused variable}} 23*67e74705SXin Li Int_unused i1; // expected-warning {{'Int_unused' was marked unused but was used}} 24*67e74705SXin Li 25*67e74705SXin Li struct Test0_not_unused s0; // expected-warning {{unused variable}} 26*67e74705SXin Li struct Test0_unused s1; // expected-warning {{'Test0_unused' was marked unused but was used}} 27*67e74705SXin Li } 28*67e74705SXin Li f3(int x)29*67e74705SXin Liint f3(int x) { // expected-warning{{unused parameter 'x'}} 30*67e74705SXin Li return 0; 31*67e74705SXin Li } 32*67e74705SXin Li f4(int x)33*67e74705SXin Liint f4(int x) { 34*67e74705SXin Li return x; 35*67e74705SXin Li } 36*67e74705SXin Li f5(int x)37*67e74705SXin Liint f5(int x __attribute__((__unused__))) { 38*67e74705SXin Li return 0; 39*67e74705SXin Li } 40*67e74705SXin Li f6(int x)41*67e74705SXin Liint f6(int x __attribute__((__unused__))) { 42*67e74705SXin Li return x; // expected-warning{{'x' was marked unused but was used}} 43*67e74705SXin Li } 44