1*f4a2713aSLionel Sambuc // RUN: %clang_cc1 -fsyntax-only -Wunused-variable -fblocks -verify %s 2*f4a2713aSLionel Sambuc 3*f4a2713aSLionel Sambuc struct s0 { 4*f4a2713aSLionel Sambuc unsigned int i; 5*f4a2713aSLionel Sambuc }; 6*f4a2713aSLionel Sambuc 7*f4a2713aSLionel Sambuc int proto(int a, int b); 8*f4a2713aSLionel Sambuc f0(void)9*f4a2713aSLionel Sambucvoid f0(void) { 10*f4a2713aSLionel Sambuc int a __attribute__((unused)), 11*f4a2713aSLionel Sambuc b; // expected-warning{{unused}} 12*f4a2713aSLionel Sambuc return; 13*f4a2713aSLionel Sambuc } 14*f4a2713aSLionel Sambuc f1(void)15*f4a2713aSLionel Sambucvoid f1(void) { 16*f4a2713aSLionel Sambuc int i; 17*f4a2713aSLionel Sambuc (void)sizeof(i); 18*f4a2713aSLionel Sambuc return; 19*f4a2713aSLionel Sambuc } 20*f4a2713aSLionel Sambuc 21*f4a2713aSLionel Sambuc // PR5933 f2()22*f4a2713aSLionel Sambucint f2() { 23*f4a2713aSLionel Sambuc int X = 4; // Shouldn't have a bogus 'unused variable X' warning. 24*f4a2713aSLionel Sambuc return Y + X; // expected-error {{use of undeclared identifier 'Y'}} 25*f4a2713aSLionel Sambuc } 26*f4a2713aSLionel Sambuc f3()27*f4a2713aSLionel Sambucint f3() { 28*f4a2713aSLionel Sambuc int X1 = 4; 29*f4a2713aSLionel Sambuc (void)(Y1 + X1); // expected-error {{use of undeclared identifier 'Y1'}} 30*f4a2713aSLionel Sambuc (void)(^() { int X = 4; }); // expected-warning{{unused}} 31*f4a2713aSLionel Sambuc (void)(^() { int X = 4; return Y + X; }); // expected-error {{use of undeclared identifier 'Y'}} 32*f4a2713aSLionel Sambuc } 33