clang/test/Sema/warn-unused-variables.c

   1 // RUN: %clang_cc1 -fsyntax-only -Wunused-variable -fblocks -verify %s
   2
   3 struct s0 {
   4         unsigned int    i;
   5 };
   6
   7 int proto(int a, int b);
   8
   9 void f0(void) {
  10         int     a __attribute__((unused)),
  11                 b; // expected-warning{{unused}}
  12         return;
  13 }
  14
  15 void f1(void) {
  16         int     i;
  17         (void)sizeof(i);
  18         return;
  19 }
  20
  21 // PR5933
  22 int f2(void) {
  23   int X = 4;  // Shouldn't have a bogus 'unused variable X' warning.
  24   return Y + X; // expected-error {{use of undeclared identifier 'Y'}}
  25 }
  26
  27 int f3(void) {
  28   int X1 = 4;
  29   (void)(Y1 + X1); // expected-error {{use of undeclared identifier 'Y1'}}
  30   (void)(^() { int X = 4; }); // expected-warning{{unused}}
  31   (void)(^() { int X = 4; return Y + X; }); // expected-error {{use of undeclared identifier 'Y'}}
  32 }
  33
  34 void c1(int *);
  35 void f4(void) {
  36   int __attribute__((cleanup(c1))) X1 = 4;
  37 }