test/Sema/pragma-unused.c

   1 // RUN: %clang_cc1 -fsyntax-only -Wunused-parameter -Wused-but-marked-unused -Wunused -verify %s
   2
   3 void f1(void) {
   4   int x, y, z;
   5   #pragma unused(x)
   6   #pragma unused(y, z)
   7
   8   int w; // expected-warning {{unused}}
   9   #pragma unused w // expected-warning{{missing '(' after '#pragma unused' - ignoring}}
  10 }
  11
  12 void f2(void) {
  13   int x, y; // expected-warning {{unused}} expected-warning {{unused}}
  14   #pragma unused(x,) // expected-warning{{expected '#pragma unused' argument to be a variable name}}
  15   #pragma unused() // expected-warning{{expected '#pragma unused' argument to be a variable name}}
  16 }
  17
  18 void f3(void) {
  19   #pragma unused(x) // expected-warning{{undeclared variable 'x' used as an argument for '#pragma unused'}}
  20 }
  21
  22 void f4(void) {
  23   int w; // expected-warning {{unused}}
  24   #pragma unused((w)) // expected-warning{{expected '#pragma unused' argument to be a variable name}}
  25 }
  26
  27 void f6(void) {
  28   int z; // no-warning
  29   {
  30     #pragma unused(z) // no-warning
  31   }
  32 }
  33
  34 void f7() {
  35   int y;
  36   #pragma unused(undeclared, undefined, y) // expected-warning{{undeclared variable 'undeclared' used as an argument for '#pragma unused'}} expected-warning{{undeclared variable 'undefined' used as an argument for '#pragma unused'}}
  37 }
  38
  39 int f8(int x) { // expected-warning{{unused parameter 'x'}}
  40   return 0;
  41 }
  42
  43 int f9(int x) {
  44   return x;
  45 }
  46
  47 int f10(int x) {
  48   #pragma unused(x)
  49   return 0;
  50 }
  51
  52 int f11(int x) {
  53   #pragma unused(x)
  54   return x; // expected-warning{{'x' was marked unused but was used}}
  55 }
  56
  57 int f12(int x) {
  58   int y = x;
  59   #pragma unused(x) // expected-warning{{'x' was marked unused but was used}}
  60   return y;
  61 }
  62
  63 // rdar://8793832
  64 static int glob_var = 0;
  65 #pragma unused(glob_var)