test/Sema/pragma-unused.c

   1 // RUN: %clang_cc1 -fsyntax-only -Wunused-parameter -Wused-but-marked-unused -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; // FIXME: We should emit a warning that 'w' is unused.
   9   #pragma unused w // expected-warning{{missing '(' after '#pragma unused' - ignoring}}
  10 }
  11
  12 void f2(void) {
  13   int x, y;
  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; // FIXME: We should emit a warning that 'w' is unused.
  24   #pragma unused((w)) // expected-warning{{expected '#pragma unused' argument to be a variable name}}
  25 }
  26
  27 int k;
  28 void f5(void) {
  29   #pragma unused(k) // expected-warning{{only local variables can be arguments to '#pragma unused'}}
  30 }
  31
  32 void f6(void) {
  33   int z; // no-warning
  34   {
  35     #pragma unused(z) // no-warning
  36   }
  37 }
  38
  39 void f7() {
  40   int y;
  41   #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'}}
  42 }
  43
  44 int f8(int x) { // expected-warning{{unused parameter 'x'}}
  45   return 0;
  46 }
  47
  48 int f9(int x) {
  49   return x;
  50 }
  51
  52 int f10(int x) {
  53   #pragma unused(x)
  54   return 0;
  55 }
  56
  57 int f11(int x) {
  58   #pragma unused(x)
  59   return x; // expected-warning{{'x' was marked unused but was used}}
  60 }
  61
  62 int f12(int x) {
  63   int y = x;
  64   #pragma unused(x) // expected-warning{{'x' was marked unused but was used}}
  65   return y;
  66 }