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      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)
     66