pragma-unused.c revision cd1af3d68b00aa729e382fe2cde186f237630804 
1// RUN: %clang_cc1 -fsyntax-only -Wunused-parameter -Wused-but-marked-unused -verify %s
2
3void 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
12void 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
18void f3(void) {
19  #pragma unused(x) // expected-warning{{undeclared variable 'x' used as an argument for '#pragma unused'}}
20}
21
22void 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
27int k;
28void f5(void) {
29  #pragma unused(k) // expected-warning{{only local variables can be arguments to '#pragma unused'}}
30}
31
32void f6(void) {
33  int z; // no-warning
34  {
35    #pragma unused(z) // no-warning
36  }
37}
38
39void 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
44int f8(int x) { // expected-warning{{unused parameter 'x'}}
45  return 0;
46}
47
48int f9(int x) {
49  return x;
50}
51
52int f10(int x) {
53  #pragma unused(x)
54  return 0;
55}
56
57int f11(int x) {
58  #pragma unused(x)
59  return x; // expected-warning{{'x' was marked unused but was used}}
60}
61
62int f12(int x) {
63  int y = x;
64  #pragma unused(x) // expected-warning{{'x' was marked unused but was used}}
65  return y;
66}
67