gcc/testsuite/c-c++-common/pr69126.c

   1 /* { dg-options "-Wunused-variable" } */
   2
   3 /* Verify that ignoring -Wunused-variable works, for various placements
   4    of the variable and the _Pragma.  */
   5
   6 /* Test 1: the _Pragma is in a macro, but the affected code isn't.  */
   7
   8 #pragma GCC diagnostic push
   9
  10 #define MACRO_1 \
  11     _Pragma("GCC diagnostic ignored \"-Wunused-variable\"")
  12
  13 int test_1()
  14 {
  15     _Pragma("GCC diagnostic ignored \"-Wunused-variable\"")
  16     int x;
  17     return 0;
  18 }
  19 #pragma GCC diagnostic pop
  20
  21
  22 /* Test 2: neither the _Pragma nor the affected code are in a macro.  */
  23
  24 #pragma GCC diagnostic push
  25 int test_2()
  26 {
  27     _Pragma("GCC diagnostic ignored \"-Wunused-variable\"")
  28     int x;
  29     return 0;
  30 }
  31 #pragma GCC diagnostic pop
  32
  33
  34 /* Test 3: the _Pragma isn't in a macro, but the affected code is.  */
  35
  36 #define MACRO_3 \
  37     int x;
  38
  39 #pragma GCC diagnostic push
  40 int test_3()
  41 {
  42     _Pragma("GCC diagnostic ignored \"-Wunused-variable\"")
  43     MACRO_3
  44     return 0;
  45 }
  46 #pragma GCC diagnostic pop
  47
  48
  49 /* Test 4: the _Pragma and the affected code are in different macros.  */
  50
  51 #pragma GCC diagnostic push
  52 #define MACRO_4A \
  53     _Pragma("GCC diagnostic ignored \"-Wunused-variable\"")
  54
  55 #define MACRO_4B \
  56     int x;
  57
  58 int test_4()
  59 {
  60     MACRO_4A;
  61     MACRO_4B
  62     return 0;
  63 }
  64 #pragma GCC diagnostic pop
  65
  66
  67 /* Test 5: both the _Pragma and the affected code are in the same macro.  */
  68
  69 #pragma GCC diagnostic push
  70 #define MACRO_5 \
  71     _Pragma("GCC diagnostic ignored \"-Wunused-variable\"") \
  72     int x;
  73
  74 int test_5()
  75 {
  76     MACRO_5;
  77     return 0;
  78 }
  79 #pragma GCC diagnostic pop