gcc/testsuite/gcc.dg/pr16302.c

   1 /* PR 16302 */
   2 /* { dg-do compile } */
   3 /* { dg-options "-Wlogical-op" } */
   4 void bar (int);
   5 int
   6 foo (int argc, char *argv[])
   7 {
   8   if (argc != 1 || argc != 2) return 1; /* { dg-warning "'or' of collectively exhaustive tests is always true" } */
   9   if (argc < 0 && argc > 10) return 1; /* { dg-warning "'and' of mutually exclusive tests is always false" } */
  10   if (argc || !argc) return 1; /* { dg-warning "'or' of collectively exhaustive tests is always true" } */
  11   if (argc && !argc) return 1; /* { dg-warning "'and' of mutually exclusive tests is always false" } */
  12   bar (argc != 1 || argc != 2); /* { dg-warning "'or' of collectively exhaustive tests is always true" } */
  13   bar (argc < 0 && argc > 10); /* { dg-warning "'and' of mutually exclusive tests is always false" } */
  14   bar (argc || !argc); /* { dg-warning "'or' of collectively exhaustive tests is always true" } */
  15   bar (argc && !argc); /* { dg-warning "'and' of mutually exclusive tests is always false" } */
  16   return (argc != 1 || argc != 2) ? 1 : 0 ; /* { dg-warning "'or' of collectively exhaustive tests is always true" } */
  17   return (argc < 0 && argc > 10) ? 1 : 0; /* { dg-warning "'and' of mutually exclusive tests is always false" } */
  18   return (argc || !argc) ? 1 : 0; /* { dg-warning "'or' of collectively exhaustive tests is always true" } */
  19   return (argc && !argc) ? 1 : 0; /* { dg-warning "'and' of mutually exclusive tests is always false" } */
  20
  21   if (argc == 2 && argc == 1) return 1; /* { dg-warning "'and' of mutually exclusive tests is always false" } */
  22   if (argc < 0 && argc > 10) return 1; /* { dg-warning "'and' of mutually exclusive tests is always false" } */
  23   if (argc || !argc) return 1; /* { dg-warning "'or' of collectively exhaustive tests is always true" } */
  24   if (argc && !argc) return 1; /* { dg-warning "'and' of mutually exclusive tests is always false" } */
  25   bar (argc == 2 && argc == 1); /* { dg-warning "'and' of mutually exclusive tests is always false" } */
  26   bar (argc < 0 && argc > 10); /* { dg-warning "'and' of mutually exclusive tests is always false" } */
  27   bar (argc || !argc); /* { dg-warning "'or' of collectively exhaustive tests is always true" } */
  28   bar (argc && !argc); /* { dg-warning "'and' of mutually exclusive tests is always false" } */
  29   return (argc == 2 && argc == 1) ? 1 : 0 ; /* { dg-warning "'and' of mutually exclusive tests is always false" } */
  30   return (argc < 0 && argc > 10) ? 1 : 0; /* { dg-warning "'and' of mutually exclusive tests is always false" } */
  31   return (argc || !argc) ? 1 : 0; /* { dg-warning "'or' of collectively exhaustive tests is always true" } */
  32   return (argc && !argc) ? 1 : 0; /* { dg-warning "'and' of mutually exclusive tests is always false" } */
  33
  34   if (argc == 2 && argc == 1) return 1; /* { dg-warning "'and' of mutually exclusive tests is always false" } */
  35   if (argc < 0 && argc > 10) return 1; /* { dg-warning "'and' of mutually exclusive tests is always false" } */
  36   if (!argc || argc) return 1; /* { dg-warning "'or' of collectively exhaustive tests is always true" } */
  37   if (!argc && argc) return 1; /* { dg-warning "'and' of mutually exclusive tests is always false" } */
  38   bar (argc == 2 && argc == 1); /* { dg-warning "'and' of mutually exclusive tests is always false" } */
  39   bar (argc < 0 && argc > 10); /* { dg-warning "'and' of mutually exclusive tests is always false" } */
  40   bar (!argc || argc); /* { dg-warning "'or' of collectively exhaustive tests is always true" } */
  41   bar (!argc && argc); /* { dg-warning "'and' of mutually exclusive tests is always false" } */
  42   return (argc == 2 && argc == 1) ? 1 : 0 ; /* { dg-warning "'and' of mutually exclusive tests is always false" } */
  43   return (argc < 0 && argc > 10) ? 1 : 0; /* { dg-warning "'and' of mutually exclusive tests is always false" } */
  44   return (!argc || argc) ? 1 : 0; /* { dg-warning "'or' of collectively exhaustive tests is always true" } */
  45   return (!argc && argc) ? 1 : 0; /* { dg-warning "'and' of mutually exclusive tests is always false" } */
  46
  47   return 0;
  48 }
  49
  50 int
  51 foo2 (int argc)
  52 {
  53   if (5 != 1 || 5 != 2) return 1;
  54   if (5 < 0 && 5 > 10) return 1;
  55   if (1 || 0) return 1;
  56   if (0 && 1) return 1;
  57   if (2 || !2) return 1;
  58   if (2 && !2) return 1;
  59   if (!(!2) || !(2)) return 1;
  60   if (!(!2) && !(2)) return 1;
  61   bar (5 != 1 || 5 != 2);
  62   bar (5 < 0 && 5 > 10);
  63   bar (1 || 0);
  64   bar (0 && 1);
  65   bar (2 || !2);
  66   bar (2 && !2);
  67   return (5 != 1 || 5 != 2) ? 1 : 0 ;
  68   return (5 < 0 && 5 > 10) ? 1 : 0;
  69   return (1 || 0) ? 1 : 0 ;
  70   return (0 && 1) ? 1 : 0;
  71   return (2 || !2) ? 1 : 0;
  72   return (2 && !2) ? 1 : 0;
  73
  74   return 0;
  75 }
  76