gcc/testsuite/gcc.dg/pr65345-1.c

   1 /* PR c/65345 */
   2 /* { dg-do compile } */
   3 /* { dg-options "" } */
   4
   5 _Atomic int i = 3;
   6
   7 int a1 = sizeof (i + 1);
   8 int a2 = sizeof (i = 0);
   9 int a3 = sizeof (i++);
  10 int a4 = sizeof (i--);
  11 int a5 = sizeof (-i);
  12
  13 int b1 = _Alignof (i + 1);
  14 int b2 = _Alignof (i = 0);
  15 int b3 = _Alignof (i++);
  16 int b4 = _Alignof (i--);
  17 int b5 = _Alignof (-i);
  18
  19 int c1 = i; /* { dg-error "initializer element is not constant" } */
  20 int c2 = (i ? 1 : 2); /* { dg-error "initializer element is not constant" } */
  21 int c3[i]; /* { dg-error "variably modified" } */
  22 int c4 = 0 || i; /* { dg-error "initializer element is not constant" } */
  23 int c5 = (i += 10); /* { dg-error "initializer element is not constant" } */
  24
  25 _Static_assert (_Generic (i, int: 1, default: 0) == 1, "1");
  26 _Static_assert (_Generic (i + 1, int: 1, default: 0) == 1, "2");
  27 _Static_assert (_Generic (i = 0, int: 1, default: 0) == 1, "3");
  28 _Static_assert (_Generic (i++, int: 1, default: 0) == 1, "4");
  29 _Static_assert (_Generic (i--, int: 1, default: 0) == 1, "5");
  30
  31 void fn1 (int a[i + 1]);
  32 void fn2 (int a[i = 0]);
  33 void fn3 (int a[i++]);
  34 void fn4 (int a[i--]);
  35 void fn5 (int a[-i]);