gcc/testsuite/gcc.dg/c11-align-3.c

   1 /* Test C11 alignment support.  Test invalid code.  */
   2 /* { dg-do compile } */
   3 /* { dg-options "-std=c11 -pedantic-errors" } */
   4
   5 int a = _Alignof (void (void)); /* { dg-error "function" } */
   6 struct s;
   7 int b = _Alignof (struct s); /* { dg-error "incomplete" } */
   8 int c = _Alignof (void); /* { dg-error "void" } */
   9 int d = _Alignof (a); /* { dg-error "expression" } */
  10
  11 _Alignas (void (void)) char e; /* { dg-error "function" } */
  12 _Alignas (struct s) char f; /* { dg-error "incomplete" } */
  13 _Alignas (void) char g; /* { dg-error "void" } */
  14
  15 _Alignas (-__INT_MAX__-1) char h; /* { dg-error "too large|power of 2" } */
  16 _Alignas (-__INT_MAX__) char h2; /* { dg-error "too large|power of 2" } */
  17 _Alignas ((-__INT_MAX__-1)/2) char h3; /* { dg-error "too large|power of 2" } */
  18 _Alignas ((-__INT_MAX__-1)/4) char h4; /* { dg-error "too large|power of 2" } */
  19 _Alignas ((-__INT_MAX__-1)/8) char h5; /* { dg-error "too large|power of 2" } */
  20 _Alignas (-__LONG_LONG_MAX__-1) char i; /* { dg-error "too large|power of 2" } */
  21 _Alignas (-(__LONG_LONG_MAX__-1)/2) char i2; /* { dg-error "too large|power of 2" } */
  22 _Alignas (-(__LONG_LONG_MAX__-1)/4) char i3; /* { dg-error "too large|power of 2" } */
  23 _Alignas (-(__LONG_LONG_MAX__-1)/8) char i4; /* { dg-error "too large|power of 2" } */
  24 _Alignas (-(__LONG_LONG_MAX__-1)/16) char i5; /* { dg-error "too large|power of 2" } */
  25 _Alignas (-1) char j; /* { dg-error "power of 2" } */
  26 _Alignas (-2) char j; /* { dg-error "positive power of 2" } */
  27 _Alignas (3) char k; /* { dg-error "power of 2" } */
  28
  29 _Alignas ((void *) 1) char k; /* { dg-error "integer constant" } */
  30 int x;
  31 _Alignas (x) char l; /* { dg-error "integer constant" } */
  32
  33 _Alignas (0) struct s; /* { dg-error "does not redeclare tag" } */
  34
  35 _Alignas (0) typedef int T; /* { dg-error "alignment specified for typedef" } */
  36 void func (_Alignas (0) int); /* { dg-error "alignment specified for unnamed parameter" } */
  37 void f2 (_Alignas (0) int parm2) {} /* { dg-error "alignment specified for parameter" } */
  38 void
  39 f3 (void)
  40 {
  41   register _Alignas (0) int reg; /* { dg-error "register" } */
  42 }
  43 _Alignas (0) void f4 (void); /* { dg-error "alignment specified for function" } */