gcc/testsuite/gcc.dg/c11-align-6.c

   1 /* Test C11 _Alignof returning minimum alignment for a type.  PR
   2    52023.  */
   3 /* { dg-do run } */
   4 /* { dg-options "-std=c11" } */
   5
   6 extern void abort (void);
   7 extern void exit (int);
   8
   9 #define CHECK_ALIGN(TYPE)                       \
  10   do                                            \
  11     {                                           \
  12       struct { char c; TYPE v; } x;             \
  13       if (_Alignof (TYPE) > __alignof__ (x.v))  \
  14         abort ();                               \
  15     }                                           \
  16   while (0)
  17
  18 int
  19 main (void)
  20 {
  21   CHECK_ALIGN (_Bool);
  22   CHECK_ALIGN (char);
  23   CHECK_ALIGN (signed char);
  24   CHECK_ALIGN (unsigned char);
  25   CHECK_ALIGN (signed short);
  26   CHECK_ALIGN (unsigned short);
  27   CHECK_ALIGN (signed int);
  28   CHECK_ALIGN (unsigned int);
  29   CHECK_ALIGN (signed long);
  30   CHECK_ALIGN (unsigned long);
  31   CHECK_ALIGN (signed long long);
  32   CHECK_ALIGN (unsigned long long);
  33   CHECK_ALIGN (float);
  34   CHECK_ALIGN (double);
  35   CHECK_ALIGN (long double);
  36   CHECK_ALIGN (_Complex float);
  37   CHECK_ALIGN (_Complex double);
  38   CHECK_ALIGN (_Complex long double);
  39   exit (0);
  40 }