1  /* Test C11 alignment support.  Test valid code using stdalign.h.  */
       2  /* { dg-do run } */
       3  /* { dg-options "-std=c11 -pedantic-errors" } */
       4  
       5  #include <stdalign.h>
       6  #include <stddef.h>
       7  
       8  extern int strcmp (const char *, const char *);
       9  
      10  extern void exit (int);
      11  extern void abort (void);
      12  
      13  alignas (alignof (max_align_t)) char c;
      14  extern alignas (max_align_t) char c;
      15  extern char c;
      16  
      17  extern alignas (max_align_t) short s;
      18  alignas (max_align_t) short s;
      19  
      20  alignas (int) int i;
      21  extern int i;
      22  
      23  alignas (max_align_t) long l;
      24  
      25  alignas (max_align_t) long long ll;
      26  
      27  alignas (max_align_t) float f;
      28  
      29  alignas (max_align_t) double d;
      30  
      31  alignas (max_align_t) _Complex long double cld;
      32  
      33  alignas (0) alignas (int) alignas (char) char ca[10];
      34  
      35  alignas ((int) alignof (max_align_t) + 0) int x;
      36  
      37  enum e { E = alignof (max_align_t) };
      38  alignas (E) int y;
      39  
      40  void
      41  func (void)
      42  {
      43    alignas (max_align_t) long long auto_ll;
      44  }
      45  
      46  /* Valid, but useless.  */
      47  alignas (0) struct s; /* { dg-warning "useless" } */
      48  
      49  #ifndef alignas
      50  #error "alignas not defined"
      51  #endif
      52  
      53  #ifndef alignof
      54  #error "alignof not defined"
      55  #endif
      56  
      57  #ifndef __alignas_is_defined
      58  #error "__alignas_is_defined not defined"
      59  #endif
      60  
      61  #if __alignas_is_defined != 1
      62  #error "__alignas_is_defined not 1"
      63  #endif
      64  
      65  #ifndef __alignof_is_defined
      66  #error "__alignof_is_defined not defined"
      67  #endif
      68  
      69  #if __alignof_is_defined != 1
      70  #error "__alignof_is_defined not 1"
      71  #endif
      72  
      73  #define str(x) #x
      74  #define xstr(x) str(x)
      75  
      76  const char *s1 = xstr(alignas);
      77  const char *s2 = xstr(alignof);
      78  const char *s3 = xstr(__alignas_is_defined);
      79  const char *s4 = xstr(__alignof_is_defined);
      80  
      81  int
      82  main (void)
      83  {
      84    if (strcmp (s1, "_Alignas") != 0)
      85      abort ();
      86    if (strcmp (s2, "_Alignof") != 0)
      87      abort ();
      88    if (strcmp (s3, "1") != 0)
      89      abort ();
      90    if (strcmp (s4, "1") != 0)
      91      abort ();
      92  }