gcc/testsuite/gcc.c-torture/execute/20000223-1.c

   1 /* Copyright (C) 2000 Free Software Foundation, Inc.
   2    Contributed by Nathan Sidwell 23 Feb 2000 <nathan@codesourcery.com> */
   3
   4 /* __alignof__ should never return a non-power of 2
   5    eg, sizeof(long double) might be 12, but that means it must be alignable
   6    on a 4 byte boundary. */
   7
   8 void abort (void);
   9
  10 void check (char const *type, int align)
  11 {
  12   if ((align & -align) != align)
  13     {
  14       abort ();
  15     }
  16 }
  17
  18 #define QUOTE_(s) #s
  19 #define QUOTE(s) QUOTE_(s)
  20
  21 #define check(t) check(QUOTE(t), __alignof__(t))
  22
  23 // This struct should have an alignment of the lcm of all the types. If one of
  24 // the base alignments is not a power of two, then A cannot be power of two
  25 // aligned.
  26 struct A
  27 {
  28   char c;
  29   signed short ss;
  30   unsigned short us;
  31   signed int si;
  32   unsigned int ui;
  33   signed long sl;
  34   unsigned long ul;
  35   signed long long sll;
  36   unsigned long long ull;
  37   float f;
  38   double d;
  39   long double ld;
  40   void *dp;
  41   void (*fp)();
  42 };
  43
  44 int main ()
  45 {
  46   check (void);
  47   check (char);
  48   check (signed short);
  49   check (unsigned short);
  50   check (signed int);
  51   check (unsigned int);
  52   check (signed long);
  53   check (unsigned long);
  54   check (signed long long);
  55   check (unsigned long long);
  56   check (float);
  57   check (double);
  58   check (long double);
  59   check (void *);
  60   check (void (*)());
  61   check (struct A);
  62   return 0;
  63 }