gnu/dist/gcc4/gcc/testsuite/gcc.c-torture/execute/20011113-1.c

   1 typedef __SIZE_TYPE__ size_t;
   2 extern void *memcpy (void *__restrict, const void *__restrict, size_t);
   3 extern void abort (void);
   4 extern void exit (int);
   5
   6 typedef struct t
   7 {
   8   unsigned a : 16;
   9   unsigned b : 8;
  10   unsigned c : 8;
  11   long d[4];
  12 } *T;
  13
  14 typedef struct {
  15   long r[3];
  16 } U;
  17
  18 T bar (U, unsigned int);
  19
  20 T foo (T x)
  21 {
  22   U d, u;
  23
  24   memcpy (&u, &x->d[1], sizeof u);
  25   d = u;
  26   return bar (d, x->b);
  27 }
  28
  29 T baz (T x)
  30 {
  31   U d, u;
  32
  33   d.r[0] = 0x123456789;
  34   d.r[1] = 0xfedcba987;
  35   d.r[2] = 0xabcdef123;
  36   memcpy (&u, &x->d[1], sizeof u);
  37   d = u;
  38   return bar (d, x->b);
  39 }
  40
  41 T bar (U d, unsigned int m)
  42 {
  43   if (d.r[0] != 21 || d.r[1] != 22 || d.r[2] != 23)
  44     abort ();
  45   return 0;
  46 }
  47
  48 struct t t = { 26, 0, 0, { 0, 21, 22, 23 }};
  49
  50 int main (void)
  51 {
  52   baz (&t);
  53   foo (&t);
  54   exit (0);
  55 }