gcc/testsuite/c-c++-common/torture/pr42834.c

   1 /* { dg-do run } */
   2
   3 void __attribute__((noinline,noclone))
   4 foo(int *p, float *q) { __asm__ volatile ("" : : : "memory"); }
   5
   6 int main()
   7 {
   8   if (sizeof (int) == sizeof (float))
   9     {
  10       int i;
  11       float f;
  12       int *p;
  13       /* Prevent i and f from being rewritten into SSA form.  */
  14       foo (&i, &f);
  15       i = 0;
  16       f = 1.0;
  17       p = (int *)&f;
  18       __builtin_memcpy (&i, p, 4);
  19       if (*(float *)&i != 1.0)
  20         __builtin_abort ();
  21     }
  22   return 0;
  23 }