gcc/testsuite/gcc.target/i386/pr37870.c

   1 /* PR middle-end/37870 */
   2 /* { dg-do run } */
   3 /* { dg-options "-O2 -mlong-double-80" } */
   4
   5 unsigned int
   6 foo (long double x)
   7 {
   8   struct { char a[8]; unsigned int b:7; } c;
   9   __builtin_memcpy (&c, &x, sizeof (c));
  10   return c.b;
  11 }
  12
  13 unsigned int
  14 bar (long double x)
  15 {
  16   union { struct { char a[8]; unsigned int b:7; } c; long double d; } u;
  17   u.d = x;
  18   return u.c.b;
  19 }
  20
  21 int
  22 main (void)
  23 {
  24   if (foo (1.245L) != bar (1.245L)
  25       || foo (245.67L) != bar (245.67L)
  26       || foo (0.00567L) != bar (0.00567L))
  27     __builtin_abort ();
  28   return 0;
  29 }