gcc/testsuite/gcc.c-torture/execute/extzvsi.c

   1 /* The bit-field below would have a problem if __INT_MAX__ is too
   2    small.  */
   3 #if __INT_MAX__ < 2147483647
   4 int
   5 main (void)
   6 {
   7   exit (0);
   8 }
   9 #else
  10 /* Failed on powerpc due to bad extzvsi pattern.  */
  11
  12 struct ieee
  13 {
  14   unsigned int negative:1;
  15   unsigned int exponent:11;
  16   unsigned int mantissa0:20;
  17   unsigned int mantissa1:32;
  18 } x;
  19
  20 unsigned int
  21 foo (void)
  22 {
  23   unsigned int exponent;
  24
  25   exponent = x.exponent;
  26   if (exponent == 0)
  27     return 1;
  28   else if (exponent > 1)
  29     return 2;
  30   return 0;
  31 }
  32
  33 int
  34 main (void)
  35 {
  36   x.exponent = 1;
  37   if (foo () != 0)
  38     abort ();
  39   return 0;
  40 }
  41 #endif