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 void abort (void);
   4 void exit (int);
   5
   6 #if __INT_MAX__ < 2147483647
   7 int
   8 main (void)
   9 {
  10   exit (0);
  11 }
  12 #else
  13 /* Failed on powerpc due to bad extzvsi pattern.  */
  14
  15 struct ieee
  16 {
  17   unsigned int negative:1;
  18   unsigned int exponent:11;
  19   unsigned int mantissa0:20;
  20   unsigned int mantissa1:32;
  21 } x;
  22
  23 unsigned int
  24 foo (void)
  25 {
  26   unsigned int exponent;
  27
  28   exponent = x.exponent;
  29   if (exponent == 0)
  30     return 1;
  31   else if (exponent > 1)
  32     return 2;
  33   return 0;
  34 }
  35
  36 int
  37 main (void)
  38 {
  39   x.exponent = 1;
  40   if (foo () != 0)
  41     abort ();
  42   return 0;
  43 }
  44 #endif