modernc.org/ccgo/v3@v3.16.14/lib/testdata/gcc-9.1.0/gcc/testsuite/gcc.c-torture/execute/extzvsi.c (about)

     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