modernc.org/ccgo/v3@v3.16.14/lib/testdata/gcc-9.1.0/gcc/testsuite/gcc.c-torture/compile/20101216-1.c (about)

     1  typedef signed int __int32_t;
     2  typedef unsigned int __uint32_t;
     3  typedef union
     4  {
     5    double value;
     6    struct
     7    {
     8      __uint32_t msw;
     9      __uint32_t lsw;
    10    } parts;
    11  } ieee_double_shape_type;
    12  two52= 4.50359962737049600000e+15,
    13  w6 = -1.63092934096575273989e-03;
    14  double sin_pi(double x)
    15  {
    16   double y,z;
    17   __int32_t n,ix;
    18  ieee_double_shape_type gh_u;
    19   gh_u.value = (x); 
    20  (ix) = gh_u.parts.msw;
    21                  if(ix<0x43300000)
    22   z = y+two52;
    23   ieee_double_shape_type gl_u;
    24   gl_u.value = (z);
    25   (n) = gl_u.parts.lsw;
    26    n &= 1;
    27   switch (n)
    28   {
    29       case 0:
    30  __kernel_sin();
    31       }
    32  }