modernc.org/ccgo/v3@v3.16.14/lib/testdata/gcc-9.1.0/gcc/testsuite/gcc.c-torture/compile/pr42196-1.c (about)

     1  union U
     2  {
     3    double d;
     4    __complex__ int c;
     5  };
     6  
     7  double gd;
     8  extern double bar (union U);
     9  
    10  double foo (int b, double d, int c1, int c2)
    11  {
    12    union U u;
    13    double r;
    14  
    15    if (b)
    16      {
    17        u.d = d;
    18        r = u.d;
    19      }
    20    else
    21      {
    22        __real__ u.c = c1;
    23        __imag__ u.c = c2;
    24        r = bar (u);
    25      }
    26  
    27    return r;
    28  }