modernc.org/ccgo/v3@v3.16.14/lib/testdata/gcc-9.1.0/gcc/testsuite/gcc.c-torture/compile/pr42196-2.c (about)

     1  union U
     2  {
     3    __complex__ int ci;
     4    __complex__ float cf;
     5  };
     6  
     7  float gd;
     8  extern float bar (union U);
     9  
    10  float foo (int b, double f1, double f2, int c1, int c2)
    11  {
    12    union U u;
    13    double r;
    14  
    15    if (b)
    16      {
    17        __real__ u.cf = f1;
    18        __imag__ u.cf = f2;
    19      }
    20    else
    21      {
    22        __real__ u.ci = c1;
    23        __imag__ u.ci = c2;
    24      }
    25  
    26    r = bar (u);
    27    return r;
    28  }