modernc.org/ccgo/v3@v3.16.14/lib/testdata/gcc-9.1.0/gcc/testsuite/gcc.c-torture/compile/pr27341-2.c (about)

     1  void zgemm_ (const int*, const double*);
     2  extern void matmul_c8 (_Complex double * dest)
     3  {
     4    const int  ldc = 0;
     5    const double zero = 0;
     6    zgemm_ ( &zero, &ldc);
     7    dest[1] += 1 ;
     8  }