Update comments now that LLVM PR3861 has been fixed. However, since conditionally removing the workaround makes the ABI dependent on LLVM version, I reconsidered that. (The same revision of LDC compiling for the same target should probably produce code that follows the same ABI, right?)

void main()
{
  void foo() {}

  auto dg = &foo;

  if(dg.funcptr is null)
  { assert(0); }
}