zero arg vararg functions, pass undef instead of 'int 0', which is cheaper.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32634
91177308-0d34-0410-b5e6-
96231b3b80d8
// Work around LLVM bug PR56: the CWriter cannot emit varargs functions which
// have zero fixed arguments.
//
- // FIXME: once this bug is fixed in the CWriter, this hack should be removed.
- //
bool ExtraArgHack = false;
if (Params.empty() && FTy->isVarArg()) {
ExtraArgHack = true;
Args.push_back(*AI);
if (ExtraArgHack)
- Args.push_back(Constant::getNullValue(Type::IntTy));
+ Args.push_back(UndefValue::get(Type::IntTy));
// Push any varargs arguments on the list
for (; AI != CS.arg_end(); ++AI)