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when inserting a dummy argument to work-around the CBE not supporting

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zero arg vararg functions, pass undef instead of 'int 0', which is cheaper.

llvm-svn: 32634
This commit is contained in:
Chris Lattner 2006-12-16 21:21:53 +00:00
parent 8b1e4d1edf
commit 6bdae11796
1 changed files with 1 additions and 3 deletions
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4
lib/Transforms/IPO/DeadArgumentElimination.cpp
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@ -499,8 +499,6 @@ void DAE::RemoveDeadArgumentsFromFunction(Function *F) {
// 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;
@ -530,7 +528,7 @@ void DAE::RemoveDeadArgumentsFromFunction(Function *F) {
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)