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ArgumentPromotion: Remove ancient workaround for a bug in the C backend.

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Fun fact: The CBE learned how to deal with this situation before it was removed.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164918 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Benjamin Kramer 2012-09-30 17:31:56 +00:00
parent b620469223
commit 72f0976c1b
1 changed files with 1 additions and 19 deletions
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20
lib/Transforms/IPO/ArgumentPromotion.cpp
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@ -592,14 +592,6 @@ CallGraphNode *ArgPromotion::DoPromotion(Function *F,
Type *RetTy = FTy->getReturnType();
// Work around LLVM bug PR56: the CWriter cannot emit varargs functions which
// have zero fixed arguments.
bool ExtraArgHack = false;
if (Params.empty() && FTy->isVarArg()) {
ExtraArgHack = true;
Params.push_back(Type::getInt32Ty(F->getContext()));
}
// Construct the new function type using the new arguments.
FunctionType *NFTy = FunctionType::get(RetTy, Params, FTy->isVarArg());
@ -711,9 +703,6 @@ CallGraphNode *ArgPromotion::DoPromotion(Function *F,
}
}
if (ExtraArgHack)
Args.push_back(Constant::getNullValue(Type::getInt32Ty(F->getContext())));
// Push any varargs arguments on the list.
for (; AI != CS.arg_end(); ++AI, ++ArgIndex) {
Args.push_back(*AI);
@ -870,16 +859,9 @@ CallGraphNode *ArgPromotion::DoPromotion(Function *F,
}
// Increment I2 past all of the arguments added for this promoted pointer.
for (unsigned i = 0, e = ArgIndices.size(); i != e; ++i)
++I2;
std::advance(I2, ArgIndices.size());
}
// Notify the alias analysis implementation that we inserted a new argument.
if (ExtraArgHack)
AA.copyValue(Constant::getNullValue(Type::getInt32Ty(F->getContext())),
NF->arg_begin());
// Tell the alias analysis that the old function is about to disappear.
AA.replaceWithNewValue(F, NF);