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Allow deadargelim to change return types even though now values were dead. This

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again canonicalizes {i32} into i32 and {} into void.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53610 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Matthijs Kooijman 2008-07-15 14:42:31 +00:00
parent d1d1de7f39
commit 4f72368529
1 changed files with 1 additions and 11 deletions
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12
lib/Transforms/IPO/DeadArgumentElimination.cpp
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@ -601,8 +601,6 @@ bool DAE::RemoveDeadStuffFromFunction(Function *F) {
const Type *RetTy = FTy->getReturnType();
const Type *NRetTy = NULL;
unsigned RetCount = NumRetVals(F);
// Explicitly track if anything changed, for debugging.
bool Changed = false;
// -1 means unused, other numbers are the new index
SmallVector<int, 5> NewRetIdxs(RetCount, -1);
std::vector<const Type*> RetTypes;
@ -621,7 +619,6 @@ bool DAE::RemoveDeadStuffFromFunction(Function *F) {
++NumRetValsEliminated;
DOUT << "DAE - Removing return value " << i << " from "
<< F->getNameStart() << "\n";
Changed = true;
}
}
else
@ -633,9 +630,8 @@ bool DAE::RemoveDeadStuffFromFunction(Function *F) {
DOUT << "DAE - Removing return value from " << F->getNameStart()
<< "\n";
++NumRetValsEliminated;
Changed = true;
}
if (RetTypes.size() > 1 || (STy && STy->getNumElements()==RetTypes.size()))
if (RetTypes.size() > 1)
// More than one return type? Return a struct with them. Also, if we used
// to return a struct and didn't change the number of return values,
// return a struct again. This prevents changing {something} into
@ -688,7 +684,6 @@ bool DAE::RemoveDeadStuffFromFunction(Function *F) {
++NumArgumentsEliminated;
DOUT << "DAE - Removing argument " << i << " (" << I->getNameStart()
<< ") from " << F->getNameStart() << "\n";
Changed = true;
}
}
@ -714,11 +709,6 @@ bool DAE::RemoveDeadStuffFromFunction(Function *F) {
if (NFTy == FTy)
return false;
// The function type is only allowed to be different if we actually left out
// an argument or return value.
assert(Changed && "Function type changed while no arguments or return values"
"were removed!");
// Create the new function body and insert it into the module...
Function *NF = Function::Create(NFTy, F->getLinkage());
NF->copyAttributesFrom(F);