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ListInit::convertInitializerTo: avoid foldingset lookup if nothing changed

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llvm-svn: 288647
This commit is contained in:
Matthias Braun 2016-12-05 06:41:47 +00:00
parent f2a4047172
commit 8c8bbdcc14
1 changed files with 13 additions and 4 deletions
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17
lib/TableGen/Record.cpp
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@ -533,19 +533,28 @@ void ListInit::Profile(FoldingSetNodeID &ID) const {
}
Init *ListInit::convertInitializerTo(RecTy *Ty) const {
if (getType() == Ty)
return const_cast<ListInit*>(this);
if (auto *LRT = dyn_cast<ListRecTy>(Ty)) {
std::vector<Init*> Elements;
Elements.reserve(getValues().size());
// Verify that all of the elements of the list are subclasses of the
// appropriate class!
bool Changed = false;
RecTy *ElementType = LRT->getElementType();
for (Init *I : getValues())
if (Init *CI = I->convertInitializerTo(LRT->getElementType()))
if (Init *CI = I->convertInitializerTo(ElementType)) {
Elements.push_back(CI);
else
if (CI != I)
Changed = true;
} else
return nullptr;
if (isa<ListRecTy>(getType()))
return ListInit::get(Elements, Ty);
if (!Changed)
return const_cast<ListInit*>(this);
return ListInit::get(Elements, Ty);
}
return nullptr;