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[IR] Simplify HasCachedHash with is_detected (NFC) #159510

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Merged
merged 1 commit into from
Sep 18, 2025
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[IR] Simplify HasCachedHash with is_detected (NFC) #159510

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9 changes: 2 additions & 7 deletions llvm/lib/IR/Metadata.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -986,15 +986,10 @@ static T *uniquifyImpl(T *N, DenseSet<T *, InfoT> &Store) {
}

template <class NodeTy> struct MDNode::HasCachedHash {
using Yes = char[1];
using No = char[2];
template <class U, U Val> struct SFINAE {};

template <class U>
static Yes &check(SFINAE<void (U::*)(unsigned), &U::setHash> *);
template <class U> static No &check(...);
using check = decltype(static_cast<void (U::*)(unsigned)>(&U::setHash));

static const bool value = sizeof(check<NodeTy>(nullptr)) == sizeof(Yes);
static constexpr bool value = is_detected<check, NodeTy>::value;
};

MDNode *MDNode::uniquify() {
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