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[IR] Use llvm::is_detected (NFC) #137562

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Merged
merged 1 commit into from
Apr 28, 2025
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[IR] Use llvm::is_detected (NFC) #137562

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19 changes: 6 additions & 13 deletions llvm/include/llvm/IR/Metadata.h
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Original file line number Diff line number Diff line change
Expand Up @@ -619,23 +619,16 @@ class LocalAsMetadata : public ValueAsMetadata {
namespace mdconst {

namespace detail {
template <typename U, typename V>
using check_has_dereference = decltype(static_cast<V>(*std::declval<U &>()));

template <class T> T &make();
template <class T, class Result> struct HasDereference {
using Yes = char[1];
using No = char[2];
template <size_t N> struct SFINAE {};
template <typename U, typename V>
static constexpr bool HasDereference =
is_detected<check_has_dereference, U, V>::value;

template <class U, class V>
static Yes &hasDereference(SFINAE<sizeof(static_cast<V>(*make<U>()))> * = 0);
template <class U, class V> static No &hasDereference(...);

static const bool value =
sizeof(hasDereference<T, Result>(nullptr)) == sizeof(Yes);
};
template <class V, class M> struct IsValidPointer {
static const bool value = std::is_base_of<Constant, V>::value &&
HasDereference<M, const Metadata &>::value;
HasDereference<M, const Metadata &>;
};
template <class V, class M> struct IsValidReference {
static const bool value = std::is_base_of<Constant, V>::value &&
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