================
@@ -23,6 +23,55 @@
namespace clang {
+inline CXXRecordDecl *Type::getAsCXXRecordDecl() const {
+ const auto *TT = dyn_cast<TagType>(CanonicalType);
+ if (!isa_and_present<RecordType, InjectedClassNameType>(TT))
+ return nullptr;
+ auto *TD = TT->getOriginalDecl();
+ if (!isa<InjectedClassNameType>(TT) && !isa<CXXRecordDecl>(TD))
+ return nullptr;
----------------
Sirraide wrote:
> Yeah, from my experience experimenting for the previous patch, touching the
> type Kind field is almost free, but doing the indirection to the decl Kind
> field can be expensive. For example, we could have gotten rid of EnumType,
> RecordType and InjectedClassNameType as a simplification, as these types are
> basically the same in all ways except the kinds of declarations they store.
>
> So we could have kept just TagType. Except that whenever you need to test you
> have a record, having a different TypeClass allows you to quickly bail out
> without having to touch the declaration, otherwise you get a a performance
> regression.
I see; I figured it might be something like that.
https://github.com/llvm/llvm-project/pull/155051
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