================
@@ -2101,6 +2102,17 @@ class DeclContext {
/// another pointer.
mutable Decl *LastDecl = nullptr;
+ /// A primary context whose identity cannot change. Incomplete C++ records
+ /// and contexts with mutable primary identities remain uncached.
+ /// Relaxed atomics permit cache population during concurrent read-only AST
+ /// traversal; they do not synchronize mutations to the AST itself.
+ mutable std::atomic<DeclContext *> CachedPrimaryContext = nullptr;
----------------
joker-eph wrote:
No we don't, this is also part of why it is still draft, I have a few things to
fixup. But I couldn't keep track of all the diff locally, so I pushed draft
PRs. I thought no one would be notified, seems like draft PRs aren't as
"stealth" as I thought, sorry for taking some of your time here!
https://github.com/llvm/llvm-project/pull/223047
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