================
@@ -222,6 +230,41 @@ struct ModuleAttributes {
NoUndeclaredIncludes(false) {}
};
+/// A reference to either a fully materialized Module object, or
+/// a yet-to-be-deserialized submodule in an AST file.
+class ModuleRef {
+ mutable Module *Existing = nullptr;
+ mutable ExternalSubmoduleSource *ExternalSource = nullptr;
----------------
jansvoboda11 wrote:
You're right, I think the follow-up commit changes `operator*` to not clear
these, but that would increase traffic through the virtual function for later
calls to `operator*`. I pushed a change that uses one bit in `ExternalSource`
to signify whether it's been used to deserialize yet. This prevents calling the
virtual function repeatedly, but also keeps `ExternalSource` around for use in
the follow-up commit.
https://github.com/llvm/llvm-project/pull/194968
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