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================
Comment at: clang/include/clang/Sema/HLSLExternalSemaSource.h:58
+/// them before we initialize the ExternalSemaSource base class.
+struct ChainedHLSLExternalSemaSourceMembers {
+  ChainedHLSLExternalSemaSourceMembers(ExternalSemaSource *ExtSema)
----------------
beanz wrote:
> IIUC, this code just exists to make sure that the `ASTReader` deserializes 
> before the external sema source starts adding things. Is that correct?
> 
> If so, you don't need to do this, instead you can just add this code to 
> `InitializeSema()` to force the `ASTReader` to de-serialize the decls:
> 
> ```
> // If the translation unit has external storage force external decls to load.
> if (AST.getTranslationUnitDecl()->hasExternalLexicalStorage())
>     (void)AST.getTranslationUnitDecl()->decls_begin();
> ```
Still need this to make sure HLSLSema and ExternalSema are initialized before  
MultiplexExternalSemaSource.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D132421/new/

https://reviews.llvm.org/D132421

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