[lld] [lld][GNU Properties] Refactor storage of PAuth ABI core info (PR #141920)

[Peter Smith via llvm-commits]

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@@ -695,7 +701,7 @@ struct Ctx : CommonLinkerContext {
 
   llvm::raw_fd_ostream openAuxiliaryFile(llvm::StringRef, std::error_code &);
 
-  ArrayRef<uint8_t> aarch64PauthAbiCoreInfo;
+  std::optional<AArch64PauthAbiCoreInfo> aarch64PauthAbiCoreInfo;
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smithp35 wrote:

In theory yes, with nullptr as the empty state, the disadvantage is that it would require dynamic memory allocation for AArch64PauthABICoreInfo when we see it, which seems heavyweight for two 64-bit values.

https://github.com/llvm/llvm-project/pull/141920