[lld] [llvm] [DTLTO][ELF][COFF] Add archive support for DTLTO. (PR #157043)

[Teresa Johnson via llvm-commits]

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@@ -73,12 +73,10 @@ SmallString<64> computeThinArchiveMemberPath(const StringRef ArchivePath,
 // This function uses a cache to avoid repeatedly reading the same file.
 // It reads only the header portion (magic bytes) of the file to identify
 // the archive type.
-Expected<bool> isThinArchive(const StringRef ArchivePath) {
-  static StringMap<bool> ArchiveFiles;
-
+Expected<bool> isThinArchive(lto::DTLTO *Dtlto, const StringRef ArchivePath) {
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teresajohnson wrote:

Just make this a private member of the DTLTO class so that you don't have to pass in the object.

https://github.com/llvm/llvm-project/pull/157043