[llvm] big archive recognition by the llvm-symbolizer (PR #150401)

[via llvm-commits]

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@@ -226,6 +238,20 @@ class LLVMSymbolizer {
   std::map<std::pair<std::string, std::string>, std::unique_ptr<ObjectFile>>
       ObjectForUBPathAndArch;
 
+  struct ArchiveCacheKey {
+    std::string ArchivePath;  // Storage for StringRef
+    std::string MemberName;   // Storage for StringRef
+    std::string ArchName;     // Storage for StringRef
+
+    // Required for map comparison
+    bool operator<(const ArchiveCacheKey &Other) const {
+      return std::tie(ArchivePath, MemberName, ArchName) < 
+             std::tie(Other.ArchivePath, Other.MemberName, Other.ArchName);
+    }
+  };
+
+  std::map<ArchiveCacheKey, std::unique_ptr<ObjectFile>> ObjectForArchivePathAndArch;
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midhuncodes7 wrote:

Previous usage `ObjectForUBPathAndArch` uses a `std::map` and the same is adapted. Let me know if we've to change this to `llvm::DenseMap` instead

https://github.com/llvm/llvm-project/pull/150401