[llvm] [llvm-ifs] Treat unknown symbol types as error. (PR #75872)

[Petr Hosek via llvm-commits]

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@@ -201,6 +201,12 @@ Expected<std::unique_ptr<IFSStub>> ifs::readIFSFromBuffer(StringRef Buf) {
           "IFS arch '" + *Stub->Target.ArchString + "' is unsupported");
     Stub->Target.Arch = eMachine;
   }
+  for (const auto &item : Stub->Symbols) {
+    if (item.Type == IFSSymbolType::Unknown)
+      return createStringError(
+          std::make_error_code(std::errc::invalid_argument),
+          "IFS symbol type for symbol '" + item.Name + "' is unsupported");
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petrhosek wrote:

This is just a suggestion, but I'd use `"unsupported type for symbol '" + item.Name + "'"`.

https://github.com/llvm/llvm-project/pull/75872