[llvm] fixed #95641 pointless string copy (PR #127325)

[via llvm-commits]

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@@ -1966,9 +1966,7 @@ class RecordKeeper {
     return It == ExtraGlobals.end() ? nullptr : It->second;
   }
 
-  void saveInputFilename(std::string Filename) {
-    InputFilename = Filename;
-  }
+  void saveInputFilename(std::string &&Filename) { InputFilename = Filename; }
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sommersun wrote:

ok, both use 
`void saveInputFilename(std::string &&Filename) { InputFilename = std::move(Filename); }`

https://github.com/llvm/llvm-project/pull/127325