[llvm] All function merger to be run during LTO link with gold plugin (PR #121343)

[Teresa Johnson via llvm-commits]

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@@ -222,6 +222,10 @@ namespace options {
   static std::string cs_profile_path;
   static bool cs_pgo_gen = false;
 
+  // When true, MergeFunctions pass is used
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teresajohnson wrote:

Nit: these 2 comment lines can be combined

https://github.com/llvm/llvm-project/pull/121343