[lld] [lld][MachO] Tail merge strings (PR #161262)

[Kyungwoo Lee via llvm-commits]

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@@ -1776,8 +1817,24 @@ void DeduplicatedCStringSection::finalizeContents() {
     // only need to assign the offset.
     piece.outSecOff = it->second;
   }
-  for (CStringInputSection *isec : inputs)
+  for (CStringInputSection *isec : inputs) {
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kyulee-com wrote:

Can you add some comment on this loop? It appears the previous loop layouts the substrings while the loop resolves the substring offsets.

https://github.com/llvm/llvm-project/pull/161262