[lld] [lld][BP] Avoid ordering ICF'ed sections (PR #126327)

[Ellis Hoag via llvm-commits]

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@@ -117,6 +117,8 @@ DenseMap<const InputSection *, int> lld::macho::runBalancedPartitioning(
         auto *isec = subsec.isec;
         if (!isec || isec->data.empty())
           continue;
+        if (isa<ConcatInputSection>(isec) && !isec->isLive(0))
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ellishg wrote:

Yeah it probably should use `ConcatInputSection` instead of `InputSection`. I think I was following the orderfile implementation which uses `InputSection`. I think this change should be a separate PR, though.

https://github.com/llvm/llvm-project/pull/126327