[lld] [lld][MachO] Add N_COLD_FUNC support (PR #183909)

[via llvm-commits]

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@@ -32,6 +32,9 @@ struct BPOrdererELF : lld::BPOrderer<BPOrdererELF> {
   static bool isCodeSection(const Section &sec) {
     return sec.flags & ELF::SHF_EXECINSTR;
   }
+  // ELF handles cold functions via separate output sections (.text.unlikely,
+  // .text.split), so no cold splitting is needed within BP.
+  static bool isColdSection(const Section &sec) { return false; }
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alx32 wrote:

I'm OK with this as long was we're sure we will follow up with making BP + Cold work appropriately. 

https://github.com/llvm/llvm-project/pull/183909