[all-commits] [llvm/llvm-project] 898891: [lld-macho] Improve ICF thunk folding logic (#131186)

[alx32 via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 89889149cd21bb70c9a545fc18c1bfc1467b1b04
      https://github.com/llvm/llvm-project/commit/89889149cd21bb70c9a545fc18c1bfc1467b1b04
  Author: alx32 <103613512+alx32 at users.noreply.github.com>
  Date:   2025-03-14 (Fri, 14 Mar 2025)

  Changed paths:
    M lld/MachO/ICF.cpp

  Log Message:
  -----------
  [lld-macho] Improve ICF thunk folding logic (#131186)

Refactor to add some early return logic to `applySafeThunksToRange` so
that we completely skip irrelevant ranges.

Also add a check for `isCodeSection` to ensure we only apply branch
thunks to code section (they don't make sense for anything else).
Currently this isn't an issue since there are no `keepUnique` non-code
sections - but this is not a hard restriction and may be implemented in
the future, so we should be able to handle (i.e. avoid) this scenario.



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