[PATCH] D135728: [lld-macho] Canonicalize personality pointers in EH frames

[Jez Ng via Phabricator via llvm-commits]

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We already do this for personality pointers referenced from compact
unwind entries; this patch extends that behavior to personalities
referenced via EH frames as well.

This reduces the number of distinct personalities we need in the final
binary, and helps us avoid hitting the "too many personalities" error.

I renamed `UnwindInfoSection::prepareRelocations()` to simply `prepare`
since we now do some non-reloc-specific stuff within.

Fixes #58277.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D135728

Files:
  lld/MachO/UnwindInfoSection.cpp
  lld/MachO/UnwindInfoSection.h
  lld/MachO/Writer.cpp
  lld/test/MachO/eh-frame-personality-dedup.s

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