[PATCH] D56813: [AArch64] [Windows] Share unwind codes between epilogues with identical unwind codes

[Sanjin Sijaric via Phabricator via llvm-commits]

ssijaric created this revision.
ssijaric added reviewers: rnk, efriedma, mgrang.
Herald added subscribers: kristof.beyls, javed.absar.

There are cases where we have multiple epilogues that have the exact same unwind code sequence.  This change merges such epilogues into a single epilogue.

This should get us past the assert  "SEH unwind data splitting not yet implemented" in many cases.  We still need to add support for generating multiple .pdata/.xdata sections for those functions that need to be split into fragments.


Repository:
  rL LLVM

https://reviews.llvm.org/D56813

Files:
  lib/MC/MCWin64EH.cpp
  test/CodeGen/AArch64/wineh4.mir
  test/CodeGen/AArch64/wineh8.mir

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