[PATCH] D125646: [ARM SEH 4] [MC] [Win64EH] Optimize the ARM unwind info

[Martin Storsjö via Phabricator via llvm-commits]

mstorsjo created this revision.
mstorsjo added reviewers: efriedma, rnk, zzheng.
Herald added subscribers: hiraditya, kristof.beyls.
Herald added a project: All.
mstorsjo requested review of this revision.
Herald added a project: LLVM.

Use the packed unwind info format if possible; otherwise try to
create a packed epilog.

TODO: Once D125536 <https://reviews.llvm.org/D125536> and D125619 <https://reviews.llvm.org/D125619> are settled, I'll update this one to
include the logic from them too.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D125646

Files:
  llvm/lib/MC/MCWin64EH.cpp
  llvm/test/MC/ARM/seh-epilog-packing.s
  llvm/test/MC/ARM/seh-packed.s

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