Lang Hames fc734da795 [JITLink][MachO][arm64] Add support for splitting compact-unwind sections. ...

CompactUnwindSplitter splits compact-unwind sections on record boundaries and
adds keep-alive edges from target functions back to their respective records.

In MachO_arm64.cpp, a CompactUnwindSplitter pass is added to the pre-prune pass
list when setting up the standard pipeline.

This patch does not provide runtime support for compact-unwind, but is a first
step towards enabling it.

2021-09-28 17:29:05 -07:00

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