llvm-project

d6524c8d - Reapply "[ORC] Enable JIT support for the compact-unwind frame..." with fixes.

Reapply "[ORC] Enable JIT support for the compact-unwind frame..." with fixes. This reapplies 4f0325873fa (and follow up patches 26fc07d5d88, a001cc0e6cdc, c9bc242e387, and fd174f0ff3e), which were reverted in 212cdc9a377 to investigate bot failures (e.g. https://lab.llvm.org/buildbot/#/builders/108/builds/8502) The fix to address the bot failures was landed in d0052ebbe2e. This patch also restricts construction of the UnwindInfoManager object to Apple platforms (as it won't be used on other platforms).