[PATCH] D112329: [AArch64] Async unwind (4/6) - Refactor generation of shadow call stack prologue/epilogue

[Momchil Velikov via Phabricator via llvm-commits]

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This patch is in preparation for the async unwind CFI.

Move the emission of the shadow call stack prologue/epilogue
instructions to the `emitPrologue`/`emitEpilogue`. This greatly
simplifies especially epilogue generation and makes unnecessary some
quite fragile code, that tries to skip over those


https://reviews.llvm.org/D112329

Files:
  llvm/lib/Target/AArch64/AArch64FrameLowering.cpp

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