[PATCH] D69097: [AArch64][MachineOutliner] Return address signing for outlined functions

[David Tellenbach via Phabricator via llvm-commits]

tellenbach created this revision.
Herald added subscribers: llvm-commits, hiraditya, kristof.beyls.
Herald added a project: LLVM.

During AArch64 frame lowering instructions to enable return address
signing are inserted into function if needed. Functions generated during
machine outlining don't run through target frame lowering and hence are
missing such instructions.

This patch inserts these yet missing instructions if all functions of
final outlining candidates...

1. ...need return address signing.
2. ...agree on the type of key their return address should be signed with.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D69097

Files:
  llvm/lib/Target/AArch64/AArch64InstrInfo.cpp
  llvm/test/CodeGen/AArch64/machine-outliner-sign-return-address-akey.ll
  llvm/test/CodeGen/AArch64/machine-outliner-sign-return-address-bkey.ll

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