[PATCH] D156716: [AArch64][PAC] Check authenticated LR value during tail call

[Anatoly Trosinenko via Phabricator via llvm-commits]

atrosinenko updated this revision to Diff 557353.
atrosinenko added a comment.

Rebased and updated the patch a bit more:

- in `getOutliningCandidateInfo`, adjusted `SequenceSize` variable before its first use
- updated code comments
- skipped checking LR if Scadow Call Stack is enabled: the LR value just before TCRETURN* instruction is anyway not the one produced by AUT* (and we cannot check right after AUT* because we cannot be sure which register is usable as a temporary)


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D156716/new/

https://reviews.llvm.org/D156716

Files:
  llvm/lib/Target/AArch64/AArch64FrameLowering.cpp
  llvm/lib/Target/AArch64/AArch64InstrInfo.cpp
  llvm/lib/Target/AArch64/AArch64InstrInfo.h
  llvm/lib/Target/AArch64/AArch64MachineFunctionInfo.cpp
  llvm/lib/Target/AArch64/AArch64MachineFunctionInfo.h
  llvm/lib/Target/AArch64/AArch64PointerAuth.cpp
  llvm/lib/Target/AArch64/AArch64PointerAuth.h
  llvm/lib/Target/AArch64/AArch64Subtarget.cpp
  llvm/lib/Target/AArch64/AArch64Subtarget.h
  llvm/test/CodeGen/AArch64/sign-return-address-tailcall.ll

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