[all-commits] [llvm/llvm-project] d286ef: [AArch64][PAC] Lower direct authenticated calls to...

[Ahmed Bougacha via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: d286efeb1d0d3e135901dd07535cc68aed39a758
      https://github.com/llvm/llvm-project/commit/d286efeb1d0d3e135901dd07535cc68aed39a758
  Author: Ahmed Bougacha <ahmed at bougacha.org>
  Date:   2024-07-15 (Mon, 15 Jul 2024)

  Changed paths:
    M llvm/lib/CodeGen/GlobalISel/CallLowering.cpp
    M llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp
    M llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
    M llvm/test/CodeGen/AArch64/ptrauth-call.ll
    M llvm/test/CodeGen/AArch64/ptrauth-invoke.ll

  Log Message:
  -----------
  [AArch64][PAC] Lower direct authenticated calls to ptrauth constants. (#97664)

This tries to turn indirect ptrauth calls into direct calls, using
`ConstantPtrAuth::isKnownEquivalent` to compare the `ConstantPtrAuth`
target with the ptrauth call bundle.

This should be straightforward, other than the somewhat awkward GISel
handling, which has a handshake between CallLowering and IRTranslator to
elide the ptrauth when possible.



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