[all-commits] [llvm/llvm-project] 4cc152: [AArch64] Correct position of CFI Instruction for ...

[Daniel Kiss via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 4cc152c823ec0298b3962b5a09de6f74f5c1b16a
      https://github.com/llvm/llvm-project/commit/4cc152c823ec0298b3962b5a09de6f74f5c1b16a
  Author: Daniel Kiss <daniel.kiss at arm.com>
  Date:   2025-05-06 (Tue, 06 May 2025)

  Changed paths:
    M llvm/lib/Target/AArch64/AArch64PointerAuth.cpp
    M llvm/test/CodeGen/AArch64/machine-outliner-retaddr-sign-cfi.ll
    M llvm/test/CodeGen/AArch64/machine-outliner-retaddr-sign-diff-scope-same-key.ll
    M llvm/test/CodeGen/AArch64/machine-outliner-retaddr-sign-non-leaf.ll
    M llvm/test/CodeGen/AArch64/machine-outliner-retaddr-sign-regsave.mir
    M llvm/test/CodeGen/AArch64/machine-outliner-retaddr-sign-same-scope-diff-key.ll
    M llvm/test/CodeGen/AArch64/machine-outliner-retaddr-sign-sp-mod.mir
    M llvm/test/CodeGen/AArch64/machine-outliner-retaddr-sign-subtarget.ll
    M llvm/test/CodeGen/AArch64/machine-outliner-retaddr-sign-thunk.ll
    M llvm/test/CodeGen/AArch64/pacbti-llvm-generated-funcs-2.ll
    M llvm/test/CodeGen/AArch64/sign-return-address-cfi-negate-ra-state.ll
    M llvm/test/CodeGen/AArch64/sign-return-address.ll
    M llvm/test/CodeGen/MIR/AArch64/return-address-signing.mir

  Log Message:
  -----------
  [AArch64] Correct position of CFI Instruction for Pointer Authentication (#137795)

This reverts partially this commit
0b73b5af60f2c544892b9dd68b4fa43eeff52fc1.
This is not a clear revert because other changes already landed.
CFI directives like `.cfi_negate_ra_state` must be emitted after the
instruction.
If the execution is stopped before the `paciasp` instruction is executed
the debugger/unwinder would try to authenticated the return address as
the `.cfi_negate_ra_state` already indicates it got signed.

fixes: #137802



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