[all-commits] [llvm/llvm-project] 4fbb16: AArch64/GlobalISel: Drop redundant IMPLICIT_DEFs b...

[Matt Arsenault via All-commits]

  Branch: refs/heads/users/arsenm/aarch64/gisel-ptrauth-redundant-implicit-def
  Home:   https://github.com/llvm/llvm-project
  Commit: 4fbb16de5edfb24e2c75d9ab5e902d23f320b4ce
      https://github.com/llvm/llvm-project/commit/4fbb16de5edfb24e2c75d9ab5e902d23f320b4ce
  Author: Matt Arsenault <Matthew.Arsenault at amd.com>
  Date:   2026-09-29 (Tue, 29 Sep 2026)

  Changed paths:
    M llvm/lib/Target/AArch64/GISel/AArch64InstructionSelector.cpp
    M llvm/test/CodeGen/AArch64/ptrauth-isel.ll

  Log Message:
  -----------
  AArch64/GlobalISel: Drop redundant IMPLICIT_DEFs before the ptrauth pseudos

MOVaddrPAC, LOADgotPAC, AUTPAC and AUTx16x17 all fully define X16/X17;
none of them read X17, and the only X16 read is the one the surrounding
code sets up with a COPY.

Co-Authored-By: Claude Opus 5 <noreply at anthropic.com>



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