[all-commits] [llvm/llvm-project] 3f0404: [AArch64] Restore Z-registers before P-registers (...

[CarolineConcatto via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 3f0404aae7ed2f7138526e1bcd100a60dfe08227
      https://github.com/llvm/llvm-project/commit/3f0404aae7ed2f7138526e1bcd100a60dfe08227
  Author: CarolineConcatto <caroline.concatto at arm.com>
  Date:   2024-02-19 (Mon, 19 Feb 2024)

  Changed paths:
    M llvm/lib/Target/AArch64/AArch64FrameLowering.cpp
    M llvm/test/CodeGen/AArch64/framelayout-sve-calleesaves-fix.mir
    M llvm/test/CodeGen/AArch64/framelayout-sve.mir
    M llvm/test/CodeGen/AArch64/sme-streaming-compatible-interface.ll
    M llvm/test/CodeGen/AArch64/sme-streaming-interface.ll
    M llvm/test/CodeGen/AArch64/sme2-intrinsics-ld1.ll
    M llvm/test/CodeGen/AArch64/sme2-intrinsics-ldnt1.ll
    M llvm/test/CodeGen/AArch64/stack-probing-sve.ll
    M llvm/test/CodeGen/AArch64/sve-alloca.ll
    M llvm/test/CodeGen/AArch64/sve-calling-convention-mixed.ll
    M llvm/test/CodeGen/AArch64/sve-tailcall.ll
    M llvm/test/CodeGen/AArch64/unwind-preserved.ll

  Log Message:
  -----------
  [AArch64] Restore Z-registers before P-registers (#79623)

This is needed by PR#77665[1] that uses a P-register while restoring
Z-registers.

The reverse for SVE register restore in the epilogue was added to
guarantee performance, but further work was done to improve sve frame
restore and besides that the schedule also may change the order of the
restore, undoing the reverse restore.

[1]https://github.com/llvm/llvm-project/pull/77665



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