[all-commits] [llvm/llvm-project] dfb717: [PowerPC] Remove support for VRSAVE save/restore/u...

[Sean Fertile via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: dfb717da1f794c235b81a985a57dc238c82318e6
      https://github.com/llvm/llvm-project/commit/dfb717da1f794c235b81a985a57dc238c82318e6
  Author: Sean Fertile <sd.fertile at gmail.com>
  Date:   2020-09-30 (Wed, 30 Sep 2020)

  Changed paths:
    M llvm/lib/Target/PowerPC/PPCFrameLowering.cpp
    M llvm/lib/Target/PowerPC/PPCISelDAGToDAG.cpp
    M llvm/lib/Target/PowerPC/PPCISelLowering.cpp
    M llvm/lib/Target/PowerPC/PPCInstrInfo.cpp
    M llvm/lib/Target/PowerPC/PPCInstrInfo.h
    M llvm/lib/Target/PowerPC/PPCInstrInfo.td
    M llvm/lib/Target/PowerPC/PPCMachineFunctionInfo.h
    M llvm/lib/Target/PowerPC/PPCRegisterInfo.cpp
    M llvm/lib/Target/PowerPC/PPCRegisterInfo.h
    M llvm/lib/Target/PowerPC/README_ALTIVEC.txt
    M llvm/test/CodeGen/PowerPC/aix-vector-return.ll

  Log Message:
  -----------
  [PowerPC] Remove support for VRSAVE save/restore/update.

After removal of Darwin as a PowerPC subtarget, the VRSAVE
save/restore/spill/update code is no longer needed by any supported
subtarget, so remove it while keeping support for vrsave and related instruction
aliases for inline asm. I've pre-commited tests to document the existing vrsave
handling in relation to @llvm.eh.unwind.init and inline asm usage, as
well as a test which shows a beahviour change on AIX related to
returning vector type as we were wrongly emiting VRSAVE_UPDATE on AIX.