[all-commits] [llvm/llvm-project] 1878f2: [RISCV] Fix incorrect use of tail agnostic vslideup.

[Zakk Chen via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 1878f240c9ad99f16293831857d1f826e6671cad
      https://github.com/llvm/llvm-project/commit/1878f240c9ad99f16293831857d1f826e6671cad
  Author: Zakk Chen <zakk.chen at sifive.com>
  Date:   2022-05-15 (Sun, 15 May 2022)

  Changed paths:
    M llvm/lib/Target/RISCV/RISCVInstrInfoVPseudos.td
    M llvm/lib/Target/RISCV/RISCVInstrInfoVVLPatterns.td
    M llvm/test/CodeGen/RISCV/rvv/extract-subvector.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-bitcast.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-calling-conv.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-extload-truncstore.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-extract-subvector.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-fp-bitcast.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-fp-buildvec.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-fp-conv.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-fp-setcc.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-fp-shuffles.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-fp2i.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-i2fp.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-insert-i1.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-insert-subvector.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-insert.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-int-buildvec.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-int-exttrunc.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-int-shuffles.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-int.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-mask-buildvec.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-mask-load-store.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-mask-splat.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-masked-gather.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-unaligned.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-vfma-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-vpgather.ll
    M llvm/test/CodeGen/RISCV/rvv/insert-subvector.ll
    M llvm/test/CodeGen/RISCV/rvv/insertelt-fp-rv32.ll
    M llvm/test/CodeGen/RISCV/rvv/insertelt-fp-rv64.ll
    M llvm/test/CodeGen/RISCV/rvv/insertelt-i1.ll
    M llvm/test/CodeGen/RISCV/rvv/insertelt-int-rv32.ll
    M llvm/test/CodeGen/RISCV/rvv/insertelt-int-rv64.ll
    M llvm/test/CodeGen/RISCV/rvv/setcc-fp.ll
    M llvm/test/CodeGen/RISCV/rvv/setcc-integer.ll
    M llvm/test/CodeGen/RISCV/rvv/sink-splat-operands.ll
    M llvm/test/CodeGen/RISCV/rvv/vector-splice.ll
    M llvm/test/CodeGen/RISCV/rvv/vfma-vp.ll

  Log Message:
  -----------
  [RISCV] Fix incorrect use of tail agnostic vslideup.

We need to use tail undisturbed for vslideup to implement
vector insert operation correctly.

Ideally, we cound use the tail agnostic when insert subvector
or element at the end of the vector. This will be in follow-up
patch.

Reviewed By: craig.topper

Differential Revision: https://reviews.llvm.org/D125545