[all-commits] [llvm/llvm-project] 394450: [RISCV] Remove unecessary early exit in transferBe...

[Luke Lau via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 39445046dc945070f80579c582fb28dc937ec15f
      https://github.com/llvm/llvm-project/commit/39445046dc945070f80579c582fb28dc937ec15f
  Author: Luke Lau <luke at igalia.com>
  Date:   2023-12-12 (Tue, 12 Dec 2023)

  Changed paths:
    M llvm/lib/Target/RISCV/RISCVInsertVSETVLI.cpp
    M llvm/test/CodeGen/RISCV/65704-illegal-instruction.ll
    M llvm/test/CodeGen/RISCV/double_reduct.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-extract-i1.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-masked-gather.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-masked-scatter.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-reduction-fp.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-reduction-int.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-unaligned.ll
    M llvm/test/CodeGen/RISCV/rvv/vreductions-fp-sdnode.ll
    M llvm/test/CodeGen/RISCV/rvv/vreductions-int-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/vreductions-int.ll
    M llvm/test/CodeGen/RISCV/rvv/vsetvli-insert.ll
    M llvm/test/CodeGen/RISCV/rvv/vsetvli-regression.ll

  Log Message:
  -----------
  [RISCV] Remove unecessary early exit in transferBefore (#74040)

Previously we bailed if we encountered a pseudo without a VL op, i.e.
vmv.x.s,
which prevented us from preserving VL and VTYPE. It looks like this was
copied
over from a time whenever this code was operating on the MachineInstrs
in
place, see https://reviews.llvm.org/D127870

However because we no longer mutate the MIs, we can just get rid of this
early
exit which allows us to preserve VL and VTYPE when dealing with vmv.x.s.