[all-commits] [llvm/llvm-project] 3a26fe: [RISCV] Lower fixed-length mgather/mscatter for zv...

[Luke Lau via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 3a26feb607c8cecc13d6ca4ed5213c3f9c10932c
      https://github.com/llvm/llvm-project/commit/3a26feb607c8cecc13d6ca4ed5213c3f9c10932c
  Author: Luke Lau <luke at igalia.com>
  Date:   2024-11-06 (Wed, 06 Nov 2024)

  Changed paths:
    M llvm/lib/Target/RISCV/RISCVISelLowering.cpp
    M llvm/lib/Target/RISCV/RISCVTargetTransformInfo.h
    M llvm/test/Analysis/CostModel/RISCV/fixed-vector-gather.ll
    M llvm/test/Analysis/CostModel/RISCV/fixed-vector-scatter.ll
    M llvm/test/Analysis/CostModel/RISCV/scalable-gather.ll
    M llvm/test/Analysis/CostModel/RISCV/scalable-scatter.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-masked-gather.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-masked-scatter.ll

  Log Message:
  -----------
  [RISCV] Lower fixed-length mgather/mscatter for zvfhmin/zvfbfmin (#114945)

In preparation for allowing zvfhmin and zvfbfmin in
isLegalElementTypeForRVV, this lowers fixed-length masked gathers and
scatters

We need to mark f16 and bf16 as legal in isLegalMaskedGatherScatter
otherwise ScalarizeMaskedMemIntrin will just scalarize them, but we can
move this back into isLegalElementTypeForRVV afterwards.

The scalarized codegen required #114938, #114927 and #114915 to not
crash.



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