[all-commits] [llvm/llvm-project] e40625: [RISCV] Disable matchSplatAsGather for i1 vectors ...

Craig Topper via All-commits all-commits at lists.llvm.org
Mon Jun 13 13:41:55 PDT 2022

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: e4062522d33160ffa538bbc6eb8ddf945f534aad
  Author: Craig Topper <craig.topper at sifive.com>
  Date:   2022-06-13 (Mon, 13 Jun 2022)

  Changed paths:
    M llvm/lib/Target/RISCV/RISCVISelLowering.cpp
    M llvm/test/CodeGen/RISCV/rvv/vsplats-i1.ll

  Log Message:
  [RISCV] Disable matchSplatAsGather for i1 vectors to prevent creating illegal nodes.

We were incorrectly creating a VRGATHER node with i1 vector type. We
could support this by promoting the mask to i8 and truncating it, but
for now I want to prevent the crash.

Fixes PR56007.

Reviewed By: reames

Differential Revision: https://reviews.llvm.org/D127681

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