[all-commits] [llvm/llvm-project] 70289e: [RISCV][LegalizeTypes] Try to expand BSWAP before ...

[Craig Topper via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 70289ea6f591bd39c631f1eee3e6f2622fbc1d46
      https://github.com/llvm/llvm-project/commit/70289ea6f591bd39c631f1eee3e6f2622fbc1d46
  Author: Craig Topper <craig.topper at sifive.com>
  Date:   2021-01-31 (Sun, 31 Jan 2021)

  Changed paths:
    M llvm/include/llvm/CodeGen/TargetLowering.h
    M llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
    M llvm/lib/CodeGen/SelectionDAG/LegalizeIntegerTypes.cpp
    M llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp
    M llvm/test/CodeGen/RISCV/bswap-ctlz-cttz-ctpop.ll
    M llvm/test/CodeGen/RISCV/rv64Zbb.ll
    M llvm/test/CodeGen/RISCV/rv64Zbp.ll

  Log Message:
  -----------
  [RISCV][LegalizeTypes] Try to expand BSWAP before promoting if the promoted BSWAP would expand anyway.

If we're going to end up expanding anyway, we should do it early
so we don't create extra operations to handle the bytes added by
promotion.

This is helfpul on RISCV where we might have to promote i16 all
the way to i64.

Differential Revision: https://reviews.llvm.org/D95756