[all-commits] [llvm/llvm-project] 1a8ba9: [RISCV] Improve selection of PACKW.

[Craig Topper via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 1a8ba9e19f49dc0fc82615db13ad15f301077145
      https://github.com/llvm/llvm-project/commit/1a8ba9e19f49dc0fc82615db13ad15f301077145
  Author: Craig Topper <craig.topper at sifive.com>
  Date:   2022-11-13 (Sun, 13 Nov 2022)

  Changed paths:
    M llvm/lib/Target/RISCV/RISCVISelDAGToDAG.cpp
    M llvm/lib/Target/RISCV/RISCVInstrInfoZb.td
    M llvm/test/CodeGen/RISCV/rv32zbkb.ll
    M llvm/test/CodeGen/RISCV/rv64zbkb.ll

  Log Message:
  -----------
  [RISCV] Improve selection of PACKW.

Use hasAllWUsers to check if the upper bits are ignored so we can
use PACKW even when no sign_extend_inreg is present before the OR.