[all-commits] [llvm/llvm-project] 3e55ac: [RISCV] Strength reduce mul by 2^N - 2^M (#88983)

[Philip Reames via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 3e55ac94c7502d69c71bda0948a8353a6622da6e
      https://github.com/llvm/llvm-project/commit/3e55ac94c7502d69c71bda0948a8353a6622da6e
  Author: Philip Reames <preames at rivosinc.com>
  Date:   2024-06-20 (Thu, 20 Jun 2024)

  Changed paths:
    M llvm/lib/Target/RISCV/RISCVISelLowering.cpp
    M llvm/test/CodeGen/RISCV/mul.ll
    M llvm/test/CodeGen/RISCV/rv32xtheadba.ll
    M llvm/test/CodeGen/RISCV/rv32zba.ll
    M llvm/test/CodeGen/RISCV/rv64-legal-i32/rv64zba.ll
    M llvm/test/CodeGen/RISCV/rv64xtheadba.ll
    M llvm/test/CodeGen/RISCV/rv64zba.ll
    M llvm/test/CodeGen/RISCV/rvv/calling-conv-fastcc.ll
    M llvm/test/CodeGen/RISCV/rvv/extract-subvector.ll
    M llvm/test/CodeGen/RISCV/rvv/mscatter-combine.ll
    M llvm/test/CodeGen/RISCV/rvv/setcc-fp-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/stepvector.ll
    M llvm/test/CodeGen/RISCV/srem-seteq-illegal-types.ll
    M llvm/test/CodeGen/RISCV/urem-vector-lkk.ll

  Log Message:
  -----------
  [RISCV] Strength reduce mul by 2^N - 2^M (#88983)

This is a three instruction expansion, and does not depend on zba, so
most of the test changes are in base RV32/64I configurations.

With zba, this gets immediates such as 14, 28, 30, 56, 60, 62.. which
aren't covered by our other expansions.



To unsubscribe from these emails, change your notification settings at https://github.com/llvm/llvm-project/settings/notifications