[all-commits] [llvm/llvm-project] 71ed4b: [RISCV] Legalize select when Zbt extension available

[Michael Munday via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 71ed4b6ce57d8843ef705af8f98305976a8f107a
      https://github.com/llvm/llvm-project/commit/71ed4b6ce57d8843ef705af8f98305976a8f107a
  Author: Michael Munday <mike.munday at lowrisc.org>
  Date:   2021-01-12 (Tue, 12 Jan 2021)

  Changed paths:
    M llvm/lib/Target/RISCV/RISCVISelLowering.cpp
    M llvm/lib/Target/RISCV/RISCVInstrInfoB.td
    M llvm/test/CodeGen/RISCV/rv32Zbb.ll
    M llvm/test/CodeGen/RISCV/rv32Zbbp.ll
    M llvm/test/CodeGen/RISCV/rv32Zbs.ll
    M llvm/test/CodeGen/RISCV/rv32Zbt.ll
    M llvm/test/CodeGen/RISCV/rv64Zbt.ll

  Log Message:
  -----------
  [RISCV] Legalize select when Zbt extension available

The custom expansion of select operations in the RISC-V backend
interferes with the matching of cmov instructions. Legalizing
select when the Zbt extension is available solves that problem.

Reviewed By: lenary, craig.topper

Differential Revision: https://reviews.llvm.org/D93767