[all-commits] [llvm/llvm-project] 10b7cd: [RISCV] Select signed and unsigned bitfield extrac...

[Philipp Tomsich via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 10b7cd660c73f704ad8610828e80b33c241451df
      https://github.com/llvm/llvm-project/commit/10b7cd660c73f704ad8610828e80b33c241451df
  Author: Philipp Tomsich <philipp.tomsich at vrull.eu>
  Date:   2023-02-17 (Fri, 17 Feb 2023)

  Changed paths:
    M llvm/lib/Target/RISCV/RISCVISelDAGToDAG.cpp
    M llvm/lib/Target/RISCV/RISCVISelDAGToDAG.h
    M llvm/lib/Target/RISCV/RISCVInstrInfoXTHead.td
    M llvm/test/CodeGen/RISCV/bitextract-mac.ll
    M llvm/test/CodeGen/RISCV/rotl-rotr.ll
    M llvm/test/CodeGen/RISCV/rv32xtheadbb.ll
    M llvm/test/CodeGen/RISCV/rv64xtheadbb.ll

  Log Message:
  -----------
  [RISCV] Select signed and unsigned bitfield extracts for XTHeadBb

The XTHeadBb extension hab both signed and unsigned bitfield
extraction instructions (TH.EXT and TH.EXTU, respectively) which have
previously only been supported for sign extension on byte, halfword,
and word-boundaries.

This adds the infrastructure to use TH.EXT and TH.EXTU for arbitrary
bitfield extraction.

Reviewed By: craig.topper

Differential Revision: https://reviews.llvm.org/D144229