[all-commits] [llvm/llvm-project] 1f7c17: [RISCV] Expand rotate by non-constant for XTHeadBb...

[Craig Topper via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 1f7c1741d6e294fcce754a22ad96a6352f3e1f21
      https://github.com/llvm/llvm-project/commit/1f7c1741d6e294fcce754a22ad96a6352f3e1f21
  Author: Craig Topper <craig.topper at sifive.com>
  Date:   2023-05-23 (Tue, 23 May 2023)

  Changed paths:
    M llvm/lib/Target/RISCV/RISCVISelLowering.cpp
    M llvm/lib/Target/RISCV/RISCVInstrInfoXTHead.td
    M llvm/test/CodeGen/RISCV/rotl-rotr.ll

  Log Message:
  -----------
  [RISCV] Expand rotate by non-constant for XTHeadBb during lowering.

Avoids multi instruction isel patterns and enables mask optimizations
on shift amount.

Reviewed By: philipp.tomsich

Differential Revision: https://reviews.llvm.org/D151263