[all-commits] [llvm/llvm-project] 875694: [RISCV] Peephole optimization to fold merge.vvm an...

[Yeting Kuo via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 875694089d1f54fff41f05158733d51261b7e64c
      https://github.com/llvm/llvm-project/commit/875694089d1f54fff41f05158733d51261b7e64c
  Author: Yeting Kuo <yeting.kuo at sifive.com>
  Date:   2022-08-11 (Thu, 11 Aug 2022)

  Changed paths:
    M llvm/lib/Target/RISCV/RISCVISelDAGToDAG.cpp
    M llvm/lib/Target/RISCV/RISCVISelDAGToDAG.h
    M llvm/lib/Target/RISCV/RISCVInstrInfoVPseudos.td
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-peephole-vmerge-vops.ll
    M llvm/test/CodeGen/RISCV/rvv/rvv-peephole-vmerge-vops.ll

  Log Message:
  -----------
  [RISCV] Peephole optimization to fold merge.vvm and unmasked intrinsics.

The patch uses peephole method to fold merge.vvm and unmasked intrinsics to
masked intrinsics. Using peephole intead of tablegen patterns is to avoid large
auto gnerated code.

Note: The patch ignores segment loads since I don't know how to test them.

Reviewed By: craig.topper

Differential Revision: https://reviews.llvm.org/D130442