[all-commits] [llvm/llvm-project] a7ebc4: [DAGCombiner] Teach isKnownToBeAPowerOfTwo handle ...

[Jianjian Guan via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: a7ebc4d145892fd22442832549cb12c4b6920dea
      https://github.com/llvm/llvm-project/commit/a7ebc4d145892fd22442832549cb12c4b6920dea
  Author: jacquesguan <jacquesguan at me.com>
  Date:   2021-08-18 (Wed, 18 Aug 2021)

  Changed paths:
    M llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
    M llvm/test/CodeGen/RISCV/rvv/vdivu-sdnode-rv32.ll
    M llvm/test/CodeGen/RISCV/rvv/vdivu-sdnode-rv64.ll
    M llvm/test/CodeGen/RISCV/rvv/vmul-sdnode-rv32.ll
    M llvm/test/CodeGen/RISCV/rvv/vmul-sdnode-rv64.ll
    M llvm/test/CodeGen/RISCV/rvv/vremu-sdnode-rv32.ll
    M llvm/test/CodeGen/RISCV/rvv/vremu-sdnode-rv64.ll

  Log Message:
  -----------
  [DAGCombiner] Teach isKnownToBeAPowerOfTwo handle SPLAT_VECTOR

Make DAGCombine turn mul by power of 2 into shl for scalable vector.

Reviewed By: frasercrmck

Differential Revision: https://reviews.llvm.org/D107883