[all-commits] [llvm/llvm-project] d8ba62: [AArch64][GlobalISel] Selection support for vector...

[AE via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: d8ba6222097a585bd22e93b2dd343226ae2b9867
      https://github.com/llvm/llvm-project/commit/d8ba6222097a585bd22e93b2dd343226ae2b9867
  Author: Amara Emerson <amara at apple.com>
  Date:   2020-07-29 (Wed, 29 Jul 2020)

  Changed paths:
    M llvm/include/llvm/CodeGen/GlobalISel/Utils.h
    M llvm/lib/CodeGen/GlobalISel/Utils.cpp
    M llvm/lib/Target/AArch64/GISel/AArch64InstructionSelector.cpp
    M llvm/lib/Target/AArch64/GISel/AArch64PostLegalizerCombiner.cpp
    A llvm/test/CodeGen/AArch64/GlobalISel/select-shuffle-to-duplane.mir
    M llvm/test/CodeGen/AArch64/GlobalISel/select-shuffle-vector.mir

  Log Message:
  -----------
  [AArch64][GlobalISel] Selection support for vector DUP[X]lane instructions.

In future, we'd like to use the perfect-shuffle mechanism to deal with these
shuffle permutations. For now, this improves performance by avoiding the
super-expensive const-pool load + tbl instruction.

Differential Revision: https://reviews.llvm.org/D84866