[all-commits] [llvm/llvm-project] f6dd32: [SVE][CodeGen] Lower scalable masked gathers

[kmclaughlin-arm via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: f6dd32fd3584380730a09b042cfbac852f36eb00
      https://github.com/llvm/llvm-project/commit/f6dd32fd3584380730a09b042cfbac852f36eb00
  Author: Kerry McLaughlin <kerry.mclaughlin at arm.com>
  Date:   2020-12-07 (Mon, 07 Dec 2020)

  Changed paths:
    M llvm/lib/CodeGen/SelectionDAG/LegalizeVectorTypes.cpp
    M llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
    M llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
    M llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
    M llvm/lib/Target/AArch64/AArch64ISelLowering.h
    A llvm/test/CodeGen/AArch64/sve-masked-gather-32b-signed-scaled.ll
    A llvm/test/CodeGen/AArch64/sve-masked-gather-32b-signed-unscaled.ll
    A llvm/test/CodeGen/AArch64/sve-masked-gather-32b-unsigned-scaled.ll
    A llvm/test/CodeGen/AArch64/sve-masked-gather-32b-unsigned-unscaled.ll
    A llvm/test/CodeGen/AArch64/sve-masked-gather-64b-scaled.ll
    A llvm/test/CodeGen/AArch64/sve-masked-gather-64b-unscaled.ll
    A llvm/test/CodeGen/AArch64/sve-masked-gather-legalize.ll

  Log Message:
  -----------
  [SVE][CodeGen] Lower scalable masked gathers

Lowers the llvm.masked.gather intrinsics (scalar plus vector addressing mode only)

Changes in this patch:
- Add custom lowering for MGATHER, using getGatherVecOpcode() to choose the appropriate
  gather load opcode to use.
- Improve codegen with refineIndexType/refineUniformBase, added in D90942
- Tests added for gather loads with 32 & 64-bit scaled & unscaled offsets.

Reviewed By: sdesmalen

Differential Revision: https://reviews.llvm.org/D91092