[all-commits] [llvm/llvm-project] c12f04: [GlobalISel] Add new combine to convert scalar G_M...

[AE via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: c12f046eb96f8462b3fd3889344ba344de5ace1f
      https://github.com/llvm/llvm-project/commit/c12f046eb96f8462b3fd3889344ba344de5ace1f
  Author: Amara Emerson <aemerson at apple.com>
  Date:   2020-01-29 (Wed, 29 Jan 2020)

  Changed paths:
    M llvm/include/llvm/CodeGen/GlobalISel/CombinerHelper.h
    M llvm/include/llvm/Target/GlobalISel/Combine.td
    M llvm/lib/CodeGen/GlobalISel/CombinerHelper.cpp
    A llvm/test/CodeGen/AArch64/GlobalISel/combine-mul-to-shl.mir
    M llvm/test/CodeGen/AMDGPU/GlobalISel/lds-relocs.ll
    M llvm/test/CodeGen/AMDGPU/GlobalISel/llvm.amdgcn.atomic.dec.ll
    M llvm/test/CodeGen/AMDGPU/GlobalISel/llvm.amdgcn.atomic.inc.ll
    M llvm/test/CodeGen/AMDGPU/GlobalISel/llvm.amdgcn.is.private.ll
    M llvm/test/CodeGen/AMDGPU/GlobalISel/llvm.amdgcn.is.shared.ll
    M llvm/test/CodeGen/AMDGPU/GlobalISel/llvm.amdgcn.update.dpp.ll
    M llvm/test/CodeGen/AMDGPU/GlobalISel/mubuf-global.ll

  Log Message:
  -----------
  [GlobalISel] Add new combine to convert scalar G_MUL to G_SHL.

For pow2 constants we should use G_SHL for pattern matching (and perf)
purposes later.

Vector support not yet implemented.

Differential Revision: https://reviews.llvm.org/D73659