[all-commits] [llvm/llvm-project] 485dd0: [GlobalISel] Handle constant splat in funnel shift...

[Abinav Puthan Purayil via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 485dd0b752cd78c93b1c41e922a73c07b565a9f0
      https://github.com/llvm/llvm-project/commit/485dd0b752cd78c93b1c41e922a73c07b565a9f0
  Author: Abinav Puthan Purayil <abinavpp at gmail.com>
  Date:   2022-05-16 (Mon, 16 May 2022)

  Changed paths:
    M llvm/include/llvm/CodeGen/GlobalISel/MIPatternMatch.h
    M llvm/include/llvm/CodeGen/GlobalISel/Utils.h
    M llvm/lib/CodeGen/GlobalISel/CombinerHelper.cpp
    M llvm/lib/CodeGen/GlobalISel/Utils.cpp
    M llvm/test/CodeGen/AMDGPU/GlobalISel/combine-fsh.mir
    M llvm/test/CodeGen/AMDGPU/GlobalISel/combine-rot.mir
    M llvm/unittests/CodeGen/GlobalISel/PatternMatchTest.cpp

  Log Message:
  -----------
  [GlobalISel] Handle constant splat in funnel shift combine

This change adds the constant splat versions of m_ICst() (by using
getBuildVectorConstantSplat()) and uses it in
matchOrShiftToFunnelShift(). The getBuildVectorConstantSplat() name is
shortened to getIConstantSplatVal() so that the *SExtVal() version would
have a more compact name.

Differential Revision: https://reviews.llvm.org/D125516