[all-commits] [llvm/llvm-project] 653bea: [AMDGPU][GISel] Add Identity BUILD_VECTOR Combines

[Pierre van Houtryve via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 653beae5a16816a6ef4b699803fd0fc54b8bbbb8
      https://github.com/llvm/llvm-project/commit/653beae5a16816a6ef4b699803fd0fc54b8bbbb8
  Author: Pierre van Houtryve <pierre.vanhoutryve at amd.com>
  Date:   2022-09-30 (Fri, 30 Sep 2022)

  Changed paths:
    M llvm/include/llvm/CodeGen/GlobalISel/CombinerHelper.h
    M llvm/include/llvm/CodeGen/GlobalISel/MIPatternMatch.h
    M llvm/include/llvm/Target/GlobalISel/Combine.td
    M llvm/lib/CodeGen/GlobalISel/CombinerHelper.cpp
    M llvm/test/CodeGen/AMDGPU/GlobalISel/combine-fma-add-ext-mul.ll
    M llvm/test/CodeGen/AMDGPU/GlobalISel/combine-fma-add-mul.ll
    M llvm/test/CodeGen/AMDGPU/GlobalISel/llvm.amdgcn.image.load.1d.d16.ll
    A llvm/test/CodeGen/AMDGPU/GlobalISel/postlegalizer-combiner-buildvector-identities.mir
    A llvm/test/CodeGen/AMDGPU/GlobalISel/postlegalizer-combiner-trunc-bitcast-buildvector.mir

  Log Message:
  -----------
  [AMDGPU][GISel] Add Identity BUILD_VECTOR Combines

Folds-away BUILD_VECTOR-related noops in the post-legalizer combiner.

Depends on D134433

Reviewed By: arsenm

Differential Revision: https://reviews.llvm.org/D134953