[all-commits] [llvm/llvm-project] 1bbb9d: [GISel] Combine compare of bitfield extracts or'd ...

[Pierre van Houtryve via All-commits]

  Branch: refs/heads/users/pierre-vh/gisel-combine-workitem-intrinsics
  Home:   https://github.com/llvm/llvm-project
  Commit: 1bbb9d5f749cd99ebbd7e56b07cad96e8fa59210
      https://github.com/llvm/llvm-project/commit/1bbb9d5f749cd99ebbd7e56b07cad96e8fa59210
  Author: pvanhout <pierre.vanhoutryve at amd.com>
  Date:   2025-07-24 (Thu, 24 Jul 2025)

  Changed paths:
    M llvm/include/llvm/CodeGen/GlobalISel/CombinerHelper.h
    M llvm/include/llvm/Target/GlobalISel/Combine.td
    M llvm/lib/CodeGen/GlobalISel/CombinerHelperCompares.cpp
    A llvm/test/CodeGen/AMDGPU/GlobalISel/combine-cmp-merged-bfx.mir
    M llvm/test/CodeGen/AMDGPU/workitem-intrinsic-opts.ll

  Log Message:
  -----------
  [GISel] Combine compare of bitfield extracts or'd together.

Equivalent of the previous DAG patch for GISel.
The shifts are BFXs in GISel, so the canonical form of the entire expression
is different than in the DAG. The mask is not at the root of the expression, it
remains on the leaves instead.

See #136727



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