[all-commits] [llvm/llvm-project] 07869b: [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: 07869b22ba80f09475faf73b18eb49bdd03bc9b5
      https://github.com/llvm/llvm-project/commit/07869b22ba80f09475faf73b18eb49bdd03bc9b5
  Author: pvanhout <pierre.vanhoutryve at amd.com>
  Date:   2025-07-29 (Tue, 29 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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