[all-commits] [llvm/llvm-project] d97992: [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: d97992ef24abae69878fd1e49270bf0f7372ca39
      https://github.com/llvm/llvm-project/commit/d97992ef24abae69878fd1e49270bf0f7372ca39
  Author: pvanhout <pierre.vanhoutryve at amd.com>
  Date:   2025-06-30 (Mon, 30 Jun 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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