[all-commits] [llvm/llvm-project] 97b34d: AMDGPU: Tablegenerate TargetParser feature sets (#...

[Matt Arsenault via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 97b34d6d63381bcd8bf36b6859bd2d9d0f5d1b76
      https://github.com/llvm/llvm-project/commit/97b34d6d63381bcd8bf36b6859bd2d9d0f5d1b76
  Author: Matt Arsenault <Matthew.Arsenault at amd.com>
  Date:   2026-08-03 (Mon, 03 Aug 2026)

  Changed paths:
    M llvm/lib/Target/AMDGPU/AMDGPU.td
    M llvm/lib/TargetParser/AMDGPUTargetParser.cpp
    M llvm/unittests/TargetParser/TargetParserTest.cpp
    M llvm/utils/TableGen/Basic/AMDGPUTargetDefEmitter.cpp

  Log Message:
  -----------
  AMDGPU: Tablegenerate TargetParser feature sets (#212945)

Traditionally we maintained 2 parallel feature mechanisms,
one in clang (later moved to TargetParser), with largely
mirrored subtarget features defined in the backend. Start
directly taking feature information from the backend and putting
it into TargetParser. This is still in a compromise mid-migration
state. We still have both the legacy "ArchAttr" bitfield integer,
plus a new AMDGPUFeatureBitset field stored in the table, which
isn't yet exported.

For the moment, the new bitset is only used to populate the
feature string name map, which is the big maintainability win.
This also lists an explicit subset of exported features to
avoid churn.

Co-authored-by: Claude (Claude-Opus-4.8)



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