[all-commits] [llvm/llvm-project] 9953d4: AMDGPU/GlobalISel: Regbanklegalize rules for G_UNM...

[Petar Avramovic via All-commits]

  Branch: refs/heads/users/petar-avramovic/unmerge-s16-v2
  Home:   https://github.com/llvm/llvm-project
  Commit: 9953d40e4e3afeaf0bb537479abe1e3bba7a6ae8
      https://github.com/llvm/llvm-project/commit/9953d40e4e3afeaf0bb537479abe1e3bba7a6ae8
  Author: Petar Avramovic <Petar.Avramovic at amd.com>
  Date:   2025-12-12 (Fri, 12 Dec 2025)

  Changed paths:
    M llvm/lib/Target/AMDGPU/AMDGPUGlobalISelUtils.cpp
    M llvm/lib/Target/AMDGPU/AMDGPUGlobalISelUtils.h
    M llvm/lib/Target/AMDGPU/AMDGPURegBankLegalize.cpp
    M llvm/lib/Target/AMDGPU/AMDGPURegBankLegalizeHelper.cpp
    M llvm/lib/Target/AMDGPU/AMDGPURegBankLegalizeRules.cpp
    M llvm/lib/Target/AMDGPU/AMDGPURegBankLegalizeRules.h
    M llvm/test/CodeGen/AMDGPU/GlobalISel/fpext.ll
    A llvm/test/CodeGen/AMDGPU/GlobalISel/unmerge-sgpr-s16.ll

  Log Message:
  -----------
  AMDGPU/GlobalISel: Regbanklegalize rules for G_UNMERGE_VALUES

Move G_UNMERGE_VALUES handling to AMDGPURegBankLegalizeRules.cpp.
Fix sgpr S16 unmerge by lowering using shift and using S32.
Previously sgpr S16 unmerge was selected using _lo16 and _hi16 subreg
indexes which are exclusive to vgpr register classes.
For remaing cases we do trivial mapping, assigns same reg bank
to all operands, vgpr or sgpr.



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