[all-commits] [llvm/llvm-project] 45ef27: [AMDGPU] Handle True16 high-half 16-bit packing id...

[Zach Goldthorpe via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 45ef27a69895fcb756fec0d7a16d39706e5d9c06
      https://github.com/llvm/llvm-project/commit/45ef27a69895fcb756fec0d7a16d39706e5d9c06
  Author: Zach Goldthorpe <Zach.Goldthorpe at amd.com>
  Date:   2026-07-29 (Wed, 29 Jul 2026)

  Changed paths:
    M llvm/lib/Target/AMDGPU/SIInstructions.td
    M llvm/test/CodeGen/AMDGPU/pack-half-to-lshl-or.ll

  Log Message:
  -----------
  [AMDGPU] Handle True16 high-half 16-bit packing idiom with uniform operand (#211102)

With True16 instructions, the high-half packing idiom from #206058 tries
to `OR` a 16-bit VGPR operand into the high half of the other operand,
but this causes a crash if the other operand is uniform, as this
generates an invalid `$sgpr = COPY $sgpr_hi16`.



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