[all-commits] [llvm/llvm-project] 0d9c75: [AMDGPU] Reset VGPR MSBs at the end of fallthrough...

[Stanislav Mekhanoshin via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 0d9c75be2d5231ab5cbe2f3481863ec69cc534a1
      https://github.com/llvm/llvm-project/commit/0d9c75be2d5231ab5cbe2f3481863ec69cc534a1
  Author: Stanislav Mekhanoshin <Stanislav.Mekhanoshin at amd.com>
  Date:   2025-10-31 (Fri, 31 Oct 2025)

  Changed paths:
    M llvm/lib/Target/AMDGPU/AMDGPULowerVGPREncoding.cpp
    M llvm/test/CodeGen/AMDGPU/vgpr-lowering-gfx1250.mir

  Log Message:
  -----------
  [AMDGPU] Reset VGPR MSBs at the end of fallthrough basic block (#164901)

By convention a basic block shall start with MSBs zero. We also
need to know a previous mode in all cases as SWDEV-562450 asks
to record the old mode in the high bits of the mode.



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