[all-commits] [llvm/llvm-project] acabba: [NVPTX] don't erase CopyToRegs when folding movs i...

[Princeton Ferro via All-commits]

  Branch: refs/heads/release/21.x
  Home:   https://github.com/llvm/llvm-project
  Commit: acabba4f6d30d077a0ca87dc95e25780c2b0825f
      https://github.com/llvm/llvm-project/commit/acabba4f6d30d077a0ca87dc95e25780c2b0825f
  Author: Princeton Ferro <pferro at nvidia.com>
  Date:   2025-09-03 (Wed, 03 Sep 2025)

  Changed paths:
    M llvm/lib/Target/NVPTX/NVPTXISelLowering.cpp
    M llvm/test/CodeGen/NVPTX/f16x2-instructions.ll
    M llvm/test/CodeGen/NVPTX/f32x2-instructions.ll
    M llvm/test/CodeGen/NVPTX/i16x2-instructions.ll
    M llvm/test/CodeGen/NVPTX/i8x4-instructions.ll
    A llvm/test/CodeGen/NVPTX/pr126337.ll
    M llvm/test/CodeGen/NVPTX/reduction-intrinsics.ll

  Log Message:
  -----------
  [NVPTX] don't erase CopyToRegs when folding movs into loads (#149393)

We may still need to keep CopyToReg even after folding uses into vector
loads, since the original register may be used in other blocks.

Partially reverts 1fdbe6984976d9e85ab3b1a93e8de434a85c5646



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