[all-commits] [llvm/llvm-project] b9f3e1: AMDGPU: Delete redundant recursive copy handling code

[Matt Arsenault via All-commits]

  Branch: refs/heads/users/arsenm/amdgpu/remove-redundant-recursive-copy-folding-fold-imm-true16-regression
  Home:   https://github.com/llvm/llvm-project
  Commit: b9f3e1e7c82216ee6c173bda5514b63a3a89a9ad
      https://github.com/llvm/llvm-project/commit/b9f3e1e7c82216ee6c173bda5514b63a3a89a9ad
  Author: Matt Arsenault <Matthew.Arsenault at amd.com>
  Date:   2025-10-04 (Sat, 04 Oct 2025)

  Changed paths:
    M llvm/lib/Target/AMDGPU/SIFoldOperands.cpp
    M llvm/test/CodeGen/AMDGPU/llvm.is.fpclass.f16.ll
    M llvm/test/CodeGen/AMDGPU/true16-fold.mir
    A llvm/test/CodeGen/AMDGPU/true16-imm-folded-to-0-regression.ll

  Log Message:
  -----------
  AMDGPU: Delete redundant recursive copy handling code

This fixes a regression exposed after 445415219708f9539801018e03282049ca33e0e2.
This introduces a few small regressions for true16. There are more cases
where the value can propagate through subregister extracts which need
new handling. They're also small enough that perhaps there's a way to avoid
needing to deal with this case in the first place.



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