[all-commits] [llvm/llvm-project] 1614c3: AMDGPU: Always use AV spill pseudos on targets wit...

[Matt Arsenault via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 1614c3b3c74b50dc6d5a7f359897bca221de931b
      https://github.com/llvm/llvm-project/commit/1614c3b3c74b50dc6d5a7f359897bca221de931b
  Author: Matt Arsenault <Matthew.Arsenault at amd.com>
  Date:   2025-07-18 (Fri, 18 Jul 2025)

  Changed paths:
    M llvm/lib/Target/AMDGPU/SIInstrInfo.cpp
    M llvm/lib/Target/AMDGPU/SIInstrInfo.h
    M llvm/test/CodeGen/AMDGPU/buffer-fat-pointers-memcpy.ll
    M llvm/test/CodeGen/AMDGPU/inflate-av-remat-imm.mir
    M llvm/test/CodeGen/AMDGPU/inflated-reg-class-snippet-copy-use-after-free.mir
    M llvm/test/CodeGen/AMDGPU/regalloc-undef-copy-fold.mir
    M llvm/test/CodeGen/AMDGPU/spill-agpr.mir
    M llvm/test/CodeGen/AMDGPU/swdev502267-use-after-free-last-chance-recoloring-alloc-succeeds.mir

  Log Message:
  -----------
  AMDGPU: Always use AV spill pseudos on targets with AGPRs (#149099)

This increases allocator freedom to inflate register classes
to the AV class, we don't need to introduce a new restriction
by basing the opcode on the current virtual register class.
Ideally we would avoid this if we don't have any allocatable
AGPRs for the function, but it probably doesn't make much
difference in the end result if they are excluded from the
final allocation order.



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