[all-commits] [llvm/llvm-project] f2c99e: AMDGPU: Use reserved VGPR for AGPR spills to memory

[Matt Arsenault via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: f2c99ea47da3ded530fa94fe96f486338fffc99c
      https://github.com/llvm/llvm-project/commit/f2c99ea47da3ded530fa94fe96f486338fffc99c
  Author: Matt Arsenault <Matthew.Arsenault at amd.com>
  Date:   2022-02-08 (Tue, 08 Feb 2022)

  Changed paths:
    M llvm/lib/Target/AMDGPU/SIRegisterInfo.cpp
    M llvm/test/CodeGen/AMDGPU/accvgpr-spill-scc-clobber.mir
    M llvm/test/CodeGen/AMDGPU/agpr-copy-no-free-registers.ll
    M llvm/test/CodeGen/AMDGPU/pei-build-av-spill.mir
    M llvm/test/CodeGen/AMDGPU/pei-build-spill.mir
    M llvm/test/CodeGen/AMDGPU/spill-agpr-partially-undef.mir
    M llvm/test/CodeGen/AMDGPU/spill-agpr.ll
    M llvm/test/CodeGen/AMDGPU/spill-agpr.mir

  Log Message:
  -----------
  AMDGPU: Use reserved VGPR for AGPR spills to memory

Previously would reuse the VGPR used for large frame offsets with the
one needed for copying from the AGPR. Fix this by reusing the register
we already reserved for handling AGPR to AGPR copies.