[all-commits] [llvm/llvm-project] 20a940: [AMDGPU][SIFrameLowering] Unify PEI SGPR spill sav...

[Christudasan Devadasan via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 20a940f1e217b0df031e656b2811be02b15eb14e
      https://github.com/llvm/llvm-project/commit/20a940f1e217b0df031e656b2811be02b15eb14e
  Author: Christudasan Devadasan <Christudasan.Devadasan at amd.com>
  Date:   2022-12-17 (Sat, 17 Dec 2022)

  Changed paths:
    M llvm/lib/Target/AMDGPU/SIFrameLowering.cpp
    M llvm/lib/Target/AMDGPU/SIFrameLowering.h
    M llvm/lib/Target/AMDGPU/SIMachineFunctionInfo.cpp
    M llvm/lib/Target/AMDGPU/SIMachineFunctionInfo.h
    M llvm/test/CodeGen/AMDGPU/stack-realign.ll

  Log Message:
  -----------
  [AMDGPU][SIFrameLowering] Unify PEI SGPR spill saves and restores

There is a lot of customization and eventually code duplication in the
frame lowering that handles special SGPR spills like the one needed for
the Frame Pointer. Incorporating any additional SGPR spill currently
makes it difficult during PEI. This patch introduces a new spill builder
to efficiently handle such spill requirements. Various spill methods are
special handled using a separate class.

Reviewed By: sebastian-ne, scott.linder

Differential Revision: https://reviews.llvm.org/D132436