[PATCH] D99429: [AMDGPU] Save WWM registers in functions

Sebastian Neubauer via Phabricator via llvm-commits llvm-commits at lists.llvm.org
Fri Mar 26 10:49:55 PDT 2021


sebastian-ne created this revision.
sebastian-ne added reviewers: arsenm, madhur13490.
Herald added subscribers: kerbowa, hiraditya, t-tye, tpr, dstuttard, yaxunl, nhaehnle, jvesely, kzhuravl, qcolombet.
sebastian-ne requested review of this revision.
Herald added subscribers: llvm-commits, wdng.
Herald added a project: LLVM.

The values of registers in inactive lanes needs to be saved during
function calls.

Save all registers used for whole wave mode, similar to how it is done
for VGPRs that are used for SGPR spilling.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D99429

Files:
  llvm/lib/Target/AMDGPU/SIFrameLowering.cpp
  llvm/lib/Target/AMDGPU/SIMachineFunctionInfo.h
  llvm/lib/Target/AMDGPU/SIPreAllocateWWMRegs.cpp
  llvm/lib/Target/AMDGPU/SIRegisterInfo.cpp
  llvm/test/CodeGen/AMDGPU/wwm-reserved-spill.ll

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