[all-commits] [llvm/llvm-project] 4a7de3: [AMDGPU] Avoid use of V_READLANE into EXEC in SGPR...

[Carl Ritson via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 4a7de36afc785070d35a951dfa470d5e91acd540
      https://github.com/llvm/llvm-project/commit/4a7de36afc785070d35a951dfa470d5e91acd540
  Author: Carl Ritson <carl.ritson at amd.com>
  Date:   2020-06-20 (Sat, 20 Jun 2020)

  Changed paths:
    M llvm/lib/Target/AMDGPU/SIInstrInfo.cpp
    M llvm/lib/Target/AMDGPU/SIRegisterInfo.cpp
    A llvm/test/CodeGen/AMDGPU/fold-reload-into-exec.mir
    M llvm/test/CodeGen/AMDGPU/sgpr-spill.mir
    M llvm/test/CodeGen/AMDGPU/si-sgpr-spill.ll
    M llvm/test/CodeGen/AMDGPU/spill-special-sgpr.mir

  Log Message:
  -----------
  [AMDGPU] Avoid use of V_READLANE into EXEC in SGPR spills

Always prefer to clobber input SGPRs and restore them after the
spill.  This applies to both spills to VGPRs and scratch.

Reviewed By: arsenm

Differential Revision: https://reviews.llvm.org/D81914