[PATCH] D111637: [AMDGPU] Changes the AMDGPU_Gfx calling convention by making the SGPRs 4..29 callee-save. This is to avoid superfluous s_movs when executing amdgpu_gfx function calls as the callee is likely not going to change the argument values.

[Thomas Symalla via Phabricator via llvm-commits]

tsymalla updated this revision to Diff 381889.
tsymalla added a comment.

Rebased the patch on a commit with tests generated by a recent version of the Python test script to make some diffs easier to read.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D111637/new/

https://reviews.llvm.org/D111637

Files:
  llvm/lib/Target/AMDGPU/AMDGPUCallLowering.cpp
  llvm/lib/Target/AMDGPU/AMDGPUCallingConv.td
  llvm/lib/Target/AMDGPU/AMDGPUISelLowering.h
  llvm/lib/Target/AMDGPU/AMDGPUInstrInfo.td
  llvm/lib/Target/AMDGPU/AMDGPUMCInstLower.cpp
  llvm/lib/Target/AMDGPU/SIISelLowering.cpp
  llvm/lib/Target/AMDGPU/SIInsertWaitcnts.cpp
  llvm/lib/Target/AMDGPU/SIRegisterInfo.cpp
  llvm/lib/Target/AMDGPU/SIRegisterInfo.td
  llvm/lib/Target/AMDGPU/SOPInstructions.td
  llvm/test/CodeGen/AMDGPU/GlobalISel/irtranslator-call-non-fixed.ll
  llvm/test/CodeGen/AMDGPU/GlobalISel/irtranslator-call-return-values.ll
  llvm/test/CodeGen/AMDGPU/GlobalISel/irtranslator-call.ll
  llvm/test/CodeGen/AMDGPU/GlobalISel/irtranslator-indirect-call.ll
  llvm/test/CodeGen/AMDGPU/amdpal-callable.ll
  llvm/test/CodeGen/AMDGPU/gfx-callable-argument-types.ll
  llvm/test/CodeGen/AMDGPU/gfx-callable-preserved-registers.ll
  llvm/test/CodeGen/AMDGPU/gfx-callable-return-types.ll
  llvm/test/CodeGen/AMDGPU/indirect-call.ll
  llvm/test/CodeGen/AMDGPU/inline-asm.i128.ll
  llvm/test/CodeGen/AMDGPU/pal-simple-indirect-call.ll
  llvm/test/CodeGen/AMDGPU/tail-call-amdgpu-gfx.ll
  llvm/test/CodeGen/AMDGPU/vgpr-liverange-ir.ll
  llvm/test/CodeGen/AMDGPU/vgpr-liverange.ll
  llvm/test/CodeGen/AMDGPU/wwm-reserved-spill.ll