[PATCH] D143707: [AMDGPU] Allow architected SGPRs for workgroup IDs

[Christudasan Devadasan via Phabricator via llvm-commits]

cdevadas added inline comments.


================
Comment at: llvm/lib/Target/AMDGPU/SIMachineFunctionInfo.h:707
+    Register Reg = HasArchitectedSGPRs ? AMDGPU::TTMP7 : getNextSystemSGPR();
+    unsigned Mask = HasArchitectedSGPRs && hasWorkGroupIDZ() ? 0xffff : ~0u;
+    ArgInfo.WorkGroupIDY = ArgDescriptor::createRegister(Reg, Mask);
----------------
The hasWorkGroupIDZ() will be set to 1 if there is a workgroup IDZ used. Otherwise, this function would return false.
The WorkGroupIDX, WorkGroupIDY, and WorkGroupIDZ fields in the MachineFunctionInfo would have set/reset it by now.



Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D143707/new/

https://reviews.llvm.org/D143707