[PATCH] D80564: AMDGPU: Fix wrong null value for private address space

[Matt Arsenault via Phabricator via llvm-commits]

arsenm created this revision.
arsenm added reviewers: rampitec, yaxunl.
Herald added subscribers: kerbowa, hiraditya, t-tye, tpr, dstuttard, nhaehnle, wdng, jvesely, kzhuravl.
Herald added a project: LLVM.

I'm guessing this was a holdover from when 0 was an invalid stack
pointer, but surprised nobody has discovered this before.

      

Also don't allow offset folding for -1 pointers, since it looks weird
to partially fold this.


https://reviews.llvm.org/D80564

Files:
  llvm/lib/Target/AMDGPU/AMDGPUISelDAGToDAG.cpp
  llvm/lib/Target/AMDGPU/AMDGPUInstructionSelector.cpp
  llvm/lib/Target/AMDGPU/AMDGPUTargetMachine.h
  llvm/test/CodeGen/AMDGPU/GlobalISel/inst-select-load-private.mir
  llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-addrspacecast.mir
  llvm/test/CodeGen/AMDGPU/addrspacecast.ll
  llvm/test/CodeGen/AMDGPU/nullptr.ll

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