[PATCH] D156669: AMDGPU: Handle llvm.stacksave and llvm.stackrestore

[Matt Arsenault via Phabricator via llvm-commits]

arsenm created this revision.
arsenm added reviewers: AMDGPU, Pierre-vh, foad, rampitec, JonChesterfield, doru1004.
Herald added subscribers: StephenFan, kerbowa, hiraditya, tpr, dstuttard, yaxunl, jvesely, kzhuravl.
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arsenm requested review of this revision.
Herald added a subscriber: wdng.
Herald added a project: LLVM.

Not sure if the only valid use is to have stackrestore directly
consume stacksave outputs or not. Handled exactly like a regular stack
pointer so all the edge cases theoretically should work.


https://reviews.llvm.org/D156669

Files:
  llvm/lib/Target/AMDGPU/AMDGPUISelDAGToDAG.cpp
  llvm/lib/Target/AMDGPU/AMDGPUISelDAGToDAG.h
  llvm/lib/Target/AMDGPU/AMDGPUISelLowering.cpp
  llvm/lib/Target/AMDGPU/AMDGPUISelLowering.h
  llvm/lib/Target/AMDGPU/SIISelLowering.cpp
  llvm/lib/Target/AMDGPU/SIISelLowering.h
  llvm/test/CodeGen/AMDGPU/stacksave_stackrestore.invalid.ll
  llvm/test/CodeGen/AMDGPU/stacksave_stackrestore.ll

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