[PATCH] D138991: [AAPointerInfo] handle multiple offsets in PHI

[Sameer Sahasrabuddhe via Phabricator via llvm-commits]

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The arguments to a PHI may represent a recurrence by eventually using the output
of the PHI itself. This is now handled by checking for cycles in the control
flow. If a PHI is not in a recurrence, it is now able to report multiple offsets
instead of conservatively reporting unknown.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D138991

Files:
  llvm/include/llvm/Analysis/CycleAnalysis.h
  llvm/include/llvm/Transforms/IPO/Attributor.h
  llvm/lib/Target/AMDGPU/AMDGPUAttributor.cpp
  llvm/lib/Transforms/IPO/AttributorAttributes.cpp
  llvm/test/CodeGen/AMDGPU/implicitarg-attributes.ll
  llvm/test/CodeGen/AMDGPU/llc-pipeline.ll
  llvm/test/Transforms/Attributor/value-simplify-pointer-info.ll

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