[PATCH] D137138: AMDGPU: Fix DivergenceAnalysis for llvm.read_register

[Matt Arsenault via Phabricator via llvm-commits]

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This was treating all calls as uniform by default, which
is wrong if used to read a VGPR.


https://reviews.llvm.org/D137138

Files:
  llvm/lib/Target/AMDGPU/AMDGPUTargetTransformInfo.cpp
  llvm/lib/Target/AMDGPU/AMDGPUTargetTransformInfo.h
  llvm/test/Analysis/DivergenceAnalysis/AMDGPU/read_register.ll

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