[PATCH] D53846: Check shouldReduceLoadWidth from SimplifySetCC

[Stanislav Mekhanoshin via Phabricator via llvm-commits]

rampitec created this revision.
rampitec added a reviewer: arsenm.
Herald added subscribers: tpr, nhaehnle, wdng, jvesely.

SimplifySetCC could shrink a load without checking for
profitability or legality of such shink with a target.

Added checks to prevent shrinking of aligned scalar loads
in AMDGPU below dword as scalar engine does not support it.


https://reviews.llvm.org/D53846

Files:
  lib/CodeGen/SelectionDAG/TargetLowering.cpp
  lib/Target/AMDGPU/AMDGPUISelLowering.cpp
  test/CodeGen/AMDGPU/setcc-limit-load-shrink.ll

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