[PATCH] D32569: [SelectionDAG] Use KnownBits struct in DAG's computeKnownBits and simplifyDemandedBits

[Craig Topper via Phabricator via llvm-commits]

craig.topper created this revision.
Herald added subscribers: nhaehnle, nemanjai, jyknight, arsenm.
Herald added a reviewer: javed.absar.

This patch replaces the separate APInts for KnownZero/KnownOne with a single KnownBits struct. This is similar to what was done to ValueTracking's version earlier today.

This should be a largely mechanical transformation from KnownZero to Known.Zero.

There are a few several places where I replaced

  KnownZero = KnownOne = APInt(KnownZero.getBitWidth(), 0)

with

  Known.Zero.clearAllBits(); Known.One.clearAllBits();

since the width was already dependent on KnownZero.


https://reviews.llvm.org/D32569

Files:
  include/llvm/CodeGen/FunctionLoweringInfo.h
  include/llvm/CodeGen/SelectionDAG.h
  include/llvm/Target/TargetLowering.h
  lib/CodeGen/SelectionDAG/DAGCombiner.cpp
  lib/CodeGen/SelectionDAG/FunctionLoweringInfo.cpp
  lib/CodeGen/SelectionDAG/LegalizeIntegerTypes.cpp
  lib/CodeGen/SelectionDAG/SelectionDAG.cpp
  lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
  lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
  lib/CodeGen/SelectionDAG/TargetLowering.cpp
  lib/Target/AArch64/AArch64ISelDAGToDAG.cpp
  lib/Target/AArch64/AArch64ISelLowering.cpp
  lib/Target/AArch64/AArch64ISelLowering.h
  lib/Target/AMDGPU/AMDGPUISelLowering.cpp
  lib/Target/AMDGPU/AMDGPUISelLowering.h
  lib/Target/AMDGPU/SIISelLowering.cpp
  lib/Target/ARM/ARMISelLowering.cpp
  lib/Target/ARM/ARMISelLowering.h
  lib/Target/PowerPC/PPCISelDAGToDAG.cpp
  lib/Target/PowerPC/PPCISelLowering.cpp
  lib/Target/PowerPC/PPCISelLowering.h
  lib/Target/Sparc/SparcISelLowering.cpp
  lib/Target/Sparc/SparcISelLowering.h
  lib/Target/SystemZ/SystemZISelDAGToDAG.cpp
  lib/Target/SystemZ/SystemZISelLowering.cpp
  lib/Target/X86/X86ISelDAGToDAG.cpp
  lib/Target/X86/X86ISelLowering.cpp
  lib/Target/X86/X86ISelLowering.h
  lib/Target/X86/X86InstrCompiler.td
  lib/Target/XCore/XCoreISelLowering.cpp
  lib/Target/XCore/XCoreISelLowering.h

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