[PATCH] D29014: [SelDag] Implement FREEZE node

[Juneyoung Lee via Phabricator via llvm-commits]

aqjune created this revision.

- Add FREEZE node to SelDag
- Lower FreezeInst (in IR) to FREEZE node
- Add Legalization for FREEZE node
- Lower FREEZE(x) -> CopyToReg(reg, x) + CopyFromReg(reg)


https://reviews.llvm.org/D29014

Files:
  include/llvm/CodeGen/ISDOpcodes.h
  include/llvm/CodeGen/SelectionDAGISel.h
  lib/CodeGen/SelectionDAG/LegalizeIntegerTypes.cpp
  lib/CodeGen/SelectionDAG/LegalizeTypes.h
  lib/CodeGen/SelectionDAG/LegalizeTypesGeneric.cpp
  lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
  lib/CodeGen/SelectionDAG/SelectionDAGDumper.cpp
  lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
  lib/CodeGen/TargetLoweringBase.cpp
  test/CodeGen/X86/freeze-legalize.ll
  test/CodeGen/X86/freeze.ll

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