[PATCH] D47559: [SelectionDAG] Expand UADDO/USUBO into ADD/SUBCARRY if legal for target

[Krzysztof Parzyszek via Phabricator via llvm-commits]

kparzysz created this revision.
kparzysz added a reviewer: efriedma.

Additionally, this implements handling of ADD/SUBCARRY on Hexagon, utilizing the UADDO/USUBO expansion.


Repository:
  rL LLVM

https://reviews.llvm.org/D47559

Files:
  lib/CodeGen/SelectionDAG/DAGCombiner.cpp
  lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
  lib/Target/Hexagon/HexagonISelDAGToDAG.cpp
  lib/Target/Hexagon/HexagonISelDAGToDAG.h
  lib/Target/Hexagon/HexagonISelLowering.cpp
  test/CodeGen/Hexagon/adde.ll
  test/CodeGen/Hexagon/sube.ll

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