[PATCH] EABI Divmod Legal

[Renato Golin]

  Adding return value logic to all relevant Libcall lowering (including SREM/UREM) so the changes to the rest of the code is minimal.

Hi t.p.northover, amaury.dlv, asl,

http://llvm-reviews.chandlerc.com/D1575

CHANGE SINCE LAST DIFF
  http://llvm-reviews.chandlerc.com/D1575?vs=4031&id=4097#toc

Files:
  include/llvm/Target/TargetLowering.h
  lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
  lib/CodeGen/SelectionDAG/LegalizeIntegerTypes.cpp
  lib/Target/ARM/ARMISelLowering.cpp
  lib/Target/ARM/ARMISelLowering.h
  test/CodeGen/ARM/divmod-eabi.ll
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