[PATCH] DAGCombiner: Continue combining if FoldConstantArithmetic() fails.

[Matthias Braun]

New revision adapted to ToT and with many explicite isOpaque() checks avoided by introducing a cast operation that returns nullptr if a node is a non-opaque constant.


REPOSITORY
  rL LLVM

http://reviews.llvm.org/D6946

Files:
  lib/CodeGen/SelectionDAG/DAGCombiner.cpp
  lib/CodeGen/SelectionDAG/TargetLowering.cpp

EMAIL PREFERENCES
  http://reviews.llvm.org/settings/panel/emailpreferences/
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