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

[Matthias Braun]

Is there a way to create a proper llvm-lit test for this? I assume relying on -debug-only=isel in the RUN line is not a good idea.
The test in http://reviews.llvm.org/D6940 works but it is more of an accident that aarch64 fails on non properly combined code...


http://reviews.llvm.org/D6946

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