[PATCH] Fix a mergefunc crash caused by bitcasting intrinsics

[Stepan Dyatkovskiy]

Yes, it would be good if you increase test size. So we could be sure it will run whole the comparison routines.

> > It doesn't return true.
> But then, how FunctionComparator::enumerate could return "true" in this case?
Sorry, for that question, but it looks like crash happens somewhere inside getBitcast, right?

http://reviews.llvm.org/D3437

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