[PATCH] Fix a mergefunc crash caused by bitcasting intrinsics

[Stepan Dyatkovskiy]

Hi Bjorn,
We have replaced "enumerate" method with "cmpValues" + "cmpConstants". That was made as part of bigger improvement.
Now getBitcast is not called. But your test is really usefull.
So I would like to ask you try your test with trunk llvm version. I think it should work now. If so, I try to organize commit for you today.

P.S.: Do you have write access?

http://reviews.llvm.org/D3437