[PATCH] [BasicBlockUtils] Set debug locations for instructions created in SplitBlockPredecessors.

[Alexey Samsonov]

In http://reviews.llvm.org/D10343#185735, @dblaikie wrote:

> Your test only tests 2 branch instructions, yet the code change touches 3 different sites - is one of those changes untested?


Right. Extended the test to cover all the cases.


http://reviews.llvm.org/D10343

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