Quentin Colombet 23341a84ca [MachineBasicBlock] Make the pass argument truly mandatory when ...

splitting edges.

MachineBasicBlock::SplitCriticalEdges will crash if a nullptr would have
been passed for the Pass argument. Do not allow that by turning this
argument into a reference.
The alternative would have been to make the Pass a truly optional
argument, but although this is easy to do, I was afraid users using it
like this would not be aware the livness information, dominator tree and
such would silently be broken.

llvm-svn: 267052

2016-04-21 21:01:13 +00:00

45 KiB

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