Michael Gottesman 2f1ebf3c51 [pred-memopt] Provide normal succ manipulation methods on TermInst instead of SILBasicBlock. ...

I am doing this for a few different reasons:

1. The code for manipulating successors was partially in TermInst (with
SILBasicBlock delegating to TermInst) and partly in SILBasicBlock itself. It
makes more sense to just be consistent and move all said functionality into
TermInst and just always delegate to SILBasicBlock.

2. I am preparing an API around gathering all critical edges. All of the
critical edge breaking APIs to take a TermInst. I wanted to use some of the
successor APIs, only to discover that we were not delegating to TermInst.  By
moving said functionality onto TermInst itself and delegating, we have it in
both places.

rdar://31521023

2017-11-11 11:27:42 -08:00

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