/// implemented for a target). Upon success, this returns false and returns
/// with the following information in various cases:
///
- /// 1. If this block ends with only an unconditional branch, it sets TBB to be
+ /// 1. If this block ends with no branches (it just falls through to its succ)
+ /// just return false, leaving TBB/FBB null.
+ /// 2. If this block ends with only an unconditional branch, it sets TBB to be
/// the destination block.
- /// 2. If this block ends with an conditional branch, it returns the 'true'
+ /// 3. If this block ends with an conditional branch, it returns the 'true'
/// destination in TBB, the 'false' destination in FBB, and a list of
/// operands that evaluate the condition. These operands can be passed to
/// other TargetInstrInfo methods to create new branches.