-/// SingleDominatingExit - Checks that there is only a single blocks that
-/// branches out of the loop, and that it also dominates the latch block. Loops
-/// with multiple or non-latch-dominating exiting blocks could be dead, but we'd
-/// have to do more extensive analysis to make sure, for instance, that the
-/// control flow logic involves was or could be made loop-invariant.
-bool LoopDeletion::SingleDominatingExit(Loop* L,
- SmallVector<BasicBlock*, 4>& exitingBlocks) {
-
- if (exitingBlocks.size() != 1)
- return false;
-
- BasicBlock* latch = L->getLoopLatch();
- if (!latch)
- return false;
-
- DominatorTree& DT = getAnalysis<DominatorTree>();
- if (DT.dominates(exitingBlocks[0], latch))
- return true;
- else
- return false;