[llvm] [LoopVectorize] Use new getUniqueLatchExitBlock routine (PR #108231)

[Florian Hahn via llvm-commits]

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@@ -159,6 +159,17 @@ BlockT *LoopBase<BlockT, LoopT>::getUniqueExitBlock() const {
   return getExitBlockHelper(this, true).first;
 }
 
+template <class BlockT, class LoopT>
+BlockT *LoopBase<BlockT, LoopT>::getUniqueLatchExitBlock() const {
+  BlockT *Latch = getLoopLatch();
+  assert(Latch && "Latch block must exists");
+  auto IsExitBlock = [&](BlockT *BB, bool AllowRepeats) -> BlockT * {
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fhahn wrote:

nit: sufficient to capture `this`?
```suggestion
  auto IsExitBlock = [this](BlockT *BB, bool AllowRepeats) -> BlockT * {
```



https://github.com/llvm/llvm-project/pull/108231