[llvm] [LV] Replace UncountableEdge with UncountableEarlyExitingBlock (NFC). (PR #151311)

[David Sherwood via llvm-commits]

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@@ -1665,7 +1665,7 @@ bool LoopVectorizationLegality::isVectorizableEarlyExitLoop() {
 
   // Keep a record of all the exiting blocks.
   SmallVector<const SCEVPredicate *, 4> Predicates;
-  std::optional<std::pair<BasicBlock *, BasicBlock *>> SingleUncountableEdge;
+  BasicBlock *SingleUncountableExitingBlock;
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david-arm wrote:

Could the build issue be due to this uninitialised variable?

https://github.com/llvm/llvm-project/pull/151311