[llvm] [LV] Initial support for stores in early exit loops (PR #137774)

[David Sherwood via llvm-commits]

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@@ -1751,6 +1853,11 @@ bool LoopVectorizationLegality::isVectorizableEarlyExitLoop() {
                        "backedge taken count: "
                     << *SymbolicMaxBTC << '\n');
   UncountableEdge = SingleUncountableEdge;
+  if (HasStore) {
+    RequiresEarlyExitConditionCopy = true;
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david-arm wrote:

Looks like these are always set as a pair, so perhaps there is no need for `RequiresEarlyExitConditionCopy` and you can just test if `EarlyExitLoad` has a value or not?

https://github.com/llvm/llvm-project/pull/137774