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

[David Sherwood via llvm-commits]

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@@ -1823,6 +1930,8 @@ bool LoopVectorizationLegality::canVectorize(bool UseVPlanNativePath) {
     } else {
       if (!isVectorizableEarlyExitLoop()) {
         UncountableEdge = std::nullopt;
+        EarlyExitLoad = std::nullopt;
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david-arm wrote:

Feels like a good time to add a helper function to reset these variables perhaps?

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