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

[David Sherwood via llvm-commits]

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@@ -407,6 +407,13 @@ class LoopVectorizationLegality {
     return hasUncountableEarlyExit() ? getUncountableEdge()->second : nullptr;
   }
 
+  /// Returns true if this is an early exit loop containing a store.
+  bool isConditionCopyRequired() const { return RequiresEarlyExitConditionCopy; }
+
+  /// Returns the load instruction, if any, nearest to an uncountable early
+  /// exit.
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david-arm wrote:

Does `nearest` refer to nearest load prior to the early exit, after, or either?

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