[llvm] [VPlan] Dispatch to multiple exit blocks via middle blocks. (PR #112138)

[David Sherwood via llvm-commits]

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@@ -9965,12 +10000,14 @@ bool LoopVectorizePass::processLoop(Loop *L) {
   }
 
   if (LVL.hasUncountableEarlyExit()) {
-    reportVectorizationFailure("Auto-vectorization of loops with uncountable "
-                               "early exit is not yet supported",
-                               "Auto-vectorization of loops with uncountable "
-                               "early exit is not yet supported",
-                               "UncountableEarlyExitLoopsUnsupported", ORE, L);
-    return false;
+    if (!EnableEarlyExitVectorization) {
+      reportVectorizationFailure("Auto-vectorization of loops with uncountable "
+                                 "early exit is not enabled",
+                                 "Auto-vectorization of loops with uncountable "
+                                 "early exit is no enabled",
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david-arm wrote:

nit: I think this should be `"early exit is not enabled"`

https://github.com/llvm/llvm-project/pull/112138