[polly] [Polly] Disable vectorization for Polly's fallback loops (PR #119188)

[Michael Kruse via llvm-commits]

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@@ -233,6 +234,15 @@ static bool generateCode(Scop &S, IslAstInfo &AI, LoopInfo &LI,
   NodeBuilder.allocateNewArrays(StartExitBlocks);
   Annotator.buildAliasScopes(S);
 
+  // The code below annotates the "llvm.loop.vectorize.enable" to false
+  // for the code flow taken when RTCs fail. Because we don't want the
+  // Loop Vectorizer to come in later and vectorize the original fall back
+  // loop when polly is enabled.
----------------
Meinersbur wrote:

```suggestion
  // loop when Polly is enabled.
```

https://github.com/llvm/llvm-project/pull/119188