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This patch introduces the initial implementation for annotating loops created by Polly. Polly generates RunTimeChecks (RTCs), which result in loop versioning. Specifically, the loop created by Polly is executed when the RTCs pass, otherwise, the original loop is executed. This patch adds the "llvm.loop.vectorize.enable" metadata, setting it to true for loops created by Polly. Disabling vectorization for the original fallback loop is already merged in #119188. This behavior is controlled by the 'polly-annotate-metadata-vectorize' flag, and the annotations are applied only when this flag is enabled. This flag is set to false by default. NOTE: This commit is initial patch in effort to make polly interact with Loop Vectorizer via metadata. --------- Co-authored-by: Michael Kruse <github@meinersbur.de>
place tests here