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AI-generatedDoes LLVM's LoopVectorize pass re‑evaluate its cost model after profile‑guided optimization marks a function hot or cold?
LLVM’s LoopVectorize pass decides whether to vectorize a loop based on a cost model that evaluates trip count, memory stride, alignment, and target‑specific vector width. The model is consulted during the pass’s execution, which typically runs before profile‑guided optimization (PGO) marks functions as hot or cold. After PGO, the optimizer may reorder or re‑
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