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2018 Jun 01
2
[VPlan] about vectorization factor selection
Hi, Current loop vectorizer uses a range of vectorization factors computed by MaxVF. For each VF, it setups unform and scalar info before building VPlan and the final best VF selection. The best VF is also selected within the VF range. for (unsigned VF = 1; VF <= MaxVF; VF *= 2) { // Collect Uniform and Scalar instructions after vectorization with VF.