[llvm] [VPlan] Only use selectVectorizationFactor for cross-check (NFCI). (PR #103033)

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git-clang-format --diff f2fcd9cb97f76f34196233fc5c9170fb0905d844 7c5c96f806aaa2ab73aeebdbf1ed61a15b2f2e6e --extensions h,cpp -- llvm/lib/Transforms/Vectorize/LoopVectorizationPlanner.h llvm/lib/Transforms/Vectorize/LoopVectorize.cpp llvm/lib/Transforms/Vectorize/VPlan.cpp
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View the diff from clang-format here.
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``````````diff
diff --git a/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp b/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
index 809a9d21ce..0eca685dd0 100644
--- a/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
+++ b/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
@@ -7290,7 +7290,8 @@ VectorizationFactor LoopVectorizationPlanner::computeBestVF() {
   // cost-model and will be retired once the VPlan-based cost-model is
   // stabilized.
   VectorizationFactor LegacyVF = selectVectorizationFactor();
-  assert(BestFactor.Width == LegacyVF.Width && " VPlan cost model and legacy cost model disagreed");
+  assert(BestFactor.Width == LegacyVF.Width &&
+         " VPlan cost model and legacy cost model disagreed");
   assert((BestFactor.Width.isScalar() || BestFactor.ScalarCost > 0) &&
          "when vectorizing, the scalar cost must be non-zero.");
 #endif

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https://github.com/llvm/llvm-project/pull/103033