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[LV] Remove obsolete comment about creating a dummy block (NFC) 

No dummy pre-entry block is created since a6c4969f5f. The comment is
stale now and can be removed.

Mentioned by @Ayal in D113182.
This commit is contained in:
Florian Hahn 2021-11-19 17:17:03 +00:00
parent f849640a0c
commit 76effb001d
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llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
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@ -9336,7 +9336,6 @@ VPlanPtr LoopVectorizationPlanner::buildVPlanWithVPRecipes(
// visit each basic block after having visited its predecessor basic blocks.
// ---------------------------------------------------------------------------
// Create a dummy pre-entry VPBasicBlock to start building the VPlan.
auto Plan = std::make_unique<VPlan>();
// Scan the body of the loop in a topological order to visit each basic block