From 1145b13f2b9bb78b71632644bb7e6bf26aeb5e06 Mon Sep 17 00:00:00 2001 From: Kazu Hirata Date: Wed, 19 Mar 2025 08:09:07 -0700 Subject: [PATCH] [Transforms] Avoid repeated hash lookups (NFC) --- llvm/lib/Transforms/Vectorize/LoopVectorize.cpp | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp b/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp index 584da9b7baef5..8c40c3753a79a 100644 --- a/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp +++ b/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp @@ -4392,13 +4392,15 @@ void LoopVectorizationPlanner::emitInvalidCostRemarks( DenseMap Numbering; unsigned I = 0; for (auto &Pair : InvalidCosts) - if (!Numbering.count(Pair.first)) - Numbering[Pair.first] = I++; + if (Numbering.try_emplace(Pair.first, I).second) + ++I; // Sort the list, first on recipe(number) then on VF. sort(InvalidCosts, [&Numbering](RecipeVFPair &A, RecipeVFPair &B) { - if (Numbering[A.first] != Numbering[B.first]) - return Numbering[A.first] < Numbering[B.first]; + unsigned NA = Numbering[A.first]; + unsigned NB = Numbering[B.first]; + if (NA != NB) + return NA < NB; return ElementCount::isKnownLT(A.second, B.second); });