From 5f99ba035f87dff7f6ab017e4ba129ffbccdd9aa Mon Sep 17 00:00:00 2001 From: Kazu Hirata Date: Wed, 5 Mar 2025 09:03:02 -0800 Subject: [PATCH] [Utils] Avoid repeated hash lookups (NFC) --- llvm/lib/Transforms/Utils/SimplifyCFG.cpp | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/llvm/lib/Transforms/Utils/SimplifyCFG.cpp b/llvm/lib/Transforms/Utils/SimplifyCFG.cpp index c71605c500686..eb03689f31949 100644 --- a/llvm/lib/Transforms/Utils/SimplifyCFG.cpp +++ b/llvm/lib/Transforms/Utils/SimplifyCFG.cpp @@ -5833,9 +5833,10 @@ static bool eliminateDeadSwitchCases(SwitchInst *SI, DomTreeUpdater *DTU, for (const auto &Case : SI->cases()) { auto *Successor = Case.getCaseSuccessor(); if (DTU) { - if (!NumPerSuccessorCases.count(Successor)) + auto [It, Inserted] = NumPerSuccessorCases.try_emplace(Successor); + if (Inserted) UniqueSuccessors.push_back(Successor); - ++NumPerSuccessorCases[Successor]; + ++It->second; } const APInt &CaseVal = Case.getCaseValue()->getValue(); if (Known.Zero.intersects(CaseVal) || !Known.One.isSubsetOf(CaseVal) ||