[llvm] [Analysis] Avoid repeated hash lookups (NFC) (PR #130236)

[Kazu Hirata via llvm-commits]

https://github.com/kazutakahirata created https://github.com/llvm/llvm-project/pull/130236

None

>From 5053ef42d62f9805c308b52dba7b5efba9d39a42 Mon Sep 17 00:00:00 2001
From: Kazu Hirata <kazu at google.com>
Date: Thu, 6 Mar 2025 08:58:03 -0800
Subject: [PATCH] [Analysis] Avoid repeated hash lookups (NFC)

---
 llvm/include/llvm/Analysis/BlockFrequencyInfoImpl.h | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/llvm/include/llvm/Analysis/BlockFrequencyInfoImpl.h b/llvm/include/llvm/Analysis/BlockFrequencyInfoImpl.h
index 9509e5234840f..66ea5ecbc4bfb 100644
--- a/llvm/include/llvm/Analysis/BlockFrequencyInfoImpl.h
+++ b/llvm/include/llvm/Analysis/BlockFrequencyInfoImpl.h
@@ -1571,7 +1571,8 @@ void BlockFrequencyInfoImpl<BT>::initTransitionProbabilities(
     SmallPtrSet<const BlockT *, 2> UniqueSuccs;
     for (const auto SI : children<const BlockT *>(BB)) {
       // Ignore cold blocks
-      if (!BlockIndex.contains(SI))
+      auto BlockIndexIt = BlockIndex.find(SI);
+      if (BlockIndexIt == BlockIndex.end())
         continue;
       // Ignore parallel edges between BB and SI blocks
       if (!UniqueSuccs.insert(SI).second)
@@ -1583,7 +1584,7 @@ void BlockFrequencyInfoImpl<BT>::initTransitionProbabilities(
 
       auto EdgeProb =
           Scaled64::getFraction(EP.getNumerator(), EP.getDenominator());
-      size_t Dst = BlockIndex.find(SI)->second;
+      size_t Dst = BlockIndexIt->second;
       Succs[Src].push_back(std::make_pair(Dst, EdgeProb));
       SumProb[Src] += EdgeProb;
     }