[llvm] b2c8f66 - [Passes] Avoid repeated hash lookups (NFC) (#128828)

[via llvm-commits]

Author: Kazu Hirata
Date: 2025-02-26T00:57:10-08:00
New Revision: b2c8f66eea8119efd9ec2b3b0794946a7806c3c6

URL: https://github.com/llvm/llvm-project/commit/b2c8f66eea8119efd9ec2b3b0794946a7806c3c6
DIFF: https://github.com/llvm/llvm-project/commit/b2c8f66eea8119efd9ec2b3b0794946a7806c3c6.diff

LOG: [Passes] Avoid repeated hash lookups (NFC) (#128828)

Added: 
    

Modified: 
    llvm/lib/Passes/StandardInstrumentations.cpp

Removed: 
    


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diff  --git a/llvm/lib/Passes/StandardInstrumentations.cpp b/llvm/lib/Passes/StandardInstrumentations.cpp
index b766517e68eba..5d4f9ac1496fc 100644
--- a/llvm/lib/Passes/StandardInstrumentations.cpp
+++ b/llvm/lib/Passes/StandardInstrumentations.cpp
@@ -2022,12 +2022,9 @@ DotCfgDiff::DotCfgDiff(StringRef Title, const FuncDataT<DCData> &Before,
          Sink != E; ++Sink) {
       std::string Key = (Label + " " + Sink->getKey().str()).str() + " " +
                         BD.getData().getSuccessorLabel(Sink->getKey()).str();
-      unsigned C = EdgesMap.count(Key);
-      if (C == 0)
-        EdgesMap.insert({Key, AfterColour});
-      else {
-        EdgesMap[Key] = CommonColour;
-      }
+      auto [It, Inserted] = EdgesMap.try_emplace(Key, AfterColour);
+      if (!Inserted)
+        It->second = CommonColour;
     }
   }