[llvm] bc7e5c2 - [SLP] Avoid repeated hash lookups (NFC) (#115428)

[via llvm-commits]

Author: Kazu Hirata
Date: 2024-11-08T07:35:06-08:00
New Revision: bc7e5c2016e287b768d2a3a1de15f6bb644622ae

URL: https://github.com/llvm/llvm-project/commit/bc7e5c2016e287b768d2a3a1de15f6bb644622ae
DIFF: https://github.com/llvm/llvm-project/commit/bc7e5c2016e287b768d2a3a1de15f6bb644622ae.diff

LOG: [SLP] Avoid repeated hash lookups (NFC) (#115428)

Added: 
    

Modified: 
    llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp

Removed: 
    


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diff  --git a/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp b/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
index c5b3537bc57bcb..a6accf0318a30f 100644
--- a/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
+++ b/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
@@ -2241,10 +2241,9 @@ class BoUpSLP {
           HashMap[NumFreeOpsHash.Hash] = std::make_pair(1, Lane);
         } else if (NumFreeOpsHash.NumOfAPOs == Min &&
                    NumFreeOpsHash.NumOpsWithSameOpcodeParent == SameOpNumber) {
-          auto *It = HashMap.find(NumFreeOpsHash.Hash);
-          if (It == HashMap.end())
-            HashMap[NumFreeOpsHash.Hash] = std::make_pair(1, Lane);
-          else
+          auto [It, Inserted] =
+              HashMap.try_emplace(NumFreeOpsHash.Hash, 1, Lane);
+          if (!Inserted)
             ++It->second.first;
         }
       }