[llvm] e9e717f - [Utils] Avoid repeated hash lookups (NFC) (#126856)

[via llvm-commits]

Author: Kazu Hirata
Date: 2025-02-12T08:48:16-08:00
New Revision: e9e717f4053ee293d42ecaefaa04e473b0e1b469

URL: https://github.com/llvm/llvm-project/commit/e9e717f4053ee293d42ecaefaa04e473b0e1b469
DIFF: https://github.com/llvm/llvm-project/commit/e9e717f4053ee293d42ecaefaa04e473b0e1b469.diff

LOG: [Utils] Avoid repeated hash lookups (NFC) (#126856)

Added: 
    

Modified: 
    llvm/include/llvm/Transforms/Utils/SampleProfileLoaderBaseImpl.h

Removed: 
    


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diff  --git a/llvm/include/llvm/Transforms/Utils/SampleProfileLoaderBaseImpl.h b/llvm/include/llvm/Transforms/Utils/SampleProfileLoaderBaseImpl.h
index d86630decd3ae..44cb5183fb31d 100644
--- a/llvm/include/llvm/Transforms/Utils/SampleProfileLoaderBaseImpl.h
+++ b/llvm/include/llvm/Transforms/Utils/SampleProfileLoaderBaseImpl.h
@@ -881,19 +881,21 @@ void SampleProfileLoaderBaseImpl<BT>::buildEdges(FunctionT &F) {
 
     // Add predecessors for B1.
     SmallPtrSet<BasicBlockT *, 16> Visited;
-    if (!Predecessors[B1].empty())
+    auto &Preds = Predecessors[B1];
+    if (!Preds.empty())
       llvm_unreachable("Found a stale predecessors list in a basic block.");
     for (auto *B2 : getPredecessors(B1))
       if (Visited.insert(B2).second)
-        Predecessors[B1].push_back(B2);
+        Preds.push_back(B2);
 
     // Add successors for B1.
     Visited.clear();
-    if (!Successors[B1].empty())
+    auto &Succs = Successors[B1];
+    if (!Succs.empty())
       llvm_unreachable("Found a stale successors list in a basic block.");
     for (auto *B2 : getSuccessors(B1))
       if (Visited.insert(B2).second)
-        Successors[B1].push_back(B2);
+        Succs.push_back(B2);
   }
 }