[llvm] ba3d174 - [FuzzMutate] Avoid repeated hash lookups (NFC) (#109903)

[via llvm-commits]

Author: Kazu Hirata
Date: 2024-09-25T01:30:03-07:00
New Revision: ba3d174d3f9ec4fb98a837e4e5089094405e1d33

URL: https://github.com/llvm/llvm-project/commit/ba3d174d3f9ec4fb98a837e4e5089094405e1d33
DIFF: https://github.com/llvm/llvm-project/commit/ba3d174d3f9ec4fb98a837e4e5089094405e1d33.diff

LOG: [FuzzMutate] Avoid repeated hash lookups (NFC) (#109903)

Added: 
    

Modified: 
    llvm/lib/FuzzMutate/IRMutator.cpp

Removed: 
    


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diff  --git a/llvm/lib/FuzzMutate/IRMutator.cpp b/llvm/lib/FuzzMutate/IRMutator.cpp
index 72e0de59376076..e1fe6c8d89ab05 100644
--- a/llvm/lib/FuzzMutate/IRMutator.cpp
+++ b/llvm/lib/FuzzMutate/IRMutator.cpp
@@ -623,9 +623,11 @@ void ShuffleBlockStrategy::mutate(BasicBlock &BB, RandomIRBuilder &IB) {
   auto getAliveChildren = [&AliveInstsLookup](Instruction *I) {
     SmallSetVector<size_t, 8> Children;
     for (Value *U : I->users()) {
-      Instruction *P = dyn_cast<Instruction>(U);
-      if (P && AliveInstsLookup.count(P))
-        Children.insert(AliveInstsLookup[P]);
+      if (Instruction *P = dyn_cast<Instruction>(U)) {
+        auto It = AliveInstsLookup.find(P);
+        if (It != AliveInstsLookup.end())
+          Children.insert(It->second);
+      }
     }
     return Children;
   };