[llvm] 1ae5ecc - [Utils] Avoid repeated hash lookups (NFC) (#115262)

[via llvm-commits]

Author: Kazu Hirata
Date: 2024-11-07T10:55:23-08:00
New Revision: 1ae5ecca4afb5134899d79e446afd0296d1ed5ef

URL: https://github.com/llvm/llvm-project/commit/1ae5ecca4afb5134899d79e446afd0296d1ed5ef
DIFF: https://github.com/llvm/llvm-project/commit/1ae5ecca4afb5134899d79e446afd0296d1ed5ef.diff

LOG: [Utils] Avoid repeated hash lookups (NFC) (#115262)

Added: 
    

Modified: 
    llvm/lib/Transforms/Utils/Local.cpp

Removed: 
    


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diff  --git a/llvm/lib/Transforms/Utils/Local.cpp b/llvm/lib/Transforms/Utils/Local.cpp
index 47a70492559610..768765b6c1e632 100644
--- a/llvm/lib/Transforms/Utils/Local.cpp
+++ b/llvm/lib/Transforms/Utils/Local.cpp
@@ -2178,11 +2178,9 @@ void llvm::insertDebugValuesForPHIs(BasicBlock *BB,
       auto V = DbgValueMap.find(VI);
       if (V != DbgValueMap.end()) {
         auto *DbgII = cast<DbgVariableIntrinsic>(V->second);
-        auto NewDI = NewDbgValueMap.find({Parent, DbgII});
-        if (NewDI == NewDbgValueMap.end()) {
-          auto *NewDbgII = cast<DbgVariableIntrinsic>(DbgII->clone());
-          NewDI = NewDbgValueMap.insert({{Parent, DbgII}, NewDbgII}).first;
-        }
+        auto [NewDI, Inserted] = NewDbgValueMap.try_emplace({Parent, DbgII});
+        if (Inserted)
+          NewDI->second = cast<DbgVariableIntrinsic>(DbgII->clone());
         DbgVariableIntrinsic *NewDbgII = NewDI->second;
         // If PHI contains VI as an operand more than once, we may
         // replaced it in NewDbgII; confirm that it is present.