[llvm] 2130b9c - [Coroutines] Avoid repeated hash lookups (NFC) (#127956)

[via llvm-commits]

Author: Kazu Hirata
Date: 2025-02-19T23:29:46-08:00
New Revision: 2130b9cea4c3274375be53c981d23b1838897e38

URL: https://github.com/llvm/llvm-project/commit/2130b9cea4c3274375be53c981d23b1838897e38
DIFF: https://github.com/llvm/llvm-project/commit/2130b9cea4c3274375be53c981d23b1838897e38.diff

LOG: [Coroutines] Avoid repeated hash lookups (NFC) (#127956)

Added: 
    

Modified: 
    llvm/lib/Transforms/Coroutines/MaterializationUtils.cpp

Removed: 
    


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diff  --git a/llvm/lib/Transforms/Coroutines/MaterializationUtils.cpp b/llvm/lib/Transforms/Coroutines/MaterializationUtils.cpp
index 5021425152f6c..6aaabca95c4c3 100644
--- a/llvm/lib/Transforms/Coroutines/MaterializationUtils.cpp
+++ b/llvm/lib/Transforms/Coroutines/MaterializationUtils.cpp
@@ -293,7 +293,8 @@ void coro::doRematerializations(
     for (Instruction *U : E.second) {
       // Don't process a user twice (this can happen if the instruction uses
       // more than one rematerializable def)
-      if (AllRemats.count(U))
+      auto [It, Inserted] = AllRemats.try_emplace(U);
+      if (!Inserted)
         continue;
 
       // Constructor creates the whole RematGraph for the given Use
@@ -306,7 +307,7 @@ void coro::doRematerializations(
                       ++I) { (*I)->Node->dump(); } dbgs()
                  << "\n";);
 
-      AllRemats[U] = std::move(RematUPtr);
+      It->second = std::move(RematUPtr);
     }
   }