[llvm] 4a8f414 - [Utils] Avoid repeated hash lookups (NFC) (#127959)

[via llvm-commits]

Author: Kazu Hirata
Date: 2025-02-20T08:56:56-08:00
New Revision: 4a8f41456515953cb8a5f9f1b927c9f60436f56a

URL: https://github.com/llvm/llvm-project/commit/4a8f41456515953cb8a5f9f1b927c9f60436f56a
DIFF: https://github.com/llvm/llvm-project/commit/4a8f41456515953cb8a5f9f1b927c9f60436f56a.diff

LOG: [Utils] Avoid repeated hash lookups (NFC) (#127959)

Added: 
    

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

Removed: 
    


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diff  --git a/llvm/lib/Transforms/Utils/AssumeBundleBuilder.cpp b/llvm/lib/Transforms/Utils/AssumeBundleBuilder.cpp
index 2d9a3d1f8a110..78b9c7d06e183 100644
--- a/llvm/lib/Transforms/Utils/AssumeBundleBuilder.cpp
+++ b/llvm/lib/Transforms/Utils/AssumeBundleBuilder.cpp
@@ -178,11 +178,9 @@ struct AssumeBuilderState {
     if (tryToPreserveWithoutAddingAssume(RK))
       return;
     MapKey Key{RK.WasOn, RK.AttrKind};
-    auto Lookup = AssumedKnowledgeMap.find(Key);
-    if (Lookup == AssumedKnowledgeMap.end()) {
-      AssumedKnowledgeMap[Key] = RK.ArgValue;
+    auto [Lookup, Inserted] = AssumedKnowledgeMap.try_emplace(Key, RK.ArgValue);
+    if (Inserted)
       return;
-    }
     assert(((Lookup->second == 0 && RK.ArgValue == 0) ||
             (Lookup->second != 0 && RK.ArgValue != 0)) &&
            "inconsistent argument value");