[llvm] d27175d - [Scalar] Avoid repeated hash lookups (NFC) (#135751)

[via llvm-commits]

Author: Kazu Hirata
Date: 2025-04-17T23:03:39-07:00
New Revision: d27175d26e20ebc112b003c877692c06046d195b

URL: https://github.com/llvm/llvm-project/commit/d27175d26e20ebc112b003c877692c06046d195b
DIFF: https://github.com/llvm/llvm-project/commit/d27175d26e20ebc112b003c877692c06046d195b.diff

LOG: [Scalar] Avoid repeated hash lookups (NFC) (#135751)

Added: 
    

Modified: 
    llvm/lib/Transforms/Scalar/RewriteStatepointsForGC.cpp

Removed: 
    


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diff  --git a/llvm/lib/Transforms/Scalar/RewriteStatepointsForGC.cpp b/llvm/lib/Transforms/Scalar/RewriteStatepointsForGC.cpp
index 329bd45902242..7eee0283e20e6 100644
--- a/llvm/lib/Transforms/Scalar/RewriteStatepointsForGC.cpp
+++ b/llvm/lib/Transforms/Scalar/RewriteStatepointsForGC.cpp
@@ -3332,10 +3332,10 @@ static void computeLiveInValues(DominatorTree &DT, Function &F,
     LiveTmp.set_subtract(Data.KillSet[BB]);
 
     assert(Data.LiveIn.count(BB));
-    const SetVector<Value *> &OldLiveIn = Data.LiveIn[BB];
-    // assert: OldLiveIn is a subset of LiveTmp
-    if (OldLiveIn.size() != LiveTmp.size()) {
-      Data.LiveIn[BB] = LiveTmp;
+    SetVector<Value *> &LiveIn = Data.LiveIn[BB];
+    // assert: LiveIn is a subset of LiveTmp
+    if (LiveIn.size() != LiveTmp.size()) {
+      LiveIn = std::move(LiveTmp);
       Worklist.insert_range(predecessors(BB));
     }
   } // while (!Worklist.empty())