[llvm] cee6509 - [ARM] Avoid repeated hash lookups (NFC) (#109602)

[via llvm-commits]

Author: Kazu Hirata
Date: 2024-09-23T06:42:06-07:00
New Revision: cee65092c95a216e63d970b5da1495eb33dd506a

URL: https://github.com/llvm/llvm-project/commit/cee65092c95a216e63d970b5da1495eb33dd506a
DIFF: https://github.com/llvm/llvm-project/commit/cee65092c95a216e63d970b5da1495eb33dd506a.diff

LOG: [ARM] Avoid repeated hash lookups (NFC) (#109602)

Added: 
    

Modified: 
    llvm/lib/Target/ARM/ARMLowOverheadLoops.cpp

Removed: 
    


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diff  --git a/llvm/lib/Target/ARM/ARMLowOverheadLoops.cpp b/llvm/lib/Target/ARM/ARMLowOverheadLoops.cpp
index a4598de96fa3b4..e7dfbfb64fa521 100644
--- a/llvm/lib/Target/ARM/ARMLowOverheadLoops.cpp
+++ b/llvm/lib/Target/ARM/ARMLowOverheadLoops.cpp
@@ -144,10 +144,9 @@ namespace {
     void ProcessLoop() {
       std::function<void(MachineBasicBlock *)> Search =
           [this, &Search](MachineBasicBlock *MBB) -> void {
-        if (Visited.count(MBB))
+        if (!Visited.insert(MBB).second)
           return;
 
-        Visited.insert(MBB);
         for (auto *Succ : MBB->successors()) {
           if (!ML.contains(Succ))
             continue;