From 85c97c1cec63da27d9f16b0b7c44d65a0e3da0a4 Mon Sep 17 00:00:00 2001
From: Kazu Hirata <kazu@google.com>
Date: Thu, 12 Sep 2024 00:51:38 -0700
Subject: [Bytecode] Avoid repeated hash lookups (NFC) (#108320)

---
 mlir/lib/Bytecode/Reader/BytecodeReader.cpp | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

(limited to 'mlir/lib/Bytecode/Reader/BytecodeReader.cpp')

diff --git a/mlir/lib/Bytecode/Reader/BytecodeReader.cpp b/mlir/lib/Bytecode/Reader/BytecodeReader.cpp
index a57b217..e9de306 100644
--- a/mlir/lib/Bytecode/Reader/BytecodeReader.cpp
+++ b/mlir/lib/Bytecode/Reader/BytecodeReader.cpp
@@ -2017,10 +2017,9 @@ LogicalResult BytecodeReader::Impl::sortUseListOrder(Value value) {
   DenseSet<unsigned> set;
   uint64_t accumulator = 0;
   for (const auto &elem : shuffle) {
-    if (set.contains(elem))
+    if (!set.insert(elem).second)
       return failure();
     accumulator += elem;
-    set.insert(elem);
   }
   if (numUses != shuffle.size() ||
       accumulator != (((numUses - 1) * numUses) >> 1))
-- 
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