[llvm] [Vectorize] Avoid repeated hash lookups (NFC) (PR #107729)

[Kazu Hirata via llvm-commits]

https://github.com/kazutakahirata created https://github.com/llvm/llvm-project/pull/107729

None

>From 3b4c4d9ac7ece77d518b42e3172c3e4d4b17db62 Mon Sep 17 00:00:00 2001
From: Kazu Hirata <kazu at google.com>
Date: Sat, 7 Sep 2024 11:30:19 -0700
Subject: [PATCH] [Vectorize] Avoid repeated hash lookups (NFC)

---
 llvm/lib/Transforms/Vectorize/VPlanVerifier.cpp | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/llvm/lib/Transforms/Vectorize/VPlanVerifier.cpp b/llvm/lib/Transforms/Vectorize/VPlanVerifier.cpp
index 765dc983cab4fb..dfddb5b45f623d 100644
--- a/llvm/lib/Transforms/Vectorize/VPlanVerifier.cpp
+++ b/llvm/lib/Transforms/Vectorize/VPlanVerifier.cpp
@@ -177,9 +177,8 @@ bool VPlanVerifier::verifyVPBasicBlock(const VPBasicBlock *VPBB) {
 static bool hasDuplicates(const SmallVectorImpl<VPBlockBase *> &VPBlockVec) {
   SmallDenseSet<const VPBlockBase *, 8> VPBlockSet;
   for (const auto *Block : VPBlockVec) {
-    if (VPBlockSet.count(Block))
+    if (!VPBlockSet.insert(Block).second)
       return true;
-    VPBlockSet.insert(Block);
   }
   return false;
 }