From 31ceedd70ddaf3fefc47ad06b3774933e61f0f60 Mon Sep 17 00:00:00 2001
From: Kazu Hirata <kazu@google.com>
Date: Thu, 13 Nov 2025 09:00:17 -0800
Subject: [PATCH] [ADT] Fix a memory leak in SmallDenseMap

Tmp.moveFrom(*this); about 10 lines above leaves *this in a zombie
state with a bucket array still allocated.  This patch fixes the
memory leak by calling deallocateBuckets().
---
 llvm/include/llvm/ADT/DenseMap.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/llvm/include/llvm/ADT/DenseMap.h b/llvm/include/llvm/ADT/DenseMap.h
index 9d61a91631fab..333bbcb9399ce 100644
--- a/llvm/include/llvm/ADT/DenseMap.h
+++ b/llvm/include/llvm/ADT/DenseMap.h
@@ -1122,6 +1122,7 @@ class SmallDenseMap
       Tmp.Small = false;
       Tmp.getLargeRep()->NumBuckets = 0;
     } else {
+      deallocateBuckets();
       Small = false;
       NumTombstones = 0;
       *getLargeRep() = std::move(*Tmp.getLargeRep());