From 3371fd5f577ca731314a367af793384f38e16574 Mon Sep 17 00:00:00 2001
From: Will Froom <willfroom@google.com>
Date: Thu, 28 Aug 2025 12:40:06 +0000
Subject: [PATCH] [ADT] Fix signed integer overflow

---
 llvm/include/llvm/ADT/DenseMapInfo.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/llvm/include/llvm/ADT/DenseMapInfo.h b/llvm/include/llvm/ADT/DenseMapInfo.h
index 930bd4baca31d..ec7a116856bb4 100644
--- a/llvm/include/llvm/ADT/DenseMapInfo.h
+++ b/llvm/include/llvm/ADT/DenseMapInfo.h
@@ -124,7 +124,8 @@ struct DenseMapInfo<
     if constexpr (std::is_unsigned_v<T> && sizeof(T) > sizeof(unsigned))
       return densemap::detail::mix(Val);
     else
-      return static_cast<unsigned>(Val * 37U);
+      return static_cast<unsigned>(Val *
+                                   static_cast<std::make_unsigned_t<T>>(37U));
   }
 
   static bool isEqual(const T &LHS, const T &RHS) { return LHS == RHS; }