[llvm] [NFC][LLVM] Namespace cleanup in LoopFuse (PR #163758)

[Rahul Joshi via llvm-commits]

================
@@ -445,9 +445,19 @@ struct FusionCandidateCompare {
         "No dominance relationship between these fusion candidates!");
   }
 };
+} // namespace
 
 using LoopVector = SmallVector<Loop *, 4>;
 
+#ifndef NDEBUG
----------------
jurahul wrote:

Done.

https://github.com/llvm/llvm-project/pull/163758