Importing rustc-1.65.0

Bug: 250026064
Test: ./build.py --lto=thin
Change-Id: If144bbb779543363527e335b12d3ae6fbb4be8f0
diff --git a/src/llvm-project/llvm/lib/Analysis/DependenceGraphBuilder.cpp b/src/llvm-project/llvm/lib/Analysis/DependenceGraphBuilder.cpp
index 6b90db4..7ee2adf 100644
--- a/src/llvm-project/llvm/lib/Analysis/DependenceGraphBuilder.cpp
+++ b/src/llvm-project/llvm/lib/Analysis/DependenceGraphBuilder.cpp
@@ -12,6 +12,7 @@
 #include "llvm/Analysis/DependenceGraphBuilder.h"
 #include "llvm/ADT/DepthFirstIterator.h"
 #include "llvm/ADT/EnumeratedArray.h"
+#include "llvm/ADT/PostOrderIterator.h"
 #include "llvm/ADT/SCCIterator.h"
 #include "llvm/ADT/Statistic.h"
 #include "llvm/Analysis/DDG.h"