[llvm] [GVN] Support rnflow pattern matching and transform (PR #162259)

[Nikita Popov via llvm-commits]

================
@@ -22,6 +22,7 @@
 #include "llvm/IR/Dominators.h"
 #include "llvm/IR/InstrTypes.h"
 #include "llvm/IR/PassManager.h"
+#include "llvm/Analysis/LoopInfo.h"
----------------
nikic wrote:

Can forward declare `Loop` instead?

https://github.com/llvm/llvm-project/pull/162259