From 2e8466c22ae01a0d957607868e8b47abcef26346 Mon Sep 17 00:00:00 2001
From: Devang Patel <dpatel@apple.com>
Date: Mon, 30 Jul 2007 20:19:59 +0000
Subject: [PATCH] LICM preserves scalar evolution and dom frontier.

llvm-svn: 40602
---
 lib/Transforms/Scalar/LICM.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/Transforms/Scalar/LICM.cpp b/lib/Transforms/Scalar/LICM.cpp
index 77ac5634bd9..a4aa12ababd 100644
--- a/lib/Transforms/Scalar/LICM.cpp
+++ b/lib/Transforms/Scalar/LICM.cpp
@@ -42,6 +42,7 @@
 #include "llvm/Analysis/AliasAnalysis.h"
 #include "llvm/Analysis/AliasSetTracker.h"
 #include "llvm/Analysis/Dominators.h"
+#include "llvm/Analysis/ScalarEvolution.h"
 #include "llvm/Transforms/Utils/PromoteMemToReg.h"
 #include "llvm/Support/CFG.h"
 #include "llvm/Support/Compiler.h"
@@ -78,6 +79,8 @@ namespace {
       AU.addRequired<DominatorTree>();
       AU.addRequired<DominanceFrontier>();  // For scalar promotion (mem2reg)
       AU.addRequired<AliasAnalysis>();
+      AU.addPreserved<ScalarEvolution>();
+      AU.addPreserved<DominanceFrontier>();
     }
 
     bool doFinalization() {