From 8d89e7bdbcea38fe2ab3c85d91359712cd45714b Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Tue, 9 May 2006 04:13:41 +0000
Subject: Patch to make some xforms preserve each other.  Patch contributed by
 Domagoj Babic!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28181 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Transforms/Utils/Mem2Reg.cpp | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'lib/Transforms/Utils/Mem2Reg.cpp')

diff --git a/lib/Transforms/Utils/Mem2Reg.cpp b/lib/Transforms/Utils/Mem2Reg.cpp
index c15d10c824..9ca2c8300d 100644
--- a/lib/Transforms/Utils/Mem2Reg.cpp
+++ b/lib/Transforms/Utils/Mem2Reg.cpp
@@ -14,6 +14,7 @@
 
 #include "llvm/Transforms/Scalar.h"
 #include "llvm/Transforms/Utils/PromoteMemToReg.h"
+#include "llvm/Transforms/Utils/UnifyFunctionExitNodes.h"
 #include "llvm/Analysis/Dominators.h"
 #include "llvm/Instructions.h"
 #include "llvm/Function.h"
@@ -37,6 +38,10 @@ namespace {
       AU.addRequired<DominanceFrontier>();
       AU.addRequired<TargetData>();
       AU.setPreservesCFG();
+      // This is a cluster of orthogonal Transforms
+      AU.addPreserved<UnifyFunctionExitNodes>();
+      AU.addPreservedID(LowerSelectID);
+      AU.addPreservedID(LowerSwitchID);
     }
   };
 
-- 
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