From a3477fe06df794e0eae26ea243f25912c619a6c4 Mon Sep 17 00:00:00 2001
From: Dan Gohman <gohman@apple.com>
Date: Fri, 31 Jul 2009 23:36:22 +0000
Subject: [PATCH] SelectionDAGISel does not "preserve all", since it makes lots
 of changes to the MachineFunction.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77753 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
index 1072c95acd5..301c5a7262c 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
@@ -289,9 +289,11 @@ unsigned SelectionDAGISel::MakeReg(MVT VT) {
 
 void SelectionDAGISel::getAnalysisUsage(AnalysisUsage &AU) const {
   AU.addRequired<AliasAnalysis>();
+  AU.addPreserved<AliasAnalysis>();
   AU.addRequired<GCModuleInfo>();
+  AU.addPreserved<GCModuleInfo>();
   AU.addRequired<DwarfWriter>();
-  AU.setPreservesAll();
+  AU.addPreserved<DwarfWriter>();
   MachineFunctionPass::getAnalysisUsage(AU);
 }