Machine CSE preserves CFG. Pass manager was freeing machineloopinfo after machine cse before.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111281 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 1 insertions, 0 deletions

diff --git a/lib/CodeGen/MachineCSE.cpp b/lib/CodeGen/MachineCSE.cpp
index 60642d4622..92e2299ec6 100644
--- a/lib/CodeGen/MachineCSE.cpp
+++ b/lib/CodeGen/MachineCSE.cpp
@@ -49,6 +49,7 @@ namespace {
       AU.setPreservesCFG();
       MachineFunctionPass::getAnalysisUsage(AU);
       AU.addRequired<AliasAnalysis>();
+      AU.addPreservedID(MachineLoopInfoID);
       AU.addRequired<MachineDominatorTree>();
       AU.addPreserved<MachineDominatorTree>();
     }