Use setPreservesAll and setPreservesCFG in CodeGen passes.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77754 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/RegAllocSimple.cpp b/lib/CodeGen/RegAllocSimple.cpp
index 447e54c..2d4b9d6 100644
--- a/lib/CodeGen/RegAllocSimple.cpp
+++ b/lib/CodeGen/RegAllocSimple.cpp
@@ -70,6 +70,7 @@
     bool runOnMachineFunction(MachineFunction &Fn);
 
     virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+      AU.setPreservesCFG();
       AU.addRequiredID(PHIEliminationID);           // Eliminate PHI nodes
       MachineFunctionPass::getAnalysisUsage(AU);
     }