Use setPreservesAll and setPreservesCFG in CodeGen passes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77754 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/StackSlotColoring.cpp

@@ -97,6 +97,7 @@ namespace {
       MachineFunctionPass(&ID), ColorWithRegs(RegColor), NextColor(-1) {}
     
     virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+      AU.setPreservesCFG();
       AU.addRequired<LiveStacks>();
       AU.addRequired<VirtRegMap>();
       AU.addPreserved<VirtRegMap>();