Tell PassManager that this pass does not invalidate the CFG so that dominator

information and Loop info will not have to be recomputed after this runs.

llvm-svn: 4269

lib/CodeGen/InstrSched/InstrScheduling.cpp

@@ -1499,6 +1499,7 @@ namespace {
     // getAnalysisUsage - We use LiveVarInfo...
     virtual void getAnalysisUsage(AnalysisUsage &AU) const {
       AU.addRequired<FunctionLiveVarInfo>();
+      AU.setPreservesCFG();
     }
     
     bool runOnFunction(Function &F);

lib/CodeGen/InstrSelection/InstrSelection.cpp

@@ -63,6 +63,10 @@ namespace {
                                        int ruleForNode, short* nts);
   public:
     InstructionSelection(TargetMachine &T) : Target(T) {}
+
+    virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+      AU.setPreservesCFG();
+    }
     
     bool runOnFunction(Function &F);
   };