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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4269 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 4 insertions, 0 deletions

diff --git a/lib/CodeGen/InstrSelection/InstrSelection.cpp b/lib/CodeGen/InstrSelection/InstrSelection.cpp
index 28bfb74666..a9d1331c94 100644
--- a/lib/CodeGen/InstrSelection/InstrSelection.cpp
+++ b/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);
   };