Preserve and update ETForest. Patch by Daniel Berlin

llvm-svn: 25203

1 files changed, 5 insertions, 0 deletions

diff --git a/llvm/lib/Transforms/Utils/BreakCriticalEdges.cpp b/llvm/lib/Transforms/Utils/BreakCriticalEdges.cpp
index 7e44574a6e8..5bb7d46908c 100644
--- a/llvm/lib/Transforms/Utils/BreakCriticalEdges.cpp
+++ b/llvm/lib/Transforms/Utils/BreakCriticalEdges.cpp
@@ -34,6 +34,7 @@ namespace {
     virtual bool runOnFunction(Function &F);
 
     virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+      AU.addPreserved<ETForest>();
       AU.addPreserved<DominatorSet>();
       AU.addPreserved<ImmediateDominators>();
       AU.addPreserved<DominatorTree>();
@@ -153,6 +154,10 @@ bool llvm::SplitCriticalEdge(TerminatorInst *TI, unsigned SuccNum, Pass *P) {
     ID->addNewBlock(NewBB, TIBB);
   }
 
+  // Update the forest?
+  if (ETForest *EF = P->getAnalysisToUpdate<ETForest>())
+    EF->addNewBlock(NewBB, TIBB);
+
   // Should we update DominatorTree information?
   if (DominatorTree *DT = P->getAnalysisToUpdate<DominatorTree>()) {
     DominatorTree::Node *TINode = DT->getNode(TIBB);