Request DominanceFrontiner in advance.
llvm-svn: 37954
diff --git a/llvm/lib/Transforms/Scalar/LoopRotation.cpp b/llvm/lib/Transforms/Scalar/LoopRotation.cpp
index 807d463..2a7b06c 100644
--- a/llvm/lib/Transforms/Scalar/LoopRotation.cpp
+++ b/llvm/lib/Transforms/Scalar/LoopRotation.cpp
@@ -63,6 +63,11 @@
AU.addRequiredID(LoopSimplifyID);
AU.addPreservedID(LoopSimplifyID);
AU.addPreserved<DominatorTree>();
+ // Request DominanceFrontier now, even though Loop Rotate does
+ // not use it. This allows Pass Manager to schedule Dominance
+ // Frontier early enough such that one LPPassManager can handle
+ // loop rotate as well as licm pass.
+ AU.addRequired<DominanceFrontier>();
AU.addPreserved<DominanceFrontier>();
}