Adapt to LLVM head, again

llvm-svn: 261905
diff --git a/polly/lib/CodeGen/CodeGeneration.cpp b/polly/lib/CodeGen/CodeGeneration.cpp
index 0a52863..d66ff94 100644
--- a/polly/lib/CodeGen/CodeGeneration.cpp
+++ b/polly/lib/CodeGen/CodeGeneration.cpp
@@ -206,7 +206,7 @@
     AU.addPreserved<LoopInfoWrapperPass>();
     AU.addPreserved<DominatorTreeWrapperPass>();
     AU.addPreserved<GlobalsAAWrapperPass>();
-    AU.addPreserved<PostDominatorTree>();
+    AU.addPreserved<PostDominatorTreeWrapperPass>();
     AU.addPreserved<IslAstInfo>();
     AU.addPreserved<ScopDetection>();
     AU.addPreserved<ScalarEvolutionWrapperPass>();