Let MemoryDependenceAnalysis take care of updating AliasAnalysis.

llvm-svn: 39769
diff --git a/llvm/lib/Analysis/MemoryDependenceAnalysis.cpp b/llvm/lib/Analysis/MemoryDependenceAnalysis.cpp
index 1225ebb..fa43954 100644
--- a/llvm/lib/Analysis/MemoryDependenceAnalysis.cpp
+++ b/llvm/lib/Analysis/MemoryDependenceAnalysis.cpp
@@ -255,4 +255,6 @@
     reverseDep.erase(I);
     I = reverseDep.find(rem);
   }
+  
+  getAnalysis<AliasAnalysis>().deleteValue(rem);
 }