[NewGVN] Preserve TargetLibraryInfo analysis.

We can maybe preserve more but this is a first step.
Ack'ed by Danny on IRC.

llvm-svn: 293694
diff --git a/llvm/lib/Transforms/Scalar/GVN.cpp b/llvm/lib/Transforms/Scalar/GVN.cpp
index 2f861ba..dac7408 100644
--- a/llvm/lib/Transforms/Scalar/GVN.cpp
+++ b/llvm/lib/Transforms/Scalar/GVN.cpp
@@ -595,6 +595,7 @@
   PreservedAnalyses PA;
   PA.preserve<DominatorTreeAnalysis>();
   PA.preserve<GlobalsAA>();
+  PA.preserve<TargetLibraryAnalysis>();
   return PA;
 }
 
@@ -2784,6 +2785,7 @@
 
     AU.addPreserved<DominatorTreeWrapperPass>();
     AU.addPreserved<GlobalsAAWrapperPass>();
+    AU.addPreserved<TargetLibraryInfoWrapperPass>();
     AU.addRequired<OptimizationRemarkEmitterWrapperPass>();
   }