simplify by using CallSite constructors; virtually eliminates CallSite::get from the tree

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109687 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/opt/AnalysisWrappers.cpp b/tools/opt/AnalysisWrappers.cpp
index f548d00..a4891d8 100644
--- a/tools/opt/AnalysisWrappers.cpp
+++ b/tools/opt/AnalysisWrappers.cpp
@@ -42,8 +42,8 @@
           Instruction *User = dyn_cast<Instruction>(*UI);
           if (!User) continue;
           
-          CallSite CS = CallSite::get(User);
-          if (!CS.getInstruction()) continue;
+          CallSite CS(cast<Value>(User));
+          if (!CS) continue;
           
           for (CallSite::arg_iterator AI = CS.arg_begin(),
                E = CS.arg_end(); AI != E; ++AI) {