Implement optimization for direct function call case.  This dramatically
reduces the number of function nodes created and speeds up analysis by
about 10% overall.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5495 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/DataStructure/IPModRef.cpp b/lib/Analysis/DataStructure/IPModRef.cpp
index e04e109..a8aa6c2 100644
--- a/lib/Analysis/DataStructure/IPModRef.cpp
+++ b/lib/Analysis/DataStructure/IPModRef.cpp
@@ -144,7 +144,7 @@
   Result->maskNodeTypes(~(DSNode::Modified | DSNode::Read));
 
   // Step #3: clone the bottom up graphs for the callees into the caller graph
-  if (const Function *F = CI.getCalledFunction())
+  if (Function *F = CI.getCalledFunction())
     {
       assert(!F->isExternal());
 
@@ -162,7 +162,7 @@
           Args.push_back(Result->getNodeForValue(CI.getOperand(i)));
 
       // Build the call site...
-      DSCallSite CS(CI, RetVal, 0, Args);
+      DSCallSite CS(CI, RetVal, F, Args);
 
       // Perform the merging now of the graph for the callee, which will
       // come with mod/ref bits set...