CallGraph: Remove almost-unused field 'Root'.

llvm-svn: 302852

1 files changed, 0 insertions, 10 deletions

diff --git a/llvm/include/llvm/Analysis/CallGraph.h b/llvm/include/llvm/Analysis/CallGraph.h
index cc4788d3eda..01469a25c96 100644
--- a/llvm/include/llvm/Analysis/CallGraph.h
+++ b/llvm/include/llvm/Analysis/CallGraph.h
@@ -41,12 +41,6 @@
 /// of all of the caller-callee relationships, which is useful for
 /// transformations.
 ///
-/// The CallGraph class also attempts to figure out what the root of the
-/// CallGraph is, which it currently does by looking for a function named
-/// 'main'. If no function named 'main' is found, the external node is used as
-/// the entry node, reflecting the fact that any function without internal
-/// linkage could be called into (which is common for libraries).
-///
 //===----------------------------------------------------------------------===//
 
 #ifndef LLVM_ANALYSIS_CALLGRAPH_H
@@ -82,10 +76,6 @@ class CallGraph {
   /// \brief A map from \c Function* to \c CallGraphNode*.
   FunctionMapTy FunctionMap;
 
-  /// \brief Root is root of the call graph, or the external node if a 'main'
-  /// function couldn't be found.
-  CallGraphNode *Root;
-
   /// \brief This node has edges to all external functions and those internal
   /// functions that have their address taken.
   CallGraphNode *ExternalCallingNode;