add a new CallGraphNode::replaceCallEdge method and use it from

argpromote to avoid invalidating an iterator.  This fixes PR4977.
All clang tests now pass with expensive checking (on my system 
at least).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81843 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 6 insertions, 0 deletions

diff --git a/include/llvm/Analysis/CallGraph.h b/include/llvm/Analysis/CallGraph.h
index 1d23c69..bcb6dee 100644
--- a/include/llvm/Analysis/CallGraph.h
+++ b/include/llvm/Analysis/CallGraph.h
@@ -270,6 +270,12 @@ public:
   /// removeOneAbstractEdgeTo - Remove one edge associated with a null callsite
   /// from this node to the specified callee function.
   void removeOneAbstractEdgeTo(CallGraphNode *Callee);
+  
+  /// replaceCallEdge - This method replaces the edge in the node for the
+  /// specified call site with a new one.  Note that this method takes linear
+  /// time, so it should be used sparingly.
+  void replaceCallEdge(CallSite CS, CallSite NewCS, CallGraphNode *NewNode);
+  
 };
 
 //===----------------------------------------------------------------------===//