From eb265cdc90fa6b515eb87c4c29cd2f1e588a0cda Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Wed, 16 Oct 2002 02:04:36 +0000
Subject: [PATCH]      * Print the "return" node in the graphs

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4199 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Analysis/DataStructure/Printer.cpp | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/lib/Analysis/DataStructure/Printer.cpp b/lib/Analysis/DataStructure/Printer.cpp
index d8e755b42bb..4235fefdce0 100644
--- a/lib/Analysis/DataStructure/Printer.cpp
+++ b/lib/Analysis/DataStructure/Printer.cpp
@@ -146,7 +146,7 @@ void DSGraph::print(std::ostream &O) const {
     O << "\tNode0x1" << "[ plaintext=circle, label =\""
       << escapeLabel("returning") << "\"];\n";
     writeEdge(O, (void*)1, "", -1, RetNode, "arrowtail=tee,color=gray63");
-  }    
+  }
 
   // Output all of the call nodes...
   for (unsigned i = 0, e = FunctionCalls.size(); i != e; ++i) {
@@ -194,6 +194,23 @@ struct DOTGraphTraits<DSGraph*> : public DefaultDOTGraphTraits {
     assert(Node == I.getNode() && "Iterator not for this node!");
     return Node->getMergeMapLabel(I.getOffset());
   }
+
+  /// addCustomGraphFeatures - Use this graph writing hook to emit call nodes
+  /// and the return node.
+  ///
+  static void addCustomGraphFeatures(DSGraph *G, GraphWriter<DSGraph*> &GW) {
+    // Output the returned value pointer...
+    if (G->getRetNode().getNode() != 0) {
+      // Output the return node...
+      GW.emitSimpleNode((void*)1, "plaintext=circle", "returning");
+
+      // Add edge from return node to real destination
+      int RetEdgeDest = G->getRetNode().getOffset();
+      if (RetEdgeDest == 0) RetEdgeDest = -1;
+      GW.emitEdge((void*)1, -1, G->getRetNode().getNode(),
+                  RetEdgeDest, "arrowtail=tee,color=gray63");
+    }
+  }
 };