Make the GraphRoot edge look like a chain edge, which is more accurate,

and use the right result number, in the off chance that the graph root
has multiple result values.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53923 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGPrinter.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGPrinter.cpp
index 184c50e9037d245c871fdba395c157338cedb6a6..4bcd916ff845f8539c086ec7bdf2150da47770cf 100644 (file)
--- a/lib/CodeGen/SelectionDAG/SelectionDAGPrinter.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGPrinter.cpp
@@ -110,7 +110,8 @@ namespace llvm {
                                        GraphWriter<SelectionDAG*> &GW) {
       GW.emitSimpleNode(0, "plaintext=circle", "GraphRoot");
       if (G->getRoot().Val)
-        GW.emitEdge(0, -1, G->getRoot().Val, -1, "");
+        GW.emitEdge(0, -1, G->getRoot().Val, G->getRoot().ResNo,
+                    "color=blue,style=dashed");
     }
   };
 }