If the Graphviz program is available, use it to visualize dot graphs.

llvm-svn: 22429

1 files changed, 10 insertions, 1 deletions

diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGPrinter.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGPrinter.cpp
index d4c1dcd3b8a..8ab6783d561 100644
--- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGPrinter.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGPrinter.cpp
@@ -116,10 +116,19 @@ void SelectionDAG::viewGraph() {
   F.close();
   std::cerr << "\n";
 
+#ifdef HAVE_GRAPHVIZ
+  std::cerr << "Running 'Graphviz' program... " << std::flush;
+  if (system(("Graphviz " + Filename).c_str())) {
+    std::cerr << "Error viewing graph: 'Graphviz' not in path?\n";
+  } else {
+    return;
+  }
+#endif
+
   std::cerr << "Running 'dot' program... " << std::flush;
   if (system(("dot -Tps -Nfontname=Courier -Gsize=7.5,10 " + Filename
               + " > /tmp/dag.tempgraph.ps").c_str())) {
-    std::cerr << "Error running dot: 'dot' not in path?\n";
+    std::cerr << "Error viewing graph: 'dot' not in path?\n";
   } else {
     std::cerr << "\n";
     system("gv /tmp/dag.tempgraph.ps");