Added graphviz/gv support for MF.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23700 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/MachineFunction.cpp b/lib/CodeGen/MachineFunction.cpp
index 2e3088c7e3b1ac9adacc799390632e289d4ef927..f0ece6b3dbbec51691d853cc9e31875e03cfbc9b 100644 (file)
--- a/lib/CodeGen/MachineFunction.cpp
+++ b/lib/CodeGen/MachineFunction.cpp
@@ -25,6 +25,7 @@
 #include "llvm/Instructions.h"
 #include "llvm/Support/LeakDetector.h"
 #include "llvm/Support/GraphWriter.h"
+#include "llvm/Config/config.h"
 #include <fstream>
 #include <iostream>
 #include <sstream>
@@ -206,6 +207,7 @@ namespace llvm {
 
 void MachineFunction::viewCFG() const
 {
+#ifndef NDEBUG
   std::string Filename = "/tmp/cfg." + getFunction()->getName() + ".dot";
   std::cerr << "Writing '" << Filename << "'... ";
   std::ofstream F(Filename.c_str());
@@ -219,6 +221,17 @@ void MachineFunction::viewCFG() const
   F.close();
   std::cerr << "\n";
 
+#ifdef HAVE_GRAPHVIZ
+  std::cerr << "Running 'Graphviz' program... " << std::flush;
+  if (system((LLVM_PATH_GRAPHVIZ " " + Filename).c_str())) {
+    std::cerr << "Error viewing graph: 'Graphviz' not in path?\n";
+  } else {
+    system(("rm " + Filename).c_str());
+    return;
+  }
+#endif  // HAVE_GRAPHVIZ
+
+#ifdef HAVE_GV
   std::cerr << "Running 'dot' program... " << std::flush;
   if (system(("dot -Tps -Nfontname=Courier -Gsize=7.5,10 " + Filename
               + " > /tmp/cfg.tempgraph.ps").c_str())) {
@@ -228,6 +241,15 @@ void MachineFunction::viewCFG() const
     system("gv /tmp/cfg.tempgraph.ps");
   }
   system(("rm " + Filename + " /tmp/cfg.tempgraph.ps").c_str());
+  return;
+#endif  // HAVE_GV
+#endif  // NDEBUG
+  std::cerr << "MachineFunction::viewCFG is only available in debug builds on "
+            << "systems with Graphviz or gv!\n";
+
+#ifndef NDEBUG
+  system(("rm " + Filename).c_str());
+#endif
 }
 
 void MachineFunction::viewCFGOnly() const