For PR797:

[oota-llvm.git] / lib / Support / GraphWriter.cpp

diff --git a/lib/Support/GraphWriter.cpp b/lib/Support/GraphWriter.cpp
index f3255d815c6c7659934069dba8c1419686c629a8..152261fbac62f36c9c1049d9e8165ec6334daa1f 100644 (file)
--- a/lib/Support/GraphWriter.cpp
+++ b/lib/Support/GraphWriter.cpp
@@ -59,7 +59,9 @@ void llvm::DisplayGraph(const sys::Path &Filename) {
     args.push_back(PSFilename.c_str());
     args.push_back(0);
     
-    sys::Program::ExecuteAndWait(gv, &args[0]);
+    if (sys::Program::ExecuteAndWait(gv, &args[0])) {
+      std::cerr << "Error viewing graph: 'gv' not in path?\n";
+    }
   }
   PSFilename.eraseFromDisk();
 #elif HAVE_DOTTY