[TurboFan]: Add JSON output for the visualizer

src/compiler/pipeline.cc

Index: src/compiler/pipeline.cc
diff --git a/src/compiler/pipeline.cc b/src/compiler/pipeline.cc
index 9889b6a030263faa6f63b393f5fed994319ad269..c42d8636743fce6b6643d6c3610162f9d380cb4d 100644
--- a/src/compiler/pipeline.cc
+++ b/src/compiler/pipeline.cc
@@ -95,18 +95,19 @@ void Pipeline::VerifyAndPrintGraph(Graph* graph, const char* phase) {
       SmartArrayPointer<char> functionname =
           info_->shared_info()->DebugName()->ToCString();
       if (strlen(functionname.get()) > 0) {
-        SNPrintF(filename, "turbo-%s-%s.dot", functionname.get(), phase);
+        SNPrintF(filename, "turbo-%s-%s.json", functionname.get(), phase);
       } else {
-        SNPrintF(filename, "turbo-%p-%s.dot", static_cast<void*>(info_), phase);
+        SNPrintF(filename, "turbo-%p-%s.json", static_cast<void*>(info_),
+                 phase);
       }
     } else {
-      SNPrintF(filename, "turbo-none-%s.dot", phase);
+      SNPrintF(filename, "turbo-none-%s.json", phase);
     }
     std::replace(filename.start(), filename.start() + filename.length(), ' ',
                  '_');
     FILE* file = base::OS::FOpen(filename.start(), "w+");
     OFStream of(file);
-    of << AsDOT(*graph);
+    of << AsJSON(*graph);

[Michael Starzinger, 2014/09/25 11:02:50]

This seems to disable dumping of ".dot" files, I think for now we should still
keep dumping them.

     fclose(file);
 
     OFStream os(stdout);