[turbolizer] Show operator properties and arity in tooltip.

src/compiler/graph-visualizer.cc

Index: src/compiler/graph-visualizer.cc
diff --git a/src/compiler/graph-visualizer.cc b/src/compiler/graph-visualizer.cc
index 53089040ab3ea607e48206df27872b17d4d129e3..dc83ccf5db632261ced48f149058f4cee8ff3eb7 100644
--- a/src/compiler/graph-visualizer.cc
+++ b/src/compiler/graph-visualizer.cc
@@ -126,12 +126,14 @@ class JSONGraphNodeWriter {
     } else {
       os_ << ",\n";
     }
-    std::ostringstream label, title;
+    std::ostringstream label, title, properties;
     node->op()->PrintTo(label, Operator::PrintVerbosity::kSilent);
     node->op()->PrintTo(title, Operator::PrintVerbosity::kVerbose);
+    node->op()->PrintPropsTo(properties);
     os_ << "{\"id\":" << SafeId(node) << ",\"label\":\"" << Escaped(label, "\"")
         << "\""
-        << ",\"title\":\"" << Escaped(title, "\"") << "\"";
+        << ",\"title\":\"" << Escaped(title, "\"") << "\""
+        << ",\"properties\":\"" << Escaped(properties, "\"") << "\"";
     IrOpcode::Value opcode = node->opcode();
     if (IrOpcode::IsPhiOpcode(opcode)) {
       os_ << ",\"rankInputs\":[0," << NodeProperties::FirstControlIndex(node)
@@ -153,6 +155,12 @@ class JSONGraphNodeWriter {
     os_ << ",\"opcode\":\"" << IrOpcode::Mnemonic(node->opcode()) << "\"";
     os_ << ",\"control\":" << (NodeProperties::IsControl(node) ? "true"
                                                                : "false");
+    os_ << ",\"opinfo\":\"" << node->op()->ValueInputCount() << " v "

[danno, 2016/08/09 13:53:49]

how about using a JSON object for these and making them all 2-character:

{ vi: 5, ei: 2, ci:1, vo: 1 ... }

+        << node->op()->EffectInputCount() << " eff "
+        << node->op()->ControlInputCount() << " ctrl in, "
+        << node->op()->ValueOutputCount() << " v "
+        << node->op()->EffectOutputCount() << " eff "
+        << node->op()->ControlOutputCount() << " ctrl out\"";
     if (NodeProperties::IsTyped(node)) {
       Type* type = NodeProperties::GetType(node);
       std::ostringstream type_out;