[turbolizer] Show operator properties and arity in tooltip.

src/compiler/graph-visualizer.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/compiler/graph-visualizer.h"
 
 #include <memory>
 #include <sstream>
 #include <string>
 
@@ skipping 108 matching lines @@
     for (Node* const node : all_.live) PrintNode(node);
     os_ << "\n";
   }
 
   void PrintNode(Node* node) {
     if (first_node_) {
       first_node_ = false;
     } 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)
           << "]";
       os_ << ",\"rankWithInput\":[" << NodeProperties::FirstControlIndex(node)
           << "]";
     } else if (opcode == IrOpcode::kIfTrue || opcode == IrOpcode::kIfFalse ||
                opcode == IrOpcode::kLoop) {
       os_ << ",\"rankInputs\":[" << NodeProperties::FirstControlIndex(node)
           << "]";
     }
     if (opcode == IrOpcode::kBranch) {
       os_ << ",\"rankInputs\":[0]";
     }
     SourcePosition position = positions_->GetSourcePosition(node);
     if (position.IsKnown()) {
       os_ << ",\"pos\":" << position.raw();
     }
     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;
       type->PrintTo(type_out);
       os_ << ",\"type\":\"" << Escaped(type_out, "\"") << "\"";
     }
     os_ << "}";
   }
 
  private:
@@ skipping 527 matching lines @@
         os << "]";
       }
       os << std::endl;
     }
   }
   return os;
 }
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8