[turbolizer] Visualize also the dead nodes.

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 95 matching lines @@
   }
 
   const std::string str_;
   const char* const escaped_chars_;
 };
 
 class JSONGraphNodeWriter {
  public:
   JSONGraphNodeWriter(std::ostream& os, Zone* zone, const Graph* graph,
                       const SourcePositionTable* positions)
-      : os_(os), all_(zone, graph), positions_(positions), first_node_(true) {}
+      : os_(os),
+        all_(zone, graph, false),
+        live_(zone, graph, true),
+        positions_(positions),
+        first_node_(true) {}
 
   void Print() {
-    for (Node* const node : all_.live) PrintNode(node);
+    for (Node* const node : all_.reachable) PrintNode(node);
     os_ << "\n";
   }
 
   void PrintNode(Node* node) {
     if (first_node_) {
       first_node_ = false;
     } else {
       os_ << ",\n";
     }
     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, "\"") << "\""
+        << ",\"live\": " << (live_.IsLive(node) ? "true" : "false")
         << ",\"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)
@@ skipping 20 matching lines @@
       std::ostringstream type_out;
       type->PrintTo(type_out);
       os_ << ",\"type\":\"" << Escaped(type_out, "\"") << "\"";
     }
     os_ << "}";
   }
 
  private:
   std::ostream& os_;
   AllNodes all_;
+  AllNodes live_;
   const SourcePositionTable* positions_;
   bool first_node_;
 
   DISALLOW_COPY_AND_ASSIGN(JSONGraphNodeWriter);
 };
 
 
 class JSONGraphEdgeWriter {
  public:
   JSONGraphEdgeWriter(std::ostream& os, Zone* zone, const Graph* graph)
-      : os_(os), all_(zone, graph), first_edge_(true) {}
+      : os_(os), all_(zone, graph, false), first_edge_(true) {}
 
   void Print() {
-    for (Node* const node : all_.live) PrintEdges(node);
+    for (Node* const node : all_.reachable) PrintEdges(node);
     os_ << "\n";
   }
 
   void PrintEdges(Node* node) {
     for (int i = 0; i < node->InputCount(); i++) {
       Node* input = node->InputAt(i);
       if (input == nullptr) continue;
       PrintEdge(node, i, input);
     }
   }
@@ skipping 501 matching lines @@
         os << "]";
       }
       os << std::endl;
     }
   }
   return os;
 }
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8