[turbofan] First version of loop peeling.

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 <sstream>
 #include <string>
 
 #include "src/code-stubs.h"
@@ skipping 111 matching lines @@
     if (first_node_) {
       first_node_ = false;
     } else {
       os_ << ",";
     }
     std::ostringstream label;
     label << *node->op();
     os_ << "{\"id\":" << SafeId(node) << ",\"label\":\"" << Escaped(label, "\"")
         << "\"";
     IrOpcode::Value opcode = node->opcode();
-    if (opcode == IrOpcode::kPhi || opcode == IrOpcode::kEffectPhi) {
+    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) {
@@ skipping 175 matching lines @@
     os_ << "|" << Escaped(upper) << "|" << Escaped(lower);
   }
   os_ << "}\"\n";
 
   os_ << "  ]\n";
   if (control_cluster != NULL) os_ << "  }\n";
 }
 
 
 static bool IsLikelyBackEdge(Node* from, int index, Node* to) {
-  if (from->opcode() == IrOpcode::kPhi ||
-      from->opcode() == IrOpcode::kEffectPhi) {
+  if (IrOpcode::IsPhiOpcode(from->opcode())) {
     Node* control = NodeProperties::GetControlInput(from, 0);
     return control != NULL && control->opcode() != IrOpcode::kMerge &&
            control != to && index != 0;
   } else if (from->opcode() == IrOpcode::kLoop) {
     return index != 0;
   } else {
     return false;
   }
 }
 
@@ skipping 485 matching lines @@
         os << "#" << SafeId(i) << ":" << SafeMnemonic(i);
       }
       os << ")" << std::endl;
     }
   }
   return os;
 }
 }
 }
 }  // namespace v8::internal::compiler