[turbofan] First shot at eager deoptimization in Turbofan.

src/compiler/node-properties.cc

 // Copyright 2015 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/node-properties.h"
 
 #include "src/compiler/common-operator.h"
 #include "src/compiler/operator-properties.h"
 
 namespace v8 {
@@ skipping 133 matching lines @@
 }
 
 
 // static
 void NodeProperties::RemoveNonValueInputs(Node* node) {
   node->TrimInputCount(node->op()->ValueInputCount());
 }
 
 
 // static
-void NodeProperties::ReplaceWithValue(Node* node, Node* value, Node* effect) {
+void NodeProperties::ReplaceWithValue(Node* node, Node* value, Node* effect,
+                                      Node* control) {
   if (!effect && node->op()->EffectInputCount() > 0) {
     effect = NodeProperties::GetEffectInput(node);
   }
+  if (control == nullptr && node->op()->ControlInputCount() > 0) {
+    control = NodeProperties::GetControlInput(node);
+  }
 
   // Requires distinguishing between value, effect and control edges.
   for (Edge edge : node->use_edges()) {
     if (IsControlEdge(edge)) {
       DCHECK_EQ(IrOpcode::kIfSuccess, edge.from()->opcode());
-      Node* control = NodeProperties::GetControlInput(node);
+      DCHECK_NOT_NULL(control);
       edge.from()->ReplaceUses(control);
       edge.UpdateTo(NULL);
     } else if (IsEffectEdge(edge)) {
       DCHECK_NOT_NULL(effect);
       edge.UpdateTo(effect);
     } else {
       edge.UpdateTo(value);
     }
   }
 }
@@ skipping 75 matching lines @@
 // static
 bool NodeProperties::IsInputRange(Edge edge, int first, int num) {
   if (num == 0) return false;
   int const index = edge.index();
   return first <= index && index < first + num;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8