[turbofan] Add initial support for SOFT deopts.

src/compiler/js-native-context-specialization.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/js-native-context-specialization.h"
 
 #include "src/accessors.h"
 #include "src/code-factory.h"
 #include "src/compilation-dependencies.h"
 #include "src/compiler/access-builder.h"
@@ skipping 393 matching lines @@
   // type checks failed, or one of the assumptions inside one of the cases
   // failes (i.e. failing prototype chain check).
   // TODO(bmeurer): Consider falling back to IC here if deoptimization is
   // disabled.
   int const exit_control_count = static_cast<int>(exit_controls.size());
   Node* exit_control =
       (exit_control_count == 1)
           ? exit_controls.front()
           : graph()->NewNode(common()->Merge(exit_control_count),
                              exit_control_count, &exit_controls.front());
-  Node* deoptimize = graph()->NewNode(common()->Deoptimize(), frame_state,
-                                      exit_effect, exit_control);
+  Node* deoptimize =
+      graph()->NewNode(common()->Deoptimize(DeoptimizeKind::kEager),
+                       frame_state, exit_effect, exit_control);
   // TODO(bmeurer): This should be on the AdvancedReducer somehow.
   NodeProperties::MergeControlToEnd(graph(), common(), deoptimize);
 
   // Generate the final merge point for all (polymorphic) branches.
   int const control_count = static_cast<int>(controls.size());
   if (control_count == 0) {
     value = effect = control = jsgraph()->Dead();
   } else if (control_count == 1) {
     value = values.front();
     effect = effects.front();
@@ skipping 405 matching lines @@
   // type checks failed, or one of the assumptions inside one of the cases
   // failes (i.e. failing prototype chain check).
   // TODO(bmeurer): Consider falling back to IC here if deoptimization is
   // disabled.
   int const exit_control_count = static_cast<int>(exit_controls.size());
   Node* exit_control =
       (exit_control_count == 1)
           ? exit_controls.front()
           : graph()->NewNode(common()->Merge(exit_control_count),
                              exit_control_count, &exit_controls.front());
-  Node* deoptimize = graph()->NewNode(common()->Deoptimize(), frame_state,
-                                      exit_effect, exit_control);
+  Node* deoptimize =
+      graph()->NewNode(common()->Deoptimize(DeoptimizeKind::kEager),
+                       frame_state, exit_effect, exit_control);
   // TODO(bmeurer): This should be on the AdvancedReducer somehow.
   NodeProperties::MergeControlToEnd(graph(), common(), deoptimize);
 
   // Generate the final merge point for all (polymorphic) branches.
   int const control_count = static_cast<int>(controls.size());
   if (control_count == 0) {
     value = effect = control = jsgraph()->Dead();
   } else if (control_count == 1) {
     value = values.front();
     effect = effects.front();
@@ skipping 162 matching lines @@
 }
 
 
 SimplifiedOperatorBuilder* JSNativeContextSpecialization::simplified() const {
   return jsgraph()->simplified();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8