Make TurboFan inlining work without deoptimization.

src/compiler/js-inlining.cc

 // Copyright 2014 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/ast.h"
 #include "src/ast-numbering.h"
 #include "src/compiler/access-builder.h"
 #include "src/compiler/ast-graph-builder.h"
 #include "src/compiler/common-operator.h"
 #include "src/compiler/generic-node-inl.h"
@@ skipping 387 matching lines @@
 
   AstGraphBuilder graph_builder(local_zone_, &info, &jsgraph);
   graph_builder.CreateGraph();
   Inlinee::UnifyReturn(&jsgraph);
 
   CopyVisitor visitor(&graph, jsgraph_->graph(), info.zone());
   visitor.CopyGraph();
 
   Inlinee inlinee(visitor.GetCopy(graph.start()), visitor.GetCopy(graph.end()));
 
-  Node* outer_frame_state = call.frame_state();
-  // Insert argument adaptor frame if required.
-  if (call.formal_arguments() != inlinee.formal_parameters()) {
-    outer_frame_state =
-        CreateArgumentsAdaptorFrameState(&call, function, info.zone());
-  }
+  if (FLAG_turbo_deoptimization) {
+    Node* outer_frame_state = call.frame_state();
+    // Insert argument adaptor frame if required.
+    if (call.formal_arguments() != inlinee.formal_parameters()) {
+      outer_frame_state =
+          CreateArgumentsAdaptorFrameState(&call, function, info.zone());
+    }
 
-  for (NodeVectorConstIter it = visitor.copies().begin();
-       it != visitor.copies().end(); ++it) {
-    Node* node = *it;
-    if (node != NULL && node->opcode() == IrOpcode::kFrameState) {
-      AddClosureToFrameState(node, function);
-      NodeProperties::ReplaceFrameStateInput(node, outer_frame_state);
+    for (NodeVectorConstIter it = visitor.copies().begin();
+         it != visitor.copies().end(); ++it) {
+      Node* node = *it;
+      if (node != NULL && node->opcode() == IrOpcode::kFrameState) {
+        AddClosureToFrameState(node, function);
+        NodeProperties::ReplaceFrameStateInput(node, outer_frame_state);
+      }
     }
   }
 
   inlinee.InlineAtCall(jsgraph_, call_node);
 }
 
 
 class JSCallRuntimeAccessor {
  public:
   explicit JSCallRuntimeAccessor(Node* call) : call_(call) {
@@ skipping 54 matching lines @@
              info_->shared_info()->DebugName()->ToCString().get());
     }
     NodeProperties::ReplaceWithValue(call_node, r.first, r.second);
     call_node->RemoveAllInputs();
     DCHECK_EQ(0, call_node->UseCount());
   }
 }
 }
 }
 }  // namespace v8::internal::compiler