Revert of [turbofan] Add initial support for global specialization.

src/compiler/js-typed-lowering.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/code-factory.h"
 #include "src/compiler/access-builder.h"
 #include "src/compiler/js-graph.h"
 #include "src/compiler/js-typed-lowering.h"
 #include "src/compiler/linkage.h"
 #include "src/compiler/node-matchers.h"
@@ skipping 1383 matching lines @@
   // Check that {function} is actually a JSFunction with the correct arity.
   if (function_type->IsFunction() &&
       function_type->AsFunction()->Arity() == arity) {
     // Check that the {receiver} doesn't need to be wrapped.
     if (receiver_type->Is(Type::ReceiverOrUndefined())) {
       Node* const context = graph()->NewNode(
           simplified()->LoadField(AccessBuilder::ForJSFunctionContext()),
           function, effect, control);
       NodeProperties::ReplaceContextInput(node, context);
       CallDescriptor::Flags flags = CallDescriptor::kNeedsFrameState;
-      if (p.AllowTailCalls()) {
+      if (is_strict(p.language_mode())) {
         flags |= CallDescriptor::kSupportsTailCalls;
       }
       NodeProperties::ChangeOp(node,
                                common()->Call(Linkage::GetJSCallDescriptor(
                                    graph()->zone(), false, 1 + arity, flags)));
       return Changed(node);
     }
   }
   return NoChange();
 }
@@ skipping 415 matching lines @@
 }
 
 
 MachineOperatorBuilder* JSTypedLowering::machine() const {
   return jsgraph()->machine();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8