[turbofan] Hook up the shift code stubs with TurboFan.

src/compiler/instruction-selector.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/compiler/instruction-selector.h"
 
 #include <limits>
 
 #include "src/base/adapters.h"
 #include "src/compiler/instruction-selector-impl.h"
@@ skipping 1589 matching lines @@
   Emit(opcode, output_count, outputs, buffer.instruction_args.size(),
        &buffer.instruction_args.front())
       ->MarkAsCall();
 }
 
 
 void InstructionSelector::VisitTailCall(Node* node) {
   OperandGenerator g(this);
   CallDescriptor const* descriptor = CallDescriptorOf(node->op());
   DCHECK_NE(0, descriptor->flags() & CallDescriptor::kSupportsTailCalls);
-  DCHECK_EQ(0, descriptor->flags() & CallDescriptor::kPatchableCallSite);
-  DCHECK_EQ(0, descriptor->flags() & CallDescriptor::kNeedsNopAfterCall);
 
   // TODO(turbofan): Relax restriction for stack parameters.
 
   int stack_param_delta = 0;
   if (linkage()->GetIncomingDescriptor()->CanTailCall(node,
                                                       &stack_param_delta)) {
     CallBuffer buffer(zone(), descriptor, nullptr);
 
     // Compute InstructionOperands for inputs and outputs.
     CallBufferFlags flags(kCallCodeImmediate | kCallTail);
@@ skipping 194 matching lines @@
   return new (instruction_zone()) FrameStateDescriptor(
       instruction_zone(), state_info.type(), state_info.bailout_id(),
       state_info.state_combine(), parameters, locals, stack,
       state_info.shared_info(), outer_state);
 }
 
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8