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

src/compiler/arm64/code-generator-arm64.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/code-generator.h"
 
 #include "src/arm64/frames-arm64.h"
 #include "src/arm64/macro-assembler-arm64.h"
 #include "src/ast/scopes.h"
 #include "src/compiler/code-generator-impl.h"
@@ skipping 1818 matching lines @@
   }
 }
 
 
 void CodeGenerator::AssembleJumpTable(Label** targets, size_t target_count) {
   // On 64-bit ARM we emit the jump tables inline.
   UNREACHABLE();
 }
 
 
-void CodeGenerator::AddNopForSmiCodeInlining() { __ movz(xzr, 0); }
-
-
 void CodeGenerator::EnsureSpaceForLazyDeopt() {
   if (!info()->ShouldEnsureSpaceForLazyDeopt()) {
     return;
   }
 
   int space_needed = Deoptimizer::patch_size();
   // Ensure that we have enough space after the previous lazy-bailout
   // instruction for patching the code here.
   intptr_t current_pc = masm()->pc_offset();
 
   if (current_pc < (last_lazy_deopt_pc_ + space_needed)) {
     intptr_t padding_size = last_lazy_deopt_pc_ + space_needed - current_pc;
     DCHECK((padding_size % kInstructionSize) == 0);
     InstructionAccurateScope instruction_accurate(
         masm(), padding_size / kInstructionSize);
 
     while (padding_size > 0) {
       __ nop();
       padding_size -= kInstructionSize;
     }
   }
 }
 
 #undef __
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8