[stubs] replaced ToString MacroAssembler Stub with CodeStubAssembler builtin

src/builtins/x64/builtins-x64.cc

 // Copyright 2012 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.
 
 #if V8_TARGET_ARCH_X64
 
 #include "src/code-factory.h"
 #include "src/codegen.h"
 #include "src/deoptimizer.h"
 #include "src/full-codegen/full-codegen.h"
@@ skipping 1986 matching lines @@
   __ bind(&no_arguments);
   {
     __ LoadRoot(rax, Heap::kempty_stringRootIndex);
     __ ret(1 * kPointerSize);
   }
 
   // 3a. Convert rax to a string.
   __ bind(&to_string);
   {
     FrameScope scope(masm, StackFrame::MANUAL);
-    ToStringStub stub(masm->isolate());
     __ EnterBuiltinFrame(rsi, rdi, r8);
-    __ CallStub(&stub);
+    __ Call(masm->isolate()->builtins()->ToString(), RelocInfo::CODE_TARGET);
     __ LeaveBuiltinFrame(rsi, rdi, r8);
   }
   __ jmp(&drop_frame_and_ret, Label::kNear);
 
   // 3b. Convert symbol in rax to a string.
   __ bind(&symbol_descriptive_string);
   {
     __ PopReturnAddressTo(rcx);
     __ SmiToInteger32(r8, r8);
     __ leap(rsp, Operand(rsp, r8, times_pointer_size, kPointerSize));
@@ skipping 46 matching lines @@
 
   // 3. Make sure rbx is a string.
   {
     Label convert, done_convert;
     __ JumpIfSmi(rbx, &convert, Label::kNear);
     __ CmpObjectType(rbx, FIRST_NONSTRING_TYPE, rcx);
     __ j(below, &done_convert);
     __ bind(&convert);
     {
       FrameScope scope(masm, StackFrame::MANUAL);
-      ToStringStub stub(masm->isolate());
       __ EnterBuiltinFrame(rsi, rdi, r8);
       __ Push(rdx);
       __ Move(rax, rbx);
-      __ CallStub(&stub);
+      __ Call(masm->isolate()->builtins()->ToString(), RelocInfo::CODE_TARGET);
       __ Move(rbx, rax);
       __ Pop(rdx);
       __ LeaveBuiltinFrame(rsi, rdi, r8);
     }
     __ bind(&done_convert);
   }
 
   // 4. Check if new target and constructor differ.
   Label drop_frame_and_ret, new_object;
   __ cmpp(rdx, rdi);
@@ skipping 1000 matching lines @@
 void Builtins::Generate_InterpreterOnStackReplacement(MacroAssembler* masm) {
   Generate_OnStackReplacementHelper(masm, true);
 }
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X64