[stubs] StringToNumberStub --> StringToNumber builtin.

src/x64/code-stubs-x64.cc

 // Copyright 2013 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-stubs.h"
 #include "src/api-arguments.h"
 #include "src/bootstrapper.h"
 #include "src/codegen.h"
@@ skipping 2398 matching lines @@
 
 void NonNumberToNumberStub::Generate(MacroAssembler* masm) {
   // The NonNumberToNumber stub takes one argument in rax.
   __ AssertNotNumber(rax);
 
   Label not_string;
   __ CmpObjectType(rax, FIRST_NONSTRING_TYPE, rdi);
   // rax: object
   // rdi: object map
   __ j(above_equal, &not_string, Label::kNear);
-  StringToNumberStub stub(masm->isolate());
-  __ TailCallStub(&stub);
+  __ Jump(isolate()->builtins()->StringToNumber(), RelocInfo::CODE_TARGET);
   __ bind(&not_string);
 
   Label not_oddball;
   __ CmpInstanceType(rdi, ODDBALL_TYPE);
   __ j(not_equal, &not_oddball, Label::kNear);
   __ movp(rax, FieldOperand(rax, Oddball::kToNumberOffset));
   __ Ret();
   __ bind(&not_oddball);
 
   __ PopReturnAddressTo(rcx);     // Pop return address.
   __ Push(rax);                   // Push argument.
   __ PushReturnAddressFrom(rcx);  // Push return address.
   __ TailCallRuntime(Runtime::kToNumber);
 }
 
-void StringToNumberStub::Generate(MacroAssembler* masm) {
-  // The StringToNumber stub takes one argument in rax.
-  __ AssertString(rax);
-
-  // Check if string has a cached array index.
-  Label runtime;
-  __ testl(FieldOperand(rax, String::kHashFieldOffset),
-           Immediate(String::kContainsCachedArrayIndexMask));
-  __ j(not_zero, &runtime, Label::kNear);
-  __ movl(rax, FieldOperand(rax, String::kHashFieldOffset));
-  __ IndexFromHash(rax, rax);
-  __ Ret();
-
-  __ bind(&runtime);
-  __ PopReturnAddressTo(rcx);     // Pop return address.
-  __ Push(rax);                   // Push argument.
-  __ PushReturnAddressFrom(rcx);  // Push return address.
-  __ TailCallRuntime(Runtime::kStringToNumber);
-}
-
 void ToStringStub::Generate(MacroAssembler* masm) {
   // The ToString stub takes one argument in rax.
   Label is_number;
   __ JumpIfSmi(rax, &is_number, Label::kNear);
 
   Label not_string;
   __ CmpObjectType(rax, FIRST_NONSTRING_TYPE, rdi);
   // rax: receiver
   // rdi: receiver map
   __ j(above_equal, &not_string, Label::kNear);
@@ skipping 2980 matching lines @@
                            kStackUnwindSpace, nullptr, return_value_operand,
                            NULL);
 }
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X64