[builtins] Migrate StringToNumber to TurboFan builtin.

src/builtins/arm64/builtins-arm64.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_ARM64
 
 #include "src/arm64/frames-arm64.h"
 #include "src/codegen.h"
 #include "src/debug/debug.h"
 #include "src/deoptimizer.h"
@@ skipping 2829 matching lines @@
   //  -- x1 : message_id as Smi
   //  -- lr : return address
   // -----------------------------------
   MacroAssembler::NoUseRealAbortsScope no_use_real_aborts(masm);
   __ Push(x1);
   __ Move(cp, Smi::FromInt(0));
   __ TailCallRuntime(Runtime::kAbort);
 }
 
 // static
-void Builtins::Generate_StringToNumber(MacroAssembler* masm) {
-  // The StringToNumber stub takes one argument in x0.
-  __ AssertString(x0);
-
-  // Check if string has a cached array index.
-  Label runtime;
-  __ Ldr(x2, FieldMemOperand(x0, String::kHashFieldOffset));
-  __ Tst(x2, Operand(String::kContainsCachedArrayIndexMask));
-  __ B(ne, &runtime);
-  __ IndexFromHash(x2, x0);
-  __ Ret();
-
-  __ Bind(&runtime);
-  {
-    FrameScope frame(masm, StackFrame::INTERNAL);
-    // Push argument.
-    __ Push(x0);
-    // We cannot use a tail call here because this builtin can also be called
-    // from wasm.
-    __ CallRuntime(Runtime::kStringToNumber);
-  }
-  __ Ret();
-}
-
-// static
 void Builtins::Generate_ToNumber(MacroAssembler* masm) {
   // The ToNumber stub takes one argument in x0.
   Label not_smi;
   __ JumpIfNotSmi(x0, &not_smi);
   __ Ret();
   __ Bind(&not_smi);
 
   Label not_heap_number;
   __ CompareObjectType(x0, x1, x1, HEAP_NUMBER_TYPE);
   // x0: receiver
@@ skipping 150 matching lines @@
     __ Unreachable();
   }
 }
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM