[builtins] Migrate StringToNumber to TurboFan builtin.

src/builtins/ia32/builtins-ia32.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_IA32
 
 #include "src/code-factory.h"
 #include "src/codegen.h"
 #include "src/deoptimizer.h"
 #include "src/full-codegen/full-codegen.h"
@@ skipping 2696 matching lines @@
   //  -- esp[0] : return address
   // -----------------------------------
   __ PopReturnAddressTo(ecx);
   __ Push(edx);
   __ PushReturnAddressFrom(ecx);
   __ Move(esi, Smi::FromInt(0));
   __ TailCallRuntime(Runtime::kAbort);
 }
 
 // static
-void Builtins::Generate_StringToNumber(MacroAssembler* masm) {
-  // The StringToNumber stub takes one argument in eax.
-  __ AssertString(eax);
-
-  // Check if string has a cached array index.
-  Label runtime;
-  __ test(FieldOperand(eax, String::kHashFieldOffset),
-          Immediate(String::kContainsCachedArrayIndexMask));
-  __ j(not_zero, &runtime, Label::kNear);
-  __ mov(eax, FieldOperand(eax, String::kHashFieldOffset));
-  __ IndexFromHash(eax, eax);
-  __ Ret();
-
-  __ bind(&runtime);
-  {
-    FrameScope frame(masm, StackFrame::INTERNAL);
-    // Push argument.
-    __ push(eax);
-    // 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 eax.
   Label not_smi;
   __ JumpIfNotSmi(eax, &not_smi, Label::kNear);
   __ Ret();
   __ bind(&not_smi);
 
   Label not_heap_number;
   __ CompareMap(eax, masm->isolate()->factory()->heap_number_map());
   __ j(not_equal, &not_heap_number, Label::kNear);
@@ skipping 273 matching lines @@
 
 void Builtins::Generate_InterpreterOnStackReplacement(MacroAssembler* masm) {
   Generate_OnStackReplacementHelper(masm, true);
 }
 
 #undef __
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_IA32