[stubs] Migrate ToLengthStub to TurboFan.

src/arm/code-stubs-arm.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_ARM
 
 #include "src/code-stubs.h"
 #include "src/api-arguments.h"
 #include "src/base/bits.h"
 #include "src/bootstrapper.h"
@@ skipping 2676 matching lines @@
   __ tst(r2, Operand(String::kContainsCachedArrayIndexMask));
   __ b(ne, &runtime);
   __ IndexFromHash(r2, r0);
   __ Ret();
 
   __ bind(&runtime);
   __ Push(r0);  // Push argument.
   __ TailCallRuntime(Runtime::kStringToNumber);
 }
 
-void ToLengthStub::Generate(MacroAssembler* masm) {
-  // The ToLength stub takes one argument in r0.
-  Label not_smi;
-  __ JumpIfNotSmi(r0, &not_smi);
-  STATIC_ASSERT(kSmiTag == 0);
-  __ tst(r0, r0);
-  __ mov(r0, Operand(0), LeaveCC, lt);
-  __ Ret();
-  __ bind(&not_smi);
-
-  __ push(r0);  // Push argument.
-  __ TailCallRuntime(Runtime::kToLength);
-}
-
-
 void ToStringStub::Generate(MacroAssembler* masm) {
   // The ToString stub takes one argument in r0.
   Label is_number;
   __ JumpIfSmi(r0, &is_number);
 
   __ CompareObjectType(r0, r1, r1, FIRST_NONSTRING_TYPE);
   // r0: receiver
   // r1: receiver instance type
   __ Ret(lo);
 
@@ skipping 2845 matching lines @@
                            kStackUnwindSpace, NULL, return_value_operand, NULL);
 }
 
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM