[builtins] Simplify String constructor code.

src/arm/macro-assembler-arm.h

 // 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.
 
 #ifndef V8_ARM_MACRO_ASSEMBLER_ARM_H_
 #define V8_ARM_MACRO_ASSEMBLER_ARM_H_
 
 #include "src/assembler.h"
 #include "src/bailout-reason.h"
 #include "src/frames.h"
@@ skipping 146 matching lines @@
            Condition cond = al);
   void Bfc(Register dst, Register src, int lsb, int width, Condition cond = al);
   void Usat(Register dst, int satpos, const Operand& src,
             Condition cond = al);
 
   void Call(Label* target);
   void Push(Register src) { push(src); }
   void Pop(Register dst) { pop(dst); }
 
   // Register move. May do nothing if the registers are identical.
+  void Move(Register dst, Smi* smi) { mov(dst, Operand(smi)); }
   void Move(Register dst, Handle<Object> value);
   void Move(Register dst, Register src, Condition cond = al);
   void Move(Register dst, const Operand& src, SBit sbit = LeaveCC,
             Condition cond = al) {
     if (!src.is_reg() || !src.rm().is(dst) || sbit != LeaveCC) {
       mov(dst, src, sbit, cond);
     }
   }
   void Move(DwVfpRegister dst, DwVfpRegister src);
 
@@ skipping 1145 matching lines @@
   // HeapNumber utilities
 
   void JumpIfNotHeapNumber(Register object,
                            Register heap_number_map,
                            Register scratch,
                            Label* on_not_heap_number);
 
   // ---------------------------------------------------------------------------
   // String utilities
 
-  // Generate code to do a lookup in the number string cache. If the number in
-  // the register object is found in the cache the generated code falls through
-  // with the result in the result register. The object and the result register
-  // can be the same. If the number is not found in the cache the code jumps to
-  // the label not_found with only the content of register object unchanged.
-  void LookupNumberStringCache(Register object,
-                               Register result,
-                               Register scratch1,
-                               Register scratch2,
-                               Register scratch3,
-                               Label* not_found);
-
   // Checks if both objects are sequential one-byte strings and jumps to label
   // if either is not. Assumes that neither object is a smi.
   void JumpIfNonSmisNotBothSequentialOneByteStrings(Register object1,
                                                     Register object2,
                                                     Register scratch1,
                                                     Register scratch2,
                                                     Label* failure);
 
   // Checks if both objects are sequential one-byte strings and jumps to label
   // if either is not.
@@ skipping 214 matching lines @@
 #define __FILE_LINE__ __FILE__ ":" CODE_COVERAGE_TOSTRING(__LINE__)
 #define ACCESS_MASM(masm) masm->stop(__FILE_LINE__); masm->
 #else
 #define ACCESS_MASM(masm) masm->
 #endif
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_ARM_MACRO_ASSEMBLER_ARM_H_