[builtins] Simplify String constructor code.

src/mips64/macro-assembler-mips64.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_MIPS_MACRO_ASSEMBLER_MIPS_H_
 #define V8_MIPS_MACRO_ASSEMBLER_MIPS_H_
 
 #include "src/assembler.h"
 #include "src/globals.h"
 #include "src/mips64/assembler-mips64.h"
@@ skipping 236 matching lines @@
                   Condition cond,
                   Register reg,
                   const Operand& op);
 
   // Swap two registers.  If the scratch register is omitted then a slightly
   // less efficient form using xor instead of mov is emitted.
   void Swap(Register reg1, Register reg2, Register scratch = no_reg);
 
   void Call(Label* target);
 
+  void Move(Register dst, Smi* smi) { li(dst, Operand(smi)); }
+
   inline void Move(Register dst, Register src) {
     if (!dst.is(src)) {
       mov(dst, src);
     }
   }
 
   inline void Move(FPURegister dst, FPURegister src) {
     if (!dst.is(src)) {
       mov_d(dst, src);
     }
@@ skipping 1321 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 instance types are sequential one-byte strings and jumps to
   // label if either is not.
   void JumpIfBothInstanceTypesAreNotSequentialOneByte(
       Register first_object_instance_type, Register second_object_instance_type,
       Register scratch1, Register scratch2, Label* failure);
 
   // Check if instance type is sequential one-byte string and jump to label if
   // it is not.
   void JumpIfInstanceTypeIsNotSequentialOneByte(Register type, Register scratch,
                                                 Label* failure);
@@ skipping 214 matching lines @@
 #define CODE_COVERAGE_TOSTRING(x) CODE_COVERAGE_STRINGIFY(x)
 #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_MIPS_MACRO_ASSEMBLER_MIPS_H_