MIPS: Fix '[stubs] Split ToNumberStub into reusable subparts.'

src/mips64/code-stubs-mips64.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_MIPS64
 
 #include "src/code-stubs.h"
 #include "src/api-arguments.h"
 #include "src/bootstrapper.h"
 #include "src/codegen.h"
@@ skipping 2806 matching lines @@
 void StringToNumberStub::Generate(MacroAssembler* masm) {
   // The StringToNumber stub takes on argument in a0.
   __ AssertString(a0);
 
   // Check if string has a cached array index.
   Label runtime;
   __ lwu(a2, FieldMemOperand(a0, String::kHashFieldOffset));
   __ And(at, a2, Operand(String::kContainsCachedArrayIndexMask));
   __ Branch(&runtime, ne, at, Operand(zero_reg));
   __ IndexFromHash(a2, v0);
-  __ Ret(USE_DELAY_SLOT);
-  __ mov(v0, a0);  // In delay slot.
+  __ Ret();
 
   __ bind(&runtime);
   __ Push(a0);  // Push argument.
   __ TailCallRuntime(Runtime::kStringToNumber);
 }
 
 void ToLengthStub::Generate(MacroAssembler* masm) {
   // The ToLength stub takes on argument in a0.
   Label not_smi, positive_smi;
   __ JumpIfNotSmi(a0, &not_smi);
@@ skipping 2930 matching lines @@
                            return_value_operand, NULL);
 }
 
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_MIPS64