MIPS: Turn the NumberToStringStub into a hydrogen stub.

src/mips/code-stubs-mips.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 42 matching lines @@
 void ToNumberStub::InitializeInterfaceDescriptor(
     Isolate* isolate,
     CodeStubInterfaceDescriptor* descriptor) {
   static Register registers[] = { a0 };
   descriptor->register_param_count_ = 1;
   descriptor->register_params_ = registers;
   descriptor->deoptimization_handler_ = NULL;
 }
 
 
+void NumberToStringStub::InitializeInterfaceDescriptor(
+    Isolate* isolate,
+    CodeStubInterfaceDescriptor* descriptor) {
+  static Register registers[] = { a0 };
+  descriptor->register_param_count_ = 1;
+  descriptor->register_params_ = registers;
+  descriptor->deoptimization_handler_ = NULL;
+}
+
+
 void FastCloneShallowArrayStub::InitializeInterfaceDescriptor(
     Isolate* isolate,
     CodeStubInterfaceDescriptor* descriptor) {
   static Register registers[] = { a3, a2, a1 };
   descriptor->register_param_count_ = 3;
   descriptor->register_params_ = registers;
   descriptor->deoptimization_handler_ =
       Runtime::FunctionForId(Runtime::kCreateArrayLiteralShallow)->entry;
 }
 
@@ skipping 914 matching lines @@
   __ lw(a3, FieldMemOperand(lhs, HeapObject::kMapOffset));
   __ lbu(a2, FieldMemOperand(a2, Map::kBitFieldOffset));
   __ lbu(a3, FieldMemOperand(a3, Map::kBitFieldOffset));
   __ and_(a0, a2, a3);
   __ And(a0, a0, Operand(1 << Map::kIsUndetectable));
   __ Ret(USE_DELAY_SLOT);
   __ xori(v0, a0, 1 << Map::kIsUndetectable);
 }
 
 
-void NumberToStringStub::Generate(MacroAssembler* masm) {
-  Label runtime;
-
-  __ lw(a1, MemOperand(sp, 0));
-
-  // Generate code to lookup number in the number string cache.
-  __ LookupNumberStringCache(a1, v0, a2, a3, t0, &runtime);
-  __ DropAndRet(1);
-
-  __ bind(&runtime);
-  // Handle number to string in the runtime system if not found in the cache.
-  __ TailCallRuntime(Runtime::kNumberToString, 1, 1);
-}
-
-
 static void ICCompareStub_CheckInputType(MacroAssembler* masm,
                                          Register input,
                                          Register scratch,
                                          CompareIC::State expected,
                                          Label* fail) {
   Label ok;
   if (expected == CompareIC::SMI) {
     __ JumpIfNotSmi(input, fail);
   } else if (expected == CompareIC::NUMBER) {
     __ JumpIfSmi(input, &ok);
@@ skipping 6168 matching lines @@
   __ bind(&fast_elements_case);
   GenerateCase(masm, FAST_ELEMENTS);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_MIPS