Revert r14930 and r14935 temporarily.

src/mips/lithium-codegen-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 5275 matching lines @@
   if (!instr->hydrogen()->CanOmitPrototypeChecks()) {
     for (int i = 0; i < prototypes->length(); i++) {
       __ LoadHeapObject(prototype_reg, prototypes->at(i));
       __ lw(map_reg, FieldMemOperand(prototype_reg, HeapObject::kMapOffset));
       DoCheckMapCommon(map_reg, maps->at(i), instr->environment());
     }
   }
 }
 
 
+void LCodeGen::DoAllocateObject(LAllocateObject* instr) {
+  class DeferredAllocateObject: public LDeferredCode {
+   public:
+    DeferredAllocateObject(LCodeGen* codegen, LAllocateObject* instr)
+        : LDeferredCode(codegen), instr_(instr) { }
+    virtual void Generate() { codegen()->DoDeferredAllocateObject(instr_); }
+    virtual LInstruction* instr() { return instr_; }
+   private:
+    LAllocateObject* instr_;
+  };
+
+  DeferredAllocateObject* deferred =
+      new(zone()) DeferredAllocateObject(this, instr);
+
+  Register result = ToRegister(instr->result());
+  Register scratch = ToRegister(instr->temp());
+  Register scratch2 = ToRegister(instr->temp2());
+  Handle<JSFunction> constructor = instr->hydrogen()->constructor();
+  Handle<Map> initial_map = instr->hydrogen()->constructor_initial_map();
+  int instance_size = initial_map->instance_size();
+  ASSERT(initial_map->pre_allocated_property_fields() +
+         initial_map->unused_property_fields() -
+         initial_map->inobject_properties() == 0);
+
+  __ Allocate(instance_size, result, scratch, scratch2, deferred->entry(),
+              TAG_OBJECT);
+
+  __ bind(deferred->exit());
+  if (FLAG_debug_code) {
+    Label is_in_new_space;
+    __ JumpIfInNewSpace(result, scratch, &is_in_new_space);
+    __ Abort("Allocated object is not in new-space");
+    __ bind(&is_in_new_space);
+  }
+
+  // Load the initial map.
+  Register map = scratch;
+  __ LoadHeapObject(map, constructor);
+  __ lw(map, FieldMemOperand(map, JSFunction::kPrototypeOrInitialMapOffset));
+
+  // Initialize map and fields of the newly allocated object.
+  ASSERT(initial_map->instance_type() == JS_OBJECT_TYPE);
+  __ sw(map, FieldMemOperand(result, JSObject::kMapOffset));
+  __ LoadRoot(scratch, Heap::kEmptyFixedArrayRootIndex);
+  __ sw(scratch, FieldMemOperand(result, JSObject::kElementsOffset));
+  __ sw(scratch, FieldMemOperand(result, JSObject::kPropertiesOffset));
+  if (initial_map->inobject_properties() != 0) {
+    __ LoadRoot(scratch, Heap::kUndefinedValueRootIndex);
+    for (int i = 0; i < initial_map->inobject_properties(); i++) {
+      int property_offset = JSObject::kHeaderSize + i * kPointerSize;
+      __ sw(scratch, FieldMemOperand(result, property_offset));
+    }
+  }
+}
+
+
+void LCodeGen::DoDeferredAllocateObject(LAllocateObject* instr) {
+  Register result = ToRegister(instr->result());
+  Handle<Map> initial_map = instr->hydrogen()->constructor_initial_map();
+  int instance_size = initial_map->instance_size();
+
+  // TODO(3095996): Get rid of this. For now, we need to make the
+  // result register contain a valid pointer because it is already
+  // contained in the register pointer map.
+  __ mov(result, zero_reg);
+
+  PushSafepointRegistersScope scope(this, Safepoint::kWithRegisters);
+  __ li(a0, Operand(Smi::FromInt(instance_size)));
+  __ push(a0);
+  CallRuntimeFromDeferred(Runtime::kAllocateInNewSpace, 1, instr);
+  __ StoreToSafepointRegisterSlot(v0, result);
+}
+
+
 void LCodeGen::DoAllocate(LAllocate* instr) {
   class DeferredAllocate: public LDeferredCode {
    public:
     DeferredAllocate(LCodeGen* codegen, LAllocate* instr)
         : LDeferredCode(codegen), instr_(instr) { }
     virtual void Generate() { codegen()->DoDeferredAllocate(instr_); }
     virtual LInstruction* instr() { return instr_; }
    private:
     LAllocate* instr_;
   };
@@ skipping 542 matching lines @@
   __ Subu(scratch, result, scratch);
   __ lw(result, FieldMemOperand(scratch,
                                 FixedArray::kHeaderSize - kPointerSize));
   __ bind(&done);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal