Ensure HAllocateObject always allocates in new-space.

src/x64/lithium-codegen-x64.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 4062 matching lines @@
   // the constructor's prototype changes, but instance size and property
   // counts remain unchanged (if slack tracking finished).
   ASSERT(!constructor->shared()->IsInobjectSlackTrackingInProgress());
   __ AllocateInNewSpace(instance_size,
                         result,
                         no_reg,
                         scratch,
                         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(scratch, constructor);
   __ movq(map, FieldOperand(scratch, JSFunction::kPrototypeOrInitialMapOffset));
 
   if (FLAG_debug_code) {
     __ AbortIfSmi(map);
     __ cmpb(FieldOperand(map, Map::kInstanceSizeOffset),
             Immediate(instance_size >> kPointerSizeLog2));
     __ Assert(equal, "Unexpected instance size");
@@ skipping 14 matching lines @@
   __ LoadRoot(scratch, Heap::kEmptyFixedArrayRootIndex);
   __ movq(FieldOperand(result, JSObject::kElementsOffset), scratch);
   __ movq(FieldOperand(result, JSObject::kPropertiesOffset), scratch);
   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;
       __ movq(FieldOperand(result, property_offset), scratch);
     }
   }
-
-  __ bind(deferred->exit());
 }
 
 
 void LCodeGen::DoDeferredAllocateObject(LAllocateObject* instr) {
   Register result = ToRegister(instr->result());
   Handle<JSFunction> constructor = instr->hydrogen()->constructor();
+  Handle<Map> initial_map(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.
   __ Set(result, 0);
 
   PushSafepointRegistersScope scope(this);
-  __ PushHeapObject(constructor);
-  CallRuntimeFromDeferred(Runtime::kNewObject, 1, instr);
+  __ Push(Smi::FromInt(instance_size));
+  CallRuntimeFromDeferred(Runtime::kAllocateInNewSpace, 1, instr);
   __ StoreToSafepointRegisterSlot(result, rax);
 }
 
 
 void LCodeGen::DoArrayLiteral(LArrayLiteral* instr) {
   Heap* heap = isolate()->heap();
   ElementsKind boilerplate_elements_kind =
       instr->hydrogen()->boilerplate_elements_kind();
 
   // Deopt if the array literal boilerplate ElementsKind is of a type different
@@ skipping 619 matching lines @@
                                FixedArray::kHeaderSize - kPointerSize));
   __ bind(&done);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64