Implement inlined object allocation in Crankshaft.

src/hydrogen.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 5872 matching lines @@
       expr->IsMonomorphic() &&
       IsAllocationInlineable(expr->target())) {
     // The constructor function is on the stack in the unoptimized code
     // during evaluation of the arguments.
     CHECK_ALIVE(VisitForValue(expr->expression()));
     HValue* function = Top();
     CHECK_ALIVE(VisitExpressions(expr->arguments()));
     Handle<JSFunction> constructor = expr->target();
     AddInstruction(new(zone()) HCheckFunction(function, constructor));
 
+    // Force completion of inobject slack tracking before generating
+    // allocation code to finalize instance size.
+    if (constructor->shared()->IsInobjectSlackTrackingInProgress()) {
+      constructor->shared()->CompleteInobjectSlackTracking();
+    }
+
     // Replace the constructor function with a newly allocated receiver.
     HInstruction* receiver = new(zone()) HAllocateObject(context, constructor);
     // Index of the receiver from the top of the expression stack.
     const int receiver_index = argument_count - 1;
     AddInstruction(receiver);
     ASSERT(environment()->ExpressionStackAt(receiver_index) == function);
     environment()->SetExpressionStackAt(receiver_index, receiver);
 
     if (TryInlineConstruct(expr, receiver)) return;
 
@@ skipping 2116 matching lines @@
     }
   }
 
 #ifdef DEBUG
   if (graph_ != NULL) graph_->Verify(false);  // No full verify.
   if (allocator_ != NULL) allocator_->Verify();
 #endif
 }
 
 } }  // namespace v8::internal