Fix fun.apply(receiver, arguments) optimization.

src/hydrogen.cc

 // Copyright 2011 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 4744 matching lines @@
   }
   return false;
 }
 
 
 bool HGraphBuilder::TryCallApply(Call* expr) {
   Expression* callee = expr->expression();
   Property* prop = callee->AsProperty();
   ASSERT(prop != NULL);
 
+  if (!expr->IsMonomorphic() || expr->check_type() != RECEIVER_MAP_CHECK) {
+    return false;
+  }
+  Handle<Map> function_map = expr->GetReceiverTypes()->first();
+  if (function_map->instance_type() != JS_FUNCTION_TYPE ||
+      !expr->target()->shared()->HasBuiltinFunctionId() ||
+      expr->target()->shared()->builtin_function_id() != kFunctionApply) {
+    return false;
+  }
+
   if (info()->scope()->arguments() == NULL) return false;
 
-  Handle<String> name = prop->key()->AsLiteral()->AsPropertyName();
-  if (!name->IsEqualTo(CStrVector("apply"))) return false;
-
   ZoneList<Expression*>* args = expr->arguments();
   if (args->length() != 2) return false;
 
   VariableProxy* arg_two = args->at(1)->AsVariableProxy();
   if (arg_two == NULL || !arg_two->var()->IsStackAllocated()) return false;
   HValue* arg_two_value = environment()->Lookup(arg_two->var());
   if (!arg_two_value->CheckFlag(HValue::kIsArguments)) return false;
 
-  if (!expr->IsMonomorphic() ||
-      expr->check_type() != RECEIVER_MAP_CHECK) return false;
-
   // Our implementation of arguments (based on this stack frame or an
   // adapter below it) does not work for inlined functions.
   if (function_state()->outer() != NULL) {
     Bailout("Function.prototype.apply optimization in inlined function");
     return true;
   }
 
   // Found pattern f.apply(receiver, arguments).
   VisitForValue(prop->obj());
   if (HasStackOverflow() || current_block() == NULL) return true;
   HValue* function = Pop();
   VisitForValue(args->at(0));
   if (HasStackOverflow() || current_block() == NULL) return true;
   HValue* receiver = Pop();
   HInstruction* elements = AddInstruction(new(zone()) HArgumentsElements);
   HInstruction* length = AddInstruction(new(zone()) HArgumentsLength(elements));
-  AddCheckConstantFunction(expr,
-                           function,
-                           expr->GetReceiverTypes()->first(),
-                           true);
+  AddCheckConstantFunction(expr, function, function_map, true);
   HInstruction* result =
       new(zone()) HApplyArguments(function, receiver, length, elements);
   result->set_position(expr->position());
   ast_context()->ReturnInstruction(result, expr->id());
   return true;
 }
 
 
 void HGraphBuilder::VisitCall(Call* expr) {
   ASSERT(!HasStackOverflow());
@@ skipping 1935 matching lines @@
     }
   }
 
 #ifdef DEBUG
   if (graph_ != NULL) graph_->Verify();
   if (allocator_ != NULL) allocator_->Verify();
 #endif
 }
 
 } }  // namespace v8::internal