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src/share/vm/ci/ciObjArray.cpp@b2ee5dc63353 (annotated)

src/share/vm/ci/ciObjArray.cpp

Wed, 23 Oct 2013 12:40:23 +0200

author

roland

date

Wed, 23 Oct 2013 12:40:23 +0200

changeset 5991

b2ee5dc63353

parent 2314

f95d63e2154a

child 6876

710a3c8b516e

permissions

-rw-r--r--

8024070: C2 needs some form of type speculation
Summary: record unused type profile information with type system, propagate and use it.
Reviewed-by: kvn, twisti

never@452	1	/*
stefank@2314	2	* Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
never@452	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
never@452	4	*
never@452	5	* This code is free software; you can redistribute it and/or modify it
never@452	6	* under the terms of the GNU General Public License version 2 only, as
never@452	7	* published by the Free Software Foundation.
never@452	8	*
never@452	9	* This code is distributed in the hope that it will be useful, but WITHOUT
never@452	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
never@452	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
never@452	12	* version 2 for more details (a copy is included in the LICENSE file that
never@452	13	* accompanied this code).
never@452	14	*
never@452	15	* You should have received a copy of the GNU General Public License version
never@452	16	* 2 along with this work; if not, write to the Free Software Foundation,
never@452	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
never@452	18	*
trims@1907	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907	20	* or visit www.oracle.com if you need additional information or have any
trims@1907	21	* questions.
never@452	22	*
never@452	23	*/
never@452	24
stefank@2314	25	#include "precompiled.hpp"
stefank@2314	26	#include "ci/ciNullObject.hpp"
stefank@2314	27	#include "ci/ciObjArray.hpp"
stefank@2314	28	#include "ci/ciUtilities.hpp"
stefank@2314	29	#include "oops/objArrayOop.hpp"
never@452	30
never@452	31	// ciObjArray
never@452	32	//
never@452	33	// This class represents an objArrayOop in the HotSpot virtual
never@452	34	// machine.
never@452	35
never@452	36	ciObject* ciObjArray::obj_at(int index) {
never@452	37	VM_ENTRY_MARK;
never@452	38	objArrayOop array = get_objArrayOop();
never@452	39	if (index < 0 || index >= array->length()) return NULL;
never@452	40	oop o = array->obj_at(index);
never@452	41	if (o == NULL) {
never@452	42	return ciNullObject::make();
never@452	43	} else {
never@452	44	return CURRENT_ENV->get_object(o);
never@452	45	}
never@452	46	}