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src/share/vm/ci/ciInstance.hpp@b2ee5dc63353 (annotated)

src/share/vm/ci/ciInstance.hpp

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

author

roland

date

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

changeset 5991

b2ee5dc63353

parent 2658

c7f3d0b4570f

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

duke@435	1	/*
never@2658	2	* Copyright (c) 1999, 2011, Oracle and/or its affiliates. All rights reserved.
duke@435	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435	4	*
duke@435	5	* This code is free software; you can redistribute it and/or modify it
duke@435	6	* under the terms of the GNU General Public License version 2 only, as
duke@435	7	* published by the Free Software Foundation.
duke@435	8	*
duke@435	9	* This code is distributed in the hope that it will be useful, but WITHOUT
duke@435	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@435	12	* version 2 for more details (a copy is included in the LICENSE file that
duke@435	13	* accompanied this code).
duke@435	14	*
duke@435	15	* You should have received a copy of the GNU General Public License version
duke@435	16	* 2 along with this work; if not, write to the Free Software Foundation,
duke@435	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435	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.
duke@435	22	*
duke@435	23	*/
duke@435	24
stefank@2314	25	#ifndef SHARE_VM_CI_CIINSTANCE_HPP
stefank@2314	26	#define SHARE_VM_CI_CIINSTANCE_HPP
stefank@2314	27
stefank@2314	28	#include "ci/ciObject.hpp"
stefank@2314	29	#include "oops/instanceOop.hpp"
stefank@2314	30
duke@435	31	// ciInstance
duke@435	32	//
duke@435	33	// This class represents an instanceOop in the HotSpot virtual
duke@435	34	// machine. This is an oop which corresponds to a non-array
duke@435	35	// instance of java.lang.Object.
duke@435	36	class ciInstance : public ciObject {
duke@435	37	CI_PACKAGE_ACCESS
duke@435	38
duke@435	39	protected:
duke@435	40	ciInstance(instanceHandle h_i) : ciObject(h_i) {
duke@435	41	assert(h_i()->is_instance(), "wrong type");
duke@435	42	}
duke@435	43
duke@435	44	ciInstance(ciKlass* klass) : ciObject(klass) {}
duke@435	45
duke@435	46	instanceOop get_instanceOop() { return (instanceOop)get_oop(); }
duke@435	47
duke@435	48	const char* type_string() { return "ciInstance"; }
duke@435	49
duke@435	50	void print_impl(outputStream* st);
duke@435	51
duke@435	52	public:
duke@435	53	// If this object is a java mirror, return the corresponding type.
duke@435	54	// Otherwise, return NULL.
duke@435	55	// (Remember that a java mirror is an instance of java.lang.Class.)
duke@435	56	ciType* java_mirror_type();
duke@435	57
duke@435	58	// What kind of ciObject is this?
duke@435	59	bool is_instance() { return true; }
duke@435	60	bool is_java_object() { return true; }
duke@435	61
duke@435	62	// Constant value of a field.
duke@435	63	ciConstant field_value(ciField* field);
duke@435	64
duke@435	65	// Constant value of a field at the specified offset.
duke@435	66	ciConstant field_value_by_offset(int field_offset);
never@2658	67
never@2658	68	ciKlass* java_lang_Class_klass();
duke@435	69	};
stefank@2314	70
stefank@2314	71	#endif // SHARE_VM_CI_CIINSTANCE_HPP