1/*
2 * Copyright (c) 2014, 2019, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25#ifndef SHARE_OPTO_NARROWPTRNODE_HPP
26#define SHARE_OPTO_NARROWPTRNODE_HPP
27
28#include "opto/node.hpp"
29#include "opto/opcodes.hpp"
30
31//------------------------------EncodeNarrowPtr--------------------------------
32class EncodeNarrowPtrNode : public TypeNode {
33 protected:
34 EncodeNarrowPtrNode(Node* value, const Type* type):
35 TypeNode(type, 2) {
36 init_class_id(Class_EncodeNarrowPtr);
37 init_req(0, NULL);
38 init_req(1, value);
39 }
40 public:
41 virtual uint ideal_reg() const { return Op_RegN; }
42};
43
44//------------------------------EncodeP--------------------------------
45// Encodes an oop pointers into its compressed form
46// Takes an extra argument which is the real heap base as a long which
47// may be useful for code generation in the backend.
48class EncodePNode : public EncodeNarrowPtrNode {
49 public:
50 EncodePNode(Node* value, const Type* type):
51 EncodeNarrowPtrNode(value, type) {
52 init_class_id(Class_EncodeP);
53 }
54 virtual int Opcode() const;
55 virtual Node* Identity(PhaseGVN* phase);
56 virtual const Type* Value(PhaseGVN* phase) const;
57};
58
59//------------------------------EncodePKlass--------------------------------
60// Encodes a klass pointer into its compressed form
61// Takes an extra argument which is the real heap base as a long which
62// may be useful for code generation in the backend.
63class EncodePKlassNode : public EncodeNarrowPtrNode {
64 public:
65 EncodePKlassNode(Node* value, const Type* type):
66 EncodeNarrowPtrNode(value, type) {
67 init_class_id(Class_EncodePKlass);
68 }
69 virtual int Opcode() const;
70 virtual Node* Identity(PhaseGVN* phase);
71 virtual const Type* Value(PhaseGVN* phase) const;
72};
73
74//------------------------------DecodeNarrowPtr--------------------------------
75class DecodeNarrowPtrNode : public TypeNode {
76 protected:
77 DecodeNarrowPtrNode(Node* value, const Type* type):
78 TypeNode(type, 2) {
79 init_class_id(Class_DecodeNarrowPtr);
80 init_req(0, NULL);
81 init_req(1, value);
82 }
83 public:
84 virtual uint ideal_reg() const { return Op_RegP; }
85};
86
87//------------------------------DecodeN--------------------------------
88// Converts a narrow oop into a real oop ptr.
89// Takes an extra argument which is the real heap base as a long which
90// may be useful for code generation in the backend.
91class DecodeNNode : public DecodeNarrowPtrNode {
92 public:
93 DecodeNNode(Node* value, const Type* type):
94 DecodeNarrowPtrNode(value, type) {
95 init_class_id(Class_DecodeN);
96 }
97 virtual int Opcode() const;
98 virtual const Type* Value(PhaseGVN* phase) const;
99 virtual Node* Identity(PhaseGVN* phase);
100};
101
102//------------------------------DecodeNKlass--------------------------------
103// Converts a narrow klass pointer into a real klass ptr.
104// Takes an extra argument which is the real heap base as a long which
105// may be useful for code generation in the backend.
106class DecodeNKlassNode : public DecodeNarrowPtrNode {
107 public:
108 DecodeNKlassNode(Node* value, const Type* type):
109 DecodeNarrowPtrNode(value, type) {
110 init_class_id(Class_DecodeNKlass);
111 }
112 virtual int Opcode() const;
113 virtual const Type* Value(PhaseGVN* phase) const;
114 virtual Node* Identity(PhaseGVN* phase);
115};
116
117#endif // SHARE_OPTO_NARROWPTRNODE_HPP
118