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/*
* Copyright (c) 2014, 2019, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
#ifndef SHARE_OPTO_NARROWPTRNODE_HPP
#define SHARE_OPTO_NARROWPTRNODE_HPP
#include "opto/node.hpp"
#include "opto/opcodes.hpp"
//------------------------------EncodeNarrowPtr--------------------------------
class EncodeNarrowPtrNode : public TypeNode {
protected:
EncodeNarrowPtrNode(Node* value, const Type* type):
TypeNode(type, 2) {
init_class_id(Class_EncodeNarrowPtr);
init_req(0, NULL);
init_req(1, value);
}
public:
virtual uint ideal_reg() const { return Op_RegN; }
};
//------------------------------EncodeP--------------------------------
// Encodes an oop pointers into its compressed form
// Takes an extra argument which is the real heap base as a long which
// may be useful for code generation in the backend.
class EncodePNode : public EncodeNarrowPtrNode {
public:
EncodePNode(Node* value, const Type* type):
EncodeNarrowPtrNode(value, type) {
init_class_id(Class_EncodeP);
}
virtual int Opcode() const;
virtual Node* Identity(PhaseGVN* phase);
virtual const Type* Value(PhaseGVN* phase) const;
};
//------------------------------EncodePKlass--------------------------------
// Encodes a klass pointer into its compressed form
// Takes an extra argument which is the real heap base as a long which
// may be useful for code generation in the backend.
class EncodePKlassNode : public EncodeNarrowPtrNode {
public:
EncodePKlassNode(Node* value, const Type* type):
EncodeNarrowPtrNode(value, type) {
init_class_id(Class_EncodePKlass);
}
virtual int Opcode() const;
virtual Node* Identity(PhaseGVN* phase);
virtual const Type* Value(PhaseGVN* phase) const;
};
//------------------------------DecodeNarrowPtr--------------------------------
class DecodeNarrowPtrNode : public TypeNode {
protected:
DecodeNarrowPtrNode(Node* value, const Type* type):
TypeNode(type, 2) {
init_class_id(Class_DecodeNarrowPtr);
init_req(0, NULL);
init_req(1, value);
}
public:
virtual uint ideal_reg() const { return Op_RegP; }
};
//------------------------------DecodeN--------------------------------
// Converts a narrow oop into a real oop ptr.
// Takes an extra argument which is the real heap base as a long which
// may be useful for code generation in the backend.
class DecodeNNode : public DecodeNarrowPtrNode {
public:
DecodeNNode(Node* value, const Type* type):
DecodeNarrowPtrNode(value, type) {
init_class_id(Class_DecodeN);
}
virtual int Opcode() const;
virtual const Type* Value(PhaseGVN* phase) const;
virtual Node* Identity(PhaseGVN* phase);
};
//------------------------------DecodeNKlass--------------------------------
// Converts a narrow klass pointer into a real klass ptr.
// Takes an extra argument which is the real heap base as a long which
// may be useful for code generation in the backend.
class DecodeNKlassNode : public DecodeNarrowPtrNode {
public:
DecodeNKlassNode(Node* value, const Type* type):
DecodeNarrowPtrNode(value, type) {
init_class_id(Class_DecodeNKlass);
}
virtual int Opcode() const;
virtual const Type* Value(PhaseGVN* phase) const;
virtual Node* Identity(PhaseGVN* phase);
};
#endif // SHARE_OPTO_NARROWPTRNODE_HPP
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