120 lines
4.5 KiB
C++
120 lines
4.5 KiB
C++
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/*
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* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#ifndef SHARE_VM_OPTO_CASTNODE_HPP
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#define SHARE_VM_OPTO_CASTNODE_HPP
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#include "opto/node.hpp"
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#include "opto/opcodes.hpp"
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//------------------------------ConstraintCastNode-----------------------------
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// cast to a different range
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class ConstraintCastNode: public TypeNode {
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public:
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ConstraintCastNode (Node *n, const Type *t ): TypeNode(t,2) {
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init_class_id(Class_ConstraintCast);
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init_req(1, n);
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}
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virtual Node *Identity( PhaseTransform *phase );
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virtual const Type *Value( PhaseTransform *phase ) const;
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virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
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virtual int Opcode() const;
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virtual uint ideal_reg() const = 0;
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virtual Node *Ideal_DU_postCCP( PhaseCCP * );
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};
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//------------------------------CastIINode-------------------------------------
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// cast integer to integer (different range)
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class CastIINode: public ConstraintCastNode {
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public:
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CastIINode (Node *n, const Type *t ): ConstraintCastNode(n,t) {}
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virtual int Opcode() const;
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virtual uint ideal_reg() const { return Op_RegI; }
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};
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//------------------------------CastPPNode-------------------------------------
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// cast pointer to pointer (different type)
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class CastPPNode: public ConstraintCastNode {
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public:
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CastPPNode (Node *n, const Type *t ): ConstraintCastNode(n, t) {}
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virtual int Opcode() const;
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virtual uint ideal_reg() const { return Op_RegP; }
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virtual Node *Ideal_DU_postCCP( PhaseCCP * );
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};
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//------------------------------CheckCastPPNode--------------------------------
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// for _checkcast, cast pointer to pointer (different type), without JOIN,
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class CheckCastPPNode: public TypeNode {
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public:
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CheckCastPPNode( Node *c, Node *n, const Type *t ) : TypeNode(t,2) {
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init_class_id(Class_CheckCastPP);
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init_req(0, c);
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init_req(1, n);
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}
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virtual Node *Identity( PhaseTransform *phase );
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virtual const Type *Value( PhaseTransform *phase ) const;
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virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
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virtual int Opcode() const;
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virtual uint ideal_reg() const { return Op_RegP; }
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// No longer remove CheckCast after CCP as it gives me a place to hang
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// the proper address type - which is required to compute anti-deps.
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//virtual Node *Ideal_DU_postCCP( PhaseCCP * );
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};
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//------------------------------CastX2PNode-------------------------------------
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// convert a machine-pointer-sized integer to a raw pointer
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class CastX2PNode : public Node {
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public:
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CastX2PNode( Node *n ) : Node(NULL, n) {}
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virtual int Opcode() const;
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virtual const Type *Value( PhaseTransform *phase ) const;
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virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
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virtual Node *Identity( PhaseTransform *phase );
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virtual uint ideal_reg() const { return Op_RegP; }
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virtual const Type *bottom_type() const { return TypeRawPtr::BOTTOM; }
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};
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//------------------------------CastP2XNode-------------------------------------
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// Used in both 32-bit and 64-bit land.
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// Used for card-marks and unsafe pointer math.
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class CastP2XNode : public Node {
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public:
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CastP2XNode( Node *ctrl, Node *n ) : Node(ctrl, n) {}
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virtual int Opcode() const;
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virtual const Type *Value( PhaseTransform *phase ) const;
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virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
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virtual Node *Identity( PhaseTransform *phase );
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virtual uint ideal_reg() const { return Op_RegX; }
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virtual const Type *bottom_type() const { return TypeX_X; }
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// Return false to keep node from moving away from an associated card mark.
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virtual bool depends_only_on_test() const { return false; }
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};
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#endif // SHARE_VM_OPTO_CASTNODE_HPP
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