179 lines
6.5 KiB
C++
179 lines
6.5 KiB
C++
/*
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* Copyright (c) 2014, 2019, 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_OPTO_CASTNODE_HPP
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#define SHARE_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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protected:
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// Can this node be removed post CCP or does it carry a required dependency?
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const bool _carry_dependency;
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virtual bool cmp( const Node &n ) const;
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virtual uint size_of() const;
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public:
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ConstraintCastNode(Node *n, const Type *t, bool carry_dependency)
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: TypeNode(t,2), _carry_dependency(carry_dependency) {
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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(PhaseGVN* phase);
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virtual const Type* Value(PhaseGVN* 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 bool depends_only_on_test() const { return !_carry_dependency; }
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bool carry_dependency() const { return _carry_dependency; }
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TypeNode* dominating_cast(PhaseGVN* gvn, PhaseTransform* pt) const;
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static Node* make_cast(int opcode, Node* c, Node *n, const Type *t, bool carry_dependency);
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static Node* make(Node* c, Node *n, const Type *t, BasicType bt);
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virtual bool operates_on(BasicType bt, bool signed_int) const {
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assert(bt == T_INT || bt == T_LONG, "unsupported");
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return false;
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}
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#ifndef PRODUCT
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virtual void dump_spec(outputStream *st) const;
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#endif
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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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protected:
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// Is this node dependent on a range check?
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const bool _range_check_dependency;
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virtual bool cmp(const Node &n) const;
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virtual uint size_of() const;
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public:
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CastIINode(Node* n, const Type* t, bool carry_dependency = false, bool range_check_dependency = false)
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: ConstraintCastNode(n, t, carry_dependency), _range_check_dependency(range_check_dependency) {
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init_class_id(Class_CastII);
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}
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virtual int Opcode() const;
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virtual uint ideal_reg() const { return Op_RegI; }
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virtual Node* Identity(PhaseGVN* phase);
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virtual const Type* Value(PhaseGVN* phase) const;
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virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
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const bool has_range_check() {
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#ifdef _LP64
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return _range_check_dependency;
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#else
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assert(!_range_check_dependency, "Should not have range check dependency");
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return false;
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#endif
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}
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virtual bool operates_on(BasicType bt, bool signed_int) const {
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assert(bt == T_INT || bt == T_LONG, "unsupported");
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return bt == T_INT;
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}
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#ifndef PRODUCT
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virtual void dump_spec(outputStream* st) const;
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#endif
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};
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class CastLLNode: public ConstraintCastNode {
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public:
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CastLLNode(Node* n, const Type* t, bool carry_dependency = false)
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: ConstraintCastNode(n, t, carry_dependency){
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init_class_id(Class_CastLL);
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}
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virtual bool operates_on(BasicType bt, bool signed_int) const {
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assert(bt == T_INT || bt == T_LONG, "unsupported");
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return bt == T_LONG;
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}
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virtual int Opcode() const;
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virtual uint ideal_reg() const { return Op_RegL; }
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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, bool carry_dependency = false)
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: ConstraintCastNode(n, t, carry_dependency) {
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}
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virtual int Opcode() const;
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virtual uint ideal_reg() const { return Op_RegP; }
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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 ConstraintCastNode {
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public:
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CheckCastPPNode(Node *c, Node *n, const Type *t, bool carry_dependency = false)
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: ConstraintCastNode(n, t, carry_dependency) {
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init_class_id(Class_CheckCastPP);
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init_req(0, c);
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}
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virtual Node* Identity(PhaseGVN* phase);
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virtual const Type* Value(PhaseGVN* phase) const;
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virtual int Opcode() const;
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virtual uint ideal_reg() const { return Op_RegP; }
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bool depends_only_on_test() const { return !type()->isa_rawptr() && ConstraintCastNode::depends_only_on_test(); }
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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(PhaseGVN* phase) const;
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virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
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virtual Node* Identity(PhaseGVN* 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(PhaseGVN* phase) const;
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virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
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virtual Node* Identity(PhaseGVN* 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_OPTO_CASTNODE_HPP
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