2007-12-01 00:00:00 +00:00
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/*
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2008-07-02 12:55:16 -07:00
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* Copyright 1997-2008 Sun Microsystems, Inc. All Rights Reserved.
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2007-12-01 00:00:00 +00:00
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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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*
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*/
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class Matcher;
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class ProjNode;
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//------------------------------MultiNode--------------------------------------
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// This class defines a MultiNode, a Node which produces many values. The
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// values are wrapped up in a tuple Type, i.e. a TypeTuple.
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class MultiNode : public Node {
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public:
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MultiNode( uint required ) : Node(required) {
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init_class_id(Class_Multi);
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}
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virtual int Opcode() const;
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virtual const Type *bottom_type() const = 0;
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virtual bool is_CFG() const { return true; }
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virtual uint hash() const { return NO_HASH; } // CFG nodes do not hash
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virtual bool depends_only_on_test() const { return false; }
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virtual const RegMask &out_RegMask() const;
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virtual Node *match( const ProjNode *proj, const Matcher *m );
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virtual uint ideal_reg() const { return NotAMachineReg; }
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ProjNode* proj_out(uint which_proj) const; // Get a named projection
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};
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//------------------------------ProjNode---------------------------------------
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// This class defines a Projection node. Projections project a single element
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// out of a tuple (or Signature) type. Only MultiNodes produce TypeTuple
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// results.
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class ProjNode : public Node {
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protected:
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virtual uint hash() const;
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virtual uint cmp( const Node &n ) const;
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virtual uint size_of() const;
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void check_con() const; // Called from constructor.
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public:
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ProjNode( Node *src, uint con, bool io_use = false )
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: Node( src ), _con(con), _is_io_use(io_use)
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{
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init_class_id(Class_Proj);
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2008-04-23 19:09:16 -07:00
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// Optimistic setting. Need additional checks in Node::is_dead_loop_safe().
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if (con != TypeFunc::Memory || src->is_Start())
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init_flags(Flag_is_dead_loop_safe);
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2007-12-01 00:00:00 +00:00
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debug_only(check_con());
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}
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const uint _con; // The field in the tuple we are projecting
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const bool _is_io_use; // Used to distinguish between the projections
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// used on the control and io paths from a macro node
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virtual int Opcode() const;
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virtual bool is_CFG() const;
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virtual bool depends_only_on_test() const { return false; }
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virtual const Type *bottom_type() const;
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virtual const TypePtr *adr_type() const;
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virtual bool pinned() const;
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virtual const Type *Value( PhaseTransform *phase ) const;
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virtual uint ideal_reg() const;
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virtual const RegMask &out_RegMask() const;
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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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