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1 /*
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2 * Copyright 1997-2005 Sun Microsystems, Inc. All Rights Reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 class Matcher;
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26 class ProjNode;
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27
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28 //------------------------------MultiNode--------------------------------------
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29 // This class defines a MultiNode, a Node which produces many values. The
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30 // values are wrapped up in a tuple Type, i.e. a TypeTuple.
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31 class MultiNode : public Node {
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32 public:
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33 MultiNode( uint required ) : Node(required) {
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34 init_class_id(Class_Multi);
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35 }
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36 virtual int Opcode() const;
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37 virtual const Type *bottom_type() const = 0;
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38 virtual bool is_CFG() const { return true; }
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39 virtual uint hash() const { return NO_HASH; } // CFG nodes do not hash
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40 virtual bool depends_only_on_test() const { return false; }
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41 virtual const RegMask &out_RegMask() const;
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42 virtual Node *match( const ProjNode *proj, const Matcher *m );
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43 virtual uint ideal_reg() const { return NotAMachineReg; }
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44 ProjNode* proj_out(uint which_proj) const; // Get a named projection
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45
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46 };
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47
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48 //------------------------------ProjNode---------------------------------------
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49 // This class defines a Projection node. Projections project a single element
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50 // out of a tuple (or Signature) type. Only MultiNodes produce TypeTuple
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51 // results.
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52 class ProjNode : public Node {
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53 protected:
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54 virtual uint hash() const;
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55 virtual uint cmp( const Node &n ) const;
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56 virtual uint size_of() const;
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57 void check_con() const; // Called from constructor.
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58
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59 public:
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60 ProjNode( Node *src, uint con, bool io_use = false )
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61 : Node( src ), _con(con), _is_io_use(io_use)
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62 {
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63 init_class_id(Class_Proj);
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64 debug_only(check_con());
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65 }
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66 const uint _con; // The field in the tuple we are projecting
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67 const bool _is_io_use; // Used to distinguish between the projections
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68 // used on the control and io paths from a macro node
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69 virtual int Opcode() const;
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70 virtual bool is_CFG() const;
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71 virtual bool depends_only_on_test() const { return false; }
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72 virtual const Type *bottom_type() const;
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73 virtual const TypePtr *adr_type() const;
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74 virtual bool pinned() const;
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75 virtual const Type *Value( PhaseTransform *phase ) const;
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76 virtual uint ideal_reg() const;
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77 virtual const RegMask &out_RegMask() const;
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78 #ifndef PRODUCT
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79 virtual void dump_spec(outputStream *st) const;
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80 #endif
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81 };
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