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1 /* |
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2 * Copyright (c) 1997, 2015, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
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22 * |
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23 */ |
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24 |
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25 #ifndef SHARE_VM_OPTO_MULTNODE_HPP |
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26 #define SHARE_VM_OPTO_MULTNODE_HPP |
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27 |
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28 #include "opto/node.hpp" |
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29 |
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30 class Matcher; |
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31 class ProjNode; |
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32 |
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33 //------------------------------MultiNode-------------------------------------- |
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34 // This class defines a MultiNode, a Node which produces many values. The |
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35 // values are wrapped up in a tuple Type, i.e. a TypeTuple. |
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36 class MultiNode : public Node { |
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37 public: |
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38 MultiNode( uint required ) : Node(required) { |
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39 init_class_id(Class_Multi); |
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40 } |
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41 virtual int Opcode() const; |
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42 virtual const Type *bottom_type() const = 0; |
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43 virtual bool is_CFG() const { return true; } |
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44 virtual uint hash() const { return NO_HASH; } // CFG nodes do not hash |
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45 virtual bool depends_only_on_test() const { return false; } |
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46 virtual const RegMask &out_RegMask() const; |
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47 virtual Node *match( const ProjNode *proj, const Matcher *m ); |
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48 virtual uint ideal_reg() const { return NotAMachineReg; } |
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49 ProjNode* proj_out(uint which_proj) const; // Get a named projection |
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50 |
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51 }; |
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52 |
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53 //------------------------------ProjNode--------------------------------------- |
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54 // This class defines a Projection node. Projections project a single element |
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55 // out of a tuple (or Signature) type. Only MultiNodes produce TypeTuple |
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56 // results. |
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57 class ProjNode : public Node { |
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58 protected: |
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59 virtual uint hash() const; |
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60 virtual uint cmp( const Node &n ) const; |
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61 virtual uint size_of() const; |
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62 void check_con() const; // Called from constructor. |
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63 const Type* proj_type(const Type* t) const; |
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64 |
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65 public: |
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66 ProjNode( Node *src, uint con, bool io_use = false ) |
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67 : Node( src ), _con(con), _is_io_use(io_use) |
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68 { |
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69 init_class_id(Class_Proj); |
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70 // Optimistic setting. Need additional checks in Node::is_dead_loop_safe(). |
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71 if (con != TypeFunc::Memory || src->is_Start()) |
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72 init_flags(Flag_is_dead_loop_safe); |
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73 debug_only(check_con()); |
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74 } |
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75 const uint _con; // The field in the tuple we are projecting |
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76 const bool _is_io_use; // Used to distinguish between the projections |
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77 // used on the control and io paths from a macro node |
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78 virtual int Opcode() const; |
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79 virtual bool is_CFG() const; |
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80 virtual bool depends_only_on_test() const { return false; } |
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81 virtual const Type *bottom_type() const; |
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82 virtual const TypePtr *adr_type() const; |
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83 virtual bool pinned() const; |
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84 virtual const Type* Value(PhaseGVN* phase) const; |
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85 virtual uint ideal_reg() const; |
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86 virtual const RegMask &out_RegMask() const; |
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87 |
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88 #ifndef PRODUCT |
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89 virtual void dump_spec(outputStream *st) const; |
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90 virtual void dump_compact_spec(outputStream *st) const; |
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91 #endif |
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92 |
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93 // Return uncommon trap call node if proj is for "proj->[region->..]call_uct" |
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94 // NULL otherwise |
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95 CallStaticJavaNode* is_uncommon_trap_proj(Deoptimization::DeoptReason reason); |
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96 // Return uncommon trap call node for "if(test)-> proj -> ... |
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97 // | |
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98 // V |
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99 // other_proj->[region->..]call_uct" |
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100 // NULL otherwise |
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101 CallStaticJavaNode* is_uncommon_trap_if_pattern(Deoptimization::DeoptReason reason); |
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102 |
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103 // Return other proj node when this is a If proj node |
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104 ProjNode* other_if_proj() const; |
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105 }; |
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106 |
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107 #endif // SHARE_VM_OPTO_MULTNODE_HPP |