1 /* 2 * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #ifndef SHARE_OPTO_MULTNODE_HPP 26 #define SHARE_OPTO_MULTNODE_HPP 27 28 #include "opto/node.hpp" 29 30 class Matcher; 31 class ProjNode; 32 33 //------------------------------MultiNode-------------------------------------- 34 // This class defines a MultiNode, a Node which produces many values. The 35 // values are wrapped up in a tuple Type, i.e. a TypeTuple. 36 class MultiNode : public Node { 37 public: MultiNode(uint required)38 MultiNode( uint required ) : Node(required) { 39 init_class_id(Class_Multi); 40 } 41 virtual int Opcode() const; 42 virtual const Type *bottom_type() const = 0; is_CFG() const43 virtual bool is_CFG() const { return true; } hash() const44 virtual uint hash() const { return NO_HASH; } // CFG nodes do not hash depends_only_on_test() const45 virtual bool depends_only_on_test() const { return false; } 46 virtual const RegMask &out_RegMask() const; 47 virtual Node *match( const ProjNode *proj, const Matcher *m ); ideal_reg() const48 virtual uint ideal_reg() const { return NotAMachineReg; } 49 ProjNode* proj_out(uint which_proj) const; // Get a named projection 50 ProjNode* proj_out_or_null(uint which_proj) const; 51 ProjNode* proj_out_or_null(uint which_proj, bool is_io_use) const; 52 }; 53 54 //------------------------------ProjNode--------------------------------------- 55 // This class defines a Projection node. Projections project a single element 56 // out of a tuple (or Signature) type. Only MultiNodes produce TypeTuple 57 // results. 58 class ProjNode : public Node { 59 protected: 60 virtual uint hash() const; 61 virtual bool cmp( const Node &n ) const; 62 virtual uint size_of() const; 63 void check_con() const; // Called from constructor. 64 const Type* proj_type(const Type* t) const; 65 66 public: ProjNode(Node * src,uint con,bool io_use=false)67 ProjNode( Node *src, uint con, bool io_use = false ) 68 : Node( src ), _con(con), _is_io_use(io_use) 69 { 70 init_class_id(Class_Proj); 71 // Optimistic setting. Need additional checks in Node::is_dead_loop_safe(). 72 if (con != TypeFunc::Memory || src->is_Start()) 73 init_flags(Flag_is_dead_loop_safe); 74 debug_only(check_con()); 75 } 76 const uint _con; // The field in the tuple we are projecting 77 const bool _is_io_use; // Used to distinguish between the projections 78 // used on the control and io paths from a macro node 79 virtual int Opcode() const; 80 virtual bool is_CFG() const; depends_only_on_test() const81 virtual bool depends_only_on_test() const { return false; } 82 virtual const Type *bottom_type() const; 83 virtual const TypePtr *adr_type() const; 84 virtual bool pinned() const; 85 virtual const Type* Value(PhaseGVN* phase) const; 86 virtual uint ideal_reg() const; 87 virtual const RegMask &out_RegMask() const; 88 89 #ifndef PRODUCT 90 virtual void dump_spec(outputStream *st) const; 91 virtual void dump_compact_spec(outputStream *st) const; 92 #endif 93 94 // Return uncommon trap call node if proj is for "proj->[region->..]call_uct" 95 // NULL otherwise 96 CallStaticJavaNode* is_uncommon_trap_proj(Deoptimization::DeoptReason reason); 97 // Return uncommon trap call node for "if(test)-> proj -> ... 98 // | 99 // V 100 // other_proj->[region->..]call_uct" 101 // NULL otherwise 102 CallStaticJavaNode* is_uncommon_trap_if_pattern(Deoptimization::DeoptReason reason); 103 104 // Return other proj node when this is a If proj node 105 ProjNode* other_if_proj() const; 106 }; 107 108 #endif // SHARE_OPTO_MULTNODE_HPP 109