| /* |
| * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #ifndef SHARE_VM_OPTO_MULTNODE_HPP |
| #define SHARE_VM_OPTO_MULTNODE_HPP |
| |
| #include "opto/node.hpp" |
| |
| class Matcher; |
| class ProjNode; |
| |
| //------------------------------MultiNode-------------------------------------- |
| // This class defines a MultiNode, a Node which produces many values. The |
| // values are wrapped up in a tuple Type, i.e. a TypeTuple. |
| class MultiNode : public Node { |
| public: |
| MultiNode( uint required ) : Node(required) { |
| init_class_id(Class_Multi); |
| } |
| virtual int Opcode() const; |
| virtual const Type *bottom_type() const = 0; |
| virtual bool is_CFG() const { return true; } |
| virtual uint hash() const { return NO_HASH; } // CFG nodes do not hash |
| virtual bool depends_only_on_test() const { return false; } |
| virtual const RegMask &out_RegMask() const; |
| virtual Node *match( const ProjNode *proj, const Matcher *m ); |
| virtual uint ideal_reg() const { return NotAMachineReg; } |
| ProjNode* proj_out(uint which_proj) const; // Get a named projection |
| |
| }; |
| |
| //------------------------------ProjNode--------------------------------------- |
| // This class defines a Projection node. Projections project a single element |
| // out of a tuple (or Signature) type. Only MultiNodes produce TypeTuple |
| // results. |
| class ProjNode : public Node { |
| protected: |
| virtual uint hash() const; |
| virtual uint cmp( const Node &n ) const; |
| virtual uint size_of() const; |
| void check_con() const; // Called from constructor. |
| const Type* proj_type(const Type* t) const; |
| |
| public: |
| ProjNode( Node *src, uint con, bool io_use = false ) |
| : Node( src ), _con(con), _is_io_use(io_use) |
| { |
| init_class_id(Class_Proj); |
| // Optimistic setting. Need additional checks in Node::is_dead_loop_safe(). |
| if (con != TypeFunc::Memory || src->is_Start()) |
| init_flags(Flag_is_dead_loop_safe); |
| debug_only(check_con()); |
| } |
| const uint _con; // The field in the tuple we are projecting |
| const bool _is_io_use; // Used to distinguish between the projections |
| // used on the control and io paths from a macro node |
| virtual int Opcode() const; |
| virtual bool is_CFG() const; |
| virtual bool depends_only_on_test() const { return false; } |
| virtual const Type *bottom_type() const; |
| virtual const TypePtr *adr_type() const; |
| virtual bool pinned() const; |
| virtual const Type* Value(PhaseGVN* phase) const; |
| virtual uint ideal_reg() const; |
| virtual const RegMask &out_RegMask() const; |
| |
| #ifndef PRODUCT |
| virtual void dump_spec(outputStream *st) const; |
| virtual void dump_compact_spec(outputStream *st) const; |
| #endif |
| |
| // Return uncommon trap call node if proj is for "proj->[region->..]call_uct" |
| // NULL otherwise |
| CallStaticJavaNode* is_uncommon_trap_proj(Deoptimization::DeoptReason reason); |
| // Return uncommon trap call node for "if(test)-> proj -> ... |
| // | |
| // V |
| // other_proj->[region->..]call_uct" |
| // NULL otherwise |
| CallStaticJavaNode* is_uncommon_trap_if_pattern(Deoptimization::DeoptReason reason); |
| |
| // Return other proj node when this is a If proj node |
| ProjNode* other_if_proj() const; |
| }; |
| |
| #endif // SHARE_VM_OPTO_MULTNODE_HPP |