jdk8-mips64-public/hotspot: src/share/vm/opto/multnode.hpp@69ea58782b1a

8054054: 8040121 is broken
Summary: C++ code pattern from 8040121 is incorrect
Reviewed-by: kvn

     1 /*

     2  * Copyright (c) 1997, 2013, 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  */

    25 #ifndef SHARE_VM_OPTO_MULTNODE_HPP

    26 #define SHARE_VM_OPTO_MULTNODE_HPP

    28 #include "opto/node.hpp"

    30 class Matcher;

    31 class ProjNode;

    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:

    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;

    43   virtual bool       is_CFG() const { return true; }

    44   virtual uint hash() const { return NO_HASH; }  // CFG nodes do not hash

    45   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 );

    48   virtual uint ideal_reg() const { return NotAMachineReg; }

    49   ProjNode* proj_out(uint which_proj) const; // Get a named projection

    51 };

    53 //------------------------------ProjNode---------------------------------------

    54 // This class defines a Projection node.  Projections project a single element

    55 // out of a tuple (or Signature) type.  Only MultiNodes produce TypeTuple

    56 // results.

    57 class ProjNode : public Node {

    58 protected:

    59   virtual uint hash() const;

    60   virtual uint cmp( const Node &n ) const;

    61   virtual uint size_of() const;

    62   void check_con() const;       // Called from constructor.

    63   const Type* proj_type(const Type* t) const;

    65 public:

    66   ProjNode( Node *src, uint con, bool io_use = false )

    67     : Node( src ), _con(con), _is_io_use(io_use)

    68   {

    69     init_class_id(Class_Proj);

    70     // Optimistic setting. Need additional checks in Node::is_dead_loop_safe().

    71     if (con != TypeFunc::Memory || src->is_Start())

    72       init_flags(Flag_is_dead_loop_safe);

    73     debug_only(check_con());

    74   }

    75   const uint _con;              // The field in the tuple we are projecting

    76   const bool _is_io_use;        // Used to distinguish between the projections

    77                                 // used on the control and io paths from a macro node

    78   virtual int Opcode() const;

    79   virtual bool      is_CFG() const;

    80   virtual bool depends_only_on_test() const { return false; }

    81   virtual const Type *bottom_type() const;

    82   virtual const TypePtr *adr_type() const;

    83   virtual bool pinned() const;

    84   virtual const Type *Value( PhaseTransform *phase ) const;

    85   virtual uint ideal_reg() const;

    86   virtual const RegMask &out_RegMask() const;

    88 #ifndef PRODUCT

    89   virtual void dump_spec(outputStream *st) const;

    90 #endif

    92   // Return true if proj is for "proj->[region->..]call_uct"

    93   bool is_uncommon_trap_proj(Deoptimization::DeoptReason reason);

    94   // Return true for    "if(test)-> proj -> ...

    95   //                          |

    96   //                          V

    97   //                      other_proj->[region->..]call_uct"

    98   bool is_uncommon_trap_if_pattern(Deoptimization::DeoptReason reason);

    99 };

   101 #endif // SHARE_VM_OPTO_MULTNODE_HPP

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