1 /*

     2  * Copyright 1999-2006 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    20  * CA 95054 USA or visit www.sun.com if you need additional information or

    21  * have any questions.

    22  *

    23  */

    24 

    25 //------------------------------BoxLockNode------------------------------------

    26 class BoxLockNode : public Node {

    27 public:

    28   const int _slot;

    29   RegMask   _inmask;

    30 

    31   BoxLockNode( int lock );

    32   virtual int Opcode() const;

    33   virtual void emit(CodeBuffer &cbuf, PhaseRegAlloc *ra_) const;

    34   virtual uint size(PhaseRegAlloc *ra_) const;

    35   virtual const RegMask &in_RegMask(uint) const;

    36   virtual const RegMask &out_RegMask() const;

    37   virtual uint size_of() const;

    38   virtual uint hash() const { return Node::hash() + _slot; }

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

    40   virtual const class Type *bottom_type() const { return TypeRawPtr::BOTTOM; }

    41   virtual uint ideal_reg() const { return Op_RegP; }

    42 

    43   static OptoReg::Name stack_slot(Node* box_node);

    44 

    45 #ifndef PRODUCT

    46   virtual void format( PhaseRegAlloc *, outputStream *st ) const;

    47   virtual void dump_spec(outputStream *st) const { st->print("  Lock %d",_slot); }

    48 #endif

    49 };

    50 

    51 //------------------------------FastLockNode-----------------------------------

    52 class FastLockNode: public CmpNode {

    53 private:

    54   BiasedLockingCounters* _counters;

    55 

    56 public:

    57   FastLockNode(Node *ctrl, Node *oop, Node *box) : CmpNode(oop,box) {

    58     init_req(0,ctrl);

    59     init_class_id(Class_FastLock);

    60     _counters = NULL;

    61   }

    62   Node* obj_node() const { return in(1); }

    63   Node* box_node() const { return in(2); }

    64 

    65   // FastLock and FastUnlockNode do not hash, we need one for each correspoding

    66   // LockNode/UnLockNode to avoid creating Phi's.

    67   virtual uint hash() const ;                  // { return NO_HASH; }

    68   virtual uint cmp( const Node &n ) const ;    // Always fail, except on self

    69   virtual int Opcode() const;

    70   virtual const Type *Value( PhaseTransform *phase ) const { return TypeInt::CC; }

    71   const Type *sub(const Type *t1, const Type *t2) const { return TypeInt::CC;}

    72 

    73   void create_lock_counter(JVMState* s);

    74   BiasedLockingCounters* counters() const { return _counters; }

    75 };

    76 

    77 

    78 //------------------------------FastUnlockNode---------------------------------

    79 class FastUnlockNode: public CmpNode {

    80 public:

    81   FastUnlockNode(Node *ctrl, Node *oop, Node *box) : CmpNode(oop,box) {

    82     init_req(0,ctrl);

    83     init_class_id(Class_FastUnlock);

    84   }

    85   Node* obj_node() const { return in(1); }

    86   Node* box_node() const { return in(2); }

    87 

    88 

    89   // FastLock and FastUnlockNode do not hash, we need one for each correspoding

    90   // LockNode/UnLockNode to avoid creating Phi's.

    91   virtual uint hash() const ;                  // { return NO_HASH; }

    92   virtual uint cmp( const Node &n ) const ;    // Always fail, except on self

    93   virtual int Opcode() const;

    94   virtual const Type *Value( PhaseTransform *phase ) const { return TypeInt::CC; }

    95   const Type *sub(const Type *t1, const Type *t2) const { return TypeInt::CC;}

    96 

    97 };