1 /*
   2  * Copyright (c) 2000, 2010, 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_VM_OPTO_REGALLOC_HPP
  26 #define SHARE_VM_OPTO_REGALLOC_HPP
  27 
  28 #include "code/vmreg.hpp"
  29 #include "opto/block.hpp"
  30 #include "opto/matcher.hpp"
  31 #include "opto/phase.hpp"
  32 
  33 class Node;
  34 class Matcher;
  35 class PhaseCFG;
  36 
  37 #define  MAX_REG_ALLOCATORS   10
  38 
  39 //------------------------------PhaseRegAlloc------------------------------------
  40 // Abstract register allocator
  41 class PhaseRegAlloc : public Phase {

  42   static void (*_alloc_statistics[MAX_REG_ALLOCATORS])();
  43   static int _num_allocators;
  44 
  45 protected:
  46   OptoRegPair  *_node_regs;
  47   uint         _node_regs_max_index;
  48   VectorSet    _node_oops;         // Mapping from node indices to oopiness
  49 
  50   void alloc_node_regs(int size);  // allocate _node_regs table with at least "size" elements
  51 
  52   PhaseRegAlloc( uint unique, PhaseCFG &cfg, Matcher &matcher,
  53                  void (*pr_stats)());
  54 public:
  55   PhaseCFG &_cfg;               // Control flow graph
  56   uint _framesize;              // Size of frame in stack-slots. not counting preserve area
  57   OptoReg::Name _max_reg;       // Past largest register seen
  58   Matcher &_matcher;            // Convert Ideal to MachNodes
  59   uint node_regs_max_index() const { return _node_regs_max_index; }
  60 
  61   // Get the register associated with the Node

   1 /*
   2  * Copyright (c) 2000, 2011, 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_VM_OPTO_REGALLOC_HPP
  26 #define SHARE_VM_OPTO_REGALLOC_HPP
  27 
  28 #include "code/vmreg.hpp"
  29 #include "opto/block.hpp"
  30 #include "opto/matcher.hpp"
  31 #include "opto/phase.hpp"
  32 
  33 class Node;
  34 class Matcher;
  35 class PhaseCFG;
  36 
  37 #define  MAX_REG_ALLOCATORS   10
  38 
  39 //------------------------------PhaseRegAlloc------------------------------------
  40 // Abstract register allocator
  41 class PhaseRegAlloc : public Phase {
  42   friend class VMStructs;
  43   static void (*_alloc_statistics[MAX_REG_ALLOCATORS])();
  44   static int _num_allocators;
  45 
  46 protected:
  47   OptoRegPair  *_node_regs;
  48   uint         _node_regs_max_index;
  49   VectorSet    _node_oops;         // Mapping from node indices to oopiness
  50 
  51   void alloc_node_regs(int size);  // allocate _node_regs table with at least "size" elements
  52 
  53   PhaseRegAlloc( uint unique, PhaseCFG &cfg, Matcher &matcher,
  54                  void (*pr_stats)());
  55 public:
  56   PhaseCFG &_cfg;               // Control flow graph
  57   uint _framesize;              // Size of frame in stack-slots. not counting preserve area
  58   OptoReg::Name _max_reg;       // Past largest register seen
  59   Matcher &_matcher;            // Convert Ideal to MachNodes
  60   uint node_regs_max_index() const { return _node_regs_max_index; }
  61 
  62   // Get the register associated with the Node