jdk8-mips64-public/hotspot: src/share/vm/ci/ciMethodBlocks.hpp@194b8e3a2fc4

6384206: Phis which are later unneeded are impairing our ability to inline based on static types
Reviewed-by: rasbold, jrose

     1 /*

     2  * Copyright 2006-2008 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  */

    26 class ciBlock;

    28 typedef short ciBlockIndex;

    30 class ciMethodBlocks : public ResourceObj {

    31 private:

    32   ciMethod *_method;

    33   Arena *_arena;

    34   GrowableArray<ciBlock *>  *_blocks;

    35   ciBlock  **_bci_to_block;

    36   int _num_blocks;

    37   int _code_size;

    39   void do_analysis();

    40 public:

    41   ciMethodBlocks(Arena *arena, ciMethod *meth);

    43   ciBlock *block_containing(int bci);

    44   ciBlock *block(int index)  { return _blocks->at(index); }

    45   ciBlock *make_block_at(int bci);

    46   ciBlock *split_block_at(int bci);

    47   bool is_block_start(int bci);

    48   int num_blocks()  { return _num_blocks;}

    49   void clear_processed();

    51   ciBlock *make_dummy_block(); // a block not associated with a bci

    53 #ifndef PRODUCT

    54   void dump();

    55 #endif

    56 };

    58 class ciBlock : public ResourceObj {

    59 private:

    60   int _idx;

    61   int _start_bci;

    62   int _limit_bci;

    63   int _control_bci;

    64   uint _flags;

    65   int _ex_start_bci;

    66   int _ex_limit_bci;

    67 #ifndef PRODUCT

    68   ciMethod *_method;

    69 #endif

    70   enum {

    71     Processed   = (1 << 0),

    72     Handler     = (1 << 1),

    73     MayThrow    = (1 << 2),

    74     DoesJsr     = (1 << 3),

    75     DoesRet     = (1 << 4),

    76     RetTarget   = (1 << 5),

    77     HasHandler  = (1 << 6)

    78   };

    81 public:

    82   enum {

    83     fall_through_bci = -1

    84   };

    86   ciBlock(ciMethod *method, int index, int start_bci);

    87   int start_bci() const         { return _start_bci; }

    88   int limit_bci() const         { return _limit_bci; }

    89   int control_bci() const       { return _control_bci; }

    90   int index() const             { return _idx; }

    91   void set_start_bci(int bci)   { _start_bci = bci; }

    92   void set_limit_bci(int bci)   { _limit_bci = bci; }

    93   void set_control_bci(int bci) { _control_bci = bci;}

    94   void set_exception_range(int start_bci, int limit_bci);

    95   int ex_start_bci() const      { return _ex_start_bci; }

    96   int ex_limit_bci() const      { return _ex_limit_bci; }

    97   bool contains(int bci) const { return start_bci() <= bci && bci < limit_bci(); }

    99   // flag handling

   100   bool  processed() const           { return (_flags & Processed) != 0; }

   101   bool  is_handler() const          { return (_flags & Handler) != 0; }

   102   bool  may_throw() const           { return (_flags & MayThrow) != 0; }

   103   bool  does_jsr() const            { return (_flags & DoesJsr) != 0; }

   104   bool  does_ret() const            { return (_flags & DoesRet) != 0; }

   105   bool  has_handler() const         { return (_flags & HasHandler) != 0; }

   106   bool  is_ret_target() const       { return (_flags & RetTarget) != 0; }

   107   void  set_processed()             { _flags |= Processed; }

   108   void  clear_processed()           { _flags &= ~Processed; }

   109   void  set_handler()               { _flags |= Handler; }

   110   void  set_may_throw()             { _flags |= MayThrow; }

   111   void  set_does_jsr()              { _flags |= DoesJsr; }

   112   void  clear_does_jsr()            { _flags &= ~DoesJsr; }

   113   void  set_does_ret()              { _flags |= DoesRet; }

   114   void  clear_does_ret()            { _flags &= ~DoesRet; }

   115   void  set_is_ret_target()         { _flags |= RetTarget; }

   116   void  set_has_handler()           { _flags |= HasHandler; }

   117   void  clear_exception_handler()   { _flags &= ~Handler; _ex_start_bci = -1; _ex_limit_bci = -1; }

   118 #ifndef PRODUCT

   119   ciMethod *method() const          { return _method; }

   120   void dump();

   121   void print_on(outputStream* st) const  PRODUCT_RETURN;

   122 #endif

   123 };

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