LCOV - code coverage report
Current view: top level - gcc/rtl-ssa - changes.h (source / functions) Hit Total Coverage
Test: gcc.info Lines: 5 7 71.4 %
Date: 2021-11-27 14:51:55 Functions: 0 0 -
Legend: Lines: hit not hit | Branches: + taken - not taken # not executed Branches: 0 0 -

           Branch data     Line data    Source code
       1                 :            : // RTL SSA classes related to changing instructions                 -*- C++ -*-
       2                 :            : // Copyright (C) 2020-2021 Free Software Foundation, Inc.
       3                 :            : //
       4                 :            : // This file is part of GCC.
       5                 :            : //
       6                 :            : // GCC is free software; you can redistribute it and/or modify it under
       7                 :            : // the terms of the GNU General Public License as published by the Free
       8                 :            : // Software Foundation; either version 3, or (at your option) any later
       9                 :            : // version.
      10                 :            : //
      11                 :            : // GCC is distributed in the hope that it will be useful, but WITHOUT ANY
      12                 :            : // WARRANTY; without even the implied warranty of MERCHANTABILITY or
      13                 :            : // FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
      14                 :            : // for more details.
      15                 :            : //
      16                 :            : // You should have received a copy of the GNU General Public License
      17                 :            : // along with GCC; see the file COPYING3.  If not see
      18                 :            : // <http://www.gnu.org/licenses/>.
      19                 :            : 
      20                 :            : namespace rtl_ssa {
      21                 :            : 
      22                 :            : // A class that describes a change that we're considering making to an
      23                 :            : // instruction.  There are three choices:
      24                 :            : //
      25                 :            : // (1) delete the instruction
      26                 :            : // (2) replace the instruction with a new instruction in-place
      27                 :            : // (3) replace the instruction with a new instruction at a different location
      28                 :            : //
      29                 :            : // Anything related to the "new instruction" is irrelevant for (1).
      30                 :            : //
      31                 :            : // The class doesn't actually change anything itself, it simply records
      32                 :            : // something that we might do.
      33                 :            : class insn_change
      34                 :            : {
      35                 :            : public:
      36                 :            :   enum delete_action { DELETE };
      37                 :            : 
      38                 :            :   // Construct a possible change to INSN.
      39                 :            :   insn_change (insn_info *insn);
      40                 :            : 
      41                 :            :   // Construct a possible deletion of INSN.
      42                 :            :   insn_change (insn_info *insn, delete_action);
      43                 :            : 
      44                 :            :   // The instruction that we would change.
      45                 :   93362724 :   insn_info *insn () const { return m_insn; }
      46                 :            : 
      47                 :            :   // The rtx_insn of the instruction that we would change.
      48                 :    8452508 :   rtx_insn *rtl () const { return m_insn->rtl (); }
      49                 :            : 
      50                 :            :   // The basic block that contains insn ().
      51                 :          0 :   bb_info *bb () const { return m_insn->bb (); }
      52                 :            : 
      53                 :            :   // The extended basic block that contains insn ().
      54                 :            :   ebb_info *ebb () const { return m_insn->ebb (); }
      55                 :            : 
      56                 :            :   // The uid of the instruction that we would change.
      57                 :            :   unsigned int insn_uid () const { return m_insn->uid (); }
      58                 :            : 
      59                 :            :   // The list of things that the original instruction defined and used.
      60                 :    4708952 :   def_array old_defs () const { return m_insn->defs (); }
      61                 :    2354476 :   use_array old_uses () const { return m_insn->uses (); }
      62                 :            : 
      63                 :            :   // The cost of the original instruction, as calculated by the target.
      64                 :          0 :   unsigned int old_cost () const { return m_insn->cost (); }
      65                 :            : 
      66                 :            :   // Return true if the original instruction would simply be deleted,
      67                 :            :   // rather than being replaced by a new instruction.
      68                 :    9417926 :   bool is_deletion () const { return m_is_deletion; }
      69                 :            : 
      70                 :            :   // Print a description of the change to PP.
      71                 :            :   void print (pretty_printer *pp) const;
      72                 :            : 
      73                 :            :   // Return an insn_change for deleting INSN.
      74                 :            :   static insn_change delete_insn (insn_info *insn) { return { insn, DELETE }; }
      75                 :            : 
      76                 :            : private:
      77                 :            :   // The value returned by insn ().
      78                 :            :   insn_info *m_insn;
      79                 :            : 
      80                 :            : public:
      81                 :            :   // The list of things that the new instruction would define and use.
      82                 :            :   def_array new_defs;
      83                 :            :   use_array new_uses;
      84                 :            : 
      85                 :            :   // The range of instructions after which the instruction could be placed.
      86                 :            :   // The range can include INSN itself: placing the instruction after either
      87                 :            :   // INSN or INSN->prev_nondebug_insn () is equivalent to not moving the
      88                 :            :   // instruction.
      89                 :            :   insn_range_info move_range;
      90                 :            : 
      91                 :            :   // The cost that the new instruction would have, as calculated by the target.
      92                 :            :   unsigned int new_cost;
      93                 :            : 
      94                 :            : private:
      95                 :            :   // The value returned by is_deletion ().
      96                 :            :   bool m_is_deletion;
      97                 :            : };
      98                 :            : 
      99                 :            : // A class that represents a closure of the two-argument form of
     100                 :            : // insn_is_changing.  See the comment above the one-argument form
     101                 :            : // for details.
     102                 :            : class insn_is_changing_closure
     103                 :            : {
     104                 :            : public:
     105                 :            :   insn_is_changing_closure (array_slice<insn_change *const> changes);
     106                 :            :   bool operator() (const insn_info *) const;
     107                 :            : 
     108                 :            : private:
     109                 :            :   array_slice<insn_change *const> m_changes;
     110                 :            : };
     111                 :            : 
     112                 :            : void pp_insn_change (pretty_printer *, const insn_change &);
     113                 :            : 
     114                 :            : }
     115                 :            : 
     116                 :            : void dump (FILE *, const rtl_ssa::insn_change &);
     117                 :            : 
     118                 :            : void DEBUG_FUNCTION debug (const rtl_ssa::insn_change &);

Generated by: LCOV version 1.15+git.20200812.d100e6c

LCOV profile is generated on x86_64 machine using following configure options: configure --disable-bootstrap --enable-coverage=opt --enable-languages=c,c++,fortran,go,jit,lto --enable-host-shared. GCC test suite is run with the built compiler.