gcc/target-globals.c

   1 /* Target-dependent globals.
   2    Copyright (C) 2010-2014 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 #include "config.h"
  21 #include "system.h"
  22 #include "coretypes.h"
  23 #include "tm.h"
  24 #include "insn-config.h"
  25 #include "machmode.h"
  26 #include "tree.h"
  27 #include "ggc.h"
  28 #include "toplev.h"
  29 #include "target-globals.h"
  30 #include "flags.h"
  31 #include "regs.h"
  32 #include "rtl.h"
  33 #include "hard-reg-set.h"
  34 #include "reload.h"
  35 #include "expmed.h"
  36 #include "expr.h"
  37 #include "optabs.h"
  38 #include "libfuncs.h"
  39 #include "cfgloop.h"
  40 #include "ira-int.h"
  41 #include "builtins.h"
  42 #include "gcse.h"
  43 #include "bb-reorder.h"
  44 #include "lower-subreg.h"
  45 #include "recog.h"
  46
  47 #if SWITCHABLE_TARGET
  48 struct target_globals default_target_globals = {
  49   &default_target_flag_state,
  50   &default_target_regs,
  51   &default_target_rtl,
  52   &default_target_recog,
  53   &default_target_hard_regs,
  54   &default_target_reload,
  55   &default_target_expmed,
  56   &default_target_optabs,
  57   &default_target_libfuncs,
  58   &default_target_cfgloop,
  59   &default_target_ira,
  60   &default_target_ira_int,
  61   &default_target_builtins,
  62   &default_target_gcse,
  63   &default_target_bb_reorder,
  64   &default_target_lower_subreg
  65 };
  66
  67 struct target_globals *
  68 save_target_globals (void)
  69 {
  70   struct target_globals *g;
  71   struct target_globals_extra {
  72     struct target_globals g;
  73     struct target_flag_state flag_state;
  74     struct target_optabs optabs;
  75     struct target_cfgloop cfgloop;
  76     struct target_builtins builtins;
  77     struct target_gcse gcse;
  78     struct target_bb_reorder bb_reorder;
  79     struct target_lower_subreg lower_subreg;
  80   } *p;
  81   p = (struct target_globals_extra *)
  82       ggc_internal_cleared_alloc (sizeof (struct target_globals_extra));
  83   g = (struct target_globals *) p;
  84   g->flag_state = &p->flag_state;
  85   g->regs = ggc_internal_cleared_alloc (sizeof (struct target_regs));
  86   g->rtl = ggc_cleared_alloc<target_rtl> ();
  87   g->recog = ggc_internal_cleared_alloc (sizeof (struct target_recog));
  88   g->hard_regs
  89     = ggc_internal_cleared_alloc (sizeof (struct target_hard_regs));
  90   g->reload = ggc_internal_cleared_alloc (sizeof (struct target_reload));
  91   g->expmed =  ggc_internal_cleared_alloc (sizeof (struct target_expmed));
  92   g->optabs = &p->optabs;
  93   g->libfuncs = ggc_cleared_alloc<target_libfuncs> ();
  94   g->cfgloop = &p->cfgloop;
  95   g->ira = ggc_internal_cleared_alloc (sizeof (struct target_ira));
  96   g->ira_int = ggc_internal_cleared_alloc (sizeof (struct target_ira_int));
  97   g->builtins = &p->builtins;
  98   g->gcse = &p->gcse;
  99   g->bb_reorder = &p->bb_reorder;
 100   g->lower_subreg = &p->lower_subreg;
 101   restore_target_globals (g);
 102   init_reg_sets ();
 103   target_reinit ();
 104   return g;
 105 }
 106
 107 /* Like save_target_globals() above, but set *this_target_optabs
 108    correctly when a previous function has changed
 109    *this_target_optabs.  */
 110
 111 struct target_globals *
 112 save_target_globals_default_opts ()
 113 {
 114   struct target_globals *globals;
 115
 116   if (optimization_current_node != optimization_default_node)
 117     {
 118       tree opts = optimization_current_node;
 119       /* Temporarily switch to the default optimization node, so that
 120          *this_target_optabs is set to the default, not reflecting
 121          whatever a previous function used for the optimize
 122          attribute.  */
 123       optimization_current_node = optimization_default_node;
 124       cl_optimization_restore
 125         (&global_options,
 126          TREE_OPTIMIZATION (optimization_default_node));
 127       globals = save_target_globals ();
 128       optimization_current_node = opts;
 129       cl_optimization_restore (&global_options,
 130                                TREE_OPTIMIZATION (opts));
 131       return globals;
 132     }
 133   return save_target_globals ();
 134 }
 135
 136 #endif