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 "lra-int.h"
  42 #include "builtins.h"
  43 #include "gcse.h"
  44 #include "bb-reorder.h"
  45 #include "lower-subreg.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_hard_regs,
  53   &default_target_reload,
  54   &default_target_expmed,
  55   &default_target_optabs,
  56   &default_target_libfuncs,
  57   &default_target_cfgloop,
  58   &default_target_ira,
  59   &default_target_ira_int,
  60   &default_target_lra_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_stat (sizeof (struct target_globals_extra)
  83                                        PASS_MEM_STAT);
  84   g = (struct target_globals *) p;
  85   g->flag_state = &p->flag_state;
  86   g->regs = ggc_internal_cleared_alloc_stat (sizeof (struct target_regs)
  87                                              PASS_MEM_STAT);
  88   g->rtl = ggc_alloc_cleared_target_rtl ();
  89   g->hard_regs
  90     = ggc_internal_cleared_alloc_stat (sizeof (struct target_hard_regs)
  91                                        PASS_MEM_STAT);
  92   g->reload = ggc_internal_cleared_alloc_stat (sizeof (struct target_reload)
  93                                                PASS_MEM_STAT);
  94   g->expmed =  ggc_internal_cleared_alloc_stat (sizeof (struct target_expmed)
  95                                                 PASS_MEM_STAT);
  96   g->optabs = &p->optabs;
  97   g->libfuncs = ggc_alloc_cleared_target_libfuncs ();
  98   g->cfgloop = &p->cfgloop;
  99   g->ira = ggc_internal_cleared_alloc_stat (sizeof (struct target_ira)
 100                                             PASS_MEM_STAT);
 101   g->ira_int = ggc_internal_cleared_alloc_stat (sizeof (struct target_ira_int)
 102                                                 PASS_MEM_STAT);
 103   g->lra_int = ggc_internal_cleared_alloc_stat (sizeof (struct target_lra_int)
 104                                                 PASS_MEM_STAT);
 105   g->builtins = &p->builtins;
 106   g->gcse = &p->gcse;
 107   g->bb_reorder = &p->bb_reorder;
 108   g->lower_subreg = &p->lower_subreg;
 109   restore_target_globals (g);
 110   init_reg_sets ();
 111   target_reinit ();
 112   return g;
 113 }
 114
 115 /* Like save_target_globals() above, but set *this_target_optabs
 116    correctly when a previous function has changed
 117    *this_target_optabs.  */
 118
 119 struct target_globals *
 120 save_target_globals_default_opts ()
 121 {
 122   struct target_globals *globals;
 123
 124   if (optimization_current_node != optimization_default_node)
 125     {
 126       tree opts = optimization_current_node;
 127       /* Temporarily switch to the default optimization node, so that
 128          *this_target_optabs is set to the default, not reflecting
 129          whatever a previous function used for the optimize
 130          attribute.  */
 131       optimization_current_node = optimization_default_node;
 132       cl_optimization_restore
 133         (&global_options,
 134          TREE_OPTIMIZATION (optimization_default_node));
 135       globals = save_target_globals ();
 136       optimization_current_node = opts;
 137       cl_optimization_restore (&global_options,
 138                                TREE_OPTIMIZATION (opts));
 139       return globals;
 140     }
 141   return save_target_globals ();
 142 }
 143
 144 #endif