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_optabs *saved_this_fn_optabs = this_fn_optabs;
  72
  73   g = ggc_alloc_target_globals ();
  74   g->flag_state = XCNEW (struct target_flag_state);
  75   g->regs = XCNEW (struct target_regs);
  76   g->rtl = ggc_alloc_cleared_target_rtl ();
  77   g->hard_regs = XCNEW (struct target_hard_regs);
  78   g->reload = XCNEW (struct target_reload);
  79   g->expmed = XCNEW (struct target_expmed);
  80   g->optabs = XCNEW (struct target_optabs);
  81   g->libfuncs = ggc_alloc_cleared_target_libfuncs ();
  82   g->cfgloop = XCNEW (struct target_cfgloop);
  83   g->ira = XCNEW (struct target_ira);
  84   g->ira_int = XCNEW (struct target_ira_int);
  85   g->lra_int = XCNEW (struct target_lra_int);
  86   g->builtins = XCNEW (struct target_builtins);
  87   g->gcse = XCNEW (struct target_gcse);
  88   g->bb_reorder = XCNEW (struct target_bb_reorder);
  89   g->lower_subreg = XCNEW (struct target_lower_subreg);
  90   restore_target_globals (g);
  91   this_fn_optabs = this_target_optabs;
  92   init_reg_sets ();
  93   target_reinit ();
  94   this_fn_optabs = saved_this_fn_optabs;
  95   return g;
  96 }
  97
  98 /* Like save_target_globals() above, but set *this_target_optabs
  99    correctly when a previous function has changed
 100    *this_target_optabs.  */
 101
 102 struct target_globals *
 103 save_target_globals_default_opts ()
 104 {
 105   struct target_globals *globals;
 106
 107   if (optimization_current_node != optimization_default_node)
 108     {
 109       tree opts = optimization_current_node;
 110       /* Temporarily switch to the default optimization node, so that
 111          *this_target_optabs is set to the default, not reflecting
 112          whatever a previous function used for the optimize
 113          attribute.  */
 114       optimization_current_node = optimization_default_node;
 115       cl_optimization_restore
 116         (&global_options,
 117          TREE_OPTIMIZATION (optimization_default_node));
 118       globals = save_target_globals ();
 119       optimization_current_node = opts;
 120       cl_optimization_restore (&global_options,
 121                                TREE_OPTIMIZATION (opts));
 122       return globals;
 123     }
 124   return save_target_globals ();
 125 }
 126
 127 #endif