gcc/common/config/arm/arm-common.c

   1 /* Common hooks for ARM.
   2    Copyright (C) 1991, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
   3    2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
   4    Free Software Foundation, Inc.
   5
   6    This file is part of GCC.
   7
   8    GCC is free software; you can redistribute it and/or modify it
   9    under the terms of the GNU General Public License as published
  10    by the Free Software Foundation; either version 3, or (at your
  11    option) any later version.
  12
  13    GCC is distributed in the hope that it will be useful, but WITHOUT
  14    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  15    or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
  16    License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with GCC; see the file COPYING3.  If not see
  20    <http://www.gnu.org/licenses/>.  */
  21
  22 #include "config.h"
  23 #include "system.h"
  24 #include "coretypes.h"
  25 #include "tm.h"
  26 #include "tm_p.h"
  27 #include "common/common-target.h"
  28 #include "common/common-target-def.h"
  29 #include "opts.h"
  30 #include "flags.h"
  31
  32 /* Set default optimization options.  */
  33 static const struct default_options arm_option_optimization_table[] =
  34   {
  35     /* Enable section anchors by default at -O1 or higher.  */
  36     { OPT_LEVELS_1_PLUS, OPT_fsection_anchors, NULL, 1 },
  37     { OPT_LEVELS_1_PLUS, OPT_fomit_frame_pointer, NULL, 1 },
  38     { OPT_LEVELS_NONE, 0, NULL, 0 }
  39   };
  40
  41 /* Implement TARGET_EXCEPT_UNWIND_INFO.  */
  42
  43 enum unwind_info_type
  44 arm_except_unwind_info (struct gcc_options *opts)
  45 {
  46   /* Honor the --enable-sjlj-exceptions configure switch.  */
  47 #ifdef CONFIG_SJLJ_EXCEPTIONS
  48   if (CONFIG_SJLJ_EXCEPTIONS)
  49     return UI_SJLJ;
  50 #endif
  51
  52   /* If not using ARM EABI unwind tables... */
  53   if (ARM_UNWIND_INFO)
  54     {
  55       /* For simplicity elsewhere in this file, indicate that all unwind
  56          info is disabled if we're not emitting unwind tables.  */
  57       if (!opts->x_flag_exceptions && !opts->x_flag_unwind_tables)
  58         return UI_NONE;
  59       else
  60         return UI_TARGET;
  61     }
  62
  63   /* ... we use sjlj exceptions for backwards compatibility.  */
  64   return UI_SJLJ;
  65 }
  66
  67 #undef  TARGET_DEFAULT_TARGET_FLAGS
  68 #define TARGET_DEFAULT_TARGET_FLAGS (TARGET_DEFAULT | MASK_SCHED_PROLOG)
  69
  70 #undef  TARGET_OPTION_OPTIMIZATION_TABLE
  71 #define TARGET_OPTION_OPTIMIZATION_TABLE arm_option_optimization_table
  72
  73 #undef TARGET_EXCEPT_UNWIND_INFO
  74 #define TARGET_EXCEPT_UNWIND_INFO  arm_except_unwind_info
  75
  76 struct gcc_targetm_common targetm_common = TARGETM_COMMON_INITIALIZER;