/* Common hooks for AArch64.
   Copyright (C) 2012-2013 Free Software Foundation, Inc.
   Contributed by ARM Ltd.

   This file is part of GCC.

   GCC is free software; you can redistribute it and/or modify it
   under the terms of the GNU General Public License as published
   by the Free Software Foundation; either version 3, or (at your
   option) any later version.

   GCC is distributed in the hope that it will be useful, but WITHOUT
   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
   or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
   License for more details.

   You should have received a copy of the GNU General Public License
   along with GCC; see the file COPYING3.  If not see
   <http://www.gnu.org/licenses/>.  */

#include "config.h"
#include "system.h"
#include "coretypes.h"
#include "tm.h"
#include "tm_p.h"
#include "common/common-target.h"
#include "common/common-target-def.h"
#include "opts.h"
#include "flags.h"

#ifdef  TARGET_BIG_ENDIAN_DEFAULT
#undef  TARGET_DEFAULT_TARGET_FLAGS
#define TARGET_DEFAULT_TARGET_FLAGS (MASK_BIG_END)
#endif

#undef  TARGET_HANDLE_OPTION
#define TARGET_HANDLE_OPTION aarch64_handle_option

#undef	TARGET_OPTION_OPTIMIZATION_TABLE
#define TARGET_OPTION_OPTIMIZATION_TABLE aarch_option_optimization_table

/* Set default optimization options.  */
static const struct default_options aarch_option_optimization_table[] =
  {
    /* Enable section anchors by default at -O1 or higher.  */
    { OPT_LEVELS_1_PLUS, OPT_fsection_anchors, NULL, 1 },
    /* Enable redundant extension instructions removal at -O2 and higher.  */
    { OPT_LEVELS_2_PLUS, OPT_free, NULL, 1 },
    { OPT_LEVELS_NONE, 0, NULL, 0 }
  };

/* Implement TARGET_HANDLE_OPTION.
   This function handles the target specific options for CPU/target selection.

   march wins over mcpu, so when march is defined, mcpu takes the same value,
   otherwise march remains undefined. mtune can be used with either march or
   mcpu. If march and mcpu are used together, the rightmost option wins.
   mtune can be used with either march or mcpu.  */

static bool
aarch64_handle_option (struct gcc_options *opts,
		       struct gcc_options *opts_set ATTRIBUTE_UNUSED,
		       const struct cl_decoded_option *decoded,
		       location_t loc ATTRIBUTE_UNUSED)
{
  size_t code = decoded->opt_index;
  const char *arg = decoded->arg;

  switch (code)
    {
    case OPT_march_:
      opts->x_aarch64_arch_string = arg;
      opts->x_aarch64_cpu_string = arg;
      return true;

    case OPT_mcpu_:
      opts->x_aarch64_cpu_string = arg;
      opts->x_aarch64_arch_string = NULL;
      return true;

    case OPT_mtune_:
      opts->x_aarch64_tune_string = arg;
      return true;

    default:
      return true;
    }
}

struct gcc_targetm_common targetm_common = TARGETM_COMMON_INITIALIZER;
