/* Common hooks for Synopsys DesignWare ARC
   Copyright (C) 1994-2021 Free Software Foundation, Inc.
   Contributor: Joern Rennecke <joern.rennecke@embecosm.com>
		on behalf of Synopsys Inc.
		Claudiu Zissulescu <Claudiu.Zissulescu@synopsys.com>

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 "diagnostic-core.h"
#include "tm.h"
#include "common/common-target.h"
#include "opts.h"
#include "flags.h"

static void
arc_option_init_struct (struct gcc_options *opts ATTRIBUTE_UNUSED)
{
  /* Which cpu we're compiling for (ARC600, ARC601, ARC700, ARCv2).  */
  arc_cpu = PROCESSOR_NONE;
}

/* Set default optimization options.  */
/* The conditions are incomplete, so we rely on the evaluation order here,
   which goes from first to last, i.e. the last match prevails.  */
/* ??? But this trick only works for reject_negative options.  Approximate
   missing option combination.  */
#define OPT_LEVELS_3_PLUS_SPEED_ONLY OPT_LEVELS_3_PLUS
static const struct default_options arc_option_optimization_table[] =
  {
    { OPT_LEVELS_ALL, OPT_mRcq, NULL, 1 },
    { OPT_LEVELS_ALL, OPT_mRcw, NULL, 1 },
    { OPT_LEVELS_ALL, OPT_msize_level_, NULL, 1 },
    { OPT_LEVELS_ALL, OPT_mearly_cbranchsi, NULL, 1 },
    { OPT_LEVELS_ALL, OPT_mbbit_peephole, NULL, 1 },
    { OPT_LEVELS_SIZE, OPT_ftree_loop_optimize, NULL, 0},
    { OPT_LEVELS_SIZE, OPT_fmove_loop_invariants, NULL, 0},
    { OPT_LEVELS_SIZE, OPT_fbranch_count_reg, NULL, 0},
    { OPT_LEVELS_SIZE, OPT_fdelayed_branch, NULL, 0 },
    { OPT_LEVELS_SIZE, OPT_fsection_anchors, NULL, 1 },
    { OPT_LEVELS_SIZE, OPT_mcase_vector_pcrel, NULL, 1 },
    { OPT_LEVELS_SIZE, OPT_msize_level_, NULL, 3 },
    { OPT_LEVELS_SIZE, OPT_mmillicode, NULL, 1 },
    { OPT_LEVELS_SIZE, OPT_fif_conversion, NULL, 0 },
    { OPT_LEVELS_1_PLUS, OPT_fomit_frame_pointer, NULL, 1 },
    { OPT_LEVELS_3_PLUS_SPEED_ONLY, OPT_msize_level_, NULL, 0 },
    { OPT_LEVELS_NONE, 0, NULL, 0 }
  };

/*  Process options.  */
static bool
arc_handle_option (struct gcc_options *opts,
		   struct gcc_options *opts_set ATTRIBUTE_UNUSED,
		   const struct cl_decoded_option *decoded,
		   location_t loc)
{
  size_t code = decoded->opt_index;
  int value = decoded->value;
  static int mcpu_seen = PROCESSOR_NONE;

  switch (code)
    {
    case OPT_mcpu_:
      /* N.B., at this point arc_cpu has already been set to its new value by
	 our caller, so comparing arc_cpu with PROCESSOR_NONE is pointless.  */

      if (mcpu_seen != PROCESSOR_NONE && mcpu_seen != value)
	warning_at (loc, 0, "multiple %<-mcpu=%> options specified");
      mcpu_seen = value;
      break;

    case OPT_mmpy_option_:
      if (opts->x_arc_mpy_option == 1)
	warning_at (loc, 0, "Unsupported value for mmpy-option");
      break;

    default:
      break;
    }

  return true;
}

#undef  TARGET_OPTION_INIT_STRUCT
#define TARGET_OPTION_INIT_STRUCT arc_option_init_struct

#undef  TARGET_OPTION_OPTIMIZATION_TABLE
#define TARGET_OPTION_OPTIMIZATION_TABLE arc_option_optimization_table

#define DEFAULT_NO_SDATA (TARGET_SDATA_DEFAULT ? 0 : MASK_NO_SDATA_SET)

#undef  TARGET_DEFAULT_TARGET_FLAGS
#define TARGET_DEFAULT_TARGET_FLAGS (DEFAULT_NO_SDATA | MASK_VOLATILE_CACHE_SET)

#undef  TARGET_HANDLE_OPTION
#define TARGET_HANDLE_OPTION arc_handle_option

#include "common/common-target-def.h"

struct gcc_targetm_common targetm_common = TARGETM_COMMON_INITIALIZER;