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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [gcc/] [params.c] - Blame information for rev 684

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1 684 jeremybenn
/* params.c - Run-time parameters.
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   Copyright (C) 2001, 2003, 2004, 2005, 2007, 2008, 2009, 2010, 2011
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   Free Software Foundation, Inc.
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   Written by Mark Mitchell <mark@codesourcery.com>.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 3, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING3.  If not see
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<http://www.gnu.org/licenses/>.  */
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#include "config.h"
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#include "system.h"
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#include "coretypes.h"
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#include "common/common-target.h"
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#include "params.h"
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#include "diagnostic-core.h"
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/* An array containing the compiler parameters and their current
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   values.  */
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param_info *compiler_params;
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/* The number of entries in the table.  */
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static size_t num_compiler_params;
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/* Whether the parameters have all been initialized and had their
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   default values determined.  */
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static bool params_finished;
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static const param_info lang_independent_params[] = {
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#define DEFPARAM(ENUM, OPTION, HELP, DEFAULT, MIN, MAX) \
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  { OPTION, DEFAULT, MIN, MAX, HELP },
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#include "params.def"
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#undef DEFPARAM
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  { NULL, 0, 0, 0, NULL }
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};
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/* Add the N PARAMS to the current list of compiler parameters.  */
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void
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add_params (const param_info params[], size_t n)
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{
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  gcc_assert (!params_finished);
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  /* Allocate enough space for the new parameters.  */
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  compiler_params = XRESIZEVEC (param_info, compiler_params,
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                                num_compiler_params + n);
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  /* Copy them into the table.  */
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  memcpy (compiler_params + num_compiler_params,
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          params,
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          n * sizeof (param_info));
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  /* Keep track of how many parameters we have.  */
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  num_compiler_params += n;
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}
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/* Add all parameters and default values that can be set in both the
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   driver and the compiler proper.  */
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void
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global_init_params (void)
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{
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  add_params (lang_independent_params, LAST_PARAM);
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  targetm_common.option_default_params ();
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}
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/* Note that all parameters have been added and all default values
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   set.  */
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void
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finish_params (void)
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{
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  params_finished = true;
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}
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/* Set the value of the parameter given by NUM to VALUE in PARAMS and
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   PARAMS_SET.  If EXPLICIT_P, this is being set by the user;
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   otherwise it is being set implicitly by the compiler.  */
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static void
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set_param_value_internal (compiler_param num, int value,
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                          int *params, int *params_set,
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                          bool explicit_p)
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{
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  size_t i = (size_t) num;
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  gcc_assert (params_finished);
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  params[i] = value;
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  if (explicit_p)
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    params_set[i] = true;
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}
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/* Set the VALUE associated with the parameter given by NAME in PARAMS
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   and PARAMS_SET.  */
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void
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set_param_value (const char *name, int value,
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                 int *params, int *params_set)
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{
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  size_t i;
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  /* Make sure nobody tries to set a parameter to an invalid value.  */
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  gcc_assert (value != INVALID_PARAM_VAL);
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  /* Scan the parameter table to find a matching entry.  */
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  for (i = 0; i < num_compiler_params; ++i)
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    if (strcmp (compiler_params[i].option, name) == 0)
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      {
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        if (value < compiler_params[i].min_value)
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          error ("minimum value of parameter %qs is %u",
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                 compiler_params[i].option,
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                 compiler_params[i].min_value);
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        else if (compiler_params[i].max_value > compiler_params[i].min_value
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                 && value > compiler_params[i].max_value)
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          error ("maximum value of parameter %qs is %u",
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                 compiler_params[i].option,
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                 compiler_params[i].max_value);
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        else
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          set_param_value_internal ((compiler_param) i, value,
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                                    params, params_set, true);
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        return;
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      }
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  /* If we didn't find this parameter, issue an error message.  */
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  error ("invalid parameter %qs", name);
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}
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/* Set the value of the parameter given by NUM to VALUE in PARAMS and
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   PARAMS_SET, implicitly, if it has not been set explicitly by the
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   user.  */
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void
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maybe_set_param_value (compiler_param num, int value,
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                       int *params, int *params_set)
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{
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  if (!params_set[(int) num])
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    set_param_value_internal (num, value, params, params_set, false);
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}
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/* Set the default value of a parameter given by NUM to VALUE, before
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   option processing.  */
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void
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set_default_param_value (compiler_param num, int value)
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{
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  gcc_assert (!params_finished);
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  compiler_params[(int) num].default_value = value;
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}
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/* Return the default value of parameter NUM.  */
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int
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default_param_value (compiler_param num)
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{
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  return compiler_params[(int) num].default_value;
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}
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/* Initialize an array PARAMS with default values of the
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   parameters.  */
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void
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init_param_values (int *params)
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{
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  size_t i;
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  gcc_assert (params_finished);
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  for (i = 0; i < num_compiler_params; i++)
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    params[i] = compiler_params[i].default_value;
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}
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/* Return the current value of num_compiler_params, for the benefit of
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   plugins that use parameters as features.  */
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size_t
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get_num_compiler_params (void)
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{
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  return num_compiler_params;
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}

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