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/* params.h - Run-time parameters.
Copyright (C) 2001 Free Software Foundation, Inc.
Written by Mark Mitchell <mark@codesourcery.com>.
This file is part of GNU CC.
GNU CC 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 2, or (at your option)
any later version.
GNU CC 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 GNU CC; see the file COPYING. If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
/* This module provides a means for setting integral parameters
dynamically. Instead of encoding magic numbers in various places,
use this module to organize all the magic numbers in a single
place. The values of the parameters can be set on the
command-line, thereby providing a way to control the amount of
effort spent on particular optimization passes, or otherwise tune
the behavior of the compiler.
Since their values can be set on the command-line, these parameters
should not be used for non-dynamic memory allocation. */
#ifndef PARAMS_H
#define PARAMS_H
/* No parameter shall have this value. */
#define INVALID_PARAM_VAL (-1)
/* The information associated with each parameter. */
typedef struct param_info
{
/* The name used with the `--param <name>=<value>' switch to set this
value. */
const char *option;
/* The associated value. */
int value;
} param_info;
/* An array containing the compiler parameters and their current
values. */
extern param_info *compiler_params;
/* Add the N PARAMS to the current list of compiler parameters. */
extern void add_params
PARAMS ((const param_info params[], size_t n));
/* Set the VALUE associated with the parameter given by NAME. */
extern void set_param_value
PARAMS ((const char *name, int value));
/* The parameters in use by language-independent code. */
typedef enum compiler_param
{
#define DEFPARAM(ENUM, OPTION, HELP, DEFAULT) \
ENUM,
#include "params.def"
#undef DEFPARAM
LAST_PARAM
} compiler_param;
/* The value of the parameter given by ENUM. */
#define PARAM_VALUE(ENUM) \
(compiler_params[(int) ENUM].value)
/* Macros for the various parameters. */
#define MAX_INLINE_INSNS \
PARAM_VALUE (PARAM_MAX_INLINE_INSNS)
#define MAX_DELAY_SLOT_INSN_SEARCH \
PARAM_VALUE (PARAM_MAX_DELAY_SLOT_INSN_SEARCH)
#define MAX_DELAY_SLOT_LIVE_SEARCH \
PARAM_VALUE (PARAM_MAX_DELAY_SLOT_LIVE_SEARCH)
#define MAX_GCSE_MEMORY \
((size_t) PARAM_VALUE (PARAM_MAX_GCSE_MEMORY))
#endif /* PARAMS_H */
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