97 lines
2.9 KiB
C
97 lines
2.9 KiB
C
/* params.h - Run-time parameters.
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Copyright (C) 2001 Free Software Foundation, Inc.
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Written by Mark Mitchell <mark@codesourcery.com>.
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This file is part of GNU CC.
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GNU CC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU CC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License 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 GNU CC; see the file COPYING. If not, write to
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the Free Software Foundation, 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA.
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*/
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/* This module provides a means for setting integral parameters
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dynamically. Instead of encoding magic numbers in various places,
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use this module to organize all the magic numbers in a single
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place. The values of the parameters can be set on the
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command-line, thereby providing a way to control the amount of
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effort spent on particular optimization passes, or otherwise tune
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the behavior of the compiler.
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Since their values can be set on the command-line, these parameters
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should not be used for non-dynamic memory allocation. */
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#ifndef GCC_PARAMS_H
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#define GCC_PARAMS_H
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/* No parameter shall have this value. */
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#define INVALID_PARAM_VAL (-1)
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/* The information associated with each parameter. */
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typedef struct param_info
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{
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/* The name used with the `--param <name>=<value>' switch to set this
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value. */
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const char *option;
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/* The associated value. */
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int value;
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/* A short description of the option. */
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const char *help;
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} param_info;
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/* An array containing the compiler parameters and their current
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values. */
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extern param_info *compiler_params;
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/* Add the N PARAMS to the current list of compiler parameters. */
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extern void add_params
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PARAMS ((const param_info params[], size_t n));
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/* Set the VALUE associated with the parameter given by NAME. */
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extern void set_param_value
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PARAMS ((const char *name, int value));
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/* The parameters in use by language-independent code. */
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typedef enum compiler_param
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{
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#define DEFPARAM(ENUM, OPTION, HELP, DEFAULT) \
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ENUM,
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#include "params.def"
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#undef DEFPARAM
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LAST_PARAM
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} compiler_param;
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/* The value of the parameter given by ENUM. */
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#define PARAM_VALUE(ENUM) \
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(compiler_params[(int) ENUM].value)
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/* Macros for the various parameters. */
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#define MAX_INLINE_INSNS \
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PARAM_VALUE (PARAM_MAX_INLINE_INSNS)
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#define MAX_DELAY_SLOT_INSN_SEARCH \
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PARAM_VALUE (PARAM_MAX_DELAY_SLOT_INSN_SEARCH)
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#define MAX_DELAY_SLOT_LIVE_SEARCH \
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PARAM_VALUE (PARAM_MAX_DELAY_SLOT_LIVE_SEARCH)
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#define MAX_GCSE_MEMORY \
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((size_t) PARAM_VALUE (PARAM_MAX_GCSE_MEMORY))
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#endif /* ! GCC_PARAMS_H */
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