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/* params.h - Run-time parameters.

   Copyright (C) 2001, 2003, 2004, 2005 Free Software Foundation, Inc.

   Written by Mark Mitchell <mark@codesourcery.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 2, 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 COPYING.  If not, write to the Free

Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA

02110-1301, 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 GCC_PARAMS_H

#define GCC_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 *const option;

  /* The associated value.  */

  int value;

  /* Minimum acceptable value.  */

  int min_value;

  /* Maximum acceptable value, if greater than minimum  */

  int max_value;

  /* A short description of the option.  */

  const char *const help;

} 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 (const param_info params[], size_t n);

/* Set the VALUE associated with the parameter given by NAME.  */

extern void set_param_value (const char *name, int value);

/* The parameters in use by language-independent code.  */

typedef enum compiler_param

{

#define DEFPARAM(enumerator, option, msgid, default, min, max) \

  enumerator,

#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 SALIAS_MAX_IMPLICIT_FIELDS \

  PARAM_VALUE (PARAM_SALIAS_MAX_IMPLICIT_FIELDS)

#define SRA_MAX_STRUCTURE_SIZE \

  PARAM_VALUE (PARAM_SRA_MAX_STRUCTURE_SIZE)

#define SRA_MAX_STRUCTURE_COUNT \

  PARAM_VALUE (PARAM_SRA_MAX_STRUCTURE_COUNT)

#define SRA_FIELD_STRUCTURE_RATIO \

  PARAM_VALUE (PARAM_SRA_FIELD_STRUCTURE_RATIO)

#define MAX_INLINE_INSNS_SINGLE \

  PARAM_VALUE (PARAM_MAX_INLINE_INSNS_SINGLE)

#define MAX_INLINE_INSNS \

  PARAM_VALUE (PARAM_MAX_INLINE_INSNS)

#define MAX_INLINE_SLOPE \

  PARAM_VALUE (PARAM_MAX_INLINE_SLOPE)

#define MIN_INLINE_INSNS \

  PARAM_VALUE (PARAM_MIN_INLINE_INSNS)

#define MAX_INLINE_INSNS_AUTO \

  PARAM_VALUE (PARAM_MAX_INLINE_INSNS_AUTO)

#define MAX_VARIABLE_EXPANSIONS \

  PARAM_VALUE (PARAM_MAX_VARIABLE_EXPANSIONS)

#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_PENDING_LIST_LENGTH \

  PARAM_VALUE (PARAM_MAX_PENDING_LIST_LENGTH)

#define MAX_GCSE_MEMORY \

  ((size_t) PARAM_VALUE (PARAM_MAX_GCSE_MEMORY))

#define MAX_GCSE_PASSES \

  PARAM_VALUE (PARAM_MAX_GCSE_PASSES)

#define GCSE_AFTER_RELOAD_PARTIAL_FRACTION \

  PARAM_VALUE (PARAM_GCSE_AFTER_RELOAD_PARTIAL_FRACTION)

#define GCSE_AFTER_RELOAD_CRITICAL_FRACTION \

  PARAM_VALUE (PARAM_GCSE_AFTER_RELOAD_CRITICAL_FRACTION)

#define MAX_UNROLLED_INSNS \

  PARAM_VALUE (PARAM_MAX_UNROLLED_INSNS)

#define MAX_SMS_LOOP_NUMBER \

  PARAM_VALUE (PARAM_MAX_SMS_LOOP_NUMBER)

#define SMS_MAX_II_FACTOR \

  PARAM_VALUE (PARAM_SMS_MAX_II_FACTOR)

#define SMS_DFA_HISTORY \

  PARAM_VALUE (PARAM_SMS_DFA_HISTORY)

#define SMS_LOOP_AVERAGE_COUNT_THRESHOLD \

  PARAM_VALUE (PARAM_SMS_LOOP_AVERAGE_COUNT_THRESHOLD)

#define GLOBAL_VAR_THRESHOLD \

  PARAM_VALUE (PARAM_GLOBAL_VAR_THRESHOLD)

#define MAX_ALIASED_VOPS \

  PARAM_VALUE (PARAM_MAX_ALIASED_VOPS)

#define INTEGER_SHARE_LIMIT \

  PARAM_VALUE (PARAM_INTEGER_SHARE_LIMIT)

#define MAX_LAST_VALUE_RTL \

  PARAM_VALUE (PARAM_MAX_LAST_VALUE_RTL)

#define MIN_VIRTUAL_MAPPINGS \

  PARAM_VALUE (PARAM_MIN_VIRTUAL_MAPPINGS)

#define VIRTUAL_MAPPINGS_TO_SYMS_RATIO \

  PARAM_VALUE (PARAM_VIRTUAL_MAPPINGS_TO_SYMS_RATIO)

#define MAX_FIELDS_FOR_FIELD_SENSITIVE \

  ((size_t) PARAM_VALUE (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE))

#endif /* ! GCC_PARAMS_H */