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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 SALIAS_MAX_ARRAY_ELEMENTS \
+  PARAM_VALUE (PARAM_SALIAS_MAX_ARRAY_ELEMENTS)
+#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))
+#define MAX_SCHED_READY_INSNS \
+  PARAM_VALUE (PARAM_MAX_SCHED_READY_INSNS)
+#endif /* ! GCC_PARAMS_H */