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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.  */
+
+#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)
+
+#endif /* PARAMS_H */