gcc/params.h

   1 /* params.h - Run-time parameters.
   2    Copyright (C) 2001, 2003, 2004, 2005, 2007, 2008, 2009, 2010
   3    Free Software Foundation, Inc.
   4    Written by Mark Mitchell <mark@codesourcery.com>.
   5
   6 This file is part of GCC.
   7
   8 GCC is free software; you can redistribute it and/or modify it under
   9 the terms of the GNU General Public License as published by the Free
  10 Software Foundation; either version 3, or (at your option) any later
  11 version.
  12
  13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  15 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  16 for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with GCC; see the file COPYING3.  If not see
  20 <http://www.gnu.org/licenses/>.  */
  21
  22 /* This module provides a means for setting integral parameters
  23    dynamically.  Instead of encoding magic numbers in various places,
  24    use this module to organize all the magic numbers in a single
  25    place.  The values of the parameters can be set on the
  26    command-line, thereby providing a way to control the amount of
  27    effort spent on particular optimization passes, or otherwise tune
  28    the behavior of the compiler.
  29
  30    Since their values can be set on the command-line, these parameters
  31    should not be used for non-dynamic memory allocation.  */
  32
  33 #ifndef GCC_PARAMS_H
  34 #define GCC_PARAMS_H
  35
  36 /* No parameter shall have this value.  */
  37
  38 #define INVALID_PARAM_VAL (-1)
  39
  40 /* The information associated with each parameter.  */
  41
  42 typedef struct param_info
  43 {
  44   /* The name used with the `--param <name>=<value>' switch to set this
  45      value.  */
  46   const char *const option;
  47   /* The associated value.  */
  48   int value;
  49
  50   /* True if the parameter was explicitly set.  */
  51   bool set;
  52
  53   /* Minimum acceptable value.  */
  54   int min_value;
  55
  56   /* Maximum acceptable value, if greater than minimum  */
  57   int max_value;
  58
  59   /* A short description of the option.  */
  60   const char *const help;
  61 } param_info;
  62
  63 /* An array containing the compiler parameters and their current
  64    values.  */
  65
  66 extern param_info *compiler_params;
  67
  68 /* Returns the number of entries in the table, for the use by plugins.  */
  69 extern size_t get_num_compiler_params (void);
  70
  71 /* Add the N PARAMS to the current list of compiler parameters.  */
  72
  73 extern void add_params (const param_info params[], size_t n);
  74
  75 /* Set the VALUE associated with the parameter given by NAME.  */
  76
  77 extern void set_param_value (const char *name, int value);
  78
  79 \f
  80 /* The parameters in use by language-independent code.  */
  81
  82 typedef enum compiler_param
  83 {
  84 #define DEFPARAM(enumerator, option, msgid, default, min, max) \
  85   enumerator,
  86 #include "params.def"
  87 #undef DEFPARAM
  88   LAST_PARAM
  89 } compiler_param;
  90
  91 /* The value of the parameter given by ENUM.  Not an lvalue.  */
  92 #define PARAM_VALUE(ENUM) \
  93   ((int) compiler_params[(int) ENUM].value)
  94
  95 /* Set the value of the parameter given by NUM to VALUE, implicitly,
  96    if it has not been set explicitly by the user.  */
  97
  98 extern void maybe_set_param_value (compiler_param num, int value);
  99
 100 /* Set the default value of a parameter given by NUM to VALUE, before
 101    option processing.  */
 102
 103 extern void set_default_param_value (compiler_param num, int value);
 104
 105 /* True if the value of the parameter was explicitly changed.  Not an
 106    lvalue.  */
 107 #define PARAM_SET_P(ENUM) \
 108   ((bool) compiler_params[(int) ENUM].set)
 109
 110 /* Macros for the various parameters.  */
 111 #define STRUCT_REORG_COLD_STRUCT_RATIO \
 112   PARAM_VALUE (PARAM_STRUCT_REORG_COLD_STRUCT_RATIO)
 113 #define MAX_INLINE_INSNS_SINGLE \
 114   PARAM_VALUE (PARAM_MAX_INLINE_INSNS_SINGLE)
 115 #define MAX_INLINE_INSNS \
 116   PARAM_VALUE (PARAM_MAX_INLINE_INSNS)
 117 #define MAX_INLINE_SLOPE \
 118   PARAM_VALUE (PARAM_MAX_INLINE_SLOPE)
 119 #define MIN_INLINE_INSNS \
 120   PARAM_VALUE (PARAM_MIN_INLINE_INSNS)
 121 #define MAX_INLINE_INSNS_AUTO \
 122   PARAM_VALUE (PARAM_MAX_INLINE_INSNS_AUTO)
 123 #define MAX_VARIABLE_EXPANSIONS \
 124   PARAM_VALUE (PARAM_MAX_VARIABLE_EXPANSIONS)
 125 #define MIN_VECT_LOOP_BOUND \
 126   PARAM_VALUE (PARAM_MIN_VECT_LOOP_BOUND)
 127 #define MAX_DELAY_SLOT_INSN_SEARCH \
 128   PARAM_VALUE (PARAM_MAX_DELAY_SLOT_INSN_SEARCH)
 129 #define MAX_DELAY_SLOT_LIVE_SEARCH \
 130   PARAM_VALUE (PARAM_MAX_DELAY_SLOT_LIVE_SEARCH)
 131 #define MAX_PENDING_LIST_LENGTH \
 132   PARAM_VALUE (PARAM_MAX_PENDING_LIST_LENGTH)
 133 #define MAX_GCSE_MEMORY \
 134   ((size_t) PARAM_VALUE (PARAM_MAX_GCSE_MEMORY))
 135 #define GCSE_AFTER_RELOAD_PARTIAL_FRACTION \
 136   PARAM_VALUE (PARAM_GCSE_AFTER_RELOAD_PARTIAL_FRACTION)
 137 #define GCSE_AFTER_RELOAD_CRITICAL_FRACTION \
 138   PARAM_VALUE (PARAM_GCSE_AFTER_RELOAD_CRITICAL_FRACTION)
 139 #define GCSE_COST_DISTANCE_RATIO \
 140   PARAM_VALUE (PARAM_GCSE_COST_DISTANCE_RATIO)
 141 #define GCSE_UNRESTRICTED_COST \
 142   PARAM_VALUE (PARAM_GCSE_UNRESTRICTED_COST)
 143 #define MAX_HOIST_DEPTH \
 144   PARAM_VALUE (PARAM_MAX_HOIST_DEPTH)
 145 #define MAX_UNROLLED_INSNS \
 146   PARAM_VALUE (PARAM_MAX_UNROLLED_INSNS)
 147 #define MAX_SMS_LOOP_NUMBER \
 148   PARAM_VALUE (PARAM_MAX_SMS_LOOP_NUMBER)
 149 #define SMS_MAX_II_FACTOR \
 150   PARAM_VALUE (PARAM_SMS_MAX_II_FACTOR)
 151 #define SMS_DFA_HISTORY \
 152   PARAM_VALUE (PARAM_SMS_DFA_HISTORY)
 153 #define SMS_LOOP_AVERAGE_COUNT_THRESHOLD \
 154   PARAM_VALUE (PARAM_SMS_LOOP_AVERAGE_COUNT_THRESHOLD)
 155 #define INTEGER_SHARE_LIMIT \
 156   PARAM_VALUE (PARAM_INTEGER_SHARE_LIMIT)
 157 #define MAX_LAST_VALUE_RTL \
 158   PARAM_VALUE (PARAM_MAX_LAST_VALUE_RTL)
 159 #define MIN_VIRTUAL_MAPPINGS \
 160   PARAM_VALUE (PARAM_MIN_VIRTUAL_MAPPINGS)
 161 #define VIRTUAL_MAPPINGS_TO_SYMS_RATIO \
 162   PARAM_VALUE (PARAM_VIRTUAL_MAPPINGS_TO_SYMS_RATIO)
 163 #define MAX_FIELDS_FOR_FIELD_SENSITIVE \
 164   ((size_t) PARAM_VALUE (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE))
 165 #define MAX_SCHED_READY_INSNS \
 166   PARAM_VALUE (PARAM_MAX_SCHED_READY_INSNS)
 167 #define PREFETCH_LATENCY \
 168   PARAM_VALUE (PARAM_PREFETCH_LATENCY)
 169 #define SIMULTANEOUS_PREFETCHES \
 170   PARAM_VALUE (PARAM_SIMULTANEOUS_PREFETCHES)
 171 #define L1_CACHE_SIZE \
 172   PARAM_VALUE (PARAM_L1_CACHE_SIZE)
 173 #define L1_CACHE_LINE_SIZE \
 174   PARAM_VALUE (PARAM_L1_CACHE_LINE_SIZE)
 175 #define L2_CACHE_SIZE \
 176   PARAM_VALUE (PARAM_L2_CACHE_SIZE)
 177 #define USE_CANONICAL_TYPES \
 178   PARAM_VALUE (PARAM_USE_CANONICAL_TYPES)
 179 #define IRA_MAX_LOOPS_NUM \
 180   PARAM_VALUE (PARAM_IRA_MAX_LOOPS_NUM)
 181 #define IRA_MAX_CONFLICT_TABLE_SIZE \
 182   PARAM_VALUE (PARAM_IRA_MAX_CONFLICT_TABLE_SIZE)
 183 #define IRA_LOOP_RESERVED_REGS \
 184   PARAM_VALUE (PARAM_IRA_LOOP_RESERVED_REGS)
 185 #define SWITCH_CONVERSION_BRANCH_RATIO \
 186   PARAM_VALUE (PARAM_SWITCH_CONVERSION_BRANCH_RATIO)
 187 #define LOOP_INVARIANT_MAX_BBS_IN_LOOP \
 188   PARAM_VALUE (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP)
 189 #define SLP_MAX_INSNS_IN_BB \
 190   PARAM_VALUE (PARAM_SLP_MAX_INSNS_IN_BB)
 191 #define MIN_INSN_TO_PREFETCH_RATIO \
 192   PARAM_VALUE (PARAM_MIN_INSN_TO_PREFETCH_RATIO)
 193 #define PREFETCH_MIN_INSN_TO_MEM_RATIO \
 194   PARAM_VALUE (PARAM_PREFETCH_MIN_INSN_TO_MEM_RATIO)
 195 #define MIN_NONDEBUG_INSN_UID \
 196   PARAM_VALUE (PARAM_MIN_NONDEBUG_INSN_UID)
 197 #endif /* ! GCC_PARAMS_H */