gcc/params.h

   1 /* params.h - Run-time parameters.
   2    Copyright (C) 2001-2013 Free Software Foundation, Inc.
   3    Written by Mark Mitchell <mark@codesourcery.com>.
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify it under
   8 the terms of the GNU General Public License as published by the Free
   9 Software Foundation; either version 3, or (at your option) any later
  10 version.
  11
  12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15 for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GCC; see the file COPYING3.  If not see
  19 <http://www.gnu.org/licenses/>.  */
  20
  21 /* This module provides a means for setting integral parameters
  22    dynamically.  Instead of encoding magic numbers in various places,
  23    use this module to organize all the magic numbers in a single
  24    place.  The values of the parameters can be set on the
  25    command-line, thereby providing a way to control the amount of
  26    effort spent on particular optimization passes, or otherwise tune
  27    the behavior of the compiler.
  28
  29    Since their values can be set on the command-line, these parameters
  30    should not be used for non-dynamic memory allocation.  */
  31
  32 #ifndef GCC_PARAMS_H
  33 #define GCC_PARAMS_H
  34
  35 /* No parameter shall have this value.  */
  36
  37 #define INVALID_PARAM_VAL (-1)
  38
  39 /* The information associated with each parameter.  */
  40
  41 typedef struct param_info
  42 {
  43   /* The name used with the `--param <name>=<value>' switch to set this
  44      value.  */
  45   const char *const option;
  46
  47   /* The default value.  */
  48   int default_value;
  49
  50   /* Minimum acceptable value.  */
  51   int min_value;
  52
  53   /* Maximum acceptable value, if greater than minimum  */
  54   int max_value;
  55
  56   /* A short description of the option.  */
  57   const char *const help;
  58 } param_info;
  59
  60 /* An array containing the compiler parameters and their current
  61    values.  */
  62
  63 extern param_info *compiler_params;
  64
  65 /* Returns the number of entries in the table, for the use by plugins.  */
  66 extern size_t get_num_compiler_params (void);
  67
  68 /* Add the N PARAMS to the current list of compiler parameters.  */
  69
  70 extern void add_params (const param_info params[], size_t n);
  71
  72 /* Set the VALUE associated with the parameter given by NAME in the
  73    table PARAMS using PARAMS_SET to indicate which have been
  74    explicitly set.  */
  75
  76 extern void set_param_value (const char *name, int value,
  77                              int *params, int *params_set);
  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) global_options.x_param_values[(int) ENUM])
  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, in the table PARAMS
  97    using PARAMS_SET to indicate which have been explicitly set.  */
  98
  99 extern void maybe_set_param_value (compiler_param num, int value,
 100                                    int *params, int *params_set);
 101
 102 /* Set the default value of a parameter given by NUM to VALUE, before
 103    option processing.  */
 104
 105 extern void set_default_param_value (compiler_param num, int value);
 106
 107 /* Add all parameters and default values that can be set in both the
 108    driver and the compiler proper.  */
 109
 110 extern void global_init_params (void);
 111
 112 /* Note that all parameters have been added and all default values
 113    set.  */
 114 extern void finish_params (void);
 115
 116 /* Return the default value of parameter NUM.  */
 117
 118 extern int default_param_value (compiler_param num);
 119
 120 /* Initialize an array PARAMS with default values of the
 121    parameters.  */
 122 extern void init_param_values (int *params);
 123
 124 /* Macros for the various parameters.  */
 125 #define MAX_INLINE_INSNS_SINGLE \
 126   PARAM_VALUE (PARAM_MAX_INLINE_INSNS_SINGLE)
 127 #define MAX_INLINE_INSNS \
 128   PARAM_VALUE (PARAM_MAX_INLINE_INSNS)
 129 #define MAX_INLINE_SLOPE \
 130   PARAM_VALUE (PARAM_MAX_INLINE_SLOPE)
 131 #define MIN_INLINE_INSNS \
 132   PARAM_VALUE (PARAM_MIN_INLINE_INSNS)
 133 #define MAX_INLINE_INSNS_AUTO \
 134   PARAM_VALUE (PARAM_MAX_INLINE_INSNS_AUTO)
 135 #define MAX_VARIABLE_EXPANSIONS \
 136   PARAM_VALUE (PARAM_MAX_VARIABLE_EXPANSIONS)
 137 #define MIN_VECT_LOOP_BOUND \
 138   PARAM_VALUE (PARAM_MIN_VECT_LOOP_BOUND)
 139 #define MAX_DELAY_SLOT_INSN_SEARCH \
 140   PARAM_VALUE (PARAM_MAX_DELAY_SLOT_INSN_SEARCH)
 141 #define MAX_DELAY_SLOT_LIVE_SEARCH \
 142   PARAM_VALUE (PARAM_MAX_DELAY_SLOT_LIVE_SEARCH)
 143 #define MAX_PENDING_LIST_LENGTH \
 144   PARAM_VALUE (PARAM_MAX_PENDING_LIST_LENGTH)
 145 #define MAX_GCSE_MEMORY \
 146   ((size_t) PARAM_VALUE (PARAM_MAX_GCSE_MEMORY))
 147 #define MAX_GCSE_INSERTION_RATIO \
 148   ((size_t) PARAM_VALUE (PARAM_MAX_GCSE_INSERTION_RATIO))
 149 #define GCSE_AFTER_RELOAD_PARTIAL_FRACTION \
 150   PARAM_VALUE (PARAM_GCSE_AFTER_RELOAD_PARTIAL_FRACTION)
 151 #define GCSE_AFTER_RELOAD_CRITICAL_FRACTION \
 152   PARAM_VALUE (PARAM_GCSE_AFTER_RELOAD_CRITICAL_FRACTION)
 153 #define GCSE_COST_DISTANCE_RATIO \
 154   PARAM_VALUE (PARAM_GCSE_COST_DISTANCE_RATIO)
 155 #define GCSE_UNRESTRICTED_COST \
 156   PARAM_VALUE (PARAM_GCSE_UNRESTRICTED_COST)
 157 #define MAX_HOIST_DEPTH \
 158   PARAM_VALUE (PARAM_MAX_HOIST_DEPTH)
 159 #define MAX_UNROLLED_INSNS \
 160   PARAM_VALUE (PARAM_MAX_UNROLLED_INSNS)
 161 #define MAX_SMS_LOOP_NUMBER \
 162   PARAM_VALUE (PARAM_MAX_SMS_LOOP_NUMBER)
 163 #define SMS_MAX_II_FACTOR \
 164   PARAM_VALUE (PARAM_SMS_MAX_II_FACTOR)
 165 #define SMS_DFA_HISTORY \
 166   PARAM_VALUE (PARAM_SMS_DFA_HISTORY)
 167 #define SMS_LOOP_AVERAGE_COUNT_THRESHOLD \
 168   PARAM_VALUE (PARAM_SMS_LOOP_AVERAGE_COUNT_THRESHOLD)
 169 #define INTEGER_SHARE_LIMIT \
 170   PARAM_VALUE (PARAM_INTEGER_SHARE_LIMIT)
 171 #define MAX_LAST_VALUE_RTL \
 172   PARAM_VALUE (PARAM_MAX_LAST_VALUE_RTL)
 173 #define MIN_VIRTUAL_MAPPINGS \
 174   PARAM_VALUE (PARAM_MIN_VIRTUAL_MAPPINGS)
 175 #define VIRTUAL_MAPPINGS_TO_SYMS_RATIO \
 176   PARAM_VALUE (PARAM_VIRTUAL_MAPPINGS_TO_SYMS_RATIO)
 177 #define MAX_FIELDS_FOR_FIELD_SENSITIVE \
 178   ((size_t) PARAM_VALUE (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE))
 179 #define MAX_SCHED_READY_INSNS \
 180   PARAM_VALUE (PARAM_MAX_SCHED_READY_INSNS)
 181 #define PREFETCH_LATENCY \
 182   PARAM_VALUE (PARAM_PREFETCH_LATENCY)
 183 #define SIMULTANEOUS_PREFETCHES \
 184   PARAM_VALUE (PARAM_SIMULTANEOUS_PREFETCHES)
 185 #define L1_CACHE_SIZE \
 186   PARAM_VALUE (PARAM_L1_CACHE_SIZE)
 187 #define L1_CACHE_LINE_SIZE \
 188   PARAM_VALUE (PARAM_L1_CACHE_LINE_SIZE)
 189 #define L2_CACHE_SIZE \
 190   PARAM_VALUE (PARAM_L2_CACHE_SIZE)
 191 #define USE_CANONICAL_TYPES \
 192   PARAM_VALUE (PARAM_USE_CANONICAL_TYPES)
 193 #define IRA_MAX_LOOPS_NUM \
 194   PARAM_VALUE (PARAM_IRA_MAX_LOOPS_NUM)
 195 #define IRA_MAX_CONFLICT_TABLE_SIZE \
 196   PARAM_VALUE (PARAM_IRA_MAX_CONFLICT_TABLE_SIZE)
 197 #define IRA_LOOP_RESERVED_REGS \
 198   PARAM_VALUE (PARAM_IRA_LOOP_RESERVED_REGS)
 199 #define SWITCH_CONVERSION_BRANCH_RATIO \
 200   PARAM_VALUE (PARAM_SWITCH_CONVERSION_BRANCH_RATIO)
 201 #define LOOP_INVARIANT_MAX_BBS_IN_LOOP \
 202   PARAM_VALUE (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP)
 203 #define SLP_MAX_INSNS_IN_BB \
 204   PARAM_VALUE (PARAM_SLP_MAX_INSNS_IN_BB)
 205 #define MIN_INSN_TO_PREFETCH_RATIO \
 206   PARAM_VALUE (PARAM_MIN_INSN_TO_PREFETCH_RATIO)
 207 #define PREFETCH_MIN_INSN_TO_MEM_RATIO \
 208   PARAM_VALUE (PARAM_PREFETCH_MIN_INSN_TO_MEM_RATIO)
 209 #define MIN_NONDEBUG_INSN_UID \
 210   PARAM_VALUE (PARAM_MIN_NONDEBUG_INSN_UID)
 211 #define MAX_STORES_TO_SINK \
 212   PARAM_VALUE (PARAM_MAX_STORES_TO_SINK)
 213 #define ALLOW_LOAD_DATA_RACES \
 214   PARAM_VALUE (PARAM_ALLOW_LOAD_DATA_RACES)
 215 #define ALLOW_STORE_DATA_RACES \
 216   PARAM_VALUE (PARAM_ALLOW_STORE_DATA_RACES)
 217 #define ALLOW_PACKED_LOAD_DATA_RACES \
 218   PARAM_VALUE (PARAM_ALLOW_PACKED_LOAD_DATA_RACES)
 219 #define ALLOW_PACKED_STORE_DATA_RACES \
 220   PARAM_VALUE (PARAM_ALLOW_PACKED_STORE_DATA_RACES)
 221
 222 #endif /* ! GCC_PARAMS_H */