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