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annotate gcc/params.c @ 67:f6334be47118

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update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
author nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
date Tue, 22 Mar 2011 17:18:12 +0900
parents 77e2b8dfacca
children 04ced10e8804
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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1 /* params.c - Run-time parameters.
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2 Copyright (C) 2001, 2003, 2004, 2005, 2007, 2008, 2009, 2010
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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 #include "config.h"
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23 #include "system.h"
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24 #include "coretypes.h"
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25 #include "tm.h"
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26 #include "params.h"
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27 #include "diagnostic-core.h"
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29 /* An array containing the compiler parameters and their current
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30 values. */
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31
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32 param_info *compiler_params;
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33
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34 /* The number of entries in the table. */
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35 static size_t num_compiler_params;
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36
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37 /* Whether the parameters have all been initialized and had their
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38 default values determined. */
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39 static bool params_finished;
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40
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41 /* Add the N PARAMS to the current list of compiler parameters. */
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42
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43 void
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44 add_params (const param_info params[], size_t n)
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45 {
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46 gcc_assert (!params_finished);
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47
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48 /* Allocate enough space for the new parameters. */
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49 compiler_params = XRESIZEVEC (param_info, compiler_params,
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50 num_compiler_params + n);
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51 /* Copy them into the table. */
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52 memcpy (compiler_params + num_compiler_params,
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53 params,
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54 n * sizeof (param_info));
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55 /* Keep track of how many parameters we have. */
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56 num_compiler_params += n;
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57 }
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58
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59 /* Note that all parameters have been added and all default values
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60 set. */
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62 void
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63 finish_params (void)
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64 {
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65 params_finished = true;
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66 }
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68 /* Set the value of the parameter given by NUM to VALUE in PARAMS and
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69 PARAMS_SET. If EXPLICIT_P, this is being set by the user;
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70 otherwise it is being set implicitly by the compiler. */
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72 static void
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73 set_param_value_internal (compiler_param num, int value,
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74 int *params, int *params_set,
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75 bool explicit_p)
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76 {
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77 size_t i = (size_t) num;
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79 gcc_assert (params_finished);
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81 params[i] = value;
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82 if (explicit_p)
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83 params_set[i] = true;
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84 }
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85
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86 /* Set the VALUE associated with the parameter given by NAME in PARAMS
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87 and PARAMS_SET. */
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88
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89 void
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90 set_param_value (const char *name, int value,
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91 int *params, int *params_set)
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92 {
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93 size_t i;
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94
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95 /* Make sure nobody tries to set a parameter to an invalid value. */
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96 gcc_assert (value != INVALID_PARAM_VAL);
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97
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98 /* Scan the parameter table to find a matching entry. */
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99 for (i = 0; i < num_compiler_params; ++i)
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100 if (strcmp (compiler_params[i].option, name) == 0)
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101 {
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102 if (value < compiler_params[i].min_value)
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103 error ("minimum value of parameter %qs is %u",
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104 compiler_params[i].option,
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105 compiler_params[i].min_value);
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106 else if (compiler_params[i].max_value > compiler_params[i].min_value
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107 && value > compiler_params[i].max_value)
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108 error ("maximum value of parameter %qs is %u",
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109 compiler_params[i].option,
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110 compiler_params[i].max_value);
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111 else
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112 set_param_value_internal ((compiler_param) i, value,
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113 params, params_set, true);
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114 return;
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115 }
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116
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117 /* If we didn't find this parameter, issue an error message. */
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118 error ("invalid parameter %qs", name);
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119 }
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120
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121 /* Set the value of the parameter given by NUM to VALUE in PARAMS and
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122 PARAMS_SET, implicitly, if it has not been set explicitly by the
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123 user. */
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124
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125 void
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126 maybe_set_param_value (compiler_param num, int value,
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127 int *params, int *params_set)
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128 {
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129 if (!params_set[(int) num])
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130 set_param_value_internal (num, value, params, params_set, false);
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131 }
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132
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133 /* Set the default value of a parameter given by NUM to VALUE, before
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134 option processing. */
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135
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136 void
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137 set_default_param_value (compiler_param num, int value)
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138 {
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139 gcc_assert (!params_finished);
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140
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141 compiler_params[(int) num].default_value = value;
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142 }
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143
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144 /* Return the default value of parameter NUM. */
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145
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146 int
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147 default_param_value (compiler_param num)
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148 {
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149 return compiler_params[(int) num].default_value;
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150 }
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151
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152 /* Initialize an array PARAMS with default values of the
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153 parameters. */
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154
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155 void
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156 init_param_values (int *params)
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157 {
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158 size_t i;
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159
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160 gcc_assert (params_finished);
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161
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162 for (i = 0; i < num_compiler_params; i++)
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163 params[i] = compiler_params[i].default_value;
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164 }
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165
55
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166 /* Return the current value of num_compiler_params, for the benefit of
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167 plugins that use parameters as features. */
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168
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169 size_t
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170 get_num_compiler_params (void)
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171 {
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172 return num_compiler_params;
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173 }