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1 # Copyright (C) 2013-2020 Free Software Foundation, Inc.
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2 #
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3 # This program is free software; you can redistribute it and/or modify it
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4 # under the terms of the GNU General Public License as published by the
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5 # Free Software Foundation; either version 3, or (at your option) any
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6 # later version.
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7 #
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8 # This program is distributed in the hope that it will be useful,
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9 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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10 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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11 # GNU General Public License for more details.
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12 #
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13 # You should have received a copy of the GNU General Public License
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14 # along with this program; see the file COPYING3. If not see
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15 # <http://www.gnu.org/licenses/>.
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16
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17 # This Awk script takes passes.def and writes pass-instances.def,
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18 # counting the instances of each kind of pass, adding an instance number
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19 # to everywhere that NEXT_PASS is used.
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20 # Also handle INSERT_PASS_AFTER, INSERT_PASS_BEFORE and REPLACE_PASS
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21 # directives.
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22 #
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23 # For example, the single-instanced pass:
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24 # NEXT_PASS (pass_warn_unused_result);
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25 # becomes this in the output:
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26 # NEXT_PASS (pass_warn_unused_result, 1);
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27 #
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28 # The various instances of
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29 # NEXT_PASS (pass_copy_prop);
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30 # become:
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31 # NEXT_PASS (pass_copy_prop, 1);
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32 # through:
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33 # NEXT_PASS (pass_copy_prop, 8);
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34 # (currently there are 8 instances of that pass)
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35 #
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36 # INSERT_PASS_AFTER (pass_copy_prop, 1, pass_stv);
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37 # will insert
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38 # NEXT_PASS (pass_stv, 1);
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39 # immediately after the NEXT_PASS (pass_copy_prop, 1) line,
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40 # similarly INSERT_PASS_BEFORE inserts immediately before that line.
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41 # REPLACE_PASS (pass_copy_prop, 1, pass_stv, true);
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42 # will replace NEXT_PASS (pass_copy_prop, 1) line with
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43 # NEXT_PASS (pass_stv, 1, true);
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44 # line and renumber all higher pass_copy_prop instances if any.
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45
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46 # Usage: awk -f gen-pass-instances.awk passes.def
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47
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48 BEGIN {
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49 print "/* This file is auto-generated by gen-pass-instances.awk";
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50 print " from passes.def. */";
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51 lineno = 1;
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52 }
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53
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54 function parse_line(line, fnname, len_of_call, len_of_start,
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55 len_of_open, len_of_close,
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56 len_of_args, args_start_at,
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57 args_str, len_of_prefix,
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58 call_starts_at,
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59 postfix_starts_at)
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60 {
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61 # Find call expression.
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62 call_starts_at = match(line, fnname " \\(.+\\)");
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63 if (call_starts_at == 0)
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64 return 0;
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65
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66 # Length of the call expression.
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67 len_of_call = RLENGTH;
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68
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69 len_of_start = length(fnname " (");
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70 len_of_open = length("(");
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71 len_of_close = length(")");
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72
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73 # Find arguments
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74 len_of_args = len_of_call - (len_of_start + len_of_close);
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75 args_start_at = call_starts_at + len_of_start;
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76 args_str = substr(line, args_start_at, len_of_args);
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77 split(args_str, args, ",");
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78
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79 # Find call expression prefix
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80 len_of_prefix = call_starts_at - 1;
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81 prefix = substr(line, 1, len_of_prefix);
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82
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83 # Find call expression postfix
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84 postfix_starts_at = call_starts_at + len_of_call;
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85 postfix = substr(line, postfix_starts_at);
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86 return 1;
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87 }
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88
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89 function adjust_linenos(above, increment, p, i)
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90 {
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91 for (p in pass_lines)
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92 if (pass_lines[p] >= above)
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93 pass_lines[p] += increment;
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94 if (increment > 0)
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95 for (i = lineno - 1; i >= above; i--)
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96 lines[i + increment] = lines[i];
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97 else
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98 for (i = above; i < lineno; i++)
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99 lines[i + increment] = lines[i];
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100 lineno += increment;
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101 }
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102
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103 function insert_remove_pass(line, fnname, arg3)
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104 {
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105 parse_line($0, fnname);
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106 pass_name = args[1];
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107 if (pass_name == "PASS")
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108 return 1;
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109 pass_num = args[2] + 0;
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110 arg3 = args[3];
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111 sub(/^[ \t]*/, "", arg3);
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112 new_line = prefix "NEXT_PASS (" arg3;
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113 if (args[4])
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114 new_line = new_line "," args[4];
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115 new_line = new_line ")" postfix;
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116 if (!pass_lines[pass_name, pass_num])
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117 {
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118 print "ERROR: Can't locate instance of the pass mentioned in " fnname;
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119 return 1;
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120 }
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121 return 0;
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122 }
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123
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124 function insert_pass(line, fnname, after, num)
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125 {
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126 if (insert_remove_pass(line, fnname))
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127 return;
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128 num = pass_lines[pass_name, pass_num];
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129 adjust_linenos(num + after, 1);
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130 pass_name = args[3];
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131 # Set pass_counts
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132 if (args[3] in pass_counts)
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133 pass_counts[pass_name]++;
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134 else
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135 pass_counts[pass_name] = 1;
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136
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137 pass_lines[pass_name, pass_counts[pass_name]] = num + after;
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138 lines[num + after] = new_line;
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139 }
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140
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141 function replace_pass(line, fnname, num, i)
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142 {
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143 if (insert_remove_pass(line, "REPLACE_PASS"))
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144 return;
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145 num = pass_lines[pass_name, pass_num];
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146 for (i = pass_counts[pass_name]; i > pass_num; i--)
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147 pass_lines[pass_name, i - 1] = pass_lines[pass_name, i];
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148 delete pass_lines[pass_name, pass_counts[pass_name]];
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149 if (pass_counts[pass_name] == 1)
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150 delete pass_counts[pass_name];
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151 else
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152 pass_counts[pass_name]--;
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153
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154 pass_name = args[3];
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155 # Set pass_counts
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156 if (args[3] in pass_counts)
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157 pass_counts[pass_name]++;
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158 else
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159 pass_counts[pass_name] = 1;
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160
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161 pass_lines[pass_name, pass_counts[pass_name]] = num;
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162 lines[num] = new_line;
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163 }
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164
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165 /INSERT_PASS_AFTER \(.+\)/ {
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166 insert_pass($0, "INSERT_PASS_AFTER", 1);
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167 next;
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168 }
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169
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170 /INSERT_PASS_BEFORE \(.+\)/ {
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171 insert_pass($0, "INSERT_PASS_BEFORE", 0);
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172 next;
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173 }
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174
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175 /REPLACE_PASS \(.+\)/ {
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176 replace_pass($0, "REPLACE_PASS");
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177 next;
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178 }
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179
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180 {
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181 ret = parse_line($0, "NEXT_PASS");
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182 if (ret)
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183 {
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184 pass_name = args[1];
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185
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186 # Set pass_counts
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187 if (pass_name in pass_counts)
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188 pass_counts[pass_name]++;
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189 else
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190 pass_counts[pass_name] = 1;
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191
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192 pass_lines[pass_name, pass_counts[pass_name]] = lineno;
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193 }
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194 lines[lineno++] = $0;
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195 }
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196
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197 END {
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198 for (i = 1; i < lineno; i++)
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199 {
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200 ret = parse_line(lines[i], "NEXT_PASS");
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201 if (ret)
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202 {
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203 # Set pass_name argument, an optional with_arg argument
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204 pass_name = args[1];
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205 with_arg = args[2];
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206
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207 # Set pass_final_counts
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208 if (pass_name in pass_final_counts)
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209 pass_final_counts[pass_name]++;
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210 else
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211 pass_final_counts[pass_name] = 1;
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212
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213 pass_num = pass_final_counts[pass_name];
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214
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215 # Print call expression with extra pass_num argument
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216 printf "%s", prefix;
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217 if (with_arg)
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218 printf "NEXT_PASS_WITH_ARG";
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219 else
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220 printf "NEXT_PASS";
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221 printf " (%s, %s", pass_name, pass_num;
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222 if (with_arg)
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223 printf ",%s", with_arg;
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224 printf ")%s\n", postfix;
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225 }
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226 else
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227 print lines[i];
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228 }
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229 }
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230
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231 # Local Variables:
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232 # mode:awk
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233 # c-basic-offset:8
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234 # End:
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