gcc/optc-gen.awk

   1 #  Copyright (C) 2003, 2004, 2007, 2008, 2009, 2010, 2011
   2 #  Free Software Foundation, Inc.
   3 #  Contributed by Kelley Cook, June 2004.
   4 #  Original code from Neil Booth, May 2003.
   5 #
   6 # This program is free software; you can redistribute it and/or modify it
   7 # under the terms of the GNU General Public License as published by the
   8 # Free Software Foundation; either version 3, or (at your option) any
   9 # later version.
  10 #
  11 # This program is distributed in the hope that it will be useful,
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 # GNU General Public License for more details.
  15 #
  16 # You should have received a copy of the GNU General Public License
  17 # along with this program; see the file COPYING3.  If not see
  18 # <http://www.gnu.org/licenses/>.
  19
  20 # This Awk script reads in the option records generated from
  21 # opt-gather.awk, combines the flags of duplicate options and generates a
  22 # C file.
  23 #
  24
  25 # This program uses functions from opt-functions.awk and code from
  26 # opt-read.awk.
  27 #
  28 # Usage: awk -f opt-functions.awk -f opt-read.awk -f optc-gen.awk \
  29 #            [-v header_name=header.h] < inputfile > options.c
  30
  31 # Dump that array of options into a C file.
  32 END {
  33 print "/* This file is auto-generated by optc-gen.awk.  */"
  34 print ""
  35 n_headers = split(header_name, headers, " ")
  36 for (i = 1; i <= n_headers; i++)
  37         print "#include " quote headers[i] quote
  38 print "#include " quote "opts.h" quote
  39 print "#include " quote "intl.h" quote
  40 print "#include " quote "insn-attr-common.h" quote
  41 print ""
  42
  43 if (n_extra_c_includes > 0) {
  44         for (i = 0; i < n_extra_c_includes; i++) {
  45                 print "#include " quote extra_c_includes[i] quote
  46         }
  47         print ""
  48 }
  49
  50 for (i = 0; i < n_enums; i++) {
  51         name = enum_names[i]
  52         type = enum_type[name]
  53         print "static const struct cl_enum_arg cl_enum_" name \
  54             "_data[] = "
  55         print "{"
  56         print enum_data[name] "  { NULL, 0, 0 }"
  57         print "};"
  58         print ""
  59         print "static void"
  60         print "cl_enum_" name "_set (void *var, int value)"
  61         print "{"
  62         print "  *((" type " *) var) = (" type ") value;"
  63         print "}"
  64         print ""
  65         print "static int"
  66         print "cl_enum_" name "_get (const void *var)"
  67         print "{"
  68         print "  return (int) *((const " type " *) var);"
  69         print "}"
  70         print ""
  71 }
  72
  73 print "const struct cl_enum cl_enums[] ="
  74 print "{"
  75 for (i = 0; i < n_enums; i++) {
  76         name = enum_names[i]
  77         ehelp = enum_help[name]
  78         if (ehelp == "")
  79                 ehelp = "NULL"
  80         else
  81                 ehelp = quote ehelp quote
  82         unknown_error = enum_unknown_error[name]
  83         if (unknown_error == "")
  84                 unknown_error = "NULL"
  85         else
  86                 unknown_error = quote unknown_error quote
  87         print "  {"
  88         print "    " ehelp ","
  89         print "    " unknown_error ","
  90         print "    cl_enum_" name "_data,"
  91         print "    sizeof (" enum_type[name] "),"
  92         print "    cl_enum_" name "_set,"
  93         print "    cl_enum_" name "_get"
  94         print "  },"
  95 }
  96 print "};"
  97 print "const unsigned int cl_enums_count = " n_enums ";"
  98 print ""
  99
 100 print "const struct gcc_options global_options_init =\n{"
 101 for (i = 0; i < n_extra_vars; i++) {
 102         var = extra_vars[i]
 103         init = extra_vars[i]
 104         if (var ~ "=" ) {
 105                 sub(".*= *", "", init)
 106         } else {
 107                 init = "0"
 108         }
 109         sub(" *=.*", "", var)
 110         name = var
 111         sub("^.*[ *]", "", name)
 112         sub("\\[.*\\]$", "", name)
 113         var_seen[name] = 1
 114         print "  " init ", /* " name " */"
 115 }
 116 for (i = 0; i < n_opts; i++) {
 117         name = var_name(flags[i]);
 118         if (name == "")
 119                 continue;
 120
 121         init = opt_args("Init", flags[i])
 122         if (init != "") {
 123                 if (name in var_init && var_init[name] != init)
 124                         print "#error multiple initializers for " name
 125                 var_init[name] = init
 126         }
 127 }
 128 for (i = 0; i < n_opts; i++) {
 129         name = var_name(flags[i]);
 130         if (name == "")
 131                 continue;
 132
 133         if (name in var_seen)
 134                 continue;
 135
 136         if (name in var_init)
 137                 init = var_init[name]
 138         else
 139                 init = "0"
 140
 141         print "  " init ", /* " name " */"
 142
 143         var_seen[name] = 1;
 144 }
 145 for (i = 0; i < n_opts; i++) {
 146         name = static_var(opts[i], flags[i]);
 147         if (name != "") {
 148                 print "  0, /* " name " (private state) */"
 149                 print "#undef x_" name
 150         }
 151 }
 152 for (i = 0; i < n_opts; i++) {
 153         if (flag_set_p("SetByCombined", flags[i]))
 154                 print "  false, /* frontend_set_" var_name(flags[i]) " */"
 155 }
 156 print "};"
 157 print ""
 158 print "struct gcc_options global_options;"
 159 print "struct gcc_options global_options_set;"
 160 print ""
 161
 162 print "const char * const lang_names[] =\n{"
 163 for (i = 0; i < n_langs; i++) {
 164         macros[i] = "CL_" langs[i]
 165         gsub( "[^" alnum "_]", "X", macros[i] )
 166         s = substr("         ", length (macros[i]))
 167         print "  " quote langs[i] quote ","
 168     }
 169
 170 print "  0\n};\n"
 171 print "const unsigned int cl_options_count = N_OPTS;\n"
 172 print "#if (1U << " n_langs ") > CL_MIN_OPTION_CLASS"
 173 print "  #error the number of languages exceeds the implementation limit"
 174 print "#endif"
 175 print "const unsigned int cl_lang_count = " n_langs ";\n"
 176
 177 print "const struct cl_option cl_options[] =\n{"
 178
 179 j = 0
 180 for (i = 0; i < n_opts; i++) {
 181         back_chain[i] = "N_OPTS";
 182         indices[opts[i]] = j;
 183         # Combine the flags of identical switches.  Switches
 184         # appear many times if they are handled by many front
 185         # ends, for example.
 186         while( i + 1 != n_opts && opts[i] == opts[i + 1] ) {
 187                 flags[i + 1] = flags[i] " " flags[i + 1];
 188                 if (help[i + 1] == "")
 189                         help[i + 1] = help[i]
 190                 else if (help[i] != "" && help[i + 1] != help[i])
 191                         print "warning: multiple different help strings for " \
 192                                 opts[i] ":\n\t" help[i] "\n\t" help[i + 1] \
 193                                 | "cat 1>&2"
 194                 i++;
 195                 back_chain[i] = "N_OPTS";
 196                 indices[opts[i]] = j;
 197         }
 198         j++;
 199 }
 200
 201 for (i = 0; i < n_opts; i++) {
 202         # With identical flags, pick only the last one.  The
 203         # earlier loop ensured that it has all flags merged,
 204         # and a nonempty help text if one of the texts was nonempty.
 205         while( i + 1 != n_opts && opts[i] == opts[i + 1] ) {
 206                 i++;
 207         }
 208
 209         len = length (opts[i]);
 210         enum = opt_enum(opts[i])
 211
 212         # If this switch takes joined arguments, back-chain all
 213         # subsequent switches to it for which it is a prefix.  If
 214         # a later switch S is a longer prefix of a switch T, T
 215         # will be back-chained to S in a later iteration of this
 216         # for() loop, which is what we want.
 217         if (flag_set_p("Joined.*", flags[i])) {
 218                 for (j = i + 1; j < n_opts; j++) {
 219                         if (substr (opts[j], 1, len) != opts[i])
 220                                 break;
 221                         back_chain[j] = enum;
 222                 }
 223         }
 224
 225         s = substr("                                  ", length (opts[i]))
 226         if (i + 1 == n_opts)
 227                 comma = ""
 228
 229         if (help[i] == "")
 230                 hlp = "0"
 231         else
 232                 hlp = quote help[i] quote;
 233
 234         missing_arg_error = opt_args("MissingArgError", flags[i])
 235         if (missing_arg_error == "")
 236                 missing_arg_error = "0"
 237         else
 238                 missing_arg_error = quote missing_arg_error quote
 239
 240
 241         warn_message = opt_args("Warn", flags[i])
 242         if (warn_message == "")
 243                 warn_message = "0"
 244         else
 245                 warn_message = quote warn_message quote
 246
 247         alias_arg = opt_args("Alias", flags[i])
 248         if (alias_arg == "") {
 249                 if (flag_set_p("Ignore", flags[i]))
 250                         alias_data = "NULL, NULL, OPT_SPECIAL_ignore"
 251                 else
 252                         alias_data = "NULL, NULL, N_OPTS"
 253         } else {
 254                 alias_opt = nth_arg(0, alias_arg)
 255                 alias_posarg = nth_arg(1, alias_arg)
 256                 alias_negarg = nth_arg(2, alias_arg)
 257
 258                 if (var_ref(opts[i], flags[i]) != "-1")
 259                         print "#error Alias setting variable"
 260
 261                 if (alias_posarg != "" && alias_negarg == "") {
 262                         if (!flag_set_p("RejectNegative", flags[i]) \
 263                             && opts[i] ~ "^[Wfm]")
 264                                 print "#error Alias with single argument " \
 265                                         "allowing negative form"
 266                 }
 267                 if (alias_posarg != "" \
 268                     && flag_set_p("NegativeAlias", flags[i])) {
 269                         print "#error Alias with multiple arguments " \
 270                                 "used with NegativeAlias"
 271                 }
 272
 273                 alias_opt = opt_enum(alias_opt)
 274                 if (alias_posarg == "")
 275                         alias_posarg = "NULL"
 276                 else
 277                         alias_posarg = quote alias_posarg quote
 278                 if (alias_negarg == "")
 279                         alias_negarg = "NULL"
 280                 else
 281                         alias_negarg = quote alias_negarg quote
 282                 alias_data = alias_posarg ", " alias_negarg ", " alias_opt
 283         }
 284
 285         neg = opt_args("Negative", flags[i]);
 286         if (neg != "")
 287                 idx = indices[neg]
 288         else {
 289                 if (flag_set_p("RejectNegative", flags[i]))
 290                         idx = -1;
 291                 else {
 292                         if (opts[i] ~ "^[Wfm]")
 293                                 idx = indices[opts[i]];
 294                         else
 295                                 idx = -1;
 296                 }
 297         }
 298         # Split the printf after %u to work around an ia64-hp-hpux11.23
 299         # awk bug.
 300         printf("  { %c-%s%c,\n    %s,\n    %s,\n    %s,\n    %s, %s, %u,",
 301                quote, opts[i], quote, hlp, missing_arg_error, warn_message,
 302                alias_data, back_chain[i], len)
 303         printf(" %d,\n", idx)
 304         condition = opt_args("Condition", flags[i])
 305         cl_flags = switch_flags(flags[i])
 306         cl_bit_fields = switch_bit_fields(flags[i])
 307         cl_zero_bit_fields = switch_bit_fields("")
 308         if (condition != "")
 309                 printf("#if %s\n" \
 310                        "    %s,\n" \
 311                        "    0, %s,\n" \
 312                        "#else\n" \
 313                        "    0,\n" \
 314                        "    1 /* Disabled.  */, %s,\n" \
 315                        "#endif\n",
 316                        condition, cl_flags, cl_bit_fields, cl_zero_bit_fields)
 317         else
 318                 printf("    %s,\n" \
 319                        "    0, %s,\n",
 320                        cl_flags, cl_bit_fields)
 321         printf("    %s, %s }%s\n", var_ref(opts[i], flags[i]),
 322                var_set(flags[i]), comma)
 323 }
 324
 325 print "};"
 326
 327 }