gcc/opth-gen.awk

   1 #  Copyright (C) 2003,2004 Free Software Foundation, Inc.
   2 #  Contributed by Kelley Cook, June 2004.
   3 #  Original code from Neil Booth, May 2003.
   4 #
   5 # This program is free software; you can redistribute it and/or modify it
   6 # under the terms of the GNU General Public License as published by the
   7 # Free Software Foundation; either version 2, or (at your option) any
   8 # later version.
   9 #
  10 # This program is distributed in the hope that it will be useful,
  11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 # GNU General Public License for more details.
  14 #
  15 # You should have received a copy of the GNU General Public License
  16 # along with this program; if not, write to the Free Software
  17 # Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  18
  19 # This Awk script reads in the option records generated from
  20 # opt-gather.awk, combines the flags of duplicate options and generates a
  21 # C header file.
  22 #
  23 # This program uses functions from opt-functions.awk
  24 # Usage: awk -f opt-functions.awk -f opth-gen.awk < inputfile > options.h
  25
  26 BEGIN {
  27         n_opts = 0
  28         n_langs = 0
  29         n_extra_masks = 0
  30         quote = "\042"
  31         comma = ","
  32         FS=SUBSEP
  33 }
  34
  35 # Collect the text and flags of each option into an array
  36         {
  37                 if ($1 == "Language") {
  38                         langs[n_langs] = $2
  39                         n_langs++;
  40                 }
  41                 else {
  42                         name = opt_args("Mask", $1)
  43                         if (name == "") {
  44                                 opts[n_opts]  = $1
  45                                 flags[n_opts] = $2
  46                                 help[n_opts]  = $3
  47                                 n_opts++;
  48                         }
  49                         else {
  50                                 extra_masks[n_extra_masks++] = name
  51                         }
  52                 }
  53         }
  54
  55 # Dump out an enumeration into a .h file.
  56 # Combine the flags of duplicate options.
  57 END {
  58 print "/* This file is auto-generated by opts.sh.  */"
  59 print ""
  60 print "#ifndef OPTIONS_H"
  61 print "#define OPTIONS_H"
  62 print ""
  63 print "extern int target_flags;"
  64 print ""
  65
  66 for (i = 0; i < n_opts; i++) {
  67         name = var_name(flags[i]);
  68         if (name == "")
  69                 continue;
  70
  71         print "/* Set by -" opts[i] "."
  72         print "   " help[i] "  */"
  73         print "extern int " name ";"
  74         print ""
  75
  76     }
  77
  78 for (i = 0; i < n_opts; i++) {
  79         name = opt_args("Mask", flags[i])
  80         vname = var_name(flags[i])
  81         mask = "MASK_"
  82         if (vname != "") {
  83                 mask = "OPTION_MASK_"
  84         }
  85         if (name != "" && !flag_set_p("MaskExists", flags[i]))
  86                 print "#define " mask name " (1 << " masknum[vname]++ ")"
  87 }
  88 for (i = 0; i < n_extra_masks; i++) {
  89         print "#define MASK_" extra_masks[i] " (1 << " masknum[""]++ ")"
  90 }
  91
  92 for (var in masknum) {
  93         if (masknum[var] > 31) {
  94                 if (var == "")
  95                         print "#error too many target masks"
  96                 else
  97                         print "#error too many masks for " var
  98         }
  99 }
 100 print ""
 101
 102 for (i = 0; i < n_opts; i++) {
 103         name = opt_args("Mask", flags[i])
 104         vname = var_name(flags[i])
 105         macro = "OPTION_"
 106         mask = "OPTION_MASK_"
 107         if (vname == "") {
 108                 vname = "target_flags"
 109                 macro = "TARGET_"
 110                 mask = "MASK_"
 111         }
 112         if (name != "" && !flag_set_p("MaskExists", flags[i]))
 113                 print "#define " macro name \
 114                       " ((" vname " & " mask name ") != 0)"
 115 }
 116 for (i = 0; i < n_extra_masks; i++) {
 117         print "#define TARGET_" extra_masks[i] \
 118               " ((target_flags & MASK_" extra_masks[i] ") != 0)"
 119 }
 120 print ""
 121
 122 for (i = 0; i < n_opts; i++) {
 123         opt = opt_args("InverseMask", flags[i])
 124         if (opt ~ ",")
 125                 print "#define TARGET_" nth_arg(1, opt) \
 126                       " ((target_flags & MASK_" nth_arg(0, opt) ") == 0)"
 127 }
 128 print ""
 129
 130 for (i = 0; i < n_langs; i++) {
 131         macros[i] = "CL_" langs[i]
 132         gsub( "[^A-Za-z0-9_]", "X", macros[i] )
 133         s = substr("            ", length (macros[i]))
 134         print "#define " macros[i] s " (1 << " i ")"
 135     }
 136
 137 print ""
 138 print "enum opt_code"
 139 print "{"
 140
 141 for (i = 0; i < n_opts; i++)
 142         back_chain[i] = "N_OPTS";
 143
 144 for (i = 0; i < n_opts; i++) {
 145         # Combine the flags of identical switches.  Switches
 146         # appear many times if they are handled by many front
 147         # ends, for example.
 148         while( i + 1 != n_opts && opts[i] == opts[i + 1] ) {
 149                 flags[i + 1] = flags[i] " " flags[i + 1];
 150                 i++;
 151         }
 152
 153         len = length (opts[i]);
 154         enum = "OPT_" opts[i]
 155         if (opts[i] == "finline-limit=")
 156                 enum = enum "eq"
 157         gsub ("[^A-Za-z0-9]", "_", enum)
 158
 159         # If this switch takes joined arguments, back-chain all
 160         # subsequent switches to it for which it is a prefix.  If
 161         # a later switch S is a longer prefix of a switch T, T
 162         # will be back-chained to S in a later iteration of this
 163         # for() loop, which is what we want.
 164         if (flag_set_p("Joined.*", flags[i])) {
 165                 for (j = i + 1; j < n_opts; j++) {
 166                         if (substr (opts[j], 1, len) != opts[i])
 167                                 break;
 168                         back_chain[j] = enum;
 169                 }
 170         }
 171
 172         s = substr("                                     ", length (opts[i]))
 173         if (i + 1 == n_opts)
 174                 comma = ""
 175
 176         if (help[i] == "")
 177                 hlp = "0"
 178         else
 179                 hlp = "N_(\"" help[i] "\")";
 180
 181         print "  " enum "," s "/* -" opts[i] " */"
 182 }
 183
 184 print "  N_OPTS"
 185 print "};"
 186 print ""
 187 print "#endif /* OPTIONS_H */"
 188 }