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, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 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 "extern " var_type(flags[i]) name ";"
  72 }
  73 print ""
  74
  75 for (i = 0; i < n_opts; i++) {
  76         name = opt_args("Mask", flags[i])
  77         vname = var_name(flags[i])
  78         mask = "MASK_"
  79         if (vname != "") {
  80                 mask = "OPTION_MASK_"
  81         }
  82         if (name != "" && !flag_set_p("MaskExists", flags[i]))
  83                 print "#define " mask name " (1 << " masknum[vname]++ ")"
  84 }
  85 for (i = 0; i < n_extra_masks; i++) {
  86         print "#define MASK_" extra_masks[i] " (1 << " masknum[""]++ ")"
  87 }
  88
  89 for (var in masknum) {
  90         if (masknum[var] > 31) {
  91                 if (var == "")
  92                         print "#error too many target masks"
  93                 else
  94                         print "#error too many masks for " var
  95         }
  96 }
  97 print ""
  98
  99 for (i = 0; i < n_opts; i++) {
 100         name = opt_args("Mask", flags[i])
 101         vname = var_name(flags[i])
 102         macro = "OPTION_"
 103         mask = "OPTION_MASK_"
 104         if (vname == "") {
 105                 vname = "target_flags"
 106                 macro = "TARGET_"
 107                 mask = "MASK_"
 108         }
 109         if (name != "" && !flag_set_p("MaskExists", flags[i]))
 110                 print "#define " macro name \
 111                       " ((" vname " & " mask name ") != 0)"
 112 }
 113 for (i = 0; i < n_extra_masks; i++) {
 114         print "#define TARGET_" extra_masks[i] \
 115               " ((target_flags & MASK_" extra_masks[i] ") != 0)"
 116 }
 117 print ""
 118
 119 for (i = 0; i < n_opts; i++) {
 120         opt = opt_args("InverseMask", flags[i])
 121         if (opt ~ ",")
 122                 print "#define TARGET_" nth_arg(1, opt) \
 123                       " ((target_flags & MASK_" nth_arg(0, opt) ") == 0)"
 124 }
 125 print ""
 126
 127 for (i = 0; i < n_langs; i++) {
 128         macros[i] = "CL_" langs[i]
 129         gsub( "[^A-Za-z0-9_]", "X", macros[i] )
 130         s = substr("            ", length (macros[i]))
 131         print "#define " macros[i] s " (1 << " i ")"
 132     }
 133
 134 print ""
 135 print "enum opt_code"
 136 print "{"
 137
 138 for (i = 0; i < n_opts; i++)
 139         back_chain[i] = "N_OPTS";
 140
 141 for (i = 0; i < n_opts; i++) {
 142         # Combine the flags of identical switches.  Switches
 143         # appear many times if they are handled by many front
 144         # ends, for example.
 145         while( i + 1 != n_opts && opts[i] == opts[i + 1] ) {
 146                 flags[i + 1] = flags[i] " " flags[i + 1];
 147                 i++;
 148         }
 149
 150         len = length (opts[i]);
 151         enum = "OPT_" opts[i]
 152         if (opts[i] == "finline-limit=")
 153                 enum = enum "eq"
 154         gsub ("[^A-Za-z0-9]", "_", enum)
 155
 156         # If this switch takes joined arguments, back-chain all
 157         # subsequent switches to it for which it is a prefix.  If
 158         # a later switch S is a longer prefix of a switch T, T
 159         # will be back-chained to S in a later iteration of this
 160         # for() loop, which is what we want.
 161         if (flag_set_p("Joined.*", flags[i])) {
 162                 for (j = i + 1; j < n_opts; j++) {
 163                         if (substr (opts[j], 1, len) != opts[i])
 164                                 break;
 165                         back_chain[j] = enum;
 166                 }
 167         }
 168
 169         s = substr("                                     ", length (opts[i]))
 170         if (i + 1 == n_opts)
 171                 comma = ""
 172
 173         if (help[i] == "")
 174                 hlp = "0"
 175         else
 176                 hlp = "N_(\"" help[i] "\")";
 177
 178         print "  " enum "," s "/* -" opts[i] " */"
 179 }
 180
 181 print "  N_OPTS"
 182 print "};"
 183 print ""
 184 print "#endif /* OPTIONS_H */"
 185 }