gcc/opth-gen.awk

   1 #  Copyright (C) 2003,2004,2005,2006,2007 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 3, 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; see the file COPYING3.  If not see
  17 # <http://www.gnu.org/licenses/>.
  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 opth-gen.awk.  */"
  59 print ""
  60 print "#ifndef OPTIONS_H"
  61 print "#define OPTIONS_H"
  62 print ""
  63 print "extern int target_flags;"
  64 print "extern int target_flags_explicit;"
  65 print ""
  66
  67 for (i = 0; i < n_opts; i++) {
  68         name = var_name(flags[i]);
  69         if (name == "")
  70                 continue;
  71
  72         print "extern " var_type(flags[i]) name ";"
  73 }
  74 print ""
  75
  76 for (i = 0; i < n_opts; i++) {
  77         name = opt_args("Mask", flags[i])
  78         vname = var_name(flags[i])
  79         mask = "MASK_"
  80         if (vname != "") {
  81                 mask = "OPTION_MASK_"
  82         }
  83         if (name != "" && !flag_set_p("MaskExists", flags[i]))
  84                 print "#define " mask name " (1 << " masknum[vname]++ ")"
  85 }
  86 for (i = 0; i < n_extra_masks; i++) {
  87         print "#define MASK_" extra_masks[i] " (1 << " masknum[""]++ ")"
  88 }
  89
  90 for (var in masknum) {
  91         if (masknum[var] > 31) {
  92                 if (var == "")
  93                         print "#error too many target masks"
  94                 else
  95                         print "#error too many masks for " var
  96         }
  97 }
  98 print ""
  99
 100 for (i = 0; i < n_opts; i++) {
 101         name = opt_args("Mask", flags[i])
 102         vname = var_name(flags[i])
 103         macro = "OPTION_"
 104         mask = "OPTION_MASK_"
 105         if (vname == "") {
 106                 vname = "target_flags"
 107                 macro = "TARGET_"
 108                 mask = "MASK_"
 109         }
 110         if (name != "" && !flag_set_p("MaskExists", flags[i]))
 111                 print "#define " macro name \
 112                       " ((" vname " & " mask name ") != 0)"
 113 }
 114 for (i = 0; i < n_extra_masks; i++) {
 115         print "#define TARGET_" extra_masks[i] \
 116               " ((target_flags & MASK_" extra_masks[i] ") != 0)"
 117 }
 118 print ""
 119
 120 for (i = 0; i < n_opts; i++) {
 121         opt = opt_args("InverseMask", flags[i])
 122         if (opt ~ ",") {
 123                 vname = var_name(flags[i])
 124                 macro = "OPTION_"
 125                 mask = "OPTION_MASK_"
 126                 if (vname == "") {
 127                         vname = "target_flags"
 128                         macro = "TARGET_"
 129                         mask = "MASK_"
 130                 }
 131                 print "#define " macro nth_arg(1, opt) \
 132                       " ((" vname " & " mask nth_arg(0, opt) ") == 0)"
 133         }
 134 }
 135 print ""
 136
 137 for (i = 0; i < n_langs; i++) {
 138         macros[i] = "CL_" langs[i]
 139         gsub( "[^A-Za-z0-9_]", "X", macros[i] )
 140         s = substr("            ", length (macros[i]))
 141         print "#define " macros[i] s " (1 << " i ")"
 142     }
 143 print "#define CL_LANG_ALL   ((1 << " n_langs ") - 1)"
 144
 145 print ""
 146 print "enum opt_code"
 147 print "{"
 148
 149 for (i = 0; i < n_opts; i++)
 150         back_chain[i] = "N_OPTS";
 151
 152 for (i = 0; i < n_opts; i++) {
 153         # Combine the flags of identical switches.  Switches
 154         # appear many times if they are handled by many front
 155         # ends, for example.
 156         while( i + 1 != n_opts && opts[i] == opts[i + 1] ) {
 157                 flags[i + 1] = flags[i] " " flags[i + 1];
 158                 i++;
 159         }
 160
 161         len = length (opts[i]);
 162         enum = "OPT_" opts[i]
 163         if (opts[i] == "finline-limit=")
 164                 enum = enum "eq"
 165         gsub ("[^A-Za-z0-9]", "_", enum)
 166
 167         # If this switch takes joined arguments, back-chain all
 168         # subsequent switches to it for which it is a prefix.  If
 169         # a later switch S is a longer prefix of a switch T, T
 170         # will be back-chained to S in a later iteration of this
 171         # for() loop, which is what we want.
 172         if (flag_set_p("Joined.*", flags[i])) {
 173                 for (j = i + 1; j < n_opts; j++) {
 174                         if (substr (opts[j], 1, len) != opts[i])
 175                                 break;
 176                         back_chain[j] = enum;
 177                 }
 178         }
 179
 180         s = substr("                                     ", length (opts[i]))
 181         if (i + 1 == n_opts)
 182                 comma = ""
 183
 184         if (help[i] == "")
 185                 hlp = "0"
 186         else
 187                 hlp = "N_(\"" help[i] "\")";
 188
 189         print "  " enum "," s "/* -" opts[i] " */"
 190 }
 191
 192 print "  N_OPTS"
 193 print "};"
 194 print ""
 195 print "#endif /* OPTIONS_H */"
 196 }