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         quote = "\042"
  30         comma = ","
  31         FS=SUBSEP
  32 }
  33
  34 # Collect the text and flags of each option into an array
  35         {
  36                 if ($1 == "Language") {
  37                         langs[n_langs] = $2
  38                         n_langs++;
  39                 }
  40                 else {
  41                         opts[n_opts]  = $1
  42                         flags[n_opts] = $2
  43                         help[n_opts]  = $3
  44                         n_opts++;
  45                 }
  46         }
  47
  48 # Dump out an enumeration into a .h file.
  49 # Combine the flags of duplicate options.
  50 END {
  51 print "/* This file is auto-generated by opts.sh.  */"
  52 print ""
  53 print "#ifndef OPTIONS_H"
  54 print "#define OPTIONS_H"
  55 print ""
  56 print "extern int target_flags;"
  57
  58 for (i = 0; i < n_opts; i++) {
  59         name = var_name(flags[i]);
  60         if (name == "")
  61                 continue;
  62
  63         print "/* Set by -" opts[i] "."
  64         print "   " help[i] "  */"
  65         print "extern int " name ";"
  66         print ""
  67
  68     }
  69
  70 masknum = 0
  71 for (i = 0; i < n_opts; i++) {
  72         name = opt_args("Mask", flags[i])
  73         if (name != "" && !flag_set_p("MaskExists", flags[i]))
  74                 print "#define MASK_" name " (1 << " masknum++ ")"
  75 }
  76 if (masknum > 31)
  77         print "#error too many target masks"
  78 print ""
  79
  80 for (i = 0; i < n_opts; i++) {
  81         name = opt_args("Mask", flags[i])
  82         if (name != "" && !flag_set_p("MaskExists", flags[i]))
  83                 print "#define TARGET_" name \
  84                       " ((target_flags & MASK_" name ") != 0)"
  85 }
  86 print ""
  87
  88 for (i = 0; i < n_opts; i++) {
  89         opt = opt_args("InverseMask", flags[i])
  90         if (opt ~ ",")
  91                 print "#define TARGET_" nth_arg(1, opt) \
  92                       " ((target_flags & MASK_" nth_arg(0, opt) ") == 0)"
  93 }
  94 print ""
  95
  96 for (i = 0; i < n_langs; i++) {
  97         macros[i] = "CL_" langs[i]
  98         gsub( "[^A-Za-z0-9_]", "X", macros[i] )
  99         s = substr("            ", length (macros[i]))
 100         print "#define " macros[i] s " (1 << " i ")"
 101     }
 102
 103 print ""
 104 print "enum opt_code"
 105 print "{"
 106
 107 for (i = 0; i < n_opts; i++)
 108         back_chain[i] = "N_OPTS";
 109
 110         for (i = 0; i < n_opts; i++) {
 111                 # Combine the flags of identical switches.  Switches
 112                 # appear many times if they are handled by many front
 113                 # ends, for example.
 114                 while( i + 1 != n_opts && opts[i] == opts[i + 1] ) {
 115                         flags[i + 1] = flags[i] " " flags[i + 1];
 116                         i++;
 117                 }
 118
 119         len = length (opts[i]);
 120         enum = "OPT_" opts[i]
 121         if (opts[i] == "finline-limit=")
 122                 enum = enum "eq"
 123         gsub ("[^A-Za-z0-9]", "_", enum)
 124
 125         # If this switch takes joined arguments, back-chain all
 126         # subsequent switches to it for which it is a prefix.  If
 127         # a later switch S is a longer prefix of a switch T, T
 128         # will be back-chained to S in a later iteration of this
 129         # for() loop, which is what we want.
 130         if (flag_set_p("Joined.*", flags[i])) {
 131                 for (j = i + 1; j < n_opts; j++) {
 132                         if (substr (opts[j], 1, len) != opts[i])
 133                                 break;
 134                         back_chain[j] = enum;
 135                 }
 136         }
 137
 138         s = substr("                                     ", length (opts[i]))
 139         if (i + 1 == n_opts)
 140                 comma = ""
 141
 142         if (help[i] == "")
 143                 hlp = "0"
 144         else
 145                 hlp = "N_(\"" help[i] "\")";
 146
 147         print "  " enum "," s "/* -" opts[i] " */"
 148 }
 149
 150 print "  N_OPTS"
 151 print "};"
 152 print ""
 153 print "#endif /* OPTIONS_H */"
 154 }