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[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.2.2/] [gcc/] [opth-gen.awk] - Rev 154
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# Copyright (C) 2003,2004,2005,2006,2007 Free Software Foundation, Inc. # Contributed by Kelley Cook, June 2004. # Original code from Neil Booth, May 2003. # # This program is free software; you can redistribute it and/or modify it # under the terms of the GNU General Public License as published by the # Free Software Foundation; either version 3, or (at your option) any # later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program; see the file COPYING3. If not see # <http://www.gnu.org/licenses/>. # This Awk script reads in the option records generated from # opt-gather.awk, combines the flags of duplicate options and generates a # C header file. # # This program uses functions from opt-functions.awk # Usage: awk -f opt-functions.awk -f opth-gen.awk < inputfile > options.h BEGIN { n_opts = 0 n_langs = 0 n_extra_masks = 0 quote = "\042" comma = "," FS=SUBSEP } # Collect the text and flags of each option into an array { if ($1 == "Language") { langs[n_langs] = $2 n_langs++; } else { name = opt_args("Mask", $1) if (name == "") { opts[n_opts] = $1 flags[n_opts] = $2 help[n_opts] = $3 n_opts++; } else { extra_masks[n_extra_masks++] = name } } } # Dump out an enumeration into a .h file. # Combine the flags of duplicate options. END { print "/* This file is auto-generated by opts.sh. */" print "" print "#ifndef OPTIONS_H" print "#define OPTIONS_H" print "" print "extern int target_flags;" print "" for (i = 0; i < n_opts; i++) { name = var_name(flags[i]); if (name == "") continue; print "extern " var_type(flags[i]) name ";" } print "" for (i = 0; i < n_opts; i++) { name = opt_args("Mask", flags[i]) vname = var_name(flags[i]) mask = "MASK_" if (vname != "") { mask = "OPTION_MASK_" } if (name != "" && !flag_set_p("MaskExists", flags[i])) print "#define " mask name " (1 << " masknum[vname]++ ")" } for (i = 0; i < n_extra_masks; i++) { print "#define MASK_" extra_masks[i] " (1 << " masknum[""]++ ")" } for (var in masknum) { if (masknum[var] > 31) { if (var == "") print "#error too many target masks" else print "#error too many masks for " var } } print "" for (i = 0; i < n_opts; i++) { name = opt_args("Mask", flags[i]) vname = var_name(flags[i]) macro = "OPTION_" mask = "OPTION_MASK_" if (vname == "") { vname = "target_flags" macro = "TARGET_" mask = "MASK_" } if (name != "" && !flag_set_p("MaskExists", flags[i])) print "#define " macro name \ " ((" vname " & " mask name ") != 0)" } for (i = 0; i < n_extra_masks; i++) { print "#define TARGET_" extra_masks[i] \ " ((target_flags & MASK_" extra_masks[i] ") != 0)" } print "" for (i = 0; i < n_opts; i++) { opt = opt_args("InverseMask", flags[i]) if (opt ~ ",") { vname = var_name(flags[i]) macro = "OPTION_" mask = "OPTION_MASK_" if (vname == "") { vname = "target_flags" macro = "TARGET_" mask = "MASK_" } print "#define " macro nth_arg(1, opt) \ " ((" vname " & " mask nth_arg(0, opt) ") == 0)" } } print "" for (i = 0; i < n_langs; i++) { macros[i] = "CL_" langs[i] gsub( "[^A-Za-z0-9_]", "X", macros[i] ) s = substr(" ", length (macros[i])) print "#define " macros[i] s " (1 << " i ")" } print "" print "enum opt_code" print "{" for (i = 0; i < n_opts; i++) back_chain[i] = "N_OPTS"; for (i = 0; i < n_opts; i++) { # Combine the flags of identical switches. Switches # appear many times if they are handled by many front # ends, for example. while( i + 1 != n_opts && opts[i] == opts[i + 1] ) { flags[i + 1] = flags[i] " " flags[i + 1]; i++; } len = length (opts[i]); enum = "OPT_" opts[i] if (opts[i] == "finline-limit=") enum = enum "eq" gsub ("[^A-Za-z0-9]", "_", enum) # If this switch takes joined arguments, back-chain all # subsequent switches to it for which it is a prefix. If # a later switch S is a longer prefix of a switch T, T # will be back-chained to S in a later iteration of this # for() loop, which is what we want. if (flag_set_p("Joined.*", flags[i])) { for (j = i + 1; j < n_opts; j++) { if (substr (opts[j], 1, len) != opts[i]) break; back_chain[j] = enum; } } s = substr(" ", length (opts[i])) if (i + 1 == n_opts) comma = "" if (help[i] == "") hlp = "0" else hlp = "N_(\"" help[i] "\")"; print " " enum "," s "/* -" opts[i] " */" } print " N_OPTS" print "};" print "" print "#endif /* OPTIONS_H */" }