optc-gen.awk

#  Copyright (C) 2003, 2004, 2007, 2008, 2009, 2010, 2011
#  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 file.
#

# This program uses functions from opt-functions.awk and code from
# opt-read.awk.
#
# Usage: awk -f opt-functions.awk -f opt-read.awk -f optc-gen.awk \
#            [-v header_name=header.h] < inputfile > options.c

# Dump that array of options into a C file.
END {
print "/* This file is auto-generated by optc-gen.awk.  */"
print ""
n_headers = split(header_name, headers, " ")
for (i = 1; i <= n_headers; i++)
	print "#include " quote headers[i] quote
print "#include " quote "opts.h" quote
print "#include " quote "intl.h" quote
print "#include " quote "insn-attr-common.h" quote
print ""

if (n_extra_c_includes > 0) {
	for (i = 0; i < n_extra_c_includes; i++) {
		print "#include " quote extra_c_includes[i] quote
	}
	print ""
}

for (i = 0; i < n_enums; i++) {
	name = enum_names[i]
	type = enum_type[name]
	print "static const struct cl_enum_arg cl_enum_" name \
	    "_data[] = "
	print "{"
	print enum_data[name] "  { NULL, 0, 0 }"
	print "};"
	print ""
	print "static void"
	print "cl_enum_" name "_set (void *var, int value)"
	print "{"
	print "  *((" type " *) var) = (" type ") value;"
	print "}"
	print ""
	print "static int"
	print "cl_enum_" name "_get (const void *var)"
	print "{"
	print "  return (int) *((const " type " *) var);"
	print "}"
	print ""
}

print "const struct cl_enum cl_enums[] ="
print "{"
for (i = 0; i < n_enums; i++) {
	name = enum_names[i]
	ehelp = enum_help[name]
	if (ehelp == "")
		ehelp = "NULL"
	else
		ehelp = quote ehelp quote
	unknown_error = enum_unknown_error[name]
	if (unknown_error == "")
		unknown_error = "NULL"
	else
		unknown_error = quote unknown_error quote
	print "  {"
	print "    " ehelp ","
	print "    " unknown_error ","
	print "    cl_enum_" name "_data,"
	print "    sizeof (" enum_type[name] "),"
	print "    cl_enum_" name "_set,"
	print "    cl_enum_" name "_get"
	print "  },"
}
print "};"
print "const unsigned int cl_enums_count = " n_enums ";"
print ""

print "const struct gcc_options global_options_init =\n{"
for (i = 0; i < n_extra_vars; i++) {
	var = extra_vars[i]
	init = extra_vars[i]
	if (var ~ "=" ) {
		sub(".*= *", "", init)
	} else {
		init = "0"
	}
	sub(" *=.*", "", var)
	name = var
	sub("^.*[ *]", "", name)
	sub("\\[.*\\]$", "", name)
	var_seen[name] = 1
	print "  " init ", /* " name " */"
}
for (i = 0; i < n_opts; i++) {
	name = var_name(flags[i]);
	if (name == "")
		continue;

	init = opt_args("Init", flags[i])
	if (init != "") {
		if (name in var_init && var_init[name] != init)
			print "#error multiple initializers for " name
		var_init[name] = init
	}
}
for (i = 0; i < n_opts; i++) {
	name = var_name(flags[i]);
	if (name == "")
		continue;

	if (name in var_seen)
		continue;

	if (name in var_init)
		init = var_init[name]
	else
		init = "0"

	print "  " init ", /* " name " */"

	var_seen[name] = 1;
}
for (i = 0; i < n_opts; i++) {
	name = static_var(opts[i], flags[i]);
	if (name != "") {
		print "  0, /* " name " (private state) */"
		print "#undef x_" name
	}
}
for (i = 0; i < n_opts; i++) {
	if (flag_set_p("SetByCombined", flags[i]))
		print "  false, /* frontend_set_" var_name(flags[i]) " */"
}
print "};"
print ""
print "struct gcc_options global_options;"
print "struct gcc_options global_options_set;"
print ""

print "const char * const lang_names[] =\n{"
for (i = 0; i < n_langs; i++) {
	macros[i] = "CL_" langs[i]
	gsub( "[^" alnum "_]", "X", macros[i] )
	s = substr("         ", length (macros[i]))
	print "  " quote langs[i] quote ","
    }

print "  0\n};\n"
print "const unsigned int cl_options_count = N_OPTS;\n"
print "const unsigned int cl_lang_count = " n_langs ";\n"

print "const struct cl_option cl_options[] =\n{"

j = 0
for (i = 0; i < n_opts; i++) {
	back_chain[i] = "N_OPTS";
	indices[opts[i]] = j;
	# 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];
		if (help[i + 1] == "")
			help[i + 1] = help[i]
		else if (help[i] != "" && help[i + 1] != help[i])
			print "warning: multiple different help strings for " \
				opts[i] ":\n\t" help[i] "\n\t" help[i + 1] \
				| "cat 1>&2"
		i++;
		back_chain[i] = "N_OPTS";
		indices[opts[i]] = j;
	}
	j++;
}

for (i = 0; i < n_opts; i++) {
	# With identical flags, pick only the last one.  The
	# earlier loop ensured that it has all flags merged,
	# and a nonempty help text if one of the texts was nonempty.
	while( i + 1 != n_opts && opts[i] == opts[i + 1] ) {
		i++;
	}

	len = length (opts[i]);
	enum = opt_enum(opts[i])

	# 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 = quote help[i] quote;

	missing_arg_error = opt_args("MissingArgError", flags[i])
	if (missing_arg_error == "")
		missing_arg_error = "0"
	else
		missing_arg_error = quote missing_arg_error quote


	warn_message = opt_args("Warn", flags[i])
	if (warn_message == "")
		warn_message = "0"
	else
		warn_message = quote warn_message quote

	alias_arg = opt_args("Alias", flags[i])
	if (alias_arg == "") {
		if (flag_set_p("Ignore", flags[i]))
			alias_data = "NULL, NULL, OPT_SPECIAL_ignore"
		else
			alias_data = "NULL, NULL, N_OPTS"
	} else {
		alias_opt = nth_arg(0, alias_arg)
		alias_posarg = nth_arg(1, alias_arg)
		alias_negarg = nth_arg(2, alias_arg)

		if (var_ref(opts[i], flags[i]) != "-1")
			print "#error Alias setting variable"

		if (alias_posarg != "" && alias_negarg == "") {
			if (!flag_set_p("RejectNegative", flags[i]) \
			    && opts[i] ~ "^[Wfm]")
				print "#error Alias with single argument " \
					"allowing negative form"
		}
		if (alias_posarg != "" \
		    && flag_set_p("NegativeAlias", flags[i])) {
			print "#error Alias with multiple arguments " \
				"used with NegativeAlias"
		}

		alias_opt = opt_enum(alias_opt)
		if (alias_posarg == "")
			alias_posarg = "NULL"
		else
			alias_posarg = quote alias_posarg quote
		if (alias_negarg == "")
			alias_negarg = "NULL"
		else
			alias_negarg = quote alias_negarg quote
		alias_data = alias_posarg ", " alias_negarg ", " alias_opt
	}

	neg = opt_args("Negative", flags[i]);
	if (neg != "")
		idx = indices[neg]
	else {
		if (flag_set_p("RejectNegative", flags[i]))
			idx = -1;
		else {
			if (opts[i] ~ "^[Wfm]")
				idx = indices[opts[i]];
			else
				idx = -1;
		}
	}
	# Split the printf after %u to work around an ia64-hp-hpux11.23
	# awk bug.
	printf("  { %c-%s%c,\n    %s,\n    %s,\n    %s,\n    %s, %s, %u,",
	       quote, opts[i], quote, hlp, missing_arg_error, warn_message,
	       alias_data, back_chain[i], len)
	printf(" %d,\n", idx)
	condition = opt_args("Condition", flags[i])
	cl_flags = switch_flags(flags[i])
	cl_bit_fields = switch_bit_fields(flags[i])
	cl_zero_bit_fields = switch_bit_fields("")
	if (condition != "")
		printf("#if %s\n" \
		       "    %s,\n" \
		       "    0, %s,\n" \
		       "#else\n" \
		       "    0,\n" \
		       "    1 /* Disabled.  */, %s,\n" \
		       "#endif\n",
		       condition, cl_flags, cl_bit_fields, cl_zero_bit_fields)
	else
		printf("    %s,\n" \
		       "    0, %s,\n",
		       cl_flags, cl_bit_fields)
	printf("    %s, %s }%s\n", var_ref(opts[i], flags[i]),
	       var_set(flags[i]), comma)
}

print "};"

}