gcc/gcc/optc-gen.awk
2021-01-04 10:26:59 +01:00

620 lines
21 KiB
Awk

# Copyright (C) 2003-2021 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 {
# Combine the flags of identical switches. Switches
# appear many times if they are handled by many front
# ends, for example.
for (i = 0; i < n_opts; i++) {
merged_flags[i] = flags[i]
}
for (i = 0; i < n_opts; i++) {
while(i + 1 != n_opts && opts[i] == opts[i + 1] ) {
merged_flags[i + 1] = merged_flags[i] " " merged_flags[i + 1];
i++;
}
}
# Record EnabledBy and LangEnabledBy uses.
n_enabledby = 0;
for (i = 0; i < n_langs; i++) {
n_enabledby_lang[i] = 0;
}
for (i = 0; i < n_opts; i++) {
enabledby_arg = opt_args("EnabledBy", flags[i]);
if (enabledby_arg != "") {
logical_and = index(enabledby_arg, " && ");
if (logical_and != 0) {
# EnabledBy(arg1 && arg2)
split_sep = " && ";
} else {
# EnabledBy(arg) or EnabledBy(arg1 || arg2 || arg3)
split_sep = " \\|\\| ";
}
n_enabledby_names = split(enabledby_arg, enabledby_names, split_sep);
if (logical_and != 0 && n_enabledby_names > 2) {
print "#error " opts[i] " EnabledBy(Wfoo && Wbar && Wbaz) currently not supported"
}
for (j = 1; j <= n_enabledby_names; j++) {
enabledby_name = enabledby_names[j];
enabledby_index = opt_numbers[enabledby_name];
if (enabledby_index == "") {
print "#error " opts[i] " Enabledby(" enabledby_name "), unknown option '" enabledby_name "'"
} else if (!flag_set_p("Common", merged_flags[enabledby_index])) {
print "#error " opts[i] " Enabledby(" enabledby_name "), '" \
enabledby_name "' must have flag 'Common'" \
" to use Enabledby(), otherwise use LangEnabledBy()"
} else {
condition = "";
if (logical_and != 0) {
opt_var_name_1 = search_var_name(enabledby_names[1], opt_numbers, opts, flags, n_opts);
opt_var_name_2 = search_var_name(enabledby_names[2], opt_numbers, opts, flags, n_opts);
if (opt_var_name_1 == "") {
print "#error " enabledby_names[1] " does not have a Var() flag"
}
if (opt_var_name_2 == "") {
print "#error " enabledby_names[2] " does not have a Var() flag"
}
condition = "opts->x_" opt_var_name_1 " && opts->x_" opt_var_name_2;
}
if (enables[enabledby_name] == "") {
enabledby[n_enabledby] = enabledby_name;
n_enabledby++;
}
enables[enabledby_name] = enables[enabledby_name] opts[i] ";";
enablesif[enabledby_name] = enablesif[enabledby_name] condition ";";
}
}
}
enabledby_arg = opt_args("LangEnabledBy", flags[i]);
if (enabledby_arg != "") {
enabledby_langs = nth_arg(0, enabledby_arg);
enabledby_name = nth_arg(1, enabledby_arg);
enabledby_posarg = nth_arg(2, enabledby_arg);
enabledby_negarg = nth_arg(3, enabledby_arg);
lang_enabled_by(enabledby_langs, enabledby_name, enabledby_posarg, enabledby_negarg);
}
if (flag_set_p("Param", flags[i]) && !(opts[i] ~ "^-param="))
print "#error Parameter option name '" opts[i] "' must start with '-param='"
}
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_" lang_sanitized_name(langs[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 "#if (1U << " n_langs ") > CL_MIN_OPTION_CLASS"
print " #error the number of languages exceeds the implementation limit"
print "#endif"
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 "#error Multiple different help strings for " \
opts[i] ":\n\t" help[i] "\n\t" help[i + 1]
i++;
back_chain[i] = "N_OPTS";
indices[opts[i]] = j;
}
j++;
}
optindex = 0
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 = "NULL"
else
hlp = quote help[i] quote;
missing_arg_error = opt_args("MissingArgError", flags[i])
if (missing_arg_error == "")
missing_arg_error = "NULL"
else
missing_arg_error = quote missing_arg_error quote
warn_message = opt_args("Warn", flags[i])
if (warn_message == "")
warn_message = "NULL"
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"
if (warn_message != "NULL")
print "#error Ignored option with Warn"
if (var_name(flags[i]) != "")
print "#error Ignored option with Var"
}
else if (flag_set_p("Deprecated", flags[i]))
print "#error Deprecated was replaced with WarnRemoved"
else if (flag_set_p("WarnRemoved", flags[i])) {
alias_data = "NULL, NULL, OPT_SPECIAL_warn_removed"
if (warn_message != "NULL")
print "#error WarnRemoved option with Warn"
}
else
alias_data = "NULL, NULL, N_OPTS"
if (flag_set_p("Enum.*", flags[i])) {
if (!flag_set_p("RejectNegative", flags[i]) \
&& opts[i] ~ "^[Wfgm]")
print "#error Enum allowing negative form"
}
} 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]) != "(unsigned short) -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] ~ "^[Wfgm]")
idx = indices[opts[i]];
else
idx = -1;
}
}
# Split the printf after %u to work around an ia64-hp-hpux11.23
# awk bug.
printf(" /* [%i] = */ {\n", optindex)
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(" /* .neg_idx = */ %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 }%s\n", var_ref(opts[i], flags[i]),
var_set(flags[i]), integer_range_info(opt_args("IntegerRange", flags[i]),
opt_args("Init", flags[i]), opts[i]), comma)
# Bump up the informational option index.
++optindex
}
print "};"
print "\n\n"
print "bool "
print "common_handle_option_auto (struct gcc_options *opts, "
print " struct gcc_options *opts_set, "
print " const struct cl_decoded_option *decoded, "
print " unsigned int lang_mask, int kind, "
print " location_t loc, "
print " const struct cl_option_handlers *handlers, "
print " diagnostic_context *dc) "
print "{ "
print " size_t scode = decoded->opt_index; "
print " HOST_WIDE_INT value = decoded->value; "
print " enum opt_code code = (enum opt_code) scode; "
print " "
print " gcc_assert (decoded->canonical_option_num_elements <= 2); "
print " "
print " switch (code) "
print " { "
# Handle EnabledBy
for (i = 0; i < n_enabledby; i++) {
enabledby_name = enabledby[i];
print " case " opt_enum(enabledby_name) ":"
n_enables = split(enables[enabledby_name], thisenable, ";");
n_enablesif = split(enablesif[enabledby_name], thisenableif, ";");
if (n_enables != n_enablesif) {
print "#error n_enables != n_enablesif: Something went wrong!"
}
for (j = 1; j < n_enables; j++) {
opt_var_name = var_name(flags[opt_numbers[thisenable[j]]]);
if (opt_var_name != "") {
condition = "!opts_set->x_" opt_var_name
if (thisenableif[j] != "") {
value = "(" thisenableif[j] ")"
} else {
value = "value"
}
print " if (" condition ")"
print " handle_generated_option (opts, opts_set,"
print " " opt_enum(thisenable[j]) ", NULL, " value ","
print " lang_mask, kind, loc, handlers, true, dc);"
} else {
print "#error " thisenable[j] " does not have a Var() flag"
}
}
print " break;\n"
}
print " default: "
print " break; "
print " } "
print " return true; "
print "} "
# Handle LangEnabledBy
for (i = 0; i < n_langs; i++) {
lang_name = lang_sanitized_name(langs[i]);
mark_unused = " ATTRIBUTE_UNUSED";
print "\n\n"
print "bool "
print lang_name "_handle_option_auto (struct gcc_options *opts" mark_unused ", "
print " struct gcc_options *opts_set" mark_unused ", "
print " size_t scode" mark_unused ", const char *arg" mark_unused ", HOST_WIDE_INT value" mark_unused ", "
print " unsigned int lang_mask" mark_unused ", int kind" mark_unused ", "
print " location_t loc" mark_unused ", "
print " const struct cl_option_handlers *handlers" mark_unused ", "
print " diagnostic_context *dc" mark_unused ") "
print "{ "
print " enum opt_code code = (enum opt_code) scode; "
print " "
print " switch (code) "
print " { "
for (k = 0; k < n_enabledby_lang[i]; k++) {
enabledby_name = enabledby[lang_name,k];
print " case " opt_enum(enabledby_name) ":"
n_thisenable = split(enables[lang_name,enabledby_name], thisenable, ";");
for (j = 1; j < n_thisenable; j++) {
n_thisenable_args = split(thisenable[j], thisenable_args, ",");
if (n_thisenable_args == 1) {
thisenable_opt = thisenable[j];
value = "value";
} else {
thisenable_opt = thisenable_args[1];
with_posarg = thisenable_args[2];
with_negarg = thisenable_args[3];
value = "value ? " with_posarg " : " with_negarg;
}
opt_var_name = var_name(flags[opt_numbers[thisenable_opt]]);
if (opt_var_name != "") {
print " if (!opts_set->x_" opt_var_name ")"
print " handle_generated_option (opts, opts_set,"
print " " opt_enum(thisenable_opt) ", NULL, " value ","
print " lang_mask, kind, loc, handlers, true, dc);"
} else {
print "#error " thisenable_opt " does not have a Var() flag"
}
}
print " break;\n"
}
print " default: "
print " break; "
print " } "
print " return true; "
print "} "
}
#Handle CPP()
print "\n"
print "#include " quote "cpplib.h" quote;
print "void"
print "cpp_handle_option_auto (const struct gcc_options * opts, "
print " size_t scode, struct cpp_options * cpp_opts)"
print "{ "
print " enum opt_code code = (enum opt_code) scode; "
print " "
print " switch (code) "
print " { "
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++;
}
cpp_option = nth_arg(0, opt_args("CPP", flags[i]));
if (cpp_option != "") {
opt_var_name = var_name(flags[i]);
init = opt_args("Init", flags[i])
if (opt_var_name != "" && init != "") {
print " case " opt_enum(opts[i]) ":"
print " cpp_opts->" cpp_option " = opts->x_" opt_var_name ";"
print " break;"
} else if (opt_var_name == "" && init == "") {
print "#error CPP() requires setting Init() and Var() for " opts[i]
} else if (opt_var_name != "") {
print "#error CPP() requires setting Init() for " opts[i]
} else {
print "#error CPP() requires setting Var() for " opts[i]
}
}
}
print " default: "
print " break; "
print " } "
print "}\n"
print "void"
print "init_global_opts_from_cpp(struct gcc_options * opts, "
print " const struct cpp_options * cpp_opts)"
print "{ "
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++;
}
cpp_option = nth_arg(0, opt_args("CPP", flags[i]));
opt_var_name = var_name(flags[i]);
if (cpp_option != "" && opt_var_name != "") {
print " opts->x_" opt_var_name " = cpp_opts->" cpp_option ";"
}
}
print "} "
split("", var_seen, ":")
print "\n#if !defined(GENERATOR_FILE) && defined(ENABLE_PLUGIN)"
print "DEBUG_VARIABLE const struct cl_var cl_vars[] =\n{"
for (i = 0; i < n_opts; i++) {
name = var_name(flags[i]);
if (name == "")
continue;
var_seen[name] = 1;
}
for (i = 0; i < n_extra_vars; i++) {
var = extra_vars[i]
sub(" *=.*", "", var)
name = var
sub("^.*[ *]", "", name)
sub("\\[.*\\]$", "", name)
if (name in var_seen)
continue;
print " { " quote name quote ", offsetof (struct gcc_options, x_" name ") },"
var_seen[name] = 1
}
print " { NULL, (unsigned short) -1 }\n};\n#endif"
}