# Copyright (C) 2003-2014 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 # . # Some common subroutines for use by opt[ch]-gen.awk. # Define some helpful character classes, for portability. BEGIN { lower = "abcdefghijklmnopqrstuvwxyz" upper = "ABCDEFGHIJKLMNOPQRSTUVWXYZ" digit = "0123456789" alnum = lower "" upper "" digit } # Return nonzero if FLAGS contains a flag matching REGEX. function flag_set_p(regex, flags) { # Ignore the arguments of flags with arguments. gsub ("\\([^)]+\\)", "", flags); return (" " flags " ") ~ (" " regex " ") } # Return STRING if FLAGS contains a flag matching regexp REGEX, # otherwise return the empty string. function test_flag(regex, flags, string) { if (flag_set_p(regex, flags)) return string return "" } # Return a field initializer, with trailing comma, for a field that is # 1 if FLAGS contains a flag matching REGEX and 0 otherwise. function flag_init(regex, flags) { if (flag_set_p(regex, flags)) return "1 /* " regex " */, " else return "0, " } # If FLAGS contains a "NAME(...argument...)" flag, return the value # of the argument. Return the empty string otherwise. function opt_args(name, flags) { flags = " " flags if (flags !~ " " name "\\(") return "" sub(".* " name "\\(", "", flags) if (flags ~ "^{") { sub ("^{", "", flags) sub("}\\).*", "", flags) } else sub("\\).*", "", flags) return flags } # Return the Nth comma-separated element of S. Return the empty string # if S does not contain N elements. function nth_arg(n, s) { while (n-- > 0) { if (s !~ ",") return "" sub("[^,]*, *", "", s) } sub(",.*", "", s) return s } # Return a bitmask of CL_* values for option flags FLAGS. function switch_flags (flags) { result = "0" for (j = 0; j < n_langs; j++) { regex = langs[j] gsub ( "\\+", "\\+", regex ) result = result test_flag(regex, flags, " | " macros[j]) } result = result \ test_flag("Common", flags, " | CL_COMMON") \ test_flag("Target", flags, " | CL_TARGET") \ test_flag("PchIgnore", flags, " | CL_PCH_IGNORE") \ test_flag("Driver", flags, " | CL_DRIVER") \ test_flag("Joined", flags, " | CL_JOINED") \ test_flag("JoinedOrMissing", flags, " | CL_JOINED") \ test_flag("Separate", flags, " | CL_SEPARATE") \ test_flag("Undocumented", flags, " | CL_UNDOCUMENTED") \ test_flag("NoDWARFRecord", flags, " | CL_NO_DWARF_RECORD") \ test_flag("Warning", flags, " | CL_WARNING") \ test_flag("Optimization", flags, " | CL_OPTIMIZATION") sub( "^0 \\| ", "", result ) return result } # Return bit-field initializers for option flags FLAGS. function switch_bit_fields (flags) { vn = var_name(flags); if (host_wide_int[vn] == "yes") hwi = "Host_Wide_Int" else hwi = "" result = "" sep_args = opt_args("Args", flags) if (sep_args == "") sep_args = 0 else sep_args-- result = result sep_args ", " result = result \ flag_init("SeparateAlias", flags) \ flag_init("NegativeAlias", flags) \ flag_init("NoDriverArg", flags) \ flag_init("RejectDriver", flags) \ flag_init("RejectNegative", flags) \ flag_init("JoinedOrMissing", flags) \ flag_init("UInteger", flags) \ flag_init("Host_Wide_Int", hwi) \ flag_init("ToLower", flags) \ flag_init("Report", flags) sub(", $", "", result) return result } # If FLAGS includes a Var flag, return the name of the variable it specifies. # Return the empty string otherwise. function var_name(flags) { return nth_arg(0, opt_args("Var", flags)) } # Return the name of the variable if FLAGS has a HOST_WIDE_INT variable. # Return the empty string otherwise. function host_wide_int_var_name(flags) { split (flags, array, "[ \t]+") if (array[1] == "HOST_WIDE_INT") return array[2] else return "" } # Return true if the option described by FLAGS has a globally-visible state. function global_state_p(flags) { return (var_name(flags) != "" \ || opt_args("Mask", flags) != "" \ || opt_args("InverseMask", flags) != "") } # Return true if the option described by FLAGS must have some state # associated with it. function needs_state_p(flags) { return (flag_set_p("Target", flags) \ && !flag_set_p("Alias.*", flags) \ && !flag_set_p("Ignore", flags)) } # If FLAGS describes an option that needs state without a public # variable name, return the name of that field, minus the initial # "x_", otherwise return "". NAME is the name of the option. function static_var(name, flags) { if (global_state_p(flags) || !needs_state_p(flags)) return "" gsub ("[^" alnum "]", "_", name) return "VAR_" name } # Return the type of variable that should be associated with the given flags. function var_type(flags) { if (flag_set_p("Defer", flags)) return "void *" else if (flag_set_p("Enum.*", flags)) { en = opt_args("Enum", flags); return enum_type[en] " " } else if (!flag_set_p("Joined.*", flags) && !flag_set_p("Separate", flags)) return "int " else if (flag_set_p("UInteger", flags)) return "int " else return "const char *" } # Return the type of variable that should be associated with the given flags # for use within a structure. Simple variables are changed to signed char # type instead of int to save space. function var_type_struct(flags) { if (flag_set_p("UInteger", flags)) return "int " else if (flag_set_p("Enum.*", flags)) { en = opt_args("Enum", flags); return enum_type[en] " " } else if (!flag_set_p("Joined.*", flags) && !flag_set_p("Separate", flags)) { if (flag_set_p(".*Mask.*", flags)) { if (host_wide_int[var_name(flags)] == "yes") return "HOST_WIDE_INT " else return "int " } else return "signed char " } else return "const char *" } # Given that an option has flags FLAGS, return an initializer for the # "var_enum", "var_type" and "var_value" fields of its cl_options[] entry. function var_set(flags) { if (flag_set_p("Defer", flags)) return "0, CLVC_DEFER, 0" s = nth_arg(1, opt_args("Var", flags)) if (s != "") return "0, CLVC_EQUAL, " s s = opt_args("Mask", flags); if (s != "") { vn = var_name(flags); if (vn) return "0, CLVC_BIT_SET, OPTION_MASK_" s else return "0, CLVC_BIT_SET, MASK_" s } s = nth_arg(0, opt_args("InverseMask", flags)); if (s != "") { vn = var_name(flags); if (vn) return "0, CLVC_BIT_CLEAR, OPTION_MASK_" s else return "0, CLVC_BIT_CLEAR, MASK_" s } if (flag_set_p("Enum.*", flags)) { en = opt_args("Enum", flags); return enum_index[en] ", CLVC_ENUM, 0" } if (var_type(flags) == "const char *") return "0, CLVC_STRING, 0" return "0, CLVC_BOOLEAN, 0" } # Given that an option called NAME has flags FLAGS, return an initializer # for the "flag_var" field of its cl_options[] entry. function var_ref(name, flags) { name = var_name(flags) static_var(name, flags) if (name != "") return "offsetof (struct gcc_options, x_" name ")" if (opt_args("Mask", flags) != "") return "offsetof (struct gcc_options, x_target_flags)" if (opt_args("InverseMask", flags) != "") return "offsetof (struct gcc_options, x_target_flags)" return "-1" } # Given the option called NAME return a sanitized version of its name. function opt_sanitized_name(name) { gsub ("[^" alnum "]", "_", name) return name } # Given the option called NAME return the appropriate enum for it. function opt_enum(name) { return "OPT_" opt_sanitized_name(name) } # Given the language called NAME return a sanitized version of its name. function lang_sanitized_name(name) { gsub( "[^" alnum "_]", "X", name ) return name } # Search for a valid var_name among all OPTS equal to option NAME. # If not found, return "". function search_var_name(name, opt_numbers, opts, flags, n_opts) { opt_var_name = var_name(flags[opt_numbers[name]]); if (opt_var_name != "") { return opt_var_name; } for (k = 0; k < n_opts; k++) { if (opts[k] == name && var_name(flags[k]) != "") { return var_name(flags[k]); } } return "" } # Handle LangEnabledBy(ENABLED_BY_LANGS, ENABLEDBY_NAME, ENABLEDBY_POSARG, # ENABLEDBY_NEGARG). This function does not return anything. function lang_enabled_by(enabledby_langs, enabledby_name, enabledby_posarg, enabledby_negarg) { n_enabledby_arg_langs = split(enabledby_langs, enabledby_arg_langs, " "); enabledby_index = opt_numbers[enabledby_name]; if (enabledby_index == "") { print "#error LangEnabledby: " enabledby_name } else { if (enabledby_posarg != "" && enabledby_negarg != "") { with_args = "," enabledby_posarg "," enabledby_negarg } else if (enabledby_posarg == "" && enabledby_negarg == "") { with_args = "" } else { print "#error LangEnabledBy("enabledby_langs","enabledby_name", " \ enabledby_posarg", " enabledby_negargs \ ") with three arguments, it should have either 2 or 4" } for (j = 1; j <= n_enabledby_arg_langs; j++) { lang_name = lang_sanitized_name(enabledby_arg_langs[j]); lang_index = lang_numbers[enabledby_arg_langs[j]]; if (enables[lang_name,enabledby_name] == "") { enabledby[lang_name,n_enabledby_lang[lang_index]] = enabledby_name; n_enabledby_lang[lang_index]++; } enables[lang_name,enabledby_name] = enables[lang_name,enabledby_name] opts[i] with_args ";"; } } }