1471 lines
37 KiB
C
1471 lines
37 KiB
C
/* Command line option handling.
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Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007
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Free Software Foundation, Inc.
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Contributed by Neil Booth.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 2, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING. If not, write to the Free
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Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301, USA. */
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/* $FreeBSD$ */
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#include "config.h"
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#include "system.h"
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#include "intl.h"
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#include "coretypes.h"
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#include "tm.h"
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#include "tree.h"
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#include "rtl.h"
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#include "ggc.h"
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#include "output.h"
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#include "langhooks.h"
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#include "opts.h"
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#include "options.h"
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#include "flags.h"
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#include "toplev.h"
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#include "params.h"
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#include "diagnostic.h"
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#include "tm_p.h" /* For OPTIMIZATION_OPTIONS. */
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#include "insn-attr.h" /* For INSN_SCHEDULING. */
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#include "target.h"
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#include "tree-pass.h"
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/* Value of the -G xx switch, and whether it was passed or not. */
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unsigned HOST_WIDE_INT g_switch_value;
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bool g_switch_set;
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/* True if we should exit after parsing options. */
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bool exit_after_options;
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/* Print various extra warnings. -W/-Wextra. */
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bool extra_warnings;
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/* True to warn about any objects definitions whose size is larger
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than N bytes. Also want about function definitions whose returned
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values are larger than N bytes, where N is `larger_than_size'. */
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bool warn_larger_than;
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HOST_WIDE_INT larger_than_size;
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/* Nonzero means warn about constructs which might not be
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strict-aliasing safe. */
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int warn_strict_aliasing;
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/* Nonzero means warn about optimizations which rely on undefined
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signed overflow. */
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int warn_strict_overflow;
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/* Hack for cooperation between set_Wunused and set_Wextra. */
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static bool maybe_warn_unused_parameter;
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/* Type(s) of debugging information we are producing (if any). See
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flags.h for the definitions of the different possible types of
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debugging information. */
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enum debug_info_type write_symbols = NO_DEBUG;
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/* Level of debugging information we are producing. See flags.h for
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the definitions of the different possible levels. */
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enum debug_info_level debug_info_level = DINFO_LEVEL_NONE;
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/* Nonzero means use GNU-only extensions in the generated symbolic
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debugging information. Currently, this only has an effect when
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write_symbols is set to DBX_DEBUG, XCOFF_DEBUG, or DWARF_DEBUG. */
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bool use_gnu_debug_info_extensions;
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/* The default visibility for all symbols (unless overridden) */
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enum symbol_visibility default_visibility = VISIBILITY_DEFAULT;
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/* Disable unit-at-a-time for frontends that might be still broken in this
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respect. */
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bool no_unit_at_a_time_default;
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/* Global visibility options. */
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struct visibility_flags visibility_options;
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/* Columns of --help display. */
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static unsigned int columns = 80;
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/* What to print when a switch has no documentation. */
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static const char undocumented_msg[] = N_("This switch lacks documentation");
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/* Used for bookkeeping on whether user set these flags so
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-fprofile-use/-fprofile-generate does not use them. */
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static bool profile_arc_flag_set, flag_profile_values_set;
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static bool flag_unroll_loops_set, flag_tracer_set;
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static bool flag_value_profile_transformations_set;
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static bool flag_peel_loops_set, flag_branch_probabilities_set;
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/* Input file names. */
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const char **in_fnames;
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unsigned num_in_fnames;
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static int common_handle_option (size_t scode, const char *arg, int value,
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unsigned int lang_mask);
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static void handle_param (const char *);
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static void set_Wextra (int);
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static unsigned int handle_option (const char **argv, unsigned int lang_mask);
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static char *write_langs (unsigned int lang_mask);
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static void complain_wrong_lang (const char *, const struct cl_option *,
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unsigned int lang_mask);
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static void handle_options (unsigned int, const char **, unsigned int);
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static void wrap_help (const char *help, const char *item, unsigned int);
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static void print_target_help (void);
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static void print_help (void);
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static void print_param_help (void);
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static void print_filtered_help (unsigned int);
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static unsigned int print_switch (const char *text, unsigned int indent);
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static void set_debug_level (enum debug_info_type type, int extended,
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const char *arg);
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/* If ARG is a non-negative integer made up solely of digits, return its
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value, otherwise return -1. */
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static int
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integral_argument (const char *arg)
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{
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const char *p = arg;
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while (*p && ISDIGIT (*p))
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p++;
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if (*p == '\0')
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return atoi (arg);
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return -1;
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}
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/* Return a malloced slash-separated list of languages in MASK. */
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static char *
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write_langs (unsigned int mask)
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{
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unsigned int n = 0, len = 0;
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const char *lang_name;
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char *result;
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for (n = 0; (lang_name = lang_names[n]) != 0; n++)
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if (mask & (1U << n))
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len += strlen (lang_name) + 1;
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result = XNEWVEC (char, len);
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len = 0;
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for (n = 0; (lang_name = lang_names[n]) != 0; n++)
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if (mask & (1U << n))
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{
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if (len)
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result[len++] = '/';
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strcpy (result + len, lang_name);
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len += strlen (lang_name);
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}
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result[len] = 0;
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return result;
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}
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/* Complain that switch OPT_INDEX does not apply to this front end. */
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static void
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complain_wrong_lang (const char *text, const struct cl_option *option,
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unsigned int lang_mask)
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{
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char *ok_langs, *bad_lang;
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ok_langs = write_langs (option->flags);
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bad_lang = write_langs (lang_mask);
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/* Eventually this should become a hard error IMO. */
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warning (0, "command line option \"%s\" is valid for %s but not for %s",
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text, ok_langs, bad_lang);
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free (ok_langs);
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free (bad_lang);
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}
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/* Handle the switch beginning at ARGV for the language indicated by
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LANG_MASK. Returns the number of switches consumed. */
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static unsigned int
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handle_option (const char **argv, unsigned int lang_mask)
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{
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size_t opt_index;
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const char *opt, *arg = 0;
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char *dup = 0;
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int value = 1;
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unsigned int result = 0;
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const struct cl_option *option;
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opt = argv[0];
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opt_index = find_opt (opt + 1, lang_mask | CL_COMMON | CL_TARGET);
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if (opt_index == cl_options_count
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&& (opt[1] == 'W' || opt[1] == 'f' || opt[1] == 'm')
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&& opt[2] == 'n' && opt[3] == 'o' && opt[4] == '-')
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{
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/* Drop the "no-" from negative switches. */
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size_t len = strlen (opt) - 3;
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dup = XNEWVEC (char, len + 1);
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dup[0] = '-';
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dup[1] = opt[1];
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memcpy (dup + 2, opt + 5, len - 2 + 1);
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opt = dup;
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value = 0;
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opt_index = find_opt (opt + 1, lang_mask | CL_COMMON | CL_TARGET);
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}
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if (opt_index == cl_options_count)
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goto done;
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option = &cl_options[opt_index];
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/* Reject negative form of switches that don't take negatives as
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unrecognized. */
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if (!value && (option->flags & CL_REJECT_NEGATIVE))
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goto done;
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/* We've recognized this switch. */
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result = 1;
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/* Check to see if the option is disabled for this configuration. */
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if (option->flags & CL_DISABLED)
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{
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error ("command line option %qs"
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" is not supported by this configuration", opt);
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goto done;
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}
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/* Sort out any argument the switch takes. */
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if (option->flags & CL_JOINED)
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{
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/* Have arg point to the original switch. This is because
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some code, such as disable_builtin_function, expects its
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argument to be persistent until the program exits. */
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arg = argv[0] + cl_options[opt_index].opt_len + 1;
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if (!value)
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arg += strlen ("no-");
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if (*arg == '\0' && !(option->flags & CL_MISSING_OK))
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{
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if (option->flags & CL_SEPARATE)
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{
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arg = argv[1];
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result = 2;
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}
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else
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/* Missing argument. */
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arg = NULL;
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}
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}
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else if (option->flags & CL_SEPARATE)
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{
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arg = argv[1];
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result = 2;
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}
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/* Now we've swallowed any potential argument, complain if this
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is a switch for a different front end. */
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if (!(option->flags & (lang_mask | CL_COMMON | CL_TARGET)))
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{
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complain_wrong_lang (argv[0], option, lang_mask);
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goto done;
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}
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if (arg == NULL && (option->flags & (CL_JOINED | CL_SEPARATE)))
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{
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if (!lang_hooks.missing_argument (opt, opt_index))
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error ("missing argument to \"%s\"", opt);
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goto done;
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}
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/* If the switch takes an integer, convert it. */
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if (arg && (option->flags & CL_UINTEGER))
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{
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value = integral_argument (arg);
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if (value == -1)
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{
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error ("argument to \"%s\" should be a non-negative integer",
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option->opt_text);
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goto done;
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}
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}
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if (option->flag_var)
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switch (option->var_type)
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{
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case CLVC_BOOLEAN:
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*(int *) option->flag_var = value;
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break;
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case CLVC_EQUAL:
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*(int *) option->flag_var = (value
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? option->var_value
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: !option->var_value);
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break;
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case CLVC_BIT_CLEAR:
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case CLVC_BIT_SET:
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if ((value != 0) == (option->var_type == CLVC_BIT_SET))
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*(int *) option->flag_var |= option->var_value;
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else
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*(int *) option->flag_var &= ~option->var_value;
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if (option->flag_var == &target_flags)
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target_flags_explicit |= option->var_value;
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break;
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case CLVC_STRING:
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*(const char **) option->flag_var = arg;
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break;
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}
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if (option->flags & lang_mask)
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if (lang_hooks.handle_option (opt_index, arg, value) == 0)
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result = 0;
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if (result && (option->flags & CL_COMMON))
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if (common_handle_option (opt_index, arg, value, lang_mask) == 0)
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result = 0;
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if (result && (option->flags & CL_TARGET))
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if (!targetm.handle_option (opt_index, arg, value))
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result = 0;
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done:
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if (dup)
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free (dup);
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return result;
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}
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/* Handle FILENAME from the command line. */
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static void
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add_input_filename (const char *filename)
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{
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num_in_fnames++;
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in_fnames = xrealloc (in_fnames, num_in_fnames * sizeof (in_fnames[0]));
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in_fnames[num_in_fnames - 1] = filename;
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}
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/* Decode and handle the vector of command line options. LANG_MASK
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contains has a single bit set representing the current
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language. */
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static void
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handle_options (unsigned int argc, const char **argv, unsigned int lang_mask)
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{
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unsigned int n, i;
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for (i = 1; i < argc; i += n)
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{
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const char *opt = argv[i];
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/* Interpret "-" or a non-switch as a file name. */
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if (opt[0] != '-' || opt[1] == '\0')
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{
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if (main_input_filename == NULL)
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main_input_filename = opt;
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add_input_filename (opt);
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n = 1;
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continue;
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}
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n = handle_option (argv + i, lang_mask);
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if (!n)
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{
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n = 1;
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error ("unrecognized command line option \"%s\"", opt);
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}
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}
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}
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/* Parse command line options and set default flag values. Do minimal
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options processing. */
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void
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decode_options (unsigned int argc, const char **argv)
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{
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unsigned int i, lang_mask;
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/* Perform language-specific options initialization. */
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lang_mask = lang_hooks.init_options (argc, argv);
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lang_hooks.initialize_diagnostics (global_dc);
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/* Scan to see what optimization level has been specified. That will
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determine the default value of many flags. */
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for (i = 1; i < argc; i++)
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{
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if (!strcmp (argv[i], "-O"))
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{
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optimize = 1;
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optimize_size = 0;
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}
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else if (argv[i][0] == '-' && argv[i][1] == 'O')
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{
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/* Handle -Os, -O2, -O3, -O69, ... */
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const char *p = &argv[i][2];
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if ((p[0] == 's') && (p[1] == 0))
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{
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optimize_size = 1;
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/* Optimizing for size forces optimize to be 2. */
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optimize = 2;
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}
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else
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{
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const int optimize_val = read_integral_parameter (p, p - 2, -1);
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if (optimize_val != -1)
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{
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optimize = optimize_val;
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optimize_size = 0;
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}
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}
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}
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}
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if (!optimize)
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{
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flag_merge_constants = 0;
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}
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if (optimize >= 1)
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{
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flag_defer_pop = 1;
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#ifdef DELAY_SLOTS
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flag_delayed_branch = 1;
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#endif
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#ifdef CAN_DEBUG_WITHOUT_FP
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flag_omit_frame_pointer = 1;
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#endif
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flag_guess_branch_prob = 1;
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flag_cprop_registers = 1;
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flag_if_conversion = 1;
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flag_if_conversion2 = 1;
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flag_ipa_pure_const = 1;
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flag_ipa_reference = 1;
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flag_tree_ccp = 1;
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flag_tree_dce = 1;
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flag_tree_dom = 1;
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flag_tree_dse = 1;
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flag_tree_ter = 1;
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flag_tree_live_range_split = 1;
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flag_tree_sra = 1;
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flag_tree_copyrename = 1;
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flag_tree_fre = 1;
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flag_tree_copy_prop = 1;
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flag_tree_sink = 1;
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flag_tree_salias = 1;
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if (!no_unit_at_a_time_default)
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flag_unit_at_a_time = 1;
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if (!optimize_size)
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{
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/* Loop header copying usually increases size of the code. This used
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not to be true, since quite often it is possible to verify that
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the condition is satisfied in the first iteration and therefore
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to eliminate it. Jump threading handles these cases now. */
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flag_tree_ch = 1;
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}
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}
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if (optimize >= 2)
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{
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flag_thread_jumps = 1;
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flag_crossjumping = 1;
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flag_optimize_sibling_calls = 1;
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flag_cse_follow_jumps = 1;
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flag_cse_skip_blocks = 1;
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flag_gcse = 1;
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flag_expensive_optimizations = 1;
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flag_ipa_type_escape = 1;
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flag_rerun_cse_after_loop = 1;
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flag_caller_saves = 1;
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flag_peephole2 = 1;
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#ifdef INSN_SCHEDULING
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flag_schedule_insns = 1;
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flag_schedule_insns_after_reload = 1;
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#endif
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flag_regmove = 1;
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flag_strict_aliasing = 1;
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flag_strict_overflow = 1;
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flag_delete_null_pointer_checks = 1;
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flag_reorder_blocks = 1;
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flag_reorder_functions = 1;
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flag_tree_store_ccp = 1;
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flag_tree_store_copy_prop = 1;
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/* XXX: some issues with ports have been traced to -ftree-vrp.
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So remove it from -O2 and above. Note that jdk1{5,6} are affected
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and they build with w/-O3 - so we cannot just move it to -O3. */
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// flag_tree_vrp = 1;
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if (!optimize_size)
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{
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/* PRE tends to generate bigger code. */
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flag_tree_pre = 1;
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}
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}
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if (optimize >= 3)
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{
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flag_inline_functions = 1;
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flag_unswitch_loops = 1;
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flag_gcse_after_reload = 1;
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}
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if (optimize_size)
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{
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align_loops = 1;
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align_jumps = 1;
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align_labels = 1;
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align_functions = 1;
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/* Don't reorder blocks when optimizing for size because extra
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jump insns may be created; also barrier may create extra padding.
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More correctly we should have a block reordering mode that tried
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to minimize the combined size of all the jumps. This would more
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or less automatically remove extra jumps, but would also try to
|
|
use more short jumps instead of long jumps. */
|
|
flag_reorder_blocks = 0;
|
|
flag_reorder_blocks_and_partition = 0;
|
|
}
|
|
|
|
if (optimize_size)
|
|
{
|
|
/* Inlining of very small functions usually reduces total size. */
|
|
set_param_value ("max-inline-insns-single", 5);
|
|
set_param_value ("max-inline-insns-auto", 5);
|
|
flag_inline_functions = 1;
|
|
|
|
/* We want to crossjump as much as possible. */
|
|
set_param_value ("min-crossjump-insns", 1);
|
|
}
|
|
|
|
/* Initialize whether `char' is signed. */
|
|
flag_signed_char = DEFAULT_SIGNED_CHAR;
|
|
/* Set this to a special "uninitialized" value. The actual default is set
|
|
after target options have been processed. */
|
|
flag_short_enums = 2;
|
|
|
|
/* Initialize target_flags before OPTIMIZATION_OPTIONS so the latter can
|
|
modify it. */
|
|
target_flags = targetm.default_target_flags;
|
|
|
|
/* Some tagets have ABI-specified unwind tables. */
|
|
flag_unwind_tables = targetm.unwind_tables_default;
|
|
|
|
#ifdef OPTIMIZATION_OPTIONS
|
|
/* Allow default optimizations to be specified on a per-machine basis. */
|
|
OPTIMIZATION_OPTIONS (optimize, optimize_size);
|
|
#endif
|
|
|
|
handle_options (argc, argv, lang_mask);
|
|
|
|
if (flag_pie)
|
|
flag_pic = flag_pie;
|
|
if (flag_pic && !flag_pie)
|
|
flag_shlib = 1;
|
|
|
|
if (flag_no_inline == 2)
|
|
flag_no_inline = 0;
|
|
else
|
|
flag_really_no_inline = flag_no_inline;
|
|
|
|
/* Set flag_no_inline before the post_options () hook. The C front
|
|
ends use it to determine tree inlining defaults. FIXME: such
|
|
code should be lang-independent when all front ends use tree
|
|
inlining, in which case it, and this condition, should be moved
|
|
to the top of process_options() instead. */
|
|
if (optimize == 0)
|
|
{
|
|
/* Inlining does not work if not optimizing,
|
|
so force it not to be done. */
|
|
flag_no_inline = 1;
|
|
warn_inline = 0;
|
|
|
|
/* The c_decode_option function and decode_option hook set
|
|
this to `2' if -Wall is used, so we can avoid giving out
|
|
lots of errors for people who don't realize what -Wall does. */
|
|
if (warn_uninitialized == 1)
|
|
warning (OPT_Wuninitialized,
|
|
"-Wuninitialized is not supported without -O");
|
|
}
|
|
|
|
if (flag_really_no_inline == 2)
|
|
flag_really_no_inline = flag_no_inline;
|
|
|
|
/* The optimization to partition hot and cold basic blocks into separate
|
|
sections of the .o and executable files does not work (currently)
|
|
with exception handling. This is because there is no support for
|
|
generating unwind info. If flag_exceptions is turned on we need to
|
|
turn off the partitioning optimization. */
|
|
|
|
if (flag_exceptions && flag_reorder_blocks_and_partition)
|
|
{
|
|
inform
|
|
("-freorder-blocks-and-partition does not work with exceptions");
|
|
flag_reorder_blocks_and_partition = 0;
|
|
flag_reorder_blocks = 1;
|
|
}
|
|
|
|
/* If user requested unwind info, then turn off the partitioning
|
|
optimization. */
|
|
|
|
if (flag_unwind_tables && ! targetm.unwind_tables_default
|
|
&& flag_reorder_blocks_and_partition)
|
|
{
|
|
inform ("-freorder-blocks-and-partition does not support unwind info");
|
|
flag_reorder_blocks_and_partition = 0;
|
|
flag_reorder_blocks = 1;
|
|
}
|
|
|
|
/* If the target requested unwind info, then turn off the partitioning
|
|
optimization with a different message. Likewise, if the target does not
|
|
support named sections. */
|
|
|
|
if (flag_reorder_blocks_and_partition
|
|
&& (!targetm.have_named_sections
|
|
|| (flag_unwind_tables && targetm.unwind_tables_default)))
|
|
{
|
|
inform
|
|
("-freorder-blocks-and-partition does not work on this architecture");
|
|
flag_reorder_blocks_and_partition = 0;
|
|
flag_reorder_blocks = 1;
|
|
}
|
|
}
|
|
|
|
/* Handle target- and language-independent options. Return zero to
|
|
generate an "unknown option" message. Only options that need
|
|
extra handling need to be listed here; if you simply want
|
|
VALUE assigned to a variable, it happens automatically. */
|
|
|
|
static int
|
|
common_handle_option (size_t scode, const char *arg, int value,
|
|
unsigned int lang_mask)
|
|
{
|
|
enum opt_code code = (enum opt_code) scode;
|
|
|
|
switch (code)
|
|
{
|
|
case OPT__help:
|
|
print_help ();
|
|
exit_after_options = true;
|
|
break;
|
|
|
|
case OPT__param:
|
|
handle_param (arg);
|
|
break;
|
|
|
|
case OPT__target_help:
|
|
print_target_help ();
|
|
exit_after_options = true;
|
|
break;
|
|
|
|
case OPT__version:
|
|
print_version (stderr, "");
|
|
exit_after_options = true;
|
|
break;
|
|
|
|
case OPT_G:
|
|
g_switch_value = value;
|
|
g_switch_set = true;
|
|
break;
|
|
|
|
case OPT_O:
|
|
case OPT_Os:
|
|
/* Currently handled in a prescan. */
|
|
break;
|
|
|
|
case OPT_W:
|
|
/* For backward compatibility, -W is the same as -Wextra. */
|
|
set_Wextra (value);
|
|
break;
|
|
|
|
case OPT_Werror_:
|
|
{
|
|
char *new_option;
|
|
int option_index;
|
|
new_option = XNEWVEC (char, strlen (arg) + 2);
|
|
new_option[0] = 'W';
|
|
strcpy (new_option+1, arg);
|
|
option_index = find_opt (new_option, lang_mask);
|
|
if (option_index == N_OPTS)
|
|
{
|
|
error ("-Werror=%s: No option -%s", arg, new_option);
|
|
}
|
|
else
|
|
{
|
|
int kind = value ? DK_ERROR : DK_WARNING;
|
|
diagnostic_classify_diagnostic (global_dc, option_index, kind);
|
|
|
|
/* -Werror=foo implies -Wfoo. */
|
|
if (cl_options[option_index].var_type == CLVC_BOOLEAN
|
|
&& cl_options[option_index].flag_var
|
|
&& kind == DK_ERROR)
|
|
*(int *) cl_options[option_index].flag_var = 1;
|
|
free (new_option);
|
|
}
|
|
}
|
|
break;
|
|
|
|
case OPT_Wextra:
|
|
set_Wextra (value);
|
|
break;
|
|
|
|
case OPT_Wlarger_than_:
|
|
larger_than_size = value;
|
|
warn_larger_than = value != -1;
|
|
break;
|
|
|
|
case OPT_Wstrict_aliasing:
|
|
case OPT_Wstrict_aliasing_:
|
|
warn_strict_aliasing = value;
|
|
break;
|
|
|
|
case OPT_Wstrict_overflow:
|
|
warn_strict_overflow = (value
|
|
? (int) WARN_STRICT_OVERFLOW_CONDITIONAL
|
|
: 0);
|
|
break;
|
|
|
|
case OPT_Wstrict_overflow_:
|
|
warn_strict_overflow = value;
|
|
break;
|
|
|
|
case OPT_Wunused:
|
|
set_Wunused (value);
|
|
break;
|
|
|
|
case OPT_aux_info:
|
|
case OPT_aux_info_:
|
|
aux_info_file_name = arg;
|
|
flag_gen_aux_info = 1;
|
|
break;
|
|
|
|
case OPT_auxbase:
|
|
aux_base_name = arg;
|
|
break;
|
|
|
|
case OPT_auxbase_strip:
|
|
{
|
|
char *tmp = xstrdup (arg);
|
|
strip_off_ending (tmp, strlen (tmp));
|
|
if (tmp[0])
|
|
aux_base_name = tmp;
|
|
}
|
|
break;
|
|
|
|
case OPT_d:
|
|
decode_d_option (arg);
|
|
break;
|
|
|
|
case OPT_dumpbase:
|
|
dump_base_name = arg;
|
|
break;
|
|
|
|
case OPT_falign_functions_:
|
|
align_functions = value;
|
|
break;
|
|
|
|
case OPT_falign_jumps_:
|
|
align_jumps = value;
|
|
break;
|
|
|
|
case OPT_falign_labels_:
|
|
align_labels = value;
|
|
break;
|
|
|
|
case OPT_falign_loops_:
|
|
align_loops = value;
|
|
break;
|
|
|
|
case OPT_fbranch_probabilities:
|
|
flag_branch_probabilities_set = true;
|
|
break;
|
|
|
|
case OPT_fcall_used_:
|
|
fix_register (arg, 0, 1);
|
|
break;
|
|
|
|
case OPT_fcall_saved_:
|
|
fix_register (arg, 0, 0);
|
|
break;
|
|
|
|
case OPT_fdiagnostics_show_location_:
|
|
if (!strcmp (arg, "once"))
|
|
diagnostic_prefixing_rule (global_dc) = DIAGNOSTICS_SHOW_PREFIX_ONCE;
|
|
else if (!strcmp (arg, "every-line"))
|
|
diagnostic_prefixing_rule (global_dc)
|
|
= DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE;
|
|
else
|
|
return 0;
|
|
break;
|
|
|
|
case OPT_fdiagnostics_show_option:
|
|
global_dc->show_option_requested = true;
|
|
break;
|
|
|
|
case OPT_fdump_:
|
|
if (!dump_switch_p (arg))
|
|
return 0;
|
|
break;
|
|
|
|
case OPT_ffast_math:
|
|
set_fast_math_flags (value);
|
|
break;
|
|
|
|
case OPT_ffixed_:
|
|
fix_register (arg, 1, 1);
|
|
break;
|
|
|
|
case OPT_finline_limit_:
|
|
case OPT_finline_limit_eq:
|
|
set_param_value ("max-inline-insns-single", value / 2);
|
|
set_param_value ("max-inline-insns-auto", value / 2);
|
|
break;
|
|
|
|
case OPT_fmessage_length_:
|
|
pp_set_line_maximum_length (global_dc->printer, value);
|
|
break;
|
|
|
|
case OPT_fpack_struct_:
|
|
if (value <= 0 || (value & (value - 1)) || value > 16)
|
|
error("structure alignment must be a small power of two, not %d", value);
|
|
else
|
|
{
|
|
initial_max_fld_align = value;
|
|
maximum_field_alignment = value * BITS_PER_UNIT;
|
|
}
|
|
break;
|
|
|
|
case OPT_fpeel_loops:
|
|
flag_peel_loops_set = true;
|
|
break;
|
|
|
|
case OPT_fprofile_arcs:
|
|
profile_arc_flag_set = true;
|
|
break;
|
|
|
|
case OPT_fprofile_use:
|
|
if (!flag_branch_probabilities_set)
|
|
flag_branch_probabilities = value;
|
|
if (!flag_profile_values_set)
|
|
flag_profile_values = value;
|
|
if (!flag_unroll_loops_set)
|
|
flag_unroll_loops = value;
|
|
if (!flag_peel_loops_set)
|
|
flag_peel_loops = value;
|
|
if (!flag_tracer_set)
|
|
flag_tracer = value;
|
|
if (!flag_value_profile_transformations_set)
|
|
flag_value_profile_transformations = value;
|
|
break;
|
|
|
|
case OPT_fprofile_generate:
|
|
if (!profile_arc_flag_set)
|
|
profile_arc_flag = value;
|
|
if (!flag_profile_values_set)
|
|
flag_profile_values = value;
|
|
if (!flag_value_profile_transformations_set)
|
|
flag_value_profile_transformations = value;
|
|
break;
|
|
|
|
case OPT_fprofile_values:
|
|
flag_profile_values_set = true;
|
|
break;
|
|
|
|
case OPT_fvisibility_:
|
|
{
|
|
if (!strcmp(arg, "default"))
|
|
default_visibility = VISIBILITY_DEFAULT;
|
|
else if (!strcmp(arg, "internal"))
|
|
default_visibility = VISIBILITY_INTERNAL;
|
|
else if (!strcmp(arg, "hidden"))
|
|
default_visibility = VISIBILITY_HIDDEN;
|
|
else if (!strcmp(arg, "protected"))
|
|
default_visibility = VISIBILITY_PROTECTED;
|
|
else
|
|
error ("unrecognized visibility value \"%s\"", arg);
|
|
}
|
|
break;
|
|
|
|
case OPT_fvpt:
|
|
flag_value_profile_transformations_set = true;
|
|
break;
|
|
|
|
case OPT_frandom_seed:
|
|
/* The real switch is -fno-random-seed. */
|
|
if (value)
|
|
return 0;
|
|
flag_random_seed = NULL;
|
|
break;
|
|
|
|
case OPT_frandom_seed_:
|
|
flag_random_seed = arg;
|
|
break;
|
|
|
|
case OPT_fsched_verbose_:
|
|
#ifdef INSN_SCHEDULING
|
|
fix_sched_param ("verbose", arg);
|
|
break;
|
|
#else
|
|
return 0;
|
|
#endif
|
|
|
|
case OPT_fsched_stalled_insns_:
|
|
flag_sched_stalled_insns = value;
|
|
if (flag_sched_stalled_insns == 0)
|
|
flag_sched_stalled_insns = -1;
|
|
break;
|
|
|
|
case OPT_fsched_stalled_insns_dep_:
|
|
flag_sched_stalled_insns_dep = value;
|
|
break;
|
|
|
|
case OPT_fstack_limit:
|
|
/* The real switch is -fno-stack-limit. */
|
|
if (value)
|
|
return 0;
|
|
stack_limit_rtx = NULL_RTX;
|
|
break;
|
|
|
|
case OPT_fstack_limit_register_:
|
|
{
|
|
int reg = decode_reg_name (arg);
|
|
if (reg < 0)
|
|
error ("unrecognized register name \"%s\"", arg);
|
|
else
|
|
stack_limit_rtx = gen_rtx_REG (Pmode, reg);
|
|
}
|
|
break;
|
|
|
|
case OPT_fstack_limit_symbol_:
|
|
stack_limit_rtx = gen_rtx_SYMBOL_REF (Pmode, ggc_strdup (arg));
|
|
break;
|
|
|
|
case OPT_ftree_vectorizer_verbose_:
|
|
vect_set_verbosity_level (arg);
|
|
break;
|
|
|
|
case OPT_ftls_model_:
|
|
if (!strcmp (arg, "global-dynamic"))
|
|
flag_tls_default = TLS_MODEL_GLOBAL_DYNAMIC;
|
|
else if (!strcmp (arg, "local-dynamic"))
|
|
flag_tls_default = TLS_MODEL_LOCAL_DYNAMIC;
|
|
else if (!strcmp (arg, "initial-exec"))
|
|
flag_tls_default = TLS_MODEL_INITIAL_EXEC;
|
|
else if (!strcmp (arg, "local-exec"))
|
|
flag_tls_default = TLS_MODEL_LOCAL_EXEC;
|
|
else
|
|
warning (0, "unknown tls-model \"%s\"", arg);
|
|
break;
|
|
|
|
case OPT_ftracer:
|
|
flag_tracer_set = true;
|
|
break;
|
|
|
|
case OPT_funroll_loops:
|
|
flag_unroll_loops_set = true;
|
|
break;
|
|
|
|
case OPT_g:
|
|
set_debug_level (NO_DEBUG, DEFAULT_GDB_EXTENSIONS, arg);
|
|
break;
|
|
|
|
case OPT_gcoff:
|
|
set_debug_level (SDB_DEBUG, false, arg);
|
|
break;
|
|
|
|
case OPT_gdwarf_2:
|
|
set_debug_level (DWARF2_DEBUG, false, arg);
|
|
break;
|
|
|
|
case OPT_ggdb:
|
|
set_debug_level (NO_DEBUG, 2, arg);
|
|
break;
|
|
|
|
case OPT_gstabs:
|
|
case OPT_gstabs_:
|
|
set_debug_level (DBX_DEBUG, code == OPT_gstabs_, arg);
|
|
break;
|
|
|
|
case OPT_gvms:
|
|
set_debug_level (VMS_DEBUG, false, arg);
|
|
break;
|
|
|
|
case OPT_gxcoff:
|
|
case OPT_gxcoff_:
|
|
set_debug_level (XCOFF_DEBUG, code == OPT_gxcoff_, arg);
|
|
break;
|
|
|
|
case OPT_o:
|
|
asm_file_name = arg;
|
|
break;
|
|
|
|
case OPT_pedantic_errors:
|
|
flag_pedantic_errors = pedantic = 1;
|
|
break;
|
|
|
|
case OPT_fforce_mem:
|
|
warning (0, "-f[no-]force-mem is nop and option will be removed in 4.3");
|
|
break;
|
|
|
|
case OPT_floop_optimize:
|
|
case OPT_frerun_loop_opt:
|
|
case OPT_fstrength_reduce:
|
|
/* These are no-ops, preserved for backward compatibility. */
|
|
break;
|
|
|
|
default:
|
|
/* If the flag was handled in a standard way, assume the lack of
|
|
processing here is intentional. */
|
|
gcc_assert (cl_options[scode].flag_var);
|
|
break;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
/* Handle --param NAME=VALUE. */
|
|
static void
|
|
handle_param (const char *carg)
|
|
{
|
|
char *equal, *arg;
|
|
int value;
|
|
|
|
arg = xstrdup (carg);
|
|
equal = strchr (arg, '=');
|
|
if (!equal)
|
|
error ("%s: --param arguments should be of the form NAME=VALUE", arg);
|
|
else
|
|
{
|
|
value = integral_argument (equal + 1);
|
|
if (value == -1)
|
|
error ("invalid --param value %qs", equal + 1);
|
|
else
|
|
{
|
|
*equal = '\0';
|
|
set_param_value (arg, value);
|
|
}
|
|
}
|
|
|
|
free (arg);
|
|
}
|
|
|
|
/* Handle -W and -Wextra. */
|
|
static void
|
|
set_Wextra (int setting)
|
|
{
|
|
extra_warnings = setting;
|
|
warn_unused_value = setting;
|
|
warn_unused_parameter = (setting && maybe_warn_unused_parameter);
|
|
|
|
/* We save the value of warn_uninitialized, since if they put
|
|
-Wuninitialized on the command line, we need to generate a
|
|
warning about not using it without also specifying -O. */
|
|
if (setting == 0)
|
|
warn_uninitialized = 0;
|
|
else if (warn_uninitialized != 1)
|
|
warn_uninitialized = 2;
|
|
}
|
|
|
|
/* Initialize unused warning flags. */
|
|
void
|
|
set_Wunused (int setting)
|
|
{
|
|
warn_unused_function = setting;
|
|
warn_unused_label = setting;
|
|
/* Unused function parameter warnings are reported when either
|
|
``-Wextra -Wunused'' or ``-Wunused-parameter'' is specified.
|
|
Thus, if -Wextra has already been seen, set warn_unused_parameter;
|
|
otherwise set maybe_warn_extra_parameter, which will be picked up
|
|
by set_Wextra. */
|
|
maybe_warn_unused_parameter = setting;
|
|
warn_unused_parameter = (setting && extra_warnings);
|
|
warn_unused_variable = setting;
|
|
warn_unused_value = setting;
|
|
}
|
|
|
|
/* The following routines are useful in setting all the flags that
|
|
-ffast-math and -fno-fast-math imply. */
|
|
void
|
|
set_fast_math_flags (int set)
|
|
{
|
|
flag_trapping_math = !set;
|
|
flag_unsafe_math_optimizations = set;
|
|
flag_finite_math_only = set;
|
|
flag_errno_math = !set;
|
|
if (set)
|
|
{
|
|
flag_signaling_nans = 0;
|
|
flag_rounding_math = 0;
|
|
flag_cx_limited_range = 1;
|
|
}
|
|
}
|
|
|
|
/* Return true iff flags are set as if -ffast-math. */
|
|
bool
|
|
fast_math_flags_set_p (void)
|
|
{
|
|
return (!flag_trapping_math
|
|
&& flag_unsafe_math_optimizations
|
|
&& flag_finite_math_only
|
|
&& !flag_errno_math);
|
|
}
|
|
|
|
/* Handle a debug output -g switch. EXTENDED is true or false to support
|
|
extended output (2 is special and means "-ggdb" was given). */
|
|
static void
|
|
set_debug_level (enum debug_info_type type, int extended, const char *arg)
|
|
{
|
|
static bool type_explicit;
|
|
|
|
use_gnu_debug_info_extensions = extended;
|
|
|
|
if (type == NO_DEBUG)
|
|
{
|
|
if (write_symbols == NO_DEBUG)
|
|
{
|
|
write_symbols = PREFERRED_DEBUGGING_TYPE;
|
|
|
|
if (extended == 2)
|
|
{
|
|
#ifdef DWARF2_DEBUGGING_INFO
|
|
write_symbols = DWARF2_DEBUG;
|
|
#elif defined DBX_DEBUGGING_INFO
|
|
write_symbols = DBX_DEBUG;
|
|
#endif
|
|
}
|
|
|
|
if (write_symbols == NO_DEBUG)
|
|
warning (0, "target system does not support debug output");
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* Does it conflict with an already selected type? */
|
|
if (type_explicit && write_symbols != NO_DEBUG && type != write_symbols)
|
|
error ("debug format \"%s\" conflicts with prior selection",
|
|
debug_type_names[type]);
|
|
write_symbols = type;
|
|
type_explicit = true;
|
|
}
|
|
|
|
/* A debug flag without a level defaults to level 2. */
|
|
if (*arg == '\0')
|
|
{
|
|
if (!debug_info_level)
|
|
debug_info_level = 2;
|
|
}
|
|
else
|
|
{
|
|
debug_info_level = integral_argument (arg);
|
|
if (debug_info_level == (unsigned int) -1)
|
|
error ("unrecognised debug output level \"%s\"", arg);
|
|
else if (debug_info_level > 3)
|
|
error ("debug output level %s is too high", arg);
|
|
}
|
|
}
|
|
|
|
/* Display help for target options. */
|
|
static void
|
|
print_target_help (void)
|
|
{
|
|
unsigned int i;
|
|
static bool displayed = false;
|
|
|
|
/* Avoid double printing for --help --target-help. */
|
|
if (displayed)
|
|
return;
|
|
|
|
displayed = true;
|
|
for (i = 0; i < cl_options_count; i++)
|
|
if ((cl_options[i].flags & (CL_TARGET | CL_UNDOCUMENTED)) == CL_TARGET)
|
|
{
|
|
printf (_("\nTarget specific options:\n"));
|
|
print_filtered_help (CL_TARGET);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Output --help text. */
|
|
static void
|
|
print_help (void)
|
|
{
|
|
size_t i;
|
|
const char *p;
|
|
|
|
GET_ENVIRONMENT (p, "COLUMNS");
|
|
if (p)
|
|
{
|
|
int value = atoi (p);
|
|
if (value > 0)
|
|
columns = value;
|
|
}
|
|
|
|
puts (_("The following options are language-independent:\n"));
|
|
|
|
print_filtered_help (CL_COMMON);
|
|
print_param_help ();
|
|
|
|
for (i = 0; lang_names[i]; i++)
|
|
{
|
|
printf (_("The %s front end recognizes the following options:\n\n"),
|
|
lang_names[i]);
|
|
print_filtered_help (1U << i);
|
|
}
|
|
print_target_help ();
|
|
}
|
|
|
|
/* Print the help for --param. */
|
|
static void
|
|
print_param_help (void)
|
|
{
|
|
size_t i;
|
|
|
|
puts (_("The --param option recognizes the following as parameters:\n"));
|
|
|
|
for (i = 0; i < LAST_PARAM; i++)
|
|
{
|
|
const char *help = compiler_params[i].help;
|
|
const char *param = compiler_params[i].option;
|
|
|
|
if (help == NULL || *help == '\0')
|
|
help = undocumented_msg;
|
|
|
|
/* Get the translation. */
|
|
help = _(help);
|
|
|
|
wrap_help (help, param, strlen (param));
|
|
}
|
|
|
|
putchar ('\n');
|
|
}
|
|
|
|
/* Print help for a specific front-end, etc. */
|
|
static void
|
|
print_filtered_help (unsigned int flag)
|
|
{
|
|
unsigned int i, len, filter, indent = 0;
|
|
bool duplicates = false;
|
|
const char *help, *opt, *tab;
|
|
static char *printed;
|
|
|
|
if (flag == CL_COMMON || flag == CL_TARGET)
|
|
{
|
|
filter = flag;
|
|
if (!printed)
|
|
printed = xmalloc (cl_options_count);
|
|
memset (printed, 0, cl_options_count);
|
|
}
|
|
else
|
|
{
|
|
/* Don't print COMMON options twice. */
|
|
filter = flag | CL_COMMON;
|
|
|
|
for (i = 0; i < cl_options_count; i++)
|
|
{
|
|
if ((cl_options[i].flags & filter) != flag)
|
|
continue;
|
|
|
|
/* Skip help for internal switches. */
|
|
if (cl_options[i].flags & CL_UNDOCUMENTED)
|
|
continue;
|
|
|
|
/* Skip switches that have already been printed, mark them to be
|
|
listed later. */
|
|
if (printed[i])
|
|
{
|
|
duplicates = true;
|
|
indent = print_switch (cl_options[i].opt_text, indent);
|
|
}
|
|
}
|
|
|
|
if (duplicates)
|
|
{
|
|
putchar ('\n');
|
|
putchar ('\n');
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < cl_options_count; i++)
|
|
{
|
|
if ((cl_options[i].flags & filter) != flag)
|
|
continue;
|
|
|
|
/* Skip help for internal switches. */
|
|
if (cl_options[i].flags & CL_UNDOCUMENTED)
|
|
continue;
|
|
|
|
/* Skip switches that have already been printed. */
|
|
if (printed[i])
|
|
continue;
|
|
|
|
printed[i] = true;
|
|
|
|
help = cl_options[i].help;
|
|
if (!help)
|
|
help = undocumented_msg;
|
|
|
|
/* Get the translation. */
|
|
help = _(help);
|
|
|
|
tab = strchr (help, '\t');
|
|
if (tab)
|
|
{
|
|
len = tab - help;
|
|
opt = help;
|
|
help = tab + 1;
|
|
}
|
|
else
|
|
{
|
|
opt = cl_options[i].opt_text;
|
|
len = strlen (opt);
|
|
}
|
|
|
|
wrap_help (help, opt, len);
|
|
}
|
|
|
|
putchar ('\n');
|
|
}
|
|
|
|
/* Output ITEM, of length ITEM_WIDTH, in the left column, followed by
|
|
word-wrapped HELP in a second column. */
|
|
static unsigned int
|
|
print_switch (const char *text, unsigned int indent)
|
|
{
|
|
unsigned int len = strlen (text) + 1; /* trailing comma */
|
|
|
|
if (indent)
|
|
{
|
|
putchar (',');
|
|
if (indent + len > columns)
|
|
{
|
|
putchar ('\n');
|
|
putchar (' ');
|
|
indent = 1;
|
|
}
|
|
}
|
|
else
|
|
putchar (' ');
|
|
|
|
putchar (' ');
|
|
fputs (text, stdout);
|
|
|
|
return indent + len + 1;
|
|
}
|
|
|
|
/* Output ITEM, of length ITEM_WIDTH, in the left column, followed by
|
|
word-wrapped HELP in a second column. */
|
|
static void
|
|
wrap_help (const char *help, const char *item, unsigned int item_width)
|
|
{
|
|
unsigned int col_width = 27;
|
|
unsigned int remaining, room, len;
|
|
|
|
remaining = strlen (help);
|
|
|
|
do
|
|
{
|
|
room = columns - 3 - MAX (col_width, item_width);
|
|
if (room > columns)
|
|
room = 0;
|
|
len = remaining;
|
|
|
|
if (room < len)
|
|
{
|
|
unsigned int i;
|
|
|
|
for (i = 0; help[i]; i++)
|
|
{
|
|
if (i >= room && len != remaining)
|
|
break;
|
|
if (help[i] == ' ')
|
|
len = i;
|
|
else if ((help[i] == '-' || help[i] == '/')
|
|
&& help[i + 1] != ' '
|
|
&& i > 0 && ISALPHA (help[i - 1]))
|
|
len = i + 1;
|
|
}
|
|
}
|
|
|
|
printf( " %-*.*s %.*s\n", col_width, item_width, item, len, help);
|
|
item_width = 0;
|
|
while (help[len] == ' ')
|
|
len++;
|
|
help += len;
|
|
remaining -= len;
|
|
}
|
|
while (remaining);
|
|
}
|
|
|
|
/* Return 1 if OPTION is enabled, 0 if it is disabled, or -1 if it isn't
|
|
a simple on-off switch. */
|
|
|
|
int
|
|
option_enabled (int opt_idx)
|
|
{
|
|
const struct cl_option *option = &(cl_options[opt_idx]);
|
|
if (option->flag_var)
|
|
switch (option->var_type)
|
|
{
|
|
case CLVC_BOOLEAN:
|
|
return *(int *) option->flag_var != 0;
|
|
|
|
case CLVC_EQUAL:
|
|
return *(int *) option->flag_var == option->var_value;
|
|
|
|
case CLVC_BIT_CLEAR:
|
|
return (*(int *) option->flag_var & option->var_value) == 0;
|
|
|
|
case CLVC_BIT_SET:
|
|
return (*(int *) option->flag_var & option->var_value) != 0;
|
|
|
|
case CLVC_STRING:
|
|
break;
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
/* Fill STATE with the current state of option OPTION. Return true if
|
|
there is some state to store. */
|
|
|
|
bool
|
|
get_option_state (int option, struct cl_option_state *state)
|
|
{
|
|
if (cl_options[option].flag_var == 0)
|
|
return false;
|
|
|
|
switch (cl_options[option].var_type)
|
|
{
|
|
case CLVC_BOOLEAN:
|
|
case CLVC_EQUAL:
|
|
state->data = cl_options[option].flag_var;
|
|
state->size = sizeof (int);
|
|
break;
|
|
|
|
case CLVC_BIT_CLEAR:
|
|
case CLVC_BIT_SET:
|
|
state->ch = option_enabled (option);
|
|
state->data = &state->ch;
|
|
state->size = 1;
|
|
break;
|
|
|
|
case CLVC_STRING:
|
|
state->data = *(const char **) cl_options[option].flag_var;
|
|
if (state->data == 0)
|
|
state->data = "";
|
|
state->size = strlen (state->data) + 1;
|
|
break;
|
|
}
|
|
return true;
|
|
}
|