/* Command line option handling.
- Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
+ Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007
+ Free Software Foundation, Inc.
Contributed by Neil Booth.
This file is part of GCC.
GCC 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 2, or (at your option) any later
+Software Foundation; either version 3, or (at your option) any later
version.
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
for more details.
You should have received a copy of the GNU General Public License
-along with GCC; see the file COPYING. If not, write to the Free
-Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
-02110-1301, USA. */
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
#include "config.h"
#include "system.h"
#include "insn-attr.h" /* For INSN_SCHEDULING. */
#include "target.h"
#include "tree-pass.h"
+#include "dbgcnt.h"
+#include "debug.h"
/* Value of the -G xx switch, and whether it was passed or not. */
unsigned HOST_WIDE_INT g_switch_value;
bool warn_larger_than;
HOST_WIDE_INT larger_than_size;
-/* Nonzero means warn about constructs which might not be
- strict-aliasing safe. */
-int warn_strict_aliasing;
-
/* Hack for cooperation between set_Wunused and set_Wextra. */
static bool maybe_warn_unused_parameter;
the definitions of the different possible levels. */
enum debug_info_level debug_info_level = DINFO_LEVEL_NONE;
+/* A major contribution to object and executable size is debug
+ information size. A major contribution to debug information size
+ is struct descriptions replicated in several object files. The
+ following flags attempt to reduce this information. The basic
+ idea is to not emit struct debugging information in the current
+ compilation unit when that information will be generated by
+ another compilation unit.
+
+ Debug information for a struct defined in the current source
+ file should be generated in the object file. Likewise the
+ debug information for a struct defined in a header should be
+ generated in the object file of the corresponding source file.
+ Both of these case are handled when the base name of the file of
+ the struct definition matches the base name of the source file
+ of the current compilation unit. This matching emits minimal
+ struct debugging information.
+
+ The base file name matching rule above will fail to emit debug
+ information for structs defined in system headers. So a second
+ category of files includes system headers in addition to files
+ with matching bases.
+
+ The remaining types of files are library headers and application
+ headers. We cannot currently distinguish these two types. */
+
+enum debug_struct_file
+{
+ DINFO_STRUCT_FILE_NONE, /* Debug no structs. */
+ DINFO_STRUCT_FILE_BASE, /* Debug structs defined in files with the
+ same base name as the compilation unit. */
+ DINFO_STRUCT_FILE_SYS, /* Also debug structs defined in system
+ header files. */
+ DINFO_STRUCT_FILE_ANY /* Debug structs defined in all files. */
+};
+
+/* Generic structs (e.g. templates not explicitly specialized)
+ may not have a compilation unit associated with them, and so
+ may need to be treated differently from ordinary structs.
+
+ Structs only handled by reference (indirectly), will also usually
+ not need as much debugging information. */
+
+static enum debug_struct_file debug_struct_ordinary[DINFO_USAGE_NUM_ENUMS]
+ = { DINFO_STRUCT_FILE_ANY, DINFO_STRUCT_FILE_ANY, DINFO_STRUCT_FILE_ANY };
+static enum debug_struct_file debug_struct_generic[DINFO_USAGE_NUM_ENUMS]
+ = { DINFO_STRUCT_FILE_ANY, DINFO_STRUCT_FILE_ANY, DINFO_STRUCT_FILE_ANY };
+
+/* Parse the -femit-struct-debug-detailed option value
+ and set the flag variables. */
+
+#define MATCH( prefix, string ) \
+ ((strncmp (prefix, string, sizeof prefix - 1) == 0) \
+ ? ((string += sizeof prefix - 1), 1) : 0)
+
+void
+set_struct_debug_option (const char *spec)
+{
+ /* various labels for comparison */
+ static char dfn_lbl[] = "dfn:", dir_lbl[] = "dir:", ind_lbl[] = "ind:";
+ static char ord_lbl[] = "ord:", gen_lbl[] = "gen:";
+ static char none_lbl[] = "none", any_lbl[] = "any";
+ static char base_lbl[] = "base", sys_lbl[] = "sys";
+
+ enum debug_struct_file files = DINFO_STRUCT_FILE_ANY;
+ /* Default is to apply to as much as possible. */
+ enum debug_info_usage usage = DINFO_USAGE_NUM_ENUMS;
+ int ord = 1, gen = 1;
+
+ /* What usage? */
+ if (MATCH (dfn_lbl, spec))
+ usage = DINFO_USAGE_DFN;
+ else if (MATCH (dir_lbl, spec))
+ usage = DINFO_USAGE_DIR_USE;
+ else if (MATCH (ind_lbl, spec))
+ usage = DINFO_USAGE_IND_USE;
+
+ /* Generics or not? */
+ if (MATCH (ord_lbl, spec))
+ gen = 0;
+ else if (MATCH (gen_lbl, spec))
+ ord = 0;
+
+ /* What allowable environment? */
+ if (MATCH (none_lbl, spec))
+ files = DINFO_STRUCT_FILE_NONE;
+ else if (MATCH (any_lbl, spec))
+ files = DINFO_STRUCT_FILE_ANY;
+ else if (MATCH (sys_lbl, spec))
+ files = DINFO_STRUCT_FILE_SYS;
+ else if (MATCH (base_lbl, spec))
+ files = DINFO_STRUCT_FILE_BASE;
+ else
+ error ("argument %qs to %<-femit-struct-debug-detailed%> not recognized",
+ spec);
+
+ /* Effect the specification. */
+ if (usage == DINFO_USAGE_NUM_ENUMS)
+ {
+ if (ord)
+ {
+ debug_struct_ordinary[DINFO_USAGE_DFN] = files;
+ debug_struct_ordinary[DINFO_USAGE_DIR_USE] = files;
+ debug_struct_ordinary[DINFO_USAGE_IND_USE] = files;
+ }
+ if (gen)
+ {
+ debug_struct_generic[DINFO_USAGE_DFN] = files;
+ debug_struct_generic[DINFO_USAGE_DIR_USE] = files;
+ debug_struct_generic[DINFO_USAGE_IND_USE] = files;
+ }
+ }
+ else
+ {
+ if (ord)
+ debug_struct_ordinary[usage] = files;
+ if (gen)
+ debug_struct_generic[usage] = files;
+ }
+
+ if (*spec == ',')
+ set_struct_debug_option (spec+1);
+ else
+ {
+ /* No more -femit-struct-debug-detailed specifications.
+ Do final checks. */
+ if (*spec != '\0')
+ error ("argument %qs to %<-femit-struct-debug-detailed%> unknown",
+ spec);
+ if (debug_struct_ordinary[DINFO_USAGE_DIR_USE]
+ < debug_struct_ordinary[DINFO_USAGE_IND_USE]
+ || debug_struct_generic[DINFO_USAGE_DIR_USE]
+ < debug_struct_generic[DINFO_USAGE_IND_USE])
+ error ("%<-femit-struct-debug-detailed=dir:...%> must allow at least"
+ " as much as %<-femit-struct-debug-detailed=ind:...%>");
+ }
+}
+
+/* Find the base name of a path, stripping off both directories and
+ a single final extension. */
+static int
+base_of_path (const char *path, const char **base_out)
+{
+ const char *base = path;
+ const char *dot = 0;
+ const char *p = path;
+ char c = *p;
+ while (c)
+ {
+ if (IS_DIR_SEPARATOR(c))
+ {
+ base = p + 1;
+ dot = 0;
+ }
+ else if (c == '.')
+ dot = p;
+ c = *++p;
+ }
+ if (!dot)
+ dot = p;
+ *base_out = base;
+ return dot - base;
+}
+
+/* Match the base name of a file to the base name of a compilation unit. */
+
+static const char *main_input_basename;
+static int main_input_baselength;
+
+static int
+matches_main_base (const char *path)
+{
+ /* Cache the last query. */
+ static const char *last_path = NULL;
+ static int last_match = 0;
+ if (path != last_path)
+ {
+ const char *base;
+ int length = base_of_path (path, &base);
+ last_path = path;
+ last_match = (length == main_input_baselength
+ && memcmp (base, main_input_basename, length) == 0);
+ }
+ return last_match;
+}
+
+#ifdef DEBUG_DEBUG_STRUCT
+
+static int
+dump_struct_debug (tree type, enum debug_info_usage usage,
+ enum debug_struct_file criterion, int generic,
+ int matches, int result)
+{
+ /* Find the type name. */
+ tree type_decl = TYPE_STUB_DECL (type);
+ tree t = type_decl;
+ const char *name = 0;
+ if (TREE_CODE (t) == TYPE_DECL)
+ t = DECL_NAME (t);
+ if (t)
+ name = IDENTIFIER_POINTER (t);
+
+ fprintf (stderr, " struct %d %s %s %s %s %d %p %s\n",
+ criterion,
+ DECL_IN_SYSTEM_HEADER (type_decl) ? "sys" : "usr",
+ matches ? "bas" : "hdr",
+ generic ? "gen" : "ord",
+ usage == DINFO_USAGE_DFN ? ";" :
+ usage == DINFO_USAGE_DIR_USE ? "." : "*",
+ result,
+ (void*) type_decl, name);
+ return result;
+}
+#define DUMP_GSTRUCT(type, usage, criterion, generic, matches, result) \
+ dump_struct_debug (type, usage, criterion, generic, matches, result)
+
+#else
+
+#define DUMP_GSTRUCT(type, usage, criterion, generic, matches, result) \
+ (result)
+
+#endif
+
+
+bool
+should_emit_struct_debug (tree type, enum debug_info_usage usage)
+{
+ enum debug_struct_file criterion;
+ tree type_decl;
+ bool generic = lang_hooks.types.generic_p (type);
+
+ if (generic)
+ criterion = debug_struct_generic[usage];
+ else
+ criterion = debug_struct_ordinary[usage];
+
+ if (criterion == DINFO_STRUCT_FILE_NONE)
+ return DUMP_GSTRUCT (type, usage, criterion, generic, false, false);
+ if (criterion == DINFO_STRUCT_FILE_ANY)
+ return DUMP_GSTRUCT (type, usage, criterion, generic, false, true);
+
+ type_decl = TYPE_STUB_DECL (type);
+
+ if (criterion == DINFO_STRUCT_FILE_SYS && DECL_IN_SYSTEM_HEADER (type_decl))
+ return DUMP_GSTRUCT (type, usage, criterion, generic, false, true);
+
+ if (matches_main_base (DECL_SOURCE_FILE (type_decl)))
+ return DUMP_GSTRUCT (type, usage, criterion, generic, true, true);
+ return DUMP_GSTRUCT (type, usage, criterion, generic, false, false);
+}
+
/* Nonzero means use GNU-only extensions in the generated symbolic
debugging information. Currently, this only has an effect when
write_symbols is set to DBX_DEBUG, XCOFF_DEBUG, or DWARF_DEBUG. */
/* Disable unit-at-a-time for frontends that might be still broken in this
respect. */
-
+
bool no_unit_at_a_time_default;
/* Global visibility options. */
struct visibility_flags visibility_options;
-/* Columns of --help display. */
-static unsigned int columns = 80;
-
/* What to print when a switch has no documentation. */
static const char undocumented_msg[] = N_("This switch lacks documentation");
static bool flag_unroll_loops_set, flag_tracer_set;
static bool flag_value_profile_transformations_set;
static bool flag_peel_loops_set, flag_branch_probabilities_set;
+static bool flag_inline_functions_set;
+
+/* Functions excluded from profiling. */
+
+typedef char *char_p; /* For DEF_VEC_P. */
+DEF_VEC_P(char_p);
+DEF_VEC_ALLOC_P(char_p,heap);
+
+static VEC(char_p,heap) *flag_instrument_functions_exclude_functions;
+static VEC(char_p,heap) *flag_instrument_functions_exclude_files;
/* Input file names. */
const char **in_fnames;
unsigned num_in_fnames;
-static size_t find_opt (const char *, int);
static int common_handle_option (size_t scode, const char *arg, int value,
unsigned int lang_mask);
static void handle_param (const char *);
static void complain_wrong_lang (const char *, const struct cl_option *,
unsigned int lang_mask);
static void handle_options (unsigned int, const char **, unsigned int);
-static void wrap_help (const char *help, const char *item, unsigned int);
-static void print_target_help (void);
-static void print_help (void);
-static void print_param_help (void);
-static void print_filtered_help (unsigned int);
-static unsigned int print_switch (const char *text, unsigned int indent);
static void set_debug_level (enum debug_info_type type, int extended,
const char *arg);
-/* Perform a binary search to find which option the command-line INPUT
- matches. Returns its index in the option array, and N_OPTS
- (cl_options_count) on failure.
-
- This routine is quite subtle. A normal binary search is not good
- enough because some options can be suffixed with an argument, and
- multiple sub-matches can occur, e.g. input of "-pedantic" matching
- the initial substring of "-pedantic-errors".
-
- A more complicated example is -gstabs. It should match "-g" with
- an argument of "stabs". Suppose, however, that the number and list
- of switches are such that the binary search tests "-gen-decls"
- before having tested "-g". This doesn't match, and as "-gen-decls"
- is less than "-gstabs", it will become the lower bound of the
- binary search range, and "-g" will never be seen. To resolve this
- issue, opts.sh makes "-gen-decls" point, via the back_chain member,
- to "-g" so that failed searches that end between "-gen-decls" and
- the lexicographically subsequent switch know to go back and see if
- "-g" causes a match (which it does in this example).
-
- This search is done in such a way that the longest match for the
- front end in question wins. If there is no match for the current
- front end, the longest match for a different front end is returned
- (or N_OPTS if none) and the caller emits an error message. */
-static size_t
-find_opt (const char *input, int lang_mask)
-{
- size_t mn, mx, md, opt_len;
- size_t match_wrong_lang;
- int comp;
-
- mn = 0;
- mx = cl_options_count;
-
- /* Find mn such this lexicographical inequality holds:
- cl_options[mn] <= input < cl_options[mn + 1]. */
- while (mx - mn > 1)
- {
- md = (mn + mx) / 2;
- opt_len = cl_options[md].opt_len;
- comp = strncmp (input, cl_options[md].opt_text + 1, opt_len);
-
- if (comp < 0)
- mx = md;
- else
- mn = md;
- }
-
- /* This is the switch that is the best match but for a different
- front end, or cl_options_count if there is no match at all. */
- match_wrong_lang = cl_options_count;
-
- /* Backtrace the chain of possible matches, returning the longest
- one, if any, that fits best. With current GCC switches, this
- loop executes at most twice. */
- do
- {
- const struct cl_option *opt = &cl_options[mn];
-
- /* Is the input either an exact match or a prefix that takes a
- joined argument? */
- if (!strncmp (input, opt->opt_text + 1, opt->opt_len)
- && (input[opt->opt_len] == '\0' || (opt->flags & CL_JOINED)))
- {
- /* If language is OK, return it. */
- if (opt->flags & lang_mask)
- return mn;
-
- /* If we haven't remembered a prior match, remember this
- one. Any prior match is necessarily better. */
- if (match_wrong_lang == cl_options_count)
- match_wrong_lang = mn;
- }
-
- /* Try the next possibility. This is cl_options_count if there
- are no more. */
- mn = opt->back_chain;
- }
- while (mn != cl_options_count);
-
- /* Return the best wrong match, or cl_options_count if none. */
- return match_wrong_lang;
-}
-
/* If ARG is a non-negative integer made up solely of digits, return its
value, otherwise return -1. */
static int
complain_wrong_lang (argv[0], option, lang_mask);
goto done;
}
+ else if ((option->flags & CL_TARGET)
+ && (option->flags & CL_LANG_ALL)
+ && !(option->flags & lang_mask))
+ {
+ /* Complain for target flag language mismatches if any languages
+ are specified. */
+ complain_wrong_lang (argv[0], option, lang_mask);
+ goto done;
+ }
if (arg == NULL && (option->flags & (CL_JOINED | CL_SEPARATE)))
{
*(const char **) option->flag_var = arg;
break;
}
-
+
if (option->flags & lang_mask)
if (lang_hooks.handle_option (opt_index, arg, value) == 0)
result = 0;
in_fnames[num_in_fnames - 1] = filename;
}
+/* Add functions or file names to a vector of names to exclude from
+ instrumentation. */
+
+static void
+add_instrument_functions_exclude_list (VEC(char_p,heap) **pvec,
+ const char* arg)
+{
+ char *tmp;
+ char *r;
+ char *w;
+ char *token_start;
+
+ /* We never free this string. */
+ tmp = xstrdup (arg);
+
+ r = tmp;
+ w = tmp;
+ token_start = tmp;
+
+ while (*r != '\0')
+ {
+ if (*r == ',')
+ {
+ *w++ = '\0';
+ ++r;
+ VEC_safe_push (char_p, heap, *pvec, token_start);
+ token_start = w;
+ }
+ if (*r == '\\' && r[1] == ',')
+ {
+ *w++ = ',';
+ r += 2;
+ }
+ else
+ *w++ = *r++;
+ }
+ if (*token_start != '\0')
+ VEC_safe_push (char_p, heap, *pvec, token_start);
+}
+
+/* Return whether we should exclude FNDECL from instrumentation. */
+
+bool
+flag_instrument_functions_exclude_p (tree fndecl)
+{
+ if (VEC_length (char_p, flag_instrument_functions_exclude_functions) > 0)
+ {
+ const char *name;
+ int i;
+ char *s;
+
+ name = lang_hooks.decl_printable_name (fndecl, 0);
+ for (i = 0;
+ VEC_iterate (char_p, flag_instrument_functions_exclude_functions,
+ i, s);
+ ++i)
+ {
+ if (strstr (name, s) != NULL)
+ return true;
+ }
+ }
+
+ if (VEC_length (char_p, flag_instrument_functions_exclude_files) > 0)
+ {
+ const char *name;
+ int i;
+ char *s;
+
+ name = DECL_SOURCE_FILE (fndecl);
+ for (i = 0;
+ VEC_iterate (char_p, flag_instrument_functions_exclude_files, i, s);
+ ++i)
+ {
+ if (strstr (name, s) != NULL)
+ return true;
+ }
+ }
+
+ return false;
+}
+
/* Decode and handle the vector of command line options. LANG_MASK
contains has a single bit set representing the current
language. */
if (opt[0] != '-' || opt[1] == '\0')
{
if (main_input_filename == NULL)
+ {
main_input_filename = opt;
+ main_input_baselength
+ = base_of_path (main_input_filename, &main_input_basename);
+ }
add_input_filename (opt);
n = 1;
continue;
flag_if_conversion2 = 1;
flag_ipa_pure_const = 1;
flag_ipa_reference = 1;
+ flag_split_wide_types = 1;
flag_tree_ccp = 1;
flag_tree_dce = 1;
flag_tree_dom = 1;
flag_tree_dse = 1;
flag_tree_ter = 1;
- flag_tree_live_range_split = 1;
flag_tree_sra = 1;
flag_tree_copyrename = 1;
flag_tree_fre = 1;
if (optimize >= 2)
{
+ flag_inline_small_functions = 1;
flag_thread_jumps = 1;
flag_crossjumping = 1;
flag_optimize_sibling_calls = 1;
+ flag_forward_propagate = 1;
flag_cse_follow_jumps = 1;
- flag_cse_skip_blocks = 1;
flag_gcse = 1;
flag_expensive_optimizations = 1;
- flag_ipa_type_escape = 1;
- flag_strength_reduce = 1;
flag_rerun_cse_after_loop = 1;
flag_caller_saves = 1;
flag_peephole2 = 1;
#endif
flag_regmove = 1;
flag_strict_aliasing = 1;
+ flag_strict_overflow = 1;
flag_delete_null_pointer_checks = 1;
flag_reorder_blocks = 1;
flag_reorder_functions = 1;
flag_tree_store_ccp = 1;
- flag_tree_store_copy_prop = 1;
flag_tree_vrp = 1;
if (!optimize_size)
/* PRE tends to generate bigger code. */
flag_tree_pre = 1;
}
+
+ /* Allow more virtual operators to increase alias precision. */
+ set_param_value ("max-aliased-vops", 500);
}
if (optimize >= 3)
{
+ flag_predictive_commoning = 1;
flag_inline_functions = 1;
flag_unswitch_loops = 1;
flag_gcse_after_reload = 1;
+ flag_tree_vectorize = 1;
+
+ /* Allow even more virtual operators. */
+ set_param_value ("max-aliased-vops", 1000);
+ set_param_value ("avg-aliased-vops", 3);
}
if (optimize < 2 || optimize_size)
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);
+ /* Inlining of functions reducing size is a good idea regardless
+ of them being declared inline. */
flag_inline_functions = 1;
/* We want to crossjump as much as possible. */
if (flag_really_no_inline == 2)
flag_really_no_inline = flag_no_inline;
+ /* Inlining of functions called just once will only work if we can look
+ at the complete translation unit. */
+ if (flag_inline_functions_called_once && !flag_unit_at_a_time)
+ {
+ flag_inline_functions_called_once = 0;
+ warning (OPT_Wdisabled_optimization,
+ "-funit-at-a-time is required for inlining of functions "
+ "that are only called once");
+ }
+
/* 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
if (flag_exceptions && flag_reorder_blocks_and_partition)
{
- inform
+ inform
("-freorder-blocks-and-partition does not work with exceptions");
flag_reorder_blocks_and_partition = 0;
flag_reorder_blocks = 1;
&& (!targetm.have_named_sections
|| (flag_unwind_tables && targetm.unwind_tables_default)))
{
- inform
+ inform
("-freorder-blocks-and-partition does not work on this architecture");
flag_reorder_blocks_and_partition = 0;
flag_reorder_blocks = 1;
}
}
+#define LEFT_COLUMN 27
+
+/* 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 columns)
+{
+ unsigned int col_width = LEFT_COLUMN;
+ 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);
+}
+
+/* Print help for a specific front-end, etc. */
+static void
+print_filtered_help (unsigned int include_flags,
+ unsigned int exclude_flags,
+ unsigned int any_flags,
+ unsigned int columns)
+{
+ unsigned int i;
+ const char *help;
+ static char *printed = NULL;
+ bool found = false;
+ bool displayed = false;
+
+ if (include_flags == CL_PARAMS)
+ {
+ for (i = 0; i < LAST_PARAM; i++)
+ {
+ const char *param = compiler_params[i].option;
+
+ help = compiler_params[i].help;
+ if (help == NULL || *help == '\0')
+ {
+ if (exclude_flags & CL_UNDOCUMENTED)
+ continue;
+ help = undocumented_msg;
+ }
+
+ /* Get the translation. */
+ help = _(help);
+
+ wrap_help (help, param, strlen (param), columns);
+ }
+ putchar ('\n');
+ return;
+ }
+
+ if (!printed)
+ printed = xcalloc (1, cl_options_count);
+
+ for (i = 0; i < cl_options_count; i++)
+ {
+ static char new_help[128];
+ const struct cl_option *option = cl_options + i;
+ unsigned int len;
+ const char *opt;
+ const char *tab;
+
+ if (include_flags == 0
+ || ((option->flags & include_flags) != include_flags))
+ {
+ if ((option->flags & any_flags) == 0)
+ continue;
+ }
+
+ /* Skip unwanted switches. */
+ if ((option->flags & exclude_flags) != 0)
+ continue;
+
+ found = true;
+ /* Skip switches that have already been printed. */
+ if (printed[i])
+ continue;
+
+ printed[i] = true;
+
+ help = option->help;
+ if (help == NULL)
+ {
+ if (exclude_flags & CL_UNDOCUMENTED)
+ continue;
+ help = undocumented_msg;
+ }
+
+ /* Get the translation. */
+ help = _(help);
+
+ /* Find the gap between the name of the
+ option and its descriptive text. */
+ tab = strchr (help, '\t');
+ if (tab)
+ {
+ len = tab - help;
+ opt = help;
+ help = tab + 1;
+ }
+ else
+ {
+ opt = option->opt_text;
+ len = strlen (opt);
+ }
+
+ /* With the -Q option enabled we change the descriptive text associated
+ with an option to be an indication of its current setting. */
+ if (!quiet_flag)
+ {
+ if (len < (LEFT_COLUMN + 2))
+ strcpy (new_help, "\t\t");
+ else
+ strcpy (new_help, "\t");
+
+ if (option->flag_var != NULL)
+ {
+ if (option->flags & CL_JOINED)
+ {
+ if (option->var_type == CLVC_STRING)
+ {
+ if (* (const char **) option->flag_var != NULL)
+ snprintf (new_help + strlen (new_help),
+ sizeof (new_help) - strlen (new_help),
+ * (const char **) option->flag_var);
+ }
+ else
+ sprintf (new_help + strlen (new_help),
+ "%#x", * (int *) option->flag_var);
+ }
+ else
+ strcat (new_help, option_enabled (i)
+ ? _("[enabled]") : _("[disabled]"));
+ }
+
+ help = new_help;
+ }
+
+ wrap_help (help, opt, len, columns);
+ displayed = true;
+ }
+
+ if (! found)
+ printf (_(" No options with the desired characteristics were found\n"));
+ else if (! displayed)
+ printf (_(" All options with the desired characteristics have already been displayed\n"));
+
+ putchar ('\n');
+}
+
+/* Display help for a specified type of option.
+ The options must have ALL of the INCLUDE_FLAGS set
+ ANY of the flags in the ANY_FLAGS set
+ and NONE of the EXCLUDE_FLAGS set. */
+static void
+print_specific_help (unsigned int include_flags,
+ unsigned int exclude_flags,
+ unsigned int any_flags)
+{
+ unsigned int all_langs_mask = (1U << cl_lang_count) - 1;
+ const char * description = NULL;
+ const char * descrip_extra = "";
+ size_t i;
+ unsigned int flag;
+ static unsigned int columns = 0;
+
+ /* Sanity check: Make sure that we do not have more
+ languages than we have bits available to enumerate them. */
+ gcc_assert ((1U << cl_lang_count) < CL_MIN_OPTION_CLASS);
+
+ /* If we have not done so already, obtain
+ the desired maximum width of the output. */
+ if (columns == 0)
+ {
+ const char *p;
+
+ GET_ENVIRONMENT (p, "COLUMNS");
+ if (p != NULL)
+ {
+ int value = atoi (p);
+
+ if (value > 0)
+ columns = value;
+ }
+
+ if (columns == 0)
+ /* Use a reasonable default. */
+ columns = 80;
+ }
+
+ /* Decide upon the title for the options that we are going to display. */
+ for (i = 0, flag = 1; flag <= CL_MAX_OPTION_CLASS; flag <<= 1, i ++)
+ {
+ switch (flag & include_flags)
+ {
+ case 0:
+ break;
+
+ case CL_TARGET:
+ description = _("The following options are target specific");
+ break;
+ case CL_WARNING:
+ description = _("The following options control compiler warning messages");
+ break;
+ case CL_OPTIMIZATION:
+ description = _("The following options control optimizations");
+ break;
+ case CL_COMMON:
+ description = _("The following options are language-independent");
+ break;
+ case CL_PARAMS:
+ description = _("The --param option recognizes the following as parameters");
+ break;
+ default:
+ if (i >= cl_lang_count)
+ break;
+ if ((exclude_flags & ((1U << cl_lang_count) - 1)) != 0)
+ {
+ description = _("The following options are specific to the language ");
+ descrip_extra = lang_names [i];
+ }
+ else
+ description = _("The following options are supported by the language ");
+ descrip_extra = lang_names [i];
+ break;
+ }
+ }
+
+ if (description == NULL)
+ {
+ if (any_flags == 0)
+ {
+ if (include_flags == CL_UNDOCUMENTED)
+ description = _("The following options are not documented");
+ else
+ {
+ internal_error ("unrecognized include_flags 0x%x passed to print_specific_help",
+ include_flags);
+ return;
+ }
+ }
+ else
+ {
+ if (any_flags & all_langs_mask)
+ description = _("The following options are language-related");
+ else
+ description = _("The following options are language-independent");
+ }
+ }
+
+ printf ("%s%s:\n", description, descrip_extra);
+ print_filtered_help (include_flags, exclude_flags, any_flags, columns);
+}
+
/* 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
switch (code)
{
- case OPT__help:
- print_help ();
- exit_after_options = true;
- break;
-
case OPT__param:
handle_param (arg);
break;
+ case OPT_fhelp:
+ case OPT__help:
+ {
+ unsigned int all_langs_mask = (1U << cl_lang_count) - 1;
+ unsigned int undoc_mask;
+ unsigned int i;
+
+ undoc_mask = extra_warnings ? 0 : CL_UNDOCUMENTED;
+ /* First display any single language specific options. */
+ for (i = 0; i < cl_lang_count; i++)
+ print_specific_help
+ (1U << i, (all_langs_mask & (~ (1U << i))) | undoc_mask, 0);
+ /* Next display any multi language specific options. */
+ print_specific_help (0, undoc_mask, all_langs_mask);
+ /* Then display any remaining, non-language options. */
+ for (i = CL_MIN_OPTION_CLASS; i <= CL_MAX_OPTION_CLASS; i <<= 1)
+ print_specific_help (i, undoc_mask, 0);
+ exit_after_options = true;
+ break;
+ }
+
+ case OPT_ftarget_help:
case OPT__target_help:
- print_target_help ();
+ print_specific_help (CL_TARGET, CL_UNDOCUMENTED, 0);
exit_after_options = true;
+
+ /* Allow the target a chance to give the user some additional information. */
+ if (targetm.target_help)
+ targetm.target_help ();
break;
+ case OPT_fhelp_:
+ case OPT__help_:
+ {
+ const char * a = arg;
+ unsigned int include_flags = 0;
+ /* Note - by default we include undocumented options when listing
+ specific classes. If you only want to see documented options
+ then add ",^undocumented" to the --help= option. e.g.:
+
+ --help=target,^undocumented */
+ unsigned int exclude_flags = 0;
+
+ /* Walk along the argument string, parsing each word in turn.
+ The format is:
+ arg = [^]{word}[,{arg}]
+ word = {optimizers|target|warnings|undocumented|
+ params|common|<language>} */
+ while (* a != 0)
+ {
+ static struct
+ {
+ const char * string;
+ unsigned int flag;
+ }
+ specifics[] =
+ {
+ { "optimizers", CL_OPTIMIZATION },
+ { "target", CL_TARGET },
+ { "warnings", CL_WARNING },
+ { "undocumented", CL_UNDOCUMENTED },
+ { "params", CL_PARAMS },
+ { "joined", CL_JOINED },
+ { "separate", CL_SEPARATE },
+ { "common", CL_COMMON },
+ { NULL, 0 }
+ };
+ unsigned int * pflags;
+ char * comma;
+ unsigned int len;
+ unsigned int i;
+
+ if (* a == '^')
+ {
+ ++ a;
+ pflags = & exclude_flags;
+ }
+ else
+ pflags = & include_flags;
+
+ comma = strchr (a, ',');
+ if (comma == NULL)
+ len = strlen (a);
+ else
+ len = comma - a;
+
+ for (i = 0; specifics[i].string != NULL; i++)
+ if (strncasecmp (a, specifics[i].string, len) == 0)
+ {
+ * pflags |= specifics[i].flag;
+ break;
+ }
+
+ if (specifics[i].string == NULL)
+ {
+ /* Check to see if the string matches a language name. */
+ for (i = 0; i < cl_lang_count; i++)
+ if (strncasecmp (a, lang_names[i], len) == 0)
+ {
+ * pflags |= 1U << i;
+ break;
+ }
+
+ if (i == cl_lang_count)
+ fnotice (stderr,
+ "warning: unrecognized argument to --help= switch: %.*s\n",
+ len, a);
+ }
+
+ if (comma == NULL)
+ break;
+ a = comma + 1;
+ }
+
+ if (include_flags)
+ print_specific_help (include_flags, exclude_flags, 0);
+ exit_after_options = true;
+ break;
+ }
+
case OPT__version:
print_version (stderr, "");
exit_after_options = true;
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);
- }
- }
+ enable_warning_as_error (arg, value, lang_mask);
break;
case OPT_Wextra:
break;
case OPT_Wstrict_aliasing:
+ set_Wstrict_aliasing (value);
+ break;
+
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;
fix_register (arg, 0, 0);
break;
+ case OPT_fdbg_cnt_:
+ dbg_cnt_process_opt (arg);
+ break;
+
+ case OPT_fdbg_cnt_list:
+ dbg_cnt_list_all_counters ();
+ break;
+
+ case OPT_fdebug_prefix_map_:
+ add_debug_prefix_map (arg);
+ break;
+
case OPT_fdiagnostics_show_location_:
if (!strcmp (arg, "once"))
diagnostic_prefixing_rule (global_dc) = DIAGNOSTICS_SHOW_PREFIX_ONCE;
set_fast_math_flags (value);
break;
+ case OPT_funsafe_math_optimizations:
+ set_unsafe_math_optimizations_flags (value);
+ break;
+
case OPT_ffixed_:
fix_register (arg, 1, 1);
break;
set_param_value ("max-inline-insns-auto", value / 2);
break;
+ case OPT_finstrument_functions_exclude_function_list_:
+ add_instrument_functions_exclude_list
+ (&flag_instrument_functions_exclude_functions, arg);
+ break;
+
+ case OPT_finstrument_functions_exclude_file_list_:
+ add_instrument_functions_exclude_list
+ (&flag_instrument_functions_exclude_files, arg);
+ 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);
+ error ("structure alignment must be a small power of two, not %d", value);
else
{
initial_max_fld_align = value;
profile_arc_flag_set = true;
break;
+ case OPT_finline_functions:
+ flag_inline_functions_set = true;
+ break;
+
case OPT_fprofile_use:
if (!flag_branch_probabilities_set)
flag_branch_probabilities = value;
flag_tracer = value;
if (!flag_value_profile_transformations_set)
flag_value_profile_transformations = value;
+ if (!flag_inline_functions_set)
+ flag_inline_functions = value;
break;
case OPT_fprofile_generate:
flag_profile_values = value;
if (!flag_value_profile_transformations_set)
flag_value_profile_transformations = value;
+ if (!flag_inline_functions_set)
+ flag_inline_functions = value;
break;
case OPT_fprofile_values:
/* The real switch is -fno-random-seed. */
if (value)
return 0;
- flag_random_seed = NULL;
+ set_random_seed (NULL);
break;
case OPT_frandom_seed_:
- flag_random_seed = arg;
+ set_random_seed (arg);
break;
case OPT_fsched_verbose_:
flag_pedantic_errors = pedantic = 1;
break;
- case OPT_fforce_mem:
- warning (0, "-f[no-]force-mem is nop and option will be removed in 4.2");
+ case OPT_floop_optimize:
+ case OPT_frerun_loop_opt:
+ case OPT_fstrength_reduce:
+ case OPT_ftree_store_copy_prop:
+ case OPT_fforce_addr:
+ /* These are no-ops, preserved for backward compatibility. */
break;
default:
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
warn_unused_value = setting;
}
+/* Used to set the level of strict aliasing warnings,
+ when no level is specified (i.e., when -Wstrict-aliasing, and not
+ -Wstrict-aliasing=level was given).
+ ONOFF is assumed to take value 1 when -Wstrict-aliasing is specified,
+ and 0 otherwise. After calling this function, wstrict_aliasing will be
+ set to the default value of -Wstrict_aliasing=level, currently 3. */
+void
+set_Wstrict_aliasing (int onoff)
+{
+ gcc_assert (onoff == 0 || onoff == 1);
+ if (onoff != 0)
+ warn_strict_aliasing = 3;
+}
+
/* 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;
+ set_unsafe_math_optimizations_flags (set);
flag_finite_math_only = set;
flag_errno_math = !set;
if (set)
}
}
+/* When -funsafe-math-optimizations is set the following
+ flags are set as well. */
+void
+set_unsafe_math_optimizations_flags (int set)
+{
+ flag_trapping_math = !set;
+ flag_signed_zeros = !set;
+ flag_associative_math = set;
+ flag_reciprocal_math = set;
+}
+
/* 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_signed_zeros
&& !flag_errno_math);
}
}
}
-/* 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. */
option_enabled (int opt_idx)
{
const struct cl_option *option = &(cl_options[opt_idx]);
+
if (option->flag_var)
switch (option->var_type)
{
}
return true;
}
+
+/* Enable a warning option as an error. This is used by -Werror= and
+ also by legacy Werror-implicit-function-declaration. */
+
+void
+enable_warning_as_error (const char *arg, int value, unsigned int lang_mask)
+{
+ 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);
+}
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