/* Command line option handling.
- Copyright (C) 2002, 2003 Free Software Foundation, Inc.
+ Copyright (C) 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
Contributed by Neil Booth.
This file is part of GCC.
#include "config.h"
#include "system.h"
+#include "intl.h"
#include "coretypes.h"
#include "tm.h"
#include "tree.h"
#include "diagnostic.h"
#include "tm_p.h" /* For OPTIMIZATION_OPTIONS. */
#include "insn-attr.h" /* For INSN_SCHEDULING. */
+#include "target.h"
/* Value of the -G xx switch, and whether it was passed or not. */
unsigned HOST_WIDE_INT g_switch_value;
/* True if we should exit after parsing options. */
bool exit_after_options;
-/* If -version. */
-bool version_flag;
-
/* Print various extra warnings. -W/-Wextra. */
bool extra_warnings;
-/* Don't print warning messages. -w. */
-bool inhibit_warnings;
-
-/* Treat warnings as errors. -Werror. */
-bool warnings_are_errors;
-
-/* Warn if a function returns an aggregate, since there are often
- incompatible calling conventions for doing this. */
-bool warn_aggregate_return;
-
-/* Nonzero means warn about pointer casts that increase the required
- alignment of the target type (and might therefore lead to a crash
- due to a misaligned access). */
-bool warn_cast_align;
-
-/* Nonzero means warn about uses of __attribute__((deprecated))
- declarations. */
-bool warn_deprecated_decl = true;
-
-/* Warn when an optimization pass is disabled. */
-bool warn_disabled_optimization;
-
-/* Nonzero means warn if inline function is too large. */
-bool warn_inline;
-
/* True to warn about any objects definitions whose size is larger
than N bytes. Also want about function definitions whose returned
values are larger than N bytes, where N is `larger_than_size'. */
bool warn_larger_than;
HOST_WIDE_INT larger_than_size;
-/* Warn about functions which might be candidates for attribute noreturn. */
-bool warn_missing_noreturn;
+/* Nonzero means warn about constructs which might not be
+ strict-aliasing safe. */
+int warn_strict_aliasing;
-/* True to warn about code which is never reached. */
-bool warn_notreached;
+/* Hack for cooperation between set_Wunused and set_Wextra. */
+static bool maybe_warn_unused_parameter;
-/* Warn if packed attribute on struct is unnecessary and inefficient. */
-bool warn_packed;
+/* Type(s) of debugging information we are producing (if any). See
+ flags.h for the definitions of the different possible types of
+ debugging information. */
+enum debug_info_type write_symbols = NO_DEBUG;
-/* Warn when gcc pads a structure to an alignment boundary. */
-bool warn_padded;
+/* Level of debugging information we are producing. See flags.h for
+ the definitions of the different possible levels. */
+enum debug_info_level debug_info_level = DINFO_LEVEL_NONE;
-/* True means warn about all declarations which shadow others. */
-bool warn_shadow;
+/* 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. */
+bool use_gnu_debug_info_extensions;
-/* Nonzero means warn about constructs which might not be
- strict-aliasing safe. */
-bool warn_strict_aliasing;
+/* The default visibility for all symbols (unless overridden) */
+enum symbol_visibility default_visibility = VISIBILITY_DEFAULT;
-/* True to warn if a switch on an enum, that does not have a default
- case, fails to have a case for every enum value. */
-bool warn_switch;
+/* Global visibility options. */
+struct visibility_flags visibility_options;
-/* Warn if a switch does not have a default case. */
-bool warn_switch_default;
+/* Columns of --help display. */
+static unsigned int columns = 80;
-/* Warn if a switch on an enum fails to have a case for every enum
- value (regardless of the presence or otherwise of a default case). */
-bool warn_switch_enum;
+/* What to print when a switch has no documentation. */
+static const char undocumented_msg[] = N_("This switch lacks documentation");
-/* Don't suppress warnings from system headers. -Wsystem-headers. */
-bool warn_system_headers;
+/* Used for bookkeeping on whether user set these flags so
+ -fprofile-use/-fprofile-generate does not use them. */
+static bool profile_arc_flag_set, flag_profile_values_set;
+static bool flag_unroll_loops_set, flag_tracer_set;
+static bool flag_value_profile_transformations_set;
+bool flag_speculative_prefetching_set;
+static bool flag_peel_loops_set, flag_branch_probabilities_set;
-/* True to warn about variables used before they are initialized. */
-int warn_uninitialized;
-
-/* True to warn about unused variables, functions et.al. */
-bool warn_unused_function;
-bool warn_unused_label;
-bool warn_unused_parameter;
-bool warn_unused_variable;
-bool warn_unused_value;
-
-/* Hack for cooperation between set_Wunused and set_Wextra. */
-static bool maybe_warn_unused_parameter;
+/* 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);
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_help (void);
+static void print_param_help (void);
+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
{
md = (mn + mx) / 2;
opt_len = cl_options[md].opt_len;
- comp = strncmp (input, cl_options[md].opt_text, opt_len);
+ comp = strncmp (input, cl_options[md].opt_text + 1, opt_len);
if (comp < 0)
mx = md;
{
const struct cl_option *opt = &cl_options[mn];
- /* Is this switch a prefix of the input? */
- if (!strncmp (input, opt->opt_text, opt->opt_len))
+ /* 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, and the match is exact or the switch
- takes a joined argument, return it. */
- if ((opt->flags & lang_mask)
- && (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
opt = argv[0];
- /* Drop the "no-" from negative switches. */
- if ((opt[1] == 'W' || opt[1] == 'f')
+ opt_index = find_opt (opt + 1, lang_mask | CL_COMMON | CL_TARGET);
+ if (opt_index == cl_options_count
+ && (opt[1] == 'W' || opt[1] == 'f' || opt[1] == 'm')
&& opt[2] == 'n' && opt[3] == 'o' && opt[4] == '-')
{
+ /* Drop the "no-" from negative switches. */
size_t len = strlen (opt) - 3;
dup = xmalloc (len + 1);
memcpy (dup + 2, opt + 5, len - 2 + 1);
opt = dup;
value = 0;
+ opt_index = find_opt (opt + 1, lang_mask | CL_COMMON | CL_TARGET);
}
- opt_index = find_opt (opt + 1, lang_mask | CL_COMMON);
if (opt_index == cl_options_count)
goto done;
/* Now we've swallowed any potential argument, complain if this
is a switch for a different front end. */
- if (!(option->flags & (lang_mask | CL_COMMON)))
+ if (!(option->flags & (lang_mask | CL_COMMON | CL_TARGET)))
{
complain_wrong_lang (argv[0], option, lang_mask);
goto done;
if (arg == NULL && (option->flags & (CL_JOINED | CL_SEPARATE)))
{
- if (!(*lang_hooks.missing_argument) (opt, opt_index))
+ if (!lang_hooks.missing_argument (opt, opt_index))
error ("missing argument to \"%s\"", opt);
goto done;
}
value = integral_argument (arg);
if (value == -1)
{
- error ("argument to \"-%s\" should be a non-negative integer",
+ error ("argument to \"%s\" should be a non-negative integer",
option->opt_text);
goto done;
}
}
+ if (option->flag_var)
+ switch (option->var_cond)
+ {
+ case CLVC_BOOLEAN:
+ *option->flag_var = value;
+ break;
+
+ case CLVC_EQUAL:
+ *option->flag_var = value ? option->var_value : !option->var_value;
+ break;
+
+ case CLVC_BIT_CLEAR:
+ case CLVC_BIT_SET:
+ if ((value != 0) == (option->var_cond == CLVC_BIT_SET))
+ *option->flag_var |= option->var_value;
+ else
+ *option->flag_var &= ~option->var_value;
+ if (option->flag_var == &target_flags)
+ target_flags_explicit |= option->var_value;
+ break;
+ }
+
if (option->flags & lang_mask)
- if ((*lang_hooks.handle_option) (opt_index, arg, value) == 0)
+ if (lang_hooks.handle_option (opt_index, arg, value) == 0)
result = 0;
if (result && (option->flags & CL_COMMON))
if (common_handle_option (opt_index, arg, value) == 0)
result = 0;
+ if (result && (option->flags & CL_TARGET))
+ if (!targetm.handle_option (opt_index, arg, value))
+ result = 0;
+
done:
if (dup)
free (dup);
return result;
}
+/* Handle FILENAME from the command line. */
+static void
+add_input_filename (const char *filename)
+{
+ num_in_fnames++;
+ in_fnames = xrealloc (in_fnames, num_in_fnames * sizeof (in_fnames[0]));
+ in_fnames[num_in_fnames - 1] = filename;
+}
+
/* Decode and handle the vector of command line options. LANG_MASK
contains has a single bit set representing the current
language. */
/* Interpret "-" or a non-switch as a file name. */
if (opt[0] != '-' || opt[1] == '\0')
{
- main_input_filename = opt;
- (*lang_hooks.handle_filename) (opt);
+ if (main_input_filename == NULL)
+ main_input_filename = opt;
+ add_input_filename (opt);
n = 1;
continue;
}
unsigned int i, lang_mask;
/* Perform language-specific options initialization. */
- lang_mask = (*lang_hooks.init_options) (argc, argv);
+ lang_mask = lang_hooks.init_options (argc, argv);
+
+ lang_hooks.initialize_diagnostics (global_dc);
/* Scan to see what optimization level has been specified. That will
determine the default value of many flags. */
if (optimize >= 1)
{
flag_defer_pop = 1;
- flag_thread_jumps = 1;
#ifdef DELAY_SLOTS
flag_delayed_branch = 1;
#endif
flag_guess_branch_prob = 1;
flag_cprop_registers = 1;
flag_loop_optimize = 1;
- flag_crossjumping = 1;
flag_if_conversion = 1;
flag_if_conversion2 = 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;
+ flag_tree_sink = 1;
+ flag_tree_salias = 1;
+
+ if (!optimize_size)
+ {
+ /* Loop header copying usually increases size of the code. This used
+ not to be true, since quite often it is possible to verify that
+ the condition is satisfied in the first iteration and therefore
+ to eliminate it. Jump threading handles these cases now. */
+ flag_tree_ch = 1;
+ }
}
if (optimize >= 2)
{
+ flag_thread_jumps = 1;
+ flag_crossjumping = 1;
flag_optimize_sibling_calls = 1;
flag_cse_follow_jumps = 1;
flag_cse_skip_blocks = 1;
flag_delete_null_pointer_checks = 1;
flag_reorder_blocks = 1;
flag_reorder_functions = 1;
+ flag_unit_at_a_time = 1;
+
+ if (!optimize_size)
+ {
+ /* PRE tends to generate bigger code. */
+ flag_tree_pre = 1;
+ }
}
if (optimize >= 3)
{
flag_inline_functions = 1;
- flag_rename_registers = 1;
flag_unswitch_loops = 1;
- flag_unit_at_a_time = 1;
+ flag_gcse_after_reload = 1;
}
if (optimize < 2 || optimize_size)
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;
-#ifdef DEFAULT_SHORT_ENUMS
- /* Initialize how much space enums occupy, by default. */
- flag_short_enums = DEFAULT_SHORT_ENUMS;
-#endif
+ /* 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 = 0;
+ target_flags = targetm.default_target_flags;
set_target_switch ("");
- /* Unwind tables are always present in an ABI-conformant IA-64
- object file, so the default should be ON. */
-#ifdef IA64_UNWIND_INFO
- flag_unwind_tables = IA64_UNWIND_INFO;
+ /* Unwind tables are always present when a target has ABI-specified unwind
+ tables, so the default should be ON. */
+#ifdef TARGET_UNWIND_INFO
+ flag_unwind_tables = TARGET_UNWIND_INFO;
#endif
#ifdef OPTIMIZATION_OPTIONS
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. If flag_exceptions is turned on we need to
+ turn off the partitioning optimization. */
+
+ if (flag_exceptions && flag_reorder_blocks_and_partition)
+ {
+ warning
+ ("-freorder-blocks-and-partition does not work with exceptions");
+ flag_reorder_blocks_and_partition = 0;
+ flag_reorder_blocks = 1;
+ }
+
+ /* The optimization to partition hot and cold basic blocks into
+ separate sections of the .o and executable files does not currently
+ work correctly with DWARF debugging turned on. Until this is fixed
+ we will disable the optimization when DWARF debugging is set. */
+
+ if (flag_reorder_blocks_and_partition && write_symbols == DWARF2_DEBUG)
+ {
+ warning
+ ("-freorder-blocks-and-partition does not work with -g (currently)");
+ flag_reorder_blocks_and_partition = 0;
+ flag_reorder_blocks = 1;
+ }
}
/* Handle target- and language-independent options. Return zero to
- generate an "unknown option" message. */
+ 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 ATTRIBUTE_UNUSED)
+common_handle_option (size_t scode, const char *arg, int value)
{
enum opt_code code = (enum opt_code) scode;
switch (code)
{
- default:
- abort ();
-
case OPT__help:
- display_help ();
+ print_help ();
exit_after_options = true;
break;
set_Wextra (value);
break;
- case OPT_Waggregate_return:
- warn_aggregate_return = value;
- break;
-
- case OPT_Wcast_align:
- warn_cast_align = value;
- break;
-
- case OPT_Wdeprecated_declarations:
- warn_deprecated_decl = value;
- break;
-
- case OPT_Wdisabled_optimization:
- warn_disabled_optimization = value;
- break;
-
- case OPT_Werror:
- warnings_are_errors = value;
- break;
-
case OPT_Wextra:
set_Wextra (value);
break;
- case OPT_Winline:
- warn_inline = value;
- break;
-
case OPT_Wlarger_than_:
larger_than_size = value;
warn_larger_than = value != -1;
break;
- case OPT_Wmissing_noreturn:
- warn_missing_noreturn = value;
- break;
-
- case OPT_Wpacked:
- warn_packed = value;
- break;
-
- case OPT_Wpadded:
- warn_padded = value;
- break;
-
- case OPT_Wshadow:
- warn_shadow = value;
- break;
-
case OPT_Wstrict_aliasing:
+ case OPT_Wstrict_aliasing_:
warn_strict_aliasing = value;
break;
- case OPT_Wswitch:
- warn_switch = value;
- break;
-
- case OPT_Wswitch_default:
- warn_switch_default = value;
- break;
-
- case OPT_Wswitch_enum:
- warn_switch_enum = value;
- break;
-
- case OPT_Wsystem_headers:
- warn_system_headers = value;
- break;
-
- case OPT_Wuninitialized:
- warn_uninitialized = value;
- break;
-
- case OPT_Wunreachable_code:
- warn_notreached = value;
- break;
-
case OPT_Wunused:
set_Wunused (value);
break;
- case OPT_Wunused_function:
- warn_unused_function = value;
- break;
-
- case OPT_Wunused_label:
- warn_unused_label = value;
- break;
-
- case OPT_Wunused_parameter:
- warn_unused_parameter = value;
- break;
-
- case OPT_Wunused_value:
- warn_unused_value = value;
- break;
-
- case OPT_Wunused_variable:
- warn_unused_variable = value;
- break;
-
case OPT_aux_info:
case OPT_aux_info_:
aux_info_file_name = arg;
dump_base_name = arg;
break;
- case OPT_fPIC:
- flag_pic = value + value;
- break;
-
- case OPT_fPIE:
- flag_pie = value + value;
- break;
-
- case OPT_falign_functions:
case OPT_falign_functions_:
- align_functions = !value;
+ align_functions = value;
break;
- case OPT_falign_jumps:
case OPT_falign_jumps_:
- align_jumps = !value;
+ align_jumps = value;
break;
- case OPT_falign_labels:
case OPT_falign_labels_:
- align_labels = !value;
+ align_labels = value;
break;
- case OPT_falign_loops:
case OPT_falign_loops_:
- align_loops = !value;
- break;
-
- case OPT_fargument_alias:
- flag_argument_noalias = !value;
- break;
-
- case OPT_fargument_noalias:
- flag_argument_noalias = value;
- break;
-
- case OPT_fargument_noalias_global:
- flag_argument_noalias = value + value;
- break;
-
- case OPT_fasynchronous_unwind_tables:
- flag_asynchronous_unwind_tables = value;
- break;
-
- case OPT_fbounds_check:
- flag_bounds_check = value;
- break;
-
- case OPT_fbranch_count_reg:
- flag_branch_on_count_reg = value;
+ align_loops = value;
break;
case OPT_fbranch_probabilities:
- flag_branch_probabilities = value;
- break;
-
- case OPT_fbranch_target_load_optimize:
- flag_branch_target_load_optimize = value;
- break;
-
- case OPT_fbranch_target_load_optimize2:
- flag_branch_target_load_optimize2 = value;
+ flag_branch_probabilities_set = true;
break;
case OPT_fcall_used_:
fix_register (arg, 0, 0);
break;
- case OPT_fcaller_saves:
- flag_caller_saves = value;
- break;
-
- case OPT_fcommon:
- flag_no_common = !value;
- break;
-
- case OPT_fcprop_registers:
- flag_cprop_registers = value;
- break;
-
- case OPT_fcrossjumping:
- flag_crossjumping = value;
- break;
-
- case OPT_fcse_follow_jumps:
- flag_cse_follow_jumps = value;
- break;
-
- case OPT_fcse_skip_blocks:
- flag_cse_skip_blocks = value;
- break;
-
- case OPT_fdata_sections:
- flag_data_sections = value;
- break;
-
- case OPT_fdefer_pop:
- flag_defer_pop = value;
- break;
-
- case OPT_fdelayed_branch:
- flag_delayed_branch = value;
- break;
-
- case OPT_fdelete_null_pointer_checks:
- flag_delete_null_pointer_checks = value;
- break;
-
case OPT_fdiagnostics_show_location_:
if (!strcmp (arg, "once"))
diagnostic_prefixing_rule (global_dc) = DIAGNOSTICS_SHOW_PREFIX_ONCE;
return 0;
break;
- case OPT_fdump_unnumbered:
- flag_dump_unnumbered = value;
- break;
-
- case OPT_feliminate_dwarf2_dups:
- flag_eliminate_dwarf2_dups = value;
- break;
-
- case OPT_feliminate_unused_debug_types:
- flag_eliminate_unused_debug_types = value;
- break;
-
- case OPT_feliminate_unused_debug_symbols:
- flag_debug_only_used_symbols = value;
- break;
-
- case OPT_fexceptions:
- flag_exceptions = value;
- break;
-
- case OPT_fexpensive_optimizations:
- flag_expensive_optimizations = value;
+ case OPT_fdump_:
+ if (!dump_switch_p (arg))
+ return 0;
break;
case OPT_ffast_math:
set_fast_math_flags (value);
break;
- case OPT_ffinite_math_only:
- flag_finite_math_only = value;
- break;
-
case OPT_ffixed_:
fix_register (arg, 1, 1);
break;
- case OPT_ffunction_cse:
- flag_no_function_cse = !value;
- break;
-
- case OPT_ffloat_store:
- flag_float_store = value;
- break;
-
- case OPT_fforce_addr:
- flag_force_addr = value;
- break;
-
- case OPT_fforce_mem:
- flag_force_mem = value;
- break;
-
- case OPT_ffunction_sections:
- flag_function_sections = value;
- break;
-
- case OPT_fgcse:
- flag_gcse = value;
- break;
-
- case OPT_fgcse_lm:
- flag_gcse_lm = value;
- break;
-
- case OPT_fgcse_sm:
- flag_gcse_sm = value;
- break;
-
- case OPT_fgnu_linker:
- flag_gnu_linker = value;
- break;
-
- case OPT_fguess_branch_probability:
- flag_guess_branch_prob = value;
- break;
-
- case OPT_fident:
- flag_no_ident = !value;
- break;
-
- case OPT_fif_conversion:
- flag_if_conversion = value;
- break;
-
- case OPT_fif_conversion2:
- flag_if_conversion2 = value;
- break;
-
- case OPT_finhibit_size_directive:
- flag_inhibit_size_directive = value;
- break;
-
- case OPT_finline:
- flag_no_inline = !value;
- break;
-
- case OPT_finline_functions:
- flag_inline_functions = value;
- break;
-
case OPT_finline_limit_:
case OPT_finline_limit_eq:
- set_param_value ("max-inline-insns", value);
set_param_value ("max-inline-insns-single", value / 2);
set_param_value ("max-inline-insns-auto", value / 2);
- set_param_value ("max-inline-insns-rtl", value);
- if (value / 4 < MIN_INLINE_INSNS)
- {
- if (value / 4 > 10)
- set_param_value ("min-inline-insns", value / 4);
- else
- set_param_value ("min-inline-insns", 10);
- }
- break;
-
- case OPT_finstrument_functions:
- flag_instrument_function_entry_exit = value;
- break;
-
- case OPT_fkeep_inline_functions:
- flag_keep_inline_functions =value;
- break;
-
- case OPT_fkeep_static_consts:
- flag_keep_static_consts = value;
- break;
-
- case OPT_fleading_underscore:
- flag_leading_underscore = value;
- break;
-
- case OPT_floop_optimize:
- flag_loop_optimize = value;
- break;
-
- case OPT_fmath_errno:
- flag_errno_math = value;
- break;
-
- case OPT_fmem_report:
- mem_report = value;
- break;
-
- case OPT_fmerge_all_constants:
- flag_merge_constants = value + value;
- break;
-
- case OPT_fmerge_constants:
- flag_merge_constants = value;
break;
case OPT_fmessage_length_:
- output_set_maximum_length (&global_dc->buffer, value);
- break;
-
- case OPT_fmove_all_movables:
- flag_move_all_movables = value;
- break;
-
- case OPT_fnew_ra:
- flag_new_regalloc = value;
- break;
-
- case OPT_fnon_call_exceptions:
- flag_non_call_exceptions = value;
- break;
-
- case OPT_fold_unroll_all_loops:
- flag_old_unroll_all_loops = value;
- break;
-
- case OPT_fold_unroll_loops:
- flag_old_unroll_loops = value;
+ pp_set_line_maximum_length (global_dc->printer, value);
break;
- case OPT_fomit_frame_pointer:
- flag_omit_frame_pointer = value;
- break;
-
- case OPT_foptimize_register_move:
- flag_regmove = value;
- break;
-
- case OPT_foptimize_sibling_calls:
- flag_optimize_sibling_calls = value;
- break;
-
- case OPT_fpack_struct:
- flag_pack_struct = value;
+ 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 = value;
- break;
-
- case OPT_fpcc_struct_return:
- flag_pcc_struct_return = value;
+ flag_peel_loops_set = true;
break;
- case OPT_fpeephole:
- flag_no_peephole = !value;
- break;
-
- case OPT_fpeephole2:
- flag_peephole2 = value;
+ 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;
+#ifdef HAVE_prefetch
+ if (0 && !flag_speculative_prefetching_set)
+ flag_speculative_prefetching = value;
+#endif
break;
- case OPT_fpic:
- flag_pic = value;
+ 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;
+ if (!flag_unroll_loops_set)
+ flag_unroll_loops = value;
+#ifdef HAVE_prefetch
+ if (0 && !flag_speculative_prefetching_set)
+ flag_speculative_prefetching = value;
+#endif
break;
- case OPT_fpie:
- flag_pie = value;
+ case OPT_fprofile_values:
+ flag_profile_values_set = true;
break;
- case OPT_fprefetch_loop_arrays:
- flag_prefetch_loop_arrays = value;
+ 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 ("unrecognised visibility value \"%s\"", arg);
+ }
break;
- case OPT_fprofile:
- profile_flag = value;
+ case OPT_fvpt:
+ flag_value_profile_transformations_set = true;
break;
- case OPT_fprofile_arcs:
- profile_arc_flag = value;
+ case OPT_fspeculative_prefetching:
+ flag_speculative_prefetching_set = true;
break;
case OPT_frandom_seed:
flag_random_seed = arg;
break;
- case OPT_freduce_all_givs:
- flag_reduce_all_givs = value;
- break;
-
- case OPT_freg_struct_return:
- flag_pcc_struct_return = !value;
- break;
-
- case OPT_fregmove:
- flag_regmove = value;
- break;
-
- case OPT_frename_registers:
- flag_rename_registers = value;
- break;
-
- case OPT_freorder_blocks:
- flag_reorder_blocks = value;
- break;
-
- case OPT_freorder_functions:
- flag_reorder_functions = value;
- break;
-
- case OPT_frerun_cse_after_loop:
- flag_rerun_cse_after_loop = value;
- break;
-
- case OPT_frerun_loop_opt:
- flag_rerun_loop_opt = value;
- break;
-
- case OPT_fsched_interblock:
- flag_schedule_interblock= value;
- break;
-
- case OPT_fsched_spec:
- flag_schedule_speculative = value;
- break;
-
- case OPT_fsched_spec_load:
- flag_schedule_speculative_load = value;
- break;
-
- case OPT_fsched_spec_load_dangerous:
- flag_schedule_speculative_load_dangerous = value;
- break;
-
case OPT_fsched_verbose_:
#ifdef INSN_SCHEDULING
fix_sched_param ("verbose", arg);
return 0;
#endif
- case OPT_fsched2_use_superblocks:
- flag_sched2_use_superblocks = value;
- break;
-
- case OPT_fsched2_use_traces:
- flag_sched2_use_traces = value;
- break;
-
- case OPT_fschedule_insns:
- flag_schedule_insns = value;
- break;
-
- case OPT_fschedule_insns2:
- flag_schedule_insns_after_reload = value;
- break;
-
- case OPT_fshared_data:
- flag_shared_data = value;
- break;
-
- case OPT_fsignaling_nans:
- flag_signaling_nans = value;
- break;
-
- case OPT_fsingle_precision_constant:
- flag_single_precision_constant = value;
- break;
-
- case OPT_fssa:
- flag_ssa = value;
- break;
-
- case OPT_fssa_ccp:
- flag_ssa_ccp = value;
- break;
-
- case OPT_fssa_dce:
- flag_ssa_dce = value;
+ case OPT_fsched_stalled_insns_:
+ flag_sched_stalled_insns = value;
+ if (flag_sched_stalled_insns == 0)
+ flag_sched_stalled_insns = -1;
break;
- case OPT_fstack_check:
- flag_stack_check = value;
+ case OPT_fsched_stalled_insns_dep_:
+ flag_sched_stalled_insns_dep = value;
break;
case OPT_fstack_limit:
stack_limit_rtx = gen_rtx_SYMBOL_REF (Pmode, ggc_strdup (arg));
break;
- case OPT_fstrength_reduce:
- flag_strength_reduce = value;
- break;
-
- case OPT_fstrict_aliasing:
- flag_strict_aliasing = value;
- break;
-
- case OPT_fsyntax_only:
- flag_syntax_only = value;
- break;
-
- case OPT_ftest_coverage:
- flag_test_coverage = value;
- break;
-
- case OPT_fthread_jumps:
- flag_thread_jumps = value;
- break;
-
- case OPT_ftime_report:
- time_report = value;
+ case OPT_ftree_vectorizer_verbose_:
+ vect_set_verbosity_level (arg);
break;
case OPT_ftls_model_:
break;
case OPT_ftracer:
- flag_tracer = value;
- break;
-
- case OPT_ftrapping_math:
- flag_trapping_math = value;
- break;
-
- case OPT_ftrapv:
- flag_trapv = value;
- break;
-
- case OPT_funit_at_a_time:
- flag_unit_at_a_time = value;
- break;
-
- case OPT_funroll_all_loops:
- flag_unroll_all_loops = value;
+ flag_tracer_set = true;
break;
case OPT_funroll_loops:
- flag_unroll_loops = value;
+ flag_unroll_loops_set = true;
break;
- case OPT_funsafe_math_optimizations:
- flag_unsafe_math_optimizations = value;
+ case OPT_g:
+ set_debug_level (NO_DEBUG, DEFAULT_GDB_EXTENSIONS, arg);
break;
- case OPT_funswitch_loops:
- flag_unswitch_loops = value;
+ case OPT_gcoff:
+ set_debug_level (SDB_DEBUG, false, arg);
break;
- case OPT_funwind_tables:
- flag_unwind_tables = value;
+ case OPT_gdwarf_2:
+ set_debug_level (DWARF2_DEBUG, false, arg);
break;
- case OPT_fverbose_asm:
- flag_verbose_asm = value;
- break;
-
- case OPT_fwrapv:
- flag_wrapv = value;
+ case OPT_ggdb:
+ set_debug_level (NO_DEBUG, 2, arg);
break;
- case OPT_fwritable_strings:
- flag_writable_strings = value;
+ case OPT_gstabs:
+ case OPT_gstabs_:
+ set_debug_level (DBX_DEBUG, code == OPT_gstabs_, arg);
break;
- case OPT_fzero_initialized_in_bss:
- flag_zero_initialized_in_bss = value;
+ case OPT_gvms:
+ set_debug_level (VMS_DEBUG, false, arg);
break;
- case OPT_g:
- decode_g_option (arg);
+ case OPT_gxcoff:
+ case OPT_gxcoff_:
+ set_debug_level (XCOFF_DEBUG, code == OPT_gxcoff_, arg);
break;
case OPT_m:
asm_file_name = arg;
break;
- case OPT_p:
- profile_flag = 1;
- break;
-
- case OPT_pedantic:
- pedantic = 1;
- break;
-
case OPT_pedantic_errors:
flag_pedantic_errors = pedantic = 1;
break;
- case OPT_quiet:
- quiet_flag = 1;
- break;
-
- case OPT_version:
- version_flag = 1;
- break;
+ default:
+ /* If the flag was handled in a standard way, assume the lack of
+ processing here is intentional. */
+ if (cl_options[scode].flag_var)
+ break;
- case OPT_w:
- inhibit_warnings = true;
- break;
+ abort ();
}
return 1;
{
value = integral_argument (equal + 1);
if (value == -1)
- error ("invalid --param value `%s'", equal + 1);
+ error ("invalid --param value %qs", equal + 1);
else
{
*equal = '\0';
flag_finite_math_only = set;
flag_errno_math = !set;
if (set)
- flag_signaling_nans = 0;
+ {
+ flag_signaling_nans = 0;
+ flag_rounding_math = 0;
+ flag_cx_limited_range = 1;
+ }
}
/* Return true iff flags are set as if -ffast-math. */
&& 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 ("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);
+ }
+}
+
+/* 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);
+ }
+
+ display_target_options ();
+}
+
+/* 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. */
+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 (const struct cl_option *option)
+{
+ if (option->flag_var)
+ switch (option->var_cond)
+ {
+ case CLVC_BOOLEAN:
+ return *option->flag_var != 0;
+
+ case CLVC_EQUAL:
+ return *option->flag_var == option->var_value;
+
+ case CLVC_BIT_CLEAR:
+ return (*option->flag_var & option->var_value) == 0;
+
+ case CLVC_BIT_SET:
+ return (*option->flag_var & option->var_value) != 0;
+ }
+ return -1;
+}
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