/* Command line option handling.
- Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
+ Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
Free Software Foundation, Inc.
Contributed by Neil Booth.
#include "dbgcnt.h"
#include "debug.h"
#include "plugin.h"
+#include "except.h"
+#include "lto-streamer.h"
/* Value of the -G xx switch, and whether it was passed or not. */
unsigned HOST_WIDE_INT g_switch_value;
static VEC(const_char_p,heap) *ignored_options;
+/* Language specific warning pass for unused results. */
+bool flag_warn_unused_result = false;
+
/* Input file names. */
const char **in_fnames;
unsigned num_in_fnames;
{
char *ok_langs, *bad_lang;
+ /* The LTO front end inherits all the options from the first front
+ end that was used. However, not all the original front end
+ options make sense in LTO.
+
+ A real solution would be to filter this in collect2, but collect2
+ does not have access to all the option attributes to know what to
+ filter. So, in lto1 we silently accept inherited flags and do
+ nothing about it. */
+ if (lang_mask & CL_LTO)
+ return;
+
ok_langs = write_langs (option->flags);
bad_lang = write_langs (lang_mask);
}
if (option->flag_var)
- switch (option->var_type)
- {
- case CLVC_BOOLEAN:
- *(int *) option->flag_var = value;
- break;
-
- case CLVC_EQUAL:
- *(int *) option->flag_var = (value
- ? option->var_value
- : !option->var_value);
- break;
-
- case CLVC_BIT_CLEAR:
- case CLVC_BIT_SET:
- if ((value != 0) == (option->var_type == CLVC_BIT_SET))
- *(int *) option->flag_var |= option->var_value;
- else
- *(int *) option->flag_var &= ~option->var_value;
- if (option->flag_var == &target_flags)
- target_flags_explicit |= option->var_value;
- break;
-
- case CLVC_STRING:
- *(const char **) option->flag_var = arg;
- break;
- }
+ set_option (option, value, arg);
if (option->flags & lang_mask)
- if (lang_hooks.handle_option (opt_index, arg, value) == 0)
- result = 0;
+ {
+ if (lang_hooks.handle_option (opt_index, arg, value) == 0)
+ result = 0;
+ else
+ lto_register_user_option (opt_index, arg, value, lang_mask);
+ }
if (result && (option->flags & CL_COMMON))
- if (common_handle_option (opt_index, arg, value, lang_mask) == 0)
- result = 0;
+ {
+ if (common_handle_option (opt_index, arg, value, lang_mask) == 0)
+ result = 0;
+ else
+ lto_register_user_option (opt_index, arg, value, CL_COMMON);
+ }
if (result && (option->flags & CL_TARGET))
- if (!targetm.handle_option (opt_index, arg, value))
- result = 0;
+ {
+ if (!targetm.handle_option (opt_index, arg, value))
+ result = 0;
+ else
+ lto_register_user_option (opt_index, arg, value, CL_TARGET);
+ }
done:
if (dup)
if (optimize_val != -1)
{
optimize = optimize_val;
+ if ((unsigned int) optimize > 255)
+ optimize = 255;
optimize_size = 0;
}
}
}
}
-
+
/* Use priority coloring if cover classes is not defined for the
target. */
if (targetm.ira_cover_classes == NULL)
flag_if_conversion2 = opt1;
flag_ipa_pure_const = opt1;
flag_ipa_reference = opt1;
+ flag_ipa_profile = opt1;
flag_merge_constants = opt1;
flag_split_wide_types = opt1;
flag_tree_ccp = opt1;
flag_caller_saves = opt2;
flag_peephole2 = opt2;
#ifdef INSN_SCHEDULING
- flag_schedule_insns = opt2;
+ /* Only run the pre-regalloc scheduling pass if optimizing for speed. */
+ flag_schedule_insns = opt2 && ! optimize_size;
flag_schedule_insns_after_reload = opt2;
#endif
flag_regmove = opt2;
flag_tree_vrp = opt2;
flag_tree_builtin_call_dce = opt2;
flag_tree_pre = opt2;
- flag_tree_switch_conversion = 1;
+ flag_tree_switch_conversion = opt2;
flag_ipa_cp = opt2;
+ flag_ipa_sra = opt2;
/* Track fields in field-sensitive alias analysis. */
set_param_value ("max-fields-for-field-sensitive",
flag_unwind_tables = targetm.unwind_tables_default;
}
+ /* Clear any options currently held for LTO. */
+ lto_clear_user_options ();
+
#ifdef OPTIMIZATION_OPTIONS
/* Allow default optimizations to be specified on a per-machine basis. */
OPTIMIZATION_OPTIONS (optimize, optimize_size);
handle_options (argc, argv, lang_mask);
- /* Make DUMP_BASE_NAME relative to the AUX_BASE_NAME directory,
- typically the directory to contain the object file. */
- if (aux_base_name && ! IS_ABSOLUTE_PATH (dump_base_name))
+ if (dump_base_name && ! IS_ABSOLUTE_PATH (dump_base_name))
{
- const char *aux_base;
-
- base_of_path (aux_base_name, &aux_base);
- if (aux_base_name != aux_base)
+ /* First try to make DUMP_BASE_NAME relative to the DUMP_DIR_NAME
+ directory. Then try to make DUMP_BASE_NAME relative to the
+ AUX_BASE_NAME directory, typically the directory to contain
+ the object file. */
+ if (dump_dir_name)
+ dump_base_name = concat (dump_dir_name, dump_base_name, NULL);
+ else if (aux_base_name)
{
- int dir_len = aux_base - aux_base_name;
- char *new_dump_base_name =
- XNEWVEC (char, strlen(dump_base_name) + dir_len + 1);
-
- /* Copy directory component from AUX_BASE_NAME. */
- memcpy (new_dump_base_name, aux_base_name, dir_len);
- /* Append existing DUMP_BASE_NAME. */
- strcpy (new_dump_base_name + dir_len, dump_base_name);
- dump_base_name = new_dump_base_name;
+ const char *aux_base;
+
+ base_of_path (aux_base_name, &aux_base);
+ if (aux_base_name != aux_base)
+ {
+ int dir_len = aux_base - aux_base_name;
+ char *new_dump_base_name =
+ XNEWVEC (char, strlen(dump_base_name) + dir_len + 1);
+
+ /* Copy directory component from AUX_BASE_NAME. */
+ memcpy (new_dump_base_name, aux_base_name, dir_len);
+ /* Append existing DUMP_BASE_NAME. */
+ strcpy (new_dump_base_name + dir_len, dump_base_name);
+ dump_base_name = new_dump_base_name;
+ }
}
}
flag_pic = flag_pie;
if (flag_pic && !flag_pie)
flag_shlib = 1;
+ first_time_p = false;
}
if (optimize == 0)
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)
+ if (flag_exceptions && flag_reorder_blocks_and_partition
+ && (USING_SJLJ_EXCEPTIONS
+#ifdef TARGET_UNWIND_INFO
+ || 1
+#endif
+ ))
{
- inform (input_location,
- "-freorder-blocks-and-partition does not work with exceptions");
+ inform (input_location,
+ "-freorder-blocks-and-partition does not work with exceptions on this architecture");
flag_reorder_blocks_and_partition = 0;
flag_reorder_blocks = 1;
}
optimization. */
if (flag_unwind_tables && ! targetm.unwind_tables_default
- && flag_reorder_blocks_and_partition)
+ && flag_reorder_blocks_and_partition
+ && (USING_SJLJ_EXCEPTIONS
+#ifdef TARGET_UNWIND_INFO
+ || 1
+#endif
+ ))
{
- inform (input_location, "-freorder-blocks-and-partition does not support unwind info");
+ inform (input_location,
+ "-freorder-blocks-and-partition does not support unwind info on this architecture");
flag_reorder_blocks_and_partition = 0;
flag_reorder_blocks = 1;
}
if (flag_reorder_blocks_and_partition
&& (!targetm.have_named_sections
- || (flag_unwind_tables && targetm.unwind_tables_default)))
+ || (flag_unwind_tables && targetm.unwind_tables_default
+ && (USING_SJLJ_EXCEPTIONS
+#ifdef TARGET_UNWIND_INFO
+ || 1
+#endif
+ ))))
{
inform (input_location,
"-freorder-blocks-and-partition does not work on this architecture");
flag_ira_algorithm = IRA_ALGORITHM_PRIORITY;
}
- /* Save the current optimization options if this is the first call. */
- if (first_time_p)
- {
- optimization_default_node = build_optimization_node ();
- optimization_current_node = optimization_default_node;
- first_time_p = false;
- }
if (flag_conserve_stack)
{
if (!PARAM_SET_P (PARAM_LARGE_STACK_FRAME))
if (!PARAM_SET_P (PARAM_STACK_FRAME_GROWTH))
PARAM_VALUE (PARAM_STACK_FRAME_GROWTH) = 40;
}
+ if (flag_wpa || flag_ltrans)
+ {
+ /* These passes are not WHOPR compatible yet. */
+ flag_ipa_cp = 0;
+ flag_ipa_reference = 0;
+ flag_ipa_type_escape = 0;
+ flag_ipa_pta = 0;
+ flag_ipa_struct_reorg = 0;
+ }
+ if (flag_lto || flag_whopr)
+ {
+#ifdef ENABLE_LTO
+ flag_generate_lto = 1;
+
+ /* When generating IL, do not operate in whole-program mode.
+ Otherwise, symbols will be privatized too early, causing link
+ errors later. */
+ flag_whole_program = 0;
+#else
+ error ("LTO support has not been enabled in this configuration");
+#endif
+ }
+
+ /* Reconcile -flto and -fwhopr. Set additional flags as appropriate and
+ check option consistency. */
+ if (flag_lto && flag_whopr)
+ error ("-flto and -fwhopr are mutually exclusive");
}
#define LEFT_COLUMN 27
printf (_(" None found. Use --help=%s to show *all* the options supported by the %s front-end\n"),
lang_names[i], lang_names[i]);
}
-
+
}
else if (! displayed)
printf (_(" All options with the desired characteristics have already been displayed\n"));
{ NULL, 0 }
};
unsigned int * pflags;
- char * comma;
+ const char * comma;
unsigned int lang_flag, specific_flag;
unsigned int len;
unsigned int i;
break;
case OPT_Wlarger_than_:
- /* This form corresponds to -Wlarger-than-.
- Kept for backward compatibility.
+ /* This form corresponds to -Wlarger-than-.
+ Kept for backward compatibility.
Don't use it as the first argument of warning(). */
case OPT_Wlarger_than_eq:
dump_base_name = arg;
break;
+ case OPT_dumpdir:
+ dump_dir_name = arg;
+ break;
+
case OPT_falign_functions_:
align_functions = value;
break;
break;
case OPT_fdiagnostics_show_option:
- global_dc->show_option_requested = true;
+ global_dc->show_option_requested = value;
break;
case OPT_fdump_:
break;
case OPT_gdwarf_:
- if (value < 2 || value > 3)
+ if (value < 2 || value > 4)
error ("dwarf version %d is not supported", value);
else
dwarf_version = value;
flag_pedantic_errors = pedantic = 1;
break;
+ case OPT_fsee:
case OPT_fcse_skip_blocks:
case OPT_floop_optimize:
case OPT_frerun_loop_opt:
+ case OPT_fsched2_use_traces:
case OPT_fstrength_reduce:
case OPT_ftree_store_copy_prop:
case OPT_fforce_addr:
case OPT_ftree_salias:
case OPT_ftree_store_ccp:
+ case OPT_Wunreachable_code:
+ case OPT_fargument_alias:
+ case OPT_fargument_noalias:
+ case OPT_fargument_noalias_anything:
+ case OPT_fargument_noalias_global:
/* These are no-ops, preserved for backward compatibility. */
break;
+ case OPT_fuse_linker_plugin:
+ /* No-op. Used by the driver and passed to us because it starts with f.*/
+ break;
+
default:
/* If the flag was handled in a standard way, assume the lack of
processing here is intentional. */
free (arg);
}
-/* Used to set the level of strict aliasing warnings,
+/* 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,
}
}
-/* When -funsafe-math-optimizations is set the following
- flags are set as well. */
+/* When -funsafe-math-optimizations is set the following
+ flags are set as well. */
void
set_unsafe_math_optimizations_flags (int set)
{
return true;
}
+/* Set *OPTION according to VALUE and ARG. */
+
+void
+set_option (const struct cl_option *option, int value, const char *arg)
+{
+ if (!option->flag_var)
+ return;
+
+ switch (option->var_type)
+ {
+ case CLVC_BOOLEAN:
+ *(int *) option->flag_var = value;
+ break;
+
+ case CLVC_EQUAL:
+ *(int *) option->flag_var = (value
+ ? option->var_value
+ : !option->var_value);
+ break;
+
+ case CLVC_BIT_CLEAR:
+ case CLVC_BIT_SET:
+ if ((value != 0) == (option->var_type == CLVC_BIT_SET))
+ *(int *) option->flag_var |= option->var_value;
+ else
+ *(int *) option->flag_var &= ~option->var_value;
+ if (option->flag_var == &target_flags)
+ target_flags_explicit |= option->var_value;
+ break;
+
+ case CLVC_STRING:
+ *(const char **) option->flag_var = arg;
+ break;
+ }
+}
+
+
+/* Callback function, called when -Werror= enables a warning. */
+
+static void (*warning_as_error_callback) (int) = NULL;
+
+/* Register a callback for enable_warning_as_error calls. */
+
+void
+register_warning_as_error_callback (void (*callback) (int))
+{
+ gcc_assert (warning_as_error_callback == NULL || callback == NULL);
+ warning_as_error_callback = callback;
+}
+
/* Enable a warning option as an error. This is used by -Werror= and
also by legacy Werror-implicit-function-declaration. */
}
else
{
- diagnostic_t kind = value ? DK_ERROR : DK_WARNING;
+ const diagnostic_t 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;
+ if (kind == DK_ERROR)
+ {
+ const struct cl_option * const option = cl_options + option_index;
+
+ /* -Werror=foo implies -Wfoo. */
+ if (option->var_type == CLVC_BOOLEAN && option->flag_var)
+ *(int *) option->flag_var = 1;
+
+ if (warning_as_error_callback)
+ warning_as_error_callback (option_index);
+ }
}
free (new_option);
}
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