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Options initialization rearrangement
- From: "Joseph S. Myers" <joseph at codesourcery dot com>
- To: gcc-patches at gcc dot gnu dot org
- Cc: java-patches at gcc dot gnu dot org, fortran at gcc dot gnu dot org, bosch at gnat dot com, dewar at gnat dot com, charlet at act-europe dot fr
- Date: Thu, 7 Oct 2010 15:21:50 +0000 (UTC)
- Subject: Options initialization rearrangement
This patch (including changes to the various front ends) makes some
changes to how options-related initialization is carried out, with a
view to separating code that acts on a gcc_options structure (to be
shared with the driver, except for the front-end parts) from code with
other global effects (generally not to be shared with the driver).
The general idea is that a gcc_options structure is initialized,
updated in the course of processing options, then finalized, and other
compiler state is configured either at an early point without using
the structure, or after it is finalized. As I noted in
<http://gcc.gnu.org/ml/gcc-patches/2010-06/msg02689.html>, "target"
and "optimize" attributes ought to work using a copy of the structure
from *before* finalization in order to work reliably.
This patch makes the first steps in that general direction rather than
implementing it completely; subsequent patches will build on it.
* The static initializers for options now go in a separate
global_options_init which is copied to global_options in the
initialization step, reflecting that there will be more than one
gcc_options structure to initialize in future.
* There are explicit init_options_once, init_options_struct and
lang_hooks.init_options_struct steps, each of which has some parts
moved out from the previous functions. Thus various parts of
initialization are reordered, but this is not intended to change the
behavior of the compiler.
* The Fortran gfc_init_options hook set flag_short_enums to a
target-dependent default. This was too early to set it, since the
target-dependent default may depend on command-line options; the
default is set in language-independent code in process_options,
which should suffice for all languages, so the front-end setting is
removed. (I think that front-end setting was a relic of when
Fortran used its own short-enums flag instead of the
language-independent one.)
* Several variables that are naturally set in the structure
initialization hooks are moved into the gcc_options structure. Some
of these have enum types from flags.h. This means that options.h
always has to be included after the enum declarations in flags.h.
Most files just include flags.h and get options.h from there; some
include options.h (unnecessarily) after flags.h; those that included
options.h only were changed to include flags.h instead. Various
parts of flags.h and options.h were disabled for target libraries
because including flags.h instead of options.h in target code (via
tm.h) caused some problems there. (I'm not sure what was being used
in target code, but probably some TARGET_* macro definitions from
options.h.)
* The setting of options based on the optimization level was moved
into a new default_options_optimization function. This is simply a
convenience separation of functions; it hasn't yet been modified to
work directly on options structures so asserts that global_options
and global_options_set are in use. (It doesn't in fact use the _set
information at all - but if it (and the target_option.optimization
hooks) did so, that would provide 90% of a solution to PR 38716
regarding how optimize attributes work with explicitly overridden
options. A full solution would require dealing with cases where a
-f option is implied by another -f option (which takes precedence
over implication by a -O option); that would involve _set storing
information about the closeness of an option that implied another
option, for the notion of closeness I mentioned in appendix 1 to my
original multilibs proposal, rather than just storing a binary
explicit/implicit state.)
* Similarly, what decode_options does after calling option handlers is
moved into finish_options. This also has yet to be converted to use
options structures explicitly, or to be separated into parts working
on options structures versus those using other state. Also, there
is some initialization after decode_options, including in
process_options called from do_compile and in the target option
override hook, which again should be split up and moved into the two
parts of finish_options.
* The rearrangements in this patch eliminate most checks on the
first_time_p variable that was in decode_options. It is now in
finish_options and only checked for flag_pic/flag_shlib
initialization. This variable serves to distinguish the initial
call from calls from "optimize" attributes. If those attributes
worked with the options structure from before finish_options, it
would not be a problem for finish_options to be called more than
once without needing any checks there on first_time_p.
Bootstrapped with no regressions on x86_64-unknown-linux-gnu. OK to
commit?
2010-10-07 Joseph Myers <joseph@codesourcery.com>
* Makefile.in (TM_H): Include $(FLAGS_H) instead of options.h.
(TREE_H): Include $(FLAGS_H) instead of options.h.
(opts-common.o): Depend on $(FLAGS_H) instead of options.h.
* c-objc-common.h (LANG_HOOKS_INIT_OPTIONS_STRUCT): Define.
* common.opt (flag_complex_method, flag_evaluation_order,
flag_ira_algorithm, flag_ira_region, flag_warn_unused_result): New
Variable declarations.
* configure.ac (tm_include_list): Include flags.h instead of
options.h.
* configure: Regenerate.
* flags.h: Condition out contents for target libraries. Include
options.h at end of file.
(flag_complex_method, flag_ira_algorithm, flag_ira_region,
flag_evaluation_order, flag_warn_unused_result): Remove.
* gcc.c (main): Intialize global_options with global_options_init.
* langhooks-def.h (lhd_init_options_struct): Declare.
(LANG_HOOKS_INIT_OPTIONS_STRUCT): Define.
(LANG_HOOKS_INITIALIZER): Include LANG_HOOKS_INIT_OPTIONS_STRUCT.
* langhooks.c (lhd_init_options_struct): New.
* langhooks.h (struct lang_hooks): Add init_options_struct.
Update comment on init_options.
* optc-gen.awk: Generate initializer for global_options_init, not
global_options.
* opth-gen.awk: Condition out structure declarations for target
libraries. Declare global_options_init.
* opts-common.c: Include flags.h instead of options.h.
* opts.c (flag_warn_unused_result): Remove.
(read_cmdline_options): Take gcc_options parameters. Pass them to
read_cmdline_option.
(initial_lang_mask, initial_min_crossjump_insns,
initial_max_fields_for_field_sensitive,
initial_loop_invariant_max_bbs_in_loop): Define at file scope.
(init_options_once): New. Split out of decode_options.
(init_options_struct): New. Split out of decode_options.
(decode_cmdline_options_to_array_default_mask): New.
(default_options_optimization): New. Split out of decode_options.
(decode_options): Move most code to other functions. Update call
to read_cmdline_options.
(finish_options): New. Split out of decode_options.
* opts.h (decode_options): Add gcc_options parameters.
(init_options_once, init_options_struct,
decode_cmdline_options_to_array_default_mask): New.
* toplev.c (flag_complex_method, flag_ira_algorithm,
flag_ira_region, flag_evaluation_order): Remove.
(general_init): Use global_options_init for initial flag values
for global_dc.
(toplev_main): Call init_options_once, init_options_struct,
lang_hooks.init_options_struct,
decode_cmdline_options_to_array_default_mask and
lang_hooks.init_option before decode_options. Update arguments to
decode_options.
* tree.h: Include flags.h instead of options.h.
ada:
2010-10-07 Joseph Myers <joseph@codesourcery.com>
* gcc-interface/misc.c (gnat_init_options_struct): New. Split out
from gnat_init_options.
(LANG_HOOKS_INIT_OPTIONS_STRUCT): Define.
c-family:
2010-10-07 Joseph Myers <joseph@codesourcery.com>
* c-common.c (parse_optimize_options): Call
decode_cmdline_options_to_array_default_mask before
decode_options. Update arguments to decode_options.
* c-common.h (c_common_init_options_struct): Declare.
* c-opts.c (c_common_init_options_struct): New. Split out from
c_common_init_options.
cp:
2010-10-07 Joseph Myers <joseph@codesourcery.com>
* cp-objcp-common.h (LANG_HOOKS_INIT_OPTIONS_STRUCT): Define.
fortran:
2010-10-07 Joseph Myers <joseph@codesourcery.com>
* f95-lang.c (LANG_HOOKS_INIT_OPTIONS_STRUCT): Define.
* gfortran.h (gfc_init_options_struct): Declare.
* options.c (gfc_init_options_struct): New. Split out from
gfc_init_options.
java:
2010-10-07 Joseph Myers <joseph@codesourcery.com>
* lang.c (java_init_options_struct): New. Split out from
java_init_options.
(LANG_HOOKS_INIT_OPTIONS_STRUCT): Define.
lto:
2010-10-07 Joseph Myers <joseph@codesourcery.com>
* lto-lang.c (lto_init_options): Change to
lto_init_options_struct. Update parameters.
(LANG_HOOKS_INIT_OPTIONS): Don't define.
(LANG_HOOKS_INIT_OPTIONS_STRUCT): Define.
Index: gcc/flags.h
===================================================================
--- gcc/flags.h (revision 164991)
+++ gcc/flags.h (working copy)
@@ -23,7 +23,8 @@ along with GCC; see the file COPYING3.
#define GCC_FLAGS_H
#include "coretypes.h"
-#include "options.h"
+
+#if !defined(IN_LIBGCC2) && !defined(IN_TARGET_LIBS) && !defined(IN_RTS)
enum debug_info_type
{
@@ -147,12 +148,6 @@ extern int flag_print_asm_name;
/* Now the symbols that are set with `-f' switches. */
-/* 0 means straightforward implementation of complex divide acceptable.
- 1 means wide ranges of inputs must work for complex divide.
- 2 means C99-like requirements for complex multiply and divide. */
-
-extern int flag_complex_method;
-
/* Nonzero if we are only using compiler to check syntax errors. */
extern int rtl_dump_and_exit;
@@ -201,8 +196,6 @@ enum ira_algorithm
IRA_ALGORITHM_PRIORITY
};
-extern enum ira_algorithm flag_ira_algorithm;
-
/* The regions used for the integrated register allocator (IRA). */
enum ira_region
{
@@ -211,8 +204,6 @@ enum ira_region
IRA_REGION_MIXED
};
-extern enum ira_region flag_ira_region;
-
/* The options for excess precision. */
enum excess_precision
{
@@ -269,12 +260,6 @@ extern struct target_flag_state *this_ta
#define flag_excess_precision \
(this_target_flag_state->x_flag_excess_precision)
-/* Nonzero if subexpressions must be evaluated from left-to-right. */
-extern int flag_evaluation_order;
-
-/* Whether to run the warn_unused_result attribute pass. */
-extern bool flag_warn_unused_result;
-
/* Nonzero if we dump in VCG format, not plain text. */
extern int dump_for_graph;
@@ -369,4 +354,10 @@ enum warn_strict_overflow_code
/* Whether to emit an overflow warning whose code is C. */
#define issue_strict_overflow_warning(c) (warn_strict_overflow >= (int) (c))
+#endif
+
+/* This is included last because options may use types declared
+ above. */
+#include "options.h"
+
#endif /* ! GCC_FLAGS_H */
Index: gcc/opts-common.c
===================================================================
--- gcc/opts-common.c (revision 164991)
+++ gcc/opts-common.c (working copy)
@@ -22,7 +22,7 @@ along with GCC; see the file COPYING3.
#include "intl.h"
#include "coretypes.h"
#include "opts.h"
-#include "options.h"
+#include "flags.h"
#include "diagnostic.h"
#include "tm.h" /* For SWITCH_TAKES_ARG, WORD_SWITCH_TAKES_ARG and
TARGET_OPTION_TRANSLATE_TABLE. */
Index: gcc/c-family/c-opts.c
===================================================================
--- gcc/c-family/c-opts.c (revision 164991)
+++ gcc/c-family/c-opts.c (working copy)
@@ -273,6 +273,19 @@ c_common_complain_wrong_lang_p (const st
return true;
}
+/* Initialize options structure OPTS. */
+void
+c_common_init_options_struct (struct gcc_options *opts)
+{
+ opts->x_flag_exceptions = c_dialect_cxx ();
+ opts->x_warn_pointer_arith = c_dialect_cxx ();
+ opts->x_warn_write_strings = c_dialect_cxx ();
+ opts->x_flag_warn_unused_result = true;
+
+ /* By default, C99-like requirements for complex multiply and divide. */
+ opts->x_flag_complex_method = 2;
+}
+
/* Common initialization before calling option handlers. */
void
c_common_init_options (unsigned int decoded_options_count,
@@ -294,14 +307,6 @@ c_common_init_options (unsigned int deco
before passing on command-line options to cpplib. */
cpp_opts->warn_dollars = 0;
- flag_exceptions = c_dialect_cxx ();
- warn_pointer_arith = c_dialect_cxx ();
- warn_write_strings = c_dialect_cxx();
- flag_warn_unused_result = true;
-
- /* By default, C99-like requirements for complex multiply and divide. */
- flag_complex_method = 2;
-
deferred_opts = XNEWVEC (struct deferred_opt, decoded_options_count);
if (c_language == clk_c)
Index: gcc/c-family/c-common.c
===================================================================
--- gcc/c-family/c-common.c (revision 164991)
+++ gcc/c-family/c-common.c (working copy)
@@ -7802,8 +7802,11 @@ parse_optimize_options (tree args, bool
saved_flag_strict_aliasing = flag_strict_aliasing;
/* Now parse the options. */
- decode_options (opt_argc, opt_argv, &decoded_options,
- &decoded_options_count);
+ decode_cmdline_options_to_array_default_mask (opt_argc, opt_argv,
+ &decoded_options,
+ &decoded_options_count);
+ decode_options (&global_options, &global_options_set,
+ decoded_options, decoded_options_count);
targetm.override_options_after_change();
Index: gcc/c-family/c-common.h
===================================================================
--- gcc/c-family/c-common.h (revision 164991)
+++ gcc/c-family/c-common.h (working copy)
@@ -743,6 +743,7 @@ extern tree build_va_arg (location_t, tr
extern unsigned int c_common_option_lang_mask (void);
extern void c_common_initialize_diagnostics (diagnostic_context *);
extern bool c_common_complain_wrong_lang_p (const struct cl_option *);
+extern void c_common_init_options_struct (struct gcc_options *);
extern void c_common_init_options (unsigned int, struct cl_decoded_option *);
extern bool c_common_post_options (const char **);
extern bool c_common_init (void);
Index: gcc/java/lang.c
===================================================================
--- gcc/java/lang.c (revision 164991)
+++ gcc/java/lang.c (working copy)
@@ -48,6 +48,7 @@ The Free Software Foundation is independ
static bool java_init (void);
static void java_finish (void);
static unsigned int java_option_lang_mask (void);
+static void java_init_options_struct (struct gcc_options *);
static void java_init_options (unsigned int, struct cl_decoded_option *);
static bool java_post_options (const char **);
@@ -126,6 +127,8 @@ struct GTY(()) language_function {
#define LANG_HOOKS_FINISH java_finish
#undef LANG_HOOKS_OPTION_LANG_MASK
#define LANG_HOOKS_OPTION_LANG_MASK java_option_lang_mask
+#undef LANG_HOOKS_INIT_OPTIONS_STRUCT
+#define LANG_HOOKS_INIT_OPTIONS_STRUCT java_init_options_struct
#undef LANG_HOOKS_INIT_OPTIONS
#define LANG_HOOKS_INIT_OPTIONS java_init_options
#undef LANG_HOOKS_HANDLE_OPTION
@@ -535,23 +538,29 @@ java_option_lang_mask (void)
return CL_Java;
}
+/* Initialize options structure OPTS. */
+
static void
-java_init_options (unsigned int decoded_options_count ATTRIBUTE_UNUSED,
- struct cl_decoded_option *decoded_options ATTRIBUTE_UNUSED)
+java_init_options_struct (struct gcc_options *opts)
{
- flag_bounds_check = 1;
- flag_exceptions = 1;
- flag_non_call_exceptions = 1;
+ opts->x_flag_bounds_check = 1;
+ opts->x_flag_exceptions = 1;
+ opts->x_flag_non_call_exceptions = 1;
/* In Java floating point operations never trap. */
- flag_trapping_math = 0;
+ opts->x_flag_trapping_math = 0;
/* In Java arithmetic overflow always wraps around. */
- flag_wrapv = 1;
+ opts->x_flag_wrapv = 1;
/* Java requires left-to-right evaluation of subexpressions. */
- flag_evaluation_order = 1;
+ opts->x_flag_evaluation_order = 1;
+}
+static void
+java_init_options (unsigned int decoded_options_count ATTRIBUTE_UNUSED,
+ struct cl_decoded_option *decoded_options ATTRIBUTE_UNUSED)
+{
jcf_path_init ();
}
Index: gcc/tree.h
===================================================================
--- gcc/tree.h (revision 164991)
+++ gcc/tree.h (working copy)
@@ -32,7 +32,7 @@ along with GCC; see the file COPYING3.
#include "real.h"
#include "fixed-value.h"
#include "alias.h"
-#include "options.h"
+#include "flags.h"
/* Codes of tree nodes */
Index: gcc/configure
===================================================================
--- gcc/configure (revision 164991)
+++ gcc/configure (working copy)
@@ -10843,7 +10843,7 @@ tmake_file="${tmake_file_}"
out_object_file=`basename $out_file .c`.o
tm_file_list="options.h"
-tm_include_list="options.h insn-constants.h"
+tm_include_list="flags.h insn-constants.h"
for f in $tm_file; do
case $f in
./* )
Index: gcc/gcc.c
===================================================================
--- gcc/gcc.c (revision 164991)
+++ gcc/gcc.c (working copy)
@@ -6135,6 +6135,8 @@ main (int argc, char **argv)
if (argv != old_argv)
at_file_supplied = true;
+ global_options = global_options_init;
+
decode_cmdline_options_to_array (argc, CONST_CAST2 (const char **, char **,
argv),
CL_DRIVER,
Index: gcc/toplev.c
===================================================================
--- gcc/toplev.c (revision 164991)
+++ gcc/toplev.c (working copy)
@@ -198,12 +198,6 @@ unsigned local_tick;
/* -f flags. */
-/* 0 means straightforward implementation of complex divide acceptable.
- 1 means wide ranges of inputs must work for complex divide.
- 2 means C99-like requirements for complex multiply and divide. */
-
-int flag_complex_method = 1;
-
/* Nonzero means we should be saving declaration info into a .X file. */
int flag_gen_aux_info = 0;
@@ -229,12 +223,6 @@ int flag_next_runtime = 0;
enum tls_model flag_tls_default = TLS_MODEL_GLOBAL_DYNAMIC;
-/* Set the default region and algorithm for the integrated register
- allocator. */
-
-enum ira_algorithm flag_ira_algorithm = IRA_ALGORITHM_CB;
-enum ira_region flag_ira_region = IRA_REGION_MIXED;
-
/* Set the default for excess precision. */
enum excess_precision flag_excess_precision_cmdline = EXCESS_PRECISION_DEFAULT;
@@ -293,9 +281,6 @@ typedef struct
}
lang_independent_options;
-/* Nonzero if subexpressions must be evaluated from left-to-right. */
-int flag_evaluation_order = 0;
-
/* The user symbol prefix after having resolved same. */
const char *user_label_prefix;
@@ -1661,8 +1646,10 @@ general_init (const char *argv0)
/* Set a default printer. Language specific initializations will
override it later. */
pp_format_decoder (global_dc->printer) = &default_tree_printer;
- global_dc->show_option_requested = flag_diagnostics_show_option;
- global_dc->show_column = flag_show_column;
+ global_dc->show_option_requested
+ = global_options_init.x_flag_diagnostics_show_option;
+ global_dc->show_column
+ = global_options_init.x_flag_show_column;
global_dc->internal_error = plugins_internal_error_function;
global_dc->option_enabled = option_enabled;
global_dc->option_state = &global_options;
@@ -2395,10 +2382,29 @@ toplev_main (int argc, char **argv)
/* Initialization of GCC's environment, and diagnostics. */
general_init (argv[0]);
+ /* One-off initialization of options that does not need to be
+ repeated when options are added for particular functions. */
+ init_options_once ();
+
+ /* Initialize global options structures; this must be repeated for
+ each structure used for parsing options. */
+ init_options_struct (&global_options, &global_options_set);
+ lang_hooks.init_options_struct (&global_options);
+
+ /* Convert the options to an array. */
+ decode_cmdline_options_to_array_default_mask (argc,
+ CONST_CAST2 (const char **,
+ char **, argv),
+ &save_decoded_options,
+ &save_decoded_options_count);
+
+ /* Perform language-specific options initialization. */
+ lang_hooks.init_options (save_decoded_options_count, save_decoded_options);
+
/* Parse the options and do minimal processing; basically just
enough to default flags appropriately. */
- decode_options (argc, CONST_CAST2 (const char **, char **, argv),
- &save_decoded_options, &save_decoded_options_count);
+ decode_options (&global_options, &global_options_set,
+ save_decoded_options, save_decoded_options_count);
init_local_tick ();
Index: gcc/cp/cp-objcp-common.h
===================================================================
--- gcc/cp/cp-objcp-common.h (revision 164991)
+++ gcc/cp/cp-objcp-common.h (working copy)
@@ -45,6 +45,8 @@ extern bool cp_function_decl_explicit_p
#define LANG_HOOKS_OPTION_LANG_MASK c_common_option_lang_mask
#undef LANG_HOOKS_COMPLAIN_WRONG_LANG_P
#define LANG_HOOKS_COMPLAIN_WRONG_LANG_P c_common_complain_wrong_lang_p
+#undef LANG_HOOKS_INIT_OPTIONS_STRUCT
+#define LANG_HOOKS_INIT_OPTIONS_STRUCT c_common_init_options_struct
#undef LANG_HOOKS_INIT_OPTIONS
#define LANG_HOOKS_INIT_OPTIONS c_common_init_options
#undef LANG_HOOKS_INITIALIZE_DIAGNOSTICS
Index: gcc/c-objc-common.h
===================================================================
--- gcc/c-objc-common.h (revision 164991)
+++ gcc/c-objc-common.h (working copy)
@@ -33,6 +33,8 @@ along with GCC; see the file COPYING3.
#define LANG_HOOKS_OPTION_LANG_MASK c_common_option_lang_mask
#undef LANG_HOOKS_COMPLAIN_WRONG_LANG_P
#define LANG_HOOKS_COMPLAIN_WRONG_LANG_P c_common_complain_wrong_lang_p
+#undef LANG_HOOKS_INIT_OPTIONS_STRUCT
+#define LANG_HOOKS_INIT_OPTIONS_STRUCT c_common_init_options_struct
#undef LANG_HOOKS_INIT_OPTIONS
#define LANG_HOOKS_INIT_OPTIONS c_common_init_options
#undef LANG_HOOKS_INITIALIZE_DIAGNOSTICS
Index: gcc/opts.c
===================================================================
--- gcc/opts.c (revision 164991)
+++ gcc/opts.c (working copy)
@@ -353,9 +353,6 @@ DEF_VEC_ALLOC_P(const_char_p,heap);
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;
@@ -613,11 +610,14 @@ flag_instrument_functions_exclude_p (tre
}
-/* Handle the vector of command line options. LANG_MASK
- contains has a single bit set representing the current
- language. HANDLERS describes what functions to call for the options. */
+/* Handle the vector of command line options, storing the results of
+ processing DECODED_OPTIONS and DECODED_OPTIONS_COUNT in OPTS and
+ OPTS_SET. LANG_MASK contains has a single bit set representing the
+ current language. HANDLERS describes what functions to call for
+ the options. */
static void
-read_cmdline_options (struct cl_decoded_option *decoded_options,
+read_cmdline_options (struct gcc_options *opts, struct gcc_options *opts_set,
+ struct cl_decoded_option *decoded_options,
unsigned int decoded_options_count,
unsigned int lang_mask,
const struct cl_option_handlers *handlers)
@@ -628,6 +628,11 @@ read_cmdline_options (struct cl_decoded_
{
if (decoded_options[i].opt_index == OPT_SPECIAL_input_file)
{
+ /* Input files should only ever appear on the main command
+ line. */
+ gcc_assert (opts == &global_options);
+ gcc_assert (opts_set == &global_options_set);
+
if (main_input_filename == NULL)
{
main_input_filename = decoded_options[i].arg;
@@ -638,76 +643,104 @@ read_cmdline_options (struct cl_decoded_
continue;
}
- read_cmdline_option (&global_options, &global_options_set,
+ read_cmdline_option (opts, opts_set,
decoded_options + i, lang_mask, handlers,
global_dc);
}
}
-/* Parse command line options and set default flag values. Do minimal
- options processing. The decoded options are placed in *DECODED_OPTIONS
- and *DECODED_OPTIONS_COUNT. */
+/* Language mask determined at initialization. */
+static unsigned int initial_lang_mask;
+
+/* Initial values of parameters we reset. */
+static int initial_min_crossjump_insns;
+static int initial_max_fields_for_field_sensitive;
+static int initial_loop_invariant_max_bbs_in_loop;
+
+/* Initialize global options-related settings at start-up. */
+
void
-decode_options (unsigned int argc, const char **argv,
- struct cl_decoded_option **decoded_options,
- unsigned int *decoded_options_count)
+init_options_once (void)
{
- static bool first_time_p = true;
- static int initial_min_crossjump_insns;
- static int initial_max_fields_for_field_sensitive;
- static int initial_loop_invariant_max_bbs_in_loop;
- static unsigned int initial_lang_mask;
- struct cl_option_handlers handlers;
+ /* Perform language-specific options initialization. */
+ initial_lang_mask = lang_hooks.option_lang_mask ();
- unsigned int i, lang_mask;
- int opt1;
- int opt2;
- int opt3;
- int opt1_max;
- int ofast = 0;
- enum unwind_info_type ui_except;
+ lang_hooks.initialize_diagnostics (global_dc);
- if (first_time_p)
- {
- /* Perform language-specific options initialization. */
- initial_lang_mask = lang_mask = lang_hooks.option_lang_mask ();
+ /* Save initial values of parameters we reset. */
+ initial_min_crossjump_insns
+ = compiler_params[PARAM_MIN_CROSSJUMP_INSNS].value;
+ initial_max_fields_for_field_sensitive
+ = compiler_params[PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE].value;
+ initial_loop_invariant_max_bbs_in_loop
+ = compiler_params[PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP].value;
+}
- lang_hooks.initialize_diagnostics (global_dc);
+/* Initialize OPTS and OPTS_SET before using them in parsing options. */
- /* Save initial values of parameters we reset. */
- initial_min_crossjump_insns
- = compiler_params[PARAM_MIN_CROSSJUMP_INSNS].value;
- initial_max_fields_for_field_sensitive
- = compiler_params[PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE].value;
- initial_loop_invariant_max_bbs_in_loop
- = compiler_params[PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP].value;
- }
- else
- lang_mask = initial_lang_mask;
+void
+init_options_struct (struct gcc_options *opts, struct gcc_options *opts_set)
+{
+ *opts = global_options_init;
+ memset (opts_set, 0, sizeof (*opts_set));
+
+ /* Use priority coloring if cover classes is not defined for the
+ target. */
+ if (targetm.ira_cover_classes == NULL)
+ opts->x_flag_ira_algorithm = IRA_ALGORITHM_PRIORITY;
+
+ /* Initialize whether `char' is signed. */
+ opts->x_flag_signed_char = DEFAULT_SIGNED_CHAR;
+ /* Set this to a special "uninitialized" value. The actual default
+ is set after target options have been processed. */
+ opts->x_flag_short_enums = 2;
+ /* Initialize target_flags before targetm.target_option.optimization
+ so the latter can modify it. */
+ opts->x_target_flags = targetm.default_target_flags;
+
+ /* Some targets have ABI-specified unwind tables. */
+ opts->x_flag_unwind_tables = targetm.unwind_tables_default;
+}
+
+/* Decode command-line options to an array, like
+ decode_cmdline_options_to_array and with the same arguments but
+ using the default lang_mask. */
+
+void
+decode_cmdline_options_to_array_default_mask (unsigned int argc,
+ const char **argv,
+ struct cl_decoded_option **decoded_options,
+ unsigned int *decoded_options_count)
+{
decode_cmdline_options_to_array (argc, argv,
- lang_mask | CL_COMMON | CL_TARGET,
+ initial_lang_mask | CL_COMMON | CL_TARGET,
decoded_options, decoded_options_count);
- if (first_time_p)
- /* Perform language-specific options initialization. */
- lang_hooks.init_options (*decoded_options_count, *decoded_options);
+}
- handlers.unknown_option_callback = unknown_option_callback;
- handlers.wrong_lang_callback = complain_wrong_lang;
- handlers.post_handling_callback = post_handling_callback;
- handlers.num_handlers = 3;
- handlers.handlers[0].handler = lang_handle_option;
- handlers.handlers[0].mask = lang_mask;
- handlers.handlers[1].handler = common_handle_option;
- handlers.handlers[1].mask = CL_COMMON;
- handlers.handlers[2].handler = target_handle_option;
- handlers.handlers[2].mask = CL_TARGET;
+/* Default the options in OPTS and OPTS_SET based on the optimization
+ settings in DECODED_OPTIONS and DECODED_OPTIONS_COUNT. */
+static void
+default_options_optimization (struct gcc_options *opts,
+ struct gcc_options *opts_set,
+ struct cl_decoded_option *decoded_options,
+ unsigned int decoded_options_count)
+{
+ unsigned int i;
+ int opt1;
+ int opt2;
+ int opt3;
+ int opt1_max;
+ int ofast = 0;
+
+ gcc_assert (opts == &global_options);
+ gcc_assert (opts_set = &global_options_set);
/* Scan to see what optimization level has been specified. That will
determine the default value of many flags. */
- for (i = 1; i < *decoded_options_count; i++)
+ for (i = 1; i < decoded_options_count; i++)
{
- struct cl_decoded_option *opt = &(*decoded_options)[i];
+ struct cl_decoded_option *opt = &decoded_options[i];
switch (opt->opt_index)
{
case OPT_O:
@@ -755,11 +788,6 @@ decode_options (unsigned int argc, const
}
}
- /* Use priority coloring if cover classes is not defined for the
- target. */
- if (targetm.ira_cover_classes == NULL)
- flag_ira_algorithm = IRA_ALGORITHM_PRIORITY;
-
/* -O1 optimizations. */
opt1 = (optimize >= 1);
flag_defer_pop = opt1;
@@ -879,38 +907,68 @@ decode_options (unsigned int argc, const
targetm.handle_ofast ();
}
+ /* Allow default optimizations to be specified on a per-machine basis. */
+ targetm.target_option.optimization (optimize, optimize_size);
+}
+
+static void finish_options (struct gcc_options *, struct gcc_options *);
+
+/* Parse command line options and set default flag values. Do minimal
+ options processing. The decoded options are in *DECODED_OPTIONS
+ and *DECODED_OPTIONS_COUNT. */
+void
+decode_options (struct gcc_options *opts, struct gcc_options *opts_set,
+ struct cl_decoded_option *decoded_options,
+ unsigned int decoded_options_count)
+{
+ struct cl_option_handlers handlers;
+
+ unsigned int lang_mask;
+
+ lang_mask = initial_lang_mask;
+
+ handlers.unknown_option_callback = unknown_option_callback;
+ handlers.wrong_lang_callback = complain_wrong_lang;
+ handlers.post_handling_callback = post_handling_callback;
+ handlers.num_handlers = 3;
+ handlers.handlers[0].handler = lang_handle_option;
+ handlers.handlers[0].mask = lang_mask;
+ handlers.handlers[1].handler = common_handle_option;
+ handlers.handlers[1].mask = CL_COMMON;
+ handlers.handlers[2].handler = target_handle_option;
+ handlers.handlers[2].mask = CL_TARGET;
+
/* Enable -Werror=coverage-mismatch by default */
enable_warning_as_error ("coverage-mismatch", 1, lang_mask, &handlers,
global_dc);
- if (first_time_p)
- {
- /* 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
- targetm.target_option.optimization so the latter can modify
- it. */
- target_flags = targetm.default_target_flags;
-
- /* Some targets have ABI-specified unwind tables. */
- flag_unwind_tables = targetm.unwind_tables_default;
- }
+ default_options_optimization (opts, opts_set,
+ decoded_options, decoded_options_count);
#ifdef ENABLE_LTO
/* Clear any options currently held for LTO. */
lto_clear_user_options ();
#endif
- /* Allow default optimizations to be specified on a per-machine basis. */
- targetm.target_option.optimization (optimize, optimize_size);
-
- read_cmdline_options (*decoded_options, *decoded_options_count, lang_mask,
+ read_cmdline_options (opts, opts_set,
+ decoded_options, decoded_options_count, lang_mask,
&handlers);
+ finish_options (opts, opts_set);
+}
+
+/* After all options have been read into OPTS and OPTS_SET, finalize
+ settings of those options and diagnose incompatible
+ combinations. */
+static void
+finish_options (struct gcc_options *opts, struct gcc_options *opts_set)
+{
+ static bool first_time_p = true;
+ enum unwind_info_type ui_except;
+
+ gcc_assert (opts == &global_options);
+ gcc_assert (opts_set = &global_options_set);
+
if (dump_base_name && ! IS_ABSOLUTE_PATH (dump_base_name))
{
/* First try to make DUMP_BASE_NAME relative to the DUMP_DIR_NAME
Index: gcc/opts.h
===================================================================
--- gcc/opts.h (revision 164991)
+++ gcc/opts.h (working copy)
@@ -208,9 +208,17 @@ extern void decode_cmdline_options_to_ar
unsigned int lang_mask,
struct cl_decoded_option **decoded_options,
unsigned int *decoded_options_count);
-extern void decode_options (unsigned int argc, const char **argv,
- struct cl_decoded_option **decoded_options,
- unsigned int *decoded_options_count);
+extern void init_options_once (void);
+extern void init_options_struct (struct gcc_options *opts,
+ struct gcc_options *opts_set);
+extern void decode_cmdline_options_to_array_default_mask (unsigned int argc,
+ const char **argv,
+ struct cl_decoded_option **decoded_options,
+ unsigned int *decoded_options_count);
+extern void decode_options (struct gcc_options *opts,
+ struct gcc_options *opts_set,
+ struct cl_decoded_option *decoded_options,
+ unsigned int decoded_options_count);
extern int option_enabled (int opt_idx, void *opts);
extern bool get_option_state (struct gcc_options *, int,
struct cl_option_state *);
Index: gcc/optc-gen.awk
===================================================================
--- gcc/optc-gen.awk (revision 164991)
+++ gcc/optc-gen.awk (working copy)
@@ -83,7 +83,7 @@ print "#endif /* GCC_DRIVER */"
print ""
have_save = 0;
-print "struct gcc_options global_options =\n{"
+print "const struct gcc_options global_options_init =\n{"
for (i = 0; i < n_extra_vars; i++) {
var = extra_vars[i]
init = extra_vars[i]
@@ -138,6 +138,7 @@ for (i = 0; i < n_opts; i++) {
}
print "};"
print ""
+print "struct gcc_options global_options;"
print "struct gcc_options global_options_set;"
print ""
Index: gcc/ada/gcc-interface/misc.c
===================================================================
--- gcc/ada/gcc-interface/misc.c (revision 164991)
+++ gcc/ada/gcc-interface/misc.c (working copy)
@@ -62,6 +62,7 @@
static bool gnat_init (void);
static unsigned int gnat_option_lang_mask (void);
+static void gnat_init_options_struct (struct gcc_options *);
static void gnat_init_options (unsigned int,
struct cl_decoded_option *);
static bool gnat_handle_option (size_t, const char *, int, int,
@@ -91,6 +92,8 @@ static tree gnat_eh_personality (void);
#define LANG_HOOKS_INIT gnat_init
#undef LANG_HOOKS_OPTION_LANG_MASK
#define LANG_HOOKS_OPTION_LANG_MASK gnat_option_lang_mask
+#undef LANG_HOOKS_INIT_OPTIONS_STRUCT
+#define LANG_HOOKS_INIT_OPTIONS_STRUCT gnat_init_options_struct
#undef LANG_HOOKS_INIT_OPTIONS
#define LANG_HOOKS_INIT_OPTIONS gnat_init_options
#undef LANG_HOOKS_HANDLE_OPTION
@@ -256,6 +259,15 @@ gnat_option_lang_mask (void)
return CL_Ada;
}
+/* Initialize options structure OPTS. */
+
+static void
+gnat_init_options_struct (struct gcc_options *opts)
+{
+ /* Uninitialized really means uninitialized in Ada. */
+ opts->x_flag_zero_initialized_in_bss = 0;
+}
+
/* Initialize for option processing. */
static void
@@ -298,9 +310,6 @@ gnat_init_options (unsigned int decoded_
gnat_argv = (char **) xmalloc (sizeof (save_argv[0]));
gnat_argv[0] = xstrdup (save_argv[0]); /* name of the command */
gnat_argc = 1;
-
- /* Uninitialized really means uninitialized in Ada. */
- flag_zero_initialized_in_bss = 0;
}
/* Ada code requires variables for these settings rather than elements
Index: gcc/fortran/gfortran.h
===================================================================
--- gcc/fortran/gfortran.h (revision 164991)
+++ gcc/fortran/gfortran.h (working copy)
@@ -2398,6 +2398,7 @@ int get_c_kind (const char *, CInteropKi
/* options.c */
unsigned int gfc_option_lang_mask (void);
+void gfc_init_options_struct (struct gcc_options *);
void gfc_init_options (unsigned int,
struct cl_decoded_option *);
bool gfc_handle_option (size_t, const char *, int, int,
Index: gcc/fortran/f95-lang.c
===================================================================
--- gcc/fortran/f95-lang.c (revision 164991)
+++ gcc/fortran/f95-lang.c (working copy)
@@ -102,6 +102,7 @@ static void gfc_init_ts (void);
#undef LANG_HOOKS_FINISH
#undef LANG_HOOKS_WRITE_GLOBALS
#undef LANG_HOOKS_OPTION_LANG_MASK
+#undef LANG_HOOKS_INIT_OPTIONS_STRUCT
#undef LANG_HOOKS_INIT_OPTIONS
#undef LANG_HOOKS_HANDLE_OPTION
#undef LANG_HOOKS_POST_OPTIONS
@@ -132,6 +133,7 @@ static void gfc_init_ts (void);
#define LANG_HOOKS_FINISH gfc_finish
#define LANG_HOOKS_WRITE_GLOBALS gfc_write_global_declarations
#define LANG_HOOKS_OPTION_LANG_MASK gfc_option_lang_mask
+#define LANG_HOOKS_INIT_OPTIONS_STRUCT gfc_init_options_struct
#define LANG_HOOKS_INIT_OPTIONS gfc_init_options
#define LANG_HOOKS_HANDLE_OPTION gfc_handle_option
#define LANG_HOOKS_POST_OPTIONS gfc_post_options
Index: gcc/fortran/options.c
===================================================================
--- gcc/fortran/options.c (revision 164991)
+++ gcc/fortran/options.c (working copy)
@@ -62,6 +62,14 @@ gfc_option_lang_mask (void)
return CL_Fortran;
}
+/* Initialize options structure OPTS. */
+
+void
+gfc_init_options_struct (struct gcc_options *opts)
+{
+ opts->x_flag_errno_math = 0;
+ opts->x_flag_associative_math = -1;
+}
/* Get ready for options handling. Keep in sync with
libgfortran/runtime/compile_options.c (init_compile_options). */
@@ -145,14 +153,8 @@ gfc_init_options (unsigned int decoded_o
gfc_option.rtcheck = 0;
gfc_option.coarray = GFC_FCOARRAY_NONE;
- flag_errno_math = 0;
- flag_associative_math = -1;
-
set_default_std_flags ();
- /* -fshort-enums can be default on some targets. */
- flag_short_enums = targetm.default_short_enums ();
-
/* Initialize cpp-related options. */
gfc_cpp_init_options (decoded_options_count, decoded_options);
}
Index: gcc/configure.ac
===================================================================
--- gcc/configure.ac (revision 164991)
+++ gcc/configure.ac (working copy)
@@ -1609,7 +1609,7 @@ tmake_file="${tmake_file_}"
out_object_file=`basename $out_file .c`.o
tm_file_list="options.h"
-tm_include_list="options.h insn-constants.h"
+tm_include_list="flags.h insn-constants.h"
for f in $tm_file; do
case $f in
./* )
Index: gcc/langhooks.c
===================================================================
--- gcc/langhooks.c (revision 164991)
+++ gcc/langhooks.c (working copy)
@@ -337,6 +337,12 @@ lhd_initialize_diagnostics (diagnostic_c
{
}
+/* Called to perform language-specific options initialization of OPTS. */
+void
+lhd_init_options_struct (struct gcc_options *opts ATTRIBUTE_UNUSED)
+{
+}
+
/* Called to perform language-specific options initialization. */
void
lhd_init_options (unsigned int decoded_options_count ATTRIBUTE_UNUSED,
Index: gcc/langhooks.h
===================================================================
--- gcc/langhooks.h (revision 164991)
+++ gcc/langhooks.h (working copy)
@@ -267,8 +267,12 @@ struct lang_hooks
of options. */
unsigned int (*option_lang_mask) (void);
+ /* Initialize variables in an options structure. */
+ void (*init_options_struct) (struct gcc_options *opts);
+
/* After the initialize_diagnostics hook is called, do any simple
- initialization needed before any calls to handle_option. */
+ initialization needed before any calls to handle_option, other
+ than that done by the init_options_struct hook. */
void (*init_options) (unsigned int decoded_options_count,
struct cl_decoded_option *decoded_options);
Index: gcc/lto/lto-lang.c
===================================================================
--- gcc/lto/lto-lang.c (revision 164991)
+++ gcc/lto/lto-lang.c (working copy)
@@ -639,14 +639,13 @@ lto_complain_wrong_lang_p (const struct
}
static void
-lto_init_options (unsigned int decoded_options_count ATTRIBUTE_UNUSED,
- struct cl_decoded_option *decoded_options ATTRIBUTE_UNUSED)
+lto_init_options_struct (struct gcc_options *opts)
{
/* By default, C99-like requirements for complex multiply and divide.
??? Until the complex method is encoded in the IL this is the only
safe choice. This will pessimize Fortran code with LTO unless
people specify a complex method manually or use -ffast-math. */
- flag_complex_method = 2;
+ opts->x_flag_complex_method = 2;
}
/* Handle command-line option SCODE. If the option takes an argument, it is
@@ -1162,8 +1161,8 @@ static void lto_init_ts (void)
#define LANG_HOOKS_OPTION_LANG_MASK lto_option_lang_mask
#undef LANG_HOOKS_COMPLAIN_WRONG_LANG_P
#define LANG_HOOKS_COMPLAIN_WRONG_LANG_P lto_complain_wrong_lang_p
-#undef LANG_HOOKS_INIT_OPTIONS
-#define LANG_HOOKS_INIT_OPTIONS lto_init_options
+#undef LANG_HOOKS_INIT_OPTIONS_STRUCT
+#define LANG_HOOKS_INIT_OPTIONS_STRUCT lto_init_options_struct
#undef LANG_HOOKS_HANDLE_OPTION
#define LANG_HOOKS_HANDLE_OPTION lto_handle_option
#undef LANG_HOOKS_POST_OPTIONS
Index: gcc/opth-gen.awk
===================================================================
--- gcc/opth-gen.awk (revision 164991)
+++ gcc/opth-gen.awk (working copy)
@@ -73,6 +73,7 @@ print ""
have_save = 0;
+print "#if !defined(IN_LIBGCC2) && !defined(IN_TARGET_LIBS) && !defined(IN_RTS)"
print "#ifndef GENERATOR_FILE"
print "struct gcc_options\n{"
print "#endif"
@@ -125,9 +126,11 @@ for (i = 0; i < n_opts; i++) {
print "#ifndef GENERATOR_FILE"
print "};"
print "extern struct gcc_options global_options;"
+print "extern const struct gcc_options global_options_init;"
print "extern struct gcc_options global_options_set;"
print "#define target_flags_explicit global_options_set.x_target_flags"
print "#endif"
+print "#endif"
print ""
# All of the optimization switches gathered together so they can be saved and restored.
Index: gcc/common.opt
===================================================================
--- gcc/common.opt (revision 164991)
+++ gcc/common.opt (working copy)
@@ -32,6 +32,29 @@ int optimize
Variable
int optimize_size
+; 0 means straightforward implementation of complex divide acceptable.
+; 1 means wide ranges of inputs must work for complex divide.
+; 2 means C99-like requirements for complex multiply and divide.
+Variable
+int flag_complex_method = 1
+
+; Nonzero if subexpressions must be evaluated from left-to-right.
+Variable
+int flag_evaluation_order = 0
+
+; Set the default region and algorithm for the integrated register
+; allocator.
+
+Variable
+enum ira_algorithm flag_ira_algorithm = IRA_ALGORITHM_CB
+
+Variable
+enum ira_region flag_ira_region = IRA_REGION_MIXED
+
+; Language specific warning pass for unused results.
+Variable
+bool flag_warn_unused_result = false
+
###
Driver
Index: gcc/Makefile.in
===================================================================
--- gcc/Makefile.in (revision 164991)
+++ gcc/Makefile.in (working copy)
@@ -823,7 +823,7 @@ CONFIG_H = config.h $(host_xm_file_lis
TCONFIG_H = tconfig.h $(xm_file_list)
TM_P_H = tm_p.h $(tm_p_file_list)
GTM_H = tm.h $(tm_file_list) insn-constants.h
-TM_H = $(GTM_H) insn-flags.h options.h
+TM_H = $(GTM_H) insn-flags.h $(FLAGS_H)
# Variables for version information.
BASEVER := $(srcdir)/BASE-VER # 4.x.y
@@ -884,7 +884,7 @@ BUILTINS_DEF = builtins.def sync-builtin
TREE_H = tree.h all-tree.def tree.def c-family/c-common.def \
$(lang_tree_files) $(MACHMODE_H) tree-check.h $(BUILTINS_DEF) \
$(INPUT_H) statistics.h $(VEC_H) treestruct.def $(HASHTAB_H) \
- double-int.h alias.h $(SYMTAB_H) options.h vecir.h \
+ double-int.h alias.h $(SYMTAB_H) $(FLAGS_H) vecir.h \
$(REAL_H) $(FIXED_VALUE_H)
REGSET_H = regset.h $(BITMAP_H) hard-reg-set.h
BASIC_BLOCK_H = basic-block.h $(PREDICT_H) $(VEC_H) $(FUNCTION_H) cfghooks.h
@@ -2821,7 +2821,7 @@ opts.o : opts.c opts.h options.h $(TOPLE
output.h $(DIAGNOSTIC_H) $(TM_P_H) $(INSN_ATTR_H) intl.h $(TARGET_H) \
$(FLAGS_H) $(PARAMS_H) $(TREE_PASS_H) $(DBGCNT_H) debug.h \
$(PLUGIN_H) $(EXCEPT_H) $(LTO_STREAMER_H) opts-diagnostic.h
-opts-common.o : opts-common.c opts.h options.h $(CONFIG_H) $(SYSTEM_H) \
+opts-common.o : opts-common.c opts.h $(FLAGS_H) $(CONFIG_H) $(SYSTEM_H) \
coretypes.h intl.h $(DIAGNOSTIC_H) $(TM_H)
targhooks.o : targhooks.c $(CONFIG_H) $(SYSTEM_H) coretypes.h $(TREE_H) \
$(EXPR_H) $(TM_H) $(RTL_H) $(TM_P_H) $(FUNCTION_H) output.h $(TOPLEV_H) $(DIAGNOSTIC_CORE_H) \
Index: gcc/langhooks-def.h
===================================================================
--- gcc/langhooks-def.h (revision 164991)
+++ gcc/langhooks-def.h (working copy)
@@ -65,6 +65,7 @@ extern tree lhd_builtin_function (tree);
/* Declarations of default tree inlining hooks. */
extern void lhd_initialize_diagnostics (diagnostic_context *);
+extern void lhd_init_options_struct (struct gcc_options *);
extern void lhd_init_options (unsigned int,
struct cl_decoded_option *);
extern bool lhd_complain_wrong_lang_p (const struct cl_option *);
@@ -87,6 +88,7 @@ extern void lhd_omp_firstprivatize_type_
#define LANG_HOOKS_FINISH lhd_do_nothing
#define LANG_HOOKS_PARSE_FILE lhd_do_nothing_i
#define LANG_HOOKS_OPTION_LANG_MASK hook_uint_void_0
+#define LANG_HOOKS_INIT_OPTIONS_STRUCT lhd_init_options_struct
#define LANG_HOOKS_INIT_OPTIONS lhd_init_options
#define LANG_HOOKS_INITIALIZE_DIAGNOSTICS lhd_initialize_diagnostics
#define LANG_HOOKS_COMPLAIN_WRONG_LANG_P lhd_complain_wrong_lang_p
@@ -262,6 +264,7 @@ extern void lhd_end_section (void);
LANG_HOOKS_FREE_LANG_DATA, \
LANG_HOOKS_TREE_SIZE, \
LANG_HOOKS_OPTION_LANG_MASK, \
+ LANG_HOOKS_INIT_OPTIONS_STRUCT, \
LANG_HOOKS_INIT_OPTIONS, \
LANG_HOOKS_INITIALIZE_DIAGNOSTICS, \
LANG_HOOKS_COMPLAIN_WRONG_LANG_P, \
--
Joseph S. Myers
joseph@codesourcery.com