gensupport.h File Reference

#include "hash-set.h"
#include "read-md.h"
#include "optabs.def"

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Data Structures
class	md_rtx_info
struct	optab_def
struct	optab_pattern
struct	c_test
struct	pred_data
struct	pattern_stats
struct	generator_output

Macros
#define	OPTAB_CL(name, pat, c, b, l)
#define	OPTAB_CX(name, pat)
#define	OPTAB_CD(name, pat)
#define	OPTAB_NL(name, pat, c, b, s, l)
#define	OPTAB_NC(name, pat, c)
#define	OPTAB_NX(name, pat)
#define	OPTAB_VL(name, pat, c, b, s, l)
#define	OPTAB_VC(name, pat, c)
#define	OPTAB_VX(name, pat)
#define	OPTAB_DC(name, pat, c)
#define	OPTAB_D(name, pat)
#define	FOR_ALL_PREDICATES(p)

Typedefs
typedef enum optab_tag	optab

Enumerations
enum	optab_tag { unknown_optab , NUM_OPTABS }

Functions
unsigned int	get_register_filter_id (const char *)
rtx	add_implicit_parallel (rtvec)
rtx_reader *	init_rtx_reader_args_cb (int, const char **, bool(*)(const char *))
rtx_reader *	init_rtx_reader_args (int, const char **)
int	count_patterns ()
bool	read_md_rtx (md_rtx_info *)
unsigned int	get_num_insn_codes ()
const char *	get_c_test (rtx)
int	maybe_eval_c_test (const char *)
void	add_c_test (const char *, int)
struct pred_data *	lookup_predicate (const char *)
void	add_predicate_code (struct pred_data *, enum rtx_code)
void	add_predicate (struct pred_data *)
void	get_pattern_stats (struct pattern_stats *ranges, rtvec vec)
void	compute_test_codes (rtx, file_location, char *)
file_location	get_file_location (rtx)
const char *	get_emit_function (rtx)
bool	find_optab (optab_pattern *, const char *)
unsigned int	add_generator_output (vec< generator_output > &, const char *, bool)
void	open_generator_outputs (vec< generator_output > &)
FILE *	choose_output (const vec< generator_output > &)
bool	close_generator_outputs (const vec< generator_output > &)

Variables
struct obstack *	rtl_obstack
optab_def	optabs []
unsigned int	num_optabs
vec< const char * >	register_filters
unsigned int	num_dependent_filters
int	insn_elision
struct pred_data *	first_predicate
hash_set< rtx >	compact_syntax

Macro Definition Documentation

FOR_ALL_PREDICATES

#define FOR_ALL_PREDICATES

(

p

)

Value:

for (p = first_predicate; p; p = p->next)

Referenced by write_insn_preds_c(), and write_tm_preds_h().

OPTAB_CD

#define OPTAB_CD	(		name,
			pat )

Value:

name,

OPTAB_CL

#define OPTAB_CL	(		name,
			pat,
			c,
			b,
			l )

Value:

name,

OPTAB_CX

#define OPTAB_CX	(		name,
			pat )

OPTAB_D

#define OPTAB_D	(		name,
			pat )

Value:

name,

OPTAB_DC

#define OPTAB_DC	(		name,
			pat,
			c )

Value:

name,

OPTAB_NC

#define OPTAB_NC	(		name,
			pat,
			c )

Value:

name,

OPTAB_NL

#define OPTAB_NL	(		name,
			pat,
			c,
			b,
			s,
			l )

Value:

name,

OPTAB_NX

#define OPTAB_NX	(		name,
			pat )

OPTAB_VC

#define OPTAB_VC	(		name,
			pat,
			c )

Value:

name,

OPTAB_VL

#define OPTAB_VL	(		name,
			pat,
			c,
			b,
			s,
			l )

Value:

name,

OPTAB_VX

#define OPTAB_VX	(		name,
			pat )

Typedef Documentation

optab

typedef enum optab_tag optab

Enumerates all optabs.   

Enumeration Type Documentation

optab_tag

enum optab_tag

Enumerates all optabs.   

Enumerator
unknown_optab
NUM_OPTABS	Definitions for operation tables, or "optabs". Copyright (C) 1987-2026 Free Software Foundation, Inc. This file is part of GCC. GCC is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3, or (at your option) any later version. GCC is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GCC; see the file COPYING3. If not see <http://www.gnu.org/licenses/>. The entries in optabs.def are categorized: C: A "conversion" optab, which uses two modes; has libcall data. N: A "normal" optab, which uses one mode; has libcall data. D: A "direct" optab, which uses one mode; does not have libcall data. V: An "oVerflow" optab. Like N, but does not record its code in code_to_optab. CX, NX, VX: An extra pattern entry for a conversion or normal optab. These patterns may be present in the MD file with names that contain the mode(s) used and the name of the operation. This array contains a list of optabs that need to be initialized. Within each name, $a and $b are used to match a short mode name (the part of the mode name not including `mode' and converted to lower-case). $I means that only full integer modes should be considered for the next mode, and $F means that only float modes should be considered. $P means that both full and partial integer modes should be considered. $Q means that only fixed-point modes should be considered. The pattern may be NULL if the optab exists only for the libcalls that we plan to attach to it, and there are no named patterns in the md files. WARNING: do not have a pattern name have a `c` right before a possible scalar mode, csi, cdi are valid modes (complex si/di) and the match is based on which pattern is done first. For an example `andc$a3` and `and$a3` with `andcsi3` will match which one comes first here. The extension libcalls are used for float extension. Conversions for fixed-point modes and other modes. Misc optabs that use two modes; model them as "conversions". Comparison libcalls for integers MUST come in pairs, signed/unsigned. EQ etc are floating point comparisons. These are all initialized individually, on a per-host basis. C99 implementations of fmax/fmin. Vector reduction to a scalar.

Function Documentation

add_c_test()

void add_c_test ( const char * expr, int value )

extern

Add an entry to the table of conditions.  Used by genconditions and
by read-rtl.cc.   

Record the C test expression EXPR in the condition_table, with
value VAL.  Duplicates clobber previous entries.   

References add_c_test(), condition_table, c_test::expr, and c_test::value.

Referenced by add_c_test(), and main().

add_generator_output()

unsigned int add_generator_output ( vec< generator_output > & outputs, const char * name, bool partition_p )

extern

Add output NAME to OUTPUTS.  A null NAME means standard output.
PARTITION_P is true if the output participates in size-based selection.
Return its index.   

References add_generator_output(), fatal(), gcc_assert, pred_data::name, and NULL.

Referenced by add_generator_output(), handle_arg(), handle_arg(), handle_arg(), and main().

add_implicit_parallel()

rtx add_implicit_parallel ( rtvec vec )

extern

Return the rtx pattern specified by the list of rtxes in a
define_insn or define_split.   

References add_implicit_parallel(), GET_NUM_ELEM, RTVEC_ELT, rtx_alloc(), and XVEC.

Referenced by add_implicit_parallel(), gen_insn(), gen_rewrite_sequence(), main(), and process_one_cond_exec().

add_predicate()

void add_predicate ( struct pred_data * pred )

extern

References add_predicate(), error(), last_predicate, pred_data::name, pred_data::next, and predicate_table.

add_predicate_code()

void add_predicate_code ( struct pred_data * pred, enum rtx_code code )

extern

Record that predicate PRED can accept CODE.   

References add_predicate_code(), pred_data::allows_non_const, pred_data::allows_non_lvalue, pred_data::codes, GET_RTX_CLASS, pred_data::num_codes, RTX_CONST_OBJ, and pred_data::singleton.

Referenced by add_predicate_code(), init_predicate_table(), and process_define_predicate().

choose_output()

FILE * choose_output ( const vec< generator_output > & outputs )

extern

Return the shortest partition file in OUTPUTS.   

References choose_output(), gcc_unreachable, and NULL.

Referenced by choose_output(), choose_output(), main(), main(), and print_subroutine_group().

close_generator_outputs()

bool close_generator_outputs ( const vec< generator_output > & outputs )

extern

Close all files in OUTPUTS.  Return true if every close succeeds.   

References close_generator_outputs(), errno, and error().

Referenced by close_generator_outputs(), and main().

compute_test_codes()

void compute_test_codes ( rtx exp, file_location loc, char * codes )

extern

Recursively calculate the set of rtx codes accepted by the
predicate expression EXP, writing the result to CODES.  LOC is
the .md file location of the directive containing EXP.   

References pred_data::codes, compute_test_codes(), did_you_mean_codes, error_at(), exp(), GET_CODE, GET_RTX_NAME, I, i, queue_elem::loc, lookup_predicate(), MATCH_OPERAND, message_at(), N, NUM_RTX_CODE, scan_comma_elt(), TRISTATE_AND, TRISTATE_NOT, TRISTATE_OR, XEXP, XSTR, and Y.

Referenced by add_constraint(), compute_test_codes(), and process_define_predicate().

count_patterns()

int count_patterns ( )

extern

Count the number of patterns in all queues and return the count.   

References count_patterns(), queue_elem::data, define_attr_queue, define_insn_queue, define_pred_queue, get_c_test(), insn_elision, maybe_eval_c_test(), queue_elem::next, and other_queue.

Referenced by count_patterns().

find_optab()

bool find_optab ( optab_pattern * p, const char * name )

extern

Return true if NAME is the name of an optab, describing it in P if so.   

References find_optab(), optab_pattern::m1, optab_pattern::m2, match_pattern(), optab_pattern::name, pred_data::name, optab_def::op, optab_pattern::op, optabs, and optab_pattern::sort_num.

Referenced by find_optab(), gen_expand(), and gen_insn().

get_c_test()

const char * get_c_test ( rtx x )

extern

Return the C test that says whether a definition rtx can be used,
or "" if it can be used unconditionally.   

Return the C test that says whether definition rtx DEF can be used,
or "" if it can be used unconditionally.   

References get_c_test(), GET_CODE, and XSTR.

Referenced by count_patterns(), gen_insn(), get_c_test(), main(), match_pattern_1(), read_md_rtx(), and validate_pattern().

get_emit_function()

const char * get_emit_function ( rtx x )

extern

Return the emit_* function that should be used for pattern X, or NULL
if we can't pick a particular type at compile time and should instead
fall back to "emit".   

References classify_insn(), gcc_unreachable, get_emit_function(), and NULL.

Referenced by get_emit_function().

get_file_location()

file_location get_file_location ( rtx x )

extern

Return the file location of DEFINE_* rtx X, which was previously
returned by read_md_rtx.   

References gcc_assert, get_file_location(), and rtx_locs.

Referenced by def_target_insn(), and get_file_location().

get_num_insn_codes()

unsigned int get_num_insn_codes ( )

extern

Return the number of possible INSN_CODEs.  Only meaningful once the
whole file has been processed.   

References get_num_insn_codes(), and insn_sequence_num.

Referenced by get_num_insn_codes(), and main().

get_pattern_stats()

void get_pattern_stats ( struct pattern_stats * stats, rtvec pattern )

extern

Make STATS describe the operands that appear in instruction pattern
PATTERN.   

References GET_NUM_ELEM, get_pattern_stats(), get_pattern_stats_1(), i, MAX, and RTVEC_ELT.

Referenced by def_target_insn(), gen_expand(), gen_expand(), gen_insn(), gen_insn(), gen_peephole(), gen_split(), get_pattern_stats(), handle_overloaded_gen(), and handle_overloaded_gen().

get_register_filter_id()

unsigned int get_register_filter_id ( const char * filter )

extern

Return the unique identifier for filter condition FILTER.  Identifiers
are assigned automatically when the define_register_constraint is
parsed.   

References gcc_assert, get_register_filter_id(), and register_filter_map.

Referenced by get_register_filter_id(), preprocess_constraints(), write_get_register_filter(), and write_get_register_filter_id().

init_rtx_reader_args()

rtx_reader * init_rtx_reader_args ( int argc, const char ** argv )

extern

Programs that don't have their own options can use this entry point
instead.   

References init_rtx_reader_args(), and init_rtx_reader_args_cb().

Referenced by init_rtx_reader_args(), main(), and main().

init_rtx_reader_args_cb()

rtx_reader * init_rtx_reader_args_cb ( int argc, const char ** argv, bool(* parse_opt )(const char *) )

extern

The entry point for initializing the reader.   

References check_define_attr_duplicates(), cmp_c_test(), condition_table, define_attr_queue, define_cond_exec_queue, define_subst_queue, gen_mnemonic_attr(), gen_reader::gen_reader(), hash_c_test(), have_error, init_predicate_table(), init_rtx_reader_args_cb(), insn_sequence_num, NULL, peephole2_sequence_num, process_define_cond_exec(), process_define_subst(), md_reader::read_md_files(), rtl_obstack, and split_sequence_num.

Referenced by init_rtx_reader_args(), init_rtx_reader_args_cb(), and main().

lookup_predicate()

struct pred_data * lookup_predicate ( const char * name )

extern

References lookup_predicate(), pred_data::name, and predicate_table.

Referenced by compute_test_codes(), lookup_predicate(), mark_mode_tests(), match_pattern_2(), output_operand_data(), special_predicate_operand_p(), subst_pattern_match(), and validate_pattern().

maybe_eval_c_test()

int maybe_eval_c_test ( const char * expr )

extern

If the C test passed as the argument can be evaluated at compile
time, return its truth value; else return -1.  The test must have
appeared somewhere in the machine description when genconditions
was run.   

Given a string representing a C test expression, look it up in the
condition_table and report whether or not its value is known
at compile time.  Returns a tristate: 1 for known true, 0 for
known false, -1 for unknown.   

References condition_table, c_test::expr, maybe_eval_c_test(), and c_test::value.

Referenced by count_patterns(), def_target_insn(), gen_insn(), gen_insn(), gen_insn(), gen_proto(), match_pattern_1(), maybe_eval_c_test(), and read_md_rtx().

open_generator_outputs()

void open_generator_outputs ( vec< generator_output > & outputs )

extern

Open each named file in OUTPUTS.   

References errno, fatal(), fopen, and open_generator_outputs().

Referenced by main(), and open_generator_outputs().

read_md_rtx()

bool read_md_rtx ( md_rtx_info * info )

extern

Try to read a single rtx from the file.  Return true on success,
describing it in *INFO.   

References queue_elem::data, md_rtx_info::def, define_attr_queue, define_insn_queue, define_pred_queue, free(), get_c_test(), GET_CODE, md_rtx_info::index, insn_elision, insn_sequence_num, md_rtx_info::loc, queue_elem::loc, maybe_eval_c_test(), queue_elem::next, NULL, other_queue, peephole2_sequence_num, read_md_rtx(), record_insn_name(), rtx_locs, split_sequence_num, and XSTR.

Referenced by main(), main(), and read_md_rtx().

Variable Documentation

compact_syntax

hash_set<rtx> compact_syntax

extern

List of entries which are part of the new syntax.   

Referenced by convert_syntax(), and gen_insn().

first_predicate

struct pred_data* first_predicate

extern

insn_elision

int insn_elision

extern

Set this to 0 to disable automatic elision of insn patterns which
can never be used in this configuration.  See genconditions.cc.
Must be set before calling init_md_reader.   

Referenced by count_patterns(), main(), and read_md_rtx().

num_dependent_filters

unsigned int num_dependent_filters

extern

Referenced by main(), and process_define_register_constraint().

num_optabs

unsigned int num_optabs

extern

The number of entries in optabs[].   

Referenced by main().

optabs

optab_def optabs[]

extern

An array of all optabs.  Note that the same optab can appear more
than once, with a different pattern.   

Referenced by find_optab(), and main().

register_filters

vec<const char *> register_filters

extern

All register filter conditions, indexed by identifier.   

Referenced by alternative_register_filters(), main(), process_define_register_constraint(), write_get_register_filter(), write_get_register_filter_id(), write_init_reg_class_start_regs(), and write_tm_preds_h().

rtl_obstack

struct obstack* rtl_obstack

extern

Referenced by add_constraint(), attr_rtx_1(), init_rtx_reader_args_cb(), mangle(), optimize_attrs(), simplify_cond(), simplify_test_exp_in_temp(), and write_predicate_subfunction().