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/* Pipeline hazard description translator.
Copyright (C) 2000-2021 Free Software Foundation, Inc.
Written by Vladimir Makarov <vmakarov@redhat.com>
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/>. */
/* References:
1. The finite state automaton based pipeline hazard recognizer and
instruction scheduler in GCC. V. Makarov. Proceedings of GCC
summit, 2003.
2. Detecting pipeline structural hazards quickly. T. Proebsting,
C. Fraser. Proceedings of ACM SIGPLAN-SIGACT Symposium on
Principles of Programming Languages, pages 280--286, 1994.
This article is a good start point to understand usage of finite
state automata for pipeline hazard recognizers. But I'd
recommend the 1st and 3rd article for more deep understanding.
3. Efficient Instruction Scheduling Using Finite State Automata:
V. Bala and N. Rubin, Proceedings of MICRO-28. This is the best
article about usage of finite state automata for pipeline hazard
recognizers.
The current implementation is described in the 1st article and it
is different from the 3rd article in the following:
1. New operator `|' (alternative) is permitted in functional unit
reservation which can be treated deterministically and
non-deterministically.
2. Possibility of usage of nondeterministic automata too.
3. Possibility to query functional unit reservations for given
automaton state.
4. Several constructions to describe impossible reservations
(`exclusion_set', `presence_set', `final_presence_set',
`absence_set', and `final_absence_set').
5. No reverse automata are generated. Trace instruction scheduling
requires this. It can be easily added in the future if we
really need this.
6. Union of automaton states are not generated yet. It is planned
to be implemented. Such feature is needed to make more accurate
interlock insn scheduling to get state describing functional
unit reservation in a joint CFG point. */
/* This file code processes constructions of machine description file
which describes automaton used for recognition of processor pipeline
hazards by insn scheduler and can be used for other tasks (such as
VLIW insn packing.
The translator functions `gen_cpu_unit', `gen_query_cpu_unit',
`gen_bypass', `gen_excl_set', `gen_presence_set',
`gen_final_presence_set', `gen_absence_set',
`gen_final_absence_set', `gen_automaton', `gen_automata_option',
`gen_reserv', `gen_insn_reserv' are called from file
`genattrtab.c'. They transform RTL constructions describing
automata in .md file into internal representation convenient for
further processing.
The translator major function `expand_automata' processes the
description internal representation into finite state automaton.
It can be divided on:
o checking correctness of the automaton pipeline description
(major function is `check_all_description').
o generating automaton (automata) from the description (major
function is `make_automaton').
o optional transformation of nondeterministic finite state
automata into deterministic ones if the alternative operator
`|' is treated nondeterministically in the description (major
function is NDFA_to_DFA).
o optional minimization of the finite state automata by merging
equivalent automaton states (major function is `minimize_DFA').
o forming tables (some as comb vectors) and attributes
representing the automata (functions output_..._table).
Function `write_automata' outputs the created finite state
automaton as different tables and functions which works with the
automata to inquire automaton state and to change its state. These
function are used by gcc instruction scheduler and may be some
other gcc code. */
#include "bconfig.h"
#include "system.h"
#include "coretypes.h"
#include "tm.h"
#include "rtl.h"
#include "obstack.h"
#include "errors.h"
#include "gensupport.h"
#include <math.h>
#include "fnmatch.h"
#ifndef CHAR_BIT
#define CHAR_BIT 8
#endif
/* Positions in machine description file. Now they are not used. But
they could be used in the future for better diagnostic messages. */
typedef int pos_t;
/* The following is element of vector of current (and planned in the
future) functional unit reservations. */
typedef unsigned HOST_WIDE_INT set_el_t;
/* Reservations of function units are represented by value of the following
type. */
typedef set_el_t *reserv_sets_t;
typedef const set_el_t *const_reserv_sets_t;
/* The following structure describes a ticker. */
struct ticker
{
/* The following member value is time of the ticker creation with
taking into account time when the ticker is off. Active time of
the ticker is current time minus the value. */
int modified_creation_time;
/* The following member value is time (incremented by one) when the
ticker was off. Zero value means that now the ticker is on. */
int incremented_off_time;
};
/* The ticker is represented by the following type. */
typedef struct ticker ticker_t;
/* The following type describes elements of output vectors. */
typedef HOST_WIDE_INT vect_el_t;
/* Forward declaration of structures of internal representation of
pipeline description based on NDFA. */
struct unit_decl;
struct bypass_decl;
struct result_decl;
struct automaton_decl;
struct unit_pattern_rel_decl;
struct reserv_decl;
struct insn_reserv_decl;
struct decl;
struct unit_regexp;
struct result_regexp;
struct reserv_regexp;
struct nothing_regexp;
struct sequence_regexp;
struct repeat_regexp;
struct allof_regexp;
struct oneof_regexp;
struct regexp;
struct description;
struct unit_set_el;
struct pattern_set_el;
struct pattern_reserv;
struct state;
struct alt_state;
struct arc;
struct ainsn;
struct automaton;
struct state_ainsn_table;
/* The following typedefs are for brevity. */
typedef struct unit_decl *unit_decl_t;
typedef const struct unit_decl *const_unit_decl_t;
typedef struct decl *decl_t;
typedef const struct decl *const_decl_t;
typedef struct regexp *regexp_t;
typedef struct unit_set_el *unit_set_el_t;
typedef struct pattern_set_el *pattern_set_el_t;
typedef struct pattern_reserv *pattern_reserv_t;
typedef struct alt_state *alt_state_t;
typedef struct state *state_t;
typedef const struct state *const_state_t;
typedef struct arc *arc_t;
typedef struct ainsn *ainsn_t;
typedef struct automaton *automaton_t;
typedef struct automata_list_el *automata_list_el_t;
typedef const struct automata_list_el *const_automata_list_el_t;
typedef struct state_ainsn_table *state_ainsn_table_t;
/* Undefined position. */
static pos_t no_pos = 0;
/* All IR is stored in the following obstack. */
static struct obstack irp;
/* Declare vector types for various data structures: */
typedef vec<vect_el_t> vla_hwint_t;
/* Forward declarations of functions used before their definitions, only. */
static regexp_t gen_regexp_sequence (const char *);
static void reserv_sets_or (reserv_sets_t, reserv_sets_t,
reserv_sets_t);
static reserv_sets_t get_excl_set (reserv_sets_t);
static int check_presence_pattern_sets (reserv_sets_t,
reserv_sets_t, int);
static int check_absence_pattern_sets (reserv_sets_t, reserv_sets_t,
int);
static arc_t first_out_arc (const_state_t);
static arc_t next_out_arc (arc_t);
/* Options with the following names can be set up in automata_option
construction. Because the strings occur more one time we use the
macros. */
#define NO_MINIMIZATION_OPTION "-no-minimization"
#define TIME_OPTION "-time"
#define STATS_OPTION "-stats"
#define V_OPTION "-v"
#define W_OPTION "-w"
#define NDFA_OPTION "-ndfa"
#define COLLAPSE_OPTION "-collapse-ndfa"
#define NO_COMB_OPTION "-no-comb-vect"
#define PROGRESS_OPTION "-progress"
/* The following flags are set up by function `initiate_automaton_gen'. */
/* Make automata with nondeterministic reservation by insns (`-ndfa'). */
static int ndfa_flag;
/* When making an NDFA, produce additional transitions that collapse
NDFA state into a deterministic one suitable for querying CPU units.
Provide advance-state transitions only for deterministic states. */
static int collapse_flag;
/* Do not make minimization of DFA (`-no-minimization'). */
static int no_minimization_flag;
/* Do not try to generate a comb vector (`-no-comb-vect'). */
static int no_comb_flag;
/* Value of this variable is number of automata being generated. The
actual number of automata may be less this value if there is not
sufficient number of units. This value is defined by argument of
option `-split' or by constructions automaton if the value is zero
(it is default value of the argument). */
static int split_argument;
/* Flag of output time statistics (`-time'). */
static int time_flag;
/* Flag of automata statistics (`-stats'). */
static int stats_flag;
/* Flag of creation of description file which contains description of
result automaton and statistics information (`-v'). */
static int v_flag;
/* Flag of output of a progress bar showing how many states were
generated so far for automaton being processed (`-progress'). */
static int progress_flag;
/* Flag of generating warning instead of error for non-critical errors
(`-w'). */
static int w_flag;
/* Output file for pipeline hazard recognizer (PHR) being generated.
The value is NULL if the file is not defined. */
static FILE *output_file;
/* Description file of PHR. The value is NULL if the file is not
created. */
static FILE *output_description_file;
/* PHR description file name. */
static char *output_description_file_name;
/* Value of the following variable is node representing description
being processed. This is start point of IR. */
static struct description *description;
/* This page contains description of IR structure (nodes). */
enum decl_mode
{
dm_unit,
dm_bypass,
dm_automaton,
dm_excl,
dm_presence,
dm_absence,
dm_reserv,
dm_insn_reserv
};
/* This describes define_cpu_unit and define_query_cpu_unit (see file
rtl.def). */
struct unit_decl
{
const char *name;
/* NULL if the automaton name is absent. */
const char *automaton_name;
/* If the following value is not zero, the cpu unit reservation is
described in define_query_cpu_unit. */
char query_p;
/* The following fields are defined by checker. */
/* The following field value is nonzero if the unit is used in an
regexp. */
char unit_is_used;
/* The following field value is order number (0, 1, ...) of given
unit. */
int unit_num;
/* The following field value is corresponding declaration of
automaton which was given in description. If the field value is
NULL then automaton in the unit declaration was absent. */
struct automaton_decl *automaton_decl;
/* The following field value is maximal cycle number (1, ...) on
which given unit occurs in insns. Zero value means that given
unit is not used in insns. */
int max_occ_cycle_num;
/* The following field value is minimal cycle number (0, ...) on
which given unit occurs in insns. -1 value means that given
unit is not used in insns. */
int min_occ_cycle_num;
/* The following list contains units which conflict with given
unit. */
unit_set_el_t excl_list;
/* The following list contains patterns which are required to
reservation of given unit. */
pattern_set_el_t presence_list;
pattern_set_el_t final_presence_list;
/* The following list contains patterns which should be not present
in reservation for given unit. */
pattern_set_el_t absence_list;
pattern_set_el_t final_absence_list;
/* The following is used only when `query_p' has nonzero value.
This is query number for the unit. */
int query_num;
/* The following is the last cycle on which the unit was checked for
correct distributions of units to automata in a regexp. */
int last_distribution_check_cycle;
/* The following fields are defined by automaton generator. */
/* The following field value is number of the automaton to which
given unit belongs. */
int corresponding_automaton_num;
/* If the following value is not zero, the cpu unit is present in a
`exclusion_set' or in right part of a `presence_set',
`final_presence_set', `absence_set', and
`final_absence_set'define_query_cpu_unit. */
char in_set_p;
};
/* This describes define_bypass (see file rtl.def). */
struct bypass_decl
{
int latency;
const char *out_pattern;
const char *in_pattern;
const char *bypass_guard_name;
/* The following fields are defined by checker. */
/* output and input insns of given bypass. */
struct insn_reserv_decl *out_insn_reserv;
struct insn_reserv_decl *in_insn_reserv;
/* The next bypass for given output insn. */
struct bypass_decl *next;
};
/* This describes define_automaton (see file rtl.def). */
struct automaton_decl
{
const char *name;
/* The following fields are defined by automaton generator. */
/* The following field value is nonzero if the automaton is used in
an regexp definition. */
char automaton_is_used;
/* The following fields are defined by checker. */
/* The following field value is the corresponding automaton. This
field is not NULL only if the automaton is present in unit
declarations and the automatic partition on automata is not
used. */
automaton_t corresponding_automaton;
};
/* This describes exclusion relations: exclusion_set (see file
rtl.def). */
struct excl_rel_decl
{
int all_names_num;
int first_list_length;
char *names [1];
};
/* This describes unit relations: [final_]presence_set or
[final_]absence_set (see file rtl.def). */
struct unit_pattern_rel_decl
{
int final_p;
int names_num;
int patterns_num;
char **names;
char ***patterns;
};
/* This describes define_reservation (see file rtl.def). */
struct reserv_decl
{
const char *name;
regexp_t regexp;
/* The following fields are defined by checker. */
/* The following field value is nonzero if the unit is used in an
regexp. */
char reserv_is_used;
/* The following field is used to check up cycle in expression
definition. */
int loop_pass_num;
};
/* This describes define_insn_reservation (see file rtl.def). */
struct insn_reserv_decl
{
rtx condexp;
int default_latency;
regexp_t regexp;
const char *name;
/* The following fields are defined by checker. */
/* The following field value is order number (0, 1, ...) of given
insn. */
int insn_num;
/* The following field value is list of bypasses in which given insn
is output insn. Bypasses with the same input insn stay one after
another in the list in the same order as their occurrences in the
description but the bypass without a guard stays always the last
in a row of bypasses with the same input insn. */
struct bypass_decl *bypass_list;
/* The following fields are defined by automaton generator. */
/* The following field is the insn regexp transformed that
the regexp has not optional regexp, repetition regexp, and an
reservation name (i.e. reservation identifiers are changed by the
corresponding regexp) and all alternations are the top level
of the regexp. The value can be NULL only if it is special
insn `cycle advancing'. */
regexp_t transformed_regexp;
/* The following field value is list of arcs marked given
insn. The field is used in transformation NDFA -> DFA. */
arc_t arcs_marked_by_insn;
/* The two following fields are used during minimization of a finite state
automaton. */
/* The field value is number of equivalence class of state into
which arc marked by given insn enters from a state (fixed during
an automaton minimization). */
int equiv_class_num;
/* The following member value is the list to automata which can be
changed by the insn issue. */
automata_list_el_t important_automata_list;
/* The following member is used to process insn once for output. */
int processed_p;
};
/* This contains a declaration mentioned above. */
struct decl
{
/* What node in the union? */
enum decl_mode mode;
pos_t pos;
union
{
struct unit_decl unit;
struct bypass_decl bypass;
struct automaton_decl automaton;
struct excl_rel_decl excl;
struct unit_pattern_rel_decl presence;
struct unit_pattern_rel_decl absence;
struct reserv_decl reserv;
struct insn_reserv_decl insn_reserv;
} decl;
};
/* The following structures represent parsed reservation strings. */
enum regexp_mode
{
rm_unit,
rm_reserv,
rm_nothing,
rm_sequence,
rm_repeat,
rm_allof,
rm_oneof
};
/* Cpu unit in reservation. */
struct unit_regexp
{
const char *name;
unit_decl_t unit_decl;
};
/* Define_reservation in a reservation. */
struct reserv_regexp
{
const char *name;
struct reserv_decl *reserv_decl;
};
/* Absence of reservation (represented by string `nothing'). */
struct nothing_regexp
{
/* This used to be empty but ISO C doesn't allow that. */
char unused;
};
/* Representation of reservations separated by ',' (see file
rtl.def). */
struct sequence_regexp
{
int regexps_num;
regexp_t regexps [1];
};
/* Representation of construction `repeat' (see file rtl.def). */
struct repeat_regexp
{
int repeat_num;
regexp_t regexp;
};
/* Representation of reservations separated by '+' (see file
rtl.def). */
struct allof_regexp
{
int regexps_num;
regexp_t regexps [1];
};
/* Representation of reservations separated by '|' (see file
rtl.def). */
struct oneof_regexp
{
int regexps_num;
regexp_t regexps [1];
};
/* Representation of a reservation string. */
struct regexp
{
/* What node in the union? */
enum regexp_mode mode;
pos_t pos;
union
{
struct unit_regexp unit;
struct reserv_regexp reserv;
struct nothing_regexp nothing;
struct sequence_regexp sequence;
struct repeat_regexp repeat;
struct allof_regexp allof;
struct oneof_regexp oneof;
} regexp;
};
/* Represents description of pipeline hazard description based on
NDFA. */
struct description
{
int decls_num, normal_decls_num;
/* The following fields are defined by checker. */
/* The following fields values are correspondingly number of all
units, query units, and insns in the description. */
int units_num;
int query_units_num;
int insns_num;
/* The following field value is max length (in cycles) of
reservations of insns. The field value is defined only for
correct programs. */
int max_insn_reserv_cycles;
/* The following fields are defined by automaton generator. */
/* The following field value is the first automaton. */
automaton_t first_automaton;
/* The following field is created by pipeline hazard parser and
contains all declarations. We allocate additional entries for
two special insns which are added by the automaton generator. */
decl_t decls [1];
};
/* The following nodes are created in automaton checker. */
/* The following nodes represent exclusion set for cpu units. Each
element is accessed through only one excl_list. */
struct unit_set_el
{
unit_decl_t unit_decl;
unit_set_el_t next_unit_set_el;
};
/* The following nodes represent presence or absence pattern for cpu
units. Each element is accessed through only one presence_list or
absence_list. */
struct pattern_set_el
{
/* The number of units in unit_decls. */
int units_num;
/* The units forming the pattern. */
struct unit_decl **unit_decls;
pattern_set_el_t next_pattern_set_el;
};
/* The following nodes are created in automaton generator. */
/* The following nodes represent presence or absence pattern for cpu
units. Each element is accessed through only one element of
unit_presence_set_table or unit_absence_set_table. */
struct pattern_reserv
{
reserv_sets_t reserv;
pattern_reserv_t next_pattern_reserv;
};
/* The following node type describes state automaton. The state may
be deterministic or non-deterministic. Non-deterministic state has
several component states which represent alternative cpu units
reservations. The state also is used for describing a
deterministic reservation of automaton insn. */
struct state
{
/* The following member value is nonzero if there is a transition by
cycle advancing. */
int new_cycle_p;
/* The following field is list of processor unit reservations on
each cycle. */
reserv_sets_t reservs;
/* The following field is unique number of given state between other
states. */
int unique_num;
/* The following field value is automaton to which given state
belongs. */
automaton_t automaton;
/* The following field value is the first arc output from given
state. */
arc_t first_out_arc;
unsigned int num_out_arcs;
/* The following field is used to form NDFA. */
char it_was_placed_in_stack_for_NDFA_forming;
/* The following field is used to form DFA. */
char it_was_placed_in_stack_for_DFA_forming;
/* The following field is used to transform NDFA to DFA and DFA
minimization. The field value is not NULL if the state is a
compound state. In this case the value of field `unit_sets_list'
is NULL. All states in the list are in the hash table. The list
is formed through field `next_sorted_alt_state'. We should
support only one level of nesting state. */
alt_state_t component_states;
/* The following field is used for passing graph of states. */
int pass_num;
/* The list of states belonging to one equivalence class is formed
with the aid of the following field. */
state_t next_equiv_class_state;
/* The two following fields are used during minimization of a finite
state automaton. */
int equiv_class_num_1, equiv_class_num_2;
/* The following field is used during minimization of a finite state
automaton. The field value is state corresponding to equivalence
class to which given state belongs. */
state_t equiv_class_state;
unsigned int *presence_signature;
/* The following field value is the order number of given state.
The states in final DFA is enumerated with the aid of the
following field. */
int order_state_num;
/* This member is used for passing states for searching minimal
delay time. */
int state_pass_num;
/* The following member is used to evaluate min issue delay of insn
for a state. */
int min_insn_issue_delay;
};
/* Automaton arc. */
struct arc
{
/* The following field refers for the state into which given arc
enters. */
state_t to_state;
/* The following field describes that the insn issue (with cycle
advancing for special insn `cycle advancing' and without cycle
advancing for others) makes transition from given state to
another given state. */
ainsn_t insn;
/* The following field value is the next arc output from the same
state. */
arc_t next_out_arc;
/* List of arcs marked given insn is formed with the following
field. The field is used in transformation NDFA -> DFA. */
arc_t next_arc_marked_by_insn;
};
/* The following node type describes a deterministic alternative in
non-deterministic state which characterizes cpu unit reservations
of automaton insn or which is part of NDFA. */
struct alt_state
{
/* The following field is a deterministic state which characterizes
unit reservations of the instruction. */
state_t state;
/* The following field refers to the next state which characterizes
unit reservations of the instruction. */
alt_state_t next_alt_state;
/* The following field refers to the next state in sorted list. */
alt_state_t next_sorted_alt_state;
};
/* The following node type describes insn of automaton. They are
labels of FA arcs. */
struct ainsn
{
/* The following field value is the corresponding insn declaration
of description. */
struct insn_reserv_decl *insn_reserv_decl;
/* The following field value is the next insn declaration for an
automaton. */
ainsn_t next_ainsn;
/* The following field is states which characterize automaton unit
reservations of the instruction. The value can be NULL only if it
is special insn `cycle advancing'. */
alt_state_t alt_states;
/* The following field is sorted list of states which characterize
automaton unit reservations of the instruction. The value can be
NULL only if it is special insn `cycle advancing'. */
alt_state_t sorted_alt_states;
/* The following field refers the next automaton insn with
the same reservations. */
ainsn_t next_same_reservs_insn;
/* The following field is flag of the first automaton insn with the
same reservations in the declaration list. Only arcs marked such
insn is present in the automaton. This significantly decreases
memory requirements especially when several automata are
formed. */
char first_insn_with_same_reservs;
/* The following member has nonzero value if there is arc from state of
the automaton marked by the ainsn. */
char arc_exists_p;
/* Cyclic list of insns of an equivalence class is formed with the
aid of the following field. */
ainsn_t next_equiv_class_insn;
/* The following field value is nonzero if the insn declaration is
the first insn declaration with given equivalence number. */
char first_ainsn_with_given_equivalence_num;
/* The following field is number of class of equivalence of insns.
It is necessary because many insns may be equivalent with the
point of view of pipeline hazards. */
int insn_equiv_class_num;
/* The following member value is TRUE if there is an arc in the
automaton marked by the insn into another state. In other
words, the insn can change the state of the automaton. */
int important_p;
};
/* The following describes an automaton for PHR. */
struct automaton
{
/* The following field value is the list of insn declarations for
given automaton. */
ainsn_t ainsn_list;
/* Pointers to the ainsns corresponding to the special reservations. */
ainsn_t advance_ainsn, collapse_ainsn;
/* The following field value is the corresponding automaton
declaration. This field is not NULL only if the automatic
partition on automata is not used. */
struct automaton_decl *corresponding_automaton_decl;
/* The following field value is the next automaton. */
automaton_t next_automaton;
/* The following field is start state of FA. There are not unit
reservations in the state. */
state_t start_state;
/* The following field value is number of equivalence classes of
insns (see field `insn_equiv_class_num' in
`insn_reserv_decl'). */
int insn_equiv_classes_num;
/* The following field value is number of states of final DFA. */
int achieved_states_num;
/* The following field value is the order number (0, 1, ...) of
given automaton. */
int automaton_order_num;
/* The following fields contain statistics information about
building automaton. */
int NDFA_states_num, DFA_states_num;
/* The following field value is defined only if minimization of DFA
is used. */
int minimal_DFA_states_num;
int NDFA_arcs_num, DFA_arcs_num;
/* The following field value is defined only if minimization of DFA
is used. */
int minimal_DFA_arcs_num;
/* The following member refers for two table state x ainsn -> int.
??? Above sentence is incomprehensible. */
state_ainsn_table_t trans_table;
/* The following member value is maximal value of min issue delay
for insns of the automaton. */
int max_min_delay;
/* Usually min issue delay is small and we can place several (2, 4,
8) elements in one vector element. So the compression factor can
be 1 (no compression), 2, 4, 8. */
int min_issue_delay_table_compression_factor;
/* Total number of locked states in this automaton. */
int locked_states;
};
/* The following is the element of the list of automata. */
struct automata_list_el
{
/* The automaton itself. */
automaton_t automaton;
/* The next automata set element. */
automata_list_el_t next_automata_list_el;
};
/* The following structure describes a table state X ainsn -> int(>= 0). */
struct state_ainsn_table
{
/* Automaton to which given table belongs. */
automaton_t automaton;
/* The following tree vectors for comb vector implementation of the
table. */
vla_hwint_t comb_vect;
vla_hwint_t check_vect;
vla_hwint_t base_vect;
/* This is simple implementation of the table. */
vla_hwint_t full_vect;
/* Minimal and maximal values of the previous vectors. */
int min_comb_vect_el_value, max_comb_vect_el_value;
int min_base_vect_el_value, max_base_vect_el_value;
};
/* Macros to access members of unions. Use only them for access to
union members of declarations and regexps. */
#if CHECKING_P && (GCC_VERSION >= 2007)
#define DECL_UNIT(d) __extension__ \
(({ __typeof (d) const _decl = (d); \
if (_decl->mode != dm_unit) \
decl_mode_check_failed (_decl->mode, "dm_unit", \
__FILE__, __LINE__, __FUNCTION__); \
&(_decl)->decl.unit; }))
#define DECL_BYPASS(d) __extension__ \
(({ __typeof (d) const _decl = (d); \
if (_decl->mode != dm_bypass) \
decl_mode_check_failed (_decl->mode, "dm_bypass", \
__FILE__, __LINE__, __FUNCTION__); \
&(_decl)->decl.bypass; }))
#define DECL_AUTOMATON(d) __extension__ \
(({ __typeof (d) const _decl = (d); \
if (_decl->mode != dm_automaton) \
decl_mode_check_failed (_decl->mode, "dm_automaton", \
__FILE__, __LINE__, __FUNCTION__); \
&(_decl)->decl.automaton; }))
#define DECL_EXCL(d) __extension__ \
(({ __typeof (d) const _decl = (d); \
if (_decl->mode != dm_excl) \
decl_mode_check_failed (_decl->mode, "dm_excl", \
__FILE__, __LINE__, __FUNCTION__); \
&(_decl)->decl.excl; }))
#define DECL_PRESENCE(d) __extension__ \
(({ __typeof (d) const _decl = (d); \
if (_decl->mode != dm_presence) \
decl_mode_check_failed (_decl->mode, "dm_presence", \
__FILE__, __LINE__, __FUNCTION__); \
&(_decl)->decl.presence; }))
#define DECL_ABSENCE(d) __extension__ \
(({ __typeof (d) const _decl = (d); \
if (_decl->mode != dm_absence) \
decl_mode_check_failed (_decl->mode, "dm_absence", \
__FILE__, __LINE__, __FUNCTION__); \
&(_decl)->decl.absence; }))
#define DECL_RESERV(d) __extension__ \
(({ __typeof (d) const _decl = (d); \
if (_decl->mode != dm_reserv) \
decl_mode_check_failed (_decl->mode, "dm_reserv", \
__FILE__, __LINE__, __FUNCTION__); \
&(_decl)->decl.reserv; }))
#define DECL_INSN_RESERV(d) __extension__ \
(({ __typeof (d) const _decl = (d); \
if (_decl->mode != dm_insn_reserv) \
decl_mode_check_failed (_decl->mode, "dm_insn_reserv", \
__FILE__, __LINE__, __FUNCTION__); \
&(_decl)->decl.insn_reserv; }))
static const char *decl_name (enum decl_mode);
static void decl_mode_check_failed (enum decl_mode, const char *,
const char *, int, const char *)
ATTRIBUTE_NORETURN;
/* Return string representation of declaration mode MODE. */
static const char *
decl_name (enum decl_mode mode)
{
static char str [100];
if (mode == dm_unit)
return "dm_unit";
else if (mode == dm_bypass)
return "dm_bypass";
else if (mode == dm_automaton)
return "dm_automaton";
else if (mode == dm_excl)
return "dm_excl";
else if (mode == dm_presence)
return "dm_presence";
else if (mode == dm_absence)
return "dm_absence";
else if (mode == dm_reserv)
return "dm_reserv";
else if (mode == dm_insn_reserv)
return "dm_insn_reserv";
else
sprintf (str, "unknown (%d)", (int) mode);
return str;
}
/* The function prints message about unexpected declaration and finish
the program. */
static void
decl_mode_check_failed (enum decl_mode mode, const char *expected_mode_str,
const char *file, int line, const char *func)
{
fprintf
(stderr,
"\n%s: %d: error in %s: DECL check: expected decl %s, have %s\n",
file, line, func, expected_mode_str, decl_name (mode));
exit (1);
}
#define REGEXP_UNIT(r) __extension__ \
(({ struct regexp *const _regexp = (r); \
if (_regexp->mode != rm_unit) \
regexp_mode_check_failed (_regexp->mode, "rm_unit", \
__FILE__, __LINE__, __FUNCTION__); \
&(_regexp)->regexp.unit; }))
#define REGEXP_RESERV(r) __extension__ \
(({ struct regexp *const _regexp = (r); \
if (_regexp->mode != rm_reserv) \
regexp_mode_check_failed (_regexp->mode, "rm_reserv", \
__FILE__, __LINE__, __FUNCTION__); \
&(_regexp)->regexp.reserv; }))
#define REGEXP_SEQUENCE(r) __extension__ \
(({ struct regexp *const _regexp = (r); \
if (_regexp->mode != rm_sequence) \
regexp_mode_check_failed (_regexp->mode, "rm_sequence", \
__FILE__, __LINE__, __FUNCTION__); \
&(_regexp)->regexp.sequence; }))
#define REGEXP_REPEAT(r) __extension__ \
(({ struct regexp *const _regexp = (r); \
if (_regexp->mode != rm_repeat) \
regexp_mode_check_failed (_regexp->mode, "rm_repeat", \
__FILE__, __LINE__, __FUNCTION__); \
&(_regexp)->regexp.repeat; }))
#define REGEXP_ALLOF(r) __extension__ \
(({ struct regexp *const _regexp = (r); \
if (_regexp->mode != rm_allof) \
regexp_mode_check_failed (_regexp->mode, "rm_allof", \
__FILE__, __LINE__, __FUNCTION__); \
&(_regexp)->regexp.allof; }))
#define REGEXP_ONEOF(r) __extension__ \
(({ struct regexp *const _regexp = (r); \
if (_regexp->mode != rm_oneof) \
regexp_mode_check_failed (_regexp->mode, "rm_oneof", \
__FILE__, __LINE__, __FUNCTION__); \
&(_regexp)->regexp.oneof; }))
static const char *regexp_name (enum regexp_mode);
static void regexp_mode_check_failed (enum regexp_mode, const char *,
const char *, int,
const char *) ATTRIBUTE_NORETURN;
/* Return string representation of regexp mode MODE. */
static const char *
regexp_name (enum regexp_mode mode)
{
switch (mode)
{
case rm_unit:
return "rm_unit";
case rm_reserv:
return "rm_reserv";
case rm_nothing:
return "rm_nothing";
case rm_sequence:
return "rm_sequence";
case rm_repeat:
return "rm_repeat";
case rm_allof:
return "rm_allof";
case rm_oneof:
return "rm_oneof";
default:
gcc_unreachable ();
}
}
/* The function prints message about unexpected regexp and finish the
program. */
static void
regexp_mode_check_failed (enum regexp_mode mode,
const char *expected_mode_str,
const char *file, int line, const char *func)
{
fprintf
(stderr,
"\n%s: %d: error in %s: REGEXP check: expected decl %s, have %s\n",
file, line, func, expected_mode_str, regexp_name (mode));
exit (1);
}
#else /* #if CHECKING_P && (GCC_VERSION >= 2007) */
#define DECL_UNIT(d) (&(d)->decl.unit)
#define DECL_BYPASS(d) (&(d)->decl.bypass)
#define DECL_AUTOMATON(d) (&(d)->decl.automaton)
#define DECL_EXCL(d) (&(d)->decl.excl)
#define DECL_PRESENCE(d) (&(d)->decl.presence)
#define DECL_ABSENCE(d) (&(d)->decl.absence)
#define DECL_RESERV(d) (&(d)->decl.reserv)
#define DECL_INSN_RESERV(d) (&(d)->decl.insn_reserv)
#define REGEXP_UNIT(r) (&(r)->regexp.unit)
#define REGEXP_RESERV(r) (&(r)->regexp.reserv)
#define REGEXP_SEQUENCE(r) (&(r)->regexp.sequence)
#define REGEXP_REPEAT(r) (&(r)->regexp.repeat)
#define REGEXP_ALLOF(r) (&(r)->regexp.allof)
#define REGEXP_ONEOF(r) (&(r)->regexp.oneof)
#endif /* #if CHECKING_P && (GCC_VERSION >= 2007) */
#define XCREATENODE(T) ((T *) create_node (sizeof (T)))
#define XCREATENODEVEC(T, N) ((T *) create_node (sizeof (T) * (N)))
#define XCREATENODEVAR(T, S) ((T *) create_node ((S)))
#define XCOPYNODE(T, P) ((T *) copy_node ((P), sizeof (T)))
#define XCOPYNODEVEC(T, P, N) ((T *) copy_node ((P), sizeof (T) * (N)))
#define XCOPYNODEVAR(T, P, S) ((T *) copy_node ((P), (S)))
/* Create IR structure (node). */
static void *
create_node (size_t size)
{
void *result;
obstack_blank (&irp, size);
result = obstack_base (&irp);
obstack_finish (&irp);
/* Default values of members are NULL and zero. */
memset (result, 0, size);
return result;
}
/* Copy IR structure (node). */
static void *
copy_node (const void *from, size_t size)
{
void *const result = create_node (size);
memcpy (result, from, size);
return result;
}
/* The function checks that NAME does not contain quotes (`"'). */
static const char *
check_name (const char * name, pos_t pos ATTRIBUTE_UNUSED)
{
const char *str;
for (str = name; *str != '\0'; str++)
if (*str == '\"')
error ("Name `%s' contains quotes", name);
return name;
}
/* Pointers to all declarations during IR generation are stored in the
following. */
static vec<decl_t> decls;
/* Given a pointer to a (char *) and a separator, return an alloc'ed
string containing the next separated element, taking parentheses
into account if PAR_FLAG has nonzero value. Advance the pointer to
after the string scanned, or the end-of-string. Return NULL if at
end of string. */
static char *
next_sep_el (const char **pstr, int sep, int par_flag)
{
char *out_str;
const char *p;
int pars_num;
int n_spaces;
/* Remove leading whitespaces. */
while (ISSPACE ((int) **pstr))
(*pstr)++;
if (**pstr == '\0')
return NULL;
n_spaces = 0;
for (pars_num = 0, p = *pstr; *p != '\0'; p++)
{
if (par_flag && *p == '(')
pars_num++;
else if (par_flag && *p == ')')
pars_num--;
else if (pars_num == 0 && *p == sep)
break;
if (pars_num == 0 && ISSPACE ((int) *p))
n_spaces++;
else
{
for (; n_spaces != 0; n_spaces--)
obstack_1grow (&irp, p [-n_spaces]);
obstack_1grow (&irp, *p);
}
}
obstack_1grow (&irp, '\0');
out_str = (char *) obstack_base (&irp);
obstack_finish (&irp);
*pstr = p;
if (**pstr == sep)
(*pstr)++;
return out_str;
}
/* Given a string and a separator, return the number of separated
elements in it, taking parentheses into account if PAR_FLAG has
nonzero value. Return 0 for the null string, -1 if parentheses is
not balanced. */
static int
n_sep_els (const char *s, int sep, int par_flag)
{
int n;
int pars_num;
if (*s == '\0')
return 0;
for (pars_num = 0, n = 1; *s; s++)
if (par_flag && *s == '(')
pars_num++;
else if (par_flag && *s == ')')
pars_num--;
else if (pars_num == 0 && *s == sep)
n++;
return (pars_num != 0 ? -1 : n);
}
/* Given a string and a separator, return vector of strings which are
elements in the string and number of elements through els_num.
Take parentheses into account if PAREN_P has nonzero value. The
function also inserts the end marker NULL at the end of vector.
Return 0 for the null string, -1 if parentheses are not balanced. */
static char **
get_str_vect (const char *str, int *els_num, int sep, int paren_p)
{
int i;
char **vect;
const char **pstr;
char *trail;
*els_num = n_sep_els (str, sep, paren_p);
if (*els_num <= 0)
return NULL;
obstack_blank (&irp, sizeof (char *) * (*els_num + 1));
vect = (char **) obstack_base (&irp);
obstack_finish (&irp);
pstr = &str;
for (i = 0; i < *els_num; i++)
vect [i] = next_sep_el (pstr, sep, paren_p);
trail = next_sep_el (pstr, sep, paren_p);
gcc_assert (!trail);
vect [i] = NULL;
return vect;
}
/* Process a DEFINE_CPU_UNIT.
This gives information about a unit contained in CPU. We fill a
struct unit_decl with information used later by `expand_automata'. */
static void
gen_cpu_unit (md_rtx_info *info)
{
decl_t decl;
char **str_cpu_units;
int vect_length;
int i;
rtx def = info->def;
str_cpu_units = get_str_vect (XSTR (def, 0), &vect_length, ',', FALSE);
if (str_cpu_units == NULL)
fatal_at (info->loc, "invalid string `%s' in %s",
XSTR (def, 0), GET_RTX_NAME (GET_CODE (def)));
for (i = 0; i < vect_length; i++)
{
decl = XCREATENODE (struct decl);
decl->mode = dm_unit;
decl->pos = 0;
DECL_UNIT (decl)->name = check_name (str_cpu_units [i], decl->pos);
DECL_UNIT (decl)->automaton_name = XSTR (def, 1);
DECL_UNIT (decl)->query_p = 0;
DECL_UNIT (decl)->min_occ_cycle_num = -1;
DECL_UNIT (decl)->in_set_p = 0;
decls.safe_push (decl);
}
}
/* Process a DEFINE_QUERY_CPU_UNIT.
This gives information about a unit contained in CPU. We fill a
struct unit_decl with information used later by `expand_automata'. */
static void
gen_query_cpu_unit (md_rtx_info *info)
{
decl_t decl;
char **str_cpu_units;
int vect_length;
int i;
rtx def = info->def;
str_cpu_units = get_str_vect (XSTR (def, 0), &vect_length, ',',
FALSE);
if (str_cpu_units == NULL)
fatal_at (info->loc, "invalid string `%s' in %s",
XSTR (def, 0), GET_RTX_NAME (GET_CODE (def)));
for (i = 0; i < vect_length; i++)
{
decl = XCREATENODE (struct decl);
decl->mode = dm_unit;
decl->pos = 0;
DECL_UNIT (decl)->name = check_name (str_cpu_units [i], decl->pos);
DECL_UNIT (decl)->automaton_name = XSTR (def, 1);
DECL_UNIT (decl)->query_p = 1;
decls.safe_push (decl);
}
}
/* Process a DEFINE_BYPASS.
This gives information about a unit contained in the CPU. We fill
in a struct bypass_decl with information used later by
`expand_automata'. */
static void
gen_bypass (md_rtx_info *info)
{
decl_t decl;
char **out_patterns;
int out_length;
char **in_patterns;
int in_length;
int i, j;
rtx def = info->def;
out_patterns = get_str_vect (XSTR (def, 1), &out_length, ',', FALSE);
if (out_patterns == NULL)
fatal_at (info->loc, "invalid string `%s' in %s",
XSTR (def, 1), GET_RTX_NAME (GET_CODE (def)));
in_patterns = get_str_vect (XSTR (def, 2), &in_length, ',', FALSE);
if (in_patterns == NULL)
fatal_at (info->loc, "invalid string `%s' in %s",
XSTR (def, 2), GET_RTX_NAME (GET_CODE (def)));
for (i = 0; i < out_length; i++)
for (j = 0; j < in_length; j++)
{
decl = XCREATENODE (struct decl);
decl->mode = dm_bypass;
decl->pos = 0;
DECL_BYPASS (decl)->latency = XINT (def, 0);
DECL_BYPASS (decl)->out_pattern = out_patterns[i];
DECL_BYPASS (decl)->in_pattern = in_patterns[j];
DECL_BYPASS (decl)->bypass_guard_name = XSTR (def, 3);
decls.safe_push (decl);
}
}
/* Process an EXCLUSION_SET.
This gives information about a cpu unit conflicts. We fill a
struct excl_rel_decl (excl) with information used later by
`expand_automata'. */
static void
gen_excl_set (md_rtx_info *info)
{
decl_t decl;
char **first_str_cpu_units;
char **second_str_cpu_units;
int first_vect_length;
int length;
int i;
rtx def = info->def;
first_str_cpu_units
= get_str_vect (XSTR (def, 0), &first_vect_length, ',', FALSE);
if (first_str_cpu_units == NULL)
fatal_at (info->loc, "invalid string `%s' in %s",
XSTR (def, 0), GET_RTX_NAME (GET_CODE (def)));
second_str_cpu_units = get_str_vect (XSTR (def, 1), &length, ',',
FALSE);
if (second_str_cpu_units == NULL)
fatal_at (info->loc, "invalid string `%s' in %s",
XSTR (def, 1), GET_RTX_NAME (GET_CODE (def)));
length += first_vect_length;
decl = XCREATENODEVAR (struct decl, (sizeof (struct decl)
+ (length - 1) * sizeof (char *)));
decl->mode = dm_excl;
decl->pos = 0;
DECL_EXCL (decl)->all_names_num = length;
DECL_EXCL (decl)->first_list_length = first_vect_length;
for (i = 0; i < length; i++)
if (i < first_vect_length)
DECL_EXCL (decl)->names [i] = first_str_cpu_units [i];
else
DECL_EXCL (decl)->names [i]
= second_str_cpu_units [i - first_vect_length];
decls.safe_push (decl);
}
/* Process a PRESENCE_SET, a FINAL_PRESENCE_SET, an ABSENCE_SET,
FINAL_ABSENCE_SET (it is depended on PRESENCE_P and FINAL_P).
This gives information about a cpu unit reservation requirements.
We fill a struct unit_pattern_rel_decl with information used later
by `expand_automata'. */
static void
gen_presence_absence_set (md_rtx_info *info, int presence_p, int final_p)
{
decl_t decl;
char **str_cpu_units;
char **str_pattern_lists;
char ***str_patterns;
int cpu_units_length;
int length;
int patterns_length;
int i;
rtx def = info->def;
str_cpu_units = get_str_vect (XSTR (def, 0), &cpu_units_length, ',',
FALSE);
if (str_cpu_units == NULL)
fatal_at (info->loc, "invalid string `%s' in %s",
XSTR (def, 0), GET_RTX_NAME (GET_CODE (def)));
str_pattern_lists = get_str_vect (XSTR (def, 1),
&patterns_length, ',', FALSE);
if (str_pattern_lists == NULL)
fatal_at (info->loc, "invalid string `%s' in %s",
XSTR (def, 1), GET_RTX_NAME (GET_CODE (def)));
str_patterns = XOBNEWVEC (&irp, char **, patterns_length);
for (i = 0; i < patterns_length; i++)
{
str_patterns [i] = get_str_vect (str_pattern_lists [i],
&length, ' ', FALSE);
gcc_assert (str_patterns [i]);
}
decl = XCREATENODE (struct decl);
decl->pos = 0;
if (presence_p)
{
decl->mode = dm_presence;
DECL_PRESENCE (decl)->names_num = cpu_units_length;
DECL_PRESENCE (decl)->names = str_cpu_units;
DECL_PRESENCE (decl)->patterns = str_patterns;
DECL_PRESENCE (decl)->patterns_num = patterns_length;
DECL_PRESENCE (decl)->final_p = final_p;
}
else
{
decl->mode = dm_absence;
DECL_ABSENCE (decl)->names_num = cpu_units_length;
DECL_ABSENCE (decl)->names = str_cpu_units;
DECL_ABSENCE (decl)->patterns = str_patterns;
DECL_ABSENCE (decl)->patterns_num = patterns_length;
DECL_ABSENCE (decl)->final_p = final_p;
}
decls.safe_push (decl);
}
/* Process a PRESENCE_SET.
This gives information about a cpu unit reservation requirements.
We fill a struct unit_pattern_rel_decl (presence) with information
used later by `expand_automata'. */
static void
gen_presence_set (md_rtx_info *info)
{
gen_presence_absence_set (info, TRUE, FALSE);
}
/* Process a FINAL_PRESENCE_SET.
This gives information about a cpu unit reservation requirements.
We fill a struct unit_pattern_rel_decl (presence) with information
used later by `expand_automata'. */
static void
gen_final_presence_set (md_rtx_info *info)
{
gen_presence_absence_set (info, TRUE, TRUE);
}
/* Process an ABSENCE_SET.
This gives information about a cpu unit reservation requirements.
We fill a struct unit_pattern_rel_decl (absence) with information
used later by `expand_automata'. */
static void
gen_absence_set (md_rtx_info *info)
{
gen_presence_absence_set (info, FALSE, FALSE);
}
/* Process a FINAL_ABSENCE_SET.
This gives information about a cpu unit reservation requirements.
We fill a struct unit_pattern_rel_decl (absence) with information
used later by `expand_automata'. */
static void
gen_final_absence_set (md_rtx_info *info)
{
gen_presence_absence_set (info, FALSE, TRUE);
}
/* Process a DEFINE_AUTOMATON.
This gives information about a finite state automaton used for
recognizing pipeline hazards. We fill a struct automaton_decl
with information used later by `expand_automata'. */
static void
gen_automaton (md_rtx_info *info)
{
decl_t decl;
char **str_automata;
int vect_length;
int i;
rtx def = info->def;
str_automata = get_str_vect (XSTR (def, 0), &vect_length, ',', FALSE);
if (str_automata == NULL)
fatal_at (info->loc, "invalid string `%s' in %s",
XSTR (def, 0), GET_RTX_NAME (GET_CODE (def)));
for (i = 0; i < vect_length; i++)
{
decl = XCREATENODE (struct decl);
decl->mode = dm_automaton;
decl->pos = 0;
DECL_AUTOMATON (decl)->name = check_name (str_automata [i], decl->pos);
decls.safe_push (decl);
}
}
/* Process an AUTOMATA_OPTION.
This gives information how to generate finite state automaton used
for recognizing pipeline hazards. */
static void
gen_automata_option (md_rtx_info *info)
{
const char *option = XSTR (info->def, 0);
if (strcmp (option, NO_MINIMIZATION_OPTION + 1) == 0)
no_minimization_flag = 1;
else if (strcmp (option, TIME_OPTION + 1) == 0)
time_flag = 1;
else if (strcmp (option, STATS_OPTION + 1) == 0)
stats_flag = 1;
else if (strcmp (option, V_OPTION + 1) == 0)
v_flag = 1;
else if (strcmp (option, W_OPTION + 1) == 0)
w_flag = 1;
else if (strcmp (option, NDFA_OPTION + 1) == 0)
ndfa_flag = 1;
else if (strcmp (option, COLLAPSE_OPTION + 1) == 0)
collapse_flag = 1;
else if (strcmp (option, NO_COMB_OPTION + 1) == 0)
no_comb_flag = 1;
else if (strcmp (option, PROGRESS_OPTION + 1) == 0)
progress_flag = 1;
else
fatal_at (info->loc, "invalid option `%s' in %s",
option, GET_RTX_NAME (GET_CODE (info->def)));
}
/* Name in reservation to denote absence reservation. */
#define NOTHING_NAME "nothing"
/* The following string contains original reservation string being
parsed. */
static const char *reserv_str;
/* Parse an element in STR. */
static regexp_t
gen_regexp_el (const char *str)
{
regexp_t regexp;
char *dstr;
int len;
if (*str == '(')
{
len = strlen (str);
if (str [len - 1] != ')')
fatal ("garbage after ) in reservation `%s'", reserv_str);
dstr = XALLOCAVAR (char, len - 1);
memcpy (dstr, str + 1, len - 2);
dstr [len-2] = '\0';
regexp = gen_regexp_sequence (dstr);
}
else if (strcmp (str, NOTHING_NAME) == 0)
{
regexp = XCREATENODE (struct regexp);
regexp->mode = rm_nothing;
}
else
{
regexp = XCREATENODE (struct regexp);
regexp->mode = rm_unit;
REGEXP_UNIT (regexp)->name = str;
}
return regexp;
}
/* Parse construction `repeat' in STR. */
static regexp_t
gen_regexp_repeat (const char *str)
{
regexp_t regexp;
regexp_t repeat;
char **repeat_vect;
int els_num;
int i;
repeat_vect = get_str_vect (str, &els_num, '*', TRUE);
if (repeat_vect == NULL)
fatal ("invalid `%s' in reservation `%s'", str, reserv_str);
if (els_num > 1)
{
regexp = gen_regexp_el (repeat_vect [0]);
for (i = 1; i < els_num; i++)
{
repeat = XCREATENODE (struct regexp);
repeat->mode = rm_repeat;
REGEXP_REPEAT (repeat)->regexp = regexp;
REGEXP_REPEAT (repeat)->repeat_num = atoi (repeat_vect [i]);
if (REGEXP_REPEAT (repeat)->repeat_num <= 1)
fatal ("repetition `%s' <= 1 in reservation `%s'",
str, reserv_str);
regexp = repeat;
}
return regexp;
}
else
return gen_regexp_el (repeat_vect[0]);
}
/* Parse reservation STR which possibly contains separator '+'. */
static regexp_t
gen_regexp_allof (const char *str)
{
regexp_t allof;
char **allof_vect;
int els_num;
int i;
allof_vect = get_str_vect (str, &els_num, '+', TRUE);
if (allof_vect == NULL)
fatal ("invalid `%s' in reservation `%s'", str, reserv_str);
if (els_num > 1)
{
allof = XCREATENODEVAR (struct regexp, sizeof (struct regexp)
+ sizeof (regexp_t) * (els_num - 1));
allof->mode = rm_allof;
REGEXP_ALLOF (allof)->regexps_num = els_num;
for (i = 0; i < els_num; i++)
REGEXP_ALLOF (allof)->regexps [i] = gen_regexp_repeat (allof_vect [i]);
return allof;
}
else
return gen_regexp_repeat (allof_vect[0]);
}
/* Parse reservation STR which possibly contains separator '|'. */
static regexp_t
gen_regexp_oneof (const char *str)
{
regexp_t oneof;
char **oneof_vect;
int els_num;
int i;
oneof_vect = get_str_vect (str, &els_num, '|', TRUE);
if (oneof_vect == NULL)
fatal ("invalid `%s' in reservation `%s'", str, reserv_str);
if (els_num > 1)
{
oneof = XCREATENODEVAR (struct regexp, sizeof (struct regexp)
+ sizeof (regexp_t) * (els_num - 1));
oneof->mode = rm_oneof;
REGEXP_ONEOF (oneof)->regexps_num = els_num;
for (i = 0; i < els_num; i++)
REGEXP_ONEOF (oneof)->regexps [i] = gen_regexp_allof (oneof_vect [i]);
return oneof;
}
else
return gen_regexp_allof (oneof_vect[0]);
}
/* Parse reservation STR which possibly contains separator ','. */
static regexp_t
gen_regexp_sequence (const char *str)
{
regexp_t sequence;
char **sequence_vect;
int els_num;
int i;
sequence_vect = get_str_vect (str, &els_num, ',', TRUE);
if (els_num == -1)
fatal ("unbalanced parentheses in reservation `%s'", str);
if (sequence_vect == NULL)
fatal ("invalid reservation `%s'", str);
if (els_num > 1)
{
sequence = XCREATENODEVAR (struct regexp, sizeof (struct regexp)
+ sizeof (regexp_t) * (els_num - 1));
sequence->mode = rm_sequence;
REGEXP_SEQUENCE (sequence)->regexps_num = els_num;
for (i = 0; i < els_num; i++)
REGEXP_SEQUENCE (sequence)->regexps [i]
= gen_regexp_oneof (sequence_vect [i]);
return sequence;
}
else
return gen_regexp_oneof (sequence_vect[0]);
}
/* Parse construction reservation STR. */
static regexp_t
gen_regexp (const char *str)
{
reserv_str = str;
return gen_regexp_sequence (str);
}
/* Process a DEFINE_RESERVATION.
This gives information about a reservation of cpu units. We fill
in a struct reserv_decl with information used later by
`expand_automata'. */
static void
gen_reserv (md_rtx_info *info)
{
decl_t decl;
rtx def = info->def;
decl = XCREATENODE (struct decl);
decl->mode = dm_reserv;
decl->pos = 0;
DECL_RESERV (decl)->name = check_name (XSTR (def, 0), decl->pos);
DECL_RESERV (decl)->regexp = gen_regexp (XSTR (def, 1));
decls.safe_push (decl);
}
/* Process a DEFINE_INSN_RESERVATION.
This gives information about the reservation of cpu units by an
insn. We fill a struct insn_reserv_decl with information used
later by `expand_automata'. */
static void
gen_insn_reserv (md_rtx_info *info)
{
decl_t decl;
rtx def = info->def;
decl = XCREATENODE (struct decl);
decl->mode = dm_insn_reserv;
decl->pos = 0;
DECL_INSN_RESERV (decl)->name
= check_name (XSTR (def, 0), decl->pos);
DECL_INSN_RESERV (decl)->default_latency = XINT (def, 1);
DECL_INSN_RESERV (decl)->condexp = XEXP (def, 2);
DECL_INSN_RESERV (decl)->regexp = gen_regexp (XSTR (def, 3));
decls.safe_push (decl);
}
/* The function evaluates hash value (0..UINT_MAX) of string. */
static unsigned
string_hash (const char *string)
{
unsigned result, i;
for (result = i = 0;*string++ != '\0'; i++)
result += ((unsigned char) *string << (i % CHAR_BIT));
return result;
}
/* This page contains abstract data `table of automaton declarations'.
Elements of the table is nodes representing automaton declarations.
Key of the table elements is name of given automaton. Remember
that automaton names have own space. */
/* The function evaluates hash value of an automaton declaration. The
function is used by abstract data `hashtab'. The function returns
hash value (0..UINT_MAX) of given automaton declaration. */
static hashval_t
automaton_decl_hash (const void *automaton_decl)
{
const_decl_t const decl = (const_decl_t) automaton_decl;
gcc_assert (decl->mode != dm_automaton
|| DECL_AUTOMATON (decl)->name);
return string_hash (DECL_AUTOMATON (decl)->name);
}
/* The function tests automaton declarations on equality of their
keys. The function is used by abstract data `hashtab'. The
function returns 1 if the declarations have the same key, 0
otherwise. */
static int
automaton_decl_eq_p (const void* automaton_decl_1,
const void* automaton_decl_2)
{
const_decl_t const decl1 = (const_decl_t) automaton_decl_1;
const_decl_t const decl2 = (const_decl_t) automaton_decl_2;
gcc_assert (decl1->mode == dm_automaton
&& DECL_AUTOMATON (decl1)->name
&& decl2->mode == dm_automaton
&& DECL_AUTOMATON (decl2)->name);
return strcmp (DECL_AUTOMATON (decl1)->name,
DECL_AUTOMATON (decl2)->name) == 0;
}
/* The automaton declaration table itself is represented by the
following variable. */
static htab_t automaton_decl_table;
/* The function inserts automaton declaration into the table. The
function does nothing if an automaton declaration with the same key
exists already in the table. The function returns automaton
declaration node in the table with the same key as given automaton
declaration node. */
static decl_t
insert_automaton_decl (decl_t automaton_decl)
{
void **entry_ptr;
entry_ptr = htab_find_slot (automaton_decl_table, automaton_decl, INSERT);
if (*entry_ptr == NULL)
*entry_ptr = (void *) automaton_decl;
return (decl_t) *entry_ptr;
}
/* The following variable value is node representing automaton
declaration. The node used for searching automaton declaration
with given name. */
static struct decl work_automaton_decl;
/* The function searches for automaton declaration in the table with
the same key as node representing name of the automaton
declaration. The function returns node found in the table, NULL if
such node does not exist in the table. */
static decl_t
find_automaton_decl (const char *name)
{
void *entry;
work_automaton_decl.mode = dm_automaton;
DECL_AUTOMATON (&work_automaton_decl)->name = name;
entry = htab_find (automaton_decl_table, &work_automaton_decl);
return (decl_t) entry;
}
/* The function creates empty automaton declaration table and node
representing automaton declaration and used for searching automaton
declaration with given name. The function must be called only once
before any work with the automaton declaration table. */
static void
initiate_automaton_decl_table (void)
{
work_automaton_decl.mode = dm_automaton;
automaton_decl_table = htab_create (10, automaton_decl_hash,
automaton_decl_eq_p, (htab_del) 0);
}
/* The function deletes the automaton declaration table. Only call of
function `initiate_automaton_decl_table' is possible immediately
after this function call. */
static void
finish_automaton_decl_table (void)
{
htab_delete (automaton_decl_table);
}
/* This page contains abstract data `table of insn declarations'.
Elements of the table is nodes representing insn declarations. Key
of the table elements is name of given insn (in corresponding
define_insn_reservation). Remember that insn names have own
space. */
/* The function evaluates hash value of an insn declaration. The
function is used by abstract data `hashtab'. The function returns
hash value (0..UINT_MAX) of given insn declaration. */
static hashval_t
insn_decl_hash (const void *insn_decl)
{
const_decl_t const decl = (const_decl_t) insn_decl;
gcc_assert (decl->mode == dm_insn_reserv
&& DECL_INSN_RESERV (decl)->name);
return string_hash (DECL_INSN_RESERV (decl)->name);
}
/* The function tests insn declarations on equality of their keys.
The function is used by abstract data `hashtab'. The function
returns 1 if declarations have the same key, 0 otherwise. */
static int
insn_decl_eq_p (const void *insn_decl_1, const void *insn_decl_2)
{
const_decl_t const decl1 = (const_decl_t) insn_decl_1;
const_decl_t const decl2 = (const_decl_t) insn_decl_2;
gcc_assert (decl1->mode == dm_insn_reserv
&& DECL_INSN_RESERV (decl1)->name
&& decl2->mode == dm_insn_reserv
&& DECL_INSN_RESERV (decl2)->name);
return strcmp (DECL_INSN_RESERV (decl1)->name,
DECL_INSN_RESERV (decl2)->name) == 0;
}
/* The insn declaration table itself is represented by the following
variable. The table does not contain insn reservation
declarations. */
static htab_t insn_decl_table;
/* The function inserts insn declaration into the table. The function
does nothing if an insn declaration with the same key exists
already in the table. The function returns insn declaration node
in the table with the same key as given insn declaration node. */
static decl_t
insert_insn_decl (decl_t insn_decl)
{
void **entry_ptr;
entry_ptr = htab_find_slot (insn_decl_table, insn_decl, INSERT);
if (*entry_ptr == NULL)
*entry_ptr = (void *) insn_decl;
return (decl_t) *entry_ptr;
}
/* The following variable value is node representing insn reservation
declaration. The node used for searching insn reservation
declaration with given name. */
static struct decl work_insn_decl;
/* The function searches for insn reservation declaration in the table
with the same key as node representing name of the insn reservation
declaration. The function returns node found in the table, NULL if
such node does not exist in the table. */
static decl_t
find_insn_decl (const char *name)
{
void *entry;
work_insn_decl.mode = dm_insn_reserv;
DECL_INSN_RESERV (&work_insn_decl)->name = name;
entry = htab_find (insn_decl_table, &work_insn_decl);
return (decl_t) entry;
}
/* The function creates empty insn declaration table and node
representing insn declaration and used for searching insn
declaration with given name. The function must be called only once
before any work with the insn declaration table. */
static void
initiate_insn_decl_table (void)
{
work_insn_decl.mode = dm_insn_reserv;
insn_decl_table = htab_create (10, insn_decl_hash, insn_decl_eq_p,
(htab_del) 0);
}
/* The function deletes the insn declaration table. Only call of
function `initiate_insn_decl_table' is possible immediately after
this function call. */
static void
finish_insn_decl_table (void)
{
htab_delete (insn_decl_table);
}
/* This page contains abstract data `table of declarations'. Elements
of the table is nodes representing declarations (of units and
reservations). Key of the table elements is names of given
declarations. */
/* The function evaluates hash value of a declaration. The function
is used by abstract data `hashtab'. The function returns hash
value (0..UINT_MAX) of given declaration. */
static hashval_t
decl_hash (const void *decl)
{
const_decl_t const d = (const_decl_t) decl;
gcc_assert ((d->mode == dm_unit && DECL_UNIT (d)->name)
|| (d->mode == dm_reserv && DECL_RESERV (d)->name));
return string_hash (d->mode == dm_unit
? DECL_UNIT (d)->name : DECL_RESERV (d)->name);
}
/* The function tests declarations on equality of their keys. The
function is used by abstract data 'hashtab'. The function
returns 1 if the declarations have the same key, 0 otherwise. */
static int
decl_eq_p (const void *decl_1, const void *decl_2)
{
const_decl_t const d1 = (const_decl_t) decl_1;
const_decl_t const d2 = (const_decl_t) decl_2;
gcc_assert ((d1->mode == dm_unit && DECL_UNIT (d1)->name)
|| (d1->mode == dm_reserv && DECL_RESERV (d1)->name));
gcc_assert ((d2->mode == dm_unit && DECL_UNIT (d2)->name)
|| (d2->mode == dm_reserv && DECL_RESERV (d2)->name));
return strcmp ((d1->mode == dm_unit
? DECL_UNIT (d1)->name : DECL_RESERV (d1)->name),
(d2->mode == dm_unit
? DECL_UNIT (d2)->name : DECL_RESERV (d2)->name)) == 0;
}
/* The declaration table itself is represented by the following
variable. */
static htab_t decl_table;
/* The function inserts declaration into the table. The function does
nothing if a declaration with the same key exists already in the
table. The function returns declaration node in the table with the
same key as given declaration node. */
static decl_t
insert_decl (decl_t decl)
{
void **entry_ptr;
entry_ptr = htab_find_slot (decl_table, decl, INSERT);
if (*entry_ptr == NULL)
*entry_ptr = (void *) decl;
return (decl_t) *entry_ptr;
}
/* The following variable value is node representing declaration. The
node used for searching declaration with given name. */
static struct decl work_decl;
/* The function searches for declaration in the table with the same
key as node representing name of the declaration. The function
returns node found in the table, NULL if such node does not exist
in the table. */
static decl_t
find_decl (const char *name)
{
void *entry;
work_decl.mode = dm_unit;
DECL_UNIT (&work_decl)->name = name;
entry = htab_find (decl_table, &work_decl);
return (decl_t) entry;
}
/* The function creates empty declaration table and node representing
declaration and used for searching declaration with given name.
The function must be called only once before any work with the
declaration table. */
static void
initiate_decl_table (void)
{
work_decl.mode = dm_unit;
decl_table = htab_create (10, decl_hash, decl_eq_p, (htab_del) 0);
}
/* The function deletes the declaration table. Only call of function
`initiate_declaration_table' is possible immediately after this
function call. */
static void
finish_decl_table (void)
{
htab_delete (decl_table);
}
/* This page contains checker of pipeline hazard description. */
/* Checking NAMES in an exclusion clause vector and returning formed
unit_set_el_list. */
static unit_set_el_t
process_excls (char **names, int num, pos_t excl_pos ATTRIBUTE_UNUSED)
{
unit_set_el_t el_list;
unit_set_el_t last_el;
unit_set_el_t new_el;
decl_t decl_in_table;
int i;
el_list = NULL;
last_el = NULL;
for (i = 0; i < num; i++)
{
decl_in_table = find_decl (names [i]);
if (decl_in_table == NULL)
error ("unit `%s' in exclusion is not declared", names [i]);
else if (decl_in_table->mode != dm_unit)
error ("`%s' in exclusion is not unit", names [i]);
else
{
new_el = XCREATENODE (struct unit_set_el);
new_el->unit_decl = DECL_UNIT (decl_in_table);
new_el->next_unit_set_el = NULL;
if (last_el == NULL)
el_list = last_el = new_el;
else
{
last_el->next_unit_set_el = new_el;
last_el = last_el->next_unit_set_el;
}
}
}
return el_list;
}
/* The function adds each element from SOURCE_LIST to the exclusion
list of the each element from DEST_LIST. Checking situation "unit
excludes itself". */
static void
add_excls (unit_set_el_t dest_list, unit_set_el_t source_list,
pos_t excl_pos ATTRIBUTE_UNUSED)
{
unit_set_el_t dst;
unit_set_el_t src;
unit_set_el_t curr_el;
unit_set_el_t prev_el;
unit_set_el_t copy;
for (dst = dest_list; dst != NULL; dst = dst->next_unit_set_el)
for (src = source_list; src != NULL; src = src->next_unit_set_el)
{
if (dst->unit_decl == src->unit_decl)
{
error ("unit `%s' excludes itself", src->unit_decl->name);
continue;
}
if (dst->unit_decl->automaton_name != NULL
&& src->unit_decl->automaton_name != NULL
&& strcmp (dst->unit_decl->automaton_name,
src->unit_decl->automaton_name) != 0)
{
error ("units `%s' and `%s' in exclusion set belong to different automata",
src->unit_decl->name, dst->unit_decl->name);
continue;
}
for (curr_el = dst->unit_decl->excl_list, prev_el = NULL;
curr_el != NULL;
prev_el = curr_el, curr_el = curr_el->next_unit_set_el)
if (curr_el->unit_decl == src->unit_decl)
break;
if (curr_el == NULL)
{
/* Element not found - insert. */
copy = XCOPYNODE (struct unit_set_el, src);
copy->next_unit_set_el = NULL;
if (prev_el == NULL)
dst->unit_decl->excl_list = copy;
else
prev_el->next_unit_set_el = copy;
}
}
}
/* Checking NAMES in presence/absence clause and returning the
formed unit_set_el_list. The function is called only after
processing all exclusion sets. */
static unit_set_el_t
process_presence_absence_names (char **names, int num,
pos_t req_pos ATTRIBUTE_UNUSED,
int presence_p, int final_p)
{
unit_set_el_t el_list;
unit_set_el_t last_el;
unit_set_el_t new_el;
decl_t decl_in_table;
int i;
el_list = NULL;
last_el = NULL;
for (i = 0; i < num; i++)
{
decl_in_table = find_decl (names [i]);
if (decl_in_table == NULL)
error ((presence_p
? (final_p
? "unit `%s' in final presence set is not declared"
: "unit `%s' in presence set is not declared")
: (final_p
? "unit `%s' in final absence set is not declared"
: "unit `%s' in absence set is not declared")), names [i]);
else if (decl_in_table->mode != dm_unit)
error ((presence_p
? (final_p
? "`%s' in final presence set is not unit"
: "`%s' in presence set is not unit")
: (final_p
? "`%s' in final absence set is not unit"
: "`%s' in absence set is not unit")), names [i]);
else
{
new_el = XCREATENODE (struct unit_set_el);
new_el->unit_decl = DECL_UNIT (decl_in_table);
new_el->next_unit_set_el = NULL;
if (last_el == NULL)
el_list = last_el = new_el;
else
{
last_el->next_unit_set_el = new_el;
last_el = last_el->next_unit_set_el;
}
}
}
return el_list;
}
/* Checking NAMES in patterns of a presence/absence clause and
returning the formed pattern_set_el_list. The function is called
only after processing all exclusion sets. */
static pattern_set_el_t
process_presence_absence_patterns (char ***patterns, int num,
pos_t req_pos ATTRIBUTE_UNUSED,
int presence_p, int final_p)
{
pattern_set_el_t el_list;
pattern_set_el_t last_el;
pattern_set_el_t new_el;
decl_t decl_in_table;
int i, j;
el_list = NULL;
last_el = NULL;
for (i = 0; i < num; i++)
{
for (j = 0; patterns [i] [j] != NULL; j++)
;
new_el = XCREATENODEVAR (struct pattern_set_el,
sizeof (struct pattern_set_el)
+ sizeof (struct unit_decl *) * j);
new_el->unit_decls
= (struct unit_decl **) ((char *) new_el
+ sizeof (struct pattern_set_el));
new_el->next_pattern_set_el = NULL;
if (last_el == NULL)
el_list = last_el = new_el;
else
{
last_el->next_pattern_set_el = new_el;
last_el = last_el->next_pattern_set_el;
}
new_el->units_num = 0;
for (j = 0; patterns [i] [j] != NULL; j++)
{
decl_in_table = find_decl (patterns [i] [j]);
if (decl_in_table == NULL)
error ((presence_p
? (final_p
? "unit `%s' in final presence set is not declared"
: "unit `%s' in presence set is not declared")
: (final_p
? "unit `%s' in final absence set is not declared"
: "unit `%s' in absence set is not declared")),
patterns [i] [j]);
else if (decl_in_table->mode != dm_unit)
error ((presence_p
? (final_p
? "`%s' in final presence set is not unit"
: "`%s' in presence set is not unit")
: (final_p
? "`%s' in final absence set is not unit"
: "`%s' in absence set is not unit")),
patterns [i] [j]);
else
{
new_el->unit_decls [new_el->units_num]
= DECL_UNIT (decl_in_table);
new_el->units_num++;
}
}
}
return el_list;
}
/* The function adds each element from PATTERN_LIST to presence (if
PRESENCE_P) or absence list of the each element from DEST_LIST.
Checking situations "unit requires own absence", and "unit excludes
and requires presence of ...", "unit requires absence and presence
of ...", "units in (final) presence set belong to different
automata", and "units in (final) absence set belong to different
automata". Remember that we process absence sets only after all
presence sets. */
static void
add_presence_absence (unit_set_el_t dest_list,
pattern_set_el_t pattern_list,
pos_t req_pos ATTRIBUTE_UNUSED,
int presence_p, int final_p)
{
unit_set_el_t dst;
pattern_set_el_t pat;
struct unit_decl *unit;
unit_set_el_t curr_excl_el;
pattern_set_el_t curr_pat_el;
pattern_set_el_t prev_el;
pattern_set_el_t copy;
int i;
int no_error_flag;
for (dst = dest_list; dst != NULL; dst = dst->next_unit_set_el)
for (pat = pattern_list; pat != NULL; pat = pat->next_pattern_set_el)
{
for (i = 0; i < pat->units_num; i++)
{
unit = pat->unit_decls [i];
if (dst->unit_decl == unit && pat->units_num == 1 && !presence_p)
{
error ("unit `%s' requires own absence", unit->name);
continue;
}
if (dst->unit_decl->automaton_name != NULL
&& unit->automaton_name != NULL
&& strcmp (dst->unit_decl->automaton_name,
unit->automaton_name) != 0)
{
error ((presence_p
? (final_p
? "units `%s' and `%s' in final presence set belong to different automata"
: "units `%s' and `%s' in presence set belong to different automata")
: (final_p
? "units `%s' and `%s' in final absence set belong to different automata"
: "units `%s' and `%s' in absence set belong to different automata")),
unit->name, dst->unit_decl->name);
continue;
}
no_error_flag = 1;
if (presence_p)
for (curr_excl_el = dst->unit_decl->excl_list;
curr_excl_el != NULL;
curr_excl_el = curr_excl_el->next_unit_set_el)
{
if (unit == curr_excl_el->unit_decl && pat->units_num == 1)
{
if (!w_flag)
{
error ("unit `%s' excludes and requires presence of `%s'",
dst->unit_decl->name, unit->name);
no_error_flag = 0;
}
else
warning ("unit `%s' excludes and requires presence of `%s'",
dst->unit_decl->name, unit->name);
}
}
else if (pat->units_num == 1)
for (curr_pat_el = dst->unit_decl->presence_list;
curr_pat_el != NULL;
curr_pat_el = curr_pat_el->next_pattern_set_el)
if (curr_pat_el->units_num == 1
&& unit == curr_pat_el->unit_decls [0])
{
if (!w_flag)
{
error ("unit `%s' requires absence and presence of `%s'",
dst->unit_decl->name, unit->name);
no_error_flag = 0;
}
else
warning ("unit `%s' requires absence and presence of `%s'",
dst->unit_decl->name, unit->name);
}
if (no_error_flag)
{
for (prev_el = (presence_p
? (final_p
? dst->unit_decl->final_presence_list
: dst->unit_decl->presence_list)
: (final_p
? dst->unit_decl->final_absence_list
: dst->unit_decl->absence_list));
prev_el != NULL && prev_el->next_pattern_set_el != NULL;
prev_el = prev_el->next_pattern_set_el)
;
copy = XCOPYNODE (struct pattern_set_el, pat);
copy->next_pattern_set_el = NULL;
if (prev_el == NULL)
{
if (presence_p)
{
if (final_p)
dst->unit_decl->final_presence_list = copy;
else
dst->unit_decl->presence_list = copy;
}
else if (final_p)
dst->unit_decl->final_absence_list = copy;
else
dst->unit_decl->absence_list = copy;
}
else
prev_el->next_pattern_set_el = copy;
}
}
}
}
/* The function inserts BYPASS in the list of bypasses of the
corresponding output insn. The order of bypasses in the list is
described in a comment for member `bypass_list' (see above). If
there is already the same bypass in the list the function reports
this and does nothing. */
static void
insert_bypass (struct bypass_decl *bypass)
{
struct bypass_decl *curr, *last;
struct insn_reserv_decl *out_insn_reserv = bypass->out_insn_reserv;
struct insn_reserv_decl *in_insn_reserv = bypass->in_insn_reserv;
for (curr = out_insn_reserv->bypass_list, last = NULL;
curr != NULL;
last = curr, curr = curr->next)
if (curr->in_insn_reserv == in_insn_reserv)
{
if ((bypass->bypass_guard_name != NULL
&& curr->bypass_guard_name != NULL
&& ! strcmp (bypass->bypass_guard_name, curr->bypass_guard_name))
|| bypass->bypass_guard_name == curr->bypass_guard_name)
{
if (bypass->bypass_guard_name == NULL)
{
if (!w_flag)
error ("the same bypass `%s - %s' is already defined",
bypass->out_pattern, bypass->in_pattern);
else
warning ("the same bypass `%s - %s' is already defined",
bypass->out_pattern, bypass->in_pattern);
}
else if (!w_flag)
error ("the same bypass `%s - %s' (guard %s) is already defined",
bypass->out_pattern, bypass->in_pattern,
bypass->bypass_guard_name);
else
warning
("the same bypass `%s - %s' (guard %s) is already defined",
bypass->out_pattern, bypass->in_pattern,
bypass->bypass_guard_name);
return;
}
if (curr->bypass_guard_name == NULL)
break;
if (curr->next == NULL || curr->next->in_insn_reserv != in_insn_reserv)
{
last = curr;
break;
}
}
if (last == NULL)
{
bypass->next = out_insn_reserv->bypass_list;
out_insn_reserv->bypass_list = bypass;
}
else
{
bypass->next = last->next;
last->next = bypass;
}
}
/* BYPASS is a define_bypass decl that includes glob pattern PATTERN.
Call FN (BYPASS, INSN, DATA) for each matching instruction INSN. */
static void
for_each_matching_insn (decl_t bypass, const char *pattern,
void (*fn) (decl_t, decl_t, void *), void *data)
{
decl_t insn_reserv;
bool matched_p;
int i;
matched_p = false;
if (strpbrk (pattern, "*?["))
for (i = 0; i < description->decls_num; i++)
{
insn_reserv = description->decls[i];
if (insn_reserv->mode == dm_insn_reserv
&& fnmatch (pattern, DECL_INSN_RESERV (insn_reserv)->name, 0) == 0)
{
fn (bypass, insn_reserv, data);
matched_p = true;
}
}
else
{
insn_reserv = find_insn_decl (pattern);
if (insn_reserv)
{
fn (bypass, insn_reserv, data);
matched_p = true;
}
}
if (!matched_p)
error ("there is no insn reservation that matches `%s'", pattern);
}
/* A subroutine of process_bypass that is called for each pair
of matching instructions. OUT_INSN_RESERV is the output
instruction and DATA is the input instruction. */
static void
process_bypass_2 (decl_t model, decl_t out_insn_reserv, void *data)
{
struct bypass_decl *bypass;
decl_t in_insn_reserv;
in_insn_reserv = (decl_t) data;
if (strcmp (DECL_INSN_RESERV (in_insn_reserv)->name,
DECL_BYPASS (model)->in_pattern) == 0
&& strcmp (DECL_INSN_RESERV (out_insn_reserv)->name,
DECL_BYPASS (model)->out_pattern) == 0)
bypass = DECL_BYPASS (model);
else
{
bypass = XCNEW (struct bypass_decl);
bypass->latency = DECL_BYPASS (model)->latency;
bypass->out_pattern = DECL_INSN_RESERV (out_insn_reserv)->name;
bypass->in_pattern = DECL_INSN_RESERV (in_insn_reserv)->name;
bypass->bypass_guard_name = DECL_BYPASS (model)->bypass_guard_name;
}
bypass->out_insn_reserv = DECL_INSN_RESERV (out_insn_reserv);
bypass->in_insn_reserv = DECL_INSN_RESERV (in_insn_reserv);
insert_bypass (bypass);
}
/* A subroutine of process_bypass that is called for each input
instruction IN_INSN_RESERV. */
static void
process_bypass_1 (decl_t bypass, decl_t in_insn_reserv,
void *data ATTRIBUTE_UNUSED)
{
for_each_matching_insn (bypass, DECL_BYPASS (bypass)->out_pattern,
process_bypass_2, in_insn_reserv);
}
/* Process define_bypass decl BYPASS, inserting a bypass for each specific
pair of insn reservations. */
static void
process_bypass (decl_t bypass)
{
for_each_matching_insn (bypass, DECL_BYPASS (bypass)->in_pattern,
process_bypass_1, NULL);
}
/* The function processes pipeline description declarations, checks
their correctness, and forms exclusion/presence/absence sets. */
static void
process_decls (void)
{
decl_t decl;
decl_t automaton_decl;
decl_t decl_in_table;
int automaton_presence;
int i;
/* Checking repeated automata declarations. */
automaton_presence = 0;
for (i = 0; i < description->decls_num; i++)
{
decl = description->decls [i];
if (decl->mode == dm_automaton)
{
automaton_presence = 1;
decl_in_table = insert_automaton_decl (decl);
if (decl_in_table != decl)
{
if (!w_flag)
error ("repeated declaration of automaton `%s'",
DECL_AUTOMATON (decl)->name);
else
warning ("repeated declaration of automaton `%s'",
DECL_AUTOMATON (decl)->name);
}
}
}
/* Checking undeclared automata, repeated declarations (except for
automata) and correctness of their attributes (insn latency times
etc.). */
for (i = 0; i < description->decls_num; i++)
{
decl = description->decls [i];
if (decl->mode == dm_insn_reserv)
{
if (DECL_INSN_RESERV (decl)->default_latency < 0)
error ("define_insn_reservation `%s' has negative latency time",
DECL_INSN_RESERV (decl)->name);
DECL_INSN_RESERV (decl)->insn_num = description->insns_num;
description->insns_num++;
decl_in_table = insert_insn_decl (decl);
if (decl_in_table != decl)
error ("`%s' is already used as insn reservation name",
DECL_INSN_RESERV (decl)->name);
}
else if (decl->mode == dm_bypass)
{
if (DECL_BYPASS (decl)->latency < 0)
error ("define_bypass `%s - %s' has negative latency time",
DECL_BYPASS (decl)->out_pattern,
DECL_BYPASS (decl)->in_pattern);
}
else if (decl->mode == dm_unit || decl->mode == dm_reserv)
{
if (decl->mode == dm_unit)
{
DECL_UNIT (decl)->automaton_decl = NULL;
if (DECL_UNIT (decl)->automaton_name != NULL)
{
automaton_decl
= find_automaton_decl (DECL_UNIT (decl)->automaton_name);
if (automaton_decl == NULL)
error ("automaton `%s' is not declared",
DECL_UNIT (decl)->automaton_name);
else
{
DECL_AUTOMATON (automaton_decl)->automaton_is_used = 1;
DECL_UNIT (decl)->automaton_decl
= DECL_AUTOMATON (automaton_decl);
}
}
else if (automaton_presence)
error ("define_unit `%s' without automaton when one defined",
DECL_UNIT (decl)->name);
DECL_UNIT (decl)->unit_num = description->units_num;
description->units_num++;
if (strcmp (DECL_UNIT (decl)->name, NOTHING_NAME) == 0)
{
error ("`%s' is declared as cpu unit", NOTHING_NAME);
continue;
}
decl_in_table = find_decl (DECL_UNIT (decl)->name);
}
else
{
if (strcmp (DECL_RESERV (decl)->name, NOTHING_NAME) == 0)
{
error ("`%s' is declared as cpu reservation", NOTHING_NAME);
continue;
}
decl_in_table = find_decl (DECL_RESERV (decl)->name);
}
if (decl_in_table == NULL)
decl_in_table = insert_decl (decl);
else
{
if (decl->mode == dm_unit)
error ("repeated declaration of unit `%s'",
DECL_UNIT (decl)->name);
else
error ("repeated declaration of reservation `%s'",
DECL_RESERV (decl)->name);
}
}
}
/* Check bypasses and form list of bypasses for each (output)
insn. */
for (i = 0; i < description->decls_num; i++)
{
decl = description->decls [i];
if (decl->mode == dm_bypass)
process_bypass (decl);
}
/* Check exclusion set declarations and form exclusion sets. */
for (i = 0; i < description->decls_num; i++)
{
decl = description->decls [i];
if (decl->mode == dm_excl)
{
unit_set_el_t unit_set_el_list;
unit_set_el_t unit_set_el_list_2;
unit_set_el_list
= process_excls (DECL_EXCL (decl)->names,
DECL_EXCL (decl)->first_list_length, decl->pos);
unit_set_el_list_2
= process_excls (&DECL_EXCL (decl)->names
[DECL_EXCL (decl)->first_list_length],
DECL_EXCL (decl)->all_names_num
- DECL_EXCL (decl)->first_list_length,
decl->pos);
add_excls (unit_set_el_list, unit_set_el_list_2, decl->pos);
add_excls (unit_set_el_list_2, unit_set_el_list, decl->pos);
}
}
/* Check presence set declarations and form presence sets. */
for (i = 0; i < description->decls_num; i++)
{
decl = description->decls [i];
if (decl->mode == dm_presence)
{
unit_set_el_t unit_set_el_list;
pattern_set_el_t pattern_set_el_list;
unit_set_el_list
= process_presence_absence_names
(DECL_PRESENCE (decl)->names, DECL_PRESENCE (decl)->names_num,
decl->pos, TRUE, DECL_PRESENCE (decl)->final_p);
pattern_set_el_list
= process_presence_absence_patterns
(DECL_PRESENCE (decl)->patterns,
DECL_PRESENCE (decl)->patterns_num,
decl->pos, TRUE, DECL_PRESENCE (decl)->final_p);
add_presence_absence (unit_set_el_list, pattern_set_el_list,
decl->pos, TRUE,
DECL_PRESENCE (decl)->final_p);
}
}
/* Check absence set declarations and form absence sets. */
for (i = 0; i < description->decls_num; i++)
{
decl = description->decls [i];
if (decl->mode == dm_absence)
{
unit_set_el_t unit_set_el_list;
pattern_set_el_t pattern_set_el_list;
unit_set_el_list
= process_presence_absence_names
(DECL_ABSENCE (decl)->names, DECL_ABSENCE (decl)->names_num,
decl->pos, FALSE, DECL_ABSENCE (decl)->final_p);
pattern_set_el_list
= process_presence_absence_patterns
(DECL_ABSENCE (decl)->patterns,
DECL_ABSENCE (decl)->patterns_num,
decl->pos, FALSE, DECL_ABSENCE (decl)->final_p);
add_presence_absence (unit_set_el_list, pattern_set_el_list,
decl->pos, FALSE,
DECL_ABSENCE (decl)->final_p);
}
}
}
/* The following function checks that declared automaton is used. If
the automaton is not used, the function fixes error/warning. The
following function must be called only after `process_decls'. */
static void
check_automaton_usage (void)
{
decl_t decl;
int i;
for (i = 0; i < description->decls_num; i++)
{
decl = description->decls [i];
if (decl->mode == dm_automaton
&& !DECL_AUTOMATON (decl)->automaton_is_used)
{
if (!w_flag)
error ("automaton `%s' is not used", DECL_AUTOMATON (decl)->name);
else
warning ("automaton `%s' is not used",
DECL_AUTOMATON (decl)->name);
}
}
}
/* The following recursive function processes all regexp in order to
fix usage of units or reservations and to fix errors of undeclared
name. The function may change unit_regexp onto reserv_regexp.
Remember that reserv_regexp does not exist before the function
call. */
static regexp_t
process_regexp (regexp_t regexp)
{
decl_t decl_in_table;
regexp_t new_regexp;
int i;
switch (regexp->mode)
{
case rm_unit:
decl_in_table = find_decl (REGEXP_UNIT (regexp)->name);
if (decl_in_table == NULL)
error ("undeclared unit or reservation `%s'",
REGEXP_UNIT (regexp)->name);
else
switch (decl_in_table->mode)
{
case dm_unit:
DECL_UNIT (decl_in_table)->unit_is_used = 1;
REGEXP_UNIT (regexp)->unit_decl = DECL_UNIT (decl_in_table);
break;
case dm_reserv:
DECL_RESERV (decl_in_table)->reserv_is_used = 1;
new_regexp = XCREATENODE (struct regexp);
new_regexp->mode = rm_reserv;
new_regexp->pos = regexp->pos;
REGEXP_RESERV (new_regexp)->name = REGEXP_UNIT (regexp)->name;
REGEXP_RESERV (new_regexp)->reserv_decl
= DECL_RESERV (decl_in_table);
regexp = new_regexp;
break;
default:
gcc_unreachable ();
}
break;
case rm_sequence:
for (i = 0; i <REGEXP_SEQUENCE (regexp)->regexps_num; i++)
REGEXP_SEQUENCE (regexp)->regexps [i]
= process_regexp (REGEXP_SEQUENCE (regexp)->regexps [i]);
break;
case rm_allof:
for (i = 0; i < REGEXP_ALLOF (regexp)->regexps_num; i++)
REGEXP_ALLOF (regexp)->regexps [i]
= process_regexp (REGEXP_ALLOF (regexp)->regexps [i]);
break;
case rm_oneof:
for (i = 0; i < REGEXP_ONEOF (regexp)->regexps_num; i++)
REGEXP_ONEOF (regexp)->regexps [i]
= process_regexp (REGEXP_ONEOF (regexp)->regexps [i]);
break;
case rm_repeat:
REGEXP_REPEAT (regexp)->regexp
= process_regexp (REGEXP_REPEAT (regexp)->regexp);
break;
case rm_nothing:
break;
default:
gcc_unreachable ();
}
return regexp;
}
/* The following function processes regexp of define_reservation and
define_insn_reservation with the aid of function
`process_regexp'. */
static void
process_regexp_decls (void)
{
decl_t decl;
int i;
for (i = 0; i < description->decls_num; i++)
{
decl = description->decls [i];
if (decl->mode == dm_reserv)
DECL_RESERV (decl)->regexp
= process_regexp (DECL_RESERV (decl)->regexp);
else if (decl->mode == dm_insn_reserv)
DECL_INSN_RESERV (decl)->regexp
= process_regexp (DECL_INSN_RESERV (decl)->regexp);
}
}
/* The following function checks that declared unit is used. If the
unit is not used, the function fixes errors/warnings. The
following function must be called only after `process_decls',
`process_regexp_decls'. */
static void
check_usage (void)
{
decl_t decl;
int i;
for (i = 0; i < description->decls_num; i++)
{
decl = description->decls [i];
if (decl->mode == dm_unit && !DECL_UNIT (decl)->unit_is_used)
{
if (!w_flag)
error ("unit `%s' is not used", DECL_UNIT (decl)->name);
else
warning ("unit `%s' is not used", DECL_UNIT (decl)->name);
}
else if (decl->mode == dm_reserv && !DECL_RESERV (decl)->reserv_is_used)
{
if (!w_flag)
error ("reservation `%s' is not used", DECL_RESERV (decl)->name);
else
warning ("reservation `%s' is not used", DECL_RESERV (decl)->name);
}
}
}
/* The following variable value is number of reservation being
processed on loop recognition. */
static int curr_loop_pass_num;
/* The following recursive function returns nonzero value if REGEXP
contains given decl or reservations in given regexp refers for
given decl. */
static int
loop_in_regexp (regexp_t regexp, decl_t start_decl)
{
int i;
if (regexp == NULL)
return 0;
switch (regexp->mode)
{
case rm_unit:
return 0;
case rm_reserv:
if (start_decl->mode == dm_reserv
&& REGEXP_RESERV (regexp)->reserv_decl == DECL_RESERV (start_decl))
return 1;
else if (REGEXP_RESERV (regexp)->reserv_decl->loop_pass_num
== curr_loop_pass_num)
/* declaration has been processed. */
return 0;
else
{
REGEXP_RESERV (regexp)->reserv_decl->loop_pass_num
= curr_loop_pass_num;
return loop_in_regexp (REGEXP_RESERV (regexp)->reserv_decl->regexp,
start_decl);
}
case rm_sequence:
for (i = 0; i <REGEXP_SEQUENCE (regexp)->regexps_num; i++)
if (loop_in_regexp (REGEXP_SEQUENCE (regexp)->regexps [i], start_decl))
return 1;
return 0;
case rm_allof:
for (i = 0; i < REGEXP_ALLOF (regexp)->regexps_num; i++)
if (loop_in_regexp (REGEXP_ALLOF (regexp)->regexps [i], start_decl))
return 1;
return 0;
case rm_oneof:
for (i = 0; i < REGEXP_ONEOF (regexp)->regexps_num; i++)
if (loop_in_regexp (REGEXP_ONEOF (regexp)->regexps [i], start_decl))
return 1;
return 0;
case rm_repeat:
return loop_in_regexp (REGEXP_REPEAT (regexp)->regexp, start_decl);
case rm_nothing:
return 0;
default:
gcc_unreachable ();
}
}
/* The following function fixes errors "cycle in definition ...". The
function uses function `loop_in_regexp' for that. */
static void
check_loops_in_regexps (void)
{
decl_t decl;
int i;
for (i = 0; i < description->decls_num; i++)
{
decl = description->decls [i];
if (decl->mode == dm_reserv)
DECL_RESERV (decl)->loop_pass_num = 0;
}
for (i = 0; i < description->decls_num; i++)
{
decl = description->decls [i];
curr_loop_pass_num = i;
if (decl->mode == dm_reserv)
{
DECL_RESERV (decl)->loop_pass_num = curr_loop_pass_num;
if (loop_in_regexp (DECL_RESERV (decl)->regexp, decl))
{
gcc_assert (DECL_RESERV (decl)->regexp);
error ("cycle in definition of reservation `%s'",
DECL_RESERV (decl)->name);
}
}
}
}
/* The function recursively processes IR of reservation and defines
max and min cycle for reservation of unit. */
static void
process_regexp_cycles (regexp_t regexp, int max_start_cycle,
int min_start_cycle, int *max_finish_cycle,
int *min_finish_cycle)
{
int i;
switch (regexp->mode)
{
case rm_unit:
if (REGEXP_UNIT (regexp)->unit_decl->max_occ_cycle_num < max_start_cycle)
REGEXP_UNIT (regexp)->unit_decl->max_occ_cycle_num = max_start_cycle;
if (REGEXP_UNIT (regexp)->unit_decl->min_occ_cycle_num > min_start_cycle
|| REGEXP_UNIT (regexp)->unit_decl->min_occ_cycle_num == -1)
REGEXP_UNIT (regexp)->unit_decl->min_occ_cycle_num = min_start_cycle;
*max_finish_cycle = max_start_cycle;
*min_finish_cycle = min_start_cycle;
break;
case rm_reserv:
process_regexp_cycles (REGEXP_RESERV (regexp)->reserv_decl->regexp,
max_start_cycle, min_start_cycle,
max_finish_cycle, min_finish_cycle);
break;
case rm_repeat:
for (i = 0; i < REGEXP_REPEAT (regexp)->repeat_num; i++)
{
process_regexp_cycles (REGEXP_REPEAT (regexp)->regexp,
max_start_cycle, min_start_cycle,
max_finish_cycle, min_finish_cycle);
max_start_cycle = *max_finish_cycle + 1;
min_start_cycle = *min_finish_cycle + 1;
}
break;
case rm_sequence:
for (i = 0; i <REGEXP_SEQUENCE (regexp)->regexps_num; i++)
{
process_regexp_cycles (REGEXP_SEQUENCE (regexp)->regexps [i],
max_start_cycle, min_start_cycle,
max_finish_cycle, min_finish_cycle);
max_start_cycle = *max_finish_cycle + 1;
min_start_cycle = *min_finish_cycle + 1;
}
break;
case rm_allof:
{
int max_cycle = 0;
int min_cycle = 0;
for (i = 0; i < REGEXP_ALLOF (regexp)->regexps_num; i++)
{
process_regexp_cycles (REGEXP_ALLOF (regexp)->regexps [i],
max_start_cycle, min_start_cycle,
max_finish_cycle, min_finish_cycle);
if (max_cycle < *max_finish_cycle)
max_cycle = *max_finish_cycle;
if (i == 0 || min_cycle > *min_finish_cycle)
min_cycle = *min_finish_cycle;
}
*max_finish_cycle = max_cycle;
*min_finish_cycle = min_cycle;
}
break;
case rm_oneof:
{
int max_cycle = 0;
int min_cycle = 0;
for (i = 0; i < REGEXP_ONEOF (regexp)->regexps_num; i++)
{
process_regexp_cycles (REGEXP_ONEOF (regexp)->regexps [i],
max_start_cycle, min_start_cycle,
max_finish_cycle, min_finish_cycle);
if (max_cycle < *max_finish_cycle)
max_cycle = *max_finish_cycle;
if (i == 0 || min_cycle > *min_finish_cycle)
min_cycle = *min_finish_cycle;
}
*max_finish_cycle = max_cycle;
*min_finish_cycle = min_cycle;
}
break;
case rm_nothing:
*max_finish_cycle = max_start_cycle;
*min_finish_cycle = min_start_cycle;
break;
default:
gcc_unreachable ();
}
}
/* The following function is called only for correct program. The
function defines max reservation of insns in cycles. */
static void
evaluate_max_reserv_cycles (void)
{
int max_insn_cycles_num;
int min_insn_cycles_num;
decl_t decl;
int i;
description->max_insn_reserv_cycles = 0;
for (i = 0; i < description->decls_num; i++)
{
decl = description->decls [i];
if (decl->mode == dm_insn_reserv)
{
process_regexp_cycles (DECL_INSN_RESERV (decl)->regexp, 0, 0,
&max_insn_cycles_num, &min_insn_cycles_num);
if (description->max_insn_reserv_cycles < max_insn_cycles_num)
description->max_insn_reserv_cycles = max_insn_cycles_num;
}
}
description->max_insn_reserv_cycles++;
}
/* The following function calls functions for checking all
description. */
static void
check_all_description (void)
{
process_decls ();
check_automaton_usage ();
process_regexp_decls ();
check_usage ();
check_loops_in_regexps ();
if (!have_error)
evaluate_max_reserv_cycles ();
}
/* The page contains abstract data `ticker'. This data is used to
report time of different phases of building automata. It is
possibly to write a description for which automata will be built
during several minutes even on fast machine. */
/* The following function creates ticker and makes it active. */
static ticker_t
create_ticker (void)
{
ticker_t ticker;
ticker.modified_creation_time = get_run_time ();
ticker.incremented_off_time = 0;
return ticker;
}
/* The following function switches off given ticker. */
static void
ticker_off (ticker_t *ticker)
{
if (ticker->incremented_off_time == 0)
ticker->incremented_off_time = get_run_time () + 1;
}
/* The following function switches on given ticker. */
static void
ticker_on (ticker_t *ticker)
{
if (ticker->incremented_off_time != 0)
{
ticker->modified_creation_time
+= get_run_time () - ticker->incremented_off_time + 1;
ticker->incremented_off_time = 0;
}
}
/* The following function returns current time in milliseconds since
the moment when given ticker was created. */
static int
active_time (ticker_t ticker)
{
if (ticker.incremented_off_time != 0)
return ticker.incremented_off_time - 1 - ticker.modified_creation_time;
else
return get_run_time () - ticker.modified_creation_time;
}
/* The following function returns string representation of active time
of given ticker. The result is string representation of seconds
with accuracy of 1/100 second. Only result of the last call of the
function exists. Therefore the following code is not correct
printf ("parser time: %s\ngeneration time: %s\n",
active_time_string (parser_ticker),
active_time_string (generation_ticker));
Correct code has to be the following
printf ("parser time: %s\n", active_time_string (parser_ticker));
printf ("generation time: %s\n",
active_time_string (generation_ticker));
*/
static void
print_active_time (FILE *f, ticker_t ticker)
{
int msecs;
msecs = active_time (ticker);
fprintf (f, "%d.%06d", msecs / 1000000, msecs % 1000000);
}
/* The following variable value is number of automaton which are
really being created. This value is defined on the base of
argument of option `-split'. If the variable has zero value the
number of automata is defined by the constructions `%automaton'.
This case occurs when option `-split' is absent or has zero
argument. If constructions `define_automaton' is absent only one
automaton is created. */
static int automata_num;