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gnu / gcc / refs/tags/basepoints/gcc-13 / . / gcc / fortran / parse.cc
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/* Main parser.
Copyright (C) 2000-2022 Free Software Foundation, Inc.
Contributed by Andy Vaught
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/>. */
#include "config.h"
#include "system.h"
#include "coretypes.h"
#include "options.h"
#include "gfortran.h"
#include <setjmp.h>
#include "match.h"
#include "parse.h"
#include "tree-core.h"
#include "omp-general.h"
/* Current statement label. Zero means no statement label. Because new_st
can get wiped during statement matching, we have to keep it separate. */
gfc_st_label *gfc_statement_label;
static locus label_locus;
static jmp_buf eof_buf;
gfc_state_data *gfc_state_stack;
static bool last_was_use_stmt = false;
/* TODO: Re-order functions to kill these forward decls. */
static void check_statement_label (gfc_statement);
static void undo_new_statement (void);
static void reject_statement (void);
/* A sort of half-matching function. We try to match the word on the
input with the passed string. If this succeeds, we call the
keyword-dependent matching function that will match the rest of the
statement. For single keywords, the matching subroutine is
gfc_match_eos(). */
static match
match_word (const char *str, match (*subr) (void), locus *old_locus)
{
match m;
if (str != NULL)
{
m = gfc_match (str);
if (m != MATCH_YES)
return m;
}
m = (*subr) ();
if (m != MATCH_YES)
{
gfc_current_locus = *old_locus;
reject_statement ();
}
return m;
}
/* Like match_word, but if str is matched, set a flag that it
was matched. */
static match
match_word_omp_simd (const char *str, match (*subr) (void), locus *old_locus,
bool *simd_matched)
{
match m;
if (str != NULL)
{
m = gfc_match (str);
if (m != MATCH_YES)
return m;
*simd_matched = true;
}
m = (*subr) ();
if (m != MATCH_YES)
{
gfc_current_locus = *old_locus;
reject_statement ();
}
return m;
}
/* Load symbols from all USE statements encountered in this scoping unit. */
static void
use_modules (void)
{
gfc_error_buffer old_error;
gfc_push_error (&old_error);
gfc_buffer_error (false);
gfc_use_modules ();
gfc_buffer_error (true);
gfc_pop_error (&old_error);
gfc_commit_symbols ();
gfc_warning_check ();
gfc_current_ns->old_equiv = gfc_current_ns->equiv;
gfc_current_ns->old_data = gfc_current_ns->data;
last_was_use_stmt = false;
}
/* Figure out what the next statement is, (mostly) regardless of
proper ordering. The do...while(0) is there to prevent if/else
ambiguity. */
#define match(keyword, subr, st) \
do { \
if (match_word (keyword, subr, &old_locus) == MATCH_YES) \
return st; \
else \
undo_new_statement (); \
} while (0)
/* This is a specialist version of decode_statement that is used
for the specification statements in a function, whose
characteristics are deferred into the specification statements.
eg.: INTEGER (king = mykind) foo ()
USE mymodule, ONLY mykind.....
The KIND parameter needs a return after USE or IMPORT, whereas
derived type declarations can occur anywhere, up the executable
block. ST_GET_FCN_CHARACTERISTICS is returned when we have run
out of the correct kind of specification statements. */
static gfc_statement
decode_specification_statement (void)
{
gfc_statement st;
locus old_locus;
char c;
if (gfc_match_eos () == MATCH_YES)
return ST_NONE;
old_locus = gfc_current_locus;
if (match_word ("use", gfc_match_use, &old_locus) == MATCH_YES)
{
last_was_use_stmt = true;
return ST_USE;
}
else
{
undo_new_statement ();
if (last_was_use_stmt)
use_modules ();
}
match ("import", gfc_match_import, ST_IMPORT);
if (gfc_current_block ()->result->ts.type != BT_DERIVED)
goto end_of_block;
match (NULL, gfc_match_st_function, ST_STATEMENT_FUNCTION);
match (NULL, gfc_match_data_decl, ST_DATA_DECL);
match (NULL, gfc_match_enumerator_def, ST_ENUMERATOR);
/* General statement matching: Instead of testing every possible
statement, we eliminate most possibilities by peeking at the
first character. */
c = gfc_peek_ascii_char ();
switch (c)
{
case 'a':
match ("abstract% interface", gfc_match_abstract_interface,
ST_INTERFACE);
match ("allocatable", gfc_match_allocatable, ST_ATTR_DECL);
match ("asynchronous", gfc_match_asynchronous, ST_ATTR_DECL);
match ("automatic", gfc_match_automatic, ST_ATTR_DECL);
break;
case 'b':
match (NULL, gfc_match_bind_c_stmt, ST_ATTR_DECL);
break;
case 'c':
match ("codimension", gfc_match_codimension, ST_ATTR_DECL);
match ("contiguous", gfc_match_contiguous, ST_ATTR_DECL);
break;
case 'd':
match ("data", gfc_match_data, ST_DATA);
match ("dimension", gfc_match_dimension, ST_ATTR_DECL);
break;
case 'e':
match ("enum , bind ( c )", gfc_match_enum, ST_ENUM);
match ("entry% ", gfc_match_entry, ST_ENTRY);
match ("equivalence", gfc_match_equivalence, ST_EQUIVALENCE);
match ("external", gfc_match_external, ST_ATTR_DECL);
break;
case 'f':
match ("format", gfc_match_format, ST_FORMAT);
break;
case 'g':
break;
case 'i':
match ("implicit", gfc_match_implicit, ST_IMPLICIT);
match ("implicit% none", gfc_match_implicit_none, ST_IMPLICIT_NONE);
match ("interface", gfc_match_interface, ST_INTERFACE);
match ("intent", gfc_match_intent, ST_ATTR_DECL);
match ("intrinsic", gfc_match_intrinsic, ST_ATTR_DECL);
break;
case 'm':
break;
case 'n':
match ("namelist", gfc_match_namelist, ST_NAMELIST);
break;
case 'o':
match ("optional", gfc_match_optional, ST_ATTR_DECL);
break;
case 'p':
match ("parameter", gfc_match_parameter, ST_PARAMETER);
match ("pointer", gfc_match_pointer, ST_ATTR_DECL);
if (gfc_match_private (&st) == MATCH_YES)
return st;
match ("procedure", gfc_match_procedure, ST_PROCEDURE);
if (gfc_match_public (&st) == MATCH_YES)
return st;
match ("protected", gfc_match_protected, ST_ATTR_DECL);
break;
case 'r':
break;
case 's':
match ("save", gfc_match_save, ST_ATTR_DECL);
match ("static", gfc_match_static, ST_ATTR_DECL);
match ("structure", gfc_match_structure_decl, ST_STRUCTURE_DECL);
break;
case 't':
match ("target", gfc_match_target, ST_ATTR_DECL);
match ("type", gfc_match_derived_decl, ST_DERIVED_DECL);
break;
case 'u':
break;
case 'v':
match ("value", gfc_match_value, ST_ATTR_DECL);
match ("volatile", gfc_match_volatile, ST_ATTR_DECL);
break;
case 'w':
break;
}
/* This is not a specification statement. See if any of the matchers
has stored an error message of some sort. */
end_of_block:
gfc_clear_error ();
gfc_buffer_error (false);
gfc_current_locus = old_locus;
return ST_GET_FCN_CHARACTERISTICS;
}
static bool in_specification_block;
/* This is the primary 'decode_statement'. */
static gfc_statement
decode_statement (void)
{
gfc_statement st;
locus old_locus;
match m = MATCH_NO;
char c;
gfc_enforce_clean_symbol_state ();
gfc_clear_error (); /* Clear any pending errors. */
gfc_clear_warning (); /* Clear any pending warnings. */
gfc_matching_function = false;
if (gfc_match_eos () == MATCH_YES)
return ST_NONE;
if (gfc_current_state () == COMP_FUNCTION
&& gfc_current_block ()->result->ts.kind == -1)
return decode_specification_statement ();
old_locus = gfc_current_locus;
c = gfc_peek_ascii_char ();
if (c == 'u')
{
if (match_word ("use", gfc_match_use, &old_locus) == MATCH_YES)
{
last_was_use_stmt = true;
return ST_USE;
}
else
undo_new_statement ();
}
if (last_was_use_stmt)
use_modules ();
/* Try matching a data declaration or function declaration. The
input "REALFUNCTIONA(N)" can mean several things in different
contexts, so it (and its relatives) get special treatment. */
if (gfc_current_state () == COMP_NONE
|| gfc_current_state () == COMP_INTERFACE
|| gfc_current_state () == COMP_CONTAINS)
{
gfc_matching_function = true;
m = gfc_match_function_decl ();
if (m == MATCH_YES)
return ST_FUNCTION;
else if (m == MATCH_ERROR)
reject_statement ();
else
gfc_undo_symbols ();
gfc_current_locus = old_locus;
}
gfc_matching_function = false;
/* Legacy parameter statements are ambiguous with assignments so try parameter
first. */
match ("parameter", gfc_match_parameter, ST_PARAMETER);
/* Match statements whose error messages are meant to be overwritten
by something better. */
match (NULL, gfc_match_assignment, ST_ASSIGNMENT);
match (NULL, gfc_match_pointer_assignment, ST_POINTER_ASSIGNMENT);
if (in_specification_block)
{
m = match_word (NULL, gfc_match_st_function, &old_locus);
if (m == MATCH_YES)
return ST_STATEMENT_FUNCTION;
}
if (!(in_specification_block && m == MATCH_ERROR))
{
match (NULL, gfc_match_ptr_fcn_assign, ST_ASSIGNMENT);
}
match (NULL, gfc_match_data_decl, ST_DATA_DECL);
match (NULL, gfc_match_enumerator_def, ST_ENUMERATOR);
/* Try to match a subroutine statement, which has the same optional
prefixes that functions can have. */
if (gfc_match_subroutine () == MATCH_YES)
return ST_SUBROUTINE;
gfc_undo_symbols ();
gfc_current_locus = old_locus;
if (gfc_match_submod_proc () == MATCH_YES)
{
if (gfc_new_block->attr.subroutine)
return ST_SUBROUTINE;
else if (gfc_new_block->attr.function)
return ST_FUNCTION;
}
gfc_undo_symbols ();
gfc_current_locus = old_locus;
/* Check for the IF, DO, SELECT, WHERE, FORALL, CRITICAL, BLOCK and ASSOCIATE
statements, which might begin with a block label. The match functions for
these statements are unusual in that their keyword is not seen before
the matcher is called. */
if (gfc_match_if (&st) == MATCH_YES)
return st;
gfc_undo_symbols ();
gfc_current_locus = old_locus;
if (gfc_match_where (&st) == MATCH_YES)
return st;
gfc_undo_symbols ();
gfc_current_locus = old_locus;
if (gfc_match_forall (&st) == MATCH_YES)
return st;
gfc_undo_symbols ();
gfc_current_locus = old_locus;
/* Try to match TYPE as an alias for PRINT. */
if (gfc_match_type (&st) == MATCH_YES)
return st;
gfc_undo_symbols ();
gfc_current_locus = old_locus;
match (NULL, gfc_match_do, ST_DO);
match (NULL, gfc_match_block, ST_BLOCK);
match (NULL, gfc_match_associate, ST_ASSOCIATE);
match (NULL, gfc_match_critical, ST_CRITICAL);
match (NULL, gfc_match_select, ST_SELECT_CASE);
match (NULL, gfc_match_select_type, ST_SELECT_TYPE);
match (NULL, gfc_match_select_rank, ST_SELECT_RANK);
/* General statement matching: Instead of testing every possible
statement, we eliminate most possibilities by peeking at the
first character. */
switch (c)
{
case 'a':
match ("abstract% interface", gfc_match_abstract_interface,
ST_INTERFACE);
match ("allocate", gfc_match_allocate, ST_ALLOCATE);
match ("allocatable", gfc_match_allocatable, ST_ATTR_DECL);
match ("assign", gfc_match_assign, ST_LABEL_ASSIGNMENT);
match ("asynchronous", gfc_match_asynchronous, ST_ATTR_DECL);
match ("automatic", gfc_match_automatic, ST_ATTR_DECL);
break;
case 'b':
match ("backspace", gfc_match_backspace, ST_BACKSPACE);
match ("block data", gfc_match_block_data, ST_BLOCK_DATA);
match (NULL, gfc_match_bind_c_stmt, ST_ATTR_DECL);
break;
case 'c':
match ("call", gfc_match_call, ST_CALL);
match ("change team", gfc_match_change_team, ST_CHANGE_TEAM);
match ("close", gfc_match_close, ST_CLOSE);
match ("continue", gfc_match_continue, ST_CONTINUE);
match ("contiguous", gfc_match_contiguous, ST_ATTR_DECL);
match ("cycle", gfc_match_cycle, ST_CYCLE);
match ("case", gfc_match_case, ST_CASE);
match ("common", gfc_match_common, ST_COMMON);
match ("contains", gfc_match_eos, ST_CONTAINS);
match ("class", gfc_match_class_is, ST_CLASS_IS);
match ("codimension", gfc_match_codimension, ST_ATTR_DECL);
break;
case 'd':
match ("deallocate", gfc_match_deallocate, ST_DEALLOCATE);
match ("data", gfc_match_data, ST_DATA);
match ("dimension", gfc_match_dimension, ST_ATTR_DECL);
break;
case 'e':
match ("end file", gfc_match_endfile, ST_END_FILE);
match ("end team", gfc_match_end_team, ST_END_TEAM);
match ("exit", gfc_match_exit, ST_EXIT);
match ("else", gfc_match_else, ST_ELSE);
match ("else where", gfc_match_elsewhere, ST_ELSEWHERE);
match ("else if", gfc_match_elseif, ST_ELSEIF);
match ("error stop", gfc_match_error_stop, ST_ERROR_STOP);
match ("enum , bind ( c )", gfc_match_enum, ST_ENUM);
if (gfc_match_end (&st) == MATCH_YES)
return st;
match ("entry% ", gfc_match_entry, ST_ENTRY);
match ("equivalence", gfc_match_equivalence, ST_EQUIVALENCE);
match ("external", gfc_match_external, ST_ATTR_DECL);
match ("event post", gfc_match_event_post, ST_EVENT_POST);
match ("event wait", gfc_match_event_wait, ST_EVENT_WAIT);
break;
case 'f':
match ("fail image", gfc_match_fail_image, ST_FAIL_IMAGE);
match ("final", gfc_match_final_decl, ST_FINAL);
match ("flush", gfc_match_flush, ST_FLUSH);
match ("form team", gfc_match_form_team, ST_FORM_TEAM);
match ("format", gfc_match_format, ST_FORMAT);
break;
case 'g':
match ("generic", gfc_match_generic, ST_GENERIC);
match ("go to", gfc_match_goto, ST_GOTO);
break;
case 'i':
match ("inquire", gfc_match_inquire, ST_INQUIRE);
match ("implicit", gfc_match_implicit, ST_IMPLICIT);
match ("implicit% none", gfc_match_implicit_none, ST_IMPLICIT_NONE);
match ("import", gfc_match_import, ST_IMPORT);
match ("interface", gfc_match_interface, ST_INTERFACE);
match ("intent", gfc_match_intent, ST_ATTR_DECL);
match ("intrinsic", gfc_match_intrinsic, ST_ATTR_DECL);
break;
case 'l':
match ("lock", gfc_match_lock, ST_LOCK);
break;
case 'm':
match ("map", gfc_match_map, ST_MAP);
match ("module% procedure", gfc_match_modproc, ST_MODULE_PROC);
match ("module", gfc_match_module, ST_MODULE);
break;
case 'n':
match ("nullify", gfc_match_nullify, ST_NULLIFY);
match ("namelist", gfc_match_namelist, ST_NAMELIST);
break;
case 'o':
match ("open", gfc_match_open, ST_OPEN);
match ("optional", gfc_match_optional, ST_ATTR_DECL);
break;
case 'p':
match ("print", gfc_match_print, ST_WRITE);
match ("pause", gfc_match_pause, ST_PAUSE);
match ("pointer", gfc_match_pointer, ST_ATTR_DECL);
if (gfc_match_private (&st) == MATCH_YES)
return st;
match ("procedure", gfc_match_procedure, ST_PROCEDURE);
match ("program", gfc_match_program, ST_PROGRAM);
if (gfc_match_public (&st) == MATCH_YES)
return st;
match ("protected", gfc_match_protected, ST_ATTR_DECL);
break;
case 'r':
match ("rank", gfc_match_rank_is, ST_RANK);
match ("read", gfc_match_read, ST_READ);
match ("return", gfc_match_return, ST_RETURN);
match ("rewind", gfc_match_rewind, ST_REWIND);
break;
case 's':
match ("structure", gfc_match_structure_decl, ST_STRUCTURE_DECL);
match ("sequence", gfc_match_eos, ST_SEQUENCE);
match ("stop", gfc_match_stop, ST_STOP);
match ("save", gfc_match_save, ST_ATTR_DECL);
match ("static", gfc_match_static, ST_ATTR_DECL);
match ("submodule", gfc_match_submodule, ST_SUBMODULE);
match ("sync all", gfc_match_sync_all, ST_SYNC_ALL);
match ("sync images", gfc_match_sync_images, ST_SYNC_IMAGES);
match ("sync memory", gfc_match_sync_memory, ST_SYNC_MEMORY);
match ("sync team", gfc_match_sync_team, ST_SYNC_TEAM);
break;
case 't':
match ("target", gfc_match_target, ST_ATTR_DECL);
match ("type", gfc_match_derived_decl, ST_DERIVED_DECL);
match ("type is", gfc_match_type_is, ST_TYPE_IS);
break;
case 'u':
match ("union", gfc_match_union, ST_UNION);
match ("unlock", gfc_match_unlock, ST_UNLOCK);
break;
case 'v':
match ("value", gfc_match_value, ST_ATTR_DECL);
match ("volatile", gfc_match_volatile, ST_ATTR_DECL);
break;
case 'w':
match ("wait", gfc_match_wait, ST_WAIT);
match ("write", gfc_match_write, ST_WRITE);
break;
}
/* All else has failed, so give up. See if any of the matchers has
stored an error message of some sort. Suppress the "Unclassifiable
statement" if a previous error message was emitted, e.g., by
gfc_error_now (). */
if (!gfc_error_check ())
{
int ecnt;
gfc_get_errors (NULL, &ecnt);
if (ecnt <= 0)
gfc_error_now ("Unclassifiable statement at %C");
}
reject_statement ();
gfc_error_recovery ();
return ST_NONE;
}
/* Like match and if spec_only, goto do_spec_only without actually
matching. */
/* If the directive matched but the clauses failed, do not start
matching the next directive in the same switch statement. */
#define matcha(keyword, subr, st) \
do { \
match m2; \
if (spec_only && gfc_match (keyword) == MATCH_YES) \
goto do_spec_only; \
else if ((m2 = match_word (keyword, subr, &old_locus)) \
== MATCH_YES) \
return st; \
else if (m2 == MATCH_ERROR) \
goto error_handling; \
else \
undo_new_statement (); \
} while (0)
static gfc_statement
decode_oacc_directive (void)
{
locus old_locus;
char c;
bool spec_only = false;
gfc_enforce_clean_symbol_state ();
gfc_clear_error (); /* Clear any pending errors. */
gfc_clear_warning (); /* Clear any pending warnings. */
gfc_matching_function = false;
if (gfc_current_state () == COMP_FUNCTION
&& gfc_current_block ()->result->ts.kind == -1)
spec_only = true;
old_locus = gfc_current_locus;
/* General OpenACC directive matching: Instead of testing every possible
statement, we eliminate most possibilities by peeking at the
first character. */
c = gfc_peek_ascii_char ();
switch (c)
{
case 'r':
matcha ("routine", gfc_match_oacc_routine, ST_OACC_ROUTINE);
break;
}
gfc_unset_implicit_pure (NULL);
if (gfc_pure (NULL))
{
gfc_error_now ("OpenACC directives other than ROUTINE may not appear in PURE "
"procedures at %C");
goto error_handling;
}
switch (c)
{
case 'a':
matcha ("atomic", gfc_match_oacc_atomic, ST_OACC_ATOMIC);
break;
case 'c':
matcha ("cache", gfc_match_oacc_cache, ST_OACC_CACHE);
break;
case 'd':
matcha ("data", gfc_match_oacc_data, ST_OACC_DATA);
match ("declare", gfc_match_oacc_declare, ST_OACC_DECLARE);
break;
case 'e':
matcha ("end atomic", gfc_match_omp_eos_error, ST_OACC_END_ATOMIC);
matcha ("end data", gfc_match_omp_eos_error, ST_OACC_END_DATA);
matcha ("end host_data", gfc_match_omp_eos_error, ST_OACC_END_HOST_DATA);
matcha ("end kernels loop", gfc_match_omp_eos_error, ST_OACC_END_KERNELS_LOOP);
matcha ("end kernels", gfc_match_omp_eos_error, ST_OACC_END_KERNELS);
matcha ("end loop", gfc_match_omp_eos_error, ST_OACC_END_LOOP);
matcha ("end parallel loop", gfc_match_omp_eos_error,
ST_OACC_END_PARALLEL_LOOP);
matcha ("end parallel", gfc_match_omp_eos_error, ST_OACC_END_PARALLEL);
matcha ("end serial loop", gfc_match_omp_eos_error,
ST_OACC_END_SERIAL_LOOP);
matcha ("end serial", gfc_match_omp_eos_error, ST_OACC_END_SERIAL);
matcha ("enter data", gfc_match_oacc_enter_data, ST_OACC_ENTER_DATA);
matcha ("exit data", gfc_match_oacc_exit_data, ST_OACC_EXIT_DATA);
break;
case 'h':
matcha ("host_data", gfc_match_oacc_host_data, ST_OACC_HOST_DATA);
break;
case 'p':
matcha ("parallel loop", gfc_match_oacc_parallel_loop,
ST_OACC_PARALLEL_LOOP);
matcha ("parallel", gfc_match_oacc_parallel, ST_OACC_PARALLEL);
break;
case 'k':
matcha ("kernels loop", gfc_match_oacc_kernels_loop,
ST_OACC_KERNELS_LOOP);
matcha ("kernels", gfc_match_oacc_kernels, ST_OACC_KERNELS);
break;
case 'l':
matcha ("loop", gfc_match_oacc_loop, ST_OACC_LOOP);
break;
case 's':
matcha ("serial loop", gfc_match_oacc_serial_loop, ST_OACC_SERIAL_LOOP);
matcha ("serial", gfc_match_oacc_serial, ST_OACC_SERIAL);
break;
case 'u':
matcha ("update", gfc_match_oacc_update, ST_OACC_UPDATE);
break;
case 'w':
matcha ("wait", gfc_match_oacc_wait, ST_OACC_WAIT);
break;
}
/* Directive not found or stored an error message.
Check and give up. */
error_handling:
if (gfc_error_check () == 0)
gfc_error_now ("Unclassifiable OpenACC directive at %C");
reject_statement ();
gfc_error_recovery ();
return ST_NONE;
do_spec_only:
reject_statement ();
gfc_clear_error ();
gfc_buffer_error (false);
gfc_current_locus = old_locus;
return ST_GET_FCN_CHARACTERISTICS;
}
/* Like match, but set a flag simd_matched if keyword matched
and if spec_only, goto do_spec_only without actually matching. */
#define matchs(keyword, subr, st) \
do { \
match m2; \
if (spec_only && gfc_match (keyword) == MATCH_YES) \
goto do_spec_only; \
if ((m2 = match_word_omp_simd (keyword, subr, &old_locus, \
&simd_matched)) == MATCH_YES) \
{ \
ret = st; \
goto finish; \
} \
else if (m2 == MATCH_ERROR) \
goto error_handling; \
else \
undo_new_statement (); \
} while (0)
/* Like match, but don't match anything if not -fopenmp
and if spec_only, goto do_spec_only without actually matching. */
/* If the directive matched but the clauses failed, do not start
matching the next directive in the same switch statement. */
#define matcho(keyword, subr, st) \
do { \
match m2; \
if (!flag_openmp) \
; \
else if (spec_only && gfc_match (keyword) == MATCH_YES) \
goto do_spec_only; \
else if ((m2 = match_word (keyword, subr, &old_locus)) \
== MATCH_YES) \
{ \
ret = st; \
goto finish; \
} \
else if (m2 == MATCH_ERROR) \
goto error_handling; \
else \
undo_new_statement (); \
} while (0)
/* Like match, but set a flag simd_matched if keyword matched. */
#define matchds(keyword, subr, st) \
do { \
match m2; \
if ((m2 = match_word_omp_simd (keyword, subr, &old_locus, \
&simd_matched)) == MATCH_YES) \
{ \
ret = st; \
goto finish; \
} \
else if (m2 == MATCH_ERROR) \
goto error_handling; \
else \
undo_new_statement (); \
} while (0)
/* Like match, but don't match anything if not -fopenmp. */
#define matchdo(keyword, subr, st) \
do { \
match m2; \
if (!flag_openmp) \
; \
else if ((m2 = match_word (keyword, subr, &old_locus)) \
== MATCH_YES) \
{ \
ret = st; \
goto finish; \
} \
else if (m2 == MATCH_ERROR) \
goto error_handling; \
else \
undo_new_statement (); \
} while (0)
static gfc_statement
decode_omp_directive (void)
{
locus old_locus;
char c;
bool simd_matched = false;
bool spec_only = false;
gfc_statement ret = ST_NONE;
bool pure_ok = true;
gfc_enforce_clean_symbol_state ();
gfc_clear_error (); /* Clear any pending errors. */
gfc_clear_warning (); /* Clear any pending warnings. */
gfc_matching_function = false;
if (gfc_current_state () == COMP_FUNCTION
&& gfc_current_block ()->result->ts.kind == -1)
spec_only = true;
old_locus = gfc_current_locus;
/* General OpenMP directive matching: Instead of testing every possible
statement, we eliminate most possibilities by peeking at the
first character. */
c = gfc_peek_ascii_char ();
/* match is for directives that should be recognized only if
-fopenmp, matchs for directives that should be recognized
if either -fopenmp or -fopenmp-simd.
Handle only the directives allowed in PURE procedures
first (those also shall not turn off implicit pure). */
switch (c)
{
case 'd':
matchds ("declare simd", gfc_match_omp_declare_simd,
ST_OMP_DECLARE_SIMD);
matchdo ("declare target", gfc_match_omp_declare_target,
ST_OMP_DECLARE_TARGET);
matchdo ("declare variant", gfc_match_omp_declare_variant,
ST_OMP_DECLARE_VARIANT);
break;
case 's':
matchs ("simd", gfc_match_omp_simd, ST_OMP_SIMD);
break;
}
pure_ok = false;
if (flag_openmp && gfc_pure (NULL))
{
gfc_error_now ("OpenMP directives other than SIMD or DECLARE TARGET "
"at %C may not appear in PURE procedures");
gfc_error_recovery ();
return ST_NONE;
}
/* match is for directives that should be recognized only if
-fopenmp, matchs for directives that should be recognized
if either -fopenmp or -fopenmp-simd. */
switch (c)
{
case 'a':
matcho ("atomic", gfc_match_omp_atomic, ST_OMP_ATOMIC);
break;
case 'b':
matcho ("barrier", gfc_match_omp_barrier, ST_OMP_BARRIER);
break;
case 'c':
matcho ("cancellation% point", gfc_match_omp_cancellation_point,
ST_OMP_CANCELLATION_POINT);
matcho ("cancel", gfc_match_omp_cancel, ST_OMP_CANCEL);
matcho ("critical", gfc_match_omp_critical, ST_OMP_CRITICAL);
break;
case 'd':
matchds ("declare reduction", gfc_match_omp_declare_reduction,
ST_OMP_DECLARE_REDUCTION);
matcho ("depobj", gfc_match_omp_depobj, ST_OMP_DEPOBJ);
matchs ("distribute parallel do simd",
gfc_match_omp_distribute_parallel_do_simd,
ST_OMP_DISTRIBUTE_PARALLEL_DO_SIMD);
matcho ("distribute parallel do", gfc_match_omp_distribute_parallel_do,
ST_OMP_DISTRIBUTE_PARALLEL_DO);
matchs ("distribute simd", gfc_match_omp_distribute_simd,
ST_OMP_DISTRIBUTE_SIMD);
matcho ("distribute", gfc_match_omp_distribute, ST_OMP_DISTRIBUTE);
matchs ("do simd", gfc_match_omp_do_simd, ST_OMP_DO_SIMD);
matcho ("do", gfc_match_omp_do, ST_OMP_DO);
break;
case 'e':
matcho ("error", gfc_match_omp_error, ST_OMP_ERROR);
matcho ("end atomic", gfc_match_omp_eos_error, ST_OMP_END_ATOMIC);
matcho ("end critical", gfc_match_omp_end_critical, ST_OMP_END_CRITICAL);
matchs ("end distribute parallel do simd", gfc_match_omp_eos_error,
ST_OMP_END_DISTRIBUTE_PARALLEL_DO_SIMD);
matcho ("end distribute parallel do", gfc_match_omp_eos_error,
ST_OMP_END_DISTRIBUTE_PARALLEL_DO);
matchs ("end distribute simd", gfc_match_omp_eos_error,
ST_OMP_END_DISTRIBUTE_SIMD);
matcho ("end distribute", gfc_match_omp_eos_error, ST_OMP_END_DISTRIBUTE);
matchs ("end do simd", gfc_match_omp_end_nowait, ST_OMP_END_DO_SIMD);
matcho ("end do", gfc_match_omp_end_nowait, ST_OMP_END_DO);
matcho ("end loop", gfc_match_omp_eos_error, ST_OMP_END_LOOP);
matchs ("end simd", gfc_match_omp_eos_error, ST_OMP_END_SIMD);
matcho ("end masked taskloop simd", gfc_match_omp_eos_error,
ST_OMP_END_MASKED_TASKLOOP_SIMD);
matcho ("end masked taskloop", gfc_match_omp_eos_error,
ST_OMP_END_MASKED_TASKLOOP);
matcho ("end masked", gfc_match_omp_eos_error, ST_OMP_END_MASKED);
matcho ("end master taskloop simd", gfc_match_omp_eos_error,
ST_OMP_END_MASTER_TASKLOOP_SIMD);
matcho ("end master taskloop", gfc_match_omp_eos_error,
ST_OMP_END_MASTER_TASKLOOP);
matcho ("end master", gfc_match_omp_eos_error, ST_OMP_END_MASTER);
matchs ("end ordered", gfc_match_omp_eos_error, ST_OMP_END_ORDERED);
matchs ("end parallel do simd", gfc_match_omp_eos_error,
ST_OMP_END_PARALLEL_DO_SIMD);
matcho ("end parallel do", gfc_match_omp_eos_error, ST_OMP_END_PARALLEL_DO);
matcho ("end parallel loop", gfc_match_omp_eos_error,
ST_OMP_END_PARALLEL_LOOP);
matcho ("end parallel masked taskloop simd", gfc_match_omp_eos_error,
ST_OMP_END_PARALLEL_MASKED_TASKLOOP_SIMD);
matcho ("end parallel masked taskloop", gfc_match_omp_eos_error,
ST_OMP_END_PARALLEL_MASKED_TASKLOOP);
matcho ("end parallel masked", gfc_match_omp_eos_error,
ST_OMP_END_PARALLEL_MASKED);
matcho ("end parallel master taskloop simd", gfc_match_omp_eos_error,
ST_OMP_END_PARALLEL_MASTER_TASKLOOP_SIMD);
matcho ("end parallel master taskloop", gfc_match_omp_eos_error,
ST_OMP_END_PARALLEL_MASTER_TASKLOOP);
matcho ("end parallel master", gfc_match_omp_eos_error,
ST_OMP_END_PARALLEL_MASTER);
matcho ("end parallel sections", gfc_match_omp_eos_error,
ST_OMP_END_PARALLEL_SECTIONS);
matcho ("end parallel workshare", gfc_match_omp_eos_error,
ST_OMP_END_PARALLEL_WORKSHARE);
matcho ("end parallel", gfc_match_omp_eos_error, ST_OMP_END_PARALLEL);
matcho ("end scope", gfc_match_omp_end_nowait, ST_OMP_END_SCOPE);
matcho ("end sections", gfc_match_omp_end_nowait, ST_OMP_END_SECTIONS);
matcho ("end single", gfc_match_omp_end_single, ST_OMP_END_SINGLE);
matcho ("end target data", gfc_match_omp_eos_error, ST_OMP_END_TARGET_DATA);
matchs ("end target parallel do simd", gfc_match_omp_end_nowait,
ST_OMP_END_TARGET_PARALLEL_DO_SIMD);
matcho ("end target parallel do", gfc_match_omp_end_nowait,
ST_OMP_END_TARGET_PARALLEL_DO);
matcho ("end target parallel loop", gfc_match_omp_end_nowait,
ST_OMP_END_TARGET_PARALLEL_LOOP);
matcho ("end target parallel", gfc_match_omp_end_nowait,
ST_OMP_END_TARGET_PARALLEL);
matchs ("end target simd", gfc_match_omp_end_nowait, ST_OMP_END_TARGET_SIMD);
matchs ("end target teams distribute parallel do simd",
gfc_match_omp_end_nowait,
ST_OMP_END_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD);
matcho ("end target teams distribute parallel do", gfc_match_omp_end_nowait,
ST_OMP_END_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO);
matchs ("end target teams distribute simd", gfc_match_omp_end_nowait,
ST_OMP_END_TARGET_TEAMS_DISTRIBUTE_SIMD);
matcho ("end target teams distribute", gfc_match_omp_end_nowait,
ST_OMP_END_TARGET_TEAMS_DISTRIBUTE);
matcho ("end target teams loop", gfc_match_omp_end_nowait,
ST_OMP_END_TARGET_TEAMS_LOOP);
matcho ("end target teams", gfc_match_omp_end_nowait,
ST_OMP_END_TARGET_TEAMS);
matcho ("end target", gfc_match_omp_end_nowait, ST_OMP_END_TARGET);
matcho ("end taskgroup", gfc_match_omp_eos_error, ST_OMP_END_TASKGROUP);
matchs ("end taskloop simd", gfc_match_omp_eos_error,
ST_OMP_END_TASKLOOP_SIMD);
matcho ("end taskloop", gfc_match_omp_eos_error, ST_OMP_END_TASKLOOP);
matcho ("end task", gfc_match_omp_eos_error, ST_OMP_END_TASK);
matchs ("end teams distribute parallel do simd", gfc_match_omp_eos_error,
ST_OMP_END_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD);
matcho ("end teams distribute parallel do", gfc_match_omp_eos_error,
ST_OMP_END_TEAMS_DISTRIBUTE_PARALLEL_DO);
matchs ("end teams distribute simd", gfc_match_omp_eos_error,
ST_OMP_END_TEAMS_DISTRIBUTE_SIMD);
matcho ("end teams distribute", gfc_match_omp_eos_error,
ST_OMP_END_TEAMS_DISTRIBUTE);
matcho ("end teams loop", gfc_match_omp_eos_error, ST_OMP_END_TEAMS_LOOP);
matcho ("end teams", gfc_match_omp_eos_error, ST_OMP_END_TEAMS);
matcho ("end workshare", gfc_match_omp_end_nowait,
ST_OMP_END_WORKSHARE);
break;
case 'f':
matcho ("flush", gfc_match_omp_flush, ST_OMP_FLUSH);
break;
case 'm':
matcho ("masked taskloop simd", gfc_match_omp_masked_taskloop_simd,
ST_OMP_MASKED_TASKLOOP_SIMD);
matcho ("masked taskloop", gfc_match_omp_masked_taskloop,
ST_OMP_MASKED_TASKLOOP);
matcho ("masked", gfc_match_omp_masked, ST_OMP_MASKED);
matcho ("master taskloop simd", gfc_match_omp_master_taskloop_simd,
ST_OMP_MASTER_TASKLOOP_SIMD);
matcho ("master taskloop", gfc_match_omp_master_taskloop,
ST_OMP_MASTER_TASKLOOP);
matcho ("master", gfc_match_omp_master, ST_OMP_MASTER);
break;
case 'n':
matcho ("nothing", gfc_match_omp_nothing, ST_NONE);
break;
case 'l':
matcho ("loop", gfc_match_omp_loop, ST_OMP_LOOP);
break;
case 'o':
if (gfc_match ("ordered depend (") == MATCH_YES)
{
gfc_current_locus = old_locus;
if (!flag_openmp)
break;
matcho ("ordered", gfc_match_omp_ordered_depend,
ST_OMP_ORDERED_DEPEND);
}
else
matchs ("ordered", gfc_match_omp_ordered, ST_OMP_ORDERED);
break;
case 'p':
matchs ("parallel do simd", gfc_match_omp_parallel_do_simd,
ST_OMP_PARALLEL_DO_SIMD);
matcho ("parallel do", gfc_match_omp_parallel_do, ST_OMP_PARALLEL_DO);
matcho ("parallel loop", gfc_match_omp_parallel_loop,
ST_OMP_PARALLEL_LOOP);
matcho ("parallel masked taskloop simd",
gfc_match_omp_parallel_masked_taskloop_simd,
ST_OMP_PARALLEL_MASKED_TASKLOOP_SIMD);
matcho ("parallel masked taskloop",
gfc_match_omp_parallel_masked_taskloop,
ST_OMP_PARALLEL_MASKED_TASKLOOP);
matcho ("parallel masked", gfc_match_omp_parallel_masked,
ST_OMP_PARALLEL_MASKED);
matcho ("parallel master taskloop simd",
gfc_match_omp_parallel_master_taskloop_simd,
ST_OMP_PARALLEL_MASTER_TASKLOOP_SIMD);
matcho ("parallel master taskloop",
gfc_match_omp_parallel_master_taskloop,
ST_OMP_PARALLEL_MASTER_TASKLOOP);
matcho ("parallel master", gfc_match_omp_parallel_master,
ST_OMP_PARALLEL_MASTER);
matcho ("parallel sections", gfc_match_omp_parallel_sections,
ST_OMP_PARALLEL_SECTIONS);
matcho ("parallel workshare", gfc_match_omp_parallel_workshare,
ST_OMP_PARALLEL_WORKSHARE);
matcho ("parallel", gfc_match_omp_parallel, ST_OMP_PARALLEL);
break;
case 'r':
matcho ("requires", gfc_match_omp_requires, ST_OMP_REQUIRES);
break;
case 's':
matcho ("scan", gfc_match_omp_scan, ST_OMP_SCAN);
matcho ("scope", gfc_match_omp_scope, ST_OMP_SCOPE);
matcho ("sections", gfc_match_omp_sections, ST_OMP_SECTIONS);
matcho ("section", gfc_match_omp_eos_error, ST_OMP_SECTION);
matcho ("single", gfc_match_omp_single, ST_OMP_SINGLE);
break;
case 't':
matcho ("target data", gfc_match_omp_target_data, ST_OMP_TARGET_DATA);
matcho ("target enter data", gfc_match_omp_target_enter_data,
ST_OMP_TARGET_ENTER_DATA);
matcho ("target exit data", gfc_match_omp_target_exit_data,
ST_OMP_TARGET_EXIT_DATA);
matchs ("target parallel do simd", gfc_match_omp_target_parallel_do_simd,
ST_OMP_TARGET_PARALLEL_DO_SIMD);
matcho ("target parallel do", gfc_match_omp_target_parallel_do,
ST_OMP_TARGET_PARALLEL_DO);
matcho ("target parallel loop", gfc_match_omp_target_parallel_loop,
ST_OMP_TARGET_PARALLEL_LOOP);
matcho ("target parallel", gfc_match_omp_target_parallel,
ST_OMP_TARGET_PARALLEL);
matchs ("target simd", gfc_match_omp_target_simd, ST_OMP_TARGET_SIMD);
matchs ("target teams distribute parallel do simd",
gfc_match_omp_target_teams_distribute_parallel_do_simd,
ST_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD);
matcho ("target teams distribute parallel do",
gfc_match_omp_target_teams_distribute_parallel_do,
ST_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO);
matchs ("target teams distribute simd",
gfc_match_omp_target_teams_distribute_simd,
ST_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD);
matcho ("target teams distribute", gfc_match_omp_target_teams_distribute,
ST_OMP_TARGET_TEAMS_DISTRIBUTE);
matcho ("target teams loop", gfc_match_omp_target_teams_loop,
ST_OMP_TARGET_TEAMS_LOOP);
matcho ("target teams", gfc_match_omp_target_teams, ST_OMP_TARGET_TEAMS);
matcho ("target update", gfc_match_omp_target_update,
ST_OMP_TARGET_UPDATE);
matcho ("target", gfc_match_omp_target, ST_OMP_TARGET);
matcho ("taskgroup", gfc_match_omp_taskgroup, ST_OMP_TASKGROUP);
matchs ("taskloop simd", gfc_match_omp_taskloop_simd,
ST_OMP_TASKLOOP_SIMD);
matcho ("taskloop", gfc_match_omp_taskloop, ST_OMP_TASKLOOP);
matcho ("taskwait", gfc_match_omp_taskwait, ST_OMP_TASKWAIT);
matcho ("taskyield", gfc_match_omp_taskyield, ST_OMP_TASKYIELD);
matcho ("task", gfc_match_omp_task, ST_OMP_TASK);
matchs ("teams distribute parallel do simd",
gfc_match_omp_teams_distribute_parallel_do_simd,
ST_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD);
matcho ("teams distribute parallel do",
gfc_match_omp_teams_distribute_parallel_do,
ST_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO);
matchs ("teams distribute simd", gfc_match_omp_teams_distribute_simd,
ST_OMP_TEAMS_DISTRIBUTE_SIMD);
matcho ("teams distribute", gfc_match_omp_teams_distribute,
ST_OMP_TEAMS_DISTRIBUTE);
matcho ("teams loop", gfc_match_omp_teams_loop, ST_OMP_TEAMS_LOOP);
matcho ("teams", gfc_match_omp_teams, ST_OMP_TEAMS);
matchdo ("threadprivate", gfc_match_omp_threadprivate,
ST_OMP_THREADPRIVATE);
break;
case 'w':
matcho ("workshare", gfc_match_omp_workshare, ST_OMP_WORKSHARE);
break;
}
/* All else has failed, so give up. See if any of the matchers has
stored an error message of some sort. Don't error out if
not -fopenmp and simd_matched is false, i.e. if a directive other
than one marked with match has been seen. */
error_handling:
if (flag_openmp || simd_matched)
{
if (!gfc_error_check ())
gfc_error_now ("Unclassifiable OpenMP directive at %C");
}
reject_statement ();
gfc_error_recovery ();
return ST_NONE;
finish:
if (!pure_ok)
{
gfc_unset_implicit_pure (NULL);
if (!flag_openmp && gfc_pure (NULL))
{
gfc_error_now ("OpenMP directives other than SIMD or DECLARE TARGET "
"at %C may not appear in PURE procedures");
reject_statement ();
gfc_error_recovery ();
return ST_NONE;
}
}
switch (ret)
{
case ST_OMP_DECLARE_TARGET:
case ST_OMP_TARGET:
case ST_OMP_TARGET_DATA:
case ST_OMP_TARGET_ENTER_DATA:
case ST_OMP_TARGET_EXIT_DATA:
case ST_OMP_TARGET_TEAMS:
case ST_OMP_TARGET_TEAMS_DISTRIBUTE:
case ST_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD:
case ST_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO:
case ST_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD:
case ST_OMP_TARGET_TEAMS_LOOP:
case ST_OMP_TARGET_PARALLEL:
case ST_OMP_TARGET_PARALLEL_DO:
case ST_OMP_TARGET_PARALLEL_DO_SIMD:
case ST_OMP_TARGET_PARALLEL_LOOP:
case ST_OMP_TARGET_SIMD:
case ST_OMP_TARGET_UPDATE:
{
gfc_namespace *prog_unit = gfc_current_ns;
while (prog_unit->parent)
{
if (gfc_state_stack->previous
&& gfc_state_stack->previous->state == COMP_INTERFACE)
break;
prog_unit = prog_unit->parent;
}
prog_unit->omp_target_seen = true;
break;
}
case ST_OMP_ERROR:
if (new_st.ext.omp_clauses->at != OMP_AT_EXECUTION)
return ST_NONE;
default:
break;
}
return ret;
do_spec_only:
reject_statement ();
gfc_clear_error ();
gfc_buffer_error (false);
gfc_current_locus = old_locus;
return ST_GET_FCN_CHARACTERISTICS;
}
static gfc_statement
decode_gcc_attribute (void)
{
locus old_locus;
gfc_enforce_clean_symbol_state ();
gfc_clear_error (); /* Clear any pending errors. */
gfc_clear_warning (); /* Clear any pending warnings. */
old_locus = gfc_current_locus;
match ("attributes", gfc_match_gcc_attributes, ST_ATTR_DECL);
match ("unroll", gfc_match_gcc_unroll, ST_NONE);
match ("builtin", gfc_match_gcc_builtin, ST_NONE);
match ("ivdep", gfc_match_gcc_ivdep, ST_NONE);
match ("vector", gfc_match_gcc_vector, ST_NONE);
match ("novector", gfc_match_gcc_novector, ST_NONE);
/* All else has failed, so give up. See if any of the matchers has
stored an error message of some sort. */
if (!gfc_error_check ())
{
if (pedantic)
gfc_error_now ("Unclassifiable GCC directive at %C");
else
gfc_warning_now (0, "Unclassifiable GCC directive at %C, ignored");
}
reject_statement ();
gfc_error_recovery ();
return ST_NONE;
}
#undef match
/* Assert next length characters to be equal to token in free form. */
static void
verify_token_free (const char* token, int length, bool last_was_use_stmt)
{
int i;
char c;
c = gfc_next_ascii_char ();
for (i = 0; i < length; i++, c = gfc_next_ascii_char ())
gcc_assert (c == token[i]);
gcc_assert (gfc_is_whitespace(c));
gfc_gobble_whitespace ();
if (last_was_use_stmt)
use_modules ();
}
/* Get the next statement in free form source. */
static gfc_statement
next_free (void)
{
match m;
int i, cnt, at_bol;
char c;
at_bol = gfc_at_bol ();
gfc_gobble_whitespace ();
c = gfc_peek_ascii_char ();
if (ISDIGIT (c))
{
char d;
/* Found a statement label? */
m = gfc_match_st_label (&gfc_statement_label);
d = gfc_peek_ascii_char ();
if (m != MATCH_YES || !gfc_is_whitespace (d))
{
gfc_match_small_literal_int (&i, &cnt);
if (cnt > 5)
gfc_error_now ("Too many digits in statement label at %C");
if (i == 0)
gfc_error_now ("Zero is not a valid statement label at %C");
do
c = gfc_next_ascii_char ();
while (ISDIGIT(c));
if (!gfc_is_whitespace (c))
gfc_error_now ("Non-numeric character in statement label at %C");
return ST_NONE;
}
else
{
label_locus = gfc_current_locus;
gfc_gobble_whitespace ();
if (at_bol && gfc_peek_ascii_char () == ';')
{
gfc_error_now ("Semicolon at %C needs to be preceded by "
"statement");
gfc_next_ascii_char (); /* Eat up the semicolon. */
return ST_NONE;
}
if (gfc_match_eos () == MATCH_YES)
gfc_error_now ("Statement label without statement at %L",
&label_locus);
}
}
else if (c == '!')
{
/* Comments have already been skipped by the time we get here,
except for GCC attributes and OpenMP/OpenACC directives. */
gfc_next_ascii_char (); /* Eat up the exclamation sign. */
c = gfc_peek_ascii_char ();
if (c == 'g')
{
int i;
c = gfc_next_ascii_char ();
for (i = 0; i < 4; i++, c = gfc_next_ascii_char ())
gcc_assert (c == "gcc$"[i]);
gfc_gobble_whitespace ();
return decode_gcc_attribute ();
}
else if (c == '$')
{
/* Since both OpenMP and OpenACC directives starts with
!$ character sequence, we must check all flags combinations */
if ((flag_openmp || flag_openmp_simd)
&& !flag_openacc)
{
verify_token_free ("$omp", 4, last_was_use_stmt);
return decode_omp_directive ();
}
else if ((flag_openmp || flag_openmp_simd)
&& flag_openacc)
{
gfc_next_ascii_char (); /* Eat up dollar character */
c = gfc_peek_ascii_char ();
if (c == 'o')
{
verify_token_free ("omp", 3, last_was_use_stmt);
return decode_omp_directive ();
}
else if (c == 'a')
{
verify_token_free ("acc", 3, last_was_use_stmt);
return decode_oacc_directive ();
}
}
else if (flag_openacc)
{
verify_token_free ("$acc", 4, last_was_use_stmt);
return decode_oacc_directive ();
}
}
gcc_unreachable ();
}
if (at_bol && c == ';')
{
if (!(gfc_option.allow_std & GFC_STD_F2008))
gfc_error_now ("Fortran 2008: Semicolon at %C without preceding "
"statement");
gfc_next_ascii_char (); /* Eat up the semicolon. */
return ST_NONE;
}
return decode_statement ();
}
/* Assert next length characters to be equal to token in fixed form. */
static bool
verify_token_fixed (const char *token, int length, bool last_was_use_stmt)
{
int i;
char c = gfc_next_char_literal (NONSTRING);
for (i = 0; i < length; i++, c = gfc_next_char_literal (NONSTRING))
gcc_assert ((char) gfc_wide_tolower (c) == token[i]);
if (c != ' ' && c != '0')
{
gfc_buffer_error (false);
gfc_error ("Bad continuation line at %C");
return false;
}
if (last_was_use_stmt)
use_modules ();
return true;
}
/* Get the next statement in fixed-form source. */
static gfc_statement
next_fixed (void)
{
int label, digit_flag, i;
locus loc;
gfc_char_t c;
if (!gfc_at_bol ())
return decode_statement ();
/* Skip past the current label field, parsing a statement label if
one is there. This is a weird number parser, since the number is
contained within five columns and can have any kind of embedded
spaces. We also check for characters that make the rest of the
line a comment. */
label = 0;
digit_flag = 0;
for (i = 0; i < 5; i++)
{
c = gfc_next_char_literal (NONSTRING);
switch (c)
{
case ' ':
break;
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
label = label * 10 + ((unsigned char) c - '0');
label_locus = gfc_current_locus;
digit_flag = 1;
break;
/* Comments have already been skipped by the time we get
here, except for GCC attributes and OpenMP directives. */
case '*':
c = gfc_next_char_literal (NONSTRING);
if (TOLOWER (c) == 'g')
{
for (i = 0; i < 4; i++, c = gfc_next_char_literal (NONSTRING))
gcc_assert (TOLOWER (c) == "gcc$"[i]);
return decode_gcc_attribute ();
}
else if (c == '$')
{
if ((flag_openmp || flag_openmp_simd)
&& !flag_openacc)
{
if (!verify_token_fixed ("omp", 3, last_was_use_stmt))
return ST_NONE;
return decode_omp_directive ();
}
else if ((flag_openmp || flag_openmp_simd)
&& flag_openacc)
{
c = gfc_next_char_literal(NONSTRING);
if (c == 'o' || c == 'O')
{
if (!verify_token_fixed ("mp", 2, last_was_use_stmt))
return ST_NONE;
return decode_omp_directive ();
}
else if (c == 'a' || c == 'A')
{
if (!verify_token_fixed ("cc", 2, last_was_use_stmt))
return ST_NONE;
return decode_oacc_directive ();
}
}
else if (flag_openacc)
{
if (!verify_token_fixed ("acc", 3, last_was_use_stmt))
return ST_NONE;
return decode_oacc_directive ();
}
}
gcc_fallthrough ();
/* Comments have already been skipped by the time we get
here so don't bother checking for them. */
default:
gfc_buffer_error (false);
gfc_error ("Non-numeric character in statement label at %C");
return ST_NONE;
}
}
if (digit_flag)
{
if (label == 0)
gfc_warning_now (0, "Zero is not a valid statement label at %C");
else
{
/* We've found a valid statement label. */
gfc_statement_label = gfc_get_st_label (label);
}
}
/* Since this line starts a statement, it cannot be a continuation
of a previous statement. If we see something here besides a
space or zero, it must be a bad continuation line. */
c = gfc_next_char_literal (NONSTRING);
if (c == '\n')
goto blank_line;
if (c != ' ' && c != '0')
{
gfc_buffer_error (false);
gfc_error ("Bad continuation line at %C");
return ST_NONE;
}
/* Now that we've taken care of the statement label columns, we have
to make sure that the first nonblank character is not a '!'. If
it is, the rest of the line is a comment. */
do
{
loc = gfc_current_locus;
c = gfc_next_char_literal (NONSTRING);
}
while (gfc_is_whitespace (c));
if (c == '!')
goto blank_line;
gfc_current_locus = loc;
if (c == ';')
{
if (digit_flag)
gfc_error_now ("Semicolon at %C needs to be preceded by statement");
else if (!(gfc_option.allow_std & GFC_STD_F2008))
gfc_error_now ("Fortran 2008: Semicolon at %C without preceding "
"statement");
return ST_NONE;
}
if (gfc_match_eos () == MATCH_YES)
goto blank_line;
/* At this point, we've got a nonblank statement to parse. */
return decode_statement ();
blank_line:
if (digit_flag)
gfc_error_now ("Statement label without statement at %L", &label_locus);
gfc_current_locus.lb->truncated = 0;
gfc_advance_line ();
return ST_NONE;
}
/* Return the next non-ST_NONE statement to the caller. We also worry
about including files and the ends of include files at this stage. */
static gfc_statement
next_statement (void)
{
gfc_statement st;
locus old_locus;
gfc_enforce_clean_symbol_state ();
gfc_new_block = NULL;
gfc_current_ns->old_equiv = gfc_current_ns->equiv;
gfc_current_ns->old_data = gfc_current_ns->data;
for (;;)
{
gfc_statement_label = NULL;
gfc_buffer_error (true);
if (gfc_at_eol ())
gfc_advance_line ();
gfc_skip_comments ();
if (gfc_at_end ())
{
st = ST_NONE;
break;
}
if (gfc_define_undef_line ())
continue;
old_locus = gfc_current_locus;
st = (gfc_current_form == FORM_FIXED) ? next_fixed () : next_free ();
if (st != ST_NONE)
break;
}
gfc_buffer_error (false);
if (st == ST_GET_FCN_CHARACTERISTICS)
{
if (gfc_statement_label != NULL)
{
gfc_free_st_label (gfc_statement_label);
gfc_statement_label = NULL;
}
gfc_current_locus = old_locus;
}
if (st != ST_NONE)
check_statement_label (st);
return st;
}
/****************************** Parser ***********************************/
/* The parser subroutines are of type 'try' that fail if the file ends
unexpectedly. */
/* Macros that expand to case-labels for various classes of
statements. Start with executable statements that directly do
things. */
#define case_executable case ST_ALLOCATE: case ST_BACKSPACE: case ST_CALL: \
case ST_CLOSE: case ST_CONTINUE: case ST_DEALLOCATE: case ST_END_FILE: \
case ST_GOTO: case ST_INQUIRE: case ST_NULLIFY: case ST_OPEN: \
case ST_READ: case ST_RETURN: case ST_REWIND: case ST_SIMPLE_IF: \
case ST_PAUSE: case ST_STOP: case ST_WAIT: case ST_WRITE: \
case ST_POINTER_ASSIGNMENT: case ST_EXIT: case ST_CYCLE: \
case ST_ASSIGNMENT: case ST_ARITHMETIC_IF: case ST_WHERE: case ST_FORALL: \
case ST_LABEL_ASSIGNMENT: case ST_FLUSH: case ST_OMP_FLUSH: \
case ST_OMP_BARRIER: case ST_OMP_TASKWAIT: case ST_OMP_TASKYIELD: \
case ST_OMP_CANCEL: case ST_OMP_CANCELLATION_POINT: case ST_OMP_DEPOBJ: \
case ST_OMP_TARGET_UPDATE: case ST_OMP_TARGET_ENTER_DATA: \
case ST_OMP_TARGET_EXIT_DATA: case ST_OMP_ORDERED_DEPEND: case ST_OMP_ERROR: \
case ST_ERROR_STOP: case ST_OMP_SCAN: case ST_SYNC_ALL: \
case ST_SYNC_IMAGES: case ST_SYNC_MEMORY: case ST_LOCK: case ST_UNLOCK: \
case ST_FORM_TEAM: case ST_CHANGE_TEAM: \
case ST_END_TEAM: case ST_SYNC_TEAM: \
case ST_EVENT_POST: case ST_EVENT_WAIT: case ST_FAIL_IMAGE: \
case ST_OACC_UPDATE: case ST_OACC_WAIT: case ST_OACC_CACHE: \
case ST_OACC_ENTER_DATA: case ST_OACC_EXIT_DATA
/* Statements that mark other executable statements. */
#define case_exec_markers case ST_DO: case ST_FORALL_BLOCK: \
case ST_IF_BLOCK: case ST_BLOCK: case ST_ASSOCIATE: \
case ST_WHERE_BLOCK: case ST_SELECT_CASE: case ST_SELECT_TYPE: \
case ST_SELECT_RANK: case ST_OMP_PARALLEL: case ST_OMP_PARALLEL_MASKED: \
case ST_OMP_PARALLEL_MASKED_TASKLOOP: \
case ST_OMP_PARALLEL_MASKED_TASKLOOP_SIMD: case ST_OMP_PARALLEL_MASTER: \
case ST_OMP_PARALLEL_MASTER_TASKLOOP: \
case ST_OMP_PARALLEL_MASTER_TASKLOOP_SIMD: \
case ST_OMP_PARALLEL_SECTIONS: case ST_OMP_SECTIONS: case ST_OMP_ORDERED: \
case ST_OMP_CRITICAL: case ST_OMP_MASKED: case ST_OMP_MASKED_TASKLOOP: \
case ST_OMP_MASKED_TASKLOOP_SIMD: \
case ST_OMP_MASTER: case ST_OMP_MASTER_TASKLOOP: \
case ST_OMP_MASTER_TASKLOOP_SIMD: case ST_OMP_SCOPE: case ST_OMP_SINGLE: \
case ST_OMP_DO: case ST_OMP_PARALLEL_DO: case ST_OMP_ATOMIC: \
case ST_OMP_WORKSHARE: case ST_OMP_PARALLEL_WORKSHARE: \
case ST_OMP_TASK: case ST_OMP_TASKGROUP: case ST_OMP_SIMD: \
case ST_OMP_DO_SIMD: case ST_OMP_PARALLEL_DO_SIMD: case ST_OMP_TARGET: \
case ST_OMP_TARGET_DATA: case ST_OMP_TARGET_TEAMS: \
case ST_OMP_TARGET_TEAMS_DISTRIBUTE: \
case ST_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD: \
case ST_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO: \
case ST_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD: \
case ST_OMP_TEAMS: case ST_OMP_TEAMS_DISTRIBUTE: \
case ST_OMP_TEAMS_DISTRIBUTE_SIMD: \
case ST_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO: \
case ST_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD: case ST_OMP_DISTRIBUTE: \
case ST_OMP_DISTRIBUTE_SIMD: case ST_OMP_DISTRIBUTE_PARALLEL_DO: \
case ST_OMP_DISTRIBUTE_PARALLEL_DO_SIMD: case ST_OMP_TARGET_PARALLEL: \
case ST_OMP_TARGET_PARALLEL_DO: case ST_OMP_TARGET_PARALLEL_DO_SIMD: \
case ST_OMP_TARGET_SIMD: case ST_OMP_TASKLOOP: case ST_OMP_TASKLOOP_SIMD: \
case ST_OMP_LOOP: case ST_OMP_PARALLEL_LOOP: case ST_OMP_TEAMS_LOOP: \
case ST_OMP_TARGET_PARALLEL_LOOP: case ST_OMP_TARGET_TEAMS_LOOP: \
case ST_CRITICAL: \
case ST_OACC_PARALLEL_LOOP: case ST_OACC_PARALLEL: case ST_OACC_KERNELS: \
case ST_OACC_DATA: case ST_OACC_HOST_DATA: case ST_OACC_LOOP: \
case ST_OACC_KERNELS_LOOP: case ST_OACC_SERIAL_LOOP: case ST_OACC_SERIAL: \
case ST_OACC_ATOMIC
/* Declaration statements */
#define case_decl case ST_ATTR_DECL: case ST_COMMON: case ST_DATA_DECL: \
case ST_EQUIVALENCE: case ST_NAMELIST: case ST_STATEMENT_FUNCTION: \
case ST_TYPE: case ST_INTERFACE: case ST_PROCEDURE
/* OpenMP and OpenACC declaration statements, which may appear anywhere in
the specification part. */
#define case_omp_decl case ST_OMP_THREADPRIVATE: case ST_OMP_DECLARE_SIMD: \
case ST_OMP_DECLARE_TARGET: case ST_OMP_DECLARE_REDUCTION: \
case ST_OMP_DECLARE_VARIANT: \
case ST_OMP_REQUIRES: case ST_OACC_ROUTINE: case ST_OACC_DECLARE
/* Block end statements. Errors associated with interchanging these
are detected in gfc_match_end(). */
#define case_end case ST_END_BLOCK_DATA: case ST_END_FUNCTION: \
case ST_END_PROGRAM: case ST_END_SUBROUTINE: \
case ST_END_BLOCK: case ST_END_ASSOCIATE
/* Push a new state onto the stack. */
static void
push_state (gfc_state_data *p, gfc_compile_state new_state, gfc_symbol *sym)
{
p->state = new_state;
p->previous = gfc_state_stack;
p->sym = sym;
p->head = p->tail = NULL;
p->do_variable = NULL;
if (p->state != COMP_DO && p->state != COMP_DO_CONCURRENT)
p->ext.oacc_declare_clauses = NULL;
/* If this the state of a construct like BLOCK, DO or IF, the corresponding
construct statement was accepted right before pushing the state. Thus,
the construct's gfc_code is available as tail of the parent state. */
gcc_assert (gfc_state_stack);
p->construct = gfc_state_stack->tail;
gfc_state_stack = p;
}
/* Pop the current state. */
static void
pop_state (void)
{
gfc_state_stack = gfc_state_stack->previous;
}
/* Try to find the given state in the state stack. */
bool
gfc_find_state (gfc_compile_state state)
{
gfc_state_data *p;
for (p = gfc_state_stack; p; p = p->previous)
if (p->state == state)
break;
return (p == NULL) ? false : true;
}
/* Starts a new level in the statement list. */
static gfc_code *
new_level (gfc_code *q)
{
gfc_code *p;
p = q->block = gfc_get_code (EXEC_NOP);
gfc_state_stack->head = gfc_state_stack->tail = p;
return p;
}
/* Add the current new_st code structure and adds it to the current
program unit. As a side-effect, it zeroes the new_st. */
static gfc_code *
add_statement (void)
{
gfc_code *p;
p = XCNEW (gfc_code);
*p = new_st;
p->loc = gfc_current_locus;
if (gfc_state_stack->head == NULL)
gfc_state_stack->head = p;
else
gfc_state_stack->tail->next = p;
while (p->next != NULL)
p = p->next;
gfc_state_stack->tail = p;
gfc_clear_new_st ();
return p;
}
/* Frees everything associated with the current statement. */
static void
undo_new_statement (void)
{
gfc_free_statements (new_st.block);
gfc_free_statements (new_st.next);
gfc_free_statement (&new_st);
gfc_clear_new_st ();
}
/* If the current statement has a statement label, make sure that it
is allowed to, or should have one. */
static void
check_statement_label (gfc_statement st)
{
gfc_sl_type type;
if (gfc_statement_label == NULL)
{
if (st == ST_FORMAT)
gfc_error ("FORMAT statement at %L does not have a statement label",
&new_st.loc);
return;
}
switch (st)
{
case ST_END_PROGRAM:
case ST_END_FUNCTION:
case ST_END_SUBROUTINE:
case ST_ENDDO:
case ST_ENDIF:
case ST_END_SELECT:
case ST_END_CRITICAL:
case ST_END_BLOCK:
case ST_END_ASSOCIATE:
case_executable:
case_exec_markers:
if (st == ST_ENDDO || st == ST_CONTINUE)
type = ST_LABEL_DO_TARGET;
else
type = ST_LABEL_TARGET;
break;
case ST_FORMAT:
type = ST_LABEL_FORMAT;
break;
/* Statement labels are not restricted from appearing on a
particular line. However, there are plenty of situations
where the resulting label can't be referenced. */
default:
type = ST_LABEL_BAD_TARGET;
break;
}
gfc_define_st_label (gfc_statement_label, type, &label_locus);
new_st.here = gfc_statement_label;
}
/* Figures out what the enclosing program unit is. This will be a
function, subroutine, program, block data or module. */
gfc_state_data *
gfc_enclosing_unit (gfc_compile_state * result)
{
gfc_state_data *p;
for (p = gfc_state_stack; p; p = p->previous)
if (p->state == COMP_FUNCTION || p->state == COMP_SUBROUTINE
|| p->state == COMP_MODULE || p->state == COMP_SUBMODULE
|| p->state == COMP_BLOCK_DATA || p->state == COMP_PROGRAM)
{
if (result != NULL)
*result = p->state;
return p;
}
if (result != NULL)
*result = COMP_PROGRAM;
return NULL;
}
/* Translate a statement enum to a string. */
const char *
gfc_ascii_statement (gfc_statement st)
{
const char *p;
switch (st)
{
case ST_ARITHMETIC_IF:
p = _("arithmetic IF");
break;
case ST_ALLOCATE:
p = "ALLOCATE";
break;
case ST_ASSOCIATE:
p = "ASSOCIATE";
break;
case ST_ATTR_DECL:
p = _("attribute declaration");
break;
case ST_BACKSPACE:
p = "BACKSPACE";
break;
case ST_BLOCK:
p = "BLOCK";
break;
case ST_BLOCK_DATA:
p = "BLOCK DATA";
break;
case ST_CALL:
p = "CALL";
break;
case ST_CASE:
p = "CASE";
break;
case ST_CLOSE:
p = "CLOSE";
break;
case ST_COMMON:
p = "COMMON";
break;
case ST_CONTINUE:
p = "CONTINUE";
break;
case ST_CONTAINS:
p = "CONTAINS";
break;
case ST_CRITICAL:
p = "CRITICAL";
break;
case ST_CYCLE:
p = "CYCLE";
break;
case ST_DATA_DECL:
p = _("data declaration");
break;
case ST_DATA:
p = "DATA";
break;
case ST_DEALLOCATE:
p = "DEALLOCATE";
break;
case ST_MAP:
p = "MAP";
break;
case ST_UNION:
p = "UNION";
break;
case ST_STRUCTURE_DECL:
p = "STRUCTURE";
break;
case ST_DERIVED_DECL:
p = _("derived type declaration");
break;
case ST_DO:
p = "DO";
break;
case ST_ELSE:
p = "ELSE";
break;
case ST_ELSEIF:
p = "ELSE IF";
break;
case ST_ELSEWHERE:
p = "ELSEWHERE";
break;
case ST_EVENT_POST:
p = "EVENT POST";
break;
case ST_EVENT_WAIT:
p = "EVENT WAIT";
break;
case ST_FAIL_IMAGE:
p = "FAIL IMAGE";
break;
case ST_CHANGE_TEAM:
p = "CHANGE TEAM";
break;
case ST_END_TEAM:
p = "END TEAM";
break;
case ST_FORM_TEAM:
p = "FORM TEAM";
break;
case ST_SYNC_TEAM:
p = "SYNC TEAM";
break;
case ST_END_ASSOCIATE:
p = "END ASSOCIATE";
break;
case ST_END_BLOCK:
p = "END BLOCK";
break;
case ST_END_BLOCK_DATA:
p = "END BLOCK DATA";
break;
case ST_END_CRITICAL:
p = "END CRITICAL";
break;
case ST_ENDDO:
p = "END DO";
break;
case ST_END_FILE:
p = "END FILE";
break;
case ST_END_FORALL:
p = "END FORALL";
break;
case ST_END_FUNCTION:
p = "END FUNCTION";
break;
case ST_ENDIF:
p = "END IF";
break;
case ST_END_INTERFACE:
p = "END INTERFACE";
break;
case ST_END_MODULE:
p = "END MODULE";
break;
case ST_END_SUBMODULE:
p = "END SUBMODULE";
break;
case ST_END_PROGRAM:
p = "END PROGRAM";
break;
case ST_END_SELECT:
p = "END SELECT";
break;
case ST_END_SUBROUTINE:
p = "END SUBROUTINE";
break;
case ST_END_WHERE:
p = "END WHERE";
break;
case ST_END_STRUCTURE:
p = "END STRUCTURE";
break;
case ST_END_UNION:
p = "END UNION";
break;
case ST_END_MAP:
p = "END MAP";
break;
case ST_END_TYPE:
p = "END TYPE";
break;
case ST_ENTRY:
p = "ENTRY";
break;
case ST_EQUIVALENCE:
p = "EQUIVALENCE";
break;
case ST_ERROR_STOP:
p = "ERROR STOP";
break;
case ST_EXIT:
p = "EXIT";
break;
case ST_FLUSH:
p = "FLUSH";
break;
case ST_FORALL_BLOCK: /* Fall through */
case ST_FORALL:
p = "FORALL";
break;
case ST_FORMAT:
p = "FORMAT";
break;
case ST_FUNCTION:
p = "FUNCTION";
break;
case ST_GENERIC:
p = "GENERIC";
break;
case ST_GOTO:
p = "GOTO";
break;
case ST_IF_BLOCK:
p = _("block IF");
break;
case ST_IMPLICIT:
p = "IMPLICIT";
break;
case ST_IMPLICIT_NONE:
p = "IMPLICIT NONE";
break;
case ST_IMPLIED_ENDDO:
p = _("implied END DO");
break;
case ST_IMPORT:
p = "IMPORT";
break;
case ST_INQUIRE:
p = "INQUIRE";
break;
case ST_INTERFACE:
p = "INTERFACE";
break;
case ST_LOCK:
p = "LOCK";
break;
case ST_PARAMETER:
p = "PARAMETER";
break;
case ST_PRIVATE:
p = "PRIVATE";
break;
case ST_PUBLIC:
p = "PUBLIC";
break;
case ST_MODULE:
p = "MODULE";
break;
case ST_SUBMODULE:
p = "SUBMODULE";
break;
case ST_PAUSE:
p = "PAUSE";
break;
case ST_MODULE_PROC:
p = "MODULE PROCEDURE";
break;
case ST_NAMELIST:
p = "NAMELIST";
break;
case ST_NULLIFY:
p = "NULLIFY";
break;
case ST_OPEN:
p = "OPEN";
break;
case ST_PROGRAM:
p = "PROGRAM";
break;
case ST_PROCEDURE:
p = "PROCEDURE";
break;
case ST_READ:
p = "READ";
break;
case ST_RETURN:
p = "RETURN";
break;
case ST_REWIND:
p = "REWIND";
break;
case ST_STOP:
p = "STOP";
break;
case ST_SYNC_ALL:
p = "SYNC ALL";
break;
case ST_SYNC_IMAGES:
p = "SYNC IMAGES";
break;
case ST_SYNC_MEMORY:
p = "SYNC MEMORY";
break;
case ST_SUBROUTINE:
p = "SUBROUTINE";
break;
case ST_TYPE:
p = "TYPE";
break;
case ST_UNLOCK:
p = "UNLOCK";
break;
case ST_USE:
p = "USE";
break;
case ST_WHERE_BLOCK: /* Fall through */
case ST_WHERE:
p = "WHERE";
break;
case ST_WAIT:
p = "WAIT";
break;
case ST_WRITE:
p = "WRITE";
break;
case ST_ASSIGNMENT:
p = _("assignment");
break;
case ST_POINTER_ASSIGNMENT:
p = _("pointer assignment");
break;
case ST_SELECT_CASE:
p = "SELECT CASE";
break;
case ST_SELECT_TYPE:
p = "SELECT TYPE";
break;
case ST_SELECT_RANK:
p = "SELECT RANK";
break;
case ST_TYPE_IS:
p = "TYPE IS";
break;
case ST_CLASS_IS:
p = "CLASS IS";
break;
case ST_RANK:
p = "RANK";
break;
case ST_SEQUENCE:
p = "SEQUENCE";
break;
case ST_SIMPLE_IF:
p = _("simple IF");
break;
case ST_STATEMENT_FUNCTION:
p = "STATEMENT FUNCTION";
break;
case ST_LABEL_ASSIGNMENT:
p = "LABEL ASSIGNMENT";
break;
case ST_ENUM:
p = "ENUM DEFINITION";
break;
case ST_ENUMERATOR:
p = "ENUMERATOR DEFINITION";
break;
case ST_END_ENUM:
p = "END ENUM";
break;
case ST_OACC_PARALLEL_LOOP:
p = "!$ACC PARALLEL LOOP";
break;
case ST_OACC_END_PARALLEL_LOOP:
p = "!$ACC END PARALLEL LOOP";
break;
case ST_OACC_PARALLEL:
p = "!$ACC PARALLEL";
break;
case ST_OACC_END_PARALLEL:
p = "!$ACC END PARALLEL";
break;
case ST_OACC_KERNELS:
p = "!$ACC KERNELS";
break;
case ST_OACC_END_KERNELS:
p = "!$ACC END KERNELS";
break;
case ST_OACC_KERNELS_LOOP:
p = "!$ACC KERNELS LOOP";
break;
case ST_OACC_END_KERNELS_LOOP:
p = "!$ACC END KERNELS LOOP";
break;
case ST_OACC_SERIAL_LOOP:
p = "!$ACC SERIAL LOOP";
break;
case ST_OACC_END_SERIAL_LOOP:
p = "!$ACC END SERIAL LOOP";
break;
case ST_OACC_SERIAL:
p = "!$ACC SERIAL";
break;
case ST_OACC_END_SERIAL:
p = "!$ACC END SERIAL";
break;
case ST_OACC_DATA:
p = "!$ACC DATA";
break;
case ST_OACC_END_DATA:
p = "!$ACC END DATA";
break;
case ST_OACC_HOST_DATA:
p = "!$ACC HOST_DATA";
break;
case ST_OACC_END_HOST_DATA:
p = "!$ACC END HOST_DATA";
break;
case ST_OACC_LOOP:
p = "!$ACC LOOP";
break;
case ST_OACC_END_LOOP:
p = "!$ACC END LOOP";
break;
case ST_OACC_DECLARE:
p = "!$ACC DECLARE";
break;
case ST_OACC_UPDATE:
p = "!$ACC UPDATE";
break;
case ST_OACC_WAIT:
p = "!$ACC WAIT";
break;
case ST_OACC_CACHE:
p = "!$ACC CACHE";
break;
case ST_OACC_ENTER_DATA:
p = "!$ACC ENTER DATA";
break;
case ST_OACC_EXIT_DATA:
p = "!$ACC EXIT DATA";
break;
case ST_OACC_ROUTINE:
p = "!$ACC ROUTINE";
break;
case ST_OACC_ATOMIC:
p = "!$ACC ATOMIC";
break;
case ST_OACC_END_ATOMIC:
p = "!$ACC END ATOMIC";
break;
case ST_OMP_ATOMIC:
p = "!$OMP ATOMIC";
break;
case ST_OMP_BARRIER:
p = "!$OMP BARRIER";
break;
case ST_OMP_CANCEL:
p = "!$OMP CANCEL";
break;
case ST_OMP_CANCELLATION_POINT:
p = "!$OMP CANCELLATION POINT";
break;
case ST_OMP_CRITICAL:
p = "!$OMP CRITICAL";
break;
case ST_OMP_DECLARE_REDUCTION:
p = "!$OMP DECLARE REDUCTION";
break;
case ST_OMP_DECLARE_SIMD:
p = "!$OMP DECLARE SIMD";
break;
case ST_OMP_DECLARE_TARGET:
p = "!$OMP DECLARE TARGET";
break;
case ST_OMP_DECLARE_VARIANT:
p = "!$OMP DECLARE VARIANT";
break;
case ST_OMP_DEPOBJ:
p = "!$OMP DEPOBJ";
break;
case ST_OMP_DISTRIBUTE:
p = "!$OMP DISTRIBUTE";
break;
case ST_OMP_DISTRIBUTE_PARALLEL_DO:
p = "!$OMP DISTRIBUTE PARALLEL DO";
break;
case ST_OMP_DISTRIBUTE_PARALLEL_DO_SIMD:
p = "!$OMP DISTRIBUTE PARALLEL DO SIMD";
break;
case ST_OMP_DISTRIBUTE_SIMD:
p = "!$OMP DISTRIBUTE SIMD";
break;
case ST_OMP_DO:
p = "!$OMP DO";
break;
case ST_OMP_DO_SIMD:
p = "!$OMP DO SIMD";
break;
case ST_OMP_END_ATOMIC:
p = "!$OMP END ATOMIC";
break;
case ST_OMP_END_CRITICAL:
p = "!$OMP END CRITICAL";
break;
case ST_OMP_END_DISTRIBUTE:
p = "!$OMP END DISTRIBUTE";
break;
case ST_OMP_END_DISTRIBUTE_PARALLEL_DO:
p = "!$OMP END DISTRIBUTE PARALLEL DO";
break;
case ST_OMP_END_DISTRIBUTE_PARALLEL_DO_SIMD:
p = "!$OMP END DISTRIBUTE PARALLEL DO SIMD";
break;
case ST_OMP_END_DISTRIBUTE_SIMD:
p = "!$OMP END DISTRIBUTE SIMD";
break;
case ST_OMP_END_DO:
p = "!$OMP END DO";
break;
case ST_OMP_END_DO_SIMD:
p = "!$OMP END DO SIMD";
break;
case ST_OMP_END_SCOPE:
p = "!$OMP END SCOPE";
break;
case ST_OMP_END_SIMD:
p = "!$OMP END SIMD";
break;
case ST_OMP_END_LOOP:
p = "!$OMP END LOOP";
break;
case ST_OMP_END_MASKED:
p = "!$OMP END MASKED";
break;
case ST_OMP_END_MASKED_TASKLOOP:
p = "!$OMP END MASKED TASKLOOP";
break;
case ST_OMP_END_MASKED_TASKLOOP_SIMD:
p = "!$OMP END MASKED TASKLOOP SIMD";
break;
case ST_OMP_END_MASTER:
p = "!$OMP END MASTER";
break;
case ST_OMP_END_MASTER_TASKLOOP:
p = "!$OMP END MASTER TASKLOOP";
break;
case ST_OMP_END_MASTER_TASKLOOP_SIMD:
p = "!$OMP END MASTER TASKLOOP SIMD";
break;
case ST_OMP_END_ORDERED:
p = "!$OMP END ORDERED";
break;
case ST_OMP_END_PARALLEL:
p = "!$OMP END PARALLEL";
break;
case ST_OMP_END_PARALLEL_DO:
p = "!$OMP END PARALLEL DO";
break;
case ST_OMP_END_PARALLEL_DO_SIMD:
p = "!$OMP END PARALLEL DO SIMD";
break;
case ST_OMP_END_PARALLEL_LOOP:
p = "!$OMP END PARALLEL LOOP";
break;
case ST_OMP_END_PARALLEL_MASKED:
p = "!$OMP END PARALLEL MASKED";
break;
case ST_OMP_END_PARALLEL_MASKED_TASKLOOP:
p = "!$OMP END PARALLEL MASKED TASKLOOP";
break;
case ST_OMP_END_PARALLEL_MASKED_TASKLOOP_SIMD:
p = "!$OMP END PARALLEL MASKED TASKLOOP SIMD";
break;
case ST_OMP_END_PARALLEL_MASTER:
p = "!$OMP END PARALLEL MASTER";
break;
case ST_OMP_END_PARALLEL_MASTER_TASKLOOP:
p = "!$OMP END PARALLEL MASTER TASKLOOP";
break;
case ST_OMP_END_PARALLEL_MASTER_TASKLOOP_SIMD:
p = "!$OMP END PARALLEL MASTER TASKLOOP SIMD";
break;
case ST_OMP_END_PARALLEL_SECTIONS:
p = "!$OMP END PARALLEL SECTIONS";
break;
case ST_OMP_END_PARALLEL_WORKSHARE:
p = "!$OMP END PARALLEL WORKSHARE";
break;
case ST_OMP_END_SECTIONS:
p = "!$OMP END SECTIONS";
break;
case ST_OMP_END_SINGLE:
p = "!$OMP END SINGLE";
break;
case ST_OMP_END_TASK:
p = "!$OMP END TASK";
break;
case ST_OMP_END_TARGET:
p = "!$OMP END TARGET";
break;
case ST_OMP_END_TARGET_DATA:
p = "!$OMP END TARGET DATA";
break;
case ST_OMP_END_TARGET_PARALLEL:
p = "!$OMP END TARGET PARALLEL";
break;
case ST_OMP_END_TARGET_PARALLEL_DO:
p = "!$OMP END TARGET PARALLEL DO";
break;
case ST_OMP_END_TARGET_PARALLEL_DO_SIMD:
p = "!$OMP END TARGET PARALLEL DO SIMD";
break;
case ST_OMP_END_TARGET_PARALLEL_LOOP:
p = "!$OMP END TARGET PARALLEL LOOP";
break;
case ST_OMP_END_TARGET_SIMD:
p = "!$OMP END TARGET SIMD";
break;
case ST_OMP_END_TARGET_TEAMS:
p = "!$OMP END TARGET TEAMS";
break;
case ST_OMP_END_TARGET_TEAMS_DISTRIBUTE:
p = "!$OMP END TARGET TEAMS DISTRIBUTE";
break;
case ST_OMP_END_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO:
p = "!$OMP END TARGET TEAMS DISTRIBUTE PARALLEL DO";
break;
case ST_OMP_END_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD:
p = "!$OMP END TARGET TEAMS DISTRIBUTE PARALLEL DO SIMD";
break;
case ST_OMP_END_TARGET_TEAMS_DISTRIBUTE_SIMD:
p = "!$OMP END TARGET TEAMS DISTRIBUTE SIMD";
break;
case ST_OMP_END_TARGET_TEAMS_LOOP:
p = "!$OMP END TARGET TEAMS LOOP";
break;
case ST_OMP_END_TASKGROUP:
p = "!$OMP END TASKGROUP";
break;
case ST_OMP_END_TASKLOOP:
p = "!$OMP END TASKLOOP";
break;
case ST_OMP_END_TASKLOOP_SIMD:
p = "!$OMP END TASKLOOP SIMD";
break;
case ST_OMP_END_TEAMS:
p = "!$OMP END TEAMS";
break;
case ST_OMP_END_TEAMS_DISTRIBUTE:
p = "!$OMP END TEAMS DISTRIBUTE";
break;
case ST_OMP_END_TEAMS_DISTRIBUTE_PARALLEL_DO:
p = "!$OMP END TEAMS DISTRIBUTE PARALLEL DO";
break;
case ST_OMP_END_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD:
p = "!$OMP END TEAMS DISTRIBUTE PARALLEL DO SIMD";
break;
case ST_OMP_END_TEAMS_DISTRIBUTE_SIMD:
p = "!$OMP END TEAMS DISTRIBUTE SIMD";
break;
case ST_OMP_END_TEAMS_LOOP:
p = "!$OMP END TEAMS LOOP";
break;
case ST_OMP_END_WORKSHARE:
p = "!$OMP END WORKSHARE";
break;
case ST_OMP_ERROR:
p = "!$OMP ERROR";
break;
case ST_OMP_FLUSH:
p = "!$OMP FLUSH";
break;
case ST_OMP_LOOP:
p = "!$OMP LOOP";
break;
case ST_OMP_MASKED:
p = "!$OMP MASKED";
break;
case ST_OMP_MASKED_TASKLOOP:
p = "!$OMP MASKED TASKLOOP";
break;
case ST_OMP_MASKED_TASKLOOP_SIMD:
p = "!$OMP MASKED TASKLOOP SIMD";
break;
case ST_OMP_MASTER:
p = "!$OMP MASTER";
break;
case ST_OMP_MASTER_TASKLOOP:
p = "!$OMP MASTER TASKLOOP";
break;
case ST_OMP_MASTER_TASKLOOP_SIMD:
p = "!$OMP MASTER TASKLOOP SIMD";
break;
case ST_OMP_ORDERED:
case ST_OMP_ORDERED_DEPEND:
p = "!$OMP ORDERED";
break;
case ST_OMP_PARALLEL:
p = "!$OMP PARALLEL";
break;
case ST_OMP_PARALLEL_DO:
p = "!$OMP PARALLEL DO";
break;
case ST_OMP_PARALLEL_LOOP:
p = "!$OMP PARALLEL LOOP";
break;
case ST_OMP_PARALLEL_DO_SIMD:
p = "!$OMP PARALLEL DO SIMD";
break;
case ST_OMP_PARALLEL_MASKED:
p = "!$OMP PARALLEL MASKED";
break;
case ST_OMP_PARALLEL_MASKED_TASKLOOP:
p = "!$OMP PARALLEL MASKED TASKLOOP";
break;
case ST_OMP_PARALLEL_MASKED_TASKLOOP_SIMD:
p = "!$OMP PARALLEL MASKED TASKLOOP SIMD";
break;
case ST_OMP_PARALLEL_MASTER:
p = "!$OMP PARALLEL MASTER";
break;
case ST_OMP_PARALLEL_MASTER_TASKLOOP:
p = "!$OMP PARALLEL MASTER TASKLOOP";
break;
case ST_OMP_PARALLEL_MASTER_TASKLOOP_SIMD:
p = "!$OMP PARALLEL MASTER TASKLOOP SIMD";
break;
case ST_OMP_PARALLEL_SECTIONS:
p = "!$OMP PARALLEL SECTIONS";
break;
case ST_OMP_PARALLEL_WORKSHARE:
p = "!$OMP PARALLEL WORKSHARE";
break;
case ST_OMP_REQUIRES:
p = "!$OMP REQUIRES";
break;
case ST_OMP_SCAN:
p = "!$OMP SCAN";
break;
case ST_OMP_SCOPE:
p = "!$OMP SCOPE";
break;
case ST_OMP_SECTIONS:
p = "!$OMP SECTIONS";
break;
case ST_OMP_SECTION:
p = "!$OMP SECTION";
break;
case ST_OMP_SIMD:
p = "!$OMP SIMD";
break;
case ST_OMP_SINGLE:
p = "!$OMP SINGLE";
break;
case ST_OMP_TARGET:
p = "!$OMP TARGET";
break;
case ST_OMP_TARGET_DATA:
p = "!$OMP TARGET DATA";
break;
case ST_OMP_TARGET_ENTER_DATA:
p = "!$OMP TARGET ENTER DATA";
break;
case ST_OMP_TARGET_EXIT_DATA:
p = "!$OMP TARGET EXIT DATA";
break;
case ST_OMP_TARGET_PARALLEL:
p = "!$OMP TARGET PARALLEL";
break;
case ST_OMP_TARGET_PARALLEL_DO:
p = "!$OMP TARGET PARALLEL DO";
break;
case ST_OMP_TARGET_PARALLEL_DO_SIMD:
p = "!$OMP TARGET PARALLEL DO SIMD";
break;
case ST_OMP_TARGET_PARALLEL_LOOP:
p = "!$OMP TARGET PARALLEL LOOP";
break;
case ST_OMP_TARGET_SIMD:
p = "!$OMP TARGET SIMD";
break;
case ST_OMP_TARGET_TEAMS:
p = "!$OMP TARGET TEAMS";
break;
case ST_OMP_TARGET_TEAMS_DISTRIBUTE:
p = "!$OMP TARGET TEAMS DISTRIBUTE";
break;
case ST_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO:
p = "!$OMP TARGET TEAMS DISTRIBUTE PARALLEL DO";
break;
case ST_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD:
p = "!$OMP TARGET TEAMS DISTRIBUTE PARALLEL DO SIMD";
break;
case ST_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD:
p = "!$OMP TARGET TEAMS DISTRIBUTE SIMD";
break;
case ST_OMP_TARGET_TEAMS_LOOP:
p = "!$OMP TARGET TEAMS LOOP";
break;
case ST_OMP_TARGET_UPDATE:
p = "!$OMP TARGET UPDATE";
break;
case ST_OMP_TASK:
p = "!$OMP TASK";
break;
case ST_OMP_TASKGROUP:
p = "!$OMP TASKGROUP";
break;
case ST_OMP_TASKLOOP:
p = "!$OMP TASKLOOP";
break;
case ST_OMP_TASKLOOP_SIMD:
p = "!$OMP TASKLOOP SIMD";
break;
case ST_OMP_TASKWAIT:
p = "!$OMP TASKWAIT";
break;
case ST_OMP_TASKYIELD:
p = "!$OMP TASKYIELD";
break;
case ST_OMP_TEAMS:
p = "!$OMP TEAMS";
break;
case ST_OMP_TEAMS_DISTRIBUTE:
p = "!$OMP TEAMS DISTRIBUTE";
break;
case ST_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO:
p = "!$OMP TEAMS DISTRIBUTE PARALLEL DO";
break;
case ST_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD:
p = "!$OMP TEAMS DISTRIBUTE PARALLEL DO SIMD";
break;
case ST_OMP_TEAMS_DISTRIBUTE_SIMD:
p = "!$OMP TEAMS DISTRIBUTE SIMD";
break;
case ST_OMP_TEAMS_LOOP:
p = "!$OMP TEAMS LOOP";
break;
case ST_OMP_THREADPRIVATE:
p = "!$OMP THREADPRIVATE";
break;
case ST_OMP_WORKSHARE:
p = "!$OMP WORKSHARE";
break;
default:
gfc_internal_error ("gfc_ascii_statement(): Bad statement code");
}
return p;
}
/* Create a symbol for the main program and assign it to ns->proc_name. */
static void
main_program_symbol (gfc_namespace *ns, const char *name)
{
gfc_symbol *main_program;
symbol_attribute attr;
gfc_get_symbol (name, ns, &main_program);
gfc_clear_attr (&attr);
attr.flavor = FL_PROGRAM;
attr.proc = PROC_UNKNOWN;
attr.subroutine = 1;
attr.access = ACCESS_PUBLIC;
attr.is_main_program = 1;
main_program->attr = attr;
main_program->declared_at = gfc_current_locus;
ns->proc_name = main_program;
gfc_commit_symbols ();
}
/* Do whatever is necessary to accept the last statement. */
static void
accept_statement (gfc_statement st)
{
switch (st)
{
case ST_IMPLICIT_NONE:
case ST_IMPLICIT:
break;
case ST_FUNCTION:
case ST_SUBROUTINE:
case ST_MODULE:
case ST_SUBMODULE:
gfc_current_ns->proc_name = gfc_new_block;
break;
/* If the statement is the end of a block, lay down a special code
that allows a branch to the end of the block from within the
construct. IF and SELECT are treated differently from DO
(where EXEC_NOP is added inside the loop) for two
reasons:
1. END DO has a meaning in the sense that after a GOTO to
it, the loop counter must be increased.
2. IF blocks and SELECT blocks can consist of multiple
parallel blocks (IF ... ELSE IF ... ELSE ... END IF).
Putting the label before the END IF would make the jump
from, say, the ELSE IF block to the END IF illegal. */
case ST_ENDIF:
case ST_END_SELECT:
case ST_END_CRITICAL:
if (gfc_statement_label != NULL)
{
new_st.op = EXEC_END_NESTED_BLOCK;
add_statement ();
}
break;
/* In the case of BLOCK and ASSOCIATE blocks, there cannot be more than
one parallel block. Thus, we add the special code to the nested block
itself, instead of the parent one. */
case ST_END_BLOCK:
case ST_END_ASSOCIATE:
if (gfc_statement_label != NULL)
{
new_st.op = EXEC_END_BLOCK;
add_statement ();
}
break;
/* The end-of-program unit statements do not get the special
marker and require a statement of some sort if they are a
branch target. */
case ST_END_PROGRAM:
case ST_END_FUNCTION:
case ST_END_SUBROUTINE:
if (gfc_statement_label != NULL)
{
new_st.op = EXEC_RETURN;
add_statement ();
}
else
{
new_st.op = EXEC_END_PROCEDURE;
add_statement ();
}
break;
case ST_ENTRY:
case_executable:
case_exec_markers:
add_statement ();
break;
default:
break;
}
gfc_commit_symbols ();
gfc_warning_check ();
gfc_clear_new_st ();
}
/* Undo anything tentative that has been built for the current statement,
except if a gfc_charlen structure has been added to current namespace's
list of gfc_charlen structure. */
static void
reject_statement (void)
{
gfc_free_equiv_until (gfc_current_ns->equiv, gfc_current_ns->old_equiv);
gfc_current_ns->equiv = gfc_current_ns->old_equiv;
gfc_reject_data (gfc_current_ns);
gfc_new_block = NULL;
gfc_undo_symbols ();
gfc_clear_warning ();
undo_new_statement ();
}
/* Generic complaint about an out of order statement. We also do
whatever is necessary to clean up. */
static void
unexpected_statement (gfc_statement st)
{
gfc_error ("Unexpected %s statement at %C", gfc_ascii_statement (st));
reject_statement ();
}
/* Given the next statement seen by the matcher, make sure that it is
in proper order with the last. This subroutine is initialized by
calling it with an argument of ST_NONE. If there is a problem, we
issue an error and return false. Otherwise we return true.
Individual parsers need to verify that the statements seen are
valid before calling here, i.e., ENTRY statements are not allowed in
INTERFACE blocks. The following diagram is taken from the standard:
+---------------------------------------+
| program subroutine function module |
+---------------------------------------+
| use |
+---------------------------------------+
| import |
+---------------------------------------+
| | implicit none |
| +-----------+------------------+
| | parameter | implicit |
| +-----------+------------------+
| format | | derived type |
| entry | parameter | interface |
| | data | specification |
| | | statement func |
| +-----------+------------------+
| | data | executable |
+--------+-----------+------------------+
| contains |
+---------------------------------------+
| internal module/subprogram |
+---------------------------------------+
| end |
+---------------------------------------+
*/
enum state_order
{
ORDER_START,
ORDER_USE,
ORDER_IMPORT,
ORDER_IMPLICIT_NONE,
ORDER_IMPLICIT,
ORDER_SPEC,
ORDER_EXEC
};
typedef struct
{
enum state_order state;
gfc_statement last_statement;
locus where;
}
st_state;
static bool
verify_st_order (st_state *p, gfc_statement st, bool silent)
{
switch (st)
{
case ST_NONE:
p->state = ORDER_START;
break;
case ST_USE:
if (p->state > ORDER_USE)
goto order;
p->state = ORDER_USE;
break;
case ST_IMPORT:
if (p->state > ORDER_IMPORT)
goto order;
p->state = ORDER_IMPORT;
break;
case ST_IMPLICIT_NONE:
if (p->state > ORDER_IMPLICIT)
goto order;
/* The '>' sign cannot be a '>=', because a FORMAT or ENTRY
statement disqualifies a USE but not an IMPLICIT NONE.
Duplicate IMPLICIT NONEs are caught when the implicit types
are set. */
p->state = ORDER_IMPLICIT_NONE;
break;
case ST_IMPLICIT:
if (p->state > ORDER_IMPLICIT)
goto order;
p->state = ORDER_IMPLICIT;
break;
case ST_FORMAT:
case ST_ENTRY:
if (p->state < ORDER_IMPLICIT_NONE)
p->state = ORDER_IMPLICIT_NONE;
break;
case ST_PARAMETER:
if (p->state >= ORDER_EXEC)
goto order;
if (p->state < ORDER_IMPLICIT)
p->state = ORDER_IMPLICIT;
break;
case ST_DATA:
if (p->state < ORDER_SPEC)
p->state = ORDER_SPEC;
break;
case ST_PUBLIC:
case ST_PRIVATE:
case ST_STRUCTURE_DECL:
case ST_DERIVED_DECL:
case_decl:
if (p->state >= ORDER_EXEC)
goto order;
if (p->state < ORDER_SPEC)
p->state = ORDER_SPEC;
break;
case_omp_decl:
/* The OpenMP/OpenACC directives have to be somewhere in the specification
part, but there are no further requirements on their ordering.
Thus don't adjust p->state, just ignore them. */
if (p->state >= ORDER_EXEC)
goto order;
break;
case_executable:
case_exec_markers:
if (p->state < ORDER_EXEC)
p->state = ORDER_EXEC;
break;
default:
return false;
}
/* All is well, record the statement in case we need it next time. */
p->where = gfc_current_locus;
p->last_statement = st;
return true;
order:
if (!silent)
gfc_error ("%s statement at %C cannot follow %s statement at %L",
gfc_ascii_statement (st),
gfc_ascii_statement (p->last_statement), &p->where);
return false;
}
/* Handle an unexpected end of file. This is a show-stopper... */
static void unexpected_eof (void) ATTRIBUTE_NORETURN;
static void
unexpected_eof (void)
{
gfc_state_data *p;
gfc_error ("Unexpected end of file in %qs", gfc_source_file);
/* Memory cleanup. Move to "second to last". */
for (p = gfc_state_stack; p && p->previous && p->previous->previous;
p = p->previous);
gfc_current_ns->code = (p && p->previous) ? p->head : NULL;
gfc_done_2 ();
longjmp (eof_buf, 1);
/* Avoids build error on systems where longjmp is not declared noreturn. */
gcc_unreachable ();
}
/* Parse the CONTAINS section of a derived type definition. */
gfc_access gfc_typebound_default_access;
static bool
parse_derived_contains (void)
{
gfc_state_data s;
bool seen_private = false;
bool seen_comps = false;
bool error_flag = false;
bool to_finish;
gcc_assert (gfc_current_state () == COMP_DERIVED);
gcc_assert (gfc_current_block ());
/* Derived-types with SEQUENCE and/or BIND(C) must not have a CONTAINS
section. */
if (gfc_current_block ()->attr.sequence)
gfc_error ("Derived-type %qs with SEQUENCE must not have a CONTAINS"
" section at %C", gfc_current_block ()->name);
if (gfc_current_block ()->attr.is_bind_c)
gfc_error ("Derived-type %qs with BIND(C) must not have a CONTAINS"
" section at %C", gfc_current_block ()->name);
accept_statement (ST_CONTAINS);
push_state (&s, COMP_DERIVED_CONTAINS, NULL);
gfc_typebound_default_access = ACCESS_PUBLIC;
to_finish = false;
while (!to_finish)
{
gfc_statement st;
st = next_statement ();
switch (st)
{
case ST_NONE:
unexpected_eof ();
break;
case ST_DATA_DECL:
gfc_error ("Components in TYPE at %C must precede CONTAINS");
goto error;
case ST_PROCEDURE:
if (!gfc_notify_std (GFC_STD_F2003, "Type-bound procedure at %C"))
goto error;
accept_statement (ST_PROCEDURE);
seen_comps = true;
break;
case ST_GENERIC:
if (!gfc_notify_std (GFC_STD_F2003, "GENERIC binding at %C"))
goto error;
accept_statement (ST_GENERIC);
seen_comps = true;
break;
case ST_FINAL:
if (!gfc_notify_std (GFC_STD_F2003, "FINAL procedure declaration"
" at %C"))
goto error;
accept_statement (ST_FINAL);
seen_comps = true;
break;
case ST_END_TYPE:
to_finish = true;
if (!seen_comps
&& (!gfc_notify_std(GFC_STD_F2008, "Derived type definition "
"at %C with empty CONTAINS section")))
goto error;
/* ST_END_TYPE is accepted by parse_derived after return. */
break;
case ST_PRIVATE:
if (!gfc_find_state (COMP_MODULE))
{
gfc_error ("PRIVATE statement in TYPE at %C must be inside "
"a MODULE");
goto error;
}
if (seen_comps)
{
gfc_error ("PRIVATE statement at %C must precede procedure"
" bindings");
goto error;
}
if (seen_private)
{
gfc_error ("Duplicate PRIVATE statement at %C");
goto error;
}
accept_statement (ST_PRIVATE);
gfc_typebound_default_access = ACCESS_PRIVATE;
seen_private = true;
break;
case ST_SEQUENCE:
gfc_error ("SEQUENCE statement at %C must precede CONTAINS");
goto error;
case ST_CONTAINS:
gfc_error ("Already inside a CONTAINS block at %C");
goto error;
default:
unexpected_statement (st);
break;
}
continue;
error:
error_flag = true;
reject_statement ();
}
pop_state ();
gcc_assert (gfc_current_state () == COMP_DERIVED);
return error_flag;
}
/* Set attributes for the parent symbol based on the attributes of a component
and raise errors if conflicting attributes are found for the component. */
static void
check_component (gfc_symbol *sym, gfc_component *c, gfc_component **lockp,
gfc_component **eventp)
{
bool coarray, lock_type, event_type, allocatable, pointer;
coarray = lock_type = event_type = allocatable = pointer = false;
gfc_component *lock_comp = NULL, *event_comp = NULL;
if (lockp) lock_comp = *lockp;
if (eventp) event_comp = *eventp;
/* Look for allocatable components. */
if (c->attr.allocatable
|| (c->ts.type == BT_CLASS && c->attr.class_ok
&& CLASS_DATA (c)->attr.allocatable)
|| (c->ts.type == BT_DERIVED && !c->attr.pointer
&& c->ts.u.derived->attr.alloc_comp))
{
allocatable = true;
sym->attr.alloc_comp = 1;
}
/* Look for pointer components. */
if (c->attr.pointer
|| (c->ts.type == BT_CLASS && c->attr.class_ok
&& CLASS_DATA (c)->attr.class_pointer)
|| (c->ts.type == BT_DERIVED && c->ts.u.derived->attr.pointer_comp))
{
pointer = true;
sym->attr.pointer_comp = 1;
}
/* Look for procedure pointer components. */
if (c->attr.proc_pointer
|| (c->ts.type == BT_DERIVED
&& c->ts.u.derived->attr.proc_pointer_comp))
sym->attr.proc_pointer_comp = 1;
/* Looking for coarray components. */
if (c->attr.codimension
|| (c->ts.type == BT_CLASS && c->attr.class_ok
&& CLASS_DATA (c)->attr.codimension))
{
coarray = true;
sym->attr.coarray_comp = 1;
}
if (c->ts.type == BT_DERIVED && c->ts.u.derived->attr.coarray_comp
&& !c->attr.pointer)
{
coarray = true;
sym->attr.coarray_comp = 1;
}
/* Looking for lock_type components. */
if ((c->ts.type == BT_DERIVED
&& c->ts.u.derived->from_intmod == INTMOD_ISO_FORTRAN_ENV
&& c->ts.u.derived->intmod_sym_id == ISOFORTRAN_LOCK_TYPE)
|| (c->ts.type == BT_CLASS && c->attr.class_ok
&& CLASS_DATA (c)->ts.u.derived->from_intmod
== INTMOD_ISO_FORTRAN_ENV
&& CLASS_DATA (c)-><