1 /* IO Code translation/library interface
2 Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008 Free Software
4 Contributed by Paul Brook
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 3, or (at your option) any later
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
25 #include "coretypes.h"
27 #include "tree-gimple.h"
33 #include "trans-stmt.h"
34 #include "trans-array.h"
35 #include "trans-types.h"
36 #include "trans-const.h"
38 /* Members of the ioparm structure. */
66 typedef struct gfc_st_parameter_field GTY(())
70 enum ioparam_type param_type;
71 enum iofield_type type;
75 gfc_st_parameter_field;
77 typedef struct gfc_st_parameter GTY(())
86 #define IOPARM(param_type, name, mask, type) IOPARM_##param_type##_##name,
92 static GTY(()) gfc_st_parameter st_parameter[] =
102 static GTY(()) gfc_st_parameter_field st_parameter_field[] =
104 #define IOPARM(param_type, name, mask, type) \
105 { #name, mask, IOPARM_ptype_##param_type, IOPARM_type_##type, NULL, NULL },
106 #include "ioparm.def"
108 { NULL, 0, 0, 0, NULL, NULL }
111 /* Library I/O subroutines */
129 IOCALL_IOLENGTH_DONE,
135 IOCALL_SET_NML_VAL_DIM,
139 static GTY(()) tree iocall[IOCALL_NUM];
141 /* Variable for keeping track of what the last data transfer statement
142 was. Used for deciding which subroutine to call when the data
143 transfer is complete. */
144 static enum { READ, WRITE, IOLENGTH } last_dt;
146 /* The data transfer parameter block that should be shared by all
147 data transfer calls belonging to the same read/write/iolength. */
148 static GTY(()) tree dt_parm;
149 static stmtblock_t *dt_post_end_block;
152 gfc_build_st_parameter (enum ioparam_type ptype, tree *types)
155 gfc_st_parameter_field *p;
158 tree t = make_node (RECORD_TYPE);
160 len = strlen (st_parameter[ptype].name);
161 gcc_assert (len <= sizeof (name) - sizeof ("__st_parameter_"));
162 memcpy (name, "__st_parameter_", sizeof ("__st_parameter_"));
163 memcpy (name + sizeof ("__st_parameter_") - 1, st_parameter[ptype].name,
165 TYPE_NAME (t) = get_identifier (name);
167 for (type = 0, p = st_parameter_field; type < IOPARM_field_num; type++, p++)
168 if (p->param_type == ptype)
171 case IOPARM_type_int4:
172 case IOPARM_type_intio:
173 case IOPARM_type_pint4:
174 case IOPARM_type_pintio:
175 case IOPARM_type_parray:
176 case IOPARM_type_pchar:
177 case IOPARM_type_pad:
178 p->field = gfc_add_field_to_struct (&TYPE_FIELDS (t), t,
179 get_identifier (p->name),
182 case IOPARM_type_char1:
183 p->field = gfc_add_field_to_struct (&TYPE_FIELDS (t), t,
184 get_identifier (p->name),
187 case IOPARM_type_char2:
188 len = strlen (p->name);
189 gcc_assert (len <= sizeof (name) - sizeof ("_len"));
190 memcpy (name, p->name, len);
191 memcpy (name + len, "_len", sizeof ("_len"));
192 p->field_len = gfc_add_field_to_struct (&TYPE_FIELDS (t), t,
193 get_identifier (name),
194 gfc_charlen_type_node);
195 if (p->type == IOPARM_type_char2)
196 p->field = gfc_add_field_to_struct (&TYPE_FIELDS (t), t,
197 get_identifier (p->name),
200 case IOPARM_type_common:
202 = gfc_add_field_to_struct (&TYPE_FIELDS (t), t,
203 get_identifier (p->name),
204 st_parameter[IOPARM_ptype_common].type);
206 case IOPARM_type_num:
211 st_parameter[ptype].type = t;
215 /* Build code to test an error condition and call generate_error if needed.
216 Note: This builds calls to generate_error in the runtime library function.
217 The function generate_error is dependent on certain parameters in the
218 st_parameter_common flags to be set. (See libgfortran/runtime/error.c)
219 Therefore, the code to set these flags must be generated before
220 this function is used. */
223 gfc_trans_io_runtime_check (tree cond, tree var, int error_code,
224 const char * msgid, stmtblock_t * pblock)
229 tree arg1, arg2, arg3;
232 if (integer_zerop (cond))
235 /* The code to generate the error. */
236 gfc_start_block (&block);
238 arg1 = build_fold_addr_expr (var);
240 arg2 = build_int_cst (integer_type_node, error_code),
242 asprintf (&message, "%s", _(msgid));
243 arg3 = gfc_build_addr_expr (pchar_type_node,
244 gfc_build_localized_cstring_const (message));
247 tmp = build_call_expr (gfor_fndecl_generate_error, 3, arg1, arg2, arg3);
249 gfc_add_expr_to_block (&block, tmp);
251 body = gfc_finish_block (&block);
253 if (integer_onep (cond))
255 gfc_add_expr_to_block (pblock, body);
259 /* Tell the compiler that this isn't likely. */
260 cond = fold_convert (long_integer_type_node, cond);
261 tmp = build_int_cst (long_integer_type_node, 0);
262 cond = build_call_expr (built_in_decls[BUILT_IN_EXPECT], 2, cond, tmp);
263 cond = fold_convert (boolean_type_node, cond);
265 tmp = build3_v (COND_EXPR, cond, body, build_empty_stmt ());
266 gfc_add_expr_to_block (pblock, tmp);
271 /* Create function decls for IO library functions. */
274 gfc_build_io_library_fndecls (void)
276 tree types[IOPARM_type_num], pad_idx, gfc_int4_type_node;
277 tree gfc_intio_type_node;
278 tree parm_type, dt_parm_type;
279 HOST_WIDE_INT pad_size;
280 enum ioparam_type ptype;
282 types[IOPARM_type_int4] = gfc_int4_type_node = gfc_get_int_type (4);
283 types[IOPARM_type_intio] = gfc_intio_type_node
284 = gfc_get_int_type (gfc_intio_kind);
285 types[IOPARM_type_pint4] = build_pointer_type (gfc_int4_type_node);
286 types[IOPARM_type_pintio]
287 = build_pointer_type (gfc_intio_type_node);
288 types[IOPARM_type_parray] = pchar_type_node;
289 types[IOPARM_type_pchar] = pchar_type_node;
290 pad_size = 16 * TREE_INT_CST_LOW (TYPE_SIZE_UNIT (pchar_type_node));
291 pad_size += 32 * TREE_INT_CST_LOW (TYPE_SIZE_UNIT (integer_type_node));
292 pad_idx = build_index_type (build_int_cst (NULL_TREE, pad_size));
293 types[IOPARM_type_pad] = build_array_type (char_type_node, pad_idx);
295 /* pad actually contains pointers and integers so it needs to have an
296 alignment that is at least as large as the needed alignment for those
297 types. See the st_parameter_dt structure in libgfortran/io/io.h for
298 what really goes into this space. */
299 TYPE_ALIGN (types[IOPARM_type_pad]) = MAX (TYPE_ALIGN (pchar_type_node),
300 TYPE_ALIGN (gfc_get_int_type (gfc_max_integer_kind)));
302 for (ptype = IOPARM_ptype_common; ptype < IOPARM_ptype_num; ptype++)
303 gfc_build_st_parameter (ptype, types);
305 /* Define the transfer functions. */
307 dt_parm_type = build_pointer_type (st_parameter[IOPARM_ptype_dt].type);
309 iocall[IOCALL_X_INTEGER] =
310 gfc_build_library_function_decl (get_identifier
311 (PREFIX("transfer_integer")),
312 void_type_node, 3, dt_parm_type,
313 pvoid_type_node, gfc_int4_type_node);
315 iocall[IOCALL_X_LOGICAL] =
316 gfc_build_library_function_decl (get_identifier
317 (PREFIX("transfer_logical")),
318 void_type_node, 3, dt_parm_type,
319 pvoid_type_node, gfc_int4_type_node);
321 iocall[IOCALL_X_CHARACTER] =
322 gfc_build_library_function_decl (get_identifier
323 (PREFIX("transfer_character")),
324 void_type_node, 3, dt_parm_type,
325 pvoid_type_node, gfc_int4_type_node);
327 iocall[IOCALL_X_REAL] =
328 gfc_build_library_function_decl (get_identifier (PREFIX("transfer_real")),
329 void_type_node, 3, dt_parm_type,
330 pvoid_type_node, gfc_int4_type_node);
332 iocall[IOCALL_X_COMPLEX] =
333 gfc_build_library_function_decl (get_identifier
334 (PREFIX("transfer_complex")),
335 void_type_node, 3, dt_parm_type,
336 pvoid_type_node, gfc_int4_type_node);
338 iocall[IOCALL_X_ARRAY] =
339 gfc_build_library_function_decl (get_identifier
340 (PREFIX("transfer_array")),
341 void_type_node, 4, dt_parm_type,
342 pvoid_type_node, integer_type_node,
343 gfc_charlen_type_node);
345 /* Library entry points */
347 iocall[IOCALL_READ] =
348 gfc_build_library_function_decl (get_identifier (PREFIX("st_read")),
349 void_type_node, 1, dt_parm_type);
351 iocall[IOCALL_WRITE] =
352 gfc_build_library_function_decl (get_identifier (PREFIX("st_write")),
353 void_type_node, 1, dt_parm_type);
355 parm_type = build_pointer_type (st_parameter[IOPARM_ptype_open].type);
356 iocall[IOCALL_OPEN] =
357 gfc_build_library_function_decl (get_identifier (PREFIX("st_open")),
358 void_type_node, 1, parm_type);
361 parm_type = build_pointer_type (st_parameter[IOPARM_ptype_close].type);
362 iocall[IOCALL_CLOSE] =
363 gfc_build_library_function_decl (get_identifier (PREFIX("st_close")),
364 void_type_node, 1, parm_type);
366 parm_type = build_pointer_type (st_parameter[IOPARM_ptype_inquire].type);
367 iocall[IOCALL_INQUIRE] =
368 gfc_build_library_function_decl (get_identifier (PREFIX("st_inquire")),
369 gfc_int4_type_node, 1, parm_type);
371 iocall[IOCALL_IOLENGTH] =
372 gfc_build_library_function_decl(get_identifier (PREFIX("st_iolength")),
373 void_type_node, 1, dt_parm_type);
375 parm_type = build_pointer_type (st_parameter[IOPARM_ptype_filepos].type);
376 iocall[IOCALL_REWIND] =
377 gfc_build_library_function_decl (get_identifier (PREFIX("st_rewind")),
378 gfc_int4_type_node, 1, parm_type);
380 iocall[IOCALL_BACKSPACE] =
381 gfc_build_library_function_decl (get_identifier (PREFIX("st_backspace")),
382 gfc_int4_type_node, 1, parm_type);
384 iocall[IOCALL_ENDFILE] =
385 gfc_build_library_function_decl (get_identifier (PREFIX("st_endfile")),
386 gfc_int4_type_node, 1, parm_type);
388 iocall[IOCALL_FLUSH] =
389 gfc_build_library_function_decl (get_identifier (PREFIX("st_flush")),
390 gfc_int4_type_node, 1, parm_type);
392 /* Library helpers */
394 iocall[IOCALL_READ_DONE] =
395 gfc_build_library_function_decl (get_identifier (PREFIX("st_read_done")),
396 gfc_int4_type_node, 1, dt_parm_type);
398 iocall[IOCALL_WRITE_DONE] =
399 gfc_build_library_function_decl (get_identifier (PREFIX("st_write_done")),
400 gfc_int4_type_node, 1, dt_parm_type);
402 iocall[IOCALL_IOLENGTH_DONE] =
403 gfc_build_library_function_decl (get_identifier (PREFIX("st_iolength_done")),
404 gfc_int4_type_node, 1, dt_parm_type);
407 iocall[IOCALL_SET_NML_VAL] =
408 gfc_build_library_function_decl (get_identifier (PREFIX("st_set_nml_var")),
409 void_type_node, 6, dt_parm_type,
410 pvoid_type_node, pvoid_type_node,
411 gfc_int4_type_node, gfc_charlen_type_node,
414 iocall[IOCALL_SET_NML_VAL_DIM] =
415 gfc_build_library_function_decl (get_identifier (PREFIX("st_set_nml_var_dim")),
416 void_type_node, 5, dt_parm_type,
417 gfc_int4_type_node, gfc_array_index_type,
418 gfc_array_index_type, gfc_array_index_type);
422 /* Generate code to store an integer constant into the
423 st_parameter_XXX structure. */
426 set_parameter_const (stmtblock_t *block, tree var, enum iofield type,
430 gfc_st_parameter_field *p = &st_parameter_field[type];
432 if (p->param_type == IOPARM_ptype_common)
433 var = fold_build3 (COMPONENT_REF, st_parameter[IOPARM_ptype_common].type,
434 var, TYPE_FIELDS (TREE_TYPE (var)), NULL_TREE);
435 tmp = fold_build3 (COMPONENT_REF, TREE_TYPE (p->field), var, p->field,
437 gfc_add_modify_expr (block, tmp, build_int_cst (TREE_TYPE (p->field), val));
442 /* Generate code to store a non-string I/O parameter into the
443 st_parameter_XXX structure. This is a pass by value. */
446 set_parameter_value (stmtblock_t *block, tree var, enum iofield type,
451 gfc_st_parameter_field *p = &st_parameter_field[type];
452 tree dest_type = TREE_TYPE (p->field);
454 gfc_init_se (&se, NULL);
455 gfc_conv_expr_val (&se, e);
457 /* If we're storing a UNIT number, we need to check it first. */
458 if (type == IOPARM_common_unit && e->ts.kind != 4)
463 /* Don't evaluate the UNIT number multiple times. */
464 se.expr = gfc_evaluate_now (se.expr, &se.pre);
466 /* UNIT numbers should be nonnegative. */
467 cond = fold_build2 (LT_EXPR, boolean_type_node, se.expr,
468 build_int_cst (TREE_TYPE (se.expr),0));
469 gfc_trans_io_runtime_check (cond, var, LIBERROR_BAD_UNIT,
470 "Negative unit number in I/O statement",
473 /* UNIT numbers should be less than the max. */
474 i = gfc_validate_kind (BT_INTEGER, 4, false);
475 max = gfc_conv_mpz_to_tree (gfc_integer_kinds[i].huge, 4);
476 cond = fold_build2 (GT_EXPR, boolean_type_node, se.expr,
477 fold_convert (TREE_TYPE (se.expr), max));
478 gfc_trans_io_runtime_check (cond, var, LIBERROR_BAD_UNIT,
479 "Unit number in I/O statement too large",
484 se.expr = convert (dest_type, se.expr);
485 gfc_add_block_to_block (block, &se.pre);
487 if (p->param_type == IOPARM_ptype_common)
488 var = fold_build3 (COMPONENT_REF, st_parameter[IOPARM_ptype_common].type,
489 var, TYPE_FIELDS (TREE_TYPE (var)), NULL_TREE);
491 tmp = fold_build3 (COMPONENT_REF, dest_type, var, p->field, NULL_TREE);
492 gfc_add_modify_expr (block, tmp, se.expr);
497 /* Generate code to store a non-string I/O parameter into the
498 st_parameter_XXX structure. This is pass by reference. */
501 set_parameter_ref (stmtblock_t *block, stmtblock_t *postblock,
502 tree var, enum iofield type, gfc_expr *e)
506 gfc_st_parameter_field *p = &st_parameter_field[type];
508 gcc_assert (e->ts.type == BT_INTEGER || e->ts.type == BT_LOGICAL);
509 gfc_init_se (&se, NULL);
510 gfc_conv_expr_lhs (&se, e);
512 gfc_add_block_to_block (block, &se.pre);
514 if (TYPE_MODE (TREE_TYPE (se.expr))
515 == TYPE_MODE (TREE_TYPE (TREE_TYPE (p->field))))
517 addr = convert (TREE_TYPE (p->field), build_fold_addr_expr (se.expr));
519 /* If this is for the iostat variable initialize the
520 user variable to LIBERROR_OK which is zero. */
521 if (type == IOPARM_common_iostat)
522 gfc_add_modify_expr (block, se.expr,
523 build_int_cst (TREE_TYPE (se.expr), LIBERROR_OK));
527 /* The type used by the library has different size
528 from the type of the variable supplied by the user.
529 Need to use a temporary. */
530 tree tmpvar = gfc_create_var (TREE_TYPE (TREE_TYPE (p->field)),
531 st_parameter_field[type].name);
533 /* If this is for the iostat variable, initialize the
534 user variable to LIBERROR_OK which is zero. */
535 if (type == IOPARM_common_iostat)
536 gfc_add_modify_expr (block, tmpvar,
537 build_int_cst (TREE_TYPE (tmpvar), LIBERROR_OK));
539 addr = build_fold_addr_expr (tmpvar);
540 /* After the I/O operation, we set the variable from the temporary. */
541 tmp = convert (TREE_TYPE (se.expr), tmpvar);
542 gfc_add_modify_expr (postblock, se.expr, tmp);
545 if (p->param_type == IOPARM_ptype_common)
546 var = fold_build3 (COMPONENT_REF, st_parameter[IOPARM_ptype_common].type,
547 var, TYPE_FIELDS (TREE_TYPE (var)), NULL_TREE);
548 tmp = fold_build3 (COMPONENT_REF, TREE_TYPE (p->field),
549 var, p->field, NULL_TREE);
550 gfc_add_modify_expr (block, tmp, addr);
554 /* Given an array expr, find its address and length to get a string. If the
555 array is full, the string's address is the address of array's first element
556 and the length is the size of the whole array. If it is an element, the
557 string's address is the element's address and the length is the rest size of
562 gfc_convert_array_to_string (gfc_se * se, gfc_expr * e)
571 sym = e->symtree->n.sym;
572 rank = sym->as->rank - 1;
574 if (e->ref->u.ar.type == AR_FULL)
576 se->expr = gfc_get_symbol_decl (sym);
577 se->expr = gfc_conv_array_data (se->expr);
581 gfc_conv_expr (se, e);
584 array = sym->backend_decl;
585 type = TREE_TYPE (array);
587 if (GFC_ARRAY_TYPE_P (type))
588 size = GFC_TYPE_ARRAY_SIZE (type);
591 gcc_assert (GFC_DESCRIPTOR_TYPE_P (type));
592 size = gfc_conv_array_stride (array, rank);
593 tmp = fold_build2 (MINUS_EXPR, gfc_array_index_type,
594 gfc_conv_array_ubound (array, rank),
595 gfc_conv_array_lbound (array, rank));
596 tmp = fold_build2 (PLUS_EXPR, gfc_array_index_type, tmp,
598 size = fold_build2 (MULT_EXPR, gfc_array_index_type, tmp, size);
603 /* If it is an element, we need the its address and size of the rest. */
604 if (e->ref->u.ar.type == AR_ELEMENT)
606 size = fold_build2 (MINUS_EXPR, gfc_array_index_type, size,
607 TREE_OPERAND (se->expr, 1));
608 se->expr = build_fold_addr_expr (se->expr);
611 tmp = TYPE_SIZE_UNIT (gfc_get_element_type (type));
612 size = fold_build2 (MULT_EXPR, gfc_array_index_type, size,
613 fold_convert (gfc_array_index_type, tmp));
615 se->string_length = fold_convert (gfc_charlen_type_node, size);
619 /* Generate code to store a string and its length into the
620 st_parameter_XXX structure. */
623 set_string (stmtblock_t * block, stmtblock_t * postblock, tree var,
624 enum iofield type, gfc_expr * e)
630 gfc_st_parameter_field *p = &st_parameter_field[type];
632 gfc_init_se (&se, NULL);
634 if (p->param_type == IOPARM_ptype_common)
635 var = fold_build3 (COMPONENT_REF, st_parameter[IOPARM_ptype_common].type,
636 var, TYPE_FIELDS (TREE_TYPE (var)), NULL_TREE);
637 io = fold_build3 (COMPONENT_REF, TREE_TYPE (p->field),
638 var, p->field, NULL_TREE);
639 len = fold_build3 (COMPONENT_REF, TREE_TYPE (p->field_len),
640 var, p->field_len, NULL_TREE);
642 /* Integer variable assigned a format label. */
643 if (e->ts.type == BT_INTEGER && e->symtree->n.sym->attr.assign == 1)
648 gfc_conv_label_variable (&se, e);
649 tmp = GFC_DECL_STRING_LEN (se.expr);
650 cond = fold_build2 (LT_EXPR, boolean_type_node,
651 tmp, build_int_cst (TREE_TYPE (tmp), 0));
653 asprintf(&msg, "Label assigned to variable '%s' (%%ld) is not a format "
654 "label", e->symtree->name);
655 gfc_trans_runtime_check (cond, &se.pre, &e->where, msg,
656 fold_convert (long_integer_type_node, tmp));
659 gfc_add_modify_expr (&se.pre, io,
660 fold_convert (TREE_TYPE (io), GFC_DECL_ASSIGN_ADDR (se.expr)));
661 gfc_add_modify_expr (&se.pre, len, GFC_DECL_STRING_LEN (se.expr));
665 /* General character. */
666 if (e->ts.type == BT_CHARACTER && e->rank == 0)
667 gfc_conv_expr (&se, e);
668 /* Array assigned Hollerith constant or character array. */
669 else if (e->symtree && (e->symtree->n.sym->as->rank > 0))
670 gfc_convert_array_to_string (&se, e);
674 gfc_conv_string_parameter (&se);
675 gfc_add_modify_expr (&se.pre, io, fold_convert (TREE_TYPE (io), se.expr));
676 gfc_add_modify_expr (&se.pre, len, se.string_length);
679 gfc_add_block_to_block (block, &se.pre);
680 gfc_add_block_to_block (postblock, &se.post);
685 /* Generate code to store the character (array) and the character length
686 for an internal unit. */
689 set_internal_unit (stmtblock_t * block, stmtblock_t * post_block,
690 tree var, gfc_expr * e)
697 gfc_st_parameter_field *p;
700 gfc_init_se (&se, NULL);
702 p = &st_parameter_field[IOPARM_dt_internal_unit];
704 io = fold_build3 (COMPONENT_REF, TREE_TYPE (p->field),
705 var, p->field, NULL_TREE);
706 len = fold_build3 (COMPONENT_REF, TREE_TYPE (p->field_len),
707 var, p->field_len, NULL_TREE);
708 p = &st_parameter_field[IOPARM_dt_internal_unit_desc];
709 desc = fold_build3 (COMPONENT_REF, TREE_TYPE (p->field),
710 var, p->field, NULL_TREE);
712 gcc_assert (e->ts.type == BT_CHARACTER);
714 /* Character scalars. */
717 gfc_conv_expr (&se, e);
718 gfc_conv_string_parameter (&se);
720 se.expr = build_int_cst (pchar_type_node, 0);
723 /* Character array. */
724 else if (e->rank > 0)
726 se.ss = gfc_walk_expr (e);
728 if (is_subref_array (e))
730 /* Use a temporary for components of arrays of derived types
731 or substring array references. */
732 gfc_conv_subref_array_arg (&se, e, 0,
733 last_dt == READ ? INTENT_IN : INTENT_OUT);
734 tmp = build_fold_indirect_ref (se.expr);
735 se.expr = gfc_build_addr_expr (pchar_type_node, tmp);
736 tmp = gfc_conv_descriptor_data_get (tmp);
740 /* Return the data pointer and rank from the descriptor. */
741 gfc_conv_expr_descriptor (&se, e, se.ss);
742 tmp = gfc_conv_descriptor_data_get (se.expr);
743 se.expr = gfc_build_addr_expr (pchar_type_node, se.expr);
749 /* The cast is needed for character substrings and the descriptor
751 gfc_add_modify_expr (&se.pre, io, fold_convert (TREE_TYPE (io), tmp));
752 gfc_add_modify_expr (&se.pre, len,
753 fold_convert (TREE_TYPE (len), se.string_length));
754 gfc_add_modify_expr (&se.pre, desc, se.expr);
756 gfc_add_block_to_block (block, &se.pre);
757 gfc_add_block_to_block (post_block, &se.post);
761 /* Add a case to a IO-result switch. */
764 add_case (int label_value, gfc_st_label * label, stmtblock_t * body)
769 return; /* No label, no case */
771 value = build_int_cst (NULL_TREE, label_value);
773 /* Make a backend label for this case. */
774 tmp = gfc_build_label_decl (NULL_TREE);
776 /* And the case itself. */
777 tmp = build3_v (CASE_LABEL_EXPR, value, NULL_TREE, tmp);
778 gfc_add_expr_to_block (body, tmp);
780 /* Jump to the label. */
781 tmp = build1_v (GOTO_EXPR, gfc_get_label_decl (label));
782 gfc_add_expr_to_block (body, tmp);
786 /* Generate a switch statement that branches to the correct I/O
787 result label. The last statement of an I/O call stores the
788 result into a variable because there is often cleanup that
789 must be done before the switch, so a temporary would have to
790 be created anyway. */
793 io_result (stmtblock_t * block, tree var, gfc_st_label * err_label,
794 gfc_st_label * end_label, gfc_st_label * eor_label)
798 gfc_st_parameter_field *p = &st_parameter_field[IOPARM_common_flags];
800 /* If no labels are specified, ignore the result instead
801 of building an empty switch. */
802 if (err_label == NULL
804 && eor_label == NULL)
807 /* Build a switch statement. */
808 gfc_start_block (&body);
810 /* The label values here must be the same as the values
811 in the library_return enum in the runtime library */
812 add_case (1, err_label, &body);
813 add_case (2, end_label, &body);
814 add_case (3, eor_label, &body);
816 tmp = gfc_finish_block (&body);
818 var = fold_build3 (COMPONENT_REF, st_parameter[IOPARM_ptype_common].type,
819 var, TYPE_FIELDS (TREE_TYPE (var)), NULL_TREE);
820 rc = fold_build3 (COMPONENT_REF, TREE_TYPE (p->field),
821 var, p->field, NULL_TREE);
822 rc = fold_build2 (BIT_AND_EXPR, TREE_TYPE (rc),
823 rc, build_int_cst (TREE_TYPE (rc),
824 IOPARM_common_libreturn_mask));
826 tmp = build3_v (SWITCH_EXPR, rc, tmp, NULL_TREE);
828 gfc_add_expr_to_block (block, tmp);
832 /* Store the current file and line number to variables so that if a
833 library call goes awry, we can tell the user where the problem is. */
836 set_error_locus (stmtblock_t * block, tree var, locus * where)
839 tree str, locus_file;
841 gfc_st_parameter_field *p = &st_parameter_field[IOPARM_common_filename];
843 locus_file = fold_build3 (COMPONENT_REF,
844 st_parameter[IOPARM_ptype_common].type,
845 var, TYPE_FIELDS (TREE_TYPE (var)), NULL_TREE);
846 locus_file = fold_build3 (COMPONENT_REF, TREE_TYPE (p->field),
847 locus_file, p->field, NULL_TREE);
849 str = gfc_build_cstring_const (f->filename);
851 str = gfc_build_addr_expr (pchar_type_node, str);
852 gfc_add_modify_expr (block, locus_file, str);
854 line = LOCATION_LINE (where->lb->location);
855 set_parameter_const (block, var, IOPARM_common_line, line);
859 /* Translate an OPEN statement. */
862 gfc_trans_open (gfc_code * code)
864 stmtblock_t block, post_block;
867 unsigned int mask = 0;
869 gfc_start_block (&block);
870 gfc_init_block (&post_block);
872 var = gfc_create_var (st_parameter[IOPARM_ptype_open].type, "open_parm");
874 set_error_locus (&block, var, &code->loc);
878 mask |= set_string (&block, &post_block, var, IOPARM_common_iomsg,
882 mask |= set_parameter_ref (&block, &post_block, var, IOPARM_common_iostat,
886 mask |= IOPARM_common_err;
889 mask |= set_string (&block, &post_block, var, IOPARM_open_file, p->file);
892 mask |= set_string (&block, &post_block, var, IOPARM_open_status,
896 mask |= set_string (&block, &post_block, var, IOPARM_open_access,
900 mask |= set_string (&block, &post_block, var, IOPARM_open_form, p->form);
903 mask |= set_parameter_value (&block, var, IOPARM_open_recl_in, p->recl);
906 mask |= set_string (&block, &post_block, var, IOPARM_open_blank,
910 mask |= set_string (&block, &post_block, var, IOPARM_open_position,
914 mask |= set_string (&block, &post_block, var, IOPARM_open_action,
918 mask |= set_string (&block, &post_block, var, IOPARM_open_delim,
922 mask |= set_string (&block, &post_block, var, IOPARM_open_pad, p->pad);
925 mask |= set_string (&block, &post_block, var, IOPARM_open_convert,
928 set_parameter_const (&block, var, IOPARM_common_flags, mask);
931 set_parameter_value (&block, var, IOPARM_common_unit, p->unit);
933 set_parameter_const (&block, var, IOPARM_common_unit, 0);
935 tmp = build_fold_addr_expr (var);
936 tmp = build_call_expr (iocall[IOCALL_OPEN], 1, tmp);
937 gfc_add_expr_to_block (&block, tmp);
939 gfc_add_block_to_block (&block, &post_block);
941 io_result (&block, var, p->err, NULL, NULL);
943 return gfc_finish_block (&block);
947 /* Translate a CLOSE statement. */
950 gfc_trans_close (gfc_code * code)
952 stmtblock_t block, post_block;
955 unsigned int mask = 0;
957 gfc_start_block (&block);
958 gfc_init_block (&post_block);
960 var = gfc_create_var (st_parameter[IOPARM_ptype_close].type, "close_parm");
962 set_error_locus (&block, var, &code->loc);
966 mask |= set_string (&block, &post_block, var, IOPARM_common_iomsg,
970 mask |= set_parameter_ref (&block, &post_block, var, IOPARM_common_iostat,
974 mask |= IOPARM_common_err;
977 mask |= set_string (&block, &post_block, var, IOPARM_close_status,
980 set_parameter_const (&block, var, IOPARM_common_flags, mask);
983 set_parameter_value (&block, var, IOPARM_common_unit, p->unit);
985 set_parameter_const (&block, var, IOPARM_common_unit, 0);
987 tmp = build_fold_addr_expr (var);
988 tmp = build_call_expr (iocall[IOCALL_CLOSE], 1, tmp);
989 gfc_add_expr_to_block (&block, tmp);
991 gfc_add_block_to_block (&block, &post_block);
993 io_result (&block, var, p->err, NULL, NULL);
995 return gfc_finish_block (&block);
999 /* Common subroutine for building a file positioning statement. */
1002 build_filepos (tree function, gfc_code * code)
1004 stmtblock_t block, post_block;
1007 unsigned int mask = 0;
1009 p = code->ext.filepos;
1011 gfc_start_block (&block);
1012 gfc_init_block (&post_block);
1014 var = gfc_create_var (st_parameter[IOPARM_ptype_filepos].type,
1017 set_error_locus (&block, var, &code->loc);
1020 mask |= set_string (&block, &post_block, var, IOPARM_common_iomsg,
1024 mask |= set_parameter_ref (&block, &post_block, var, IOPARM_common_iostat,
1028 mask |= IOPARM_common_err;
1030 set_parameter_const (&block, var, IOPARM_common_flags, mask);
1033 set_parameter_value (&block, var, IOPARM_common_unit, p->unit);
1035 set_parameter_const (&block, var, IOPARM_common_unit, 0);
1037 tmp = build_fold_addr_expr (var);
1038 tmp = build_call_expr (function, 1, tmp);
1039 gfc_add_expr_to_block (&block, tmp);
1041 gfc_add_block_to_block (&block, &post_block);
1043 io_result (&block, var, p->err, NULL, NULL);
1045 return gfc_finish_block (&block);
1049 /* Translate a BACKSPACE statement. */
1052 gfc_trans_backspace (gfc_code * code)
1054 return build_filepos (iocall[IOCALL_BACKSPACE], code);
1058 /* Translate an ENDFILE statement. */
1061 gfc_trans_endfile (gfc_code * code)
1063 return build_filepos (iocall[IOCALL_ENDFILE], code);
1067 /* Translate a REWIND statement. */
1070 gfc_trans_rewind (gfc_code * code)
1072 return build_filepos (iocall[IOCALL_REWIND], code);
1076 /* Translate a FLUSH statement. */
1079 gfc_trans_flush (gfc_code * code)
1081 return build_filepos (iocall[IOCALL_FLUSH], code);
1085 /* Create a dummy iostat variable to catch any error due to bad unit. */
1088 create_dummy_iostat (void)
1093 gfc_get_ha_sym_tree ("@iostat", &st);
1094 st->n.sym->ts.type = BT_INTEGER;
1095 st->n.sym->ts.kind = gfc_default_integer_kind;
1096 gfc_set_sym_referenced (st->n.sym);
1097 gfc_commit_symbol (st->n.sym);
1098 st->n.sym->backend_decl
1099 = gfc_create_var (gfc_get_int_type (st->n.sym->ts.kind),
1102 e = gfc_get_expr ();
1103 e->expr_type = EXPR_VARIABLE;
1105 e->ts.type = BT_INTEGER;
1106 e->ts.kind = st->n.sym->ts.kind;
1112 /* Translate the non-IOLENGTH form of an INQUIRE statement. */
1115 gfc_trans_inquire (gfc_code * code)
1117 stmtblock_t block, post_block;
1120 unsigned int mask = 0;
1122 gfc_start_block (&block);
1123 gfc_init_block (&post_block);
1125 var = gfc_create_var (st_parameter[IOPARM_ptype_inquire].type,
1128 set_error_locus (&block, var, &code->loc);
1129 p = code->ext.inquire;
1132 mask |= set_string (&block, &post_block, var, IOPARM_common_iomsg,
1136 mask |= set_parameter_ref (&block, &post_block, var, IOPARM_common_iostat,
1140 mask |= IOPARM_common_err;
1143 if (p->unit && p->file)
1144 gfc_error ("INQUIRE statement at %L cannot contain both FILE and UNIT specifiers", &code->loc);
1147 mask |= set_string (&block, &post_block, var, IOPARM_inquire_file,
1152 mask |= set_parameter_ref (&block, &post_block, var, IOPARM_inquire_exist,
1155 if (p->unit && !p->iostat)
1157 p->iostat = create_dummy_iostat ();
1158 mask |= set_parameter_ref (&block, &post_block, var,
1159 IOPARM_common_iostat, p->iostat);
1164 mask |= set_parameter_ref (&block, &post_block, var, IOPARM_inquire_opened,
1168 mask |= set_parameter_ref (&block, &post_block, var, IOPARM_inquire_number,
1172 mask |= set_parameter_ref (&block, &post_block, var, IOPARM_inquire_named,
1176 mask |= set_string (&block, &post_block, var, IOPARM_inquire_name,
1180 mask |= set_string (&block, &post_block, var, IOPARM_inquire_access,
1184 mask |= set_string (&block, &post_block, var, IOPARM_inquire_sequential,
1188 mask |= set_string (&block, &post_block, var, IOPARM_inquire_direct,
1192 mask |= set_string (&block, &post_block, var, IOPARM_inquire_form,
1196 mask |= set_string (&block, &post_block, var, IOPARM_inquire_formatted,
1200 mask |= set_string (&block, &post_block, var, IOPARM_inquire_unformatted,
1204 mask |= set_parameter_ref (&block, &post_block, var,
1205 IOPARM_inquire_recl_out, p->recl);
1208 mask |= set_parameter_ref (&block, &post_block, var,
1209 IOPARM_inquire_nextrec, p->nextrec);
1212 mask |= set_string (&block, &post_block, var, IOPARM_inquire_blank,
1216 mask |= set_string (&block, &post_block, var, IOPARM_inquire_position,
1220 mask |= set_string (&block, &post_block, var, IOPARM_inquire_action,
1224 mask |= set_string (&block, &post_block, var, IOPARM_inquire_read,
1228 mask |= set_string (&block, &post_block, var, IOPARM_inquire_write,
1232 mask |= set_string (&block, &post_block, var, IOPARM_inquire_readwrite,
1236 mask |= set_string (&block, &post_block, var, IOPARM_inquire_delim,
1240 mask |= set_string (&block, &post_block, var, IOPARM_inquire_pad,
1244 mask |= set_string (&block, &post_block, var, IOPARM_inquire_convert,
1248 mask |= set_parameter_ref (&block, &post_block, var,
1249 IOPARM_inquire_strm_pos_out, p->strm_pos);
1251 set_parameter_const (&block, var, IOPARM_common_flags, mask);
1254 set_parameter_value (&block, var, IOPARM_common_unit, p->unit);
1256 set_parameter_const (&block, var, IOPARM_common_unit, 0);
1258 tmp = build_fold_addr_expr (var);
1259 tmp = build_call_expr (iocall[IOCALL_INQUIRE], 1, tmp);
1260 gfc_add_expr_to_block (&block, tmp);
1262 gfc_add_block_to_block (&block, &post_block);
1264 io_result (&block, var, p->err, NULL, NULL);
1266 return gfc_finish_block (&block);
1270 gfc_new_nml_name_expr (const char * name)
1272 gfc_expr * nml_name;
1274 nml_name = gfc_get_expr();
1275 nml_name->ref = NULL;
1276 nml_name->expr_type = EXPR_CONSTANT;
1277 nml_name->ts.kind = gfc_default_character_kind;
1278 nml_name->ts.type = BT_CHARACTER;
1279 nml_name->value.character.length = strlen(name);
1280 nml_name->value.character.string = gfc_getmem (strlen (name) + 1);
1281 strcpy (nml_name->value.character.string, name);
1286 /* nml_full_name builds up the fully qualified name of a
1287 derived type component. */
1290 nml_full_name (const char* var_name, const char* cmp_name)
1292 int full_name_length;
1295 full_name_length = strlen (var_name) + strlen (cmp_name) + 1;
1296 full_name = (char*)gfc_getmem (full_name_length + 1);
1297 strcpy (full_name, var_name);
1298 full_name = strcat (full_name, "%");
1299 full_name = strcat (full_name, cmp_name);
1303 /* nml_get_addr_expr builds an address expression from the
1304 gfc_symbol or gfc_component backend_decl's. An offset is
1305 provided so that the address of an element of an array of
1306 derived types is returned. This is used in the runtime to
1307 determine that span of the derived type. */
1310 nml_get_addr_expr (gfc_symbol * sym, gfc_component * c,
1313 tree decl = NULL_TREE;
1317 int dummy_arg_flagged;
1321 sym->attr.referenced = 1;
1322 decl = gfc_get_symbol_decl (sym);
1324 /* If this is the enclosing function declaration, use
1325 the fake result instead. */
1326 if (decl == current_function_decl)
1327 decl = gfc_get_fake_result_decl (sym, 0);
1328 else if (decl == DECL_CONTEXT (current_function_decl))
1329 decl = gfc_get_fake_result_decl (sym, 1);
1332 decl = c->backend_decl;
1334 gcc_assert (decl && ((TREE_CODE (decl) == FIELD_DECL
1335 || TREE_CODE (decl) == VAR_DECL
1336 || TREE_CODE (decl) == PARM_DECL)
1337 || TREE_CODE (decl) == COMPONENT_REF));
1341 /* Build indirect reference, if dummy argument. */
1343 dummy_arg_flagged = POINTER_TYPE_P (TREE_TYPE(tmp));
1345 itmp = (dummy_arg_flagged) ? build_fold_indirect_ref (tmp) : tmp;
1347 /* If an array, set flag and use indirect ref. if built. */
1349 array_flagged = (TREE_CODE (TREE_TYPE (itmp)) == ARRAY_TYPE
1350 && !TYPE_STRING_FLAG (TREE_TYPE (itmp)));
1355 /* Treat the component of a derived type, using base_addr for
1356 the derived type. */
1358 if (TREE_CODE (decl) == FIELD_DECL)
1359 tmp = fold_build3 (COMPONENT_REF, TREE_TYPE (tmp),
1360 base_addr, tmp, NULL_TREE);
1362 /* If we have a derived type component, a reference to the first
1363 element of the array is built. This is done so that base_addr,
1364 used in the build of the component reference, always points to
1368 tmp = gfc_build_array_ref (tmp, gfc_index_zero_node, NULL);
1370 /* Now build the address expression. */
1372 tmp = build_fold_addr_expr (tmp);
1374 /* If scalar dummy, resolve indirect reference now. */
1376 if (dummy_arg_flagged && !array_flagged)
1377 tmp = build_fold_indirect_ref (tmp);
1379 gcc_assert (tmp && POINTER_TYPE_P (TREE_TYPE (tmp)));
1384 /* For an object VAR_NAME whose base address is BASE_ADDR, generate a
1385 call to iocall[IOCALL_SET_NML_VAL]. For derived type variable, recursively
1386 generate calls to iocall[IOCALL_SET_NML_VAL] for each component. */
1388 #define IARG(i) build_int_cst (gfc_array_index_type, i)
1391 transfer_namelist_element (stmtblock_t * block, const char * var_name,
1392 gfc_symbol * sym, gfc_component * c,
1395 gfc_typespec * ts = NULL;
1396 gfc_array_spec * as = NULL;
1397 tree addr_expr = NULL;
1407 gcc_assert (sym || c);
1409 /* Build the namelist object name. */
1411 string = gfc_build_cstring_const (var_name);
1412 string = gfc_build_addr_expr (pchar_type_node, string);
1414 /* Build ts, as and data address using symbol or component. */
1416 ts = (sym) ? &sym->ts : &c->ts;
1417 as = (sym) ? sym->as : c->as;
1419 addr_expr = nml_get_addr_expr (sym, c, base_addr);
1426 dt = TREE_TYPE ((sym) ? sym->backend_decl : c->backend_decl);
1427 dtype = gfc_get_dtype (dt);
1431 itype = GFC_DTYPE_UNKNOWN;
1437 itype = GFC_DTYPE_INTEGER;
1440 itype = GFC_DTYPE_LOGICAL;
1443 itype = GFC_DTYPE_REAL;
1446 itype = GFC_DTYPE_COMPLEX;
1449 itype = GFC_DTYPE_DERIVED;
1452 itype = GFC_DTYPE_CHARACTER;
1458 dtype = IARG (itype << GFC_DTYPE_TYPE_SHIFT);
1461 /* Build up the arguments for the transfer call.
1462 The call for the scalar part transfers:
1463 (address, name, type, kind or string_length, dtype) */
1465 dt_parm_addr = build_fold_addr_expr (dt_parm);
1467 if (ts->type == BT_CHARACTER)
1468 tmp = ts->cl->backend_decl;
1470 tmp = build_int_cst (gfc_charlen_type_node, 0);
1471 tmp = build_call_expr (iocall[IOCALL_SET_NML_VAL], 6,
1472 dt_parm_addr, addr_expr, string,
1473 IARG (ts->kind), tmp, dtype);
1474 gfc_add_expr_to_block (block, tmp);
1476 /* If the object is an array, transfer rank times:
1477 (null pointer, name, stride, lbound, ubound) */
1479 for ( n_dim = 0 ; n_dim < rank ; n_dim++ )
1481 tmp = build_call_expr (iocall[IOCALL_SET_NML_VAL_DIM], 5,
1484 GFC_TYPE_ARRAY_STRIDE (dt, n_dim),
1485 GFC_TYPE_ARRAY_LBOUND (dt, n_dim),
1486 GFC_TYPE_ARRAY_UBOUND (dt, n_dim));
1487 gfc_add_expr_to_block (block, tmp);
1490 if (ts->type == BT_DERIVED)
1494 /* Provide the RECORD_TYPE to build component references. */
1496 tree expr = build_fold_indirect_ref (addr_expr);
1498 for (cmp = ts->derived->components; cmp; cmp = cmp->next)
1500 char *full_name = nml_full_name (var_name, cmp->name);
1501 transfer_namelist_element (block,
1504 gfc_free (full_name);
1511 /* Create a data transfer statement. Not all of the fields are valid
1512 for both reading and writing, but improper use has been filtered
1516 build_dt (tree function, gfc_code * code)
1518 stmtblock_t block, post_block, post_end_block, post_iu_block;
1523 unsigned int mask = 0;
1525 gfc_start_block (&block);
1526 gfc_init_block (&post_block);
1527 gfc_init_block (&post_end_block);
1528 gfc_init_block (&post_iu_block);
1530 var = gfc_create_var (st_parameter[IOPARM_ptype_dt].type, "dt_parm");
1532 set_error_locus (&block, var, &code->loc);
1534 if (last_dt == IOLENGTH)
1538 inq = code->ext.inquire;
1540 /* First check that preconditions are met. */
1541 gcc_assert (inq != NULL);
1542 gcc_assert (inq->iolength != NULL);
1544 /* Connect to the iolength variable. */
1545 mask |= set_parameter_ref (&block, &post_end_block, var,
1546 IOPARM_dt_iolength, inq->iolength);
1552 gcc_assert (dt != NULL);
1555 if (dt && dt->io_unit)
1557 if (dt->io_unit->ts.type == BT_CHARACTER)
1559 mask |= set_internal_unit (&block, &post_iu_block,
1561 set_parameter_const (&block, var, IOPARM_common_unit, 0);
1565 set_parameter_const (&block, var, IOPARM_common_unit, 0);
1570 mask |= set_string (&block, &post_block, var, IOPARM_common_iomsg,
1574 mask |= set_parameter_ref (&block, &post_end_block, var,
1575 IOPARM_common_iostat, dt->iostat);
1578 mask |= IOPARM_common_err;
1581 mask |= IOPARM_common_eor;
1584 mask |= IOPARM_common_end;
1587 mask |= set_parameter_value (&block, var, IOPARM_dt_rec, dt->rec);
1590 mask |= set_string (&block, &post_block, var, IOPARM_dt_advance,
1593 if (dt->format_expr)
1594 mask |= set_string (&block, &post_end_block, var, IOPARM_dt_format,
1597 if (dt->format_label)
1599 if (dt->format_label == &format_asterisk)
1600 mask |= IOPARM_dt_list_format;
1602 mask |= set_string (&block, &post_block, var, IOPARM_dt_format,
1603 dt->format_label->format);
1607 mask |= set_parameter_ref (&block, &post_end_block, var,
1608 IOPARM_dt_size, dt->size);
1612 if (dt->format_expr || dt->format_label)
1613 gfc_internal_error ("build_dt: format with namelist");
1615 nmlname = gfc_new_nml_name_expr (dt->namelist->name);
1617 mask |= set_string (&block, &post_block, var, IOPARM_dt_namelist_name,
1620 if (last_dt == READ)
1621 mask |= IOPARM_dt_namelist_read_mode;
1623 set_parameter_const (&block, var, IOPARM_common_flags, mask);
1627 for (nml = dt->namelist->namelist; nml; nml = nml->next)
1628 transfer_namelist_element (&block, nml->sym->name, nml->sym,
1632 set_parameter_const (&block, var, IOPARM_common_flags, mask);
1634 if (dt->io_unit && dt->io_unit->ts.type == BT_INTEGER)
1635 set_parameter_value (&block, var, IOPARM_common_unit, dt->io_unit);
1638 set_parameter_const (&block, var, IOPARM_common_flags, mask);
1640 tmp = build_fold_addr_expr (var);
1641 tmp = build_call_expr (function, 1, tmp);
1642 gfc_add_expr_to_block (&block, tmp);
1644 gfc_add_block_to_block (&block, &post_block);
1647 dt_post_end_block = &post_end_block;
1649 gfc_add_expr_to_block (&block, gfc_trans_code (code->block->next));
1651 gfc_add_block_to_block (&block, &post_iu_block);
1654 dt_post_end_block = NULL;
1656 return gfc_finish_block (&block);
1660 /* Translate the IOLENGTH form of an INQUIRE statement. We treat
1661 this as a third sort of data transfer statement, except that
1662 lengths are summed instead of actually transferring any data. */
1665 gfc_trans_iolength (gfc_code * code)
1668 return build_dt (iocall[IOCALL_IOLENGTH], code);
1672 /* Translate a READ statement. */
1675 gfc_trans_read (gfc_code * code)
1678 return build_dt (iocall[IOCALL_READ], code);
1682 /* Translate a WRITE statement */
1685 gfc_trans_write (gfc_code * code)
1688 return build_dt (iocall[IOCALL_WRITE], code);
1692 /* Finish a data transfer statement. */
1695 gfc_trans_dt_end (gfc_code * code)
1700 gfc_init_block (&block);
1705 function = iocall[IOCALL_READ_DONE];
1709 function = iocall[IOCALL_WRITE_DONE];
1713 function = iocall[IOCALL_IOLENGTH_DONE];
1720 tmp = build_fold_addr_expr (dt_parm);
1721 tmp = build_call_expr (function, 1, tmp);
1722 gfc_add_expr_to_block (&block, tmp);
1723 gfc_add_block_to_block (&block, dt_post_end_block);
1724 gfc_init_block (dt_post_end_block);
1726 if (last_dt != IOLENGTH)
1728 gcc_assert (code->ext.dt != NULL);
1729 io_result (&block, dt_parm, code->ext.dt->err,
1730 code->ext.dt->end, code->ext.dt->eor);
1733 return gfc_finish_block (&block);
1737 transfer_expr (gfc_se * se, gfc_typespec * ts, tree addr_expr, gfc_code * code);
1739 /* Given an array field in a derived type variable, generate the code
1740 for the loop that iterates over array elements, and the code that
1741 accesses those array elements. Use transfer_expr to generate code
1742 for transferring that element. Because elements may also be
1743 derived types, transfer_expr and transfer_array_component are mutually
1747 transfer_array_component (tree expr, gfc_component * cm)
1757 gfc_start_block (&block);
1758 gfc_init_se (&se, NULL);
1760 /* Create and initialize Scalarization Status. Unlike in
1761 gfc_trans_transfer, we can't simply use gfc_walk_expr to take
1762 care of this task, because we don't have a gfc_expr at hand.
1763 Build one manually, as in gfc_trans_subarray_assign. */
1766 ss->type = GFC_SS_COMPONENT;
1768 ss->shape = gfc_get_shape (cm->as->rank);
1769 ss->next = gfc_ss_terminator;
1770 ss->data.info.dimen = cm->as->rank;
1771 ss->data.info.descriptor = expr;
1772 ss->data.info.data = gfc_conv_array_data (expr);
1773 ss->data.info.offset = gfc_conv_array_offset (expr);
1774 for (n = 0; n < cm->as->rank; n++)
1776 ss->data.info.dim[n] = n;
1777 ss->data.info.start[n] = gfc_conv_array_lbound (expr, n);
1778 ss->data.info.stride[n] = gfc_index_one_node;
1780 mpz_init (ss->shape[n]);
1781 mpz_sub (ss->shape[n], cm->as->upper[n]->value.integer,
1782 cm->as->lower[n]->value.integer);
1783 mpz_add_ui (ss->shape[n], ss->shape[n], 1);
1786 /* Once we got ss, we use scalarizer to create the loop. */
1788 gfc_init_loopinfo (&loop);
1789 gfc_add_ss_to_loop (&loop, ss);
1790 gfc_conv_ss_startstride (&loop);
1791 gfc_conv_loop_setup (&loop);
1792 gfc_mark_ss_chain_used (ss, 1);
1793 gfc_start_scalarized_body (&loop, &body);
1795 gfc_copy_loopinfo_to_se (&se, &loop);
1798 /* gfc_conv_tmp_array_ref assumes that se.expr contains the array. */
1800 gfc_conv_tmp_array_ref (&se);
1802 /* Now se.expr contains an element of the array. Take the address and pass
1803 it to the IO routines. */
1804 tmp = build_fold_addr_expr (se.expr);
1805 transfer_expr (&se, &cm->ts, tmp, NULL);
1807 /* We are done now with the loop body. Wrap up the scalarizer and
1810 gfc_add_block_to_block (&body, &se.pre);
1811 gfc_add_block_to_block (&body, &se.post);
1813 gfc_trans_scalarizing_loops (&loop, &body);
1815 gfc_add_block_to_block (&block, &loop.pre);
1816 gfc_add_block_to_block (&block, &loop.post);
1818 for (n = 0; n < cm->as->rank; n++)
1819 mpz_clear (ss->shape[n]);
1820 gfc_free (ss->shape);
1822 gfc_cleanup_loop (&loop);
1824 return gfc_finish_block (&block);
1827 /* Generate the call for a scalar transfer node. */
1830 transfer_expr (gfc_se * se, gfc_typespec * ts, tree addr_expr, gfc_code * code)
1832 tree tmp, function, arg2, field, expr;
1836 /* It is possible to get a C_NULL_PTR or C_NULL_FUNPTR expression here if
1837 the user says something like: print *, 'c_null_ptr: ', c_null_ptr
1838 We need to translate the expression to a constant if it's either
1839 C_NULL_PTR or C_NULL_FUNPTR. We could also get a user variable of
1840 type C_PTR or C_FUNPTR, in which case the ts->type may no longer be
1841 BT_DERIVED (could have been changed by gfc_conv_expr). */
1842 if ((ts->type == BT_DERIVED && ts->is_iso_c == 1 && ts->derived != NULL)
1843 || (ts->derived != NULL && ts->derived->ts.is_iso_c == 1))
1845 /* C_PTR and C_FUNPTR have private components which means they can not
1846 be printed. However, if -std=gnu and not -pedantic, allow
1847 the component to be printed to help debugging. */
1848 if (gfc_notification_std (GFC_STD_GNU) != SILENT)
1850 gfc_error_now ("Derived type '%s' at %L has PRIVATE components",
1851 ts->derived->name, code != NULL ? &(code->loc) :
1852 &gfc_current_locus);
1856 ts->type = ts->derived->ts.type;
1857 ts->kind = ts->derived->ts.kind;
1858 ts->f90_type = ts->derived->ts.f90_type;
1868 arg2 = build_int_cst (NULL_TREE, kind);
1869 function = iocall[IOCALL_X_INTEGER];
1873 arg2 = build_int_cst (NULL_TREE, kind);
1874 function = iocall[IOCALL_X_REAL];
1878 arg2 = build_int_cst (NULL_TREE, kind);
1879 function = iocall[IOCALL_X_COMPLEX];
1883 arg2 = build_int_cst (NULL_TREE, kind);
1884 function = iocall[IOCALL_X_LOGICAL];
1889 if (se->string_length)
1890 arg2 = se->string_length;
1893 tmp = build_fold_indirect_ref (addr_expr);
1894 gcc_assert (TREE_CODE (TREE_TYPE (tmp)) == ARRAY_TYPE);
1895 arg2 = TYPE_MAX_VALUE (TYPE_DOMAIN (TREE_TYPE (tmp)));
1897 function = iocall[IOCALL_X_CHARACTER];
1901 /* Recurse into the elements of the derived type. */
1902 expr = gfc_evaluate_now (addr_expr, &se->pre);
1903 expr = build_fold_indirect_ref (expr);
1905 for (c = ts->derived->components; c; c = c->next)
1907 field = c->backend_decl;
1908 gcc_assert (field && TREE_CODE (field) == FIELD_DECL);
1910 tmp = fold_build3 (COMPONENT_REF, TREE_TYPE (field),
1911 expr, field, NULL_TREE);
1915 tmp = transfer_array_component (tmp, c);
1916 gfc_add_expr_to_block (&se->pre, tmp);
1921 tmp = build_fold_addr_expr (tmp);
1922 transfer_expr (se, &c->ts, tmp, code);
1928 internal_error ("Bad IO basetype (%d)", ts->type);
1931 tmp = build_fold_addr_expr (dt_parm);
1932 tmp = build_call_expr (function, 3, tmp, addr_expr, arg2);
1933 gfc_add_expr_to_block (&se->pre, tmp);
1934 gfc_add_block_to_block (&se->pre, &se->post);
1939 /* Generate a call to pass an array descriptor to the IO library. The
1940 array should be of one of the intrinsic types. */
1943 transfer_array_desc (gfc_se * se, gfc_typespec * ts, tree addr_expr)
1945 tree tmp, charlen_arg, kind_arg;
1947 if (ts->type == BT_CHARACTER)
1948 charlen_arg = se->string_length;
1950 charlen_arg = build_int_cst (NULL_TREE, 0);
1952 kind_arg = build_int_cst (NULL_TREE, ts->kind);
1954 tmp = build_fold_addr_expr (dt_parm);
1955 tmp = build_call_expr (iocall[IOCALL_X_ARRAY], 4,
1956 tmp, addr_expr, kind_arg, charlen_arg);
1957 gfc_add_expr_to_block (&se->pre, tmp);
1958 gfc_add_block_to_block (&se->pre, &se->post);
1962 /* gfc_trans_transfer()-- Translate a TRANSFER code node */
1965 gfc_trans_transfer (gfc_code * code)
1967 stmtblock_t block, body;
1976 gfc_start_block (&block);
1977 gfc_init_block (&body);
1980 ss = gfc_walk_expr (expr);
1983 gfc_init_se (&se, NULL);
1985 if (ss == gfc_ss_terminator)
1987 /* Transfer a scalar value. */
1988 gfc_conv_expr_reference (&se, expr);
1989 transfer_expr (&se, &expr->ts, se.expr, code);
1993 /* Transfer an array. If it is an array of an intrinsic
1994 type, pass the descriptor to the library. Otherwise
1995 scalarize the transfer. */
1998 for (ref = expr->ref; ref && ref->type != REF_ARRAY;
2000 gcc_assert (ref->type == REF_ARRAY);
2003 if (expr->ts.type != BT_DERIVED
2004 && ref && ref->next == NULL
2005 && !is_subref_array (expr))
2007 bool seen_vector = false;
2009 if (ref && ref->u.ar.type == AR_SECTION)
2011 for (n = 0; n < ref->u.ar.dimen; n++)
2012 if (ref->u.ar.dimen_type[n] == DIMEN_VECTOR)
2016 if (seen_vector && last_dt == READ)
2018 /* Create a temp, read to that and copy it back. */
2019 gfc_conv_subref_array_arg (&se, expr, 0, INTENT_OUT);
2024 /* Get the descriptor. */
2025 gfc_conv_expr_descriptor (&se, expr, ss);
2026 tmp = build_fold_addr_expr (se.expr);
2029 transfer_array_desc (&se, &expr->ts, tmp);
2030 goto finish_block_label;
2033 /* Initialize the scalarizer. */
2034 gfc_init_loopinfo (&loop);
2035 gfc_add_ss_to_loop (&loop, ss);
2037 /* Initialize the loop. */
2038 gfc_conv_ss_startstride (&loop);
2039 gfc_conv_loop_setup (&loop);
2041 /* The main loop body. */
2042 gfc_mark_ss_chain_used (ss, 1);
2043 gfc_start_scalarized_body (&loop, &body);
2045 gfc_copy_loopinfo_to_se (&se, &loop);
2048 gfc_conv_expr_reference (&se, expr);
2049 transfer_expr (&se, &expr->ts, se.expr, code);
2054 gfc_add_block_to_block (&body, &se.pre);
2055 gfc_add_block_to_block (&body, &se.post);
2058 tmp = gfc_finish_block (&body);
2061 gcc_assert (se.ss == gfc_ss_terminator);
2062 gfc_trans_scalarizing_loops (&loop, &body);
2064 gfc_add_block_to_block (&loop.pre, &loop.post);
2065 tmp = gfc_finish_block (&loop.pre);
2066 gfc_cleanup_loop (&loop);
2069 gfc_add_expr_to_block (&block, tmp);
2071 return gfc_finish_block (&block);
2074 #include "gt-fortran-trans-io.h"