1 /* Backend support for Fortran 95 basic types and derived types.
2 Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
4 Free Software Foundation, Inc.
5 Contributed by Paul Brook <paul@nowt.org>
6 and Steven Bosscher <s.bosscher@student.tudelft.nl>
8 This file is part of GCC.
10 GCC is free software; you can redistribute it and/or modify it under
11 the terms of the GNU General Public License as published by the Free
12 Software Foundation; either version 3, or (at your option) any later
15 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
16 WARRANTY; without even the implied warranty of MERCHANTABILITY or
17 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
20 You should have received a copy of the GNU General Public License
21 along with GCC; see the file COPYING3. If not see
22 <http://www.gnu.org/licenses/>. */
24 /* trans-types.c -- gfortran backend types */
28 #include "coretypes.h"
29 #include "tm.h" /* For INTMAX_TYPE, INT8_TYPE, INT16_TYPE, INT32_TYPE,
30 INT64_TYPE, INT_LEAST8_TYPE, INT_LEAST16_TYPE,
31 INT_LEAST32_TYPE, INT_LEAST64_TYPE, INT_FAST8_TYPE,
32 INT_FAST16_TYPE, INT_FAST32_TYPE, INT_FAST64_TYPE,
33 BOOL_TYPE_SIZE, BITS_PER_UNIT, POINTER_SIZE,
34 INT_TYPE_SIZE, CHAR_TYPE_SIZE, SHORT_TYPE_SIZE,
35 LONG_TYPE_SIZE, LONG_LONG_TYPE_SIZE,
36 FLOAT_TYPE_SIZE, DOUBLE_TYPE_SIZE,
37 LONG_DOUBLE_TYPE_SIZE and LIBGCC2_HAS_TF_MODE. */
39 #include "langhooks.h" /* For iso-c-bindings.def. */
42 #include "diagnostic-core.h" /* For fatal_error. */
43 #include "toplev.h" /* For rest_of_decl_compilation. */
46 #include "trans-types.h"
47 #include "trans-const.h"
49 #include "dwarf2out.h" /* For struct array_descr_info. */
52 #if (GFC_MAX_DIMENSIONS < 10)
53 #define GFC_RANK_DIGITS 1
54 #define GFC_RANK_PRINTF_FORMAT "%01d"
55 #elif (GFC_MAX_DIMENSIONS < 100)
56 #define GFC_RANK_DIGITS 2
57 #define GFC_RANK_PRINTF_FORMAT "%02d"
59 #error If you really need >99 dimensions, continue the sequence above...
62 /* array of structs so we don't have to worry about xmalloc or free */
63 CInteropKind_t c_interop_kinds_table[ISOCBINDING_NUMBER];
65 tree gfc_array_index_type;
66 tree gfc_array_range_type;
67 tree gfc_character1_type_node;
69 tree prvoid_type_node;
70 tree ppvoid_type_node;
74 tree gfc_charlen_type_node;
76 tree float128_type_node = NULL_TREE;
77 tree complex_float128_type_node = NULL_TREE;
79 bool gfc_real16_is_float128 = false;
81 static GTY(()) tree gfc_desc_dim_type;
82 static GTY(()) tree gfc_max_array_element_size;
83 static GTY(()) tree gfc_array_descriptor_base[2 * GFC_MAX_DIMENSIONS];
84 static GTY(()) tree gfc_array_descriptor_base_caf[2 * GFC_MAX_DIMENSIONS];
86 /* Arrays for all integral and real kinds. We'll fill this in at runtime
87 after the target has a chance to process command-line options. */
89 #define MAX_INT_KINDS 5
90 gfc_integer_info gfc_integer_kinds[MAX_INT_KINDS + 1];
91 gfc_logical_info gfc_logical_kinds[MAX_INT_KINDS + 1];
92 static GTY(()) tree gfc_integer_types[MAX_INT_KINDS + 1];
93 static GTY(()) tree gfc_logical_types[MAX_INT_KINDS + 1];
95 #define MAX_REAL_KINDS 5
96 gfc_real_info gfc_real_kinds[MAX_REAL_KINDS + 1];
97 static GTY(()) tree gfc_real_types[MAX_REAL_KINDS + 1];
98 static GTY(()) tree gfc_complex_types[MAX_REAL_KINDS + 1];
100 #define MAX_CHARACTER_KINDS 2
101 gfc_character_info gfc_character_kinds[MAX_CHARACTER_KINDS + 1];
102 static GTY(()) tree gfc_character_types[MAX_CHARACTER_KINDS + 1];
103 static GTY(()) tree gfc_pcharacter_types[MAX_CHARACTER_KINDS + 1];
105 static tree gfc_add_field_to_struct_1 (tree, tree, tree, tree **);
107 /* The integer kind to use for array indices. This will be set to the
108 proper value based on target information from the backend. */
110 int gfc_index_integer_kind;
112 /* The default kinds of the various types. */
114 int gfc_default_integer_kind;
115 int gfc_max_integer_kind;
116 int gfc_default_real_kind;
117 int gfc_default_double_kind;
118 int gfc_default_character_kind;
119 int gfc_default_logical_kind;
120 int gfc_default_complex_kind;
122 int gfc_atomic_int_kind;
123 int gfc_atomic_logical_kind;
125 /* The kind size used for record offsets. If the target system supports
126 kind=8, this will be set to 8, otherwise it is set to 4. */
129 /* The integer kind used to store character lengths. */
130 int gfc_charlen_int_kind;
132 /* The size of the numeric storage unit and character storage unit. */
133 int gfc_numeric_storage_size;
134 int gfc_character_storage_size;
138 gfc_check_any_c_kind (gfc_typespec *ts)
142 for (i = 0; i < ISOCBINDING_NUMBER; i++)
144 /* Check for any C interoperable kind for the given type/kind in ts.
145 This can be used after verify_c_interop to make sure that the
146 Fortran kind being used exists in at least some form for C. */
147 if (c_interop_kinds_table[i].f90_type == ts->type &&
148 c_interop_kinds_table[i].value == ts->kind)
157 get_real_kind_from_node (tree type)
161 for (i = 0; gfc_real_kinds[i].kind != 0; i++)
162 if (gfc_real_kinds[i].mode_precision == TYPE_PRECISION (type))
163 return gfc_real_kinds[i].kind;
169 get_int_kind_from_node (tree type)
176 for (i = 0; gfc_integer_kinds[i].kind != 0; i++)
177 if (gfc_integer_kinds[i].bit_size == TYPE_PRECISION (type))
178 return gfc_integer_kinds[i].kind;
183 /* Return a typenode for the "standard" C type with a given name. */
185 get_typenode_from_name (const char *name)
187 if (name == NULL || *name == '\0')
190 if (strcmp (name, "char") == 0)
191 return char_type_node;
192 if (strcmp (name, "unsigned char") == 0)
193 return unsigned_char_type_node;
194 if (strcmp (name, "signed char") == 0)
195 return signed_char_type_node;
197 if (strcmp (name, "short int") == 0)
198 return short_integer_type_node;
199 if (strcmp (name, "short unsigned int") == 0)
200 return short_unsigned_type_node;
202 if (strcmp (name, "int") == 0)
203 return integer_type_node;
204 if (strcmp (name, "unsigned int") == 0)
205 return unsigned_type_node;
207 if (strcmp (name, "long int") == 0)
208 return long_integer_type_node;
209 if (strcmp (name, "long unsigned int") == 0)
210 return long_unsigned_type_node;
212 if (strcmp (name, "long long int") == 0)
213 return long_long_integer_type_node;
214 if (strcmp (name, "long long unsigned int") == 0)
215 return long_long_unsigned_type_node;
221 get_int_kind_from_name (const char *name)
223 return get_int_kind_from_node (get_typenode_from_name (name));
227 /* Get the kind number corresponding to an integer of given size,
228 following the required return values for ISO_FORTRAN_ENV INT* constants:
229 -2 is returned if we support a kind of larger size, -1 otherwise. */
231 gfc_get_int_kind_from_width_isofortranenv (int size)
235 /* Look for a kind with matching storage size. */
236 for (i = 0; gfc_integer_kinds[i].kind != 0; i++)
237 if (gfc_integer_kinds[i].bit_size == size)
238 return gfc_integer_kinds[i].kind;
240 /* Look for a kind with larger storage size. */
241 for (i = 0; gfc_integer_kinds[i].kind != 0; i++)
242 if (gfc_integer_kinds[i].bit_size > size)
248 /* Get the kind number corresponding to a real of given storage size,
249 following the required return values for ISO_FORTRAN_ENV REAL* constants:
250 -2 is returned if we support a kind of larger size, -1 otherwise. */
252 gfc_get_real_kind_from_width_isofortranenv (int size)
258 /* Look for a kind with matching storage size. */
259 for (i = 0; gfc_real_kinds[i].kind != 0; i++)
260 if (int_size_in_bytes (gfc_get_real_type (gfc_real_kinds[i].kind)) == size)
261 return gfc_real_kinds[i].kind;
263 /* Look for a kind with larger storage size. */
264 for (i = 0; gfc_real_kinds[i].kind != 0; i++)
265 if (int_size_in_bytes (gfc_get_real_type (gfc_real_kinds[i].kind)) > size)
274 get_int_kind_from_width (int size)
278 for (i = 0; gfc_integer_kinds[i].kind != 0; i++)
279 if (gfc_integer_kinds[i].bit_size == size)
280 return gfc_integer_kinds[i].kind;
286 get_int_kind_from_minimal_width (int size)
290 for (i = 0; gfc_integer_kinds[i].kind != 0; i++)
291 if (gfc_integer_kinds[i].bit_size >= size)
292 return gfc_integer_kinds[i].kind;
298 /* Generate the CInteropKind_t objects for the C interoperable
302 gfc_init_c_interop_kinds (void)
306 /* init all pointers in the list to NULL */
307 for (i = 0; i < ISOCBINDING_NUMBER; i++)
309 /* Initialize the name and value fields. */
310 c_interop_kinds_table[i].name[0] = '\0';
311 c_interop_kinds_table[i].value = -100;
312 c_interop_kinds_table[i].f90_type = BT_UNKNOWN;
315 #define NAMED_INTCST(a,b,c,d) \
316 strncpy (c_interop_kinds_table[a].name, b, strlen(b) + 1); \
317 c_interop_kinds_table[a].f90_type = BT_INTEGER; \
318 c_interop_kinds_table[a].value = c;
319 #define NAMED_REALCST(a,b,c,d) \
320 strncpy (c_interop_kinds_table[a].name, b, strlen(b) + 1); \
321 c_interop_kinds_table[a].f90_type = BT_REAL; \
322 c_interop_kinds_table[a].value = c;
323 #define NAMED_CMPXCST(a,b,c,d) \
324 strncpy (c_interop_kinds_table[a].name, b, strlen(b) + 1); \
325 c_interop_kinds_table[a].f90_type = BT_COMPLEX; \
326 c_interop_kinds_table[a].value = c;
327 #define NAMED_LOGCST(a,b,c) \
328 strncpy (c_interop_kinds_table[a].name, b, strlen(b) + 1); \
329 c_interop_kinds_table[a].f90_type = BT_LOGICAL; \
330 c_interop_kinds_table[a].value = c;
331 #define NAMED_CHARKNDCST(a,b,c) \
332 strncpy (c_interop_kinds_table[a].name, b, strlen(b) + 1); \
333 c_interop_kinds_table[a].f90_type = BT_CHARACTER; \
334 c_interop_kinds_table[a].value = c;
335 #define NAMED_CHARCST(a,b,c) \
336 strncpy (c_interop_kinds_table[a].name, b, strlen(b) + 1); \
337 c_interop_kinds_table[a].f90_type = BT_CHARACTER; \
338 c_interop_kinds_table[a].value = c;
339 #define DERIVED_TYPE(a,b,c) \
340 strncpy (c_interop_kinds_table[a].name, b, strlen(b) + 1); \
341 c_interop_kinds_table[a].f90_type = BT_DERIVED; \
342 c_interop_kinds_table[a].value = c;
343 #define PROCEDURE(a,b) \
344 strncpy (c_interop_kinds_table[a].name, b, strlen(b) + 1); \
345 c_interop_kinds_table[a].f90_type = BT_PROCEDURE; \
346 c_interop_kinds_table[a].value = 0;
347 #include "iso-c-binding.def"
348 #define NAMED_FUNCTION(a,b,c,d) \
349 strncpy (c_interop_kinds_table[a].name, b, strlen(b) + 1); \
350 c_interop_kinds_table[a].f90_type = BT_PROCEDURE; \
351 c_interop_kinds_table[a].value = c;
352 #include "iso-c-binding.def"
356 /* Query the target to determine which machine modes are available for
357 computation. Choose KIND numbers for them. */
360 gfc_init_kinds (void)
363 int i_index, r_index, kind;
364 bool saw_i4 = false, saw_i8 = false;
365 bool saw_r4 = false, saw_r8 = false, saw_r16 = false;
367 for (i_index = 0, mode = MIN_MODE_INT; mode <= MAX_MODE_INT; mode++)
371 if (!targetm.scalar_mode_supported_p ((enum machine_mode) mode))
374 /* The middle end doesn't support constants larger than 2*HWI.
375 Perhaps the target hook shouldn't have accepted these either,
376 but just to be safe... */
377 bitsize = GET_MODE_BITSIZE (mode);
378 if (bitsize > 2*HOST_BITS_PER_WIDE_INT)
381 gcc_assert (i_index != MAX_INT_KINDS);
383 /* Let the kind equal the bit size divided by 8. This insulates the
384 programmer from the underlying byte size. */
392 gfc_integer_kinds[i_index].kind = kind;
393 gfc_integer_kinds[i_index].radix = 2;
394 gfc_integer_kinds[i_index].digits = bitsize - 1;
395 gfc_integer_kinds[i_index].bit_size = bitsize;
397 gfc_logical_kinds[i_index].kind = kind;
398 gfc_logical_kinds[i_index].bit_size = bitsize;
403 /* Set the kind used to match GFC_INT_IO in libgfortran. This is
404 used for large file access. */
411 /* If we do not at least have kind = 4, everything is pointless. */
414 /* Set the maximum integer kind. Used with at least BOZ constants. */
415 gfc_max_integer_kind = gfc_integer_kinds[i_index - 1].kind;
417 for (r_index = 0, mode = MIN_MODE_FLOAT; mode <= MAX_MODE_FLOAT; mode++)
419 const struct real_format *fmt =
420 REAL_MODE_FORMAT ((enum machine_mode) mode);
425 if (!targetm.scalar_mode_supported_p ((enum machine_mode) mode))
428 /* Only let float, double, long double and __float128 go through.
429 Runtime support for others is not provided, so they would be
431 if (mode != TYPE_MODE (float_type_node)
432 && (mode != TYPE_MODE (double_type_node))
433 && (mode != TYPE_MODE (long_double_type_node))
434 #if defined(LIBGCC2_HAS_TF_MODE) && defined(ENABLE_LIBQUADMATH_SUPPORT)
440 /* Let the kind equal the precision divided by 8, rounding up. Again,
441 this insulates the programmer from the underlying byte size.
443 Also, it effectively deals with IEEE extended formats. There, the
444 total size of the type may equal 16, but it's got 6 bytes of padding
445 and the increased size can get in the way of a real IEEE quad format
446 which may also be supported by the target.
448 We round up so as to handle IA-64 __floatreg (RFmode), which is an
449 82 bit type. Not to be confused with __float80 (XFmode), which is
450 an 80 bit type also supported by IA-64. So XFmode should come out
451 to be kind=10, and RFmode should come out to be kind=11. Egads. */
453 kind = (GET_MODE_PRECISION (mode) + 7) / 8;
462 /* Careful we don't stumble a weird internal mode. */
463 gcc_assert (r_index <= 0 || gfc_real_kinds[r_index-1].kind != kind);
464 /* Or have too many modes for the allocated space. */
465 gcc_assert (r_index != MAX_REAL_KINDS);
467 gfc_real_kinds[r_index].kind = kind;
468 gfc_real_kinds[r_index].radix = fmt->b;
469 gfc_real_kinds[r_index].digits = fmt->p;
470 gfc_real_kinds[r_index].min_exponent = fmt->emin;
471 gfc_real_kinds[r_index].max_exponent = fmt->emax;
472 if (fmt->pnan < fmt->p)
473 /* This is an IBM extended double format (or the MIPS variant)
474 made up of two IEEE doubles. The value of the long double is
475 the sum of the values of the two parts. The most significant
476 part is required to be the value of the long double rounded
477 to the nearest double. If we use emax of 1024 then we can't
478 represent huge(x) = (1 - b**(-p)) * b**(emax-1) * b, because
479 rounding will make the most significant part overflow. */
480 gfc_real_kinds[r_index].max_exponent = fmt->emax - 1;
481 gfc_real_kinds[r_index].mode_precision = GET_MODE_PRECISION (mode);
485 /* Choose the default integer kind. We choose 4 unless the user
486 directs us otherwise. */
487 if (gfc_option.flag_default_integer)
490 fatal_error ("integer kind=8 not available for -fdefault-integer-8 option");
491 gfc_default_integer_kind = 8;
493 /* Even if the user specified that the default integer kind be 8,
494 the numeric storage size isn't 64. In this case, a warning will
495 be issued when NUMERIC_STORAGE_SIZE is used. */
496 gfc_numeric_storage_size = 4 * 8;
500 gfc_default_integer_kind = 4;
501 gfc_numeric_storage_size = 4 * 8;
505 gfc_default_integer_kind = gfc_integer_kinds[i_index - 1].kind;
506 gfc_numeric_storage_size = gfc_integer_kinds[i_index - 1].bit_size;
509 /* Choose the default real kind. Again, we choose 4 when possible. */
510 if (gfc_option.flag_default_real)
513 fatal_error ("real kind=8 not available for -fdefault-real-8 option");
514 gfc_default_real_kind = 8;
517 gfc_default_real_kind = 4;
519 gfc_default_real_kind = gfc_real_kinds[0].kind;
521 /* Choose the default double kind. If -fdefault-real and -fdefault-double
522 are specified, we use kind=8, if it's available. If -fdefault-real is
523 specified without -fdefault-double, we use kind=16, if it's available.
524 Otherwise we do not change anything. */
525 if (gfc_option.flag_default_double && !gfc_option.flag_default_real)
526 fatal_error ("Use of -fdefault-double-8 requires -fdefault-real-8");
528 if (gfc_option.flag_default_real && gfc_option.flag_default_double && saw_r8)
529 gfc_default_double_kind = 8;
530 else if (gfc_option.flag_default_real && saw_r16)
531 gfc_default_double_kind = 16;
532 else if (saw_r4 && saw_r8)
533 gfc_default_double_kind = 8;
536 /* F95 14.6.3.1: A nonpointer scalar object of type double precision
537 real ... occupies two contiguous numeric storage units.
539 Therefore we must be supplied a kind twice as large as we chose
540 for single precision. There are loopholes, in that double
541 precision must *occupy* two storage units, though it doesn't have
542 to *use* two storage units. Which means that you can make this
543 kind artificially wide by padding it. But at present there are
544 no GCC targets for which a two-word type does not exist, so we
545 just let gfc_validate_kind abort and tell us if something breaks. */
547 gfc_default_double_kind
548 = gfc_validate_kind (BT_REAL, gfc_default_real_kind * 2, false);
551 /* The default logical kind is constrained to be the same as the
552 default integer kind. Similarly with complex and real. */
553 gfc_default_logical_kind = gfc_default_integer_kind;
554 gfc_default_complex_kind = gfc_default_real_kind;
556 /* We only have two character kinds: ASCII and UCS-4.
557 ASCII corresponds to a 8-bit integer type, if one is available.
558 UCS-4 corresponds to a 32-bit integer type, if one is available. */
560 if ((kind = get_int_kind_from_width (8)) > 0)
562 gfc_character_kinds[i_index].kind = kind;
563 gfc_character_kinds[i_index].bit_size = 8;
564 gfc_character_kinds[i_index].name = "ascii";
567 if ((kind = get_int_kind_from_width (32)) > 0)
569 gfc_character_kinds[i_index].kind = kind;
570 gfc_character_kinds[i_index].bit_size = 32;
571 gfc_character_kinds[i_index].name = "iso_10646";
575 /* Choose the smallest integer kind for our default character. */
576 gfc_default_character_kind = gfc_character_kinds[0].kind;
577 gfc_character_storage_size = gfc_default_character_kind * 8;
579 /* Choose the integer kind the same size as "void*" for our index kind. */
580 gfc_index_integer_kind = POINTER_SIZE / 8;
581 /* Pick a kind the same size as the C "int" type. */
582 gfc_c_int_kind = INT_TYPE_SIZE / 8;
584 /* Choose atomic kinds to match C's int. */
585 gfc_atomic_int_kind = gfc_c_int_kind;
586 gfc_atomic_logical_kind = gfc_c_int_kind;
590 /* Make sure that a valid kind is present. Returns an index into the
591 associated kinds array, -1 if the kind is not present. */
594 validate_integer (int kind)
598 for (i = 0; gfc_integer_kinds[i].kind != 0; i++)
599 if (gfc_integer_kinds[i].kind == kind)
606 validate_real (int kind)
610 for (i = 0; gfc_real_kinds[i].kind != 0; i++)
611 if (gfc_real_kinds[i].kind == kind)
618 validate_logical (int kind)
622 for (i = 0; gfc_logical_kinds[i].kind; i++)
623 if (gfc_logical_kinds[i].kind == kind)
630 validate_character (int kind)
634 for (i = 0; gfc_character_kinds[i].kind; i++)
635 if (gfc_character_kinds[i].kind == kind)
641 /* Validate a kind given a basic type. The return value is the same
642 for the child functions, with -1 indicating nonexistence of the
643 type. If MAY_FAIL is false, then -1 is never returned, and we ICE. */
646 gfc_validate_kind (bt type, int kind, bool may_fail)
652 case BT_REAL: /* Fall through */
654 rc = validate_real (kind);
657 rc = validate_integer (kind);
660 rc = validate_logical (kind);
663 rc = validate_character (kind);
667 gfc_internal_error ("gfc_validate_kind(): Got bad type");
670 if (rc < 0 && !may_fail)
671 gfc_internal_error ("gfc_validate_kind(): Got bad kind");
677 /* Four subroutines of gfc_init_types. Create type nodes for the given kind.
678 Reuse common type nodes where possible. Recognize if the kind matches up
679 with a C type. This will be used later in determining which routines may
680 be scarfed from libm. */
683 gfc_build_int_type (gfc_integer_info *info)
685 int mode_precision = info->bit_size;
687 if (mode_precision == CHAR_TYPE_SIZE)
689 if (mode_precision == SHORT_TYPE_SIZE)
691 if (mode_precision == INT_TYPE_SIZE)
693 if (mode_precision == LONG_TYPE_SIZE)
695 if (mode_precision == LONG_LONG_TYPE_SIZE)
696 info->c_long_long = 1;
698 if (TYPE_PRECISION (intQI_type_node) == mode_precision)
699 return intQI_type_node;
700 if (TYPE_PRECISION (intHI_type_node) == mode_precision)
701 return intHI_type_node;
702 if (TYPE_PRECISION (intSI_type_node) == mode_precision)
703 return intSI_type_node;
704 if (TYPE_PRECISION (intDI_type_node) == mode_precision)
705 return intDI_type_node;
706 if (TYPE_PRECISION (intTI_type_node) == mode_precision)
707 return intTI_type_node;
709 return make_signed_type (mode_precision);
713 gfc_build_uint_type (int size)
715 if (size == CHAR_TYPE_SIZE)
716 return unsigned_char_type_node;
717 if (size == SHORT_TYPE_SIZE)
718 return short_unsigned_type_node;
719 if (size == INT_TYPE_SIZE)
720 return unsigned_type_node;
721 if (size == LONG_TYPE_SIZE)
722 return long_unsigned_type_node;
723 if (size == LONG_LONG_TYPE_SIZE)
724 return long_long_unsigned_type_node;
726 return make_unsigned_type (size);
731 gfc_build_real_type (gfc_real_info *info)
733 int mode_precision = info->mode_precision;
736 if (mode_precision == FLOAT_TYPE_SIZE)
738 if (mode_precision == DOUBLE_TYPE_SIZE)
740 if (mode_precision == LONG_DOUBLE_TYPE_SIZE)
741 info->c_long_double = 1;
742 if (mode_precision != LONG_DOUBLE_TYPE_SIZE && mode_precision == 128)
744 info->c_float128 = 1;
745 gfc_real16_is_float128 = true;
748 if (TYPE_PRECISION (float_type_node) == mode_precision)
749 return float_type_node;
750 if (TYPE_PRECISION (double_type_node) == mode_precision)
751 return double_type_node;
752 if (TYPE_PRECISION (long_double_type_node) == mode_precision)
753 return long_double_type_node;
755 new_type = make_node (REAL_TYPE);
756 TYPE_PRECISION (new_type) = mode_precision;
757 layout_type (new_type);
762 gfc_build_complex_type (tree scalar_type)
766 if (scalar_type == NULL)
768 if (scalar_type == float_type_node)
769 return complex_float_type_node;
770 if (scalar_type == double_type_node)
771 return complex_double_type_node;
772 if (scalar_type == long_double_type_node)
773 return complex_long_double_type_node;
775 new_type = make_node (COMPLEX_TYPE);
776 TREE_TYPE (new_type) = scalar_type;
777 layout_type (new_type);
782 gfc_build_logical_type (gfc_logical_info *info)
784 int bit_size = info->bit_size;
787 if (bit_size == BOOL_TYPE_SIZE)
790 return boolean_type_node;
793 new_type = make_unsigned_type (bit_size);
794 TREE_SET_CODE (new_type, BOOLEAN_TYPE);
795 TYPE_MAX_VALUE (new_type) = build_int_cst (new_type, 1);
796 TYPE_PRECISION (new_type) = 1;
802 /* Create the backend type nodes. We map them to their
803 equivalent C type, at least for now. We also give
804 names to the types here, and we push them in the
805 global binding level context.*/
808 gfc_init_types (void)
814 unsigned HOST_WIDE_INT hi;
815 unsigned HOST_WIDE_INT lo;
817 /* Create and name the types. */
818 #define PUSH_TYPE(name, node) \
819 pushdecl (build_decl (input_location, \
820 TYPE_DECL, get_identifier (name), node))
822 for (index = 0; gfc_integer_kinds[index].kind != 0; ++index)
824 type = gfc_build_int_type (&gfc_integer_kinds[index]);
825 /* Ensure integer(kind=1) doesn't have TYPE_STRING_FLAG set. */
826 if (TYPE_STRING_FLAG (type))
827 type = make_signed_type (gfc_integer_kinds[index].bit_size);
828 gfc_integer_types[index] = type;
829 snprintf (name_buf, sizeof(name_buf), "integer(kind=%d)",
830 gfc_integer_kinds[index].kind);
831 PUSH_TYPE (name_buf, type);
834 for (index = 0; gfc_logical_kinds[index].kind != 0; ++index)
836 type = gfc_build_logical_type (&gfc_logical_kinds[index]);
837 gfc_logical_types[index] = type;
838 snprintf (name_buf, sizeof(name_buf), "logical(kind=%d)",
839 gfc_logical_kinds[index].kind);
840 PUSH_TYPE (name_buf, type);
843 for (index = 0; gfc_real_kinds[index].kind != 0; index++)
845 type = gfc_build_real_type (&gfc_real_kinds[index]);
846 gfc_real_types[index] = type;
847 snprintf (name_buf, sizeof(name_buf), "real(kind=%d)",
848 gfc_real_kinds[index].kind);
849 PUSH_TYPE (name_buf, type);
851 if (gfc_real_kinds[index].c_float128)
852 float128_type_node = type;
854 type = gfc_build_complex_type (type);
855 gfc_complex_types[index] = type;
856 snprintf (name_buf, sizeof(name_buf), "complex(kind=%d)",
857 gfc_real_kinds[index].kind);
858 PUSH_TYPE (name_buf, type);
860 if (gfc_real_kinds[index].c_float128)
861 complex_float128_type_node = type;
864 for (index = 0; gfc_character_kinds[index].kind != 0; ++index)
866 type = gfc_build_uint_type (gfc_character_kinds[index].bit_size);
867 type = build_qualified_type (type, TYPE_UNQUALIFIED);
868 snprintf (name_buf, sizeof(name_buf), "character(kind=%d)",
869 gfc_character_kinds[index].kind);
870 PUSH_TYPE (name_buf, type);
871 gfc_character_types[index] = type;
872 gfc_pcharacter_types[index] = build_pointer_type (type);
874 gfc_character1_type_node = gfc_character_types[0];
876 PUSH_TYPE ("byte", unsigned_char_type_node);
877 PUSH_TYPE ("void", void_type_node);
879 /* DBX debugging output gets upset if these aren't set. */
880 if (!TYPE_NAME (integer_type_node))
881 PUSH_TYPE ("c_integer", integer_type_node);
882 if (!TYPE_NAME (char_type_node))
883 PUSH_TYPE ("c_char", char_type_node);
887 pvoid_type_node = build_pointer_type (void_type_node);
888 prvoid_type_node = build_qualified_type (pvoid_type_node, TYPE_QUAL_RESTRICT);
889 ppvoid_type_node = build_pointer_type (pvoid_type_node);
890 pchar_type_node = build_pointer_type (gfc_character1_type_node);
892 = build_pointer_type (build_function_type_list (void_type_node, NULL_TREE));
894 gfc_array_index_type = gfc_get_int_type (gfc_index_integer_kind);
895 /* We cannot use gfc_index_zero_node in definition of gfc_array_range_type,
896 since this function is called before gfc_init_constants. */
898 = build_range_type (gfc_array_index_type,
899 build_int_cst (gfc_array_index_type, 0),
902 /* The maximum array element size that can be handled is determined
903 by the number of bits available to store this field in the array
906 n = TYPE_PRECISION (gfc_array_index_type) - GFC_DTYPE_SIZE_SHIFT;
907 lo = ~ (unsigned HOST_WIDE_INT) 0;
908 if (n > HOST_BITS_PER_WIDE_INT)
909 hi = lo >> (2*HOST_BITS_PER_WIDE_INT - n);
911 hi = 0, lo >>= HOST_BITS_PER_WIDE_INT - n;
912 gfc_max_array_element_size
913 = build_int_cst_wide (long_unsigned_type_node, lo, hi);
915 boolean_type_node = gfc_get_logical_type (gfc_default_logical_kind);
916 boolean_true_node = build_int_cst (boolean_type_node, 1);
917 boolean_false_node = build_int_cst (boolean_type_node, 0);
919 /* ??? Shouldn't this be based on gfc_index_integer_kind or so? */
920 gfc_charlen_int_kind = 4;
921 gfc_charlen_type_node = gfc_get_int_type (gfc_charlen_int_kind);
924 /* Get the type node for the given type and kind. */
927 gfc_get_int_type (int kind)
929 int index = gfc_validate_kind (BT_INTEGER, kind, true);
930 return index < 0 ? 0 : gfc_integer_types[index];
934 gfc_get_real_type (int kind)
936 int index = gfc_validate_kind (BT_REAL, kind, true);
937 return index < 0 ? 0 : gfc_real_types[index];
941 gfc_get_complex_type (int kind)
943 int index = gfc_validate_kind (BT_COMPLEX, kind, true);
944 return index < 0 ? 0 : gfc_complex_types[index];
948 gfc_get_logical_type (int kind)
950 int index = gfc_validate_kind (BT_LOGICAL, kind, true);
951 return index < 0 ? 0 : gfc_logical_types[index];
955 gfc_get_char_type (int kind)
957 int index = gfc_validate_kind (BT_CHARACTER, kind, true);
958 return index < 0 ? 0 : gfc_character_types[index];
962 gfc_get_pchar_type (int kind)
964 int index = gfc_validate_kind (BT_CHARACTER, kind, true);
965 return index < 0 ? 0 : gfc_pcharacter_types[index];
969 /* Create a character type with the given kind and length. */
972 gfc_get_character_type_len_for_eltype (tree eltype, tree len)
976 bounds = build_range_type (gfc_charlen_type_node, gfc_index_one_node, len);
977 type = build_array_type (eltype, bounds);
978 TYPE_STRING_FLAG (type) = 1;
984 gfc_get_character_type_len (int kind, tree len)
986 gfc_validate_kind (BT_CHARACTER, kind, false);
987 return gfc_get_character_type_len_for_eltype (gfc_get_char_type (kind), len);
991 /* Get a type node for a character kind. */
994 gfc_get_character_type (int kind, gfc_charlen * cl)
998 len = (cl == NULL) ? NULL_TREE : cl->backend_decl;
1000 return gfc_get_character_type_len (kind, len);
1003 /* Covert a basic type. This will be an array for character types. */
1006 gfc_typenode_for_spec (gfc_typespec * spec)
1016 /* We use INTEGER(c_intptr_t) for C_PTR and C_FUNPTR once the symbol
1017 has been resolved. This is done so we can convert C_PTR and
1018 C_FUNPTR to simple variables that get translated to (void *). */
1019 if (spec->f90_type == BT_VOID)
1022 && spec->u.derived->intmod_sym_id == ISOCBINDING_PTR)
1023 basetype = ptr_type_node;
1025 basetype = pfunc_type_node;
1028 basetype = gfc_get_int_type (spec->kind);
1032 basetype = gfc_get_real_type (spec->kind);
1036 basetype = gfc_get_complex_type (spec->kind);
1040 basetype = gfc_get_logical_type (spec->kind);
1046 basetype = gfc_get_character_type (spec->kind, NULL);
1049 basetype = gfc_get_character_type (spec->kind, spec->u.cl);
1054 basetype = gfc_get_derived_type (spec->u.derived);
1056 /* If we're dealing with either C_PTR or C_FUNPTR, we modified the
1057 type and kind to fit a (void *) and the basetype returned was a
1058 ptr_type_node. We need to pass up this new information to the
1059 symbol that was declared of type C_PTR or C_FUNPTR. */
1060 if (spec->u.derived->attr.is_iso_c)
1062 spec->type = spec->u.derived->ts.type;
1063 spec->kind = spec->u.derived->ts.kind;
1064 spec->f90_type = spec->u.derived->ts.f90_type;
1068 /* This is for the second arg to c_f_pointer and c_f_procpointer
1069 of the iso_c_binding module, to accept any ptr type. */
1070 basetype = ptr_type_node;
1071 if (spec->f90_type == BT_VOID)
1074 && spec->u.derived->intmod_sym_id == ISOCBINDING_PTR)
1075 basetype = ptr_type_node;
1077 basetype = pfunc_type_node;
1086 /* Build an INT_CST for constant expressions, otherwise return NULL_TREE. */
1089 gfc_conv_array_bound (gfc_expr * expr)
1091 /* If expr is an integer constant, return that. */
1092 if (expr != NULL && expr->expr_type == EXPR_CONSTANT)
1093 return gfc_conv_mpz_to_tree (expr->value.integer, gfc_index_integer_kind);
1095 /* Otherwise return NULL. */
1100 gfc_get_element_type (tree type)
1104 if (GFC_ARRAY_TYPE_P (type))
1106 if (TREE_CODE (type) == POINTER_TYPE)
1107 type = TREE_TYPE (type);
1108 if (GFC_TYPE_ARRAY_RANK (type) == 0)
1110 gcc_assert (GFC_TYPE_ARRAY_CORANK (type) > 0);
1115 gcc_assert (TREE_CODE (type) == ARRAY_TYPE);
1116 element = TREE_TYPE (type);
1121 gcc_assert (GFC_DESCRIPTOR_TYPE_P (type));
1122 element = GFC_TYPE_ARRAY_DATAPTR_TYPE (type);
1124 gcc_assert (TREE_CODE (element) == POINTER_TYPE);
1125 element = TREE_TYPE (element);
1127 /* For arrays, which are not scalar coarrays. */
1128 if (TREE_CODE (element) == ARRAY_TYPE)
1129 element = TREE_TYPE (element);
1135 /* Build an array. This function is called from gfc_sym_type().
1136 Actually returns array descriptor type.
1138 Format of array descriptors is as follows:
1140 struct gfc_array_descriptor
1145 struct descriptor_dimension dimension[N_DIM];
1148 struct descriptor_dimension
1155 Translation code should use gfc_conv_descriptor_* rather than
1156 accessing the descriptor directly. Any changes to the array
1157 descriptor type will require changes in gfc_conv_descriptor_* and
1158 gfc_build_array_initializer.
1160 This is represented internally as a RECORD_TYPE. The index nodes
1161 are gfc_array_index_type and the data node is a pointer to the
1162 data. See below for the handling of character types.
1164 The dtype member is formatted as follows:
1165 rank = dtype & GFC_DTYPE_RANK_MASK // 3 bits
1166 type = (dtype & GFC_DTYPE_TYPE_MASK) >> GFC_DTYPE_TYPE_SHIFT // 3 bits
1167 size = dtype >> GFC_DTYPE_SIZE_SHIFT
1169 I originally used nested ARRAY_TYPE nodes to represent arrays, but
1170 this generated poor code for assumed/deferred size arrays. These
1171 require use of PLACEHOLDER_EXPR/WITH_RECORD_EXPR, which isn't part
1172 of the GENERIC grammar. Also, there is no way to explicitly set
1173 the array stride, so all data must be packed(1). I've tried to
1174 mark all the functions which would require modification with a GCC
1177 The data component points to the first element in the array. The
1178 offset field is the position of the origin of the array (i.e. element
1179 (0, 0 ...)). This may be outside the bounds of the array.
1181 An element is accessed by
1182 data[offset + index0*stride0 + index1*stride1 + index2*stride2]
1183 This gives good performance as the computation does not involve the
1184 bounds of the array. For packed arrays, this is optimized further
1185 by substituting the known strides.
1187 This system has one problem: all array bounds must be within 2^31
1188 elements of the origin (2^63 on 64-bit machines). For example
1189 integer, dimension (80000:90000, 80000:90000, 2) :: array
1190 may not work properly on 32-bit machines because 80000*80000 >
1191 2^31, so the calculation for stride2 would overflow. This may
1192 still work, but I haven't checked, and it relies on the overflow
1193 doing the right thing.
1195 The way to fix this problem is to access elements as follows:
1196 data[(index0-lbound0)*stride0 + (index1-lbound1)*stride1]
1197 Obviously this is much slower. I will make this a compile time
1198 option, something like -fsmall-array-offsets. Mixing code compiled
1199 with and without this switch will work.
1201 (1) This can be worked around by modifying the upper bound of the
1202 previous dimension. This requires extra fields in the descriptor
1203 (both real_ubound and fake_ubound). */
1206 /* Returns true if the array sym does not require a descriptor. */
1209 gfc_is_nodesc_array (gfc_symbol * sym)
1211 gcc_assert (sym->attr.dimension || sym->attr.codimension);
1213 /* We only want local arrays. */
1214 if (sym->attr.pointer || sym->attr.allocatable)
1217 /* We want a descriptor for associate-name arrays that do not have an
1218 explicitely known shape already. */
1219 if (sym->assoc && sym->as->type != AS_EXPLICIT)
1222 if (sym->attr.dummy)
1223 return sym->as->type != AS_ASSUMED_SHAPE;
1225 if (sym->attr.result || sym->attr.function)
1228 gcc_assert (sym->as->type == AS_EXPLICIT || sym->as->cp_was_assumed);
1234 /* Create an array descriptor type. */
1237 gfc_build_array_type (tree type, gfc_array_spec * as,
1238 enum gfc_array_kind akind, bool restricted,
1241 tree lbound[GFC_MAX_DIMENSIONS];
1242 tree ubound[GFC_MAX_DIMENSIONS];
1245 for (n = 0; n < as->rank; n++)
1247 /* Create expressions for the known bounds of the array. */
1248 if (as->type == AS_ASSUMED_SHAPE && as->lower[n] == NULL)
1249 lbound[n] = gfc_index_one_node;
1251 lbound[n] = gfc_conv_array_bound (as->lower[n]);
1252 ubound[n] = gfc_conv_array_bound (as->upper[n]);
1255 for (n = as->rank; n < as->rank + as->corank; n++)
1257 if (as->type != AS_DEFERRED && as->lower[n] == NULL)
1258 lbound[n] = gfc_index_one_node;
1260 lbound[n] = gfc_conv_array_bound (as->lower[n]);
1262 if (n < as->rank + as->corank - 1)
1263 ubound[n] = gfc_conv_array_bound (as->upper[n]);
1266 if (as->type == AS_ASSUMED_SHAPE)
1267 akind = contiguous ? GFC_ARRAY_ASSUMED_SHAPE_CONT
1268 : GFC_ARRAY_ASSUMED_SHAPE;
1269 return gfc_get_array_type_bounds (type, as->rank, as->corank, lbound,
1270 ubound, 0, akind, restricted);
1273 /* Returns the struct descriptor_dimension type. */
1276 gfc_get_desc_dim_type (void)
1279 tree decl, *chain = NULL;
1281 if (gfc_desc_dim_type)
1282 return gfc_desc_dim_type;
1284 /* Build the type node. */
1285 type = make_node (RECORD_TYPE);
1287 TYPE_NAME (type) = get_identifier ("descriptor_dimension");
1288 TYPE_PACKED (type) = 1;
1290 /* Consists of the stride, lbound and ubound members. */
1291 decl = gfc_add_field_to_struct_1 (type,
1292 get_identifier ("stride"),
1293 gfc_array_index_type, &chain);
1294 TREE_NO_WARNING (decl) = 1;
1296 decl = gfc_add_field_to_struct_1 (type,
1297 get_identifier ("lbound"),
1298 gfc_array_index_type, &chain);
1299 TREE_NO_WARNING (decl) = 1;
1301 decl = gfc_add_field_to_struct_1 (type,
1302 get_identifier ("ubound"),
1303 gfc_array_index_type, &chain);
1304 TREE_NO_WARNING (decl) = 1;
1306 /* Finish off the type. */
1307 gfc_finish_type (type);
1308 TYPE_DECL_SUPPRESS_DEBUG (TYPE_STUB_DECL (type)) = 1;
1310 gfc_desc_dim_type = type;
1315 /* Return the DTYPE for an array. This describes the type and type parameters
1317 /* TODO: Only call this when the value is actually used, and make all the
1318 unknown cases abort. */
1321 gfc_get_dtype (tree type)
1331 gcc_assert (GFC_DESCRIPTOR_TYPE_P (type) || GFC_ARRAY_TYPE_P (type));
1333 if (GFC_TYPE_ARRAY_DTYPE (type))
1334 return GFC_TYPE_ARRAY_DTYPE (type);
1336 rank = GFC_TYPE_ARRAY_RANK (type);
1337 etype = gfc_get_element_type (type);
1339 switch (TREE_CODE (etype))
1357 /* We will never have arrays of arrays. */
1367 /* TODO: Don't do dtype for temporary descriptorless arrays. */
1368 /* We can strange array types for temporary arrays. */
1369 return gfc_index_zero_node;
1372 gcc_assert (rank <= GFC_DTYPE_RANK_MASK);
1373 size = TYPE_SIZE_UNIT (etype);
1375 i = rank | (n << GFC_DTYPE_TYPE_SHIFT);
1376 if (size && INTEGER_CST_P (size))
1378 if (tree_int_cst_lt (gfc_max_array_element_size, size))
1379 internal_error ("Array element size too big");
1381 i += TREE_INT_CST_LOW (size) << GFC_DTYPE_SIZE_SHIFT;
1383 dtype = build_int_cst (gfc_array_index_type, i);
1385 if (size && !INTEGER_CST_P (size))
1387 tmp = build_int_cst (gfc_array_index_type, GFC_DTYPE_SIZE_SHIFT);
1388 tmp = fold_build2_loc (input_location, LSHIFT_EXPR,
1389 gfc_array_index_type,
1390 fold_convert (gfc_array_index_type, size), tmp);
1391 dtype = fold_build2_loc (input_location, PLUS_EXPR, gfc_array_index_type,
1394 /* If we don't know the size we leave it as zero. This should never happen
1395 for anything that is actually used. */
1396 /* TODO: Check this is actually true, particularly when repacking
1397 assumed size parameters. */
1399 GFC_TYPE_ARRAY_DTYPE (type) = dtype;
1404 /* Build an array type for use without a descriptor, packed according
1405 to the value of PACKED. */
1408 gfc_get_nodesc_array_type (tree etype, gfc_array_spec * as, gfc_packed packed,
1422 mpz_init_set_ui (offset, 0);
1423 mpz_init_set_ui (stride, 1);
1426 /* We don't use build_array_type because this does not include include
1427 lang-specific information (i.e. the bounds of the array) when checking
1430 type = make_node (ARRAY_TYPE);
1432 type = build_variant_type_copy (etype);
1434 GFC_ARRAY_TYPE_P (type) = 1;
1435 TYPE_LANG_SPECIFIC (type)
1436 = ggc_alloc_cleared_lang_type (sizeof (struct lang_type));
1438 known_stride = (packed != PACKED_NO);
1440 for (n = 0; n < as->rank; n++)
1442 /* Fill in the stride and bound components of the type. */
1444 tmp = gfc_conv_mpz_to_tree (stride, gfc_index_integer_kind);
1447 GFC_TYPE_ARRAY_STRIDE (type, n) = tmp;
1449 expr = as->lower[n];
1450 if (expr->expr_type == EXPR_CONSTANT)
1452 tmp = gfc_conv_mpz_to_tree (expr->value.integer,
1453 gfc_index_integer_kind);
1460 GFC_TYPE_ARRAY_LBOUND (type, n) = tmp;
1464 /* Calculate the offset. */
1465 mpz_mul (delta, stride, as->lower[n]->value.integer);
1466 mpz_sub (offset, offset, delta);
1471 expr = as->upper[n];
1472 if (expr && expr->expr_type == EXPR_CONSTANT)
1474 tmp = gfc_conv_mpz_to_tree (expr->value.integer,
1475 gfc_index_integer_kind);
1482 GFC_TYPE_ARRAY_UBOUND (type, n) = tmp;
1486 /* Calculate the stride. */
1487 mpz_sub (delta, as->upper[n]->value.integer,
1488 as->lower[n]->value.integer);
1489 mpz_add_ui (delta, delta, 1);
1490 mpz_mul (stride, stride, delta);
1493 /* Only the first stride is known for partial packed arrays. */
1494 if (packed == PACKED_NO || packed == PACKED_PARTIAL)
1497 for (n = as->rank; n < as->rank + as->corank; n++)
1499 expr = as->lower[n];
1500 if (expr->expr_type == EXPR_CONSTANT)
1501 tmp = gfc_conv_mpz_to_tree (expr->value.integer,
1502 gfc_index_integer_kind);
1505 GFC_TYPE_ARRAY_LBOUND (type, n) = tmp;
1507 expr = as->upper[n];
1508 if (expr && expr->expr_type == EXPR_CONSTANT)
1509 tmp = gfc_conv_mpz_to_tree (expr->value.integer,
1510 gfc_index_integer_kind);
1513 if (n < as->rank + as->corank - 1)
1514 GFC_TYPE_ARRAY_UBOUND (type, n) = tmp;
1519 GFC_TYPE_ARRAY_OFFSET (type) =
1520 gfc_conv_mpz_to_tree (offset, gfc_index_integer_kind);
1523 GFC_TYPE_ARRAY_OFFSET (type) = NULL_TREE;
1527 GFC_TYPE_ARRAY_SIZE (type) =
1528 gfc_conv_mpz_to_tree (stride, gfc_index_integer_kind);
1531 GFC_TYPE_ARRAY_SIZE (type) = NULL_TREE;
1533 GFC_TYPE_ARRAY_RANK (type) = as->rank;
1534 GFC_TYPE_ARRAY_CORANK (type) = as->corank;
1535 GFC_TYPE_ARRAY_DTYPE (type) = NULL_TREE;
1536 range = build_range_type (gfc_array_index_type, gfc_index_zero_node,
1538 /* TODO: use main type if it is unbounded. */
1539 GFC_TYPE_ARRAY_DATAPTR_TYPE (type) =
1540 build_pointer_type (build_array_type (etype, range));
1542 GFC_TYPE_ARRAY_DATAPTR_TYPE (type) =
1543 build_qualified_type (GFC_TYPE_ARRAY_DATAPTR_TYPE (type),
1544 TYPE_QUAL_RESTRICT);
1548 if (packed != PACKED_STATIC || gfc_option.coarray == GFC_FCOARRAY_LIB)
1550 type = build_pointer_type (type);
1553 type = build_qualified_type (type, TYPE_QUAL_RESTRICT);
1555 GFC_ARRAY_TYPE_P (type) = 1;
1556 TYPE_LANG_SPECIFIC (type) = TYPE_LANG_SPECIFIC (TREE_TYPE (type));
1564 mpz_sub_ui (stride, stride, 1);
1565 range = gfc_conv_mpz_to_tree (stride, gfc_index_integer_kind);
1570 range = build_range_type (gfc_array_index_type, gfc_index_zero_node, range);
1571 TYPE_DOMAIN (type) = range;
1573 build_pointer_type (etype);
1574 TREE_TYPE (type) = etype;
1582 /* Represent packed arrays as multi-dimensional if they have rank >
1583 1 and with proper bounds, instead of flat arrays. This makes for
1584 better debug info. */
1587 tree gtype = etype, rtype, type_decl;
1589 for (n = as->rank - 1; n >= 0; n--)
1591 rtype = build_range_type (gfc_array_index_type,
1592 GFC_TYPE_ARRAY_LBOUND (type, n),
1593 GFC_TYPE_ARRAY_UBOUND (type, n));
1594 gtype = build_array_type (gtype, rtype);
1596 TYPE_NAME (type) = type_decl = build_decl (input_location,
1597 TYPE_DECL, NULL, gtype);
1598 DECL_ORIGINAL_TYPE (type_decl) = gtype;
1601 if (packed != PACKED_STATIC || !known_stride
1602 || (as->corank && gfc_option.coarray == GFC_FCOARRAY_LIB))
1604 /* For dummy arrays and automatic (heap allocated) arrays we
1605 want a pointer to the array. */
1606 type = build_pointer_type (type);
1608 type = build_qualified_type (type, TYPE_QUAL_RESTRICT);
1609 GFC_ARRAY_TYPE_P (type) = 1;
1610 TYPE_LANG_SPECIFIC (type) = TYPE_LANG_SPECIFIC (TREE_TYPE (type));
1616 /* Return or create the base type for an array descriptor. */
1619 gfc_get_array_descriptor_base (int dimen, int codimen, bool restricted,
1620 enum gfc_array_kind akind)
1622 tree fat_type, decl, arraytype, *chain = NULL;
1623 char name[16 + 2*GFC_RANK_DIGITS + 1 + 1];
1624 int idx = 2 * (codimen + dimen - 1) + restricted;
1626 gcc_assert (codimen + dimen >= 1 && codimen + dimen <= GFC_MAX_DIMENSIONS);
1628 if (gfc_option.coarray == GFC_FCOARRAY_LIB && codimen)
1630 if (gfc_array_descriptor_base_caf[idx])
1631 return gfc_array_descriptor_base_caf[idx];
1633 else if (gfc_array_descriptor_base[idx])
1634 return gfc_array_descriptor_base[idx];
1636 /* Build the type node. */
1637 fat_type = make_node (RECORD_TYPE);
1639 sprintf (name, "array_descriptor" GFC_RANK_PRINTF_FORMAT, dimen + codimen);
1640 TYPE_NAME (fat_type) = get_identifier (name);
1641 TYPE_NAMELESS (fat_type) = 1;
1643 /* Add the data member as the first element of the descriptor. */
1644 decl = gfc_add_field_to_struct_1 (fat_type,
1645 get_identifier ("data"),
1648 : ptr_type_node), &chain);
1650 /* Add the base component. */
1651 decl = gfc_add_field_to_struct_1 (fat_type,
1652 get_identifier ("offset"),
1653 gfc_array_index_type, &chain);
1654 TREE_NO_WARNING (decl) = 1;
1656 /* Add the dtype component. */
1657 decl = gfc_add_field_to_struct_1 (fat_type,
1658 get_identifier ("dtype"),
1659 gfc_array_index_type, &chain);
1660 TREE_NO_WARNING (decl) = 1;
1662 /* Build the array type for the stride and bound components. */
1664 build_array_type (gfc_get_desc_dim_type (),
1665 build_range_type (gfc_array_index_type,
1666 gfc_index_zero_node,
1667 gfc_rank_cst[codimen + dimen - 1]));
1669 decl = gfc_add_field_to_struct_1 (fat_type,
1670 get_identifier ("dim"),
1672 TREE_NO_WARNING (decl) = 1;
1674 if (gfc_option.coarray == GFC_FCOARRAY_LIB && codimen
1675 && akind == GFC_ARRAY_ALLOCATABLE)
1677 decl = gfc_add_field_to_struct_1 (fat_type,
1678 get_identifier ("token"),
1679 prvoid_type_node, &chain);
1680 TREE_NO_WARNING (decl) = 1;
1683 /* Finish off the type. */
1684 gfc_finish_type (fat_type);
1685 TYPE_DECL_SUPPRESS_DEBUG (TYPE_STUB_DECL (fat_type)) = 1;
1687 if (gfc_option.coarray == GFC_FCOARRAY_LIB && codimen
1688 && akind == GFC_ARRAY_ALLOCATABLE)
1689 gfc_array_descriptor_base_caf[idx] = fat_type;
1691 gfc_array_descriptor_base[idx] = fat_type;
1697 /* Build an array (descriptor) type with given bounds. */
1700 gfc_get_array_type_bounds (tree etype, int dimen, int codimen, tree * lbound,
1701 tree * ubound, int packed,
1702 enum gfc_array_kind akind, bool restricted)
1704 char name[8 + 2*GFC_RANK_DIGITS + 1 + GFC_MAX_SYMBOL_LEN];
1705 tree fat_type, base_type, arraytype, lower, upper, stride, tmp, rtype;
1706 const char *type_name;
1709 base_type = gfc_get_array_descriptor_base (dimen, codimen, restricted, akind);
1710 fat_type = build_distinct_type_copy (base_type);
1711 /* Make sure that nontarget and target array type have the same canonical
1712 type (and same stub decl for debug info). */
1713 base_type = gfc_get_array_descriptor_base (dimen, codimen, false, akind);
1714 TYPE_CANONICAL (fat_type) = base_type;
1715 TYPE_STUB_DECL (fat_type) = TYPE_STUB_DECL (base_type);
1717 tmp = TYPE_NAME (etype);
1718 if (tmp && TREE_CODE (tmp) == TYPE_DECL)
1719 tmp = DECL_NAME (tmp);
1721 type_name = IDENTIFIER_POINTER (tmp);
1723 type_name = "unknown";
1724 sprintf (name, "array" GFC_RANK_PRINTF_FORMAT "_%.*s", dimen + codimen,
1725 GFC_MAX_SYMBOL_LEN, type_name);
1726 TYPE_NAME (fat_type) = get_identifier (name);
1727 TYPE_NAMELESS (fat_type) = 1;
1729 GFC_DESCRIPTOR_TYPE_P (fat_type) = 1;
1730 TYPE_LANG_SPECIFIC (fat_type)
1731 = ggc_alloc_cleared_lang_type (sizeof (struct lang_type));
1733 GFC_TYPE_ARRAY_RANK (fat_type) = dimen;
1734 GFC_TYPE_ARRAY_CORANK (fat_type) = codimen;
1735 GFC_TYPE_ARRAY_DTYPE (fat_type) = NULL_TREE;
1736 GFC_TYPE_ARRAY_AKIND (fat_type) = akind;
1738 /* Build an array descriptor record type. */
1740 stride = gfc_index_one_node;
1743 for (n = 0; n < dimen + codimen; n++)
1746 GFC_TYPE_ARRAY_STRIDE (fat_type, n) = stride;
1753 if (lower != NULL_TREE)
1755 if (INTEGER_CST_P (lower))
1756 GFC_TYPE_ARRAY_LBOUND (fat_type, n) = lower;
1761 if (codimen && n == dimen + codimen - 1)
1765 if (upper != NULL_TREE)
1767 if (INTEGER_CST_P (upper))
1768 GFC_TYPE_ARRAY_UBOUND (fat_type, n) = upper;
1776 if (upper != NULL_TREE && lower != NULL_TREE && stride != NULL_TREE)
1778 tmp = fold_build2_loc (input_location, MINUS_EXPR,
1779 gfc_array_index_type, upper, lower);
1780 tmp = fold_build2_loc (input_location, PLUS_EXPR,
1781 gfc_array_index_type, tmp,
1782 gfc_index_one_node);
1783 stride = fold_build2_loc (input_location, MULT_EXPR,
1784 gfc_array_index_type, tmp, stride);
1785 /* Check the folding worked. */
1786 gcc_assert (INTEGER_CST_P (stride));
1791 GFC_TYPE_ARRAY_SIZE (fat_type) = stride;
1793 /* TODO: known offsets for descriptors. */
1794 GFC_TYPE_ARRAY_OFFSET (fat_type) = NULL_TREE;
1798 arraytype = build_pointer_type (etype);
1800 arraytype = build_qualified_type (arraytype, TYPE_QUAL_RESTRICT);
1802 GFC_TYPE_ARRAY_DATAPTR_TYPE (fat_type) = arraytype;
1806 /* We define data as an array with the correct size if possible.
1807 Much better than doing pointer arithmetic. */
1809 rtype = build_range_type (gfc_array_index_type, gfc_index_zero_node,
1810 int_const_binop (MINUS_EXPR, stride,
1813 rtype = gfc_array_range_type;
1814 arraytype = build_array_type (etype, rtype);
1815 arraytype = build_pointer_type (arraytype);
1817 arraytype = build_qualified_type (arraytype, TYPE_QUAL_RESTRICT);
1818 GFC_TYPE_ARRAY_DATAPTR_TYPE (fat_type) = arraytype;
1820 /* This will generate the base declarations we need to emit debug
1821 information for this type. FIXME: there must be a better way to
1822 avoid divergence between compilations with and without debug
1825 struct array_descr_info info;
1826 gfc_get_array_descr_info (fat_type, &info);
1827 gfc_get_array_descr_info (build_pointer_type (fat_type), &info);
1833 /* Build a pointer type. This function is called from gfc_sym_type(). */
1836 gfc_build_pointer_type (gfc_symbol * sym, tree type)
1838 /* Array pointer types aren't actually pointers. */
1839 if (sym->attr.dimension)
1842 return build_pointer_type (type);
1845 static tree gfc_nonrestricted_type (tree t);
1846 /* Given two record or union type nodes TO and FROM, ensure
1847 that all fields in FROM have a corresponding field in TO,
1848 their type being nonrestrict variants. This accepts a TO
1849 node that already has a prefix of the fields in FROM. */
1851 mirror_fields (tree to, tree from)
1856 /* Forward to the end of TOs fields. */
1857 fto = TYPE_FIELDS (to);
1858 ffrom = TYPE_FIELDS (from);
1859 chain = &TYPE_FIELDS (to);
1862 gcc_assert (ffrom && DECL_NAME (fto) == DECL_NAME (ffrom));
1863 chain = &DECL_CHAIN (fto);
1864 fto = DECL_CHAIN (fto);
1865 ffrom = DECL_CHAIN (ffrom);
1868 /* Now add all fields remaining in FROM (starting with ffrom). */
1869 for (; ffrom; ffrom = DECL_CHAIN (ffrom))
1871 tree newfield = copy_node (ffrom);
1872 DECL_CONTEXT (newfield) = to;
1873 /* The store to DECL_CHAIN might seem redundant with the
1874 stores to *chain, but not clearing it here would mean
1875 leaving a chain into the old fields. If ever
1876 our called functions would look at them confusion
1878 DECL_CHAIN (newfield) = NULL_TREE;
1880 chain = &DECL_CHAIN (newfield);
1882 if (TREE_CODE (ffrom) == FIELD_DECL)
1884 tree elemtype = gfc_nonrestricted_type (TREE_TYPE (ffrom));
1885 TREE_TYPE (newfield) = elemtype;
1891 /* Given a type T, returns a different type of the same structure,
1892 except that all types it refers to (recursively) are always
1893 non-restrict qualified types. */
1895 gfc_nonrestricted_type (tree t)
1899 /* If the type isn't layed out yet, don't copy it. If something
1900 needs it for real it should wait until the type got finished. */
1904 if (!TYPE_LANG_SPECIFIC (t))
1905 TYPE_LANG_SPECIFIC (t)
1906 = ggc_alloc_cleared_lang_type (sizeof (struct lang_type));
1907 /* If we're dealing with this very node already further up
1908 the call chain (recursion via pointers and struct members)
1909 we haven't yet determined if we really need a new type node.
1910 Assume we don't, return T itself. */
1911 if (TYPE_LANG_SPECIFIC (t)->nonrestricted_type == error_mark_node)
1914 /* If we have calculated this all already, just return it. */
1915 if (TYPE_LANG_SPECIFIC (t)->nonrestricted_type)
1916 return TYPE_LANG_SPECIFIC (t)->nonrestricted_type;
1918 /* Mark this type. */
1919 TYPE_LANG_SPECIFIC (t)->nonrestricted_type = error_mark_node;
1921 switch (TREE_CODE (t))
1927 case REFERENCE_TYPE:
1929 tree totype = gfc_nonrestricted_type (TREE_TYPE (t));
1930 if (totype == TREE_TYPE (t))
1932 else if (TREE_CODE (t) == POINTER_TYPE)
1933 ret = build_pointer_type (totype);
1935 ret = build_reference_type (totype);
1936 ret = build_qualified_type (ret,
1937 TYPE_QUALS (t) & ~TYPE_QUAL_RESTRICT);
1943 tree elemtype = gfc_nonrestricted_type (TREE_TYPE (t));
1944 if (elemtype == TREE_TYPE (t))
1948 ret = build_variant_type_copy (t);
1949 TREE_TYPE (ret) = elemtype;
1950 if (TYPE_LANG_SPECIFIC (t)
1951 && GFC_TYPE_ARRAY_DATAPTR_TYPE (t))
1953 tree dataptr_type = GFC_TYPE_ARRAY_DATAPTR_TYPE (t);
1954 dataptr_type = gfc_nonrestricted_type (dataptr_type);
1955 if (dataptr_type != GFC_TYPE_ARRAY_DATAPTR_TYPE (t))
1957 TYPE_LANG_SPECIFIC (ret)
1958 = ggc_alloc_cleared_lang_type (sizeof (struct
1960 *TYPE_LANG_SPECIFIC (ret) = *TYPE_LANG_SPECIFIC (t);
1961 GFC_TYPE_ARRAY_DATAPTR_TYPE (ret) = dataptr_type;
1970 case QUAL_UNION_TYPE:
1973 /* First determine if we need a new type at all.
1974 Careful, the two calls to gfc_nonrestricted_type per field
1975 might return different values. That happens exactly when
1976 one of the fields reaches back to this very record type
1977 (via pointers). The first calls will assume that we don't
1978 need to copy T (see the error_mark_node marking). If there
1979 are any reasons for copying T apart from having to copy T,
1980 we'll indeed copy it, and the second calls to
1981 gfc_nonrestricted_type will use that new node if they
1983 for (field = TYPE_FIELDS (t); field; field = DECL_CHAIN (field))
1984 if (TREE_CODE (field) == FIELD_DECL)
1986 tree elemtype = gfc_nonrestricted_type (TREE_TYPE (field));
1987 if (elemtype != TREE_TYPE (field))
1992 ret = build_variant_type_copy (t);
1993 TYPE_FIELDS (ret) = NULL_TREE;
1995 /* Here we make sure that as soon as we know we have to copy
1996 T, that also fields reaching back to us will use the new
1997 copy. It's okay if that copy still contains the old fields,
1998 we won't look at them. */
1999 TYPE_LANG_SPECIFIC (t)->nonrestricted_type = ret;
2000 mirror_fields (ret, t);
2005 TYPE_LANG_SPECIFIC (t)->nonrestricted_type = ret;
2010 /* Return the type for a symbol. Special handling is required for character
2011 types to get the correct level of indirection.
2012 For functions return the return type.
2013 For subroutines return void_type_node.
2014 Calling this multiple times for the same symbol should be avoided,
2015 especially for character and array types. */
2018 gfc_sym_type (gfc_symbol * sym)
2024 /* Procedure Pointers inside COMMON blocks. */
2025 if (sym->attr.proc_pointer && sym->attr.in_common)
2027 /* Unset proc_pointer as gfc_get_function_type calls gfc_sym_type. */
2028 sym->attr.proc_pointer = 0;
2029 type = build_pointer_type (gfc_get_function_type (sym));
2030 sym->attr.proc_pointer = 1;
2034 if (sym->attr.flavor == FL_PROCEDURE && !sym->attr.function)
2035 return void_type_node;
2037 /* In the case of a function the fake result variable may have a
2038 type different from the function type, so don't return early in
2040 if (sym->backend_decl && !sym->attr.function)
2041 return TREE_TYPE (sym->backend_decl);
2043 if (sym->ts.type == BT_CHARACTER
2044 && ((sym->attr.function && sym->attr.is_bind_c)
2045 || (sym->attr.result
2046 && sym->ns->proc_name
2047 && sym->ns->proc_name->attr.is_bind_c)))
2048 type = gfc_character1_type_node;
2050 type = gfc_typenode_for_spec (&sym->ts);
2052 if (sym->attr.dummy && !sym->attr.function && !sym->attr.value)
2057 restricted = !sym->attr.target && !sym->attr.pointer
2058 && !sym->attr.proc_pointer && !sym->attr.cray_pointee;
2060 type = gfc_nonrestricted_type (type);
2062 if (sym->attr.dimension || sym->attr.codimension)
2064 if (gfc_is_nodesc_array (sym))
2066 /* If this is a character argument of unknown length, just use the
2068 if (sym->ts.type != BT_CHARACTER
2069 || !(sym->attr.dummy || sym->attr.function)
2070 || sym->ts.u.cl->backend_decl)
2072 type = gfc_get_nodesc_array_type (type, sym->as,
2079 if (sym->attr.cray_pointee)
2080 GFC_POINTER_TYPE_P (type) = 1;
2084 enum gfc_array_kind akind = GFC_ARRAY_UNKNOWN;
2085 if (sym->attr.pointer)
2086 akind = sym->attr.contiguous ? GFC_ARRAY_POINTER_CONT
2087 : GFC_ARRAY_POINTER;
2088 else if (sym->attr.allocatable)
2089 akind = GFC_ARRAY_ALLOCATABLE;
2090 type = gfc_build_array_type (type, sym->as, akind, restricted,
2091 sym->attr.contiguous);
2096 if (sym->attr.allocatable || sym->attr.pointer
2097 || gfc_is_associate_pointer (sym))
2098 type = gfc_build_pointer_type (sym, type);
2099 if (sym->attr.pointer || sym->attr.cray_pointee)
2100 GFC_POINTER_TYPE_P (type) = 1;
2103 /* We currently pass all parameters by reference.
2104 See f95_get_function_decl. For dummy function parameters return the
2108 /* We must use pointer types for potentially absent variables. The
2109 optimizers assume a reference type argument is never NULL. */
2110 if (sym->attr.optional
2111 || (sym->ns->proc_name && sym->ns->proc_name->attr.entry_master))
2112 type = build_pointer_type (type);
2115 type = build_reference_type (type);
2117 type = build_qualified_type (type, TYPE_QUAL_RESTRICT);
2124 /* Layout and output debug info for a record type. */
2127 gfc_finish_type (tree type)
2131 decl = build_decl (input_location,
2132 TYPE_DECL, NULL_TREE, type);
2133 TYPE_STUB_DECL (type) = decl;
2135 rest_of_type_compilation (type, 1);
2136 rest_of_decl_compilation (decl, 1, 0);
2139 /* Add a field of given NAME and TYPE to the context of a UNION_TYPE
2140 or RECORD_TYPE pointed to by CONTEXT. The new field is chained
2141 to the end of the field list pointed to by *CHAIN.
2143 Returns a pointer to the new field. */
2146 gfc_add_field_to_struct_1 (tree context, tree name, tree type, tree **chain)
2148 tree decl = build_decl (input_location, FIELD_DECL, name, type);
2150 DECL_CONTEXT (decl) = context;
2151 DECL_CHAIN (decl) = NULL_TREE;
2152 if (TYPE_FIELDS (context) == NULL_TREE)
2153 TYPE_FIELDS (context) = decl;
2158 *chain = &DECL_CHAIN (decl);
2164 /* Like `gfc_add_field_to_struct_1', but adds alignment
2168 gfc_add_field_to_struct (tree context, tree name, tree type, tree **chain)
2170 tree decl = gfc_add_field_to_struct_1 (context, name, type, chain);
2172 DECL_INITIAL (decl) = 0;
2173 DECL_ALIGN (decl) = 0;
2174 DECL_USER_ALIGN (decl) = 0;
2180 /* Copy the backend_decl and component backend_decls if
2181 the two derived type symbols are "equal", as described
2182 in 4.4.2 and resolved by gfc_compare_derived_types. */
2185 gfc_copy_dt_decls_ifequal (gfc_symbol *from, gfc_symbol *to,
2188 gfc_component *to_cm;
2189 gfc_component *from_cm;
2191 if (from->backend_decl == NULL
2192 || !gfc_compare_derived_types (from, to))
2195 to->backend_decl = from->backend_decl;
2197 to_cm = to->components;
2198 from_cm = from->components;
2200 /* Copy the component declarations. If a component is itself
2201 a derived type, we need a copy of its component declarations.
2202 This is done by recursing into gfc_get_derived_type and
2203 ensures that the component's component declarations have
2204 been built. If it is a character, we need the character
2206 for (; to_cm; to_cm = to_cm->next, from_cm = from_cm->next)
2208 to_cm->backend_decl = from_cm->backend_decl;
2209 if (from_cm->ts.type == BT_DERIVED
2210 && (!from_cm->attr.pointer || from_gsym))
2211 gfc_get_derived_type (to_cm->ts.u.derived);
2212 else if (from_cm->ts.type == BT_CLASS
2213 && (!CLASS_DATA (from_cm)->attr.class_pointer || from_gsym))
2214 gfc_get_derived_type (to_cm->ts.u.derived);
2215 else if (from_cm->ts.type == BT_CHARACTER)
2216 to_cm->ts.u.cl->backend_decl = from_cm->ts.u.cl->backend_decl;
2223 /* Build a tree node for a procedure pointer component. */
2226 gfc_get_ppc_type (gfc_component* c)
2230 /* Explicit interface. */
2231 if (c->attr.if_source != IFSRC_UNKNOWN && c->ts.interface)
2232 return build_pointer_type (gfc_get_function_type (c->ts.interface));
2234 /* Implicit interface (only return value may be known). */
2235 if (c->attr.function && !c->attr.dimension && c->ts.type != BT_CHARACTER)
2236 t = gfc_typenode_for_spec (&c->ts);
2240 return build_pointer_type (build_function_type_list (t, NULL_TREE));
2244 /* Build a tree node for a derived type. If there are equal
2245 derived types, with different local names, these are built
2246 at the same time. If an equal derived type has been built
2247 in a parent namespace, this is used. */
2250 gfc_get_derived_type (gfc_symbol * derived)
2252 tree typenode = NULL, field = NULL, field_type = NULL;
2253 tree canonical = NULL_TREE;
2255 bool got_canonical = false;
2260 gcc_assert (derived && derived->attr.flavor == FL_DERIVED);
2262 /* See if it's one of the iso_c_binding derived types. */
2263 if (derived->attr.is_iso_c == 1)
2265 if (derived->backend_decl)
2266 return derived->backend_decl;
2268 if (derived->intmod_sym_id == ISOCBINDING_PTR)
2269 derived->backend_decl = ptr_type_node;
2271 derived->backend_decl = pfunc_type_node;
2273 derived->ts.kind = gfc_index_integer_kind;
2274 derived->ts.type = BT_INTEGER;
2275 /* Set the f90_type to BT_VOID as a way to recognize something of type
2276 BT_INTEGER that needs to fit a void * for the purpose of the
2277 iso_c_binding derived types. */
2278 derived->ts.f90_type = BT_VOID;
2280 return derived->backend_decl;
2283 /* If use associated, use the module type for this one. */
2284 if (gfc_option.flag_whole_file
2285 && derived->backend_decl == NULL
2286 && derived->attr.use_assoc
2288 && gfc_get_module_backend_decl (derived))
2289 goto copy_derived_types;
2291 /* If a whole file compilation, the derived types from an earlier
2292 namespace can be used as the canonical type. */
2293 if (gfc_option.flag_whole_file
2294 && derived->backend_decl == NULL
2295 && !derived->attr.use_assoc
2296 && gfc_global_ns_list)
2298 for (ns = gfc_global_ns_list;
2299 ns->translated && !got_canonical;
2302 dt = ns->derived_types;
2303 for (; dt && !canonical; dt = dt->next)
2305 gfc_copy_dt_decls_ifequal (dt->derived, derived, true);
2306 if (derived->backend_decl)
2307 got_canonical = true;
2312 /* Store up the canonical type to be added to this one. */
2315 if (TYPE_CANONICAL (derived->backend_decl))
2316 canonical = TYPE_CANONICAL (derived->backend_decl);
2318 canonical = derived->backend_decl;
2320 derived->backend_decl = NULL_TREE;
2323 /* derived->backend_decl != 0 means we saw it before, but its
2324 components' backend_decl may have not been built. */
2325 if (derived->backend_decl)
2327 /* Its components' backend_decl have been built or we are
2328 seeing recursion through the formal arglist of a procedure
2329 pointer component. */
2330 if (TYPE_FIELDS (derived->backend_decl)
2331 || derived->attr.proc_pointer_comp)
2332 return derived->backend_decl;
2334 typenode = derived->backend_decl;
2338 /* We see this derived type first time, so build the type node. */
2339 typenode = make_node (RECORD_TYPE);
2340 TYPE_NAME (typenode) = get_identifier (derived->name);
2341 TYPE_PACKED (typenode) = gfc_option.flag_pack_derived;
2342 derived->backend_decl = typenode;
2345 /* Go through the derived type components, building them as
2346 necessary. The reason for doing this now is that it is
2347 possible to recurse back to this derived type through a
2348 pointer component (PR24092). If this happens, the fields
2349 will be built and so we can return the type. */
2350 for (c = derived->components; c; c = c->next)
2352 if (c->ts.type != BT_DERIVED && c->ts.type != BT_CLASS)
2355 if ((!c->attr.pointer && !c->attr.proc_pointer)
2356 || c->ts.u.derived->backend_decl == NULL)
2357 c->ts.u.derived->backend_decl = gfc_get_derived_type (c->ts.u.derived);
2359 if (c->ts.u.derived && c->ts.u.derived->attr.is_iso_c)
2361 /* Need to copy the modified ts from the derived type. The
2362 typespec was modified because C_PTR/C_FUNPTR are translated
2363 into (void *) from derived types. */
2364 c->ts.type = c->ts.u.derived->ts.type;
2365 c->ts.kind = c->ts.u.derived->ts.kind;
2366 c->ts.f90_type = c->ts.u.derived->ts.f90_type;
2369 c->initializer->ts.type = c->ts.type;
2370 c->initializer->ts.kind = c->ts.kind;
2371 c->initializer->ts.f90_type = c->ts.f90_type;
2372 c->initializer->expr_type = EXPR_NULL;
2377 if (TYPE_FIELDS (derived->backend_decl))
2378 return derived->backend_decl;
2380 /* Build the type member list. Install the newly created RECORD_TYPE
2381 node as DECL_CONTEXT of each FIELD_DECL. */
2382 for (c = derived->components; c; c = c->next)
2384 if (c->attr.proc_pointer)
2385 field_type = gfc_get_ppc_type (c);
2386 else if (c->ts.type == BT_DERIVED || c->ts.type == BT_CLASS)
2387 field_type = c->ts.u.derived->backend_decl;
2390 if (c->ts.type == BT_CHARACTER)
2392 /* Evaluate the string length. */
2393 gfc_conv_const_charlen (c->ts.u.cl);
2394 gcc_assert (c->ts.u.cl->backend_decl);
2397 field_type = gfc_typenode_for_spec (&c->ts);
2400 /* This returns an array descriptor type. Initialization may be
2402 if ((c->attr.dimension || c->attr.codimension) && !c->attr.proc_pointer )
2404 if (c->attr.pointer || c->attr.allocatable)
2406 enum gfc_array_kind akind;
2407 if (c->attr.pointer)
2408 akind = c->attr.contiguous ? GFC_ARRAY_POINTER_CONT
2409 : GFC_ARRAY_POINTER;
2411 akind = GFC_ARRAY_ALLOCATABLE;
2412 /* Pointers to arrays aren't actually pointer types. The
2413 descriptors are separate, but the data is common. */
2414 field_type = gfc_build_array_type (field_type, c->as, akind,
2416 && !c->attr.pointer,
2417 c->attr.contiguous);
2420 field_type = gfc_get_nodesc_array_type (field_type, c->as,
2424 else if ((c->attr.pointer || c->attr.allocatable)
2425 && !c->attr.proc_pointer)
2426 field_type = build_pointer_type (field_type);
2428 if (c->attr.pointer)
2429 field_type = gfc_nonrestricted_type (field_type);
2431 /* vtype fields can point to different types to the base type. */
2432 if (c->ts.type == BT_DERIVED && c->ts.u.derived->attr.vtype)
2433 field_type = build_pointer_type_for_mode (TREE_TYPE (field_type),
2436 field = gfc_add_field_to_struct (typenode,
2437 get_identifier (c->name),
2438 field_type, &chain);
2440 gfc_set_decl_location (field, &c->loc);
2441 else if (derived->declared_at.lb)
2442 gfc_set_decl_location (field, &derived->declared_at);
2444 DECL_PACKED (field) |= TYPE_PACKED (typenode);
2447 if (!c->backend_decl)
2448 c->backend_decl = field;
2451 /* Now lay out the derived type, including the fields. */
2453 TYPE_CANONICAL (typenode) = canonical;
2455 gfc_finish_type (typenode);
2456 gfc_set_decl_location (TYPE_STUB_DECL (typenode), &derived->declared_at);
2457 if (derived->module && derived->ns->proc_name
2458 && derived->ns->proc_name->attr.flavor == FL_MODULE)
2460 if (derived->ns->proc_name->backend_decl
2461 && TREE_CODE (derived->ns->proc_name->backend_decl)
2464 TYPE_CONTEXT (typenode) = derived->ns->proc_name->backend_decl;
2465 DECL_CONTEXT (TYPE_STUB_DECL (typenode))
2466 = derived->ns->proc_name->backend_decl;
2470 derived->backend_decl = typenode;
2474 for (dt = gfc_derived_types; dt; dt = dt->next)
2475 gfc_copy_dt_decls_ifequal (derived, dt->derived, false);
2477 return derived->backend_decl;
2482 gfc_return_by_reference (gfc_symbol * sym)
2484 if (!sym->attr.function)
2487 if (sym->attr.dimension)
2490 if (sym->ts.type == BT_CHARACTER
2491 && !sym->attr.is_bind_c
2492 && (!sym->attr.result
2493 || !sym->ns->proc_name
2494 || !sym->ns->proc_name->attr.is_bind_c))
2497 /* Possibly return complex numbers by reference for g77 compatibility.
2498 We don't do this for calls to intrinsics (as the library uses the
2499 -fno-f2c calling convention), nor for calls to functions which always
2500 require an explicit interface, as no compatibility problems can
2502 if (gfc_option.flag_f2c
2503 && sym->ts.type == BT_COMPLEX
2504 && !sym->attr.intrinsic && !sym->attr.always_explicit)
2511 gfc_get_mixed_entry_union (gfc_namespace *ns)
2515 char name[GFC_MAX_SYMBOL_LEN + 1];
2516 gfc_entry_list *el, *el2;
2518 gcc_assert (ns->proc_name->attr.mixed_entry_master);
2519 gcc_assert (memcmp (ns->proc_name->name, "master.", 7) == 0);
2521 snprintf (name, GFC_MAX_SYMBOL_LEN, "munion.%s", ns->proc_name->name + 7);
2523 /* Build the type node. */
2524 type = make_node (UNION_TYPE);
2526 TYPE_NAME (type) = get_identifier (name);
2528 for (el = ns->entries; el; el = el->next)
2530 /* Search for duplicates. */
2531 for (el2 = ns->entries; el2 != el; el2 = el2->next)
2532 if (el2->sym->result == el->sym->result)
2536 gfc_add_field_to_struct_1 (type,
2537 get_identifier (el->sym->result->name),
2538 gfc_sym_type (el->sym->result), &chain);
2541 /* Finish off the type. */
2542 gfc_finish_type (type);
2543 TYPE_DECL_SUPPRESS_DEBUG (TYPE_STUB_DECL (type)) = 1;
2547 /* Create a "fn spec" based on the formal arguments;
2548 cf. create_function_arglist. */
2551 create_fn_spec (gfc_symbol *sym, tree fntype)
2555 gfc_formal_arglist *f;
2558 memset (&spec, 0, sizeof (spec));
2562 if (sym->attr.entry_master)
2563 spec[spec_len++] = 'R';
2564 if (gfc_return_by_reference (sym))
2566 gfc_symbol *result = sym->result ? sym->result : sym;
2568 if (result->attr.pointer || sym->attr.proc_pointer)
2569 spec[spec_len++] = '.';
2571 spec[spec_len++] = 'w';
2572 if (sym->ts.type == BT_CHARACTER)
2573 spec[spec_len++] = 'R';
2576 for (f = sym->formal; f; f = f->next)
2577 if (spec_len < sizeof (spec))
2579 if (!f->sym || f->sym->attr.pointer || f->sym->attr.target
2580 || f->sym->attr.external || f->sym->attr.cray_pointer
2581 || (f->sym->ts.type == BT_DERIVED
2582 && (f->sym->ts.u.derived->attr.proc_pointer_comp
2583 || f->sym->ts.u.derived->attr.pointer_comp))
2584 || (f->sym->ts.type == BT_CLASS
2585 && (CLASS_DATA (f->sym)->ts.u.derived->attr.proc_pointer_comp
2586 || CLASS_DATA (f->sym)->ts.u.derived->attr.pointer_comp)))
2587 spec[spec_len++] = '.';
2588 else if (f->sym->attr.intent == INTENT_IN)
2589 spec[spec_len++] = 'r';
2591 spec[spec_len++] = 'w';
2594 tmp = build_tree_list (NULL_TREE, build_string (spec_len, spec));
2595 tmp = tree_cons (get_identifier ("fn spec"), tmp, TYPE_ATTRIBUTES (fntype));
2596 return build_type_attribute_variant (fntype, tmp);
2601 gfc_get_function_type (gfc_symbol * sym)
2604 VEC(tree,gc) *typelist;
2605 gfc_formal_arglist *f;
2607 int alternate_return;
2608 bool is_varargs = true;
2610 /* Make sure this symbol is a function, a subroutine or the main
2612 gcc_assert (sym->attr.flavor == FL_PROCEDURE
2613 || sym->attr.flavor == FL_PROGRAM);
2615 if (sym->backend_decl)
2616 return TREE_TYPE (sym->backend_decl);
2618 alternate_return = 0;
2621 if (sym->attr.entry_master)
2622 /* Additional parameter for selecting an entry point. */
2623 VEC_safe_push (tree, gc, typelist, gfc_array_index_type);
2630 if (arg->ts.type == BT_CHARACTER)
2631 gfc_conv_const_charlen (arg->ts.u.cl);
2633 /* Some functions we use an extra parameter for the return value. */
2634 if (gfc_return_by_reference (sym))
2636 type = gfc_sym_type (arg);
2637 if (arg->ts.type == BT_COMPLEX
2638 || arg->attr.dimension
2639 || arg->ts.type == BT_CHARACTER)
2640 type = build_reference_type (type);
2642 VEC_safe_push (tree, gc, typelist, type);
2643 if (arg->ts.type == BT_CHARACTER)
2645 if (!arg->ts.deferred)
2646 /* Transfer by value. */
2647 VEC_safe_push (tree, gc, typelist, gfc_charlen_type_node);
2649 /* Deferred character lengths are transferred by reference
2650 so that the value can be returned. */
2651 VEC_safe_push (tree, gc, typelist,
2652 build_pointer_type (gfc_charlen_type_node));
2656 /* Build the argument types for the function. */
2657 for (f = sym->formal; f; f = f->next)
2662 /* Evaluate constant character lengths here so that they can be
2663 included in the type. */
2664 if (arg->ts.type == BT_CHARACTER)
2665 gfc_conv_const_charlen (arg->ts.u.cl);
2667 if (arg->attr.flavor == FL_PROCEDURE)
2669 type = gfc_get_function_type (arg);
2670 type = build_pointer_type (type);
2673 type = gfc_sym_type (arg);
2675 /* Parameter Passing Convention
2677 We currently pass all parameters by reference.
2678 Parameters with INTENT(IN) could be passed by value.
2679 The problem arises if a function is called via an implicit
2680 prototype. In this situation the INTENT is not known.
2681 For this reason all parameters to global functions must be
2682 passed by reference. Passing by value would potentially
2683 generate bad code. Worse there would be no way of telling that
2684 this code was bad, except that it would give incorrect results.
2686 Contained procedures could pass by value as these are never
2687 used without an explicit interface, and cannot be passed as
2688 actual parameters for a dummy procedure. */
2690 VEC_safe_push (tree, gc, typelist, type);
2694 if (sym->attr.subroutine)
2695 alternate_return = 1;
2699 /* Add hidden string length parameters. */
2700 for (f = sym->formal; f; f = f->next)
2703 if (arg && arg->ts.type == BT_CHARACTER && !sym->attr.is_bind_c)
2705 if (!arg->ts.deferred)
2706 /* Transfer by value. */
2707 type = gfc_charlen_type_node;
2709 /* Deferred character lengths are transferred by reference
2710 so that the value can be returned. */
2711 type = build_pointer_type (gfc_charlen_type_node);
2713 VEC_safe_push (tree, gc, typelist, type);
2717 if (!VEC_empty (tree, typelist)
2718 || sym->attr.is_main_program
2719 || sym->attr.if_source != IFSRC_UNKNOWN)
2722 if (alternate_return)
2723 type = integer_type_node;
2724 else if (!sym->attr.function || gfc_return_by_reference (sym))
2725 type = void_type_node;
2726 else if (sym->attr.mixed_entry_master)
2727 type = gfc_get_mixed_entry_union (sym->ns);
2728 else if (gfc_option.flag_f2c
2729 && sym->ts.type == BT_REAL
2730 && sym->ts.kind == gfc_default_real_kind
2731 && !sym->attr.always_explicit)
2733 /* Special case: f2c calling conventions require that (scalar)
2734 default REAL functions return the C type double instead. f2c
2735 compatibility is only an issue with functions that don't
2736 require an explicit interface, as only these could be
2737 implemented in Fortran 77. */
2738 sym->ts.kind = gfc_default_double_kind;
2739 type = gfc_typenode_for_spec (&sym->ts);
2740 sym->ts.kind = gfc_default_real_kind;
2742 else if (sym->result && sym->result->attr.proc_pointer)
2743 /* Procedure pointer return values. */
2745 if (sym->result->attr.result && strcmp (sym->name,"ppr@") != 0)
2747 /* Unset proc_pointer as gfc_get_function_type
2748 is called recursively. */
2749 sym->result->attr.proc_pointer = 0;
2750 type = build_pointer_type (gfc_get_function_type (sym->result));
2751 sym->result->attr.proc_pointer = 1;
2754 type = gfc_sym_type (sym->result);
2757 type = gfc_sym_type (sym);
2760 type = build_varargs_function_type_vec (type, typelist);
2762 type = build_function_type_vec (type, typelist);
2763 type = create_fn_spec (sym, type);
2768 /* Language hooks for middle-end access to type nodes. */
2770 /* Return an integer type with BITS bits of precision,
2771 that is unsigned if UNSIGNEDP is nonzero, otherwise signed. */
2774 gfc_type_for_size (unsigned bits, int unsignedp)
2779 for (i = 0; i <= MAX_INT_KINDS; ++i)
2781 tree type = gfc_integer_types[i];
2782 if (type && bits == TYPE_PRECISION (type))
2786 /* Handle TImode as a special case because it is used by some backends
2787 (e.g. ARM) even though it is not available for normal use. */
2788 #if HOST_BITS_PER_WIDE_INT >= 64
2789 if (bits == TYPE_PRECISION (intTI_type_node))
2790 return intTI_type_node;
2793 if (bits <= TYPE_PRECISION (intQI_type_node))
2794 return intQI_type_node;
2795 if (bits <= TYPE_PRECISION (intHI_type_node))
2796 return intHI_type_node;
2797 if (bits <= TYPE_PRECISION (intSI_type_node))
2798 return intSI_type_node;
2799 if (bits <= TYPE_PRECISION (intDI_type_node))
2800 return intDI_type_node;
2801 if (bits <= TYPE_PRECISION (intTI_type_node))
2802 return intTI_type_node;
2806 if (bits <= TYPE_PRECISION (unsigned_intQI_type_node))
2807 return unsigned_intQI_type_node;
2808 if (bits <= TYPE_PRECISION (unsigned_intHI_type_node))
2809 return unsigned_intHI_type_node;
2810 if (bits <= TYPE_PRECISION (unsigned_intSI_type_node))
2811 return unsigned_intSI_type_node;
2812 if (bits <= TYPE_PRECISION (unsigned_intDI_type_node))
2813 return unsigned_intDI_type_node;
2814 if (bits <= TYPE_PRECISION (unsigned_intTI_type_node))
2815 return unsigned_intTI_type_node;
2821 /* Return a data type that has machine mode MODE. If the mode is an
2822 integer, then UNSIGNEDP selects between signed and unsigned types. */
2825 gfc_type_for_mode (enum machine_mode mode, int unsignedp)
2830 if (GET_MODE_CLASS (mode) == MODE_FLOAT)
2831 base = gfc_real_types;
2832 else if (GET_MODE_CLASS (mode) == MODE_COMPLEX_FLOAT)
2833 base = gfc_complex_types;
2834 else if (SCALAR_INT_MODE_P (mode))
2836 tree type = gfc_type_for_size (GET_MODE_PRECISION (mode), unsignedp);
2837 return type != NULL_TREE && mode == TYPE_MODE (type) ? type : NULL_TREE;
2839 else if (VECTOR_MODE_P (mode))
2841 enum machine_mode inner_mode = GET_MODE_INNER (mode);
2842 tree inner_type = gfc_type_for_mode (inner_mode, unsignedp);
2843 if (inner_type != NULL_TREE)
2844 return build_vector_type_for_mode (inner_type, mode);
2850 for (i = 0; i <= MAX_REAL_KINDS; ++i)
2852 tree type = base[i];
2853 if (type && mode == TYPE_MODE (type))
2860 /* Return TRUE if TYPE is a type with a hidden descriptor, fill in INFO
2864 gfc_get_array_descr_info (const_tree type, struct array_descr_info *info)
2867 bool indirect = false;
2868 tree etype, ptype, field, t, base_decl;
2869 tree data_off, dim_off, dim_size, elem_size;
2870 tree lower_suboff, upper_suboff, stride_suboff;
2872 if (! GFC_DESCRIPTOR_TYPE_P (type))
2874 if (! POINTER_TYPE_P (type))
2876 type = TREE_TYPE (type);
2877 if (! GFC_DESCRIPTOR_TYPE_P (type))
2882 rank = GFC_TYPE_ARRAY_RANK (type);
2883 if (rank >= (int) (sizeof (info->dimen) / sizeof (info->dimen[0])))
2886 etype = GFC_TYPE_ARRAY_DATAPTR_TYPE (type);
2887 gcc_assert (POINTER_TYPE_P (etype));
2888 etype = TREE_TYPE (etype);
2890 /* If the type is not a scalar coarray. */
2891 if (TREE_CODE (etype) == ARRAY_TYPE)
2892 etype = TREE_TYPE (etype);
2894 /* Can't handle variable sized elements yet. */
2895 if (int_size_in_bytes (etype) <= 0)
2897 /* Nor non-constant lower bounds in assumed shape arrays. */
2898 if (GFC_TYPE_ARRAY_AKIND (type) == GFC_ARRAY_ASSUMED_SHAPE
2899 || GFC_TYPE_ARRAY_AKIND (type) == GFC_ARRAY_ASSUMED_SHAPE_CONT)
2901 for (dim = 0; dim < rank; dim++)
2902 if (GFC_TYPE_ARRAY_LBOUND (type, dim) == NULL_TREE
2903 || TREE_CODE (GFC_TYPE_ARRAY_LBOUND (type, dim)) != INTEGER_CST)
2907 memset (info, '\0', sizeof (*info));
2908 info->ndimensions = rank;
2909 info->element_type = etype;
2910 ptype = build_pointer_type (gfc_array_index_type);
2911 base_decl = GFC_TYPE_ARRAY_BASE_DECL (type, indirect);
2914 base_decl = build_decl (input_location, VAR_DECL, NULL_TREE,
2915 indirect ? build_pointer_type (ptype) : ptype);
2916 GFC_TYPE_ARRAY_BASE_DECL (type, indirect) = base_decl;
2918 info->base_decl = base_decl;
2920 base_decl = build1 (INDIRECT_REF, ptype, base_decl);
2922 if (GFC_TYPE_ARRAY_SPAN (type))
2923 elem_size = GFC_TYPE_ARRAY_SPAN (type);
2925 elem_size = fold_convert (gfc_array_index_type, TYPE_SIZE_UNIT (etype));
2926 field = TYPE_FIELDS (TYPE_MAIN_VARIANT (type));
2927 data_off = byte_position (field);
2928 field = DECL_CHAIN (field);
2929 field = DECL_CHAIN (field);
2930 field = DECL_CHAIN (field);
2931 dim_off = byte_position (field);
2932 dim_size = TYPE_SIZE_UNIT (TREE_TYPE (TREE_TYPE (field)));
2933 field = TYPE_FIELDS (TREE_TYPE (TREE_TYPE (field)));
2934 stride_suboff = byte_position (field);
2935 field = DECL_CHAIN (field);
2936 lower_suboff = byte_position (field);
2937 field = DECL_CHAIN (field);
2938 upper_suboff = byte_position (field);
2941 if (!integer_zerop (data_off))
2942 t = fold_build_pointer_plus (t, data_off);
2943 t = build1 (NOP_EXPR, build_pointer_type (ptr_type_node), t);
2944 info->data_location = build1 (INDIRECT_REF, ptr_type_node, t);
2945 if (GFC_TYPE_ARRAY_AKIND (type) == GFC_ARRAY_ALLOCATABLE)
2946 info->allocated = build2 (NE_EXPR, boolean_type_node,
2947 info->data_location, null_pointer_node);
2948 else if (GFC_TYPE_ARRAY_AKIND (type) == GFC_ARRAY_POINTER
2949 || GFC_TYPE_ARRAY_AKIND (type) == GFC_ARRAY_POINTER_CONT)
2950 info->associated = build2 (NE_EXPR, boolean_type_node,
2951 info->data_location, null_pointer_node);
2953 for (dim = 0; dim < rank; dim++)
2955 t = fold_build_pointer_plus (base_decl,
2956 size_binop (PLUS_EXPR,
2957 dim_off, lower_suboff));
2958 t = build1 (INDIRECT_REF, gfc_array_index_type, t);
2959 info->dimen[dim].lower_bound = t;
2960 t = fold_build_pointer_plus (base_decl,
2961 size_binop (PLUS_EXPR,
2962 dim_off, upper_suboff));
2963 t = build1 (INDIRECT_REF, gfc_array_index_type, t);
2964 info->dimen[dim].upper_bound = t;
2965 if (GFC_TYPE_ARRAY_AKIND (type) == GFC_ARRAY_ASSUMED_SHAPE
2966 || GFC_TYPE_ARRAY_AKIND (type) == GFC_ARRAY_ASSUMED_SHAPE_CONT)
2968 /* Assumed shape arrays have known lower bounds. */
2969 info->dimen[dim].upper_bound
2970 = build2 (MINUS_EXPR, gfc_array_index_type,
2971 info->dimen[dim].upper_bound,
2972 info->dimen[dim].lower_bound);
2973 info->dimen[dim].lower_bound
2974 = fold_convert (gfc_array_index_type,
2975 GFC_TYPE_ARRAY_LBOUND (type, dim));
2976 info->dimen[dim].upper_bound
2977 = build2 (PLUS_EXPR, gfc_array_index_type,
2978 info->dimen[dim].lower_bound,
2979 info->dimen[dim].upper_bound);
2981 t = fold_build_pointer_plus (base_decl,
2982 size_binop (PLUS_EXPR,
2983 dim_off, stride_suboff));
2984 t = build1 (INDIRECT_REF, gfc_array_index_type, t);
2985 t = build2 (MULT_EXPR, gfc_array_index_type, t, elem_size);
2986 info->dimen[dim].stride = t;
2987 dim_off = size_binop (PLUS_EXPR, dim_off, dim_size);
2993 #include "gt-fortran-trans-types.h"