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"
30 #include "langhooks.h" /* For iso-c-bindings.def. */
33 #include "diagnostic-core.h" /* For fatal_error. */
34 #include "toplev.h" /* For rest_of_decl_compilation. */
37 #include "trans-types.h"
38 #include "trans-const.h"
40 #include "dwarf2out.h" /* For struct array_descr_info. */
43 #if (GFC_MAX_DIMENSIONS < 10)
44 #define GFC_RANK_DIGITS 1
45 #define GFC_RANK_PRINTF_FORMAT "%01d"
46 #elif (GFC_MAX_DIMENSIONS < 100)
47 #define GFC_RANK_DIGITS 2
48 #define GFC_RANK_PRINTF_FORMAT "%02d"
50 #error If you really need >99 dimensions, continue the sequence above...
53 /* array of structs so we don't have to worry about xmalloc or free */
54 CInteropKind_t c_interop_kinds_table[ISOCBINDING_NUMBER];
56 tree gfc_array_index_type;
57 tree gfc_array_range_type;
58 tree gfc_character1_type_node;
60 tree prvoid_type_node;
61 tree ppvoid_type_node;
65 tree gfc_charlen_type_node;
67 static GTY(()) tree gfc_desc_dim_type;
68 static GTY(()) tree gfc_max_array_element_size;
69 static GTY(()) tree gfc_array_descriptor_base[2 * GFC_MAX_DIMENSIONS];
71 /* Arrays for all integral and real kinds. We'll fill this in at runtime
72 after the target has a chance to process command-line options. */
74 #define MAX_INT_KINDS 5
75 gfc_integer_info gfc_integer_kinds[MAX_INT_KINDS + 1];
76 gfc_logical_info gfc_logical_kinds[MAX_INT_KINDS + 1];
77 static GTY(()) tree gfc_integer_types[MAX_INT_KINDS + 1];
78 static GTY(()) tree gfc_logical_types[MAX_INT_KINDS + 1];
80 #define MAX_REAL_KINDS 5
81 gfc_real_info gfc_real_kinds[MAX_REAL_KINDS + 1];
82 static GTY(()) tree gfc_real_types[MAX_REAL_KINDS + 1];
83 static GTY(()) tree gfc_complex_types[MAX_REAL_KINDS + 1];
85 #define MAX_CHARACTER_KINDS 2
86 gfc_character_info gfc_character_kinds[MAX_CHARACTER_KINDS + 1];
87 static GTY(()) tree gfc_character_types[MAX_CHARACTER_KINDS + 1];
88 static GTY(()) tree gfc_pcharacter_types[MAX_CHARACTER_KINDS + 1];
90 static tree gfc_add_field_to_struct_1 (tree, tree, tree, tree **);
92 /* The integer kind to use for array indices. This will be set to the
93 proper value based on target information from the backend. */
95 int gfc_index_integer_kind;
97 /* The default kinds of the various types. */
99 int gfc_default_integer_kind;
100 int gfc_max_integer_kind;
101 int gfc_default_real_kind;
102 int gfc_default_double_kind;
103 int gfc_default_character_kind;
104 int gfc_default_logical_kind;
105 int gfc_default_complex_kind;
108 /* The kind size used for record offsets. If the target system supports
109 kind=8, this will be set to 8, otherwise it is set to 4. */
112 /* The integer kind used to store character lengths. */
113 int gfc_charlen_int_kind;
115 /* The size of the numeric storage unit and character storage unit. */
116 int gfc_numeric_storage_size;
117 int gfc_character_storage_size;
121 gfc_check_any_c_kind (gfc_typespec *ts)
125 for (i = 0; i < ISOCBINDING_NUMBER; i++)
127 /* Check for any C interoperable kind for the given type/kind in ts.
128 This can be used after verify_c_interop to make sure that the
129 Fortran kind being used exists in at least some form for C. */
130 if (c_interop_kinds_table[i].f90_type == ts->type &&
131 c_interop_kinds_table[i].value == ts->kind)
140 get_real_kind_from_node (tree type)
144 for (i = 0; gfc_real_kinds[i].kind != 0; i++)
145 if (gfc_real_kinds[i].mode_precision == TYPE_PRECISION (type))
146 return gfc_real_kinds[i].kind;
152 get_int_kind_from_node (tree type)
159 for (i = 0; gfc_integer_kinds[i].kind != 0; i++)
160 if (gfc_integer_kinds[i].bit_size == TYPE_PRECISION (type))
161 return gfc_integer_kinds[i].kind;
166 /* Return a typenode for the "standard" C type with a given name. */
168 get_typenode_from_name (const char *name)
170 if (name == NULL || *name == '\0')
173 if (strcmp (name, "char") == 0)
174 return char_type_node;
175 if (strcmp (name, "unsigned char") == 0)
176 return unsigned_char_type_node;
177 if (strcmp (name, "signed char") == 0)
178 return signed_char_type_node;
180 if (strcmp (name, "short int") == 0)
181 return short_integer_type_node;
182 if (strcmp (name, "short unsigned int") == 0)
183 return short_unsigned_type_node;
185 if (strcmp (name, "int") == 0)
186 return integer_type_node;
187 if (strcmp (name, "unsigned int") == 0)
188 return unsigned_type_node;
190 if (strcmp (name, "long int") == 0)
191 return long_integer_type_node;
192 if (strcmp (name, "long unsigned int") == 0)
193 return long_unsigned_type_node;
195 if (strcmp (name, "long long int") == 0)
196 return long_long_integer_type_node;
197 if (strcmp (name, "long long unsigned int") == 0)
198 return long_long_unsigned_type_node;
204 get_int_kind_from_name (const char *name)
206 return get_int_kind_from_node (get_typenode_from_name (name));
210 /* Get the kind number corresponding to an integer of given size,
211 following the required return values for ISO_FORTRAN_ENV INT* constants:
212 -2 is returned if we support a kind of larger size, -1 otherwise. */
214 gfc_get_int_kind_from_width_isofortranenv (int size)
218 /* Look for a kind with matching storage size. */
219 for (i = 0; gfc_integer_kinds[i].kind != 0; i++)
220 if (gfc_integer_kinds[i].bit_size == size)
221 return gfc_integer_kinds[i].kind;
223 /* Look for a kind with larger storage size. */
224 for (i = 0; gfc_integer_kinds[i].kind != 0; i++)
225 if (gfc_integer_kinds[i].bit_size > size)
231 /* Get the kind number corresponding to a real of given storage size,
232 following the required return values for ISO_FORTRAN_ENV REAL* constants:
233 -2 is returned if we support a kind of larger size, -1 otherwise. */
235 gfc_get_real_kind_from_width_isofortranenv (int size)
241 /* Look for a kind with matching storage size. */
242 for (i = 0; gfc_real_kinds[i].kind != 0; i++)
243 if (int_size_in_bytes (gfc_get_real_type (gfc_real_kinds[i].kind)) == size)
244 return gfc_real_kinds[i].kind;
246 /* Look for a kind with larger storage size. */
247 for (i = 0; gfc_real_kinds[i].kind != 0; i++)
248 if (int_size_in_bytes (gfc_get_real_type (gfc_real_kinds[i].kind)) > size)
257 get_int_kind_from_width (int size)
261 for (i = 0; gfc_integer_kinds[i].kind != 0; i++)
262 if (gfc_integer_kinds[i].bit_size == size)
263 return gfc_integer_kinds[i].kind;
269 get_int_kind_from_minimal_width (int size)
273 for (i = 0; gfc_integer_kinds[i].kind != 0; i++)
274 if (gfc_integer_kinds[i].bit_size >= size)
275 return gfc_integer_kinds[i].kind;
281 /* Generate the CInteropKind_t objects for the C interoperable
285 void init_c_interop_kinds (void)
289 /* init all pointers in the list to NULL */
290 for (i = 0; i < ISOCBINDING_NUMBER; i++)
292 /* Initialize the name and value fields. */
293 c_interop_kinds_table[i].name[0] = '\0';
294 c_interop_kinds_table[i].value = -100;
295 c_interop_kinds_table[i].f90_type = BT_UNKNOWN;
298 #define NAMED_INTCST(a,b,c,d) \
299 strncpy (c_interop_kinds_table[a].name, b, strlen(b) + 1); \
300 c_interop_kinds_table[a].f90_type = BT_INTEGER; \
301 c_interop_kinds_table[a].value = c;
302 #define NAMED_REALCST(a,b,c) \
303 strncpy (c_interop_kinds_table[a].name, b, strlen(b) + 1); \
304 c_interop_kinds_table[a].f90_type = BT_REAL; \
305 c_interop_kinds_table[a].value = c;
306 #define NAMED_CMPXCST(a,b,c) \
307 strncpy (c_interop_kinds_table[a].name, b, strlen(b) + 1); \
308 c_interop_kinds_table[a].f90_type = BT_COMPLEX; \
309 c_interop_kinds_table[a].value = c;
310 #define NAMED_LOGCST(a,b,c) \
311 strncpy (c_interop_kinds_table[a].name, b, strlen(b) + 1); \
312 c_interop_kinds_table[a].f90_type = BT_LOGICAL; \
313 c_interop_kinds_table[a].value = c;
314 #define NAMED_CHARKNDCST(a,b,c) \
315 strncpy (c_interop_kinds_table[a].name, b, strlen(b) + 1); \
316 c_interop_kinds_table[a].f90_type = BT_CHARACTER; \
317 c_interop_kinds_table[a].value = c;
318 #define NAMED_CHARCST(a,b,c) \
319 strncpy (c_interop_kinds_table[a].name, b, strlen(b) + 1); \
320 c_interop_kinds_table[a].f90_type = BT_CHARACTER; \
321 c_interop_kinds_table[a].value = c;
322 #define DERIVED_TYPE(a,b,c) \
323 strncpy (c_interop_kinds_table[a].name, b, strlen(b) + 1); \
324 c_interop_kinds_table[a].f90_type = BT_DERIVED; \
325 c_interop_kinds_table[a].value = c;
326 #define PROCEDURE(a,b) \
327 strncpy (c_interop_kinds_table[a].name, b, strlen(b) + 1); \
328 c_interop_kinds_table[a].f90_type = BT_PROCEDURE; \
329 c_interop_kinds_table[a].value = 0;
330 #include "iso-c-binding.def"
334 /* Query the target to determine which machine modes are available for
335 computation. Choose KIND numbers for them. */
338 gfc_init_kinds (void)
341 int i_index, r_index, kind;
342 bool saw_i4 = false, saw_i8 = false;
343 bool saw_r4 = false, saw_r8 = false, saw_r16 = false;
345 for (i_index = 0, mode = MIN_MODE_INT; mode <= MAX_MODE_INT; mode++)
349 if (!targetm.scalar_mode_supported_p ((enum machine_mode) mode))
352 /* The middle end doesn't support constants larger than 2*HWI.
353 Perhaps the target hook shouldn't have accepted these either,
354 but just to be safe... */
355 bitsize = GET_MODE_BITSIZE (mode);
356 if (bitsize > 2*HOST_BITS_PER_WIDE_INT)
359 gcc_assert (i_index != MAX_INT_KINDS);
361 /* Let the kind equal the bit size divided by 8. This insulates the
362 programmer from the underlying byte size. */
370 gfc_integer_kinds[i_index].kind = kind;
371 gfc_integer_kinds[i_index].radix = 2;
372 gfc_integer_kinds[i_index].digits = bitsize - 1;
373 gfc_integer_kinds[i_index].bit_size = bitsize;
375 gfc_logical_kinds[i_index].kind = kind;
376 gfc_logical_kinds[i_index].bit_size = bitsize;
381 /* Set the kind used to match GFC_INT_IO in libgfortran. This is
382 used for large file access. */
389 /* If we do not at least have kind = 4, everything is pointless. */
392 /* Set the maximum integer kind. Used with at least BOZ constants. */
393 gfc_max_integer_kind = gfc_integer_kinds[i_index - 1].kind;
395 for (r_index = 0, mode = MIN_MODE_FLOAT; mode <= MAX_MODE_FLOAT; mode++)
397 const struct real_format *fmt =
398 REAL_MODE_FORMAT ((enum machine_mode) mode);
403 if (!targetm.scalar_mode_supported_p ((enum machine_mode) mode))
406 /* Only let float/double/long double go through because the fortran
407 library assumes these are the only floating point types. */
409 if (mode != TYPE_MODE (float_type_node)
410 && (mode != TYPE_MODE (double_type_node))
411 && (mode != TYPE_MODE (long_double_type_node)))
414 /* Let the kind equal the precision divided by 8, rounding up. Again,
415 this insulates the programmer from the underlying byte size.
417 Also, it effectively deals with IEEE extended formats. There, the
418 total size of the type may equal 16, but it's got 6 bytes of padding
419 and the increased size can get in the way of a real IEEE quad format
420 which may also be supported by the target.
422 We round up so as to handle IA-64 __floatreg (RFmode), which is an
423 82 bit type. Not to be confused with __float80 (XFmode), which is
424 an 80 bit type also supported by IA-64. So XFmode should come out
425 to be kind=10, and RFmode should come out to be kind=11. Egads. */
427 kind = (GET_MODE_PRECISION (mode) + 7) / 8;
436 /* Careful we don't stumble a weird internal mode. */
437 gcc_assert (r_index <= 0 || gfc_real_kinds[r_index-1].kind != kind);
438 /* Or have too many modes for the allocated space. */
439 gcc_assert (r_index != MAX_REAL_KINDS);
441 gfc_real_kinds[r_index].kind = kind;
442 gfc_real_kinds[r_index].radix = fmt->b;
443 gfc_real_kinds[r_index].digits = fmt->p;
444 gfc_real_kinds[r_index].min_exponent = fmt->emin;
445 gfc_real_kinds[r_index].max_exponent = fmt->emax;
446 if (fmt->pnan < fmt->p)
447 /* This is an IBM extended double format (or the MIPS variant)
448 made up of two IEEE doubles. The value of the long double is
449 the sum of the values of the two parts. The most significant
450 part is required to be the value of the long double rounded
451 to the nearest double. If we use emax of 1024 then we can't
452 represent huge(x) = (1 - b**(-p)) * b**(emax-1) * b, because
453 rounding will make the most significant part overflow. */
454 gfc_real_kinds[r_index].max_exponent = fmt->emax - 1;
455 gfc_real_kinds[r_index].mode_precision = GET_MODE_PRECISION (mode);
459 /* Choose the default integer kind. We choose 4 unless the user
460 directs us otherwise. */
461 if (gfc_option.flag_default_integer)
464 fatal_error ("integer kind=8 not available for -fdefault-integer-8 option");
465 gfc_default_integer_kind = 8;
467 /* Even if the user specified that the default integer kind be 8,
468 the numeric storage size isn't 64. In this case, a warning will
469 be issued when NUMERIC_STORAGE_SIZE is used. */
470 gfc_numeric_storage_size = 4 * 8;
474 gfc_default_integer_kind = 4;
475 gfc_numeric_storage_size = 4 * 8;
479 gfc_default_integer_kind = gfc_integer_kinds[i_index - 1].kind;
480 gfc_numeric_storage_size = gfc_integer_kinds[i_index - 1].bit_size;
483 /* Choose the default real kind. Again, we choose 4 when possible. */
484 if (gfc_option.flag_default_real)
487 fatal_error ("real kind=8 not available for -fdefault-real-8 option");
488 gfc_default_real_kind = 8;
491 gfc_default_real_kind = 4;
493 gfc_default_real_kind = gfc_real_kinds[0].kind;
495 /* Choose the default double kind. If -fdefault-real and -fdefault-double
496 are specified, we use kind=8, if it's available. If -fdefault-real is
497 specified without -fdefault-double, we use kind=16, if it's available.
498 Otherwise we do not change anything. */
499 if (gfc_option.flag_default_double && !gfc_option.flag_default_real)
500 fatal_error ("Use of -fdefault-double-8 requires -fdefault-real-8");
502 if (gfc_option.flag_default_real && gfc_option.flag_default_double && saw_r8)
503 gfc_default_double_kind = 8;
504 else if (gfc_option.flag_default_real && saw_r16)
505 gfc_default_double_kind = 16;
506 else if (saw_r4 && saw_r8)
507 gfc_default_double_kind = 8;
510 /* F95 14.6.3.1: A nonpointer scalar object of type double precision
511 real ... occupies two contiguous numeric storage units.
513 Therefore we must be supplied a kind twice as large as we chose
514 for single precision. There are loopholes, in that double
515 precision must *occupy* two storage units, though it doesn't have
516 to *use* two storage units. Which means that you can make this
517 kind artificially wide by padding it. But at present there are
518 no GCC targets for which a two-word type does not exist, so we
519 just let gfc_validate_kind abort and tell us if something breaks. */
521 gfc_default_double_kind
522 = gfc_validate_kind (BT_REAL, gfc_default_real_kind * 2, false);
525 /* The default logical kind is constrained to be the same as the
526 default integer kind. Similarly with complex and real. */
527 gfc_default_logical_kind = gfc_default_integer_kind;
528 gfc_default_complex_kind = gfc_default_real_kind;
530 /* We only have two character kinds: ASCII and UCS-4.
531 ASCII corresponds to a 8-bit integer type, if one is available.
532 UCS-4 corresponds to a 32-bit integer type, if one is available. */
534 if ((kind = get_int_kind_from_width (8)) > 0)
536 gfc_character_kinds[i_index].kind = kind;
537 gfc_character_kinds[i_index].bit_size = 8;
538 gfc_character_kinds[i_index].name = "ascii";
541 if ((kind = get_int_kind_from_width (32)) > 0)
543 gfc_character_kinds[i_index].kind = kind;
544 gfc_character_kinds[i_index].bit_size = 32;
545 gfc_character_kinds[i_index].name = "iso_10646";
549 /* Choose the smallest integer kind for our default character. */
550 gfc_default_character_kind = gfc_character_kinds[0].kind;
551 gfc_character_storage_size = gfc_default_character_kind * 8;
553 /* Choose the integer kind the same size as "void*" for our index kind. */
554 gfc_index_integer_kind = POINTER_SIZE / 8;
555 /* Pick a kind the same size as the C "int" type. */
556 gfc_c_int_kind = INT_TYPE_SIZE / 8;
558 /* initialize the C interoperable kinds */
559 init_c_interop_kinds();
562 /* Make sure that a valid kind is present. Returns an index into the
563 associated kinds array, -1 if the kind is not present. */
566 validate_integer (int kind)
570 for (i = 0; gfc_integer_kinds[i].kind != 0; i++)
571 if (gfc_integer_kinds[i].kind == kind)
578 validate_real (int kind)
582 for (i = 0; gfc_real_kinds[i].kind != 0; i++)
583 if (gfc_real_kinds[i].kind == kind)
590 validate_logical (int kind)
594 for (i = 0; gfc_logical_kinds[i].kind; i++)
595 if (gfc_logical_kinds[i].kind == kind)
602 validate_character (int kind)
606 for (i = 0; gfc_character_kinds[i].kind; i++)
607 if (gfc_character_kinds[i].kind == kind)
613 /* Validate a kind given a basic type. The return value is the same
614 for the child functions, with -1 indicating nonexistence of the
615 type. If MAY_FAIL is false, then -1 is never returned, and we ICE. */
618 gfc_validate_kind (bt type, int kind, bool may_fail)
624 case BT_REAL: /* Fall through */
626 rc = validate_real (kind);
629 rc = validate_integer (kind);
632 rc = validate_logical (kind);
635 rc = validate_character (kind);
639 gfc_internal_error ("gfc_validate_kind(): Got bad type");
642 if (rc < 0 && !may_fail)
643 gfc_internal_error ("gfc_validate_kind(): Got bad kind");
649 /* Four subroutines of gfc_init_types. Create type nodes for the given kind.
650 Reuse common type nodes where possible. Recognize if the kind matches up
651 with a C type. This will be used later in determining which routines may
652 be scarfed from libm. */
655 gfc_build_int_type (gfc_integer_info *info)
657 int mode_precision = info->bit_size;
659 if (mode_precision == CHAR_TYPE_SIZE)
661 if (mode_precision == SHORT_TYPE_SIZE)
663 if (mode_precision == INT_TYPE_SIZE)
665 if (mode_precision == LONG_TYPE_SIZE)
667 if (mode_precision == LONG_LONG_TYPE_SIZE)
668 info->c_long_long = 1;
670 if (TYPE_PRECISION (intQI_type_node) == mode_precision)
671 return intQI_type_node;
672 if (TYPE_PRECISION (intHI_type_node) == mode_precision)
673 return intHI_type_node;
674 if (TYPE_PRECISION (intSI_type_node) == mode_precision)
675 return intSI_type_node;
676 if (TYPE_PRECISION (intDI_type_node) == mode_precision)
677 return intDI_type_node;
678 if (TYPE_PRECISION (intTI_type_node) == mode_precision)
679 return intTI_type_node;
681 return make_signed_type (mode_precision);
685 gfc_build_uint_type (int size)
687 if (size == CHAR_TYPE_SIZE)
688 return unsigned_char_type_node;
689 if (size == SHORT_TYPE_SIZE)
690 return short_unsigned_type_node;
691 if (size == INT_TYPE_SIZE)
692 return unsigned_type_node;
693 if (size == LONG_TYPE_SIZE)
694 return long_unsigned_type_node;
695 if (size == LONG_LONG_TYPE_SIZE)
696 return long_long_unsigned_type_node;
698 return make_unsigned_type (size);
703 gfc_build_real_type (gfc_real_info *info)
705 int mode_precision = info->mode_precision;
708 if (mode_precision == FLOAT_TYPE_SIZE)
710 if (mode_precision == DOUBLE_TYPE_SIZE)
712 if (mode_precision == LONG_DOUBLE_TYPE_SIZE)
713 info->c_long_double = 1;
715 if (TYPE_PRECISION (float_type_node) == mode_precision)
716 return float_type_node;
717 if (TYPE_PRECISION (double_type_node) == mode_precision)
718 return double_type_node;
719 if (TYPE_PRECISION (long_double_type_node) == mode_precision)
720 return long_double_type_node;
722 new_type = make_node (REAL_TYPE);
723 TYPE_PRECISION (new_type) = mode_precision;
724 layout_type (new_type);
729 gfc_build_complex_type (tree scalar_type)
733 if (scalar_type == NULL)
735 if (scalar_type == float_type_node)
736 return complex_float_type_node;
737 if (scalar_type == double_type_node)
738 return complex_double_type_node;
739 if (scalar_type == long_double_type_node)
740 return complex_long_double_type_node;
742 new_type = make_node (COMPLEX_TYPE);
743 TREE_TYPE (new_type) = scalar_type;
744 layout_type (new_type);
749 gfc_build_logical_type (gfc_logical_info *info)
751 int bit_size = info->bit_size;
754 if (bit_size == BOOL_TYPE_SIZE)
757 return boolean_type_node;
760 new_type = make_unsigned_type (bit_size);
761 TREE_SET_CODE (new_type, BOOLEAN_TYPE);
762 TYPE_MAX_VALUE (new_type) = build_int_cst (new_type, 1);
763 TYPE_PRECISION (new_type) = 1;
770 /* Return the bit size of the C "size_t". */
776 if (strcmp (SIZE_TYPE, "unsigned int") == 0)
777 return INT_TYPE_SIZE;
778 if (strcmp (SIZE_TYPE, "long unsigned int") == 0)
779 return LONG_TYPE_SIZE;
780 if (strcmp (SIZE_TYPE, "short unsigned int") == 0)
781 return SHORT_TYPE_SIZE;
784 return LONG_TYPE_SIZE;
789 /* Create the backend type nodes. We map them to their
790 equivalent C type, at least for now. We also give
791 names to the types here, and we push them in the
792 global binding level context.*/
795 gfc_init_types (void)
801 unsigned HOST_WIDE_INT hi;
802 unsigned HOST_WIDE_INT lo;
804 /* Create and name the types. */
805 #define PUSH_TYPE(name, node) \
806 pushdecl (build_decl (input_location, \
807 TYPE_DECL, get_identifier (name), node))
809 for (index = 0; gfc_integer_kinds[index].kind != 0; ++index)
811 type = gfc_build_int_type (&gfc_integer_kinds[index]);
812 /* Ensure integer(kind=1) doesn't have TYPE_STRING_FLAG set. */
813 if (TYPE_STRING_FLAG (type))
814 type = make_signed_type (gfc_integer_kinds[index].bit_size);
815 gfc_integer_types[index] = type;
816 snprintf (name_buf, sizeof(name_buf), "integer(kind=%d)",
817 gfc_integer_kinds[index].kind);
818 PUSH_TYPE (name_buf, type);
821 for (index = 0; gfc_logical_kinds[index].kind != 0; ++index)
823 type = gfc_build_logical_type (&gfc_logical_kinds[index]);
824 gfc_logical_types[index] = type;
825 snprintf (name_buf, sizeof(name_buf), "logical(kind=%d)",
826 gfc_logical_kinds[index].kind);
827 PUSH_TYPE (name_buf, type);
830 for (index = 0; gfc_real_kinds[index].kind != 0; index++)
832 type = gfc_build_real_type (&gfc_real_kinds[index]);
833 gfc_real_types[index] = type;
834 snprintf (name_buf, sizeof(name_buf), "real(kind=%d)",
835 gfc_real_kinds[index].kind);
836 PUSH_TYPE (name_buf, type);
838 type = gfc_build_complex_type (type);
839 gfc_complex_types[index] = type;
840 snprintf (name_buf, sizeof(name_buf), "complex(kind=%d)",
841 gfc_real_kinds[index].kind);
842 PUSH_TYPE (name_buf, type);
845 for (index = 0; gfc_character_kinds[index].kind != 0; ++index)
847 type = gfc_build_uint_type (gfc_character_kinds[index].bit_size);
848 type = build_qualified_type (type, TYPE_UNQUALIFIED);
849 snprintf (name_buf, sizeof(name_buf), "character(kind=%d)",
850 gfc_character_kinds[index].kind);
851 PUSH_TYPE (name_buf, type);
852 gfc_character_types[index] = type;
853 gfc_pcharacter_types[index] = build_pointer_type (type);
855 gfc_character1_type_node = gfc_character_types[0];
857 PUSH_TYPE ("byte", unsigned_char_type_node);
858 PUSH_TYPE ("void", void_type_node);
860 /* DBX debugging output gets upset if these aren't set. */
861 if (!TYPE_NAME (integer_type_node))
862 PUSH_TYPE ("c_integer", integer_type_node);
863 if (!TYPE_NAME (char_type_node))
864 PUSH_TYPE ("c_char", char_type_node);
868 pvoid_type_node = build_pointer_type (void_type_node);
869 prvoid_type_node = build_qualified_type (pvoid_type_node, TYPE_QUAL_RESTRICT);
870 ppvoid_type_node = build_pointer_type (pvoid_type_node);
871 pchar_type_node = build_pointer_type (gfc_character1_type_node);
873 = build_pointer_type (build_function_type_list (void_type_node, NULL_TREE));
875 gfc_array_index_type = gfc_get_int_type (gfc_index_integer_kind);
876 /* We cannot use gfc_index_zero_node in definition of gfc_array_range_type,
877 since this function is called before gfc_init_constants. */
879 = build_range_type (gfc_array_index_type,
880 build_int_cst (gfc_array_index_type, 0),
883 /* The maximum array element size that can be handled is determined
884 by the number of bits available to store this field in the array
887 n = TYPE_PRECISION (gfc_array_index_type) - GFC_DTYPE_SIZE_SHIFT;
888 lo = ~ (unsigned HOST_WIDE_INT) 0;
889 if (n > HOST_BITS_PER_WIDE_INT)
890 hi = lo >> (2*HOST_BITS_PER_WIDE_INT - n);
892 hi = 0, lo >>= HOST_BITS_PER_WIDE_INT - n;
893 gfc_max_array_element_size
894 = build_int_cst_wide (long_unsigned_type_node, lo, hi);
896 size_type_node = gfc_array_index_type;
898 boolean_type_node = gfc_get_logical_type (gfc_default_logical_kind);
899 boolean_true_node = build_int_cst (boolean_type_node, 1);
900 boolean_false_node = build_int_cst (boolean_type_node, 0);
902 /* ??? Shouldn't this be based on gfc_index_integer_kind or so? */
903 gfc_charlen_int_kind = 4;
904 gfc_charlen_type_node = gfc_get_int_type (gfc_charlen_int_kind);
907 /* Get the type node for the given type and kind. */
910 gfc_get_int_type (int kind)
912 int index = gfc_validate_kind (BT_INTEGER, kind, true);
913 return index < 0 ? 0 : gfc_integer_types[index];
917 gfc_get_real_type (int kind)
919 int index = gfc_validate_kind (BT_REAL, kind, true);
920 return index < 0 ? 0 : gfc_real_types[index];
924 gfc_get_complex_type (int kind)
926 int index = gfc_validate_kind (BT_COMPLEX, kind, true);
927 return index < 0 ? 0 : gfc_complex_types[index];
931 gfc_get_logical_type (int kind)
933 int index = gfc_validate_kind (BT_LOGICAL, kind, true);
934 return index < 0 ? 0 : gfc_logical_types[index];
938 gfc_get_char_type (int kind)
940 int index = gfc_validate_kind (BT_CHARACTER, kind, true);
941 return index < 0 ? 0 : gfc_character_types[index];
945 gfc_get_pchar_type (int kind)
947 int index = gfc_validate_kind (BT_CHARACTER, kind, true);
948 return index < 0 ? 0 : gfc_pcharacter_types[index];
952 /* Create a character type with the given kind and length. */
955 gfc_get_character_type_len_for_eltype (tree eltype, tree len)
959 bounds = build_range_type (gfc_charlen_type_node, gfc_index_one_node, len);
960 type = build_array_type (eltype, bounds);
961 TYPE_STRING_FLAG (type) = 1;
967 gfc_get_character_type_len (int kind, tree len)
969 gfc_validate_kind (BT_CHARACTER, kind, false);
970 return gfc_get_character_type_len_for_eltype (gfc_get_char_type (kind), len);
974 /* Get a type node for a character kind. */
977 gfc_get_character_type (int kind, gfc_charlen * cl)
981 len = (cl == NULL) ? NULL_TREE : cl->backend_decl;
983 return gfc_get_character_type_len (kind, len);
986 /* Covert a basic type. This will be an array for character types. */
989 gfc_typenode_for_spec (gfc_typespec * spec)
999 /* We use INTEGER(c_intptr_t) for C_PTR and C_FUNPTR once the symbol
1000 has been resolved. This is done so we can convert C_PTR and
1001 C_FUNPTR to simple variables that get translated to (void *). */
1002 if (spec->f90_type == BT_VOID)
1005 && spec->u.derived->intmod_sym_id == ISOCBINDING_PTR)
1006 basetype = ptr_type_node;
1008 basetype = pfunc_type_node;
1011 basetype = gfc_get_int_type (spec->kind);
1015 basetype = gfc_get_real_type (spec->kind);
1019 basetype = gfc_get_complex_type (spec->kind);
1023 basetype = gfc_get_logical_type (spec->kind);
1027 basetype = gfc_get_character_type (spec->kind, spec->u.cl);
1032 basetype = gfc_get_derived_type (spec->u.derived);
1034 /* If we're dealing with either C_PTR or C_FUNPTR, we modified the
1035 type and kind to fit a (void *) and the basetype returned was a
1036 ptr_type_node. We need to pass up this new information to the
1037 symbol that was declared of type C_PTR or C_FUNPTR. */
1038 if (spec->u.derived->attr.is_iso_c)
1040 spec->type = spec->u.derived->ts.type;
1041 spec->kind = spec->u.derived->ts.kind;
1042 spec->f90_type = spec->u.derived->ts.f90_type;
1046 /* This is for the second arg to c_f_pointer and c_f_procpointer
1047 of the iso_c_binding module, to accept any ptr type. */
1048 basetype = ptr_type_node;
1049 if (spec->f90_type == BT_VOID)
1052 && spec->u.derived->intmod_sym_id == ISOCBINDING_PTR)
1053 basetype = ptr_type_node;
1055 basetype = pfunc_type_node;
1064 /* Build an INT_CST for constant expressions, otherwise return NULL_TREE. */
1067 gfc_conv_array_bound (gfc_expr * expr)
1069 /* If expr is an integer constant, return that. */
1070 if (expr != NULL && expr->expr_type == EXPR_CONSTANT)
1071 return gfc_conv_mpz_to_tree (expr->value.integer, gfc_index_integer_kind);
1073 /* Otherwise return NULL. */
1078 gfc_get_element_type (tree type)
1082 if (GFC_ARRAY_TYPE_P (type))
1084 if (TREE_CODE (type) == POINTER_TYPE)
1085 type = TREE_TYPE (type);
1086 gcc_assert (TREE_CODE (type) == ARRAY_TYPE);
1087 element = TREE_TYPE (type);
1091 gcc_assert (GFC_DESCRIPTOR_TYPE_P (type));
1092 element = GFC_TYPE_ARRAY_DATAPTR_TYPE (type);
1094 gcc_assert (TREE_CODE (element) == POINTER_TYPE);
1095 element = TREE_TYPE (element);
1097 gcc_assert (TREE_CODE (element) == ARRAY_TYPE);
1098 element = TREE_TYPE (element);
1104 /* Build an array. This function is called from gfc_sym_type().
1105 Actually returns array descriptor type.
1107 Format of array descriptors is as follows:
1109 struct gfc_array_descriptor
1114 struct descriptor_dimension dimension[N_DIM];
1117 struct descriptor_dimension
1124 Translation code should use gfc_conv_descriptor_* rather than
1125 accessing the descriptor directly. Any changes to the array
1126 descriptor type will require changes in gfc_conv_descriptor_* and
1127 gfc_build_array_initializer.
1129 This is represented internally as a RECORD_TYPE. The index nodes
1130 are gfc_array_index_type and the data node is a pointer to the
1131 data. See below for the handling of character types.
1133 The dtype member is formatted as follows:
1134 rank = dtype & GFC_DTYPE_RANK_MASK // 3 bits
1135 type = (dtype & GFC_DTYPE_TYPE_MASK) >> GFC_DTYPE_TYPE_SHIFT // 3 bits
1136 size = dtype >> GFC_DTYPE_SIZE_SHIFT
1138 I originally used nested ARRAY_TYPE nodes to represent arrays, but
1139 this generated poor code for assumed/deferred size arrays. These
1140 require use of PLACEHOLDER_EXPR/WITH_RECORD_EXPR, which isn't part
1141 of the GENERIC grammar. Also, there is no way to explicitly set
1142 the array stride, so all data must be packed(1). I've tried to
1143 mark all the functions which would require modification with a GCC
1146 The data component points to the first element in the array. The
1147 offset field is the position of the origin of the array (i.e. element
1148 (0, 0 ...)). This may be outside the bounds of the array.
1150 An element is accessed by
1151 data[offset + index0*stride0 + index1*stride1 + index2*stride2]
1152 This gives good performance as the computation does not involve the
1153 bounds of the array. For packed arrays, this is optimized further
1154 by substituting the known strides.
1156 This system has one problem: all array bounds must be within 2^31
1157 elements of the origin (2^63 on 64-bit machines). For example
1158 integer, dimension (80000:90000, 80000:90000, 2) :: array
1159 may not work properly on 32-bit machines because 80000*80000 >
1160 2^31, so the calculation for stride2 would overflow. This may
1161 still work, but I haven't checked, and it relies on the overflow
1162 doing the right thing.
1164 The way to fix this problem is to access elements as follows:
1165 data[(index0-lbound0)*stride0 + (index1-lbound1)*stride1]
1166 Obviously this is much slower. I will make this a compile time
1167 option, something like -fsmall-array-offsets. Mixing code compiled
1168 with and without this switch will work.
1170 (1) This can be worked around by modifying the upper bound of the
1171 previous dimension. This requires extra fields in the descriptor
1172 (both real_ubound and fake_ubound). */
1175 /* Returns true if the array sym does not require a descriptor. */
1178 gfc_is_nodesc_array (gfc_symbol * sym)
1180 gcc_assert (sym->attr.dimension);
1182 /* We only want local arrays. */
1183 if (sym->attr.pointer || sym->attr.allocatable)
1186 /* We want a descriptor for associate-name arrays that do not have an
1187 explicitely known shape already. */
1188 if (sym->assoc && sym->as->type != AS_EXPLICIT)
1191 if (sym->attr.dummy)
1192 return sym->as->type != AS_ASSUMED_SHAPE;
1194 if (sym->attr.result || sym->attr.function)
1197 gcc_assert (sym->as->type == AS_EXPLICIT || sym->as->cp_was_assumed);
1203 /* Create an array descriptor type. */
1206 gfc_build_array_type (tree type, gfc_array_spec * as,
1207 enum gfc_array_kind akind, bool restricted,
1210 tree lbound[GFC_MAX_DIMENSIONS];
1211 tree ubound[GFC_MAX_DIMENSIONS];
1214 for (n = 0; n < as->rank; n++)
1216 /* Create expressions for the known bounds of the array. */
1217 if (as->type == AS_ASSUMED_SHAPE && as->lower[n] == NULL)
1218 lbound[n] = gfc_index_one_node;
1220 lbound[n] = gfc_conv_array_bound (as->lower[n]);
1221 ubound[n] = gfc_conv_array_bound (as->upper[n]);
1224 if (as->type == AS_ASSUMED_SHAPE)
1225 akind = contiguous ? GFC_ARRAY_ASSUMED_SHAPE_CONT
1226 : GFC_ARRAY_ASSUMED_SHAPE;
1227 return gfc_get_array_type_bounds (type, as->rank, as->corank, lbound,
1228 ubound, 0, akind, restricted);
1231 /* Returns the struct descriptor_dimension type. */
1234 gfc_get_desc_dim_type (void)
1237 tree decl, *chain = NULL;
1239 if (gfc_desc_dim_type)
1240 return gfc_desc_dim_type;
1242 /* Build the type node. */
1243 type = make_node (RECORD_TYPE);
1245 TYPE_NAME (type) = get_identifier ("descriptor_dimension");
1246 TYPE_PACKED (type) = 1;
1248 /* Consists of the stride, lbound and ubound members. */
1249 decl = gfc_add_field_to_struct_1 (type,
1250 get_identifier ("stride"),
1251 gfc_array_index_type, &chain);
1252 TREE_NO_WARNING (decl) = 1;
1254 decl = gfc_add_field_to_struct_1 (type,
1255 get_identifier ("lbound"),
1256 gfc_array_index_type, &chain);
1257 TREE_NO_WARNING (decl) = 1;
1259 decl = gfc_add_field_to_struct_1 (type,
1260 get_identifier ("ubound"),
1261 gfc_array_index_type, &chain);
1262 TREE_NO_WARNING (decl) = 1;
1264 /* Finish off the type. */
1265 gfc_finish_type (type);
1266 TYPE_DECL_SUPPRESS_DEBUG (TYPE_STUB_DECL (type)) = 1;
1268 gfc_desc_dim_type = type;
1273 /* Return the DTYPE for an array. This describes the type and type parameters
1275 /* TODO: Only call this when the value is actually used, and make all the
1276 unknown cases abort. */
1279 gfc_get_dtype (tree type)
1289 gcc_assert (GFC_DESCRIPTOR_TYPE_P (type) || GFC_ARRAY_TYPE_P (type));
1291 if (GFC_TYPE_ARRAY_DTYPE (type))
1292 return GFC_TYPE_ARRAY_DTYPE (type);
1294 rank = GFC_TYPE_ARRAY_RANK (type);
1295 etype = gfc_get_element_type (type);
1297 switch (TREE_CODE (etype))
1300 n = GFC_DTYPE_INTEGER;
1304 n = GFC_DTYPE_LOGICAL;
1312 n = GFC_DTYPE_COMPLEX;
1315 /* We will never have arrays of arrays. */
1317 n = GFC_DTYPE_DERIVED;
1321 n = GFC_DTYPE_CHARACTER;
1325 /* TODO: Don't do dtype for temporary descriptorless arrays. */
1326 /* We can strange array types for temporary arrays. */
1327 return gfc_index_zero_node;
1330 gcc_assert (rank <= GFC_DTYPE_RANK_MASK);
1331 size = TYPE_SIZE_UNIT (etype);
1333 i = rank | (n << GFC_DTYPE_TYPE_SHIFT);
1334 if (size && INTEGER_CST_P (size))
1336 if (tree_int_cst_lt (gfc_max_array_element_size, size))
1337 internal_error ("Array element size too big");
1339 i += TREE_INT_CST_LOW (size) << GFC_DTYPE_SIZE_SHIFT;
1341 dtype = build_int_cst (gfc_array_index_type, i);
1343 if (size && !INTEGER_CST_P (size))
1345 tmp = build_int_cst (gfc_array_index_type, GFC_DTYPE_SIZE_SHIFT);
1346 tmp = fold_build2 (LSHIFT_EXPR, gfc_array_index_type,
1347 fold_convert (gfc_array_index_type, size), tmp);
1348 dtype = fold_build2 (PLUS_EXPR, gfc_array_index_type, tmp, dtype);
1350 /* If we don't know the size we leave it as zero. This should never happen
1351 for anything that is actually used. */
1352 /* TODO: Check this is actually true, particularly when repacking
1353 assumed size parameters. */
1355 GFC_TYPE_ARRAY_DTYPE (type) = dtype;
1360 /* Build an array type for use without a descriptor, packed according
1361 to the value of PACKED. */
1364 gfc_get_nodesc_array_type (tree etype, gfc_array_spec * as, gfc_packed packed,
1378 mpz_init_set_ui (offset, 0);
1379 mpz_init_set_ui (stride, 1);
1382 /* We don't use build_array_type because this does not include include
1383 lang-specific information (i.e. the bounds of the array) when checking
1385 type = make_node (ARRAY_TYPE);
1387 GFC_ARRAY_TYPE_P (type) = 1;
1388 TYPE_LANG_SPECIFIC (type)
1389 = ggc_alloc_cleared_lang_type (sizeof (struct lang_type));
1391 known_stride = (packed != PACKED_NO);
1393 for (n = 0; n < as->rank; n++)
1395 /* Fill in the stride and bound components of the type. */
1397 tmp = gfc_conv_mpz_to_tree (stride, gfc_index_integer_kind);
1400 GFC_TYPE_ARRAY_STRIDE (type, n) = tmp;
1402 expr = as->lower[n];
1403 if (expr->expr_type == EXPR_CONSTANT)
1405 tmp = gfc_conv_mpz_to_tree (expr->value.integer,
1406 gfc_index_integer_kind);
1413 GFC_TYPE_ARRAY_LBOUND (type, n) = tmp;
1417 /* Calculate the offset. */
1418 mpz_mul (delta, stride, as->lower[n]->value.integer);
1419 mpz_sub (offset, offset, delta);
1424 expr = as->upper[n];
1425 if (expr && expr->expr_type == EXPR_CONSTANT)
1427 tmp = gfc_conv_mpz_to_tree (expr->value.integer,
1428 gfc_index_integer_kind);
1435 GFC_TYPE_ARRAY_UBOUND (type, n) = tmp;
1439 /* Calculate the stride. */
1440 mpz_sub (delta, as->upper[n]->value.integer,
1441 as->lower[n]->value.integer);
1442 mpz_add_ui (delta, delta, 1);
1443 mpz_mul (stride, stride, delta);
1446 /* Only the first stride is known for partial packed arrays. */
1447 if (packed == PACKED_NO || packed == PACKED_PARTIAL)
1453 GFC_TYPE_ARRAY_OFFSET (type) =
1454 gfc_conv_mpz_to_tree (offset, gfc_index_integer_kind);
1457 GFC_TYPE_ARRAY_OFFSET (type) = NULL_TREE;
1461 GFC_TYPE_ARRAY_SIZE (type) =
1462 gfc_conv_mpz_to_tree (stride, gfc_index_integer_kind);
1465 GFC_TYPE_ARRAY_SIZE (type) = NULL_TREE;
1467 GFC_TYPE_ARRAY_RANK (type) = as->rank;
1468 GFC_TYPE_ARRAY_DTYPE (type) = NULL_TREE;
1469 range = build_range_type (gfc_array_index_type, gfc_index_zero_node,
1471 /* TODO: use main type if it is unbounded. */
1472 GFC_TYPE_ARRAY_DATAPTR_TYPE (type) =
1473 build_pointer_type (build_array_type (etype, range));
1475 GFC_TYPE_ARRAY_DATAPTR_TYPE (type) =
1476 build_qualified_type (GFC_TYPE_ARRAY_DATAPTR_TYPE (type),
1477 TYPE_QUAL_RESTRICT);
1481 mpz_sub_ui (stride, stride, 1);
1482 range = gfc_conv_mpz_to_tree (stride, gfc_index_integer_kind);
1487 range = build_range_type (gfc_array_index_type, gfc_index_zero_node, range);
1488 TYPE_DOMAIN (type) = range;
1490 build_pointer_type (etype);
1491 TREE_TYPE (type) = etype;
1499 /* Represent packed arrays as multi-dimensional if they have rank >
1500 1 and with proper bounds, instead of flat arrays. This makes for
1501 better debug info. */
1504 tree gtype = etype, rtype, type_decl;
1506 for (n = as->rank - 1; n >= 0; n--)
1508 rtype = build_range_type (gfc_array_index_type,
1509 GFC_TYPE_ARRAY_LBOUND (type, n),
1510 GFC_TYPE_ARRAY_UBOUND (type, n));
1511 gtype = build_array_type (gtype, rtype);
1513 TYPE_NAME (type) = type_decl = build_decl (input_location,
1514 TYPE_DECL, NULL, gtype);
1515 DECL_ORIGINAL_TYPE (type_decl) = gtype;
1518 if (packed != PACKED_STATIC || !known_stride)
1520 /* For dummy arrays and automatic (heap allocated) arrays we
1521 want a pointer to the array. */
1522 type = build_pointer_type (type);
1524 type = build_qualified_type (type, TYPE_QUAL_RESTRICT);
1525 GFC_ARRAY_TYPE_P (type) = 1;
1526 TYPE_LANG_SPECIFIC (type) = TYPE_LANG_SPECIFIC (TREE_TYPE (type));
1531 /* Return or create the base type for an array descriptor. */
1534 gfc_get_array_descriptor_base (int dimen, int codimen, bool restricted)
1536 tree fat_type, decl, arraytype, *chain = NULL;
1537 char name[16 + 2*GFC_RANK_DIGITS + 1 + 1];
1538 int idx = 2 * (codimen + dimen - 1) + restricted;
1540 gcc_assert (dimen >= 1 && codimen + dimen <= GFC_MAX_DIMENSIONS);
1541 if (gfc_array_descriptor_base[idx])
1542 return gfc_array_descriptor_base[idx];
1544 /* Build the type node. */
1545 fat_type = make_node (RECORD_TYPE);
1547 sprintf (name, "array_descriptor" GFC_RANK_PRINTF_FORMAT, dimen + codimen);
1548 TYPE_NAME (fat_type) = get_identifier (name);
1549 TYPE_NAMELESS (fat_type) = 1;
1551 /* Add the data member as the first element of the descriptor. */
1552 decl = gfc_add_field_to_struct_1 (fat_type,
1553 get_identifier ("data"),
1556 : ptr_type_node), &chain);
1558 /* Add the base component. */
1559 decl = gfc_add_field_to_struct_1 (fat_type,
1560 get_identifier ("offset"),
1561 gfc_array_index_type, &chain);
1562 TREE_NO_WARNING (decl) = 1;
1564 /* Add the dtype component. */
1565 decl = gfc_add_field_to_struct_1 (fat_type,
1566 get_identifier ("dtype"),
1567 gfc_array_index_type, &chain);
1568 TREE_NO_WARNING (decl) = 1;
1570 /* Build the array type for the stride and bound components. */
1572 build_array_type (gfc_get_desc_dim_type (),
1573 build_range_type (gfc_array_index_type,
1574 gfc_index_zero_node,
1575 gfc_rank_cst[codimen + dimen - 1]));
1577 decl = gfc_add_field_to_struct_1 (fat_type,
1578 get_identifier ("dim"),
1580 TREE_NO_WARNING (decl) = 1;
1582 /* Finish off the type. */
1583 gfc_finish_type (fat_type);
1584 TYPE_DECL_SUPPRESS_DEBUG (TYPE_STUB_DECL (fat_type)) = 1;
1586 gfc_array_descriptor_base[idx] = fat_type;
1590 /* Build an array (descriptor) type with given bounds. */
1593 gfc_get_array_type_bounds (tree etype, int dimen, int codimen, tree * lbound,
1594 tree * ubound, int packed,
1595 enum gfc_array_kind akind, bool restricted)
1597 char name[8 + 2*GFC_RANK_DIGITS + 1 + GFC_MAX_SYMBOL_LEN];
1598 tree fat_type, base_type, arraytype, lower, upper, stride, tmp, rtype;
1599 const char *type_name;
1602 base_type = gfc_get_array_descriptor_base (dimen, codimen, restricted);
1603 fat_type = build_distinct_type_copy (base_type);
1604 /* Make sure that nontarget and target array type have the same canonical
1605 type (and same stub decl for debug info). */
1606 base_type = gfc_get_array_descriptor_base (dimen, codimen, false);
1607 TYPE_CANONICAL (fat_type) = base_type;
1608 TYPE_STUB_DECL (fat_type) = TYPE_STUB_DECL (base_type);
1610 tmp = TYPE_NAME (etype);
1611 if (tmp && TREE_CODE (tmp) == TYPE_DECL)
1612 tmp = DECL_NAME (tmp);
1614 type_name = IDENTIFIER_POINTER (tmp);
1616 type_name = "unknown";
1617 sprintf (name, "array" GFC_RANK_PRINTF_FORMAT "_%.*s", dimen + codimen,
1618 GFC_MAX_SYMBOL_LEN, type_name);
1619 TYPE_NAME (fat_type) = get_identifier (name);
1620 TYPE_NAMELESS (fat_type) = 1;
1622 GFC_DESCRIPTOR_TYPE_P (fat_type) = 1;
1623 TYPE_LANG_SPECIFIC (fat_type)
1624 = ggc_alloc_cleared_lang_type (sizeof (struct lang_type));
1626 GFC_TYPE_ARRAY_RANK (fat_type) = dimen;
1627 GFC_TYPE_ARRAY_DTYPE (fat_type) = NULL_TREE;
1628 GFC_TYPE_ARRAY_AKIND (fat_type) = akind;
1630 /* Build an array descriptor record type. */
1632 stride = gfc_index_one_node;
1635 for (n = 0; n < dimen; n++)
1637 GFC_TYPE_ARRAY_STRIDE (fat_type, n) = stride;
1644 if (lower != NULL_TREE)
1646 if (INTEGER_CST_P (lower))
1647 GFC_TYPE_ARRAY_LBOUND (fat_type, n) = lower;
1653 if (upper != NULL_TREE)
1655 if (INTEGER_CST_P (upper))
1656 GFC_TYPE_ARRAY_UBOUND (fat_type, n) = upper;
1661 if (upper != NULL_TREE && lower != NULL_TREE && stride != NULL_TREE)
1663 tmp = fold_build2 (MINUS_EXPR, gfc_array_index_type, upper, lower);
1664 tmp = fold_build2 (PLUS_EXPR, gfc_array_index_type, tmp,
1665 gfc_index_one_node);
1667 fold_build2 (MULT_EXPR, gfc_array_index_type, tmp, stride);
1668 /* Check the folding worked. */
1669 gcc_assert (INTEGER_CST_P (stride));
1674 GFC_TYPE_ARRAY_SIZE (fat_type) = stride;
1676 /* TODO: known offsets for descriptors. */
1677 GFC_TYPE_ARRAY_OFFSET (fat_type) = NULL_TREE;
1679 /* We define data as an array with the correct size if possible.
1680 Much better than doing pointer arithmetic. */
1682 rtype = build_range_type (gfc_array_index_type, gfc_index_zero_node,
1683 int_const_binop (MINUS_EXPR, stride,
1684 integer_one_node, 0));
1686 rtype = gfc_array_range_type;
1687 arraytype = build_array_type (etype, rtype);
1688 arraytype = build_pointer_type (arraytype);
1690 arraytype = build_qualified_type (arraytype, TYPE_QUAL_RESTRICT);
1691 GFC_TYPE_ARRAY_DATAPTR_TYPE (fat_type) = arraytype;
1693 /* This will generate the base declarations we need to emit debug
1694 information for this type. FIXME: there must be a better way to
1695 avoid divergence between compilations with and without debug
1698 struct array_descr_info info;
1699 gfc_get_array_descr_info (fat_type, &info);
1700 gfc_get_array_descr_info (build_pointer_type (fat_type), &info);
1706 /* Build a pointer type. This function is called from gfc_sym_type(). */
1709 gfc_build_pointer_type (gfc_symbol * sym, tree type)
1711 /* Array pointer types aren't actually pointers. */
1712 if (sym->attr.dimension)
1715 return build_pointer_type (type);
1718 /* Return the type for a symbol. Special handling is required for character
1719 types to get the correct level of indirection.
1720 For functions return the return type.
1721 For subroutines return void_type_node.
1722 Calling this multiple times for the same symbol should be avoided,
1723 especially for character and array types. */
1726 gfc_sym_type (gfc_symbol * sym)
1732 /* Procedure Pointers inside COMMON blocks. */
1733 if (sym->attr.proc_pointer && sym->attr.in_common)
1735 /* Unset proc_pointer as gfc_get_function_type calls gfc_sym_type. */
1736 sym->attr.proc_pointer = 0;
1737 type = build_pointer_type (gfc_get_function_type (sym));
1738 sym->attr.proc_pointer = 1;
1742 if (sym->attr.flavor == FL_PROCEDURE && !sym->attr.function)
1743 return void_type_node;
1745 /* In the case of a function the fake result variable may have a
1746 type different from the function type, so don't return early in
1748 if (sym->backend_decl && !sym->attr.function)
1749 return TREE_TYPE (sym->backend_decl);
1751 if (sym->ts.type == BT_CHARACTER
1752 && ((sym->attr.function && sym->attr.is_bind_c)
1753 || (sym->attr.result
1754 && sym->ns->proc_name
1755 && sym->ns->proc_name->attr.is_bind_c)))
1756 type = gfc_character1_type_node;
1758 type = gfc_typenode_for_spec (&sym->ts);
1760 if (sym->attr.dummy && !sym->attr.function && !sym->attr.value)
1765 restricted = !sym->attr.target && !sym->attr.pointer
1766 && !sym->attr.proc_pointer && !sym->attr.cray_pointee;
1767 if (sym->attr.dimension)
1769 if (gfc_is_nodesc_array (sym))
1771 /* If this is a character argument of unknown length, just use the
1773 if (sym->ts.type != BT_CHARACTER
1774 || !(sym->attr.dummy || sym->attr.function)
1775 || sym->ts.u.cl->backend_decl)
1777 type = gfc_get_nodesc_array_type (type, sym->as,
1784 if (sym->attr.cray_pointee)
1785 GFC_POINTER_TYPE_P (type) = 1;
1789 enum gfc_array_kind akind = GFC_ARRAY_UNKNOWN;
1790 if (sym->attr.pointer)
1791 akind = sym->attr.contiguous ? GFC_ARRAY_POINTER_CONT
1792 : GFC_ARRAY_POINTER;
1793 else if (sym->attr.allocatable)
1794 akind = GFC_ARRAY_ALLOCATABLE;
1795 type = gfc_build_array_type (type, sym->as, akind, restricted,
1796 sym->attr.contiguous);
1801 if (sym->attr.allocatable || sym->attr.pointer
1802 || gfc_is_associate_pointer (sym))
1803 type = gfc_build_pointer_type (sym, type);
1804 if (sym->attr.pointer || sym->attr.cray_pointee)
1805 GFC_POINTER_TYPE_P (type) = 1;
1808 /* We currently pass all parameters by reference.
1809 See f95_get_function_decl. For dummy function parameters return the
1813 /* We must use pointer types for potentially absent variables. The
1814 optimizers assume a reference type argument is never NULL. */
1815 if (sym->attr.optional || sym->ns->proc_name->attr.entry_master)
1816 type = build_pointer_type (type);
1819 type = build_reference_type (type);
1821 type = build_qualified_type (type, TYPE_QUAL_RESTRICT);
1828 /* Layout and output debug info for a record type. */
1831 gfc_finish_type (tree type)
1835 decl = build_decl (input_location,
1836 TYPE_DECL, NULL_TREE, type);
1837 TYPE_STUB_DECL (type) = decl;
1839 rest_of_type_compilation (type, 1);
1840 rest_of_decl_compilation (decl, 1, 0);
1843 /* Add a field of given NAME and TYPE to the context of a UNION_TYPE
1844 or RECORD_TYPE pointed to by CONTEXT. The new field is chained
1845 to the end of the field list pointed to by *CHAIN.
1847 Returns a pointer to the new field. */
1850 gfc_add_field_to_struct_1 (tree context, tree name, tree type, tree **chain)
1852 tree decl = build_decl (input_location, FIELD_DECL, name, type);
1854 DECL_CONTEXT (decl) = context;
1855 DECL_CHAIN (decl) = NULL_TREE;
1856 if (TYPE_FIELDS (context) == NULL_TREE)
1857 TYPE_FIELDS (context) = decl;
1862 *chain = &DECL_CHAIN (decl);
1868 /* Like `gfc_add_field_to_struct_1', but adds alignment
1872 gfc_add_field_to_struct (tree context, tree name, tree type, tree **chain)
1874 tree decl = gfc_add_field_to_struct_1 (context, name, type, chain);
1876 DECL_INITIAL (decl) = 0;
1877 DECL_ALIGN (decl) = 0;
1878 DECL_USER_ALIGN (decl) = 0;
1884 /* Copy the backend_decl and component backend_decls if
1885 the two derived type symbols are "equal", as described
1886 in 4.4.2 and resolved by gfc_compare_derived_types. */
1889 gfc_copy_dt_decls_ifequal (gfc_symbol *from, gfc_symbol *to,
1892 gfc_component *to_cm;
1893 gfc_component *from_cm;
1895 if (from->backend_decl == NULL
1896 || !gfc_compare_derived_types (from, to))
1899 to->backend_decl = from->backend_decl;
1901 to_cm = to->components;
1902 from_cm = from->components;
1904 /* Copy the component declarations. If a component is itself
1905 a derived type, we need a copy of its component declarations.
1906 This is done by recursing into gfc_get_derived_type and
1907 ensures that the component's component declarations have
1908 been built. If it is a character, we need the character
1910 for (; to_cm; to_cm = to_cm->next, from_cm = from_cm->next)
1912 to_cm->backend_decl = from_cm->backend_decl;
1913 if ((!from_cm->attr.pointer || from_gsym)
1914 && from_cm->ts.type == BT_DERIVED)
1915 gfc_get_derived_type (to_cm->ts.u.derived);
1917 else if (from_cm->ts.type == BT_CHARACTER)
1918 to_cm->ts.u.cl->backend_decl = from_cm->ts.u.cl->backend_decl;
1925 /* Build a tree node for a procedure pointer component. */
1928 gfc_get_ppc_type (gfc_component* c)
1932 /* Explicit interface. */
1933 if (c->attr.if_source != IFSRC_UNKNOWN && c->ts.interface)
1934 return build_pointer_type (gfc_get_function_type (c->ts.interface));
1936 /* Implicit interface (only return value may be known). */
1937 if (c->attr.function && !c->attr.dimension && c->ts.type != BT_CHARACTER)
1938 t = gfc_typenode_for_spec (&c->ts);
1942 return build_pointer_type (build_function_type_list (t, NULL_TREE));
1946 /* Build a tree node for a derived type. If there are equal
1947 derived types, with different local names, these are built
1948 at the same time. If an equal derived type has been built
1949 in a parent namespace, this is used. */
1952 gfc_get_derived_type (gfc_symbol * derived)
1954 tree typenode = NULL, field = NULL, field_type = NULL;
1955 tree canonical = NULL_TREE;
1957 bool got_canonical = false;
1963 gcc_assert (derived && derived->attr.flavor == FL_DERIVED);
1965 /* See if it's one of the iso_c_binding derived types. */
1966 if (derived->attr.is_iso_c == 1)
1968 if (derived->backend_decl)
1969 return derived->backend_decl;
1971 if (derived->intmod_sym_id == ISOCBINDING_PTR)
1972 derived->backend_decl = ptr_type_node;
1974 derived->backend_decl = pfunc_type_node;
1976 derived->ts.kind = gfc_index_integer_kind;
1977 derived->ts.type = BT_INTEGER;
1978 /* Set the f90_type to BT_VOID as a way to recognize something of type
1979 BT_INTEGER that needs to fit a void * for the purpose of the
1980 iso_c_binding derived types. */
1981 derived->ts.f90_type = BT_VOID;
1983 return derived->backend_decl;
1986 /* If use associated, use the module type for this one. */
1987 if (gfc_option.flag_whole_file
1988 && derived->backend_decl == NULL
1989 && derived->attr.use_assoc
1992 gsym = gfc_find_gsymbol (gfc_gsym_root, derived->module);
1993 if (gsym && gsym->ns && gsym->type == GSYM_MODULE)
1997 gfc_find_symbol (derived->name, gsym->ns, 0, &s);
2000 if (!s->backend_decl)
2001 s->backend_decl = gfc_get_derived_type (s);
2002 gfc_copy_dt_decls_ifequal (s, derived, true);
2003 goto copy_derived_types;
2008 /* If a whole file compilation, the derived types from an earlier
2009 namespace can be used as the the canonical type. */
2010 if (gfc_option.flag_whole_file
2011 && derived->backend_decl == NULL
2012 && !derived->attr.use_assoc
2013 && gfc_global_ns_list)
2015 for (ns = gfc_global_ns_list;
2016 ns->translated && !got_canonical;
2019 dt = ns->derived_types;
2020 for (; dt && !canonical; dt = dt->next)
2022 gfc_copy_dt_decls_ifequal (dt->derived, derived, true);
2023 if (derived->backend_decl)
2024 got_canonical = true;
2029 /* Store up the canonical type to be added to this one. */
2032 if (TYPE_CANONICAL (derived->backend_decl))
2033 canonical = TYPE_CANONICAL (derived->backend_decl);
2035 canonical = derived->backend_decl;
2037 derived->backend_decl = NULL_TREE;
2040 /* derived->backend_decl != 0 means we saw it before, but its
2041 components' backend_decl may have not been built. */
2042 if (derived->backend_decl)
2044 /* Its components' backend_decl have been built or we are
2045 seeing recursion through the formal arglist of a procedure
2046 pointer component. */
2047 if (TYPE_FIELDS (derived->backend_decl)
2048 || derived->attr.proc_pointer_comp)
2049 return derived->backend_decl;
2051 typenode = derived->backend_decl;
2055 /* We see this derived type first time, so build the type node. */
2056 typenode = make_node (RECORD_TYPE);
2057 TYPE_NAME (typenode) = get_identifier (derived->name);
2058 TYPE_PACKED (typenode) = gfc_option.flag_pack_derived;
2059 derived->backend_decl = typenode;
2062 /* Go through the derived type components, building them as
2063 necessary. The reason for doing this now is that it is
2064 possible to recurse back to this derived type through a
2065 pointer component (PR24092). If this happens, the fields
2066 will be built and so we can return the type. */
2067 for (c = derived->components; c; c = c->next)
2069 if (c->ts.type != BT_DERIVED && c->ts.type != BT_CLASS)
2072 if ((!c->attr.pointer && !c->attr.proc_pointer)
2073 || c->ts.u.derived->backend_decl == NULL)
2074 c->ts.u.derived->backend_decl = gfc_get_derived_type (c->ts.u.derived);
2076 if (c->ts.u.derived && c->ts.u.derived->attr.is_iso_c)
2078 /* Need to copy the modified ts from the derived type. The
2079 typespec was modified because C_PTR/C_FUNPTR are translated
2080 into (void *) from derived types. */
2081 c->ts.type = c->ts.u.derived->ts.type;
2082 c->ts.kind = c->ts.u.derived->ts.kind;
2083 c->ts.f90_type = c->ts.u.derived->ts.f90_type;
2086 c->initializer->ts.type = c->ts.type;
2087 c->initializer->ts.kind = c->ts.kind;
2088 c->initializer->ts.f90_type = c->ts.f90_type;
2089 c->initializer->expr_type = EXPR_NULL;
2094 if (TYPE_FIELDS (derived->backend_decl))
2095 return derived->backend_decl;
2097 /* Build the type member list. Install the newly created RECORD_TYPE
2098 node as DECL_CONTEXT of each FIELD_DECL. */
2099 for (c = derived->components; c; c = c->next)
2101 if (c->attr.proc_pointer)
2102 field_type = gfc_get_ppc_type (c);
2103 else if (c->ts.type == BT_DERIVED || c->ts.type == BT_CLASS)
2104 field_type = c->ts.u.derived->backend_decl;
2107 if (c->ts.type == BT_CHARACTER)
2109 /* Evaluate the string length. */
2110 gfc_conv_const_charlen (c->ts.u.cl);
2111 gcc_assert (c->ts.u.cl->backend_decl);
2114 field_type = gfc_typenode_for_spec (&c->ts);
2117 /* This returns an array descriptor type. Initialization may be
2119 if (c->attr.dimension && !c->attr.proc_pointer)
2121 if (c->attr.pointer || c->attr.allocatable)
2123 enum gfc_array_kind akind;
2124 if (c->attr.pointer)
2125 akind = c->attr.contiguous ? GFC_ARRAY_POINTER_CONT
2126 : GFC_ARRAY_POINTER;
2128 akind = GFC_ARRAY_ALLOCATABLE;
2129 /* Pointers to arrays aren't actually pointer types. The
2130 descriptors are separate, but the data is common. */
2131 field_type = gfc_build_array_type (field_type, c->as, akind,
2133 && !c->attr.pointer,
2134 c->attr.contiguous);
2137 field_type = gfc_get_nodesc_array_type (field_type, c->as,
2141 else if ((c->attr.pointer || c->attr.allocatable)
2142 && !c->attr.proc_pointer)
2143 field_type = build_pointer_type (field_type);
2145 /* vtype fields can point to different types to the base type. */
2146 if (c->ts.type == BT_DERIVED && c->ts.u.derived->attr.vtype)
2147 field_type = build_pointer_type_for_mode (TREE_TYPE (field_type),
2150 field = gfc_add_field_to_struct (typenode,
2151 get_identifier (c->name),
2152 field_type, &chain);
2154 gfc_set_decl_location (field, &c->loc);
2155 else if (derived->declared_at.lb)
2156 gfc_set_decl_location (field, &derived->declared_at);
2158 DECL_PACKED (field) |= TYPE_PACKED (typenode);
2161 if (!c->backend_decl)
2162 c->backend_decl = field;
2165 /* Now lay out the derived type, including the fields. */
2167 TYPE_CANONICAL (typenode) = canonical;
2169 gfc_finish_type (typenode);
2170 gfc_set_decl_location (TYPE_STUB_DECL (typenode), &derived->declared_at);
2171 if (derived->module && derived->ns->proc_name
2172 && derived->ns->proc_name->attr.flavor == FL_MODULE)
2174 if (derived->ns->proc_name->backend_decl
2175 && TREE_CODE (derived->ns->proc_name->backend_decl)
2178 TYPE_CONTEXT (typenode) = derived->ns->proc_name->backend_decl;
2179 DECL_CONTEXT (TYPE_STUB_DECL (typenode))
2180 = derived->ns->proc_name->backend_decl;
2184 derived->backend_decl = typenode;
2188 for (dt = gfc_derived_types; dt; dt = dt->next)
2189 gfc_copy_dt_decls_ifequal (derived, dt->derived, false);
2191 return derived->backend_decl;
2196 gfc_return_by_reference (gfc_symbol * sym)
2198 if (!sym->attr.function)
2201 if (sym->attr.dimension)
2204 if (sym->ts.type == BT_CHARACTER
2205 && !sym->attr.is_bind_c
2206 && (!sym->attr.result
2207 || !sym->ns->proc_name
2208 || !sym->ns->proc_name->attr.is_bind_c))
2211 /* Possibly return complex numbers by reference for g77 compatibility.
2212 We don't do this for calls to intrinsics (as the library uses the
2213 -fno-f2c calling convention), nor for calls to functions which always
2214 require an explicit interface, as no compatibility problems can
2216 if (gfc_option.flag_f2c
2217 && sym->ts.type == BT_COMPLEX
2218 && !sym->attr.intrinsic && !sym->attr.always_explicit)
2225 gfc_get_mixed_entry_union (gfc_namespace *ns)
2229 char name[GFC_MAX_SYMBOL_LEN + 1];
2230 gfc_entry_list *el, *el2;
2232 gcc_assert (ns->proc_name->attr.mixed_entry_master);
2233 gcc_assert (memcmp (ns->proc_name->name, "master.", 7) == 0);
2235 snprintf (name, GFC_MAX_SYMBOL_LEN, "munion.%s", ns->proc_name->name + 7);
2237 /* Build the type node. */
2238 type = make_node (UNION_TYPE);
2240 TYPE_NAME (type) = get_identifier (name);
2242 for (el = ns->entries; el; el = el->next)
2244 /* Search for duplicates. */
2245 for (el2 = ns->entries; el2 != el; el2 = el2->next)
2246 if (el2->sym->result == el->sym->result)
2250 gfc_add_field_to_struct_1 (type,
2251 get_identifier (el->sym->result->name),
2252 gfc_sym_type (el->sym->result), &chain);
2255 /* Finish off the type. */
2256 gfc_finish_type (type);
2257 TYPE_DECL_SUPPRESS_DEBUG (TYPE_STUB_DECL (type)) = 1;
2262 gfc_get_function_type (gfc_symbol * sym)
2266 gfc_formal_arglist *f;
2269 int alternate_return;
2271 /* Make sure this symbol is a function, a subroutine or the main
2273 gcc_assert (sym->attr.flavor == FL_PROCEDURE
2274 || sym->attr.flavor == FL_PROGRAM);
2276 if (sym->backend_decl)
2277 return TREE_TYPE (sym->backend_decl);
2280 alternate_return = 0;
2281 typelist = NULL_TREE;
2283 if (sym->attr.entry_master)
2285 /* Additional parameter for selecting an entry point. */
2286 typelist = gfc_chainon_list (typelist, gfc_array_index_type);
2294 if (arg->ts.type == BT_CHARACTER)
2295 gfc_conv_const_charlen (arg->ts.u.cl);
2297 /* Some functions we use an extra parameter for the return value. */
2298 if (gfc_return_by_reference (sym))
2300 type = gfc_sym_type (arg);
2301 if (arg->ts.type == BT_COMPLEX
2302 || arg->attr.dimension
2303 || arg->ts.type == BT_CHARACTER)
2304 type = build_reference_type (type);
2306 typelist = gfc_chainon_list (typelist, type);
2307 if (arg->ts.type == BT_CHARACTER)
2308 typelist = gfc_chainon_list (typelist, gfc_charlen_type_node);
2311 /* Build the argument types for the function. */
2312 for (f = sym->formal; f; f = f->next)
2317 /* Evaluate constant character lengths here so that they can be
2318 included in the type. */
2319 if (arg->ts.type == BT_CHARACTER)
2320 gfc_conv_const_charlen (arg->ts.u.cl);
2322 if (arg->attr.flavor == FL_PROCEDURE)
2324 type = gfc_get_function_type (arg);
2325 type = build_pointer_type (type);
2328 type = gfc_sym_type (arg);
2330 /* Parameter Passing Convention
2332 We currently pass all parameters by reference.
2333 Parameters with INTENT(IN) could be passed by value.
2334 The problem arises if a function is called via an implicit
2335 prototype. In this situation the INTENT is not known.
2336 For this reason all parameters to global functions must be
2337 passed by reference. Passing by value would potentially
2338 generate bad code. Worse there would be no way of telling that
2339 this code was bad, except that it would give incorrect results.
2341 Contained procedures could pass by value as these are never
2342 used without an explicit interface, and cannot be passed as
2343 actual parameters for a dummy procedure. */
2344 if (arg->ts.type == BT_CHARACTER && !sym->attr.is_bind_c)
2346 typelist = gfc_chainon_list (typelist, type);
2350 if (sym->attr.subroutine)
2351 alternate_return = 1;
2355 /* Add hidden string length parameters. */
2357 typelist = gfc_chainon_list (typelist, gfc_charlen_type_node);
2360 typelist = chainon (typelist, void_list_node);
2361 else if (sym->attr.is_main_program)
2362 typelist = void_list_node;
2364 if (alternate_return)
2365 type = integer_type_node;
2366 else if (!sym->attr.function || gfc_return_by_reference (sym))
2367 type = void_type_node;
2368 else if (sym->attr.mixed_entry_master)
2369 type = gfc_get_mixed_entry_union (sym->ns);
2370 else if (gfc_option.flag_f2c
2371 && sym->ts.type == BT_REAL
2372 && sym->ts.kind == gfc_default_real_kind
2373 && !sym->attr.always_explicit)
2375 /* Special case: f2c calling conventions require that (scalar)
2376 default REAL functions return the C type double instead. f2c
2377 compatibility is only an issue with functions that don't
2378 require an explicit interface, as only these could be
2379 implemented in Fortran 77. */
2380 sym->ts.kind = gfc_default_double_kind;
2381 type = gfc_typenode_for_spec (&sym->ts);
2382 sym->ts.kind = gfc_default_real_kind;
2384 else if (sym->result && sym->result->attr.proc_pointer)
2385 /* Procedure pointer return values. */
2387 if (sym->result->attr.result && strcmp (sym->name,"ppr@") != 0)
2389 /* Unset proc_pointer as gfc_get_function_type
2390 is called recursively. */
2391 sym->result->attr.proc_pointer = 0;
2392 type = build_pointer_type (gfc_get_function_type (sym->result));
2393 sym->result->attr.proc_pointer = 1;
2396 type = gfc_sym_type (sym->result);
2399 type = gfc_sym_type (sym);
2401 type = build_function_type (type, typelist);
2406 /* Language hooks for middle-end access to type nodes. */
2408 /* Return an integer type with BITS bits of precision,
2409 that is unsigned if UNSIGNEDP is nonzero, otherwise signed. */
2412 gfc_type_for_size (unsigned bits, int unsignedp)
2417 for (i = 0; i <= MAX_INT_KINDS; ++i)
2419 tree type = gfc_integer_types[i];
2420 if (type && bits == TYPE_PRECISION (type))
2424 /* Handle TImode as a special case because it is used by some backends
2425 (e.g. ARM) even though it is not available for normal use. */
2426 #if HOST_BITS_PER_WIDE_INT >= 64
2427 if (bits == TYPE_PRECISION (intTI_type_node))
2428 return intTI_type_node;
2433 if (bits == TYPE_PRECISION (unsigned_intQI_type_node))
2434 return unsigned_intQI_type_node;
2435 if (bits == TYPE_PRECISION (unsigned_intHI_type_node))
2436 return unsigned_intHI_type_node;
2437 if (bits == TYPE_PRECISION (unsigned_intSI_type_node))
2438 return unsigned_intSI_type_node;
2439 if (bits == TYPE_PRECISION (unsigned_intDI_type_node))
2440 return unsigned_intDI_type_node;
2441 if (bits == TYPE_PRECISION (unsigned_intTI_type_node))
2442 return unsigned_intTI_type_node;
2448 /* Return a data type that has machine mode MODE. If the mode is an
2449 integer, then UNSIGNEDP selects between signed and unsigned types. */
2452 gfc_type_for_mode (enum machine_mode mode, int unsignedp)
2457 if (GET_MODE_CLASS (mode) == MODE_FLOAT)
2458 base = gfc_real_types;
2459 else if (GET_MODE_CLASS (mode) == MODE_COMPLEX_FLOAT)
2460 base = gfc_complex_types;
2461 else if (SCALAR_INT_MODE_P (mode))
2462 return gfc_type_for_size (GET_MODE_PRECISION (mode), unsignedp);
2463 else if (VECTOR_MODE_P (mode))
2465 enum machine_mode inner_mode = GET_MODE_INNER (mode);
2466 tree inner_type = gfc_type_for_mode (inner_mode, unsignedp);
2467 if (inner_type != NULL_TREE)
2468 return build_vector_type_for_mode (inner_type, mode);
2474 for (i = 0; i <= MAX_REAL_KINDS; ++i)
2476 tree type = base[i];
2477 if (type && mode == TYPE_MODE (type))
2484 /* Return TRUE if TYPE is a type with a hidden descriptor, fill in INFO
2488 gfc_get_array_descr_info (const_tree type, struct array_descr_info *info)
2491 bool indirect = false;
2492 tree etype, ptype, field, t, base_decl;
2493 tree data_off, dim_off, dim_size, elem_size;
2494 tree lower_suboff, upper_suboff, stride_suboff;
2496 if (! GFC_DESCRIPTOR_TYPE_P (type))
2498 if (! POINTER_TYPE_P (type))
2500 type = TREE_TYPE (type);
2501 if (! GFC_DESCRIPTOR_TYPE_P (type))
2506 rank = GFC_TYPE_ARRAY_RANK (type);
2507 if (rank >= (int) (sizeof (info->dimen) / sizeof (info->dimen[0])))
2510 etype = GFC_TYPE_ARRAY_DATAPTR_TYPE (type);
2511 gcc_assert (POINTER_TYPE_P (etype));
2512 etype = TREE_TYPE (etype);
2513 gcc_assert (TREE_CODE (etype) == ARRAY_TYPE);
2514 etype = TREE_TYPE (etype);
2515 /* Can't handle variable sized elements yet. */
2516 if (int_size_in_bytes (etype) <= 0)
2518 /* Nor non-constant lower bounds in assumed shape arrays. */
2519 if (GFC_TYPE_ARRAY_AKIND (type) == GFC_ARRAY_ASSUMED_SHAPE
2520 || GFC_TYPE_ARRAY_AKIND (type) == GFC_ARRAY_ASSUMED_SHAPE_CONT)
2522 for (dim = 0; dim < rank; dim++)
2523 if (GFC_TYPE_ARRAY_LBOUND (type, dim) == NULL_TREE
2524 || TREE_CODE (GFC_TYPE_ARRAY_LBOUND (type, dim)) != INTEGER_CST)
2528 memset (info, '\0', sizeof (*info));
2529 info->ndimensions = rank;
2530 info->element_type = etype;
2531 ptype = build_pointer_type (gfc_array_index_type);
2532 base_decl = GFC_TYPE_ARRAY_BASE_DECL (type, indirect);
2535 base_decl = build_decl (input_location, VAR_DECL, NULL_TREE,
2536 indirect ? build_pointer_type (ptype) : ptype);
2537 GFC_TYPE_ARRAY_BASE_DECL (type, indirect) = base_decl;
2539 info->base_decl = base_decl;
2541 base_decl = build1 (INDIRECT_REF, ptype, base_decl);
2543 if (GFC_TYPE_ARRAY_SPAN (type))
2544 elem_size = GFC_TYPE_ARRAY_SPAN (type);
2546 elem_size = fold_convert (gfc_array_index_type, TYPE_SIZE_UNIT (etype));
2547 field = TYPE_FIELDS (TYPE_MAIN_VARIANT (type));
2548 data_off = byte_position (field);
2549 field = DECL_CHAIN (field);
2550 field = DECL_CHAIN (field);
2551 field = DECL_CHAIN (field);
2552 dim_off = byte_position (field);
2553 dim_size = TYPE_SIZE_UNIT (TREE_TYPE (TREE_TYPE (field)));
2554 field = TYPE_FIELDS (TREE_TYPE (TREE_TYPE (field)));
2555 stride_suboff = byte_position (field);
2556 field = DECL_CHAIN (field);
2557 lower_suboff = byte_position (field);
2558 field = DECL_CHAIN (field);
2559 upper_suboff = byte_position (field);
2562 if (!integer_zerop (data_off))
2563 t = build2 (POINTER_PLUS_EXPR, ptype, t, data_off);
2564 t = build1 (NOP_EXPR, build_pointer_type (ptr_type_node), t);
2565 info->data_location = build1 (INDIRECT_REF, ptr_type_node, t);
2566 if (GFC_TYPE_ARRAY_AKIND (type) == GFC_ARRAY_ALLOCATABLE)
2567 info->allocated = build2 (NE_EXPR, boolean_type_node,
2568 info->data_location, null_pointer_node);
2569 else if (GFC_TYPE_ARRAY_AKIND (type) == GFC_ARRAY_POINTER
2570 || GFC_TYPE_ARRAY_AKIND (type) == GFC_ARRAY_POINTER_CONT)
2571 info->associated = build2 (NE_EXPR, boolean_type_node,
2572 info->data_location, null_pointer_node);
2574 for (dim = 0; dim < rank; dim++)
2576 t = build2 (POINTER_PLUS_EXPR, ptype, base_decl,
2577 size_binop (PLUS_EXPR, dim_off, lower_suboff));
2578 t = build1 (INDIRECT_REF, gfc_array_index_type, t);
2579 info->dimen[dim].lower_bound = t;
2580 t = build2 (POINTER_PLUS_EXPR, ptype, base_decl,
2581 size_binop (PLUS_EXPR, dim_off, upper_suboff));
2582 t = build1 (INDIRECT_REF, gfc_array_index_type, t);
2583 info->dimen[dim].upper_bound = t;
2584 if (GFC_TYPE_ARRAY_AKIND (type) == GFC_ARRAY_ASSUMED_SHAPE
2585 || GFC_TYPE_ARRAY_AKIND (type) == GFC_ARRAY_ASSUMED_SHAPE_CONT)
2587 /* Assumed shape arrays have known lower bounds. */
2588 info->dimen[dim].upper_bound
2589 = build2 (MINUS_EXPR, gfc_array_index_type,
2590 info->dimen[dim].upper_bound,
2591 info->dimen[dim].lower_bound);
2592 info->dimen[dim].lower_bound
2593 = fold_convert (gfc_array_index_type,
2594 GFC_TYPE_ARRAY_LBOUND (type, dim));
2595 info->dimen[dim].upper_bound
2596 = build2 (PLUS_EXPR, gfc_array_index_type,
2597 info->dimen[dim].lower_bound,
2598 info->dimen[dim].upper_bound);
2600 t = build2 (POINTER_PLUS_EXPR, ptype, base_decl,
2601 size_binop (PLUS_EXPR, dim_off, stride_suboff));
2602 t = build1 (INDIRECT_REF, gfc_array_index_type, t);
2603 t = build2 (MULT_EXPR, gfc_array_index_type, t, elem_size);
2604 info->dimen[dim].stride = t;
2605 dim_off = size_binop (PLUS_EXPR, dim_off, dim_size);
2611 #include "gt-fortran-trans-types.h"