1 /****************************************************************************
3 * GNAT COMPILER COMPONENTS *
7 * C Implementation File *
9 * Copyright (C) 1992-2015, Free Software Foundation, Inc. *
11 * GNAT is free software; you can redistribute it and/or modify it under *
12 * terms of the GNU General Public License as published by the Free Soft- *
13 * ware Foundation; either version 3, or (at your option) any later ver- *
14 * sion. GNAT is distributed in the hope that it will be useful, but WITH- *
15 * OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY *
16 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License *
17 * for more details. You should have received a copy of the GNU General *
18 * Public License distributed with GNAT; see file COPYING3. If not see *
19 * <http://www.gnu.org/licenses/>. *
21 * GNAT was originally developed by the GNAT team at New York University. *
22 * Extensive contributions were provided by Ada Core Technologies Inc. *
24 ****************************************************************************/
28 #include "coretypes.h"
35 #include "double-int.h"
42 #include "fold-const.h"
43 #include "stor-layout.h"
44 #include "print-tree.h"
45 #include "diagnostic.h"
51 #include "langhooks.h"
52 #include "langhooks-def.h"
59 #include "hard-reg-set.h"
61 #include "function.h" /* For pass_by_reference. */
62 #include "dwarf2out.h"
65 #include "adadecode.h"
79 /* This symbol needs to be defined for the front-end. */
80 void *callgraph_info_file = NULL;
82 /* Command-line argc and argv. These variables are global since they are
83 imported in back_end.adb. */
84 unsigned int save_argc;
85 const char **save_argv;
87 /* GNAT argc and argv. */
89 extern char **gnat_argv;
95 /* Declare functions we use as part of startup. */
96 extern void __gnat_initialize (void *);
97 extern void __gnat_install_SEH_handler (void *);
98 extern void adainit (void);
99 extern void _ada_gnat1drv (void);
105 /* The parser for the language. For us, we process the GNAT tree. */
108 gnat_parse_file (void)
112 /* Call the target specific initializations. */
113 __gnat_initialize (NULL);
115 /* ??? Call the SEH initialization routine. This is to workaround
116 a bootstrap path problem. The call below should be removed at some
117 point and the SEH pointer passed to __gnat_initialize() above. */
118 __gnat_install_SEH_handler((void *)seh);
120 /* Call the front-end elaboration procedures. */
123 /* Call the front end. */
127 /* Return language mask for option processing. */
130 gnat_option_lang_mask (void)
135 /* Decode all the language specific options that cannot be decoded by GCC.
136 The option decoding phase of GCC calls this routine on the flags that
137 are marked as Ada-specific. Return true on success or false on failure. */
140 gnat_handle_option (size_t scode, const char *arg ATTRIBUTE_UNUSED, int value,
141 int kind ATTRIBUTE_UNUSED, location_t loc ATTRIBUTE_UNUSED,
142 const struct cl_option_handlers *handlers ATTRIBUTE_UNUSED)
144 enum opt_code code = (enum opt_code) scode;
149 handle_generated_option (&global_options, &global_options_set,
150 OPT_Wunused, NULL, value,
151 gnat_option_lang_mask (), kind, loc,
152 handlers, global_dc);
153 warn_uninitialized = value;
154 warn_maybe_uninitialized = value;
158 warning (0, "%<-gnat%> misspelled as %<-gant%>");
160 /* ... fall through ... */
168 /* These are handled by the front-end. */
171 case OPT_fshort_enums:
172 /* This is handled by the middle-end. */
179 Ada_handle_option_auto (&global_options, &global_options_set,
181 gnat_option_lang_mask (), kind,
182 loc, handlers, global_dc);
186 /* Initialize options structure OPTS. */
189 gnat_init_options_struct (struct gcc_options *opts)
191 /* Uninitialized really means uninitialized in Ada. */
192 opts->x_flag_zero_initialized_in_bss = 0;
194 /* We don't care about errno in Ada and it causes __builtin_sqrt to
195 call the libm function rather than do it inline. */
196 opts->x_flag_errno_math = 0;
197 opts->frontend_set_flag_errno_math = true;
200 /* Initialize for option processing. */
203 gnat_init_options (unsigned int decoded_options_count,
204 struct cl_decoded_option *decoded_options)
206 /* Reconstruct an argv array for use of back_end.adb.
208 ??? back_end.adb should not rely on this; instead, it should work with
209 decoded options without such reparsing, to ensure consistency in how
210 options are decoded. */
213 save_argv = XNEWVEC (const char *, 2 * decoded_options_count + 1);
215 for (i = 0; i < decoded_options_count; i++)
217 size_t num_elements = decoded_options[i].canonical_option_num_elements;
219 if (decoded_options[i].errors
220 || decoded_options[i].opt_index == OPT_SPECIAL_unknown
221 || num_elements == 0)
224 /* Deal with -I- specially since it must be a single switch. */
225 if (decoded_options[i].opt_index == OPT_I
227 && decoded_options[i].canonical_option[1][0] == '-'
228 && decoded_options[i].canonical_option[1][1] == '\0')
229 save_argv[save_argc++] = "-I-";
232 gcc_assert (num_elements >= 1 && num_elements <= 2);
233 save_argv[save_argc++] = decoded_options[i].canonical_option[0];
234 if (num_elements >= 2)
235 save_argv[save_argc++] = decoded_options[i].canonical_option[1];
238 save_argv[save_argc] = NULL;
240 gnat_argv = (char **) xmalloc (sizeof (save_argv[0]));
241 gnat_argv[0] = xstrdup (save_argv[0]); /* name of the command */
245 /* Ada code requires variables for these settings rather than elements
246 of the global_options structure. */
249 #undef flag_compare_debug
250 #undef flag_short_enums
251 #undef flag_stack_check
252 int gnat_encodings = 0;
255 int flag_compare_debug;
256 int flag_short_enums;
257 enum stack_check_type flag_stack_check = NO_STACK_CHECK;
259 /* Settings adjustments after switches processing by the back-end.
260 Note that the front-end switches processing (Scan_Compiler_Arguments)
261 has not been done yet at this point! */
264 gnat_post_options (const char **pfilename ATTRIBUTE_UNUSED)
266 /* Excess precision other than "fast" requires front-end support. */
267 if (flag_excess_precision_cmdline == EXCESS_PRECISION_STANDARD
268 && TARGET_FLT_EVAL_METHOD_NON_DEFAULT)
269 sorry ("-fexcess-precision=standard for Ada");
270 flag_excess_precision_cmdline = EXCESS_PRECISION_FAST;
272 /* ??? The warning machinery is outsmarted by Ada. */
273 warn_unused_parameter = 0;
275 /* No psABI change warnings for Ada. */
278 /* No caret by default for Ada. */
279 if (!global_options_set.x_flag_diagnostics_show_caret)
280 global_dc->show_caret = false;
282 optimize = global_options.x_optimize;
283 optimize_size = global_options.x_optimize_size;
284 flag_compare_debug = global_options.x_flag_compare_debug;
285 flag_stack_check = global_options.x_flag_stack_check;
286 flag_short_enums = global_options.x_flag_short_enums;
288 /* Unfortunately the post_options hook is called before the value of
289 flag_short_enums is autodetected, if need be. Mimic the process
290 for our private flag_short_enums. */
291 if (flag_short_enums == 2)
292 flag_short_enums = targetm.default_short_enums ();
297 /* Here is the function to handle the compiler error processing in GCC. */
300 internal_error_function (diagnostic_context *context,
301 const char *msgid, va_list *ap)
304 char *buffer, *p, *loc;
305 String_Template temp, temp_loc;
306 String_Pointer sp, sp_loc;
307 expanded_location xloc;
309 /* Warn if plugins present. */
312 /* Reset the pretty-printer. */
313 pp_clear_output_area (context->printer);
315 /* Format the message into the pretty-printer. */
316 tinfo.format_spec = msgid;
318 tinfo.err_no = errno;
319 pp_format_verbatim (context->printer, &tinfo);
321 /* Extract a (writable) pointer to the formatted text. */
322 buffer = xstrdup (pp_formatted_text (context->printer));
324 /* Go up to the first newline. */
325 for (p = buffer; *p; p++)
333 temp.High_Bound = p - buffer;
337 xloc = expand_location (input_location);
338 if (context->show_column && xloc.column != 0)
339 loc = xasprintf ("%s:%d:%d", xloc.file, xloc.line, xloc.column);
341 loc = xasprintf ("%s:%d", xloc.file, xloc.line);
342 temp_loc.Low_Bound = 1;
343 temp_loc.High_Bound = strlen (loc);
344 sp_loc.Bounds = &temp_loc;
347 Current_Error_Node = error_gnat_node;
348 Compiler_Abort (sp, sp_loc, true);
351 /* Perform all the initialization steps that are language-specific. */
356 /* Do little here, most of the standard declarations are set up after the
357 front-end has been run. Use the same `char' as C, this doesn't really
358 matter since we'll use the explicit `unsigned char' for Character. */
359 build_common_tree_nodes (flag_signed_char, false);
361 /* In Ada, we use an unsigned 8-bit type for the default boolean type. */
362 boolean_type_node = make_unsigned_type (8);
363 TREE_SET_CODE (boolean_type_node, BOOLEAN_TYPE);
364 SET_TYPE_RM_MAX_VALUE (boolean_type_node,
365 build_int_cst (boolean_type_node, 1));
366 SET_TYPE_RM_SIZE (boolean_type_node, bitsize_int (1));
367 boolean_true_node = TYPE_MAX_VALUE (boolean_type_node);
368 boolean_false_node = TYPE_MIN_VALUE (boolean_type_node);
370 sbitsize_one_node = sbitsize_int (1);
371 sbitsize_unit_node = sbitsize_int (BITS_PER_UNIT);
373 /* Show that REFERENCE_TYPEs are internal and should be Pmode. */
374 internal_reference_types ();
376 /* Register our internal error function. */
377 global_dc->internal_error = &internal_error_function;
382 /* Initialize the GCC support for exception handling. */
385 gnat_init_gcc_eh (void)
387 /* We shouldn't do anything if the No_Exceptions_Handler pragma is set,
388 though. This could for instance lead to the emission of tables with
389 references to symbols (such as the Ada eh personality routine) within
390 libraries we won't link against. */
391 if (No_Exception_Handlers_Set ())
394 /* Tell GCC we are handling cleanup actions through exception propagation.
395 This opens possibilities that we don't take advantage of yet, but is
396 nonetheless necessary to ensure that fixup code gets assigned to the
397 right exception regions. */
398 using_eh_for_cleanups ();
400 /* Turn on -fexceptions, -fnon-call-exceptions and -fdelete-dead-exceptions.
401 The first one triggers the generation of the necessary exception tables.
402 The second one is useful for two reasons: 1/ we map some asynchronous
403 signals like SEGV to exceptions, so we need to ensure that the insns
404 which can lead to such signals are correctly attached to the exception
405 region they pertain to, 2/ some calls to pure subprograms are handled as
406 libcall blocks and then marked as "cannot trap" if the flag is not set
407 (see emit_libcall_block). We should not let this be since it is possible
408 for such calls to actually raise in Ada.
409 The third one is an optimization that makes it possible to delete dead
410 instructions that may throw exceptions, most notably loads and stores,
411 as permitted in Ada. */
413 flag_non_call_exceptions = 1;
414 flag_delete_dead_exceptions = 1;
419 /* Initialize the GCC support for floating-point operations. */
422 gnat_init_gcc_fp (void)
424 /* Disable FP optimizations that ignore the signedness of zero if
425 S'Signed_Zeros is true, but don't override the user if not. */
426 if (Signed_Zeros_On_Target)
427 flag_signed_zeros = 1;
428 else if (!global_options_set.x_flag_signed_zeros)
429 flag_signed_zeros = 0;
431 /* Assume that FP operations can trap if S'Machine_Overflow is true,
432 but don't override the user if not. */
433 if (Machine_Overflows_On_Target)
434 flag_trapping_math = 1;
435 else if (!global_options_set.x_flag_trapping_math)
436 flag_trapping_math = 0;
439 /* Print language-specific items in declaration NODE. */
442 gnat_print_decl (FILE *file, tree node, int indent)
444 switch (TREE_CODE (node))
447 print_node (file, "corresponding var",
448 DECL_CONST_CORRESPONDING_VAR (node), indent + 4);
452 print_node (file, "original field", DECL_ORIGINAL_FIELD (node),
457 if (DECL_LOOP_PARM_P (node))
458 print_node (file, "induction var", DECL_INDUCTION_VAR (node),
461 print_node (file, "renamed object", DECL_RENAMED_OBJECT (node),
470 /* Print language-specific items in type NODE. */
473 gnat_print_type (FILE *file, tree node, int indent)
475 switch (TREE_CODE (node))
478 print_node (file, "ci/co list", TYPE_CI_CO_LIST (node), indent + 4);
482 if (TYPE_MODULAR_P (node))
483 print_node_brief (file, "modulus", TYPE_MODULUS (node), indent + 4);
484 else if (TYPE_HAS_ACTUAL_BOUNDS_P (node))
485 print_node (file, "actual bounds", TYPE_ACTUAL_BOUNDS (node),
488 print_node (file, "index type", TYPE_INDEX_TYPE (node), indent + 4);
490 /* ... fall through ... */
494 print_node_brief (file, "RM size", TYPE_RM_SIZE (node), indent + 4);
496 /* ... fall through ... */
499 print_node_brief (file, "RM min", TYPE_RM_MIN_VALUE (node), indent + 4);
500 print_node_brief (file, "RM max", TYPE_RM_MAX_VALUE (node), indent + 4);
504 print_node (file,"actual bounds", TYPE_ACTUAL_BOUNDS (node), indent + 4);
508 print_node (file,"representative array",
509 TYPE_REPRESENTATIVE_ARRAY (node), indent + 4);
513 if (TYPE_FAT_POINTER_P (node) || TYPE_CONTAINS_TEMPLATE_P (node))
514 print_node (file, "unconstrained array",
515 TYPE_UNCONSTRAINED_ARRAY (node), indent + 4);
517 print_node (file, "Ada size", TYPE_ADA_SIZE (node), indent + 4);
521 case QUAL_UNION_TYPE:
522 print_node (file, "Ada size", TYPE_ADA_SIZE (node), indent + 4);
530 /* Return the name to be printed for DECL. */
533 gnat_printable_name (tree decl, int verbosity)
535 const char *coded_name = IDENTIFIER_POINTER (DECL_NAME (decl));
536 char *ada_name = (char *) ggc_alloc_atomic (strlen (coded_name) * 2 + 60);
538 __gnat_decode (coded_name, ada_name, 0);
540 if (verbosity == 2 && !DECL_IS_BUILTIN (decl))
542 Set_Identifier_Casing (ada_name, DECL_SOURCE_FILE (decl));
543 return ggc_strdup (Name_Buffer);
549 /* Return the name to be used in DWARF debug info for DECL. */
552 gnat_dwarf_name (tree decl, int verbosity ATTRIBUTE_UNUSED)
554 gcc_assert (DECL_P (decl));
555 return (const char *) IDENTIFIER_POINTER (DECL_NAME (decl));
558 /* Return the descriptive type associated with TYPE, if any. */
561 gnat_descriptive_type (const_tree type)
563 if (TYPE_STUB_DECL (type))
564 return DECL_PARALLEL_TYPE (TYPE_STUB_DECL (type));
569 /* Return true if types T1 and T2 are identical for type hashing purposes.
570 Called only after doing all language independent checks. At present,
571 this function is only called when both types are FUNCTION_TYPE. */
574 gnat_type_hash_eq (const_tree t1, const_tree t2)
576 gcc_assert (TREE_CODE (t1) == FUNCTION_TYPE);
577 return fntype_same_flags_p (t1, TYPE_CI_CO_LIST (t2),
578 TYPE_RETURN_UNCONSTRAINED_P (t2),
579 TYPE_RETURN_BY_DIRECT_REF_P (t2),
580 TREE_ADDRESSABLE (t2));
583 /* Do nothing (return the tree node passed). */
586 gnat_return_tree (tree t)
591 /* Get the alias set corresponding to a type or expression. */
593 static alias_set_type
594 gnat_get_alias_set (tree type)
596 /* If this is a padding type, use the type of the first field. */
597 if (TYPE_IS_PADDING_P (type))
598 return get_alias_set (TREE_TYPE (TYPE_FIELDS (type)));
600 /* If the type is an unconstrained array, use the type of the
601 self-referential array we make. */
602 else if (TREE_CODE (type) == UNCONSTRAINED_ARRAY_TYPE)
604 get_alias_set (TREE_TYPE (TREE_TYPE (TYPE_FIELDS (TREE_TYPE (type)))));
606 /* If the type can alias any other types, return the alias set 0. */
607 else if (TYPE_P (type) && TYPE_UNIVERSAL_ALIASING_P (type))
613 /* GNU_TYPE is a type. Return its maximum size in bytes, if known,
614 as a constant when possible. */
617 gnat_type_max_size (const_tree gnu_type)
619 /* First see what we can get from TYPE_SIZE_UNIT, which might not
620 be constant even for simple expressions if it has already been
621 elaborated and possibly replaced by a VAR_DECL. */
622 tree max_unitsize = max_size (TYPE_SIZE_UNIT (gnu_type), true);
624 /* If we don't have a constant, see what we can get from TYPE_ADA_SIZE,
625 which should stay untouched. */
626 if (!tree_fits_uhwi_p (max_unitsize)
627 && RECORD_OR_UNION_TYPE_P (gnu_type)
628 && !TYPE_FAT_POINTER_P (gnu_type)
629 && TYPE_ADA_SIZE (gnu_type))
631 tree max_adasize = max_size (TYPE_ADA_SIZE (gnu_type), true);
633 /* If we have succeeded in finding a constant, round it up to the
634 type's alignment and return the result in units. */
635 if (tree_fits_uhwi_p (max_adasize))
637 = size_binop (CEIL_DIV_EXPR,
638 round_up (max_adasize, TYPE_ALIGN (gnu_type)),
645 /* Provide information in INFO for debug output about the TYPE array type.
646 Return whether TYPE is handled. */
649 gnat_get_array_descr_info (const_tree type, struct array_descr_info *info)
651 bool convention_fortran_p;
654 const_tree dimen = NULL_TREE;
655 const_tree last_dimen = NULL_TREE;
658 if (TREE_CODE (type) != ARRAY_TYPE
659 || !TYPE_DOMAIN (type)
660 || !TYPE_INDEX_TYPE (TYPE_DOMAIN (type)))
663 /* Count how many dimentions this array has. */
664 for (i = 0, dimen = type; ; ++i, dimen = TREE_TYPE (dimen))
666 && (TREE_CODE (dimen) != ARRAY_TYPE
667 || !TYPE_MULTI_ARRAY_P (dimen)))
669 info->ndimensions = i;
670 convention_fortran_p = TYPE_CONVENTION_FORTRAN_P (type);
672 /* TODO: For row major ordering, we probably want to emit nothing and
673 instead specify it as the default in Dw_TAG_compile_unit. */
674 info->ordering = (convention_fortran_p
675 ? array_descr_ordering_column_major
676 : array_descr_ordering_row_major);
677 info->base_decl = NULL_TREE;
678 info->data_location = NULL_TREE;
679 info->allocated = NULL_TREE;
680 info->associated = NULL_TREE;
682 for (i = (convention_fortran_p ? info->ndimensions - 1 : 0),
685 0 <= i && i < info->ndimensions;
687 i += (convention_fortran_p ? -1 : 1),
688 dimen = TREE_TYPE (dimen))
690 /* We are interested in the stored bounds for the debug info. */
691 index_type = TYPE_INDEX_TYPE (TYPE_DOMAIN (dimen));
693 info->dimen[i].bounds_type = index_type;
694 info->dimen[i].lower_bound = TYPE_MIN_VALUE (index_type);
695 info->dimen[i].upper_bound = TYPE_MAX_VALUE (index_type);
699 info->element_type = TREE_TYPE (last_dimen);
704 /* GNU_TYPE is a subtype of an integral type. Set LOWVAL to the low bound
705 and HIGHVAL to the high bound, respectively. */
708 gnat_get_subrange_bounds (const_tree gnu_type, tree *lowval, tree *highval)
710 *lowval = TYPE_MIN_VALUE (gnu_type);
711 *highval = TYPE_MAX_VALUE (gnu_type);
714 /* GNU_TYPE is the type of a subprogram parameter. Determine if it should be
715 passed by reference by default. */
718 default_pass_by_ref (tree gnu_type)
720 /* We pass aggregates by reference if they are sufficiently large for
721 their alignment. The ratio is somewhat arbitrary. We also pass by
722 reference if the target machine would either pass or return by
723 reference. Strictly speaking, we need only check the return if this
724 is an In Out parameter, but it's probably best to err on the side of
725 passing more things by reference. */
727 if (pass_by_reference (NULL, TYPE_MODE (gnu_type), gnu_type, true))
730 if (targetm.calls.return_in_memory (gnu_type, NULL_TREE))
733 if (AGGREGATE_TYPE_P (gnu_type)
734 && (!valid_constant_size_p (TYPE_SIZE_UNIT (gnu_type))
735 || 0 < compare_tree_int (TYPE_SIZE_UNIT (gnu_type),
736 TYPE_ALIGN (gnu_type))))
742 /* GNU_TYPE is the type of a subprogram parameter. Determine if it must be
743 passed by reference. */
746 must_pass_by_ref (tree gnu_type)
748 /* We pass only unconstrained objects, those required by the language
749 to be passed by reference, and objects of variable size. The latter
750 is more efficient, avoids problems with variable size temporaries,
751 and does not produce compatibility problems with C, since C does
752 not have such objects. */
753 return (TREE_CODE (gnu_type) == UNCONSTRAINED_ARRAY_TYPE
754 || TYPE_IS_BY_REFERENCE_P (gnu_type)
755 || (TYPE_SIZE_UNIT (gnu_type)
756 && TREE_CODE (TYPE_SIZE_UNIT (gnu_type)) != INTEGER_CST));
759 /* This function is called by the front-end to enumerate all the supported
760 modes for the machine, as well as some predefined C types. F is a function
761 which is called back with the parameters as listed below, first a string,
762 then seven ints. The name is any arbitrary null-terminated string and has
763 no particular significance, except for the case of predefined C types, where
764 it should be the name of the C type. For integer types, only signed types
765 should be listed, unsigned versions are assumed. The order of types should
766 be in order of preference, with the smallest/cheapest types first.
768 In particular, C predefined types should be listed before other types,
769 binary floating point types before decimal ones, and narrower/cheaper
770 type versions before more expensive ones. In type selection the first
771 matching variant will be used.
773 NAME pointer to first char of type name
774 DIGS number of decimal digits for floating-point modes, else 0
775 COMPLEX_P nonzero is this represents a complex mode
776 COUNT count of number of items, nonzero for vector mode
777 FLOAT_REP Float_Rep_Kind for FP, otherwise undefined
778 PRECISION number of bits used to store data
779 SIZE number of bits occupied by the mode
780 ALIGN number of bits to which mode is aligned. */
783 enumerate_modes (void (*f) (const char *, int, int, int, int, int, int, int))
786 = { float_type_node, double_type_node, long_double_type_node };
787 const char *const c_names[]
788 = { "float", "double", "long double" };
791 /* We are going to compute it below. */
792 fp_arith_may_widen = false;
794 for (iloop = 0; iloop < NUM_MACHINE_MODES; iloop++)
796 machine_mode i = (machine_mode) iloop;
797 machine_mode inner_mode = i;
798 bool float_p = false;
799 bool complex_p = false;
800 bool vector_p = false;
803 unsigned int nameloop;
804 Float_Rep_Kind float_rep = IEEE_Binary; /* Until proven otherwise */
806 switch (GET_MODE_CLASS (i))
813 case MODE_COMPLEX_INT:
815 inner_mode = GET_MODE_INNER (i);
817 case MODE_COMPLEX_FLOAT:
820 inner_mode = GET_MODE_INNER (i);
822 case MODE_VECTOR_INT:
824 inner_mode = GET_MODE_INNER (i);
826 case MODE_VECTOR_FLOAT:
829 inner_mode = GET_MODE_INNER (i);
837 const struct real_format *fmt = REAL_MODE_FORMAT (inner_mode);
839 /* ??? Cope with the ghost XFmode of the ARM port. */
843 /* Be conservative and consider that floating-point arithmetics may
844 use wider intermediate results as soon as there is an extended
845 Motorola or Intel mode supported by the machine. */
846 if (fmt == &ieee_extended_motorola_format
847 || fmt == &ieee_extended_intel_96_format
848 || fmt == &ieee_extended_intel_96_round_53_format
849 || fmt == &ieee_extended_intel_128_format)
851 #ifdef TARGET_FPMATH_DEFAULT
852 if (TARGET_FPMATH_DEFAULT == FPMATH_387)
854 fp_arith_may_widen = true;
858 digs = (fmt->p - 1) * 1233 / 4096; /* scale by log (2) */
860 else if (fmt->b == 10)
867 /* First register any C types for this mode that the front end
868 may need to know about, unless the mode should be skipped. */
869 if (!skip_p && !vector_p)
870 for (nameloop = 0; nameloop < ARRAY_SIZE (c_types); nameloop++)
872 tree type = c_types[nameloop];
873 const char *name = c_names[nameloop];
875 if (TYPE_MODE (type) == i)
877 f (name, digs, complex_p, 0, float_rep, TYPE_PRECISION (type),
878 TREE_INT_CST_LOW (TYPE_SIZE (type)), TYPE_ALIGN (type));
883 /* If no predefined C types were found, register the mode itself. */
885 f (GET_MODE_NAME (i), digs, complex_p,
886 vector_p ? GET_MODE_NUNITS (i) : 0, float_rep,
887 GET_MODE_PRECISION (i), GET_MODE_BITSIZE (i),
888 GET_MODE_ALIGNMENT (i));
892 /* Return the size of the FP mode with precision PREC. */
895 fp_prec_to_size (int prec)
899 for (mode = GET_CLASS_NARROWEST_MODE (MODE_FLOAT); mode != VOIDmode;
900 mode = GET_MODE_WIDER_MODE (mode))
901 if (GET_MODE_PRECISION (mode) == prec)
902 return GET_MODE_BITSIZE (mode);
907 /* Return the precision of the FP mode with size SIZE. */
910 fp_size_to_prec (int size)
914 for (mode = GET_CLASS_NARROWEST_MODE (MODE_FLOAT); mode != VOIDmode;
915 mode = GET_MODE_WIDER_MODE (mode))
916 if (GET_MODE_BITSIZE (mode) == size)
917 return GET_MODE_PRECISION (mode);
922 static GTY(()) tree gnat_eh_personality_decl;
924 /* Return the GNAT personality function decl. */
927 gnat_eh_personality (void)
929 if (!gnat_eh_personality_decl)
930 gnat_eh_personality_decl = build_personality_function ("gnat");
931 return gnat_eh_personality_decl;
934 /* Initialize language-specific bits of tree_contains_struct. */
939 MARK_TS_COMMON (UNCONSTRAINED_ARRAY_TYPE);
941 MARK_TS_TYPED (UNCONSTRAINED_ARRAY_REF);
942 MARK_TS_TYPED (NULL_EXPR);
943 MARK_TS_TYPED (PLUS_NOMOD_EXPR);
944 MARK_TS_TYPED (MINUS_NOMOD_EXPR);
945 MARK_TS_TYPED (ATTR_ADDR_EXPR);
946 MARK_TS_TYPED (STMT_STMT);
947 MARK_TS_TYPED (LOOP_STMT);
948 MARK_TS_TYPED (EXIT_STMT);
951 /* Definitions for our language-specific hooks. */
953 #undef LANG_HOOKS_NAME
954 #define LANG_HOOKS_NAME "GNU Ada"
955 #undef LANG_HOOKS_IDENTIFIER_SIZE
956 #define LANG_HOOKS_IDENTIFIER_SIZE sizeof (struct tree_identifier)
957 #undef LANG_HOOKS_INIT
958 #define LANG_HOOKS_INIT gnat_init
959 #undef LANG_HOOKS_OPTION_LANG_MASK
960 #define LANG_HOOKS_OPTION_LANG_MASK gnat_option_lang_mask
961 #undef LANG_HOOKS_INIT_OPTIONS_STRUCT
962 #define LANG_HOOKS_INIT_OPTIONS_STRUCT gnat_init_options_struct
963 #undef LANG_HOOKS_INIT_OPTIONS
964 #define LANG_HOOKS_INIT_OPTIONS gnat_init_options
965 #undef LANG_HOOKS_HANDLE_OPTION
966 #define LANG_HOOKS_HANDLE_OPTION gnat_handle_option
967 #undef LANG_HOOKS_POST_OPTIONS
968 #define LANG_HOOKS_POST_OPTIONS gnat_post_options
969 #undef LANG_HOOKS_PARSE_FILE
970 #define LANG_HOOKS_PARSE_FILE gnat_parse_file
971 #undef LANG_HOOKS_TYPE_HASH_EQ
972 #define LANG_HOOKS_TYPE_HASH_EQ gnat_type_hash_eq
973 #undef LANG_HOOKS_GETDECLS
974 #define LANG_HOOKS_GETDECLS lhd_return_null_tree_v
975 #undef LANG_HOOKS_PUSHDECL
976 #define LANG_HOOKS_PUSHDECL gnat_return_tree
977 #undef LANG_HOOKS_WRITE_GLOBALS
978 #define LANG_HOOKS_WRITE_GLOBALS gnat_write_global_declarations
979 #undef LANG_HOOKS_GET_ALIAS_SET
980 #define LANG_HOOKS_GET_ALIAS_SET gnat_get_alias_set
981 #undef LANG_HOOKS_PRINT_DECL
982 #define LANG_HOOKS_PRINT_DECL gnat_print_decl
983 #undef LANG_HOOKS_PRINT_TYPE
984 #define LANG_HOOKS_PRINT_TYPE gnat_print_type
985 #undef LANG_HOOKS_TYPE_MAX_SIZE
986 #define LANG_HOOKS_TYPE_MAX_SIZE gnat_type_max_size
987 #undef LANG_HOOKS_DECL_PRINTABLE_NAME
988 #define LANG_HOOKS_DECL_PRINTABLE_NAME gnat_printable_name
989 #undef LANG_HOOKS_DWARF_NAME
990 #define LANG_HOOKS_DWARF_NAME gnat_dwarf_name
991 #undef LANG_HOOKS_GIMPLIFY_EXPR
992 #define LANG_HOOKS_GIMPLIFY_EXPR gnat_gimplify_expr
993 #undef LANG_HOOKS_TYPE_FOR_MODE
994 #define LANG_HOOKS_TYPE_FOR_MODE gnat_type_for_mode
995 #undef LANG_HOOKS_TYPE_FOR_SIZE
996 #define LANG_HOOKS_TYPE_FOR_SIZE gnat_type_for_size
997 #undef LANG_HOOKS_TYPES_COMPATIBLE_P
998 #define LANG_HOOKS_TYPES_COMPATIBLE_P gnat_types_compatible_p
999 #undef LANG_HOOKS_GET_ARRAY_DESCR_INFO
1000 #define LANG_HOOKS_GET_ARRAY_DESCR_INFO gnat_get_array_descr_info
1001 #undef LANG_HOOKS_GET_SUBRANGE_BOUNDS
1002 #define LANG_HOOKS_GET_SUBRANGE_BOUNDS gnat_get_subrange_bounds
1003 #undef LANG_HOOKS_DESCRIPTIVE_TYPE
1004 #define LANG_HOOKS_DESCRIPTIVE_TYPE gnat_descriptive_type
1005 #undef LANG_HOOKS_ATTRIBUTE_TABLE
1006 #define LANG_HOOKS_ATTRIBUTE_TABLE gnat_internal_attribute_table
1007 #undef LANG_HOOKS_BUILTIN_FUNCTION
1008 #define LANG_HOOKS_BUILTIN_FUNCTION gnat_builtin_function
1009 #undef LANG_HOOKS_EH_PERSONALITY
1010 #define LANG_HOOKS_EH_PERSONALITY gnat_eh_personality
1011 #undef LANG_HOOKS_DEEP_UNSHARING
1012 #define LANG_HOOKS_DEEP_UNSHARING true
1013 #undef LANG_HOOKS_INIT_TS
1014 #define LANG_HOOKS_INIT_TS gnat_init_ts
1016 struct lang_hooks lang_hooks = LANG_HOOKS_INITIALIZER;
1018 #include "gt-ada-misc.h"