1 /****************************************************************************
3 * GNAT COMPILER COMPONENTS *
7 * C Implementation File *
9 * Copyright (C) 1992-2014, 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"
33 #include "stor-layout.h"
34 #include "print-tree.h"
35 #include "diagnostic.h"
41 #include "langhooks.h"
42 #include "langhooks-def.h"
49 #include "hard-reg-set.h"
51 #include "function.h" /* For pass_by_reference. */
52 #include "dwarf2out.h"
55 #include "adadecode.h"
69 /* This symbol needs to be defined for the front-end. */
70 void *callgraph_info_file
= NULL
;
72 /* Command-line argc and argv. These variables are global since they are
73 imported in back_end.adb. */
74 unsigned int save_argc
;
75 const char **save_argv
;
77 /* GNAT argc and argv. */
79 extern char **gnat_argv
;
85 /* Declare functions we use as part of startup. */
86 extern void __gnat_initialize (void *);
87 extern void __gnat_install_SEH_handler (void *);
88 extern void adainit (void);
89 extern void _ada_gnat1drv (void);
95 /* The parser for the language. For us, we process the GNAT tree. */
98 gnat_parse_file (void)
102 /* Call the target specific initializations. */
103 __gnat_initialize (NULL
);
105 /* ??? Call the SEH initialization routine. This is to workaround
106 a bootstrap path problem. The call below should be removed at some
107 point and the SEH pointer passed to __gnat_initialize() above. */
108 __gnat_install_SEH_handler((void *)seh
);
110 /* Call the front-end elaboration procedures. */
113 /* Call the front end. */
117 /* Return language mask for option processing. */
120 gnat_option_lang_mask (void)
125 /* Decode all the language specific options that cannot be decoded by GCC.
126 The option decoding phase of GCC calls this routine on the flags that
127 are marked as Ada-specific. Return true on success or false on failure. */
130 gnat_handle_option (size_t scode
, const char *arg ATTRIBUTE_UNUSED
, int value
,
131 int kind ATTRIBUTE_UNUSED
, location_t loc ATTRIBUTE_UNUSED
,
132 const struct cl_option_handlers
*handlers ATTRIBUTE_UNUSED
)
134 enum opt_code code
= (enum opt_code
) scode
;
139 handle_generated_option (&global_options
, &global_options_set
,
140 OPT_Wunused
, NULL
, value
,
141 gnat_option_lang_mask (), kind
, loc
,
142 handlers
, global_dc
);
143 warn_uninitialized
= value
;
144 warn_maybe_uninitialized
= value
;
148 warning (0, "%<-gnat%> misspelled as %<-gant%>");
150 /* ... fall through ... */
158 /* These are handled by the front-end. */
161 case OPT_fshort_enums
:
162 /* This is handled by the middle-end. */
169 Ada_handle_option_auto (&global_options
, &global_options_set
,
171 gnat_option_lang_mask (), kind
,
172 loc
, handlers
, global_dc
);
176 /* Initialize options structure OPTS. */
179 gnat_init_options_struct (struct gcc_options
*opts
)
181 /* Uninitialized really means uninitialized in Ada. */
182 opts
->x_flag_zero_initialized_in_bss
= 0;
184 /* We don't care about errno in Ada and it causes __builtin_sqrt to
185 call the libm function rather than do it inline. */
186 opts
->x_flag_errno_math
= 0;
187 opts
->frontend_set_flag_errno_math
= true;
190 /* Initialize for option processing. */
193 gnat_init_options (unsigned int decoded_options_count
,
194 struct cl_decoded_option
*decoded_options
)
196 /* Reconstruct an argv array for use of back_end.adb.
198 ??? back_end.adb should not rely on this; instead, it should work with
199 decoded options without such reparsing, to ensure consistency in how
200 options are decoded. */
203 save_argv
= XNEWVEC (const char *, 2 * decoded_options_count
+ 1);
205 for (i
= 0; i
< decoded_options_count
; i
++)
207 size_t num_elements
= decoded_options
[i
].canonical_option_num_elements
;
209 if (decoded_options
[i
].errors
210 || decoded_options
[i
].opt_index
== OPT_SPECIAL_unknown
211 || num_elements
== 0)
214 /* Deal with -I- specially since it must be a single switch. */
215 if (decoded_options
[i
].opt_index
== OPT_I
217 && decoded_options
[i
].canonical_option
[1][0] == '-'
218 && decoded_options
[i
].canonical_option
[1][1] == '\0')
219 save_argv
[save_argc
++] = "-I-";
222 gcc_assert (num_elements
>= 1 && num_elements
<= 2);
223 save_argv
[save_argc
++] = decoded_options
[i
].canonical_option
[0];
224 if (num_elements
>= 2)
225 save_argv
[save_argc
++] = decoded_options
[i
].canonical_option
[1];
228 save_argv
[save_argc
] = NULL
;
230 gnat_argv
= (char **) xmalloc (sizeof (save_argv
[0]));
231 gnat_argv
[0] = xstrdup (save_argv
[0]); /* name of the command */
235 /* Ada code requires variables for these settings rather than elements
236 of the global_options structure. */
239 #undef flag_compare_debug
240 #undef flag_short_enums
241 #undef flag_stack_check
242 int gnat_encodings
= 0;
245 int flag_compare_debug
;
246 int flag_short_enums
;
247 enum stack_check_type flag_stack_check
= NO_STACK_CHECK
;
249 /* Settings adjustments after switches processing by the back-end.
250 Note that the front-end switches processing (Scan_Compiler_Arguments)
251 has not been done yet at this point! */
254 gnat_post_options (const char **pfilename ATTRIBUTE_UNUSED
)
256 /* Excess precision other than "fast" requires front-end support. */
257 if (flag_excess_precision_cmdline
== EXCESS_PRECISION_STANDARD
258 && TARGET_FLT_EVAL_METHOD_NON_DEFAULT
)
259 sorry ("-fexcess-precision=standard for Ada");
260 flag_excess_precision_cmdline
= EXCESS_PRECISION_FAST
;
262 /* ??? The warning machinery is outsmarted by Ada. */
263 warn_unused_parameter
= 0;
265 /* No psABI change warnings for Ada. */
268 /* No caret by default for Ada. */
269 if (!global_options_set
.x_flag_diagnostics_show_caret
)
270 global_dc
->show_caret
= false;
272 optimize
= global_options
.x_optimize
;
273 optimize_size
= global_options
.x_optimize_size
;
274 flag_compare_debug
= global_options
.x_flag_compare_debug
;
275 flag_stack_check
= global_options
.x_flag_stack_check
;
276 flag_short_enums
= global_options
.x_flag_short_enums
;
278 /* Unfortunately the post_options hook is called before the value of
279 flag_short_enums is autodetected, if need be. Mimic the process
280 for our private flag_short_enums. */
281 if (flag_short_enums
== 2)
282 flag_short_enums
= targetm
.default_short_enums ();
287 /* Here is the function to handle the compiler error processing in GCC. */
290 internal_error_function (diagnostic_context
*context
,
291 const char *msgid
, va_list *ap
)
294 char *buffer
, *p
, *loc
;
295 String_Template temp
, temp_loc
;
296 String_Pointer sp
, sp_loc
;
297 expanded_location xloc
;
299 /* Warn if plugins present. */
302 /* Reset the pretty-printer. */
303 pp_clear_output_area (context
->printer
);
305 /* Format the message into the pretty-printer. */
306 tinfo
.format_spec
= msgid
;
308 tinfo
.err_no
= errno
;
309 pp_format_verbatim (context
->printer
, &tinfo
);
311 /* Extract a (writable) pointer to the formatted text. */
312 buffer
= xstrdup (pp_formatted_text (context
->printer
));
314 /* Go up to the first newline. */
315 for (p
= buffer
; *p
; p
++)
323 temp
.High_Bound
= p
- buffer
;
327 xloc
= expand_location (input_location
);
328 if (context
->show_column
&& xloc
.column
!= 0)
329 loc
= xasprintf ("%s:%d:%d", xloc
.file
, xloc
.line
, xloc
.column
);
331 loc
= xasprintf ("%s:%d", xloc
.file
, xloc
.line
);
332 temp_loc
.Low_Bound
= 1;
333 temp_loc
.High_Bound
= strlen (loc
);
334 sp_loc
.Bounds
= &temp_loc
;
337 Current_Error_Node
= error_gnat_node
;
338 Compiler_Abort (sp
, sp_loc
, true);
341 /* Perform all the initialization steps that are language-specific. */
346 /* Do little here, most of the standard declarations are set up after the
347 front-end has been run. Use the same `char' as C, this doesn't really
348 matter since we'll use the explicit `unsigned char' for Character. */
349 build_common_tree_nodes (flag_signed_char
, false);
351 /* In Ada, we use an unsigned 8-bit type for the default boolean type. */
352 boolean_type_node
= make_unsigned_type (8);
353 TREE_SET_CODE (boolean_type_node
, BOOLEAN_TYPE
);
354 SET_TYPE_RM_MAX_VALUE (boolean_type_node
,
355 build_int_cst (boolean_type_node
, 1));
356 SET_TYPE_RM_SIZE (boolean_type_node
, bitsize_int (1));
357 boolean_true_node
= TYPE_MAX_VALUE (boolean_type_node
);
358 boolean_false_node
= TYPE_MIN_VALUE (boolean_type_node
);
360 sbitsize_one_node
= sbitsize_int (1);
361 sbitsize_unit_node
= sbitsize_int (BITS_PER_UNIT
);
363 ptr_void_type_node
= build_pointer_type (void_type_node
);
365 /* Show that REFERENCE_TYPEs are internal and should be Pmode. */
366 internal_reference_types ();
368 /* Register our internal error function. */
369 global_dc
->internal_error
= &internal_error_function
;
374 /* Initialize the GCC support for exception handling. */
377 gnat_init_gcc_eh (void)
379 /* We shouldn't do anything if the No_Exceptions_Handler pragma is set,
380 though. This could for instance lead to the emission of tables with
381 references to symbols (such as the Ada eh personality routine) within
382 libraries we won't link against. */
383 if (No_Exception_Handlers_Set ())
386 /* Tell GCC we are handling cleanup actions through exception propagation.
387 This opens possibilities that we don't take advantage of yet, but is
388 nonetheless necessary to ensure that fixup code gets assigned to the
389 right exception regions. */
390 using_eh_for_cleanups ();
392 /* Turn on -fexceptions, -fnon-call-exceptions and -fdelete-dead-exceptions.
393 The first one triggers the generation of the necessary exception tables.
394 The second one is useful for two reasons: 1/ we map some asynchronous
395 signals like SEGV to exceptions, so we need to ensure that the insns
396 which can lead to such signals are correctly attached to the exception
397 region they pertain to, 2/ some calls to pure subprograms are handled as
398 libcall blocks and then marked as "cannot trap" if the flag is not set
399 (see emit_libcall_block). We should not let this be since it is possible
400 for such calls to actually raise in Ada.
401 The third one is an optimization that makes it possible to delete dead
402 instructions that may throw exceptions, most notably loads and stores,
403 as permitted in Ada. */
405 flag_non_call_exceptions
= 1;
406 flag_delete_dead_exceptions
= 1;
411 /* Initialize the GCC support for floating-point operations. */
414 gnat_init_gcc_fp (void)
416 /* Disable FP optimizations that ignore the signedness of zero if
417 S'Signed_Zeros is true, but don't override the user if not. */
418 if (Signed_Zeros_On_Target
)
419 flag_signed_zeros
= 1;
420 else if (!global_options_set
.x_flag_signed_zeros
)
421 flag_signed_zeros
= 0;
423 /* Assume that FP operations can trap if S'Machine_Overflow is true,
424 but don't override the user if not. */
425 if (Machine_Overflows_On_Target
)
426 flag_trapping_math
= 1;
427 else if (!global_options_set
.x_flag_trapping_math
)
428 flag_trapping_math
= 0;
431 /* Print language-specific items in declaration NODE. */
434 gnat_print_decl (FILE *file
, tree node
, int indent
)
436 switch (TREE_CODE (node
))
439 print_node (file
, "corresponding var",
440 DECL_CONST_CORRESPONDING_VAR (node
), indent
+ 4);
444 print_node (file
, "original field", DECL_ORIGINAL_FIELD (node
),
449 if (DECL_LOOP_PARM_P (node
))
450 print_node (file
, "induction var", DECL_INDUCTION_VAR (node
),
453 print_node (file
, "renamed object", DECL_RENAMED_OBJECT (node
),
462 /* Print language-specific items in type NODE. */
465 gnat_print_type (FILE *file
, tree node
, int indent
)
467 switch (TREE_CODE (node
))
470 print_node (file
, "ci/co list", TYPE_CI_CO_LIST (node
), indent
+ 4);
474 if (TYPE_MODULAR_P (node
))
475 print_node_brief (file
, "modulus", TYPE_MODULUS (node
), indent
+ 4);
476 else if (TYPE_HAS_ACTUAL_BOUNDS_P (node
))
477 print_node (file
, "actual bounds", TYPE_ACTUAL_BOUNDS (node
),
480 print_node (file
, "index type", TYPE_INDEX_TYPE (node
), indent
+ 4);
482 /* ... fall through ... */
486 print_node_brief (file
, "RM size", TYPE_RM_SIZE (node
), indent
+ 4);
488 /* ... fall through ... */
491 print_node_brief (file
, "RM min", TYPE_RM_MIN_VALUE (node
), indent
+ 4);
492 print_node_brief (file
, "RM max", TYPE_RM_MAX_VALUE (node
), indent
+ 4);
496 print_node (file
,"actual bounds", TYPE_ACTUAL_BOUNDS (node
), indent
+ 4);
500 print_node (file
,"representative array",
501 TYPE_REPRESENTATIVE_ARRAY (node
), indent
+ 4);
505 if (TYPE_FAT_POINTER_P (node
) || TYPE_CONTAINS_TEMPLATE_P (node
))
506 print_node (file
, "unconstrained array",
507 TYPE_UNCONSTRAINED_ARRAY (node
), indent
+ 4);
509 print_node (file
, "Ada size", TYPE_ADA_SIZE (node
), indent
+ 4);
513 case QUAL_UNION_TYPE
:
514 print_node (file
, "Ada size", TYPE_ADA_SIZE (node
), indent
+ 4);
522 /* Return the name to be printed for DECL. */
525 gnat_printable_name (tree decl
, int verbosity
)
527 const char *coded_name
= IDENTIFIER_POINTER (DECL_NAME (decl
));
528 char *ada_name
= (char *) ggc_alloc_atomic (strlen (coded_name
) * 2 + 60);
530 __gnat_decode (coded_name
, ada_name
, 0);
532 if (verbosity
== 2 && !DECL_IS_BUILTIN (decl
))
534 Set_Identifier_Casing (ada_name
, DECL_SOURCE_FILE (decl
));
535 return ggc_strdup (Name_Buffer
);
541 /* Return the name to be used in DWARF debug info for DECL. */
544 gnat_dwarf_name (tree decl
, int verbosity ATTRIBUTE_UNUSED
)
546 gcc_assert (DECL_P (decl
));
547 return (const char *) IDENTIFIER_POINTER (DECL_NAME (decl
));
550 /* Return the descriptive type associated with TYPE, if any. */
553 gnat_descriptive_type (const_tree type
)
555 if (TYPE_STUB_DECL (type
))
556 return DECL_PARALLEL_TYPE (TYPE_STUB_DECL (type
));
561 /* Return true if types T1 and T2 are identical for type hashing purposes.
562 Called only after doing all language independent checks. At present,
563 this function is only called when both types are FUNCTION_TYPE. */
566 gnat_type_hash_eq (const_tree t1
, const_tree t2
)
568 gcc_assert (TREE_CODE (t1
) == FUNCTION_TYPE
);
569 return fntype_same_flags_p (t1
, TYPE_CI_CO_LIST (t2
),
570 TYPE_RETURN_UNCONSTRAINED_P (t2
),
571 TYPE_RETURN_BY_DIRECT_REF_P (t2
),
572 TREE_ADDRESSABLE (t2
));
575 /* Do nothing (return the tree node passed). */
578 gnat_return_tree (tree t
)
583 /* Get the alias set corresponding to a type or expression. */
585 static alias_set_type
586 gnat_get_alias_set (tree type
)
588 /* If this is a padding type, use the type of the first field. */
589 if (TYPE_IS_PADDING_P (type
))
590 return get_alias_set (TREE_TYPE (TYPE_FIELDS (type
)));
592 /* If the type is an unconstrained array, use the type of the
593 self-referential array we make. */
594 else if (TREE_CODE (type
) == UNCONSTRAINED_ARRAY_TYPE
)
596 get_alias_set (TREE_TYPE (TREE_TYPE (TYPE_FIELDS (TREE_TYPE (type
)))));
598 /* If the type can alias any other types, return the alias set 0. */
599 else if (TYPE_P (type
)
600 && TYPE_UNIVERSAL_ALIASING_P (TYPE_MAIN_VARIANT (type
)))
606 /* GNU_TYPE is a type. Return its maximum size in bytes, if known,
607 as a constant when possible. */
610 gnat_type_max_size (const_tree gnu_type
)
612 /* First see what we can get from TYPE_SIZE_UNIT, which might not
613 be constant even for simple expressions if it has already been
614 elaborated and possibly replaced by a VAR_DECL. */
615 tree max_unitsize
= max_size (TYPE_SIZE_UNIT (gnu_type
), true);
617 /* If we don't have a constant, see what we can get from TYPE_ADA_SIZE,
618 which should stay untouched. */
619 if (!tree_fits_uhwi_p (max_unitsize
)
620 && RECORD_OR_UNION_TYPE_P (gnu_type
)
621 && !TYPE_FAT_POINTER_P (gnu_type
)
622 && TYPE_ADA_SIZE (gnu_type
))
624 tree max_adasize
= max_size (TYPE_ADA_SIZE (gnu_type
), true);
626 /* If we have succeeded in finding a constant, round it up to the
627 type's alignment and return the result in units. */
628 if (tree_fits_uhwi_p (max_adasize
))
630 = size_binop (CEIL_DIV_EXPR
,
631 round_up (max_adasize
, TYPE_ALIGN (gnu_type
)),
638 /* Provide information in INFO for debug output about the TYPE array type.
639 Return whether TYPE is handled. */
642 gnat_get_array_descr_info (const_tree type
, struct array_descr_info
*info
)
644 bool convention_fortran_p
;
647 const_tree dimen
= NULL_TREE
;
648 const_tree last_dimen
= NULL_TREE
;
651 if (TREE_CODE (type
) != ARRAY_TYPE
652 || !TYPE_DOMAIN (type
)
653 || !TYPE_INDEX_TYPE (TYPE_DOMAIN (type
)))
656 /* Count how many dimentions this array has. */
657 for (i
= 0, dimen
= type
; ; ++i
, dimen
= TREE_TYPE (dimen
))
659 && (TREE_CODE (dimen
) != ARRAY_TYPE
660 || !TYPE_MULTI_ARRAY_P (dimen
)))
662 info
->ndimensions
= i
;
663 convention_fortran_p
= TYPE_CONVENTION_FORTRAN_P (type
);
665 /* TODO: For row major ordering, we probably want to emit nothing and
666 instead specify it as the default in Dw_TAG_compile_unit. */
667 info
->ordering
= (convention_fortran_p
668 ? array_descr_ordering_column_major
669 : array_descr_ordering_row_major
);
670 info
->base_decl
= NULL_TREE
;
671 info
->data_location
= NULL_TREE
;
672 info
->allocated
= NULL_TREE
;
673 info
->associated
= NULL_TREE
;
675 for (i
= (convention_fortran_p
? info
->ndimensions
- 1 : 0),
678 0 <= i
&& i
< info
->ndimensions
;
680 i
+= (convention_fortran_p
? -1 : 1),
681 dimen
= TREE_TYPE (dimen
))
683 /* We are interested in the stored bounds for the debug info. */
684 index_type
= TYPE_INDEX_TYPE (TYPE_DOMAIN (dimen
));
686 info
->dimen
[i
].bounds_type
= index_type
;
687 info
->dimen
[i
].lower_bound
= TYPE_MIN_VALUE (index_type
);
688 info
->dimen
[i
].upper_bound
= TYPE_MAX_VALUE (index_type
);
692 info
->element_type
= TREE_TYPE (last_dimen
);
697 /* GNU_TYPE is a subtype of an integral type. Set LOWVAL to the low bound
698 and HIGHVAL to the high bound, respectively. */
701 gnat_get_subrange_bounds (const_tree gnu_type
, tree
*lowval
, tree
*highval
)
703 *lowval
= TYPE_MIN_VALUE (gnu_type
);
704 *highval
= TYPE_MAX_VALUE (gnu_type
);
707 /* GNU_TYPE is the type of a subprogram parameter. Determine if it should be
708 passed by reference by default. */
711 default_pass_by_ref (tree gnu_type
)
713 /* We pass aggregates by reference if they are sufficiently large for
714 their alignment. The ratio is somewhat arbitrary. We also pass by
715 reference if the target machine would either pass or return by
716 reference. Strictly speaking, we need only check the return if this
717 is an In Out parameter, but it's probably best to err on the side of
718 passing more things by reference. */
720 if (pass_by_reference (NULL
, TYPE_MODE (gnu_type
), gnu_type
, true))
723 if (targetm
.calls
.return_in_memory (gnu_type
, NULL_TREE
))
726 if (AGGREGATE_TYPE_P (gnu_type
)
727 && (!valid_constant_size_p (TYPE_SIZE_UNIT (gnu_type
))
728 || 0 < compare_tree_int (TYPE_SIZE_UNIT (gnu_type
),
729 TYPE_ALIGN (gnu_type
))))
735 /* GNU_TYPE is the type of a subprogram parameter. Determine if it must be
736 passed by reference. */
739 must_pass_by_ref (tree gnu_type
)
741 /* We pass only unconstrained objects, those required by the language
742 to be passed by reference, and objects of variable size. The latter
743 is more efficient, avoids problems with variable size temporaries,
744 and does not produce compatibility problems with C, since C does
745 not have such objects. */
746 return (TREE_CODE (gnu_type
) == UNCONSTRAINED_ARRAY_TYPE
747 || TYPE_IS_BY_REFERENCE_P (gnu_type
)
748 || (TYPE_SIZE_UNIT (gnu_type
)
749 && TREE_CODE (TYPE_SIZE_UNIT (gnu_type
)) != INTEGER_CST
));
752 /* This function is called by the front-end to enumerate all the supported
753 modes for the machine, as well as some predefined C types. F is a function
754 which is called back with the parameters as listed below, first a string,
755 then seven ints. The name is any arbitrary null-terminated string and has
756 no particular significance, except for the case of predefined C types, where
757 it should be the name of the C type. For integer types, only signed types
758 should be listed, unsigned versions are assumed. The order of types should
759 be in order of preference, with the smallest/cheapest types first.
761 In particular, C predefined types should be listed before other types,
762 binary floating point types before decimal ones, and narrower/cheaper
763 type versions before more expensive ones. In type selection the first
764 matching variant will be used.
766 NAME pointer to first char of type name
767 DIGS number of decimal digits for floating-point modes, else 0
768 COMPLEX_P nonzero is this represents a complex mode
769 COUNT count of number of items, nonzero for vector mode
770 FLOAT_REP Float_Rep_Kind for FP, otherwise undefined
771 PRECISION number of bits used to store data
772 SIZE number of bits occupied by the mode
773 ALIGN number of bits to which mode is aligned. */
776 enumerate_modes (void (*f
) (const char *, int, int, int, int, int, int, int))
779 = { float_type_node
, double_type_node
, long_double_type_node
};
780 const char *const c_names
[]
781 = { "float", "double", "long double" };
784 /* We are going to compute it below. */
785 fp_arith_may_widen
= false;
787 for (iloop
= 0; iloop
< NUM_MACHINE_MODES
; iloop
++)
789 machine_mode i
= (machine_mode
) iloop
;
790 machine_mode inner_mode
= i
;
791 bool float_p
= false;
792 bool complex_p
= false;
793 bool vector_p
= false;
796 unsigned int nameloop
;
797 Float_Rep_Kind float_rep
= IEEE_Binary
; /* Until proven otherwise */
799 switch (GET_MODE_CLASS (i
))
806 case MODE_COMPLEX_INT
:
808 inner_mode
= GET_MODE_INNER (i
);
810 case MODE_COMPLEX_FLOAT
:
813 inner_mode
= GET_MODE_INNER (i
);
815 case MODE_VECTOR_INT
:
817 inner_mode
= GET_MODE_INNER (i
);
819 case MODE_VECTOR_FLOAT
:
822 inner_mode
= GET_MODE_INNER (i
);
830 const struct real_format
*fmt
= REAL_MODE_FORMAT (inner_mode
);
832 /* ??? Cope with the ghost XFmode of the ARM port. */
836 /* Be conservative and consider that floating-point arithmetics may
837 use wider intermediate results as soon as there is an extended
838 Motorola or Intel mode supported by the machine. */
839 if (fmt
== &ieee_extended_motorola_format
840 || fmt
== &ieee_extended_intel_96_format
841 || fmt
== &ieee_extended_intel_96_round_53_format
842 || fmt
== &ieee_extended_intel_128_format
)
843 fp_arith_may_widen
= true;
846 digs
= (fmt
->p
- 1) * 1233 / 4096; /* scale by log (2) */
848 else if (fmt
->b
== 10)
855 /* First register any C types for this mode that the front end
856 may need to know about, unless the mode should be skipped. */
857 if (!skip_p
&& !vector_p
)
858 for (nameloop
= 0; nameloop
< ARRAY_SIZE (c_types
); nameloop
++)
860 tree type
= c_types
[nameloop
];
861 const char *name
= c_names
[nameloop
];
863 if (TYPE_MODE (type
) == i
)
865 f (name
, digs
, complex_p
, 0, float_rep
, TYPE_PRECISION (type
),
866 TREE_INT_CST_LOW (TYPE_SIZE (type
)), TYPE_ALIGN (type
));
871 /* If no predefined C types were found, register the mode itself. */
873 f (GET_MODE_NAME (i
), digs
, complex_p
,
874 vector_p
? GET_MODE_NUNITS (i
) : 0, float_rep
,
875 GET_MODE_PRECISION (i
), GET_MODE_BITSIZE (i
),
876 GET_MODE_ALIGNMENT (i
));
880 /* Return the size of the FP mode with precision PREC. */
883 fp_prec_to_size (int prec
)
887 for (mode
= GET_CLASS_NARROWEST_MODE (MODE_FLOAT
); mode
!= VOIDmode
;
888 mode
= GET_MODE_WIDER_MODE (mode
))
889 if (GET_MODE_PRECISION (mode
) == prec
)
890 return GET_MODE_BITSIZE (mode
);
895 /* Return the precision of the FP mode with size SIZE. */
898 fp_size_to_prec (int size
)
902 for (mode
= GET_CLASS_NARROWEST_MODE (MODE_FLOAT
); mode
!= VOIDmode
;
903 mode
= GET_MODE_WIDER_MODE (mode
))
904 if (GET_MODE_BITSIZE (mode
) == size
)
905 return GET_MODE_PRECISION (mode
);
910 static GTY(()) tree gnat_eh_personality_decl
;
912 /* Return the GNAT personality function decl. */
915 gnat_eh_personality (void)
917 if (!gnat_eh_personality_decl
)
918 gnat_eh_personality_decl
= build_personality_function ("gnat");
919 return gnat_eh_personality_decl
;
922 /* Initialize language-specific bits of tree_contains_struct. */
927 MARK_TS_COMMON (UNCONSTRAINED_ARRAY_TYPE
);
929 MARK_TS_TYPED (UNCONSTRAINED_ARRAY_REF
);
930 MARK_TS_TYPED (NULL_EXPR
);
931 MARK_TS_TYPED (PLUS_NOMOD_EXPR
);
932 MARK_TS_TYPED (MINUS_NOMOD_EXPR
);
933 MARK_TS_TYPED (ATTR_ADDR_EXPR
);
934 MARK_TS_TYPED (STMT_STMT
);
935 MARK_TS_TYPED (LOOP_STMT
);
936 MARK_TS_TYPED (EXIT_STMT
);
939 /* Definitions for our language-specific hooks. */
941 #undef LANG_HOOKS_NAME
942 #define LANG_HOOKS_NAME "GNU Ada"
943 #undef LANG_HOOKS_IDENTIFIER_SIZE
944 #define LANG_HOOKS_IDENTIFIER_SIZE sizeof (struct tree_identifier)
945 #undef LANG_HOOKS_INIT
946 #define LANG_HOOKS_INIT gnat_init
947 #undef LANG_HOOKS_OPTION_LANG_MASK
948 #define LANG_HOOKS_OPTION_LANG_MASK gnat_option_lang_mask
949 #undef LANG_HOOKS_INIT_OPTIONS_STRUCT
950 #define LANG_HOOKS_INIT_OPTIONS_STRUCT gnat_init_options_struct
951 #undef LANG_HOOKS_INIT_OPTIONS
952 #define LANG_HOOKS_INIT_OPTIONS gnat_init_options
953 #undef LANG_HOOKS_HANDLE_OPTION
954 #define LANG_HOOKS_HANDLE_OPTION gnat_handle_option
955 #undef LANG_HOOKS_POST_OPTIONS
956 #define LANG_HOOKS_POST_OPTIONS gnat_post_options
957 #undef LANG_HOOKS_PARSE_FILE
958 #define LANG_HOOKS_PARSE_FILE gnat_parse_file
959 #undef LANG_HOOKS_TYPE_HASH_EQ
960 #define LANG_HOOKS_TYPE_HASH_EQ gnat_type_hash_eq
961 #undef LANG_HOOKS_GETDECLS
962 #define LANG_HOOKS_GETDECLS lhd_return_null_tree_v
963 #undef LANG_HOOKS_PUSHDECL
964 #define LANG_HOOKS_PUSHDECL gnat_return_tree
965 #undef LANG_HOOKS_WRITE_GLOBALS
966 #define LANG_HOOKS_WRITE_GLOBALS gnat_write_global_declarations
967 #undef LANG_HOOKS_GET_ALIAS_SET
968 #define LANG_HOOKS_GET_ALIAS_SET gnat_get_alias_set
969 #undef LANG_HOOKS_PRINT_DECL
970 #define LANG_HOOKS_PRINT_DECL gnat_print_decl
971 #undef LANG_HOOKS_PRINT_TYPE
972 #define LANG_HOOKS_PRINT_TYPE gnat_print_type
973 #undef LANG_HOOKS_TYPE_MAX_SIZE
974 #define LANG_HOOKS_TYPE_MAX_SIZE gnat_type_max_size
975 #undef LANG_HOOKS_DECL_PRINTABLE_NAME
976 #define LANG_HOOKS_DECL_PRINTABLE_NAME gnat_printable_name
977 #undef LANG_HOOKS_DWARF_NAME
978 #define LANG_HOOKS_DWARF_NAME gnat_dwarf_name
979 #undef LANG_HOOKS_GIMPLIFY_EXPR
980 #define LANG_HOOKS_GIMPLIFY_EXPR gnat_gimplify_expr
981 #undef LANG_HOOKS_TYPE_FOR_MODE
982 #define LANG_HOOKS_TYPE_FOR_MODE gnat_type_for_mode
983 #undef LANG_HOOKS_TYPE_FOR_SIZE
984 #define LANG_HOOKS_TYPE_FOR_SIZE gnat_type_for_size
985 #undef LANG_HOOKS_TYPES_COMPATIBLE_P
986 #define LANG_HOOKS_TYPES_COMPATIBLE_P gnat_types_compatible_p
987 #undef LANG_HOOKS_GET_ARRAY_DESCR_INFO
988 #define LANG_HOOKS_GET_ARRAY_DESCR_INFO gnat_get_array_descr_info
989 #undef LANG_HOOKS_GET_SUBRANGE_BOUNDS
990 #define LANG_HOOKS_GET_SUBRANGE_BOUNDS gnat_get_subrange_bounds
991 #undef LANG_HOOKS_DESCRIPTIVE_TYPE
992 #define LANG_HOOKS_DESCRIPTIVE_TYPE gnat_descriptive_type
993 #undef LANG_HOOKS_ATTRIBUTE_TABLE
994 #define LANG_HOOKS_ATTRIBUTE_TABLE gnat_internal_attribute_table
995 #undef LANG_HOOKS_BUILTIN_FUNCTION
996 #define LANG_HOOKS_BUILTIN_FUNCTION gnat_builtin_function
997 #undef LANG_HOOKS_EH_PERSONALITY
998 #define LANG_HOOKS_EH_PERSONALITY gnat_eh_personality
999 #undef LANG_HOOKS_DEEP_UNSHARING
1000 #define LANG_HOOKS_DEEP_UNSHARING true
1001 #undef LANG_HOOKS_INIT_TS
1002 #define LANG_HOOKS_INIT_TS gnat_init_ts
1004 struct lang_hooks lang_hooks
= LANG_HOOKS_INITIALIZER
;
1006 #include "gt-ada-misc.h"