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. */
54 #include "adadecode.h"
68 /* This symbol needs to be defined for the front-end. */
69 void *callgraph_info_file
= NULL
;
71 /* Command-line argc and argv. These variables are global since they are
72 imported in back_end.adb. */
73 unsigned int save_argc
;
74 const char **save_argv
;
76 /* GNAT argc and argv. */
78 extern char **gnat_argv
;
84 /* Declare functions we use as part of startup. */
85 extern void __gnat_initialize (void *);
86 extern void __gnat_install_SEH_handler (void *);
87 extern void adainit (void);
88 extern void _ada_gnat1drv (void);
94 /* The parser for the language. For us, we process the GNAT tree. */
97 gnat_parse_file (void)
101 /* Call the target specific initializations. */
102 __gnat_initialize (NULL
);
104 /* ??? Call the SEH initialization routine. This is to workaround
105 a bootstrap path problem. The call below should be removed at some
106 point and the SEH pointer passed to __gnat_initialize() above. */
107 __gnat_install_SEH_handler((void *)seh
);
109 /* Call the front-end elaboration procedures. */
112 /* Call the front end. */
116 /* Return language mask for option processing. */
119 gnat_option_lang_mask (void)
124 /* Decode all the language specific options that cannot be decoded by GCC.
125 The option decoding phase of GCC calls this routine on the flags that
126 are marked as Ada-specific. Return true on success or false on failure. */
129 gnat_handle_option (size_t scode
, const char *arg ATTRIBUTE_UNUSED
, int value
,
130 int kind ATTRIBUTE_UNUSED
, location_t loc ATTRIBUTE_UNUSED
,
131 const struct cl_option_handlers
*handlers ATTRIBUTE_UNUSED
)
133 enum opt_code code
= (enum opt_code
) scode
;
138 handle_generated_option (&global_options
, &global_options_set
,
139 OPT_Wunused
, NULL
, value
,
140 gnat_option_lang_mask (), kind
, loc
,
141 handlers
, global_dc
);
142 warn_uninitialized
= value
;
143 warn_maybe_uninitialized
= value
;
147 warning (0, "%<-gnat%> misspelled as %<-gant%>");
149 /* ... fall through ... */
157 /* These are handled by the front-end. */
160 case OPT_fshort_enums
:
161 /* This is handled by the middle-end. */
168 Ada_handle_option_auto (&global_options
, &global_options_set
,
170 gnat_option_lang_mask (), kind
,
171 loc
, handlers
, global_dc
);
175 /* Initialize options structure OPTS. */
178 gnat_init_options_struct (struct gcc_options
*opts
)
180 /* Uninitialized really means uninitialized in Ada. */
181 opts
->x_flag_zero_initialized_in_bss
= 0;
183 /* We don't care about errno in Ada and it causes __builtin_sqrt to
184 call the libm function rather than do it inline. */
185 opts
->x_flag_errno_math
= 0;
186 opts
->frontend_set_flag_errno_math
= true;
189 /* Initialize for option processing. */
192 gnat_init_options (unsigned int decoded_options_count
,
193 struct cl_decoded_option
*decoded_options
)
195 /* Reconstruct an argv array for use of back_end.adb.
197 ??? back_end.adb should not rely on this; instead, it should work with
198 decoded options without such reparsing, to ensure consistency in how
199 options are decoded. */
202 save_argv
= XNEWVEC (const char *, 2 * decoded_options_count
+ 1);
204 for (i
= 0; i
< decoded_options_count
; i
++)
206 size_t num_elements
= decoded_options
[i
].canonical_option_num_elements
;
208 if (decoded_options
[i
].errors
209 || decoded_options
[i
].opt_index
== OPT_SPECIAL_unknown
210 || num_elements
== 0)
213 /* Deal with -I- specially since it must be a single switch. */
214 if (decoded_options
[i
].opt_index
== OPT_I
216 && decoded_options
[i
].canonical_option
[1][0] == '-'
217 && decoded_options
[i
].canonical_option
[1][1] == '\0')
218 save_argv
[save_argc
++] = "-I-";
221 gcc_assert (num_elements
>= 1 && num_elements
<= 2);
222 save_argv
[save_argc
++] = decoded_options
[i
].canonical_option
[0];
223 if (num_elements
>= 2)
224 save_argv
[save_argc
++] = decoded_options
[i
].canonical_option
[1];
227 save_argv
[save_argc
] = NULL
;
229 gnat_argv
= (char **) xmalloc (sizeof (save_argv
[0]));
230 gnat_argv
[0] = xstrdup (save_argv
[0]); /* name of the command */
234 /* Ada code requires variables for these settings rather than elements
235 of the global_options structure. */
238 #undef flag_compare_debug
239 #undef flag_short_enums
240 #undef flag_stack_check
243 int flag_compare_debug
;
244 int flag_short_enums
;
245 enum stack_check_type flag_stack_check
= NO_STACK_CHECK
;
247 /* Settings adjustments after switches processing by the back-end.
248 Note that the front-end switches processing (Scan_Compiler_Arguments)
249 has not been done yet at this point! */
252 gnat_post_options (const char **pfilename ATTRIBUTE_UNUSED
)
254 /* Excess precision other than "fast" requires front-end support. */
255 if (flag_excess_precision_cmdline
== EXCESS_PRECISION_STANDARD
256 && TARGET_FLT_EVAL_METHOD_NON_DEFAULT
)
257 sorry ("-fexcess-precision=standard for Ada");
258 flag_excess_precision_cmdline
= EXCESS_PRECISION_FAST
;
260 /* ??? The warning machinery is outsmarted by Ada. */
261 warn_unused_parameter
= 0;
263 /* No psABI change warnings for Ada. */
266 /* No caret by default for Ada. */
267 if (!global_options_set
.x_flag_diagnostics_show_caret
)
268 global_dc
->show_caret
= false;
270 optimize
= global_options
.x_optimize
;
271 optimize_size
= global_options
.x_optimize_size
;
272 flag_compare_debug
= global_options
.x_flag_compare_debug
;
273 flag_stack_check
= global_options
.x_flag_stack_check
;
274 flag_short_enums
= global_options
.x_flag_short_enums
;
276 /* Unfortunately the post_options hook is called before the value of
277 flag_short_enums is autodetected, if need be. Mimic the process
278 for our private flag_short_enums. */
279 if (flag_short_enums
== 2)
280 flag_short_enums
= targetm
.default_short_enums ();
285 /* Here is the function to handle the compiler error processing in GCC. */
288 internal_error_function (diagnostic_context
*context
,
289 const char *msgid
, va_list *ap
)
292 char *buffer
, *p
, *loc
;
293 String_Template temp
, temp_loc
;
294 String_Pointer sp
, sp_loc
;
295 expanded_location xloc
;
297 /* Warn if plugins present. */
300 /* Reset the pretty-printer. */
301 pp_clear_output_area (context
->printer
);
303 /* Format the message into the pretty-printer. */
304 tinfo
.format_spec
= msgid
;
306 tinfo
.err_no
= errno
;
307 pp_format_verbatim (context
->printer
, &tinfo
);
309 /* Extract a (writable) pointer to the formatted text. */
310 buffer
= xstrdup (pp_formatted_text (context
->printer
));
312 /* Go up to the first newline. */
313 for (p
= buffer
; *p
; p
++)
321 temp
.High_Bound
= p
- buffer
;
325 xloc
= expand_location (input_location
);
326 if (context
->show_column
&& xloc
.column
!= 0)
327 asprintf (&loc
, "%s:%d:%d", xloc
.file
, xloc
.line
, xloc
.column
);
329 asprintf (&loc
, "%s:%d", xloc
.file
, xloc
.line
);
330 temp_loc
.Low_Bound
= 1;
331 temp_loc
.High_Bound
= strlen (loc
);
332 sp_loc
.Bounds
= &temp_loc
;
335 Current_Error_Node
= error_gnat_node
;
336 Compiler_Abort (sp
, sp_loc
, true);
339 /* Perform all the initialization steps that are language-specific. */
344 /* Do little here, most of the standard declarations are set up after the
345 front-end has been run. Use the same `char' as C, this doesn't really
346 matter since we'll use the explicit `unsigned char' for Character. */
347 build_common_tree_nodes (flag_signed_char
, false);
349 /* In Ada, we use an unsigned 8-bit type for the default boolean type. */
350 boolean_type_node
= make_unsigned_type (8);
351 TREE_SET_CODE (boolean_type_node
, BOOLEAN_TYPE
);
352 SET_TYPE_RM_MAX_VALUE (boolean_type_node
,
353 build_int_cst (boolean_type_node
, 1));
354 SET_TYPE_RM_SIZE (boolean_type_node
, bitsize_int (1));
355 boolean_true_node
= TYPE_MAX_VALUE (boolean_type_node
);
356 boolean_false_node
= TYPE_MIN_VALUE (boolean_type_node
);
358 sbitsize_one_node
= sbitsize_int (1);
359 sbitsize_unit_node
= sbitsize_int (BITS_PER_UNIT
);
361 ptr_void_type_node
= build_pointer_type (void_type_node
);
363 /* Show that REFERENCE_TYPEs are internal and should be Pmode. */
364 internal_reference_types ();
366 /* Register our internal error function. */
367 global_dc
->internal_error
= &internal_error_function
;
372 /* Initialize the GCC support for exception handling. */
375 gnat_init_gcc_eh (void)
377 /* We shouldn't do anything if the No_Exceptions_Handler pragma is set,
378 though. This could for instance lead to the emission of tables with
379 references to symbols (such as the Ada eh personality routine) within
380 libraries we won't link against. */
381 if (No_Exception_Handlers_Set ())
384 /* Tell GCC we are handling cleanup actions through exception propagation.
385 This opens possibilities that we don't take advantage of yet, but is
386 nonetheless necessary to ensure that fixup code gets assigned to the
387 right exception regions. */
388 using_eh_for_cleanups ();
390 /* Turn on -fexceptions, -fnon-call-exceptions and -fdelete-dead-exceptions.
391 The first one triggers the generation of the necessary exception tables.
392 The second one is useful for two reasons: 1/ we map some asynchronous
393 signals like SEGV to exceptions, so we need to ensure that the insns
394 which can lead to such signals are correctly attached to the exception
395 region they pertain to, 2/ some calls to pure subprograms are handled as
396 libcall blocks and then marked as "cannot trap" if the flag is not set
397 (see emit_libcall_block). We should not let this be since it is possible
398 for such calls to actually raise in Ada.
399 The third one is an optimization that makes it possible to delete dead
400 instructions that may throw exceptions, most notably loads and stores,
401 as permitted in Ada. */
403 flag_non_call_exceptions
= 1;
404 flag_delete_dead_exceptions
= 1;
409 /* Initialize the GCC support for floating-point operations. */
412 gnat_init_gcc_fp (void)
414 /* Disable FP optimizations that ignore the signedness of zero if
415 S'Signed_Zeros is true, but don't override the user if not. */
416 if (Signed_Zeros_On_Target
)
417 flag_signed_zeros
= 1;
418 else if (!global_options_set
.x_flag_signed_zeros
)
419 flag_signed_zeros
= 0;
421 /* Assume that FP operations can trap if S'Machine_Overflow is true,
422 but don't override the user if not. */
423 if (Machine_Overflows_On_Target
)
424 flag_trapping_math
= 1;
425 else if (!global_options_set
.x_flag_trapping_math
)
426 flag_trapping_math
= 0;
429 /* Print language-specific items in declaration NODE. */
432 gnat_print_decl (FILE *file
, tree node
, int indent
)
434 switch (TREE_CODE (node
))
437 print_node (file
, "corresponding var",
438 DECL_CONST_CORRESPONDING_VAR (node
), indent
+ 4);
442 print_node (file
, "original field", DECL_ORIGINAL_FIELD (node
),
447 if (DECL_LOOP_PARM_P (node
))
448 print_node (file
, "induction var", DECL_INDUCTION_VAR (node
),
451 print_node (file
, "renamed object", DECL_RENAMED_OBJECT (node
),
460 /* Print language-specific items in type NODE. */
463 gnat_print_type (FILE *file
, tree node
, int indent
)
465 switch (TREE_CODE (node
))
468 print_node (file
, "ci/co list", TYPE_CI_CO_LIST (node
), indent
+ 4);
472 if (TYPE_MODULAR_P (node
))
473 print_node_brief (file
, "modulus", TYPE_MODULUS (node
), indent
+ 4);
474 else if (TYPE_HAS_ACTUAL_BOUNDS_P (node
))
475 print_node (file
, "actual bounds", TYPE_ACTUAL_BOUNDS (node
),
478 print_node (file
, "index type", TYPE_INDEX_TYPE (node
), indent
+ 4);
480 /* ... fall through ... */
484 print_node_brief (file
, "RM size", TYPE_RM_SIZE (node
), indent
+ 4);
486 /* ... fall through ... */
489 print_node_brief (file
, "RM min", TYPE_RM_MIN_VALUE (node
), indent
+ 4);
490 print_node_brief (file
, "RM max", TYPE_RM_MAX_VALUE (node
), indent
+ 4);
494 print_node (file
,"actual bounds", TYPE_ACTUAL_BOUNDS (node
), indent
+ 4);
498 print_node (file
,"representative array",
499 TYPE_REPRESENTATIVE_ARRAY (node
), indent
+ 4);
503 if (TYPE_FAT_POINTER_P (node
) || TYPE_CONTAINS_TEMPLATE_P (node
))
504 print_node (file
, "unconstrained array",
505 TYPE_UNCONSTRAINED_ARRAY (node
), indent
+ 4);
507 print_node (file
, "Ada size", TYPE_ADA_SIZE (node
), indent
+ 4);
511 case QUAL_UNION_TYPE
:
512 print_node (file
, "Ada size", TYPE_ADA_SIZE (node
), indent
+ 4);
520 /* Return the name to be printed for DECL. */
523 gnat_printable_name (tree decl
, int verbosity
)
525 const char *coded_name
= IDENTIFIER_POINTER (DECL_NAME (decl
));
526 char *ada_name
= (char *) ggc_alloc_atomic (strlen (coded_name
) * 2 + 60);
528 __gnat_decode (coded_name
, ada_name
, 0);
530 if (verbosity
== 2 && !DECL_IS_BUILTIN (decl
))
532 Set_Identifier_Casing (ada_name
, DECL_SOURCE_FILE (decl
));
533 return ggc_strdup (Name_Buffer
);
539 /* Return the name to be used in DWARF debug info for DECL. */
542 gnat_dwarf_name (tree decl
, int verbosity ATTRIBUTE_UNUSED
)
544 gcc_assert (DECL_P (decl
));
545 return (const char *) IDENTIFIER_POINTER (DECL_NAME (decl
));
548 /* Return the descriptive type associated with TYPE, if any. */
551 gnat_descriptive_type (const_tree type
)
553 if (TYPE_STUB_DECL (type
))
554 return DECL_PARALLEL_TYPE (TYPE_STUB_DECL (type
));
559 /* Return true if types T1 and T2 are identical for type hashing purposes.
560 Called only after doing all language independent checks. At present,
561 this function is only called when both types are FUNCTION_TYPE. */
564 gnat_type_hash_eq (const_tree t1
, const_tree t2
)
566 gcc_assert (TREE_CODE (t1
) == FUNCTION_TYPE
);
567 return fntype_same_flags_p (t1
, TYPE_CI_CO_LIST (t2
),
568 TYPE_RETURN_UNCONSTRAINED_P (t2
),
569 TYPE_RETURN_BY_DIRECT_REF_P (t2
),
570 TREE_ADDRESSABLE (t2
));
573 /* Do nothing (return the tree node passed). */
576 gnat_return_tree (tree t
)
581 /* Get the alias set corresponding to a type or expression. */
583 static alias_set_type
584 gnat_get_alias_set (tree type
)
586 /* If this is a padding type, use the type of the first field. */
587 if (TYPE_IS_PADDING_P (type
))
588 return get_alias_set (TREE_TYPE (TYPE_FIELDS (type
)));
590 /* If the type is an unconstrained array, use the type of the
591 self-referential array we make. */
592 else if (TREE_CODE (type
) == UNCONSTRAINED_ARRAY_TYPE
)
594 get_alias_set (TREE_TYPE (TREE_TYPE (TYPE_FIELDS (TREE_TYPE (type
)))));
596 /* If the type can alias any other types, return the alias set 0. */
597 else if (TYPE_P (type
)
598 && TYPE_UNIVERSAL_ALIASING_P (TYPE_MAIN_VARIANT (type
)))
604 /* GNU_TYPE is a type. Return its maximum size in bytes, if known,
605 as a constant when possible. */
608 gnat_type_max_size (const_tree gnu_type
)
610 /* First see what we can get from TYPE_SIZE_UNIT, which might not
611 be constant even for simple expressions if it has already been
612 elaborated and possibly replaced by a VAR_DECL. */
613 tree max_unitsize
= max_size (TYPE_SIZE_UNIT (gnu_type
), true);
615 /* If we don't have a constant, see what we can get from TYPE_ADA_SIZE,
616 which should stay untouched. */
617 if (!tree_fits_uhwi_p (max_unitsize
)
618 && RECORD_OR_UNION_TYPE_P (gnu_type
)
619 && !TYPE_FAT_POINTER_P (gnu_type
)
620 && TYPE_ADA_SIZE (gnu_type
))
622 tree max_adasize
= max_size (TYPE_ADA_SIZE (gnu_type
), true);
624 /* If we have succeeded in finding a constant, round it up to the
625 type's alignment and return the result in units. */
626 if (tree_fits_uhwi_p (max_adasize
))
628 = size_binop (CEIL_DIV_EXPR
,
629 round_up (max_adasize
, TYPE_ALIGN (gnu_type
)),
636 /* GNU_TYPE is a subtype of an integral type. Set LOWVAL to the low bound
637 and HIGHVAL to the high bound, respectively. */
640 gnat_get_subrange_bounds (const_tree gnu_type
, tree
*lowval
, tree
*highval
)
642 *lowval
= TYPE_MIN_VALUE (gnu_type
);
643 *highval
= TYPE_MAX_VALUE (gnu_type
);
646 /* GNU_TYPE is the type of a subprogram parameter. Determine if it should be
647 passed by reference by default. */
650 default_pass_by_ref (tree gnu_type
)
652 /* We pass aggregates by reference if they are sufficiently large for
653 their alignment. The ratio is somewhat arbitrary. We also pass by
654 reference if the target machine would either pass or return by
655 reference. Strictly speaking, we need only check the return if this
656 is an In Out parameter, but it's probably best to err on the side of
657 passing more things by reference. */
659 if (pass_by_reference (NULL
, TYPE_MODE (gnu_type
), gnu_type
, true))
662 if (targetm
.calls
.return_in_memory (gnu_type
, NULL_TREE
))
665 if (AGGREGATE_TYPE_P (gnu_type
)
666 && (!valid_constant_size_p (TYPE_SIZE_UNIT (gnu_type
))
667 || 0 < compare_tree_int (TYPE_SIZE_UNIT (gnu_type
),
668 TYPE_ALIGN (gnu_type
))))
674 /* GNU_TYPE is the type of a subprogram parameter. Determine if it must be
675 passed by reference. */
678 must_pass_by_ref (tree gnu_type
)
680 /* We pass only unconstrained objects, those required by the language
681 to be passed by reference, and objects of variable size. The latter
682 is more efficient, avoids problems with variable size temporaries,
683 and does not produce compatibility problems with C, since C does
684 not have such objects. */
685 return (TREE_CODE (gnu_type
) == UNCONSTRAINED_ARRAY_TYPE
686 || TYPE_IS_BY_REFERENCE_P (gnu_type
)
687 || (TYPE_SIZE_UNIT (gnu_type
)
688 && TREE_CODE (TYPE_SIZE_UNIT (gnu_type
)) != INTEGER_CST
));
691 /* This function is called by the front-end to enumerate all the supported
692 modes for the machine, as well as some predefined C types. F is a function
693 which is called back with the parameters as listed below, first a string,
694 then seven ints. The name is any arbitrary null-terminated string and has
695 no particular significance, except for the case of predefined C types, where
696 it should be the name of the C type. For integer types, only signed types
697 should be listed, unsigned versions are assumed. The order of types should
698 be in order of preference, with the smallest/cheapest types first.
700 In particular, C predefined types should be listed before other types,
701 binary floating point types before decimal ones, and narrower/cheaper
702 type versions before more expensive ones. In type selection the first
703 matching variant will be used.
705 NAME pointer to first char of type name
706 DIGS number of decimal digits for floating-point modes, else 0
707 COMPLEX_P nonzero is this represents a complex mode
708 COUNT count of number of items, nonzero for vector mode
709 FLOAT_REP Float_Rep_Kind for FP, otherwise undefined
710 PRECISION number of bits used to store data
711 SIZE number of bits occupied by the mode
712 ALIGN number of bits to which mode is aligned. */
715 enumerate_modes (void (*f
) (const char *, int, int, int, int, int, int, int))
718 = { float_type_node
, double_type_node
, long_double_type_node
};
719 const char *const c_names
[]
720 = { "float", "double", "long double" };
723 /* We are going to compute it below. */
724 fp_arith_may_widen
= false;
726 for (iloop
= 0; iloop
< NUM_MACHINE_MODES
; iloop
++)
728 machine_mode i
= (machine_mode
) iloop
;
729 machine_mode inner_mode
= i
;
730 bool float_p
= false;
731 bool complex_p
= false;
732 bool vector_p
= false;
735 unsigned int nameloop
;
736 Float_Rep_Kind float_rep
= IEEE_Binary
; /* Until proven otherwise */
738 switch (GET_MODE_CLASS (i
))
745 case MODE_COMPLEX_INT
:
747 inner_mode
= GET_MODE_INNER (i
);
749 case MODE_COMPLEX_FLOAT
:
752 inner_mode
= GET_MODE_INNER (i
);
754 case MODE_VECTOR_INT
:
756 inner_mode
= GET_MODE_INNER (i
);
758 case MODE_VECTOR_FLOAT
:
761 inner_mode
= GET_MODE_INNER (i
);
769 const struct real_format
*fmt
= REAL_MODE_FORMAT (inner_mode
);
771 /* ??? Cope with the ghost XFmode of the ARM port. */
775 /* Be conservative and consider that floating-point arithmetics may
776 use wider intermediate results as soon as there is an extended
777 Motorola or Intel mode supported by the machine. */
778 if (fmt
== &ieee_extended_motorola_format
779 || fmt
== &ieee_extended_intel_96_format
780 || fmt
== &ieee_extended_intel_96_round_53_format
781 || fmt
== &ieee_extended_intel_128_format
)
782 fp_arith_may_widen
= true;
785 digs
= (fmt
->p
- 1) * 1233 / 4096; /* scale by log (2) */
787 else if (fmt
->b
== 10)
794 /* First register any C types for this mode that the front end
795 may need to know about, unless the mode should be skipped. */
796 if (!skip_p
&& !vector_p
)
797 for (nameloop
= 0; nameloop
< ARRAY_SIZE (c_types
); nameloop
++)
799 tree type
= c_types
[nameloop
];
800 const char *name
= c_names
[nameloop
];
802 if (TYPE_MODE (type
) == i
)
804 f (name
, digs
, complex_p
, 0, float_rep
, TYPE_PRECISION (type
),
805 TREE_INT_CST_LOW (TYPE_SIZE (type
)), TYPE_ALIGN (type
));
810 /* If no predefined C types were found, register the mode itself. */
812 f (GET_MODE_NAME (i
), digs
, complex_p
,
813 vector_p
? GET_MODE_NUNITS (i
) : 0, float_rep
,
814 GET_MODE_PRECISION (i
), GET_MODE_BITSIZE (i
),
815 GET_MODE_ALIGNMENT (i
));
819 /* Return the size of the FP mode with precision PREC. */
822 fp_prec_to_size (int prec
)
826 for (mode
= GET_CLASS_NARROWEST_MODE (MODE_FLOAT
); mode
!= VOIDmode
;
827 mode
= GET_MODE_WIDER_MODE (mode
))
828 if (GET_MODE_PRECISION (mode
) == prec
)
829 return GET_MODE_BITSIZE (mode
);
834 /* Return the precision of the FP mode with size SIZE. */
837 fp_size_to_prec (int size
)
841 for (mode
= GET_CLASS_NARROWEST_MODE (MODE_FLOAT
); mode
!= VOIDmode
;
842 mode
= GET_MODE_WIDER_MODE (mode
))
843 if (GET_MODE_BITSIZE (mode
) == size
)
844 return GET_MODE_PRECISION (mode
);
849 static GTY(()) tree gnat_eh_personality_decl
;
851 /* Return the GNAT personality function decl. */
854 gnat_eh_personality (void)
856 if (!gnat_eh_personality_decl
)
857 gnat_eh_personality_decl
= build_personality_function ("gnat");
858 return gnat_eh_personality_decl
;
861 /* Initialize language-specific bits of tree_contains_struct. */
866 MARK_TS_COMMON (UNCONSTRAINED_ARRAY_TYPE
);
868 MARK_TS_TYPED (UNCONSTRAINED_ARRAY_REF
);
869 MARK_TS_TYPED (NULL_EXPR
);
870 MARK_TS_TYPED (PLUS_NOMOD_EXPR
);
871 MARK_TS_TYPED (MINUS_NOMOD_EXPR
);
872 MARK_TS_TYPED (ATTR_ADDR_EXPR
);
873 MARK_TS_TYPED (STMT_STMT
);
874 MARK_TS_TYPED (LOOP_STMT
);
875 MARK_TS_TYPED (EXIT_STMT
);
878 /* Definitions for our language-specific hooks. */
880 #undef LANG_HOOKS_NAME
881 #define LANG_HOOKS_NAME "GNU Ada"
882 #undef LANG_HOOKS_IDENTIFIER_SIZE
883 #define LANG_HOOKS_IDENTIFIER_SIZE sizeof (struct tree_identifier)
884 #undef LANG_HOOKS_INIT
885 #define LANG_HOOKS_INIT gnat_init
886 #undef LANG_HOOKS_OPTION_LANG_MASK
887 #define LANG_HOOKS_OPTION_LANG_MASK gnat_option_lang_mask
888 #undef LANG_HOOKS_INIT_OPTIONS_STRUCT
889 #define LANG_HOOKS_INIT_OPTIONS_STRUCT gnat_init_options_struct
890 #undef LANG_HOOKS_INIT_OPTIONS
891 #define LANG_HOOKS_INIT_OPTIONS gnat_init_options
892 #undef LANG_HOOKS_HANDLE_OPTION
893 #define LANG_HOOKS_HANDLE_OPTION gnat_handle_option
894 #undef LANG_HOOKS_POST_OPTIONS
895 #define LANG_HOOKS_POST_OPTIONS gnat_post_options
896 #undef LANG_HOOKS_PARSE_FILE
897 #define LANG_HOOKS_PARSE_FILE gnat_parse_file
898 #undef LANG_HOOKS_TYPE_HASH_EQ
899 #define LANG_HOOKS_TYPE_HASH_EQ gnat_type_hash_eq
900 #undef LANG_HOOKS_GETDECLS
901 #define LANG_HOOKS_GETDECLS lhd_return_null_tree_v
902 #undef LANG_HOOKS_PUSHDECL
903 #define LANG_HOOKS_PUSHDECL gnat_return_tree
904 #undef LANG_HOOKS_WRITE_GLOBALS
905 #define LANG_HOOKS_WRITE_GLOBALS gnat_write_global_declarations
906 #undef LANG_HOOKS_GET_ALIAS_SET
907 #define LANG_HOOKS_GET_ALIAS_SET gnat_get_alias_set
908 #undef LANG_HOOKS_PRINT_DECL
909 #define LANG_HOOKS_PRINT_DECL gnat_print_decl
910 #undef LANG_HOOKS_PRINT_TYPE
911 #define LANG_HOOKS_PRINT_TYPE gnat_print_type
912 #undef LANG_HOOKS_TYPE_MAX_SIZE
913 #define LANG_HOOKS_TYPE_MAX_SIZE gnat_type_max_size
914 #undef LANG_HOOKS_DECL_PRINTABLE_NAME
915 #define LANG_HOOKS_DECL_PRINTABLE_NAME gnat_printable_name
916 #undef LANG_HOOKS_DWARF_NAME
917 #define LANG_HOOKS_DWARF_NAME gnat_dwarf_name
918 #undef LANG_HOOKS_GIMPLIFY_EXPR
919 #define LANG_HOOKS_GIMPLIFY_EXPR gnat_gimplify_expr
920 #undef LANG_HOOKS_TYPE_FOR_MODE
921 #define LANG_HOOKS_TYPE_FOR_MODE gnat_type_for_mode
922 #undef LANG_HOOKS_TYPE_FOR_SIZE
923 #define LANG_HOOKS_TYPE_FOR_SIZE gnat_type_for_size
924 #undef LANG_HOOKS_TYPES_COMPATIBLE_P
925 #define LANG_HOOKS_TYPES_COMPATIBLE_P gnat_types_compatible_p
926 #undef LANG_HOOKS_GET_SUBRANGE_BOUNDS
927 #define LANG_HOOKS_GET_SUBRANGE_BOUNDS gnat_get_subrange_bounds
928 #undef LANG_HOOKS_DESCRIPTIVE_TYPE
929 #define LANG_HOOKS_DESCRIPTIVE_TYPE gnat_descriptive_type
930 #undef LANG_HOOKS_ATTRIBUTE_TABLE
931 #define LANG_HOOKS_ATTRIBUTE_TABLE gnat_internal_attribute_table
932 #undef LANG_HOOKS_BUILTIN_FUNCTION
933 #define LANG_HOOKS_BUILTIN_FUNCTION gnat_builtin_function
934 #undef LANG_HOOKS_EH_PERSONALITY
935 #define LANG_HOOKS_EH_PERSONALITY gnat_eh_personality
936 #undef LANG_HOOKS_DEEP_UNSHARING
937 #define LANG_HOOKS_DEEP_UNSHARING true
938 #undef LANG_HOOKS_INIT_TS
939 #define LANG_HOOKS_INIT_TS gnat_init_ts
941 struct lang_hooks lang_hooks
= LANG_HOOKS_INITIALIZER
;
943 #include "gt-ada-misc.h"