1 /****************************************************************************
3 * GNAT COMPILER COMPONENTS *
7 * C Implementation File *
9 * Copyright (C) 1992-2010, 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 ****************************************************************************/
26 /* This file contains parts of the compiler that are required for interfacing
27 with GCC but otherwise do nothing and parts of Gigi that need to know
32 #include "coretypes.h"
35 #include "diagnostic.h"
46 #include "langhooks.h"
47 #include "langhooks-def.h"
50 #include "tree-inline.h"
53 #include "adadecode.h"
67 static bool gnat_init (void);
68 static unsigned int gnat_init_options (unsigned int, const char **);
69 static int gnat_handle_option (size_t, const char *, int, int);
70 static bool gnat_post_options (const char **);
71 static alias_set_type gnat_get_alias_set (tree);
72 static void gnat_print_decl (FILE *, tree, int);
73 static void gnat_print_type (FILE *, tree, int);
74 static const char *gnat_printable_name (tree, int);
75 static const char *gnat_dwarf_name (tree, int);
76 static tree gnat_return_tree (tree);
77 static void gnat_parse_file (int);
78 static void internal_error_function (const char *, va_list *);
79 static tree gnat_type_max_size (const_tree);
80 static void gnat_get_subrange_bounds (const_tree, tree *, tree *);
81 static tree gnat_eh_personality (void);
83 /* Definitions for our language-specific hooks. */
85 #undef LANG_HOOKS_NAME
86 #define LANG_HOOKS_NAME "GNU Ada"
87 #undef LANG_HOOKS_IDENTIFIER_SIZE
88 #define LANG_HOOKS_IDENTIFIER_SIZE sizeof (struct tree_identifier)
89 #undef LANG_HOOKS_INIT
90 #define LANG_HOOKS_INIT gnat_init
91 #undef LANG_HOOKS_INIT_OPTIONS
92 #define LANG_HOOKS_INIT_OPTIONS gnat_init_options
93 #undef LANG_HOOKS_HANDLE_OPTION
94 #define LANG_HOOKS_HANDLE_OPTION gnat_handle_option
95 #undef LANG_HOOKS_POST_OPTIONS
96 #define LANG_HOOKS_POST_OPTIONS gnat_post_options
97 #undef LANG_HOOKS_PARSE_FILE
98 #define LANG_HOOKS_PARSE_FILE gnat_parse_file
99 #undef LANG_HOOKS_HASH_TYPES
100 #define LANG_HOOKS_HASH_TYPES false
101 #undef LANG_HOOKS_GETDECLS
102 #define LANG_HOOKS_GETDECLS lhd_return_null_tree_v
103 #undef LANG_HOOKS_PUSHDECL
104 #define LANG_HOOKS_PUSHDECL gnat_return_tree
105 #undef LANG_HOOKS_WRITE_GLOBALS
106 #define LANG_HOOKS_WRITE_GLOBALS gnat_write_global_declarations
107 #undef LANG_HOOKS_GET_ALIAS_SET
108 #define LANG_HOOKS_GET_ALIAS_SET gnat_get_alias_set
109 #undef LANG_HOOKS_PRINT_DECL
110 #define LANG_HOOKS_PRINT_DECL gnat_print_decl
111 #undef LANG_HOOKS_PRINT_TYPE
112 #define LANG_HOOKS_PRINT_TYPE gnat_print_type
113 #undef LANG_HOOKS_TYPE_MAX_SIZE
114 #define LANG_HOOKS_TYPE_MAX_SIZE gnat_type_max_size
115 #undef LANG_HOOKS_DECL_PRINTABLE_NAME
116 #define LANG_HOOKS_DECL_PRINTABLE_NAME gnat_printable_name
117 #undef LANG_HOOKS_DWARF_NAME
118 #define LANG_HOOKS_DWARF_NAME gnat_dwarf_name
119 #undef LANG_HOOKS_GIMPLIFY_EXPR
120 #define LANG_HOOKS_GIMPLIFY_EXPR gnat_gimplify_expr
121 #undef LANG_HOOKS_TYPE_FOR_MODE
122 #define LANG_HOOKS_TYPE_FOR_MODE gnat_type_for_mode
123 #undef LANG_HOOKS_TYPE_FOR_SIZE
124 #define LANG_HOOKS_TYPE_FOR_SIZE gnat_type_for_size
125 #undef LANG_HOOKS_TYPES_COMPATIBLE_P
126 #define LANG_HOOKS_TYPES_COMPATIBLE_P gnat_types_compatible_p
127 #undef LANG_HOOKS_GET_SUBRANGE_BOUNDS
128 #define LANG_HOOKS_GET_SUBRANGE_BOUNDS gnat_get_subrange_bounds
129 #undef LANG_HOOKS_ATTRIBUTE_TABLE
130 #define LANG_HOOKS_ATTRIBUTE_TABLE gnat_internal_attribute_table
131 #undef LANG_HOOKS_BUILTIN_FUNCTION
132 #define LANG_HOOKS_BUILTIN_FUNCTION gnat_builtin_function
133 #undef LANG_HOOKS_EH_PERSONALITY
134 #define LANG_HOOKS_EH_PERSONALITY gnat_eh_personality
136 struct lang_hooks lang_hooks = LANG_HOOKS_INITIALIZER;
138 /* How much we want of our DWARF extensions. Some of our dwarf+ extensions
139 are incompatible with regular GDB versions, so we must make sure to only
140 produce them on explicit request. This is eventually reflected into the
141 use_gnu_debug_info_extensions common flag for later processing. */
142 static int gnat_dwarf_extensions = 0;
144 /* Command-line argc and argv. These variables are global
145 since they are imported in back_end.adb. */
146 unsigned int save_argc;
147 const char **save_argv;
149 /* GNAT argc and argv. */
150 extern int gnat_argc;
151 extern char **gnat_argv;
153 /* Declare functions we use as part of startup. */
154 extern void __gnat_initialize (void *);
155 extern void __gnat_install_SEH_handler (void *);
156 extern void adainit (void);
157 extern void _ada_gnat1drv (void);
159 /* The parser for the language. For us, we process the GNAT tree. */
162 gnat_parse_file (int set_yydebug ATTRIBUTE_UNUSED)
166 /* Call the target specific initializations. */
167 __gnat_initialize (NULL);
169 /* ??? Call the SEH initialization routine. This is to workaround
170 a bootstrap path problem. The call below should be removed at some
171 point and the SEH pointer passed to __gnat_initialize() above. */
172 __gnat_install_SEH_handler((void *)seh);
174 /* Call the front-end elaboration procedures. */
177 /* Call the front end. */
181 /* Decode all the language specific options that cannot be decoded by GCC.
182 The option decoding phase of GCC calls this routine on the flags that
183 it cannot decode. Return the number of consecutive arguments from ARGV
184 that have been successfully decoded or 0 on failure. */
187 gnat_handle_option (size_t scode, const char *arg, int value,
188 int kind ATTRIBUTE_UNUSED)
190 const struct cl_option *option = &cl_options[scode];
191 enum opt_code code = (enum opt_code) scode;
194 if (arg == NULL && (option->flags & (CL_JOINED | CL_SEPARATE)))
196 error ("missing argument to \"-%s\"", option->opt_text);
203 q = XNEWVEC (char, sizeof("-I") + strlen (arg));
206 gnat_argv[gnat_argc] = q;
212 warn_uninitialized = value;
215 /* These are used in the GCC Makefile. */
216 case OPT_Wmissing_prototypes:
217 case OPT_Wstrict_prototypes:
218 case OPT_Wwrite_strings:
220 case OPT_Wvariadic_macros:
221 case OPT_Wold_style_definition:
222 case OPT_Wmissing_format_attribute:
223 case OPT_Woverlength_strings:
226 /* This is handled by the front-end. */
231 gnat_argv[gnat_argc] = xstrdup ("-nostdlib");
235 case OPT_feliminate_unused_debug_types:
236 /* We arrange for post_option to be able to only set the corresponding
237 flag to 1 when explicitly requested by the user. We expect the
238 default flag value to be either 0 or positive, and expose a positive
239 -f as a negative value to post_option. */
240 flag_eliminate_unused_debug_types = -value;
244 gnat_argv[gnat_argc] = xstrdup ("-fRTS");
249 warning (0, "%<-gnat%> misspelled as %<-gant%>");
251 /* ... fall through ... */
254 /* Recopy the switches without the 'gnat' prefix. */
255 gnat_argv[gnat_argc] = XNEWVEC (char, strlen (arg) + 2);
256 gnat_argv[gnat_argc][0] = '-';
257 strcpy (gnat_argv[gnat_argc] + 1, arg);
262 gnat_argv[gnat_argc] = xstrdup ("-O");
264 gnat_argv[gnat_argc] = xstrdup (arg);
269 gnat_dwarf_extensions = 1;
279 /* Initialize for option processing. */
282 gnat_init_options (unsigned int argc, const char **argv)
284 /* Initialize gnat_argv with save_argv size. */
285 gnat_argv = (char **) xmalloc ((argc + 1) * sizeof (argv[0]));
286 gnat_argv[0] = xstrdup (argv[0]); /* name of the command */
292 /* Uninitialized really means uninitialized in Ada. */
293 flag_zero_initialized_in_bss = 0;
298 /* Post-switch processing. */
301 gnat_post_options (const char **pfilename ATTRIBUTE_UNUSED)
303 /* Excess precision other than "fast" requires front-end
305 if (flag_excess_precision_cmdline == EXCESS_PRECISION_STANDARD
306 && TARGET_FLT_EVAL_METHOD_NON_DEFAULT)
307 sorry ("-fexcess-precision=standard for Ada");
308 flag_excess_precision_cmdline = EXCESS_PRECISION_FAST;
310 /* ??? The warning machinery is outsmarted by Ada. */
311 warn_unused_parameter = 0;
313 /* No psABI change warnings for Ada. */
316 /* Force eliminate_unused_debug_types to 0 unless an explicit positive
317 -f has been passed. This forces the default to 0 for Ada, which might
318 differ from the common default. */
319 if (flag_eliminate_unused_debug_types < 0)
320 flag_eliminate_unused_debug_types = 1;
322 flag_eliminate_unused_debug_types = 0;
324 /* Reflect the explicit request of DWARF extensions into the common
325 flag for use by later passes. */
326 if (write_symbols == DWARF2_DEBUG)
327 use_gnu_debug_info_extensions = gnat_dwarf_extensions > 0;
332 /* Here is the function to handle the compiler error processing in GCC. */
335 internal_error_function (const char *msgid, va_list *ap)
338 char *buffer, *p, *loc;
339 String_Template temp, temp_loc;
340 Fat_Pointer fp, fp_loc;
343 /* Reset the pretty-printer. */
344 pp_clear_output_area (global_dc->printer);
346 /* Format the message into the pretty-printer. */
347 tinfo.format_spec = msgid;
349 tinfo.err_no = errno;
350 pp_format_verbatim (global_dc->printer, &tinfo);
352 /* Extract a (writable) pointer to the formatted text. */
353 buffer = xstrdup (pp_formatted_text (global_dc->printer));
355 /* Go up to the first newline. */
356 for (p = buffer; *p; p++)
364 temp.High_Bound = p - buffer;
368 s = expand_location (input_location);
369 if (flag_show_column && s.column != 0)
370 asprintf (&loc, "%s:%d:%d", s.file, s.line, s.column);
372 asprintf (&loc, "%s:%d", s.file, s.line);
373 temp_loc.Low_Bound = 1;
374 temp_loc.High_Bound = strlen (loc);
375 fp_loc.Bounds = &temp_loc;
378 Current_Error_Node = error_gnat_node;
379 Compiler_Abort (fp, -1, fp_loc);
382 /* Perform all the initialization steps that are language-specific. */
387 /* Do little here, most of the standard declarations are set up after the
388 front-end has been run. Use the same `char' as C, this doesn't really
389 matter since we'll use the explicit `unsigned char' for Character. */
390 build_common_tree_nodes (flag_signed_char, true);
392 /* In Ada, we use a signed type for SIZETYPE. Use the signed type
393 corresponding to the width of Pmode. In most cases when ptr_mode
394 and Pmode differ, C will use the width of ptr_mode for SIZETYPE.
395 But we get far better code using the width of Pmode. */
396 size_type_node = gnat_type_for_mode (Pmode, 0);
397 set_sizetype (size_type_node);
398 TYPE_NAME (sizetype) = get_identifier ("size_type");
400 /* In Ada, we use an unsigned 8-bit type for the default boolean type. */
401 boolean_type_node = make_unsigned_type (8);
402 TREE_SET_CODE (boolean_type_node, BOOLEAN_TYPE);
403 SET_TYPE_RM_MAX_VALUE (boolean_type_node,
404 build_int_cst (boolean_type_node, 1));
405 SET_TYPE_RM_SIZE (boolean_type_node, bitsize_int (1));
407 build_common_tree_nodes_2 (0);
408 sbitsize_one_node = sbitsize_int (1);
409 sbitsize_unit_node = sbitsize_int (BITS_PER_UNIT);
410 boolean_true_node = TYPE_MAX_VALUE (boolean_type_node);
412 ptr_void_type_node = build_pointer_type (void_type_node);
414 /* Show that REFERENCE_TYPEs are internal and should be Pmode. */
415 internal_reference_types ();
417 /* Add the input filename as the last argument. */
418 if (main_input_filename)
420 gnat_argv[gnat_argc] = xstrdup (main_input_filename);
422 gnat_argv[gnat_argc] = NULL;
425 /* Register our internal error function. */
426 global_dc->internal_error = &internal_error_function;
431 /* If we are using the GCC mechanism to process exception handling, we
432 have to register the personality routine for Ada and to initialize
433 various language dependent hooks. */
436 gnat_init_gcc_eh (void)
438 #ifdef DWARF2_UNWIND_INFO
439 /* lang_dependent_init already called dwarf2out_frame_init if true. */
440 int dwarf2out_frame_initialized = dwarf2out_do_frame ();
443 /* We shouldn't do anything if the No_Exceptions_Handler pragma is set,
444 though. This could for instance lead to the emission of tables with
445 references to symbols (such as the Ada eh personality routine) within
446 libraries we won't link against. */
447 if (No_Exception_Handlers_Set ())
450 /* Tell GCC we are handling cleanup actions through exception propagation.
451 This opens possibilities that we don't take advantage of yet, but is
452 nonetheless necessary to ensure that fixup code gets assigned to the
453 right exception regions. */
454 using_eh_for_cleanups ();
456 /* Turn on -fexceptions and -fnon-call-exceptions. The first one triggers
457 the generation of the necessary exception runtime tables. The second one
458 is useful for two reasons: 1/ we map some asynchronous signals like SEGV
459 to exceptions, so we need to ensure that the insns which can lead to such
460 signals are correctly attached to the exception region they pertain to,
461 2/ Some calls to pure subprograms are handled as libcall blocks and then
462 marked as "cannot trap" if the flag is not set (see emit_libcall_block).
463 We should not let this be since it is possible for such calls to actually
466 flag_non_call_exceptions = 1;
469 #ifdef DWARF2_UNWIND_INFO
470 if (!dwarf2out_frame_initialized && dwarf2out_do_frame ())
471 dwarf2out_frame_init ();
475 /* Print language-specific items in declaration NODE. */
478 gnat_print_decl (FILE *file, tree node, int indent)
480 switch (TREE_CODE (node))
483 print_node (file, "corresponding var",
484 DECL_CONST_CORRESPONDING_VAR (node), indent + 4);
488 print_node (file, "original field", DECL_ORIGINAL_FIELD (node),
493 print_node (file, "renamed object", DECL_RENAMED_OBJECT (node),
502 /* Print language-specific items in type NODE. */
505 gnat_print_type (FILE *file, tree node, int indent)
507 switch (TREE_CODE (node))
510 print_node (file, "ci/co list", TYPE_CI_CO_LIST (node), indent + 4);
514 if (TYPE_MODULAR_P (node))
515 print_node_brief (file, "modulus", TYPE_MODULUS (node), indent + 4);
516 else if (TYPE_HAS_ACTUAL_BOUNDS_P (node))
517 print_node (file, "actual bounds", TYPE_ACTUAL_BOUNDS (node),
519 else if (TYPE_VAX_FLOATING_POINT_P (node))
522 print_node (file, "index type", TYPE_INDEX_TYPE (node), indent + 4);
524 /* ... fall through ... */
528 print_node_brief (file, "RM size", TYPE_RM_SIZE (node), indent + 4);
530 /* ... fall through ... */
533 print_node_brief (file, "RM min", TYPE_RM_MIN_VALUE (node), indent + 4);
534 print_node_brief (file, "RM max", TYPE_RM_MAX_VALUE (node), indent + 4);
538 print_node (file,"actual bounds", TYPE_ACTUAL_BOUNDS (node), indent + 4);
542 print_node (file,"representative array",
543 TYPE_REPRESENTATIVE_ARRAY (node), indent + 4);
547 if (TYPE_FAT_POINTER_P (node) || TYPE_CONTAINS_TEMPLATE_P (node))
548 print_node (file, "unconstrained array",
549 TYPE_UNCONSTRAINED_ARRAY (node), indent + 4);
551 print_node (file, "Ada size", TYPE_ADA_SIZE (node), indent + 4);
555 case QUAL_UNION_TYPE:
556 print_node (file, "Ada size", TYPE_ADA_SIZE (node), indent + 4);
564 /* Return the name to be printed for DECL. */
567 gnat_printable_name (tree decl, int verbosity)
569 const char *coded_name = IDENTIFIER_POINTER (DECL_NAME (decl));
570 char *ada_name = (char *) ggc_alloc (strlen (coded_name) * 2 + 60);
572 __gnat_decode (coded_name, ada_name, 0);
574 if (verbosity == 2 && !DECL_IS_BUILTIN (decl))
576 Set_Identifier_Casing (ada_name, DECL_SOURCE_FILE (decl));
577 return ggc_strdup (Name_Buffer);
583 /* Return the name to be used in DWARF debug info for DECL. */
586 gnat_dwarf_name (tree decl, int verbosity ATTRIBUTE_UNUSED)
588 gcc_assert (DECL_P (decl));
589 return (const char *) IDENTIFIER_POINTER (DECL_NAME (decl));
592 /* Do nothing (return the tree node passed). */
595 gnat_return_tree (tree t)
600 /* Get the alias set corresponding to a type or expression. */
602 static alias_set_type
603 gnat_get_alias_set (tree type)
605 /* If this is a padding type, use the type of the first field. */
606 if (TYPE_IS_PADDING_P (type))
607 return get_alias_set (TREE_TYPE (TYPE_FIELDS (type)));
609 /* If the type is an unconstrained array, use the type of the
610 self-referential array we make. */
611 else if (TREE_CODE (type) == UNCONSTRAINED_ARRAY_TYPE)
613 get_alias_set (TREE_TYPE (TREE_TYPE (TYPE_FIELDS (TREE_TYPE (type)))));
615 /* If the type can alias any other types, return the alias set 0. */
616 else if (TYPE_P (type)
617 && TYPE_UNIVERSAL_ALIASING_P (TYPE_MAIN_VARIANT (type)))
623 /* GNU_TYPE is a type. Return its maximum size in bytes, if known,
624 as a constant when possible. */
627 gnat_type_max_size (const_tree gnu_type)
629 /* First see what we can get from TYPE_SIZE_UNIT, which might not
630 be constant even for simple expressions if it has already been
631 elaborated and possibly replaced by a VAR_DECL. */
632 tree max_unitsize = max_size (TYPE_SIZE_UNIT (gnu_type), true);
634 /* If we don't have a constant, see what we can get from TYPE_ADA_SIZE,
635 which should stay untouched. */
636 if (!host_integerp (max_unitsize, 1)
637 && (TREE_CODE (gnu_type) == RECORD_TYPE
638 || TREE_CODE (gnu_type) == UNION_TYPE
639 || TREE_CODE (gnu_type) == QUAL_UNION_TYPE)
640 && TYPE_ADA_SIZE (gnu_type))
642 tree max_adasize = max_size (TYPE_ADA_SIZE (gnu_type), true);
644 /* If we have succeeded in finding a constant, round it up to the
645 type's alignment and return the result in units. */
646 if (host_integerp (max_adasize, 1))
648 = size_binop (CEIL_DIV_EXPR,
649 round_up (max_adasize, TYPE_ALIGN (gnu_type)),
656 /* GNU_TYPE is a subtype of an integral type. Set LOWVAL to the low bound
657 and HIGHVAL to the high bound, respectively. */
660 gnat_get_subrange_bounds (const_tree gnu_type, tree *lowval, tree *highval)
662 *lowval = TYPE_MIN_VALUE (gnu_type);
663 *highval = TYPE_MAX_VALUE (gnu_type);
666 /* GNU_TYPE is a type. Determine if it should be passed by reference by
670 default_pass_by_ref (tree gnu_type)
672 /* We pass aggregates by reference if they are sufficiently large. The
673 choice of constant here is somewhat arbitrary. We also pass by
674 reference if the target machine would either pass or return by
675 reference. Strictly speaking, we need only check the return if this
676 is an In Out parameter, but it's probably best to err on the side of
677 passing more things by reference. */
679 if (pass_by_reference (NULL, TYPE_MODE (gnu_type), gnu_type, 1))
682 if (targetm.calls.return_in_memory (gnu_type, NULL_TREE))
685 if (AGGREGATE_TYPE_P (gnu_type)
686 && (!host_integerp (TYPE_SIZE (gnu_type), 1)
687 || 0 < compare_tree_int (TYPE_SIZE (gnu_type),
688 8 * TYPE_ALIGN (gnu_type))))
694 /* GNU_TYPE is the type of a subprogram parameter. Determine from the type if
695 it should be passed by reference. */
698 must_pass_by_ref (tree gnu_type)
700 /* We pass only unconstrained objects, those required by the language
701 to be passed by reference, and objects of variable size. The latter
702 is more efficient, avoids problems with variable size temporaries,
703 and does not produce compatibility problems with C, since C does
704 not have such objects. */
705 return (TREE_CODE (gnu_type) == UNCONSTRAINED_ARRAY_TYPE
706 || TREE_ADDRESSABLE (gnu_type)
707 || (TYPE_SIZE (gnu_type)
708 && TREE_CODE (TYPE_SIZE (gnu_type)) != INTEGER_CST));
711 /* This function is called by the front end to enumerate all the supported
712 modes for the machine. We pass a function which is called back with
713 the following integer parameters:
715 FLOAT_P nonzero if this represents a floating-point mode
716 COMPLEX_P nonzero is this represents a complex mode
717 COUNT count of number of items, nonzero for vector mode
718 PRECISION number of bits in data representation
719 MANTISSA number of bits in mantissa, if FP and known, else zero.
720 SIZE number of bits used to store data
721 ALIGN number of bits to which mode is aligned. */
724 enumerate_modes (void (*f) (int, int, int, int, int, int, unsigned int))
728 for (iloop = 0; iloop < NUM_MACHINE_MODES; iloop++)
730 enum machine_mode i = (enum machine_mode) iloop;
737 enum machine_mode inner_mode = i;
739 switch (GET_MODE_CLASS (i))
746 case MODE_COMPLEX_INT:
748 inner_mode = GET_MODE_INNER (i);
750 case MODE_COMPLEX_FLOAT:
753 inner_mode = GET_MODE_INNER (i);
755 case MODE_VECTOR_INT:
757 inner_mode = GET_MODE_INNER (i);
759 case MODE_VECTOR_FLOAT:
762 inner_mode = GET_MODE_INNER (i);
768 /* Skip this mode if it's one the front end doesn't need to know about
769 (e.g., the CC modes) or if there is no add insn for that mode (or
770 any wider mode), meaning it is not supported by the hardware. If
771 this a complex or vector mode, we care about the inner mode. */
772 for (j = inner_mode; j != VOIDmode; j = GET_MODE_WIDER_MODE (j))
773 if (optab_handler (add_optab, j)->insn_code != CODE_FOR_nothing)
778 const struct real_format *fmt = REAL_MODE_FORMAT (inner_mode);
783 if (!skip_p && j != VOIDmode)
784 (*f) (float_p, complex_p, vector_p ? GET_MODE_NUNITS (i) : 0,
785 GET_MODE_BITSIZE (i), mantissa,
786 GET_MODE_SIZE (i) * BITS_PER_UNIT, GET_MODE_ALIGNMENT (i));
790 /* Return the size of the FP mode with precision PREC. */
793 fp_prec_to_size (int prec)
795 enum machine_mode mode;
797 for (mode = GET_CLASS_NARROWEST_MODE (MODE_FLOAT); mode != VOIDmode;
798 mode = GET_MODE_WIDER_MODE (mode))
799 if (GET_MODE_PRECISION (mode) == prec)
800 return GET_MODE_BITSIZE (mode);
805 /* Return the precision of the FP mode with size SIZE. */
808 fp_size_to_prec (int size)
810 enum machine_mode mode;
812 for (mode = GET_CLASS_NARROWEST_MODE (MODE_FLOAT); mode != VOIDmode;
813 mode = GET_MODE_WIDER_MODE (mode))
814 if (GET_MODE_BITSIZE (mode) == size)
815 return GET_MODE_PRECISION (mode);
820 static GTY(()) tree gnat_eh_personality_decl;
823 gnat_eh_personality (void)
825 if (!gnat_eh_personality_decl)
826 gnat_eh_personality_decl
827 = build_personality_function (USING_SJLJ_EXCEPTIONS
828 ? "__gnat_eh_personality_sj"
829 : "__gnat_eh_personality");
831 return gnat_eh_personality_decl;
834 #include "gt-ada-misc.h"