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"
41 #include "langhooks.h"
42 #include "langhooks-def.h"
46 #include "function.h" /* For pass_by_reference. */
49 #include "adadecode.h"
63 static bool gnat_init (void);
64 static unsigned int gnat_option_lang_mask (void);
65 static void gnat_init_options (unsigned int,
66 struct cl_decoded_option *);
67 static bool gnat_handle_option (size_t, const char *, int, int,
68 const struct cl_option_handlers *);
69 static bool gnat_post_options (const char **);
70 static alias_set_type gnat_get_alias_set (tree);
71 static void gnat_print_decl (FILE *, tree, int);
72 static void gnat_print_type (FILE *, tree, int);
73 static const char *gnat_printable_name (tree, int);
74 static const char *gnat_dwarf_name (tree, int);
75 static bool gnat_type_hash_eq (const_tree, const_tree);
76 static tree gnat_return_tree (tree);
77 static void gnat_parse_file (int);
78 static void internal_error_function (diagnostic_context *,
79 const char *, va_list *);
80 static tree gnat_type_max_size (const_tree);
81 static void gnat_get_subrange_bounds (const_tree, tree *, tree *);
82 static tree gnat_eh_personality (void);
84 /* Definitions for our language-specific hooks. */
86 #undef LANG_HOOKS_NAME
87 #define LANG_HOOKS_NAME "GNU Ada"
88 #undef LANG_HOOKS_IDENTIFIER_SIZE
89 #define LANG_HOOKS_IDENTIFIER_SIZE sizeof (struct tree_identifier)
90 #undef LANG_HOOKS_INIT
91 #define LANG_HOOKS_INIT gnat_init
92 #undef LANG_HOOKS_OPTION_LANG_MASK
93 #define LANG_HOOKS_OPTION_LANG_MASK gnat_option_lang_mask
94 #undef LANG_HOOKS_INIT_OPTIONS
95 #define LANG_HOOKS_INIT_OPTIONS gnat_init_options
96 #undef LANG_HOOKS_HANDLE_OPTION
97 #define LANG_HOOKS_HANDLE_OPTION gnat_handle_option
98 #undef LANG_HOOKS_POST_OPTIONS
99 #define LANG_HOOKS_POST_OPTIONS gnat_post_options
100 #undef LANG_HOOKS_PARSE_FILE
101 #define LANG_HOOKS_PARSE_FILE gnat_parse_file
102 #undef LANG_HOOKS_TYPE_HASH_EQ
103 #define LANG_HOOKS_TYPE_HASH_EQ gnat_type_hash_eq
104 #undef LANG_HOOKS_GETDECLS
105 #define LANG_HOOKS_GETDECLS lhd_return_null_tree_v
106 #undef LANG_HOOKS_PUSHDECL
107 #define LANG_HOOKS_PUSHDECL gnat_return_tree
108 #undef LANG_HOOKS_WRITE_GLOBALS
109 #define LANG_HOOKS_WRITE_GLOBALS gnat_write_global_declarations
110 #undef LANG_HOOKS_GET_ALIAS_SET
111 #define LANG_HOOKS_GET_ALIAS_SET gnat_get_alias_set
112 #undef LANG_HOOKS_PRINT_DECL
113 #define LANG_HOOKS_PRINT_DECL gnat_print_decl
114 #undef LANG_HOOKS_PRINT_TYPE
115 #define LANG_HOOKS_PRINT_TYPE gnat_print_type
116 #undef LANG_HOOKS_TYPE_MAX_SIZE
117 #define LANG_HOOKS_TYPE_MAX_SIZE gnat_type_max_size
118 #undef LANG_HOOKS_DECL_PRINTABLE_NAME
119 #define LANG_HOOKS_DECL_PRINTABLE_NAME gnat_printable_name
120 #undef LANG_HOOKS_DWARF_NAME
121 #define LANG_HOOKS_DWARF_NAME gnat_dwarf_name
122 #undef LANG_HOOKS_GIMPLIFY_EXPR
123 #define LANG_HOOKS_GIMPLIFY_EXPR gnat_gimplify_expr
124 #undef LANG_HOOKS_TYPE_FOR_MODE
125 #define LANG_HOOKS_TYPE_FOR_MODE gnat_type_for_mode
126 #undef LANG_HOOKS_TYPE_FOR_SIZE
127 #define LANG_HOOKS_TYPE_FOR_SIZE gnat_type_for_size
128 #undef LANG_HOOKS_TYPES_COMPATIBLE_P
129 #define LANG_HOOKS_TYPES_COMPATIBLE_P gnat_types_compatible_p
130 #undef LANG_HOOKS_GET_SUBRANGE_BOUNDS
131 #define LANG_HOOKS_GET_SUBRANGE_BOUNDS gnat_get_subrange_bounds
132 #undef LANG_HOOKS_ATTRIBUTE_TABLE
133 #define LANG_HOOKS_ATTRIBUTE_TABLE gnat_internal_attribute_table
134 #undef LANG_HOOKS_BUILTIN_FUNCTION
135 #define LANG_HOOKS_BUILTIN_FUNCTION gnat_builtin_function
136 #undef LANG_HOOKS_EH_PERSONALITY
137 #define LANG_HOOKS_EH_PERSONALITY gnat_eh_personality
138 #undef LANG_HOOKS_DEEP_UNSHARING
139 #define LANG_HOOKS_DEEP_UNSHARING true
141 struct lang_hooks lang_hooks = LANG_HOOKS_INITIALIZER;
143 /* This symbol needs to be defined for the front-end. */
144 void *callgraph_info_file = NULL;
146 /* How much we want of our DWARF extensions. Some of our dwarf+ extensions
147 are incompatible with regular GDB versions, so we must make sure to only
148 produce them on explicit request. This is eventually reflected into the
149 use_gnu_debug_info_extensions common flag for later processing. */
150 static int gnat_dwarf_extensions = 0;
152 /* Command-line argc and argv. These variables are global
153 since they are imported in back_end.adb. */
154 unsigned int save_argc;
155 const char **save_argv;
157 /* GNAT argc and argv. */
158 extern int gnat_argc;
159 extern char **gnat_argv;
161 /* Declare functions we use as part of startup. */
162 extern void __gnat_initialize (void *);
163 extern void __gnat_install_SEH_handler (void *);
164 extern void adainit (void);
165 extern void _ada_gnat1drv (void);
167 /* The parser for the language. For us, we process the GNAT tree. */
170 gnat_parse_file (int set_yydebug ATTRIBUTE_UNUSED)
174 /* Call the target specific initializations. */
175 __gnat_initialize (NULL);
177 /* ??? Call the SEH initialization routine. This is to workaround
178 a bootstrap path problem. The call below should be removed at some
179 point and the SEH pointer passed to __gnat_initialize() above. */
180 __gnat_install_SEH_handler((void *)seh);
182 /* Call the front-end elaboration procedures. */
185 /* Call the front end. */
189 /* Decode all the language specific options that cannot be decoded by GCC.
190 The option decoding phase of GCC calls this routine on the flags that
191 are marked as Ada-specific. Return true on success or false on failure. */
194 gnat_handle_option (size_t scode, const char *arg ATTRIBUTE_UNUSED, int value,
195 int kind ATTRIBUTE_UNUSED,
196 const struct cl_option_handlers *handlers ATTRIBUTE_UNUSED)
198 enum opt_code code = (enum opt_code) scode;
204 warn_uninitialized = value;
207 case OPT_Wmissing_prototypes:
208 case OPT_Wstrict_prototypes:
209 case OPT_Wwrite_strings:
211 case OPT_Wvariadic_macros:
212 case OPT_Wold_style_definition:
213 case OPT_Wmissing_format_attribute:
214 case OPT_Woverlength_strings:
215 /* These are used in the GCC Makefile. */
218 case OPT_feliminate_unused_debug_types:
219 /* We arrange for post_option to be able to only set the corresponding
220 flag to 1 when explicitly requested by the user. We expect the
221 default flag value to be either 0 or positive, and expose a positive
222 -f as a negative value to post_option. */
223 flag_eliminate_unused_debug_types = -value;
227 gnat_dwarf_extensions = 1;
231 warning (0, "%<-gnat%> misspelled as %<-gant%>");
233 /* ... fall through ... */
241 /* These are handled by the front-end. */
251 /* Return language mask for option processing. */
254 gnat_option_lang_mask (void)
259 /* Initialize for option processing. */
262 gnat_init_options (unsigned int decoded_options_count,
263 struct cl_decoded_option *decoded_options)
265 /* Reconstruct an argv array for use of back_end.adb.
267 ??? back_end.adb should not rely on this; instead, it should work
268 with decoded options without such reparsing, to ensure
269 consistency in how options are decoded. */
272 save_argv = XNEWVEC (const char *, 2 * decoded_options_count + 1);
274 for (i = 0; i < decoded_options_count; i++)
276 if (decoded_options[i].errors
277 || decoded_options[i].opt_index == OPT_SPECIAL_unknown
278 || decoded_options[i].canonical_option_num_elements == 0)
280 if (decoded_options[i].opt_index == OPT_I)
282 gcc_assert (decoded_options[i].canonical_option_num_elements == 2);
283 save_argv[save_argc++]
284 = concat (decoded_options[i].canonical_option[0],
285 decoded_options[i].canonical_option[1], NULL);
289 gcc_assert (decoded_options[i].canonical_option_num_elements >= 1
290 && decoded_options[i].canonical_option_num_elements <= 2);
291 save_argv[save_argc++] = decoded_options[i].canonical_option[0];
292 if (decoded_options[i].canonical_option_num_elements >= 2)
293 save_argv[save_argc++] = decoded_options[i].canonical_option[1];
296 save_argv[save_argc] = NULL;
298 gnat_argv = (char **) xmalloc (sizeof (save_argv[0]));
299 gnat_argv[0] = xstrdup (save_argv[0]); /* name of the command */
302 /* Uninitialized really means uninitialized in Ada. */
303 flag_zero_initialized_in_bss = 0;
306 /* Post-switch processing. */
309 gnat_post_options (const char **pfilename ATTRIBUTE_UNUSED)
311 /* Excess precision other than "fast" requires front-end
313 if (flag_excess_precision_cmdline == EXCESS_PRECISION_STANDARD
314 && TARGET_FLT_EVAL_METHOD_NON_DEFAULT)
315 sorry ("-fexcess-precision=standard for Ada");
316 flag_excess_precision_cmdline = EXCESS_PRECISION_FAST;
318 /* ??? The warning machinery is outsmarted by Ada. */
319 warn_unused_parameter = 0;
321 /* No psABI change warnings for Ada. */
324 /* Force eliminate_unused_debug_types to 0 unless an explicit positive
325 -f has been passed. This forces the default to 0 for Ada, which might
326 differ from the common default. */
327 if (flag_eliminate_unused_debug_types < 0)
328 flag_eliminate_unused_debug_types = 1;
330 flag_eliminate_unused_debug_types = 0;
332 /* Reflect the explicit request of DWARF extensions into the common
333 flag for use by later passes. */
334 if (write_symbols == DWARF2_DEBUG)
335 use_gnu_debug_info_extensions = gnat_dwarf_extensions > 0;
340 /* Here is the function to handle the compiler error processing in GCC. */
343 internal_error_function (diagnostic_context *context,
344 const char *msgid, va_list *ap)
347 char *buffer, *p, *loc;
348 String_Template temp, temp_loc;
349 Fat_Pointer fp, fp_loc;
352 /* Warn if plugins present. */
355 /* Reset the pretty-printer. */
356 pp_clear_output_area (context->printer);
358 /* Format the message into the pretty-printer. */
359 tinfo.format_spec = msgid;
361 tinfo.err_no = errno;
362 pp_format_verbatim (context->printer, &tinfo);
364 /* Extract a (writable) pointer to the formatted text. */
365 buffer = xstrdup (pp_formatted_text (context->printer));
367 /* Go up to the first newline. */
368 for (p = buffer; *p; p++)
376 temp.High_Bound = p - buffer;
380 s = expand_location (input_location);
381 if (context->show_column && s.column != 0)
382 asprintf (&loc, "%s:%d:%d", s.file, s.line, s.column);
384 asprintf (&loc, "%s:%d", s.file, s.line);
385 temp_loc.Low_Bound = 1;
386 temp_loc.High_Bound = strlen (loc);
387 fp_loc.Bounds = &temp_loc;
390 Current_Error_Node = error_gnat_node;
391 Compiler_Abort (fp, -1, fp_loc);
394 /* Perform all the initialization steps that are language-specific. */
399 /* Do little here, most of the standard declarations are set up after the
400 front-end has been run. Use the same `char' as C, this doesn't really
401 matter since we'll use the explicit `unsigned char' for Character. */
402 build_common_tree_nodes (flag_signed_char);
404 /* In Ada, we use the unsigned type corresponding to the width of Pmode as
405 SIZETYPE. In most cases when ptr_mode and Pmode differ, C will use the
406 width of ptr_mode for SIZETYPE, but we get better code using the width
407 of Pmode. Note that, although we manipulate negative offsets for some
408 internal constructs and rely on compile time overflow detection in size
409 computations, using unsigned types for SIZETYPEs is fine since they are
410 treated specially by the middle-end, in particular sign-extended. */
411 size_type_node = gnat_type_for_mode (Pmode, 1);
412 set_sizetype (size_type_node);
413 TYPE_NAME (sizetype) = get_identifier ("size_type");
415 /* In Ada, we use an unsigned 8-bit type for the default boolean type. */
416 boolean_type_node = make_unsigned_type (8);
417 TREE_SET_CODE (boolean_type_node, BOOLEAN_TYPE);
418 SET_TYPE_RM_MAX_VALUE (boolean_type_node,
419 build_int_cst (boolean_type_node, 1));
420 SET_TYPE_RM_SIZE (boolean_type_node, bitsize_int (1));
422 build_common_tree_nodes_2 (0);
423 sbitsize_one_node = sbitsize_int (1);
424 sbitsize_unit_node = sbitsize_int (BITS_PER_UNIT);
425 boolean_true_node = TYPE_MAX_VALUE (boolean_type_node);
427 ptr_void_type_node = build_pointer_type (void_type_node);
429 /* Show that REFERENCE_TYPEs are internal and should be Pmode. */
430 internal_reference_types ();
432 /* Register our internal error function. */
433 global_dc->internal_error = &internal_error_function;
438 /* If we are using the GCC mechanism to process exception handling, we
439 have to register the personality routine for Ada and to initialize
440 various language dependent hooks. */
443 gnat_init_gcc_eh (void)
445 #ifdef DWARF2_UNWIND_INFO
446 /* lang_dependent_init already called dwarf2out_frame_init if true. */
447 int dwarf2out_frame_initialized = dwarf2out_do_frame ();
450 /* We shouldn't do anything if the No_Exceptions_Handler pragma is set,
451 though. This could for instance lead to the emission of tables with
452 references to symbols (such as the Ada eh personality routine) within
453 libraries we won't link against. */
454 if (No_Exception_Handlers_Set ())
457 /* Tell GCC we are handling cleanup actions through exception propagation.
458 This opens possibilities that we don't take advantage of yet, but is
459 nonetheless necessary to ensure that fixup code gets assigned to the
460 right exception regions. */
461 using_eh_for_cleanups ();
463 /* Turn on -fexceptions and -fnon-call-exceptions. The first one triggers
464 the generation of the necessary exception tables. The second one is
465 useful for two reasons: 1/ we map some asynchronous signals like SEGV to
466 exceptions, so we need to ensure that the insns which can lead to such
467 signals are correctly attached to the exception region they pertain to,
468 2/ Some calls to pure subprograms are handled as libcall blocks and then
469 marked as "cannot trap" if the flag is not set (see emit_libcall_block).
470 We should not let this be since it is possible for such calls to actually
473 flag_non_call_exceptions = 1;
476 #ifdef DWARF2_UNWIND_INFO
477 if (!dwarf2out_frame_initialized && dwarf2out_do_frame ())
478 dwarf2out_frame_init ();
482 /* Print language-specific items in declaration NODE. */
485 gnat_print_decl (FILE *file, tree node, int indent)
487 switch (TREE_CODE (node))
490 print_node (file, "corresponding var",
491 DECL_CONST_CORRESPONDING_VAR (node), indent + 4);
495 print_node (file, "original field", DECL_ORIGINAL_FIELD (node),
500 print_node (file, "renamed object", DECL_RENAMED_OBJECT (node),
509 /* Print language-specific items in type NODE. */
512 gnat_print_type (FILE *file, tree node, int indent)
514 switch (TREE_CODE (node))
517 print_node (file, "ci/co list", TYPE_CI_CO_LIST (node), indent + 4);
521 if (TYPE_MODULAR_P (node))
522 print_node_brief (file, "modulus", TYPE_MODULUS (node), indent + 4);
523 else if (TYPE_HAS_ACTUAL_BOUNDS_P (node))
524 print_node (file, "actual bounds", TYPE_ACTUAL_BOUNDS (node),
526 else if (TYPE_VAX_FLOATING_POINT_P (node))
529 print_node (file, "index type", TYPE_INDEX_TYPE (node), indent + 4);
531 /* ... fall through ... */
535 print_node_brief (file, "RM size", TYPE_RM_SIZE (node), indent + 4);
537 /* ... fall through ... */
540 print_node_brief (file, "RM min", TYPE_RM_MIN_VALUE (node), indent + 4);
541 print_node_brief (file, "RM max", TYPE_RM_MAX_VALUE (node), indent + 4);
545 print_node (file,"actual bounds", TYPE_ACTUAL_BOUNDS (node), indent + 4);
549 print_node (file,"representative array",
550 TYPE_REPRESENTATIVE_ARRAY (node), indent + 4);
554 if (TYPE_FAT_POINTER_P (node) || TYPE_CONTAINS_TEMPLATE_P (node))
555 print_node (file, "unconstrained array",
556 TYPE_UNCONSTRAINED_ARRAY (node), indent + 4);
558 print_node (file, "Ada size", TYPE_ADA_SIZE (node), indent + 4);
562 case QUAL_UNION_TYPE:
563 print_node (file, "Ada size", TYPE_ADA_SIZE (node), indent + 4);
571 /* Return the name to be printed for DECL. */
574 gnat_printable_name (tree decl, int verbosity)
576 const char *coded_name = IDENTIFIER_POINTER (DECL_NAME (decl));
577 char *ada_name = (char *) ggc_alloc_atomic (strlen (coded_name) * 2 + 60);
579 __gnat_decode (coded_name, ada_name, 0);
581 if (verbosity == 2 && !DECL_IS_BUILTIN (decl))
583 Set_Identifier_Casing (ada_name, DECL_SOURCE_FILE (decl));
584 return ggc_strdup (Name_Buffer);
590 /* Return the name to be used in DWARF debug info for DECL. */
593 gnat_dwarf_name (tree decl, int verbosity ATTRIBUTE_UNUSED)
595 gcc_assert (DECL_P (decl));
596 return (const char *) IDENTIFIER_POINTER (DECL_NAME (decl));
599 /* Return true if types T1 and T2 are identical for type hashing purposes.
600 Called only after doing all language independent checks. At present,
601 this function is only called when both types are FUNCTION_TYPE. */
604 gnat_type_hash_eq (const_tree t1, const_tree t2)
606 gcc_assert (TREE_CODE (t1) == FUNCTION_TYPE);
607 return fntype_same_flags_p (t1, TYPE_CI_CO_LIST (t2),
608 TYPE_RETURN_UNCONSTRAINED_P (t2),
609 TYPE_RETURN_BY_DIRECT_REF_P (t2),
610 TREE_ADDRESSABLE (t2));
613 /* Do nothing (return the tree node passed). */
616 gnat_return_tree (tree t)
621 /* Get the alias set corresponding to a type or expression. */
623 static alias_set_type
624 gnat_get_alias_set (tree type)
626 /* If this is a padding type, use the type of the first field. */
627 if (TYPE_IS_PADDING_P (type))
628 return get_alias_set (TREE_TYPE (TYPE_FIELDS (type)));
630 /* If the type is an unconstrained array, use the type of the
631 self-referential array we make. */
632 else if (TREE_CODE (type) == UNCONSTRAINED_ARRAY_TYPE)
634 get_alias_set (TREE_TYPE (TREE_TYPE (TYPE_FIELDS (TREE_TYPE (type)))));
636 /* If the type can alias any other types, return the alias set 0. */
637 else if (TYPE_P (type)
638 && TYPE_UNIVERSAL_ALIASING_P (TYPE_MAIN_VARIANT (type)))
644 /* GNU_TYPE is a type. Return its maximum size in bytes, if known,
645 as a constant when possible. */
648 gnat_type_max_size (const_tree gnu_type)
650 /* First see what we can get from TYPE_SIZE_UNIT, which might not
651 be constant even for simple expressions if it has already been
652 elaborated and possibly replaced by a VAR_DECL. */
653 tree max_unitsize = max_size (TYPE_SIZE_UNIT (gnu_type), true);
655 /* If we don't have a constant, see what we can get from TYPE_ADA_SIZE,
656 which should stay untouched. */
657 if (!host_integerp (max_unitsize, 1)
658 && (TREE_CODE (gnu_type) == RECORD_TYPE
659 || TREE_CODE (gnu_type) == UNION_TYPE
660 || TREE_CODE (gnu_type) == QUAL_UNION_TYPE)
661 && TYPE_ADA_SIZE (gnu_type))
663 tree max_adasize = max_size (TYPE_ADA_SIZE (gnu_type), true);
665 /* If we have succeeded in finding a constant, round it up to the
666 type's alignment and return the result in units. */
667 if (host_integerp (max_adasize, 1))
669 = size_binop (CEIL_DIV_EXPR,
670 round_up (max_adasize, TYPE_ALIGN (gnu_type)),
677 /* GNU_TYPE is a subtype of an integral type. Set LOWVAL to the low bound
678 and HIGHVAL to the high bound, respectively. */
681 gnat_get_subrange_bounds (const_tree gnu_type, tree *lowval, tree *highval)
683 *lowval = TYPE_MIN_VALUE (gnu_type);
684 *highval = TYPE_MAX_VALUE (gnu_type);
687 /* GNU_TYPE is a type. Determine if it should be passed by reference by
691 default_pass_by_ref (tree gnu_type)
693 /* We pass aggregates by reference if they are sufficiently large. The
694 choice of constant here is somewhat arbitrary. We also pass by
695 reference if the target machine would either pass or return by
696 reference. Strictly speaking, we need only check the return if this
697 is an In Out parameter, but it's probably best to err on the side of
698 passing more things by reference. */
700 if (pass_by_reference (NULL, TYPE_MODE (gnu_type), gnu_type, 1))
703 if (targetm.calls.return_in_memory (gnu_type, NULL_TREE))
706 if (AGGREGATE_TYPE_P (gnu_type)
707 && (!host_integerp (TYPE_SIZE (gnu_type), 1)
708 || 0 < compare_tree_int (TYPE_SIZE (gnu_type),
709 8 * TYPE_ALIGN (gnu_type))))
715 /* GNU_TYPE is the type of a subprogram parameter. Determine from the type if
716 it should be passed by reference. */
719 must_pass_by_ref (tree gnu_type)
721 /* We pass only unconstrained objects, those required by the language
722 to be passed by reference, and objects of variable size. The latter
723 is more efficient, avoids problems with variable size temporaries,
724 and does not produce compatibility problems with C, since C does
725 not have such objects. */
726 return (TREE_CODE (gnu_type) == UNCONSTRAINED_ARRAY_TYPE
727 || TREE_ADDRESSABLE (gnu_type)
728 || (TYPE_SIZE (gnu_type)
729 && TREE_CODE (TYPE_SIZE (gnu_type)) != INTEGER_CST));
732 /* Return the size of the FP mode with precision PREC. */
735 fp_prec_to_size (int prec)
737 enum machine_mode mode;
739 for (mode = GET_CLASS_NARROWEST_MODE (MODE_FLOAT); mode != VOIDmode;
740 mode = GET_MODE_WIDER_MODE (mode))
741 if (GET_MODE_PRECISION (mode) == prec)
742 return GET_MODE_BITSIZE (mode);
747 /* Return the precision of the FP mode with size SIZE. */
750 fp_size_to_prec (int size)
752 enum machine_mode mode;
754 for (mode = GET_CLASS_NARROWEST_MODE (MODE_FLOAT); mode != VOIDmode;
755 mode = GET_MODE_WIDER_MODE (mode))
756 if (GET_MODE_BITSIZE (mode) == size)
757 return GET_MODE_PRECISION (mode);
762 static GTY(()) tree gnat_eh_personality_decl;
765 gnat_eh_personality (void)
767 if (!gnat_eh_personality_decl)
768 gnat_eh_personality_decl
769 = build_personality_function (targetm.except_unwind_info () == UI_SJLJ
770 ? "__gnat_eh_personality_sj"
771 : "__gnat_eh_personality");
773 return gnat_eh_personality_decl;
776 #include "gt-ada-misc.h"