1 /****************************************************************************
3 * GNAT COMPILER COMPONENTS *
7 * C Implementation File *
9 * Copyright (C) 1992-2009, 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);
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 int gnat_eh_type_covers (tree, tree);
78 static void gnat_parse_file (int);
79 static void internal_error_function (const char *, va_list *);
80 static tree gnat_type_max_size (const_tree);
81 static void gnat_get_subrange_bounds (const_tree, tree *, tree *);
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_MARK_ADDRESSABLE
110 #define LANG_HOOKS_MARK_ADDRESSABLE gnat_mark_addressable
111 #undef LANG_HOOKS_PRINT_DECL
112 #define LANG_HOOKS_PRINT_DECL gnat_print_decl
113 #undef LANG_HOOKS_PRINT_TYPE
114 #define LANG_HOOKS_PRINT_TYPE gnat_print_type
115 #undef LANG_HOOKS_TYPE_MAX_SIZE
116 #define LANG_HOOKS_TYPE_MAX_SIZE gnat_type_max_size
117 #undef LANG_HOOKS_DECL_PRINTABLE_NAME
118 #define LANG_HOOKS_DECL_PRINTABLE_NAME gnat_printable_name
119 #undef LANG_HOOKS_DWARF_NAME
120 #define LANG_HOOKS_DWARF_NAME gnat_dwarf_name
121 #undef LANG_HOOKS_GIMPLIFY_EXPR
122 #define LANG_HOOKS_GIMPLIFY_EXPR gnat_gimplify_expr
123 #undef LANG_HOOKS_TYPE_FOR_MODE
124 #define LANG_HOOKS_TYPE_FOR_MODE gnat_type_for_mode
125 #undef LANG_HOOKS_TYPE_FOR_SIZE
126 #define LANG_HOOKS_TYPE_FOR_SIZE gnat_type_for_size
127 #undef LANG_HOOKS_TYPES_COMPATIBLE_P
128 #define LANG_HOOKS_TYPES_COMPATIBLE_P gnat_types_compatible_p
129 #undef LANG_HOOKS_GET_SUBRANGE_BOUNDS
130 #define LANG_HOOKS_GET_SUBRANGE_BOUNDS gnat_get_subrange_bounds
131 #undef LANG_HOOKS_ATTRIBUTE_TABLE
132 #define LANG_HOOKS_ATTRIBUTE_TABLE gnat_internal_attribute_table
133 #undef LANG_HOOKS_BUILTIN_FUNCTION
134 #define LANG_HOOKS_BUILTIN_FUNCTION gnat_builtin_function
136 const 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. */
180 /* We always have a single compilation unit in Ada. */
181 cgraph_finalize_compilation_unit ();
184 /* Decode all the language specific options that cannot be decoded by GCC.
185 The option decoding phase of GCC calls this routine on the flags that
186 it cannot decode. Return the number of consecutive arguments from ARGV
187 that have been successfully decoded or 0 on failure. */
190 gnat_handle_option (size_t scode, const char *arg, int value)
192 const struct cl_option *option = &cl_options[scode];
193 enum opt_code code = (enum opt_code) scode;
196 if (arg == NULL && (option->flags & (CL_JOINED | CL_SEPARATE)))
198 error ("missing argument to \"-%s\"", option->opt_text);
205 q = XNEWVEC (char, sizeof("-I") + strlen (arg));
208 gnat_argv[gnat_argc] = q;
215 /* We save the value of warn_uninitialized, since if they put
216 -Wuninitialized on the command line, we need to generate a
217 warning about not using it without also specifying -O. */
218 if (warn_uninitialized != 1)
219 warn_uninitialized = (value ? 2 : 0);
222 /* These are used in the GCC Makefile. */
223 case OPT_Wmissing_prototypes:
224 case OPT_Wstrict_prototypes:
225 case OPT_Wwrite_strings:
227 case OPT_Wvariadic_macros:
228 case OPT_Wold_style_definition:
229 case OPT_Wmissing_format_attribute:
230 case OPT_Woverlength_strings:
233 /* This is handled by the front-end. */
238 gnat_argv[gnat_argc] = xstrdup ("-nostdlib");
242 case OPT_feliminate_unused_debug_types:
243 /* We arrange for post_option to be able to only set the corresponding
244 flag to 1 when explicitly requested by the user. We expect the
245 default flag value to be either 0 or positive, and expose a positive
246 -f as a negative value to post_option. */
247 flag_eliminate_unused_debug_types = -value;
251 gnat_argv[gnat_argc] = xstrdup ("-fRTS");
256 warning (0, "%<-gnat%> misspelled as %<-gant%>");
258 /* ... fall through ... */
261 /* Recopy the switches without the 'gnat' prefix. */
262 gnat_argv[gnat_argc] = XNEWVEC (char, strlen (arg) + 2);
263 gnat_argv[gnat_argc][0] = '-';
264 strcpy (gnat_argv[gnat_argc] + 1, arg);
269 gnat_argv[gnat_argc] = xstrdup ("-O");
271 gnat_argv[gnat_argc] = xstrdup (arg);
276 gnat_dwarf_extensions ++;
286 /* Initialize for option processing. */
289 gnat_init_options (unsigned int argc, const char **argv)
291 /* Initialize gnat_argv with save_argv size. */
292 gnat_argv = (char **) xmalloc ((argc + 1) * sizeof (argv[0]));
293 gnat_argv[0] = xstrdup (argv[0]); /* name of the command */
299 /* Uninitialized really means uninitialized in Ada. */
300 flag_zero_initialized_in_bss = 0;
305 /* Post-switch processing. */
308 gnat_post_options (const char **pfilename ATTRIBUTE_UNUSED)
310 /* Excess precision other than "fast" requires front-end
312 if (flag_excess_precision_cmdline == EXCESS_PRECISION_STANDARD
313 && TARGET_FLT_EVAL_METHOD_NON_DEFAULT)
314 sorry ("-fexcess-precision=standard for Ada");
315 flag_excess_precision_cmdline = EXCESS_PRECISION_FAST;
317 /* ??? The warning machinery is outsmarted by Ada. */
318 warn_unused_parameter = 0;
320 /* No psABI change warnings for Ada. */
323 /* Force eliminate_unused_debug_types to 0 unless an explicit positive
324 -f has been passed. This forces the default to 0 for Ada, which might
325 differ from the common default. */
326 if (flag_eliminate_unused_debug_types < 0)
327 flag_eliminate_unused_debug_types = 1;
329 flag_eliminate_unused_debug_types = 0;
331 /* Reflect the explicit request of DWARF extensions into the common
332 flag for use by later passes. */
333 if (write_symbols == DWARF2_DEBUG)
334 use_gnu_debug_info_extensions = gnat_dwarf_extensions > 0;
339 /* Here is the function to handle the compiler error processing in GCC. */
342 internal_error_function (const char *msgid, va_list *ap)
345 char *buffer, *p, *loc;
346 String_Template temp, temp_loc;
347 Fat_Pointer fp, fp_loc;
350 /* Reset the pretty-printer. */
351 pp_clear_output_area (global_dc->printer);
353 /* Format the message into the pretty-printer. */
354 tinfo.format_spec = msgid;
356 tinfo.err_no = errno;
357 pp_format_verbatim (global_dc->printer, &tinfo);
359 /* Extract a (writable) pointer to the formatted text. */
360 buffer = xstrdup (pp_formatted_text (global_dc->printer));
362 /* Go up to the first newline. */
363 for (p = buffer; *p; p++)
371 temp.High_Bound = p - buffer;
375 s = expand_location (input_location);
376 if (flag_show_column && s.column != 0)
377 asprintf (&loc, "%s:%d:%d", s.file, s.line, s.column);
379 asprintf (&loc, "%s:%d", s.file, s.line);
380 temp_loc.Low_Bound = 1;
381 temp_loc.High_Bound = strlen (loc);
382 fp_loc.Bounds = &temp_loc;
385 Current_Error_Node = error_gnat_node;
386 Compiler_Abort (fp, -1, fp_loc);
389 /* Perform all the initialization steps that are language-specific. */
394 /* Performs whatever initialization steps needed by the language-dependent
396 gnat_init_decl_processing ();
398 /* Add the input filename as the last argument. */
399 if (main_input_filename)
401 gnat_argv[gnat_argc] = xstrdup (main_input_filename);
403 gnat_argv[gnat_argc] = NULL;
406 global_dc->internal_error = &internal_error_function;
408 /* Show that REFERENCE_TYPEs are internal and should be Pmode. */
409 internal_reference_types ();
414 /* If we are using the GCC mechanism to process exception handling, we
415 have to register the personality routine for Ada and to initialize
416 various language dependent hooks. */
419 gnat_init_gcc_eh (void)
421 #ifdef DWARF2_UNWIND_INFO
422 /* lang_dependent_init already called dwarf2out_frame_init if true. */
423 int dwarf2out_frame_initialized = dwarf2out_do_frame ();
426 /* We shouldn't do anything if the No_Exceptions_Handler pragma is set,
427 though. This could for instance lead to the emission of tables with
428 references to symbols (such as the Ada eh personality routine) within
429 libraries we won't link against. */
430 if (No_Exception_Handlers_Set ())
433 /* Tell GCC we are handling cleanup actions through exception propagation.
434 This opens possibilities that we don't take advantage of yet, but is
435 nonetheless necessary to ensure that fixup code gets assigned to the
436 right exception regions. */
437 using_eh_for_cleanups ();
439 eh_personality_libfunc = init_one_libfunc (USING_SJLJ_EXCEPTIONS
440 ? "__gnat_eh_personality_sj"
441 : "__gnat_eh_personality");
442 lang_eh_type_covers = gnat_eh_type_covers;
443 lang_eh_runtime_type = gnat_return_tree;
444 default_init_unwind_resume_libfunc ();
446 /* Turn on -fexceptions and -fnon-call-exceptions. The first one triggers
447 the generation of the necessary exception runtime tables. The second one
448 is useful for two reasons: 1/ we map some asynchronous signals like SEGV
449 to exceptions, so we need to ensure that the insns which can lead to such
450 signals are correctly attached to the exception region they pertain to,
451 2/ Some calls to pure subprograms are handled as libcall blocks and then
452 marked as "cannot trap" if the flag is not set (see emit_libcall_block).
453 We should not let this be since it is possible for such calls to actually
456 flag_non_call_exceptions = 1;
459 #ifdef DWARF2_UNWIND_INFO
460 if (!dwarf2out_frame_initialized && dwarf2out_do_frame ())
461 dwarf2out_frame_init ();
465 /* Print language-specific items in declaration NODE. */
468 gnat_print_decl (FILE *file, tree node, int indent)
470 switch (TREE_CODE (node))
473 print_node (file, "const_corresponding_var",
474 DECL_CONST_CORRESPONDING_VAR (node), indent + 4);
478 print_node (file, "original_field", DECL_ORIGINAL_FIELD (node),
483 print_node (file, "renamed_object", DECL_RENAMED_OBJECT (node),
492 /* Print language-specific items in type NODE. */
495 gnat_print_type (FILE *file, tree node, int indent)
497 switch (TREE_CODE (node))
500 print_node (file, "ci_co_list", TYPE_CI_CO_LIST (node), indent + 4);
504 if (TYPE_MODULAR_P (node))
505 print_node_brief (file, "modulus", TYPE_MODULUS (node), indent + 4);
506 else if (TYPE_HAS_ACTUAL_BOUNDS_P (node))
507 print_node (file, "actual bounds", TYPE_ACTUAL_BOUNDS (node),
509 else if (TYPE_VAX_FLOATING_POINT_P (node))
512 print_node (file, "index type", TYPE_INDEX_TYPE (node), indent + 4);
514 /* ... fall through ... */
518 print_node_brief (file, "RM size", TYPE_RM_SIZE (node), indent + 4);
520 /* ... fall through ... */
523 print_node_brief (file, "RM min", TYPE_RM_MIN_VALUE (node), indent + 4);
524 print_node_brief (file, "RM max", TYPE_RM_MAX_VALUE (node), indent + 4);
528 print_node (file,"actual bounds", TYPE_ACTUAL_BOUNDS (node), indent + 4);
532 if (TYPE_IS_FAT_POINTER_P (node) || TYPE_CONTAINS_TEMPLATE_P (node))
533 print_node (file, "unconstrained array",
534 TYPE_UNCONSTRAINED_ARRAY (node), indent + 4);
536 print_node (file, "Ada size", TYPE_ADA_SIZE (node), indent + 4);
540 case QUAL_UNION_TYPE:
541 print_node (file, "Ada size", TYPE_ADA_SIZE (node), indent + 4);
549 /* Return the name to be printed for DECL. */
552 gnat_printable_name (tree decl, int verbosity)
554 const char *coded_name = IDENTIFIER_POINTER (DECL_NAME (decl));
555 char *ada_name = (char *) ggc_alloc (strlen (coded_name) * 2 + 60);
557 __gnat_decode (coded_name, ada_name, 0);
559 if (verbosity == 2 && !DECL_IS_BUILTIN (decl))
561 Set_Identifier_Casing (ada_name, DECL_SOURCE_FILE (decl));
562 return ggc_strdup (Name_Buffer);
568 /* Return the name to be used in DWARF debug info for DECL. */
571 gnat_dwarf_name (tree decl, int verbosity ATTRIBUTE_UNUSED)
573 gcc_assert (DECL_P (decl));
574 return (const char *) IDENTIFIER_POINTER (DECL_NAME (decl));
577 /* Do nothing (return the tree node passed). */
580 gnat_return_tree (tree t)
585 /* Return true if type A catches type B. Callback for flow analysis from
586 the exception handling part of the back-end. */
589 gnat_eh_type_covers (tree a, tree b)
591 /* a catches b if they represent the same exception id or if a
594 ??? integer_zero_node for "others" is hardwired in too many places
596 return (a == b || a == integer_zero_node);
599 /* Get the alias set corresponding to a type or expression. */
601 static alias_set_type
602 gnat_get_alias_set (tree type)
604 /* If this is a padding type, use the type of the first field. */
605 if (TREE_CODE (type) == RECORD_TYPE
606 && 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 tree min = TYPE_MIN_VALUE (gnu_type);
663 tree max = TYPE_MAX_VALUE (gnu_type);
664 /* If the bounds aren't constant, use non-representable constant values
665 to get the same effect on debug info without tree sharing issues. */
667 = TREE_CONSTANT (min) ? min : build_int_cstu (integer_type_node, -1);
669 = TREE_CONSTANT (max) ? max : build_int_cstu (integer_type_node, -1);
672 /* GNU_TYPE is a type. Determine if it should be passed by reference by
676 default_pass_by_ref (tree gnu_type)
678 /* We pass aggregates by reference if they are sufficiently large. The
679 choice of constant here is somewhat arbitrary. We also pass by
680 reference if the target machine would either pass or return by
681 reference. Strictly speaking, we need only check the return if this
682 is an In Out parameter, but it's probably best to err on the side of
683 passing more things by reference. */
685 if (pass_by_reference (NULL, TYPE_MODE (gnu_type), gnu_type, 1))
688 if (targetm.calls.return_in_memory (gnu_type, NULL_TREE))
691 if (AGGREGATE_TYPE_P (gnu_type)
692 && (!host_integerp (TYPE_SIZE (gnu_type), 1)
693 || 0 < compare_tree_int (TYPE_SIZE (gnu_type),
694 8 * TYPE_ALIGN (gnu_type))))
700 /* GNU_TYPE is the type of a subprogram parameter. Determine from the type if
701 it should be passed by reference. */
704 must_pass_by_ref (tree gnu_type)
706 /* We pass only unconstrained objects, those required by the language
707 to be passed by reference, and objects of variable size. The latter
708 is more efficient, avoids problems with variable size temporaries,
709 and does not produce compatibility problems with C, since C does
710 not have such objects. */
711 return (TREE_CODE (gnu_type) == UNCONSTRAINED_ARRAY_TYPE
712 || (AGGREGATE_TYPE_P (gnu_type) && TYPE_BY_REFERENCE_P (gnu_type))
713 || (TYPE_SIZE (gnu_type)
714 && TREE_CODE (TYPE_SIZE (gnu_type)) != INTEGER_CST));
717 /* This function is called by the front end to enumerate all the supported
718 modes for the machine. We pass a function which is called back with
719 the following integer parameters:
721 FLOAT_P nonzero if this represents a floating-point mode
722 COMPLEX_P nonzero is this represents a complex mode
723 COUNT count of number of items, nonzero for vector mode
724 PRECISION number of bits in data representation
725 MANTISSA number of bits in mantissa, if FP and known, else zero.
726 SIZE number of bits used to store data
727 ALIGN number of bits to which mode is aligned. */
730 enumerate_modes (void (*f) (int, int, int, int, int, int, unsigned int))
734 for (i = 0; i < NUM_MACHINE_MODES; i++)
742 enum machine_mode inner_mode = i;
744 switch (GET_MODE_CLASS (i))
751 case MODE_COMPLEX_INT:
753 inner_mode = GET_MODE_INNER (i);
755 case MODE_COMPLEX_FLOAT:
758 inner_mode = GET_MODE_INNER (i);
760 case MODE_VECTOR_INT:
762 inner_mode = GET_MODE_INNER (i);
764 case MODE_VECTOR_FLOAT:
767 inner_mode = GET_MODE_INNER (i);
773 /* Skip this mode if it's one the front end doesn't need to know about
774 (e.g., the CC modes) or if there is no add insn for that mode (or
775 any wider mode), meaning it is not supported by the hardware. If
776 this a complex or vector mode, we care about the inner mode. */
777 for (j = inner_mode; j != VOIDmode; j = GET_MODE_WIDER_MODE (j))
778 if (optab_handler (add_optab, j)->insn_code != CODE_FOR_nothing)
783 const struct real_format *fmt = REAL_MODE_FORMAT (inner_mode);
788 if (!skip_p && j != VOIDmode)
789 (*f) (float_p, complex_p, vector_p ? GET_MODE_NUNITS (i) : 0,
790 GET_MODE_BITSIZE (i), mantissa,
791 GET_MODE_SIZE (i) * BITS_PER_UNIT, GET_MODE_ALIGNMENT (i));
795 /* Return the size of the FP mode with precision PREC. */
798 fp_prec_to_size (int prec)
800 enum machine_mode mode;
802 for (mode = GET_CLASS_NARROWEST_MODE (MODE_FLOAT); mode != VOIDmode;
803 mode = GET_MODE_WIDER_MODE (mode))
804 if (GET_MODE_PRECISION (mode) == prec)
805 return GET_MODE_BITSIZE (mode);
810 /* Return the precision of the FP mode with size SIZE. */
813 fp_size_to_prec (int size)
815 enum machine_mode mode;
817 for (mode = GET_CLASS_NARROWEST_MODE (MODE_FLOAT); mode != VOIDmode;
818 mode = GET_MODE_WIDER_MODE (mode))
819 if (GET_MODE_BITSIZE (mode) == size)
820 return GET_MODE_PRECISION (mode);