1 /* Name mangling for the 3.0 C++ ABI.
2 Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005
3 Free Software Foundation, Inc.
4 Written by Alex Samuel <samuel@codesourcery.com>
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it
9 under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GCC is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING. If not, write to the Free
20 Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
23 /* This file implements mangling of C++ names according to the IA64
24 C++ ABI specification. A mangled name encodes a function or
25 variable's name, scope, type, and/or template arguments into a text
26 identifier. This identifier is used as the function's or
27 variable's linkage name, to preserve compatibility between C++'s
28 language features (templates, scoping, and overloading) and C
31 Additionally, g++ uses mangled names internally. To support this,
32 mangling of types is allowed, even though the mangled name of a
33 type should not appear by itself as an exported name. Ditto for
34 uninstantiated templates.
36 The primary entry point for this module is mangle_decl, which
37 returns an identifier containing the mangled name for a decl.
38 Additional entry points are provided to build mangled names of
39 particular constructs when the appropriate decl for that construct
40 is not available. These are:
42 mangle_typeinfo_for_type: typeinfo data
43 mangle_typeinfo_string_for_type: typeinfo type name
44 mangle_vtbl_for_type: virtual table data
45 mangle_vtt_for_type: VTT data
46 mangle_ctor_vtbl_for_type: `C-in-B' constructor virtual table data
47 mangle_thunk: thunk function or entry */
51 #include "coretypes.h"
63 /* Debugging support. */
65 /* Define DEBUG_MANGLE to enable very verbose trace messages. */
67 #define DEBUG_MANGLE 0
70 /* Macros for tracing the write_* functions. */
72 # define MANGLE_TRACE(FN, INPUT) \
73 fprintf (stderr, " %-24s: %-24s\n", (FN), (INPUT))
74 # define MANGLE_TRACE_TREE(FN, NODE) \
75 fprintf (stderr, " %-24s: %-24s (%p)\n", \
76 (FN), tree_code_name[TREE_CODE (NODE)], (void *) (NODE))
78 # define MANGLE_TRACE(FN, INPUT)
79 # define MANGLE_TRACE_TREE(FN, NODE)
82 /* Nonzero if NODE is a class template-id. We can't rely on
83 CLASSTYPE_USE_TEMPLATE here because of tricky bugs in the parser
84 that hard to distinguish A<T> from A, where A<T> is the type as
85 instantiated outside of the template, and A is the type used
86 without parameters inside the template. */
87 #define CLASSTYPE_TEMPLATE_ID_P(NODE) \
88 (TYPE_LANG_SPECIFIC (NODE) != NULL \
89 && (TREE_CODE (NODE) == BOUND_TEMPLATE_TEMPLATE_PARM \
90 || (CLASSTYPE_TEMPLATE_INFO (NODE) != NULL \
91 && (PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (NODE))))))
93 /* Things we only need one of. This module is not reentrant. */
94 typedef struct globals GTY(())
96 /* An array of the current substitution candidates, in the order
98 VEC(tree,gc) *substitutions;
100 /* The entity that is being mangled. */
101 tree GTY ((skip)) entity;
103 /* True if the mangling will be different in a future version of the
105 bool need_abi_warning;
108 static GTY (()) globals G;
110 /* The obstack on which we build mangled names. */
111 static struct obstack *mangle_obstack;
113 /* The obstack on which we build mangled names that are not going to
114 be IDENTIFIER_NODEs. */
115 static struct obstack name_obstack;
117 /* The first object on the name_obstack; we use this to free memory
118 allocated on the name_obstack. */
119 static void *name_base;
121 /* An incomplete mangled name. There will be no NUL terminator. If
122 there is no incomplete mangled name, this variable is NULL. */
123 static char *partially_mangled_name;
125 /* The number of characters in the PARTIALLY_MANGLED_NAME. */
126 static size_t partially_mangled_name_len;
128 /* Indices into subst_identifiers. These are identifiers used in
129 special substitution rules. */
137 SUBID_BASIC_IOSTREAM,
140 substitution_identifier_index_t;
142 /* For quick substitution checks, look up these common identifiers
144 static GTY(()) tree subst_identifiers[SUBID_MAX];
146 /* Single-letter codes for builtin integer types, defined in
147 <builtin-type>. These are indexed by integer_type_kind values. */
149 integer_type_codes[itk_none] =
152 'a', /* itk_signed_char */
153 'h', /* itk_unsigned_char */
155 't', /* itk_unsigned_short */
157 'j', /* itk_unsigned_int */
159 'm', /* itk_unsigned_long */
160 'x', /* itk_long_long */
161 'y' /* itk_unsigned_long_long */
164 static int decl_is_template_id (const tree, tree* const);
166 /* Functions for handling substitutions. */
168 static inline tree canonicalize_for_substitution (tree);
169 static void add_substitution (tree);
170 static inline int is_std_substitution (const tree,
171 const substitution_identifier_index_t);
172 static inline int is_std_substitution_char (const tree,
173 const substitution_identifier_index_t);
174 static int find_substitution (tree);
175 static void mangle_call_offset (const tree, const tree);
177 /* Functions for emitting mangled representations of things. */
179 static void write_mangled_name (const tree, bool);
180 static void write_encoding (const tree);
181 static void write_name (tree, const int);
182 static void write_unscoped_name (const tree);
183 static void write_unscoped_template_name (const tree);
184 static void write_nested_name (const tree);
185 static void write_prefix (const tree);
186 static void write_template_prefix (const tree);
187 static void write_unqualified_name (const tree);
188 static void write_conversion_operator_name (const tree);
189 static void write_source_name (tree);
190 static int hwint_to_ascii (unsigned HOST_WIDE_INT, const unsigned int, char *,
192 static void write_number (unsigned HOST_WIDE_INT, const int,
194 static void write_integer_cst (const tree);
195 static void write_real_cst (const tree);
196 static void write_identifier (const char *);
197 static void write_special_name_constructor (const tree);
198 static void write_special_name_destructor (const tree);
199 static void write_type (tree);
200 static int write_CV_qualifiers_for_type (const tree);
201 static void write_builtin_type (tree);
202 static void write_function_type (const tree);
203 static void write_bare_function_type (const tree, const int, const tree);
204 static void write_method_parms (tree, const int, const tree);
205 static void write_class_enum_type (const tree);
206 static void write_template_args (tree);
207 static void write_expression (tree);
208 static void write_template_arg_literal (const tree);
209 static void write_template_arg (tree);
210 static void write_template_template_arg (const tree);
211 static void write_array_type (const tree);
212 static void write_pointer_to_member_type (const tree);
213 static void write_template_param (const tree);
214 static void write_template_template_param (const tree);
215 static void write_substitution (const int);
216 static int discriminator_for_local_entity (tree);
217 static int discriminator_for_string_literal (tree, tree);
218 static void write_discriminator (const int);
219 static void write_local_name (const tree, const tree, const tree);
220 static void dump_substitution_candidates (void);
221 static const char *mangle_decl_string (const tree);
223 /* Control functions. */
225 static inline void start_mangling (const tree, bool);
226 static inline const char *finish_mangling (const bool);
227 static tree mangle_special_for_type (const tree, const char *);
229 /* Foreign language functions. */
231 static void write_java_integer_type_codes (const tree);
233 /* Append a single character to the end of the mangled
235 #define write_char(CHAR) \
236 obstack_1grow (mangle_obstack, (CHAR))
238 /* Append a sized buffer to the end of the mangled representation. */
239 #define write_chars(CHAR, LEN) \
240 obstack_grow (mangle_obstack, (CHAR), (LEN))
242 /* Append a NUL-terminated string to the end of the mangled
244 #define write_string(STRING) \
245 obstack_grow (mangle_obstack, (STRING), strlen (STRING))
247 /* Nonzero if NODE1 and NODE2 are both TREE_LIST nodes and have the
248 same purpose (context, which may be a type) and value (template
249 decl). See write_template_prefix for more information on what this
251 #define NESTED_TEMPLATE_MATCH(NODE1, NODE2) \
252 (TREE_CODE (NODE1) == TREE_LIST \
253 && TREE_CODE (NODE2) == TREE_LIST \
254 && ((TYPE_P (TREE_PURPOSE (NODE1)) \
255 && same_type_p (TREE_PURPOSE (NODE1), TREE_PURPOSE (NODE2))) \
256 || TREE_PURPOSE (NODE1) == TREE_PURPOSE (NODE2)) \
257 && TREE_VALUE (NODE1) == TREE_VALUE (NODE2))
259 /* Write out an unsigned quantity in base 10. */
260 #define write_unsigned_number(NUMBER) \
261 write_number ((NUMBER), /*unsigned_p=*/1, 10)
263 /* Save the current (incomplete) mangled name and release the obstack
264 storage holding it. This function should be used during mangling
265 when making a call that could result in a call to get_identifier,
266 as such a call will clobber the same obstack being used for
267 mangling. This function may not be called twice without an
268 intervening call to restore_partially_mangled_name. */
271 save_partially_mangled_name (void)
273 if (mangle_obstack == &ident_hash->stack)
275 gcc_assert (!partially_mangled_name);
276 partially_mangled_name_len = obstack_object_size (mangle_obstack);
277 partially_mangled_name = XNEWVEC (char, partially_mangled_name_len);
278 memcpy (partially_mangled_name, obstack_base (mangle_obstack),
279 partially_mangled_name_len);
280 obstack_free (mangle_obstack, obstack_finish (mangle_obstack));
284 /* Restore the incomplete mangled name saved with
285 save_partially_mangled_name. */
288 restore_partially_mangled_name (void)
290 if (partially_mangled_name)
292 obstack_grow (mangle_obstack, partially_mangled_name,
293 partially_mangled_name_len);
294 free (partially_mangled_name);
295 partially_mangled_name = NULL;
299 /* If DECL is a template instance, return nonzero and, if
300 TEMPLATE_INFO is non-NULL, set *TEMPLATE_INFO to its template info.
301 Otherwise return zero. */
304 decl_is_template_id (const tree decl, tree* const template_info)
306 if (TREE_CODE (decl) == TYPE_DECL)
308 /* TYPE_DECLs are handled specially. Look at its type to decide
309 if this is a template instantiation. */
310 const tree type = TREE_TYPE (decl);
312 if (CLASS_TYPE_P (type) && CLASSTYPE_TEMPLATE_ID_P (type))
314 if (template_info != NULL)
315 /* For a templated TYPE_DECL, the template info is hanging
317 *template_info = TYPE_TEMPLATE_INFO (type);
323 /* Check if this is a primary template. */
324 if (DECL_LANG_SPECIFIC (decl) != NULL
325 && DECL_USE_TEMPLATE (decl)
326 && PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl))
327 && TREE_CODE (decl) != TEMPLATE_DECL)
329 if (template_info != NULL)
330 /* For most templated decls, the template info is hanging
332 *template_info = DECL_TEMPLATE_INFO (decl);
337 /* It's not a template id. */
341 /* Produce debugging output of current substitution candidates. */
344 dump_substitution_candidates (void)
349 fprintf (stderr, " ++ substitutions ");
350 for (i = 0; VEC_iterate (tree, G.substitutions, i, el); ++i)
352 const char *name = "???";
355 fprintf (stderr, " ");
357 name = IDENTIFIER_POINTER (DECL_NAME (el));
358 else if (TREE_CODE (el) == TREE_LIST)
359 name = IDENTIFIER_POINTER (DECL_NAME (TREE_VALUE (el)));
360 else if (TYPE_NAME (el))
361 name = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (el)));
362 fprintf (stderr, " S%d_ = ", i - 1);
364 (CP_TYPE_RESTRICT_P (el)
365 || CP_TYPE_VOLATILE_P (el)
366 || CP_TYPE_CONST_P (el)))
367 fprintf (stderr, "CV-");
368 fprintf (stderr, "%s (%s at %p)\n",
369 name, tree_code_name[TREE_CODE (el)], (void *) el);
373 /* Both decls and types can be substitution candidates, but sometimes
374 they refer to the same thing. For instance, a TYPE_DECL and
375 RECORD_TYPE for the same class refer to the same thing, and should
376 be treated accordingly in substitutions. This function returns a
377 canonicalized tree node representing NODE that is used when adding
378 and substitution candidates and finding matches. */
381 canonicalize_for_substitution (tree node)
383 /* For a TYPE_DECL, use the type instead. */
384 if (TREE_CODE (node) == TYPE_DECL)
385 node = TREE_TYPE (node);
387 node = canonical_type_variant (node);
392 /* Add NODE as a substitution candidate. NODE must not already be on
393 the list of candidates. */
396 add_substitution (tree node)
401 fprintf (stderr, " ++ add_substitution (%s at %10p)\n",
402 tree_code_name[TREE_CODE (node)], (void *) node);
404 /* Get the canonicalized substitution candidate for NODE. */
405 c = canonicalize_for_substitution (node);
406 if (DEBUG_MANGLE && c != node)
407 fprintf (stderr, " ++ using candidate (%s at %10p)\n",
408 tree_code_name[TREE_CODE (node)], (void *) node);
412 /* Make sure NODE isn't already a candidate. */
417 for (i = 0; VEC_iterate (tree, G.substitutions, i, candidate); i++)
419 gcc_assert (!(DECL_P (node) && node == candidate));
420 gcc_assert (!(TYPE_P (node) && TYPE_P (candidate)
421 && same_type_p (node, candidate)));
424 #endif /* ENABLE_CHECKING */
426 /* Put the decl onto the varray of substitution candidates. */
427 VEC_safe_push (tree, gc, G.substitutions, node);
430 dump_substitution_candidates ();
433 /* Helper function for find_substitution. Returns nonzero if NODE,
434 which may be a decl or a CLASS_TYPE, is a template-id with template
435 name of substitution_index[INDEX] in the ::std namespace. */
438 is_std_substitution (const tree node,
439 const substitution_identifier_index_t index)
446 type = TREE_TYPE (node);
449 else if (CLASS_TYPE_P (node))
452 decl = TYPE_NAME (node);
455 /* These are not the droids you're looking for. */
458 return (DECL_NAMESPACE_STD_P (CP_DECL_CONTEXT (decl))
459 && TYPE_LANG_SPECIFIC (type)
460 && TYPE_TEMPLATE_INFO (type)
461 && (DECL_NAME (TYPE_TI_TEMPLATE (type))
462 == subst_identifiers[index]));
465 /* Helper function for find_substitution. Returns nonzero if NODE,
466 which may be a decl or a CLASS_TYPE, is the template-id
467 ::std::identifier<char>, where identifier is
468 substitution_index[INDEX]. */
471 is_std_substitution_char (const tree node,
472 const substitution_identifier_index_t index)
475 /* Check NODE's name is ::std::identifier. */
476 if (!is_std_substitution (node, index))
478 /* Figure out its template args. */
480 args = DECL_TI_ARGS (node);
481 else if (CLASS_TYPE_P (node))
482 args = CLASSTYPE_TI_ARGS (node);
484 /* Oops, not a template. */
486 /* NODE's template arg list should be <char>. */
488 TREE_VEC_LENGTH (args) == 1
489 && TREE_VEC_ELT (args, 0) == char_type_node;
492 /* Check whether a substitution should be used to represent NODE in
495 First, check standard special-case substitutions.
497 <substitution> ::= St
504 # ::std::basic_string
507 # ::std::basic_string<char,
508 ::std::char_traits<char>,
509 ::std::allocator<char> >
512 # ::std::basic_istream<char, ::std::char_traits<char> >
515 # ::std::basic_ostream<char, ::std::char_traits<char> >
518 # ::std::basic_iostream<char, ::std::char_traits<char> >
520 Then examine the stack of currently available substitution
521 candidates for entities appearing earlier in the same mangling
523 If a substitution is found, write its mangled representation and
524 return nonzero. If none is found, just return zero. */
527 find_substitution (tree node)
530 const int size = VEC_length (tree, G.substitutions);
535 fprintf (stderr, " ++ find_substitution (%s at %p)\n",
536 tree_code_name[TREE_CODE (node)], (void *) node);
538 /* Obtain the canonicalized substitution representation for NODE.
539 This is what we'll compare against. */
540 node = canonicalize_for_substitution (node);
542 /* Check for builtin substitutions. */
544 decl = TYPE_P (node) ? TYPE_NAME (node) : node;
545 type = TYPE_P (node) ? node : TREE_TYPE (node);
547 /* Check for std::allocator. */
549 && is_std_substitution (decl, SUBID_ALLOCATOR)
550 && !CLASSTYPE_USE_TEMPLATE (TREE_TYPE (decl)))
556 /* Check for std::basic_string. */
557 if (decl && is_std_substitution (decl, SUBID_BASIC_STRING))
561 /* If this is a type (i.e. a fully-qualified template-id),
563 std::basic_string <char,
564 std::char_traits<char>,
565 std::allocator<char> > . */
566 if (cp_type_quals (type) == TYPE_UNQUALIFIED
567 && CLASSTYPE_USE_TEMPLATE (type))
569 tree args = CLASSTYPE_TI_ARGS (type);
570 if (TREE_VEC_LENGTH (args) == 3
571 && same_type_p (TREE_VEC_ELT (args, 0), char_type_node)
572 && is_std_substitution_char (TREE_VEC_ELT (args, 1),
574 && is_std_substitution_char (TREE_VEC_ELT (args, 2),
583 /* Substitute for the template name only if this isn't a type. */
590 /* Check for basic_{i,o,io}stream. */
592 && cp_type_quals (type) == TYPE_UNQUALIFIED
593 && CLASS_TYPE_P (type)
594 && CLASSTYPE_USE_TEMPLATE (type)
595 && CLASSTYPE_TEMPLATE_INFO (type) != NULL)
597 /* First, check for the template
598 args <char, std::char_traits<char> > . */
599 tree args = CLASSTYPE_TI_ARGS (type);
600 if (TREE_VEC_LENGTH (args) == 2
601 && TYPE_P (TREE_VEC_ELT (args, 0))
602 && same_type_p (TREE_VEC_ELT (args, 0), char_type_node)
603 && is_std_substitution_char (TREE_VEC_ELT (args, 1),
606 /* Got them. Is this basic_istream? */
607 if (is_std_substitution (decl, SUBID_BASIC_ISTREAM))
612 /* Or basic_ostream? */
613 else if (is_std_substitution (decl, SUBID_BASIC_OSTREAM))
618 /* Or basic_iostream? */
619 else if (is_std_substitution (decl, SUBID_BASIC_IOSTREAM))
627 /* Check for namespace std. */
628 if (decl && DECL_NAMESPACE_STD_P (decl))
634 /* Now check the list of available substitutions for this mangling
636 for (i = 0; i < size; ++i)
638 tree candidate = VEC_index (tree, G.substitutions, i);
639 /* NODE is a matched to a candidate if it's the same decl node or
640 if it's the same type. */
641 if (decl == candidate
642 || (TYPE_P (candidate) && type && TYPE_P (type)
643 && same_type_p (type, candidate))
644 || NESTED_TEMPLATE_MATCH (node, candidate))
646 write_substitution (i);
651 /* No substitution found. */
656 /* TOP_LEVEL is true, if this is being called at outermost level of
657 mangling. It should be false when mangling a decl appearing in an
658 expression within some other mangling.
660 <mangled-name> ::= _Z <encoding> */
663 write_mangled_name (const tree decl, bool top_level)
665 MANGLE_TRACE_TREE ("mangled-name", decl);
667 if (/* The names of `extern "C"' functions are not mangled. */
668 DECL_EXTERN_C_FUNCTION_P (decl)
669 /* But overloaded operator names *are* mangled. */
670 && !DECL_OVERLOADED_OPERATOR_P (decl))
675 write_string (IDENTIFIER_POINTER (DECL_NAME (decl)));
678 /* The standard notes: "The <encoding> of an extern "C"
679 function is treated like global-scope data, i.e. as its
680 <source-name> without a type." We cannot write
681 overloaded operators that way though, because it contains
682 characters invalid in assembler. */
683 if (abi_version_at_least (2))
686 G.need_abi_warning = true;
687 write_source_name (DECL_NAME (decl));
690 else if (TREE_CODE (decl) == VAR_DECL
691 /* The names of non-static global variables aren't mangled. */
692 && DECL_EXTERNAL_LINKAGE_P (decl)
693 && (CP_DECL_CONTEXT (decl) == global_namespace
694 /* And neither are `extern "C"' variables. */
695 || DECL_EXTERN_C_P (decl)))
697 if (top_level || abi_version_at_least (2))
701 G.need_abi_warning = true;
709 write_encoding (decl);
710 if (DECL_LANG_SPECIFIC (decl)
711 && (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P (decl)
712 || DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl)))
713 /* We need a distinct mangled name for these entities, but
714 we should never actually output it. So, we append some
715 characters the assembler won't like. */
716 write_string (" *INTERNAL* ");
720 /* <encoding> ::= <function name> <bare-function-type>
724 write_encoding (const tree decl)
726 MANGLE_TRACE_TREE ("encoding", decl);
728 if (DECL_LANG_SPECIFIC (decl) && DECL_EXTERN_C_FUNCTION_P (decl))
730 /* For overloaded operators write just the mangled name
731 without arguments. */
732 if (DECL_OVERLOADED_OPERATOR_P (decl))
733 write_name (decl, /*ignore_local_scope=*/0);
735 write_source_name (DECL_NAME (decl));
739 write_name (decl, /*ignore_local_scope=*/0);
740 if (TREE_CODE (decl) == FUNCTION_DECL)
745 if (decl_is_template_id (decl, NULL))
747 save_partially_mangled_name ();
748 fn_type = get_mostly_instantiated_function_type (decl);
749 restore_partially_mangled_name ();
750 /* FN_TYPE will not have parameter types for in-charge or
751 VTT parameters. Therefore, we pass NULL_TREE to
752 write_bare_function_type -- otherwise, it will get
753 confused about which artificial parameters to skip. */
758 fn_type = TREE_TYPE (decl);
762 write_bare_function_type (fn_type,
763 (!DECL_CONSTRUCTOR_P (decl)
764 && !DECL_DESTRUCTOR_P (decl)
765 && !DECL_CONV_FN_P (decl)
766 && decl_is_template_id (decl, NULL)),
771 /* <name> ::= <unscoped-name>
772 ::= <unscoped-template-name> <template-args>
776 If IGNORE_LOCAL_SCOPE is nonzero, this production of <name> is
777 called from <local-name>, which mangles the enclosing scope
778 elsewhere and then uses this function to mangle just the part
779 underneath the function scope. So don't use the <local-name>
780 production, to avoid an infinite recursion. */
783 write_name (tree decl, const int ignore_local_scope)
787 MANGLE_TRACE_TREE ("name", decl);
789 if (TREE_CODE (decl) == TYPE_DECL)
791 /* In case this is a typedef, fish out the corresponding
792 TYPE_DECL for the main variant. */
793 decl = TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl)));
794 context = TYPE_CONTEXT (TYPE_MAIN_VARIANT (TREE_TYPE (decl)));
797 context = (DECL_CONTEXT (decl) == NULL) ? NULL : CP_DECL_CONTEXT (decl);
799 /* A decl in :: or ::std scope is treated specially. The former is
800 mangled using <unscoped-name> or <unscoped-template-name>, the
801 latter with a special substitution. Also, a name that is
802 directly in a local function scope is also mangled with
803 <unscoped-name> rather than a full <nested-name>. */
805 || context == global_namespace
806 || DECL_NAMESPACE_STD_P (context)
807 || (ignore_local_scope && TREE_CODE (context) == FUNCTION_DECL))
810 /* Is this a template instance? */
811 if (decl_is_template_id (decl, &template_info))
813 /* Yes: use <unscoped-template-name>. */
814 write_unscoped_template_name (TI_TEMPLATE (template_info));
815 write_template_args (TI_ARGS (template_info));
818 /* Everything else gets an <unqualified-name>. */
819 write_unscoped_name (decl);
823 /* Handle local names, unless we asked not to (that is, invoked
824 under <local-name>, to handle only the part of the name under
826 if (!ignore_local_scope)
828 /* Scan up the list of scope context, looking for a
829 function. If we find one, this entity is in local
830 function scope. local_entity tracks context one scope
831 level down, so it will contain the element that's
832 directly in that function's scope, either decl or one of
833 its enclosing scopes. */
834 tree local_entity = decl;
835 while (context != NULL && context != global_namespace)
837 /* Make sure we're always dealing with decls. */
838 if (context != NULL && TYPE_P (context))
839 context = TYPE_NAME (context);
840 /* Is this a function? */
841 if (TREE_CODE (context) == FUNCTION_DECL)
843 /* Yes, we have local scope. Use the <local-name>
844 production for the innermost function scope. */
845 write_local_name (context, local_entity, decl);
848 /* Up one scope level. */
849 local_entity = context;
850 context = CP_DECL_CONTEXT (context);
853 /* No local scope found? Fall through to <nested-name>. */
856 /* Other decls get a <nested-name> to encode their scope. */
857 write_nested_name (decl);
861 /* <unscoped-name> ::= <unqualified-name>
862 ::= St <unqualified-name> # ::std:: */
865 write_unscoped_name (const tree decl)
867 tree context = CP_DECL_CONTEXT (decl);
869 MANGLE_TRACE_TREE ("unscoped-name", decl);
871 /* Is DECL in ::std? */
872 if (DECL_NAMESPACE_STD_P (context))
875 write_unqualified_name (decl);
879 /* If not, it should be either in the global namespace, or directly
880 in a local function scope. */
881 gcc_assert (context == global_namespace
883 || TREE_CODE (context) == FUNCTION_DECL);
885 write_unqualified_name (decl);
889 /* <unscoped-template-name> ::= <unscoped-name>
890 ::= <substitution> */
893 write_unscoped_template_name (const tree decl)
895 MANGLE_TRACE_TREE ("unscoped-template-name", decl);
897 if (find_substitution (decl))
899 write_unscoped_name (decl);
900 add_substitution (decl);
903 /* Write the nested name, including CV-qualifiers, of DECL.
905 <nested-name> ::= N [<CV-qualifiers>] <prefix> <unqualified-name> E
906 ::= N [<CV-qualifiers>] <template-prefix> <template-args> E
908 <CV-qualifiers> ::= [r] [V] [K] */
911 write_nested_name (const tree decl)
915 MANGLE_TRACE_TREE ("nested-name", decl);
919 /* Write CV-qualifiers, if this is a member function. */
920 if (TREE_CODE (decl) == FUNCTION_DECL
921 && DECL_NONSTATIC_MEMBER_FUNCTION_P (decl))
923 if (DECL_VOLATILE_MEMFUNC_P (decl))
925 if (DECL_CONST_MEMFUNC_P (decl))
929 /* Is this a template instance? */
930 if (decl_is_template_id (decl, &template_info))
932 /* Yes, use <template-prefix>. */
933 write_template_prefix (decl);
934 write_template_args (TI_ARGS (template_info));
938 /* No, just use <prefix> */
939 write_prefix (DECL_CONTEXT (decl));
940 write_unqualified_name (decl);
945 /* <prefix> ::= <prefix> <unqualified-name>
947 ::= <template-prefix> <template-args>
949 ::= <substitution> */
952 write_prefix (const tree node)
955 /* Non-NULL if NODE represents a template-id. */
956 tree template_info = NULL;
958 MANGLE_TRACE_TREE ("prefix", node);
961 || node == global_namespace)
964 if (find_substitution (node))
969 /* If this is a function decl, that means we've hit function
970 scope, so this prefix must be for a local name. In this
971 case, we're under the <local-name> production, which encodes
972 the enclosing function scope elsewhere. So don't continue
974 if (TREE_CODE (node) == FUNCTION_DECL)
978 decl_is_template_id (decl, &template_info);
982 /* Node is a type. */
983 decl = TYPE_NAME (node);
984 if (CLASSTYPE_TEMPLATE_ID_P (node))
985 template_info = TYPE_TEMPLATE_INFO (node);
988 /* In G++ 3.2, the name of the template parameter was used. */
989 if (TREE_CODE (node) == TEMPLATE_TYPE_PARM
990 && !abi_version_at_least (2))
991 G.need_abi_warning = true;
993 if (TREE_CODE (node) == TEMPLATE_TYPE_PARM
994 && abi_version_at_least (2))
995 write_template_param (node);
996 else if (template_info != NULL)
999 write_template_prefix (decl);
1000 write_template_args (TI_ARGS (template_info));
1003 /* Not templated. */
1005 write_prefix (CP_DECL_CONTEXT (decl));
1006 write_unqualified_name (decl);
1009 add_substitution (node);
1012 /* <template-prefix> ::= <prefix> <template component>
1013 ::= <template-param>
1014 ::= <substitution> */
1017 write_template_prefix (const tree node)
1019 tree decl = DECL_P (node) ? node : TYPE_NAME (node);
1020 tree type = DECL_P (node) ? TREE_TYPE (node) : node;
1021 tree context = CP_DECL_CONTEXT (decl);
1026 MANGLE_TRACE_TREE ("template-prefix", node);
1028 /* Find the template decl. */
1029 if (decl_is_template_id (decl, &template_info))
1030 template = TI_TEMPLATE (template_info);
1033 gcc_assert (CLASSTYPE_TEMPLATE_ID_P (type));
1035 template = TYPE_TI_TEMPLATE (type);
1038 /* For a member template, though, the template name for the
1039 innermost name must have all the outer template levels
1040 instantiated. For instance, consider
1042 template<typename T> struct Outer {
1043 template<typename U> struct Inner {};
1046 The template name for `Inner' in `Outer<int>::Inner<float>' is
1047 `Outer<int>::Inner<U>'. In g++, we don't instantiate the template
1048 levels separately, so there's no TEMPLATE_DECL available for this
1049 (there's only `Outer<T>::Inner<U>').
1051 In order to get the substitutions right, we create a special
1052 TREE_LIST to represent the substitution candidate for a nested
1053 template. The TREE_PURPOSE is the template's context, fully
1054 instantiated, and the TREE_VALUE is the TEMPLATE_DECL for the inner
1057 So, for the example above, `Outer<int>::Inner' is represented as a
1058 substitution candidate by a TREE_LIST whose purpose is `Outer<int>'
1059 and whose value is `Outer<T>::Inner<U>'. */
1060 if (TYPE_P (context))
1061 substitution = build_tree_list (context, template);
1063 substitution = template;
1065 if (find_substitution (substitution))
1068 /* In G++ 3.2, the name of the template template parameter was used. */
1069 if (TREE_CODE (TREE_TYPE (template)) == TEMPLATE_TEMPLATE_PARM
1070 && !abi_version_at_least (2))
1071 G.need_abi_warning = true;
1073 if (TREE_CODE (TREE_TYPE (template)) == TEMPLATE_TEMPLATE_PARM
1074 && abi_version_at_least (2))
1075 write_template_param (TREE_TYPE (template));
1078 write_prefix (context);
1079 write_unqualified_name (decl);
1082 add_substitution (substitution);
1085 /* We don't need to handle thunks, vtables, or VTTs here. Those are
1086 mangled through special entry points.
1088 <unqualified-name> ::= <operator-name>
1091 ::= <local-source-name>
1093 <local-source-name> ::= L <source-name> <discriminator> */
1096 write_unqualified_name (const tree decl)
1098 MANGLE_TRACE_TREE ("unqualified-name", decl);
1100 if (DECL_LANG_SPECIFIC (decl) != NULL && DECL_CONSTRUCTOR_P (decl))
1101 write_special_name_constructor (decl);
1102 else if (DECL_LANG_SPECIFIC (decl) != NULL && DECL_DESTRUCTOR_P (decl))
1103 write_special_name_destructor (decl);
1104 else if (DECL_NAME (decl) == NULL_TREE)
1105 write_source_name (DECL_ASSEMBLER_NAME (decl));
1106 else if (DECL_CONV_FN_P (decl))
1108 /* Conversion operator. Handle it right here.
1109 <operator> ::= cv <type> */
1111 if (decl_is_template_id (decl, NULL))
1114 save_partially_mangled_name ();
1115 fn_type = get_mostly_instantiated_function_type (decl);
1116 restore_partially_mangled_name ();
1117 type = TREE_TYPE (fn_type);
1120 type = DECL_CONV_FN_TYPE (decl);
1121 write_conversion_operator_name (type);
1123 else if (DECL_OVERLOADED_OPERATOR_P (decl))
1125 operator_name_info_t *oni;
1126 if (DECL_ASSIGNMENT_OPERATOR_P (decl))
1127 oni = assignment_operator_name_info;
1129 oni = operator_name_info;
1131 write_string (oni[DECL_OVERLOADED_OPERATOR_P (decl)].mangled_name);
1133 else if (VAR_OR_FUNCTION_DECL_P (decl) && ! TREE_PUBLIC (decl)
1134 && DECL_NAMESPACE_SCOPE_P (decl)
1135 && decl_linkage (decl) == lk_internal)
1137 MANGLE_TRACE_TREE ("local-source-name", decl);
1139 write_source_name (DECL_NAME (decl));
1140 /* The default discriminator is 1, and that's all we ever use,
1141 so there's no code to output one here. */
1144 write_source_name (DECL_NAME (decl));
1147 /* Write the unqualified-name for a conversion operator to TYPE. */
1150 write_conversion_operator_name (const tree type)
1152 write_string ("cv");
1156 /* Non-terminal <source-name>. IDENTIFIER is an IDENTIFIER_NODE.
1158 <source-name> ::= </length/ number> <identifier> */
1161 write_source_name (tree identifier)
1163 MANGLE_TRACE_TREE ("source-name", identifier);
1165 /* Never write the whole template-id name including the template
1166 arguments; we only want the template name. */
1167 if (IDENTIFIER_TEMPLATE (identifier))
1168 identifier = IDENTIFIER_TEMPLATE (identifier);
1170 write_unsigned_number (IDENTIFIER_LENGTH (identifier));
1171 write_identifier (IDENTIFIER_POINTER (identifier));
1174 /* Convert NUMBER to ascii using base BASE and generating at least
1175 MIN_DIGITS characters. BUFFER points to the _end_ of the buffer
1176 into which to store the characters. Returns the number of
1177 characters generated (these will be layed out in advance of where
1181 hwint_to_ascii (unsigned HOST_WIDE_INT number, const unsigned int base,
1182 char *buffer, const unsigned int min_digits)
1184 static const char base_digits[] = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
1185 unsigned digits = 0;
1189 unsigned HOST_WIDE_INT d = number / base;
1191 *--buffer = base_digits[number - d * base];
1195 while (digits < min_digits)
1197 *--buffer = base_digits[0];
1203 /* Non-terminal <number>.
1205 <number> ::= [n] </decimal integer/> */
1208 write_number (unsigned HOST_WIDE_INT number, const int unsigned_p,
1209 const unsigned int base)
1211 char buffer[sizeof (HOST_WIDE_INT) * 8];
1214 if (!unsigned_p && (HOST_WIDE_INT) number < 0)
1217 number = -((HOST_WIDE_INT) number);
1219 count = hwint_to_ascii (number, base, buffer + sizeof (buffer), 1);
1220 write_chars (buffer + sizeof (buffer) - count, count);
1223 /* Write out an integral CST in decimal. Most numbers are small, and
1224 representable in a HOST_WIDE_INT. Occasionally we'll have numbers
1225 bigger than that, which we must deal with. */
1228 write_integer_cst (const tree cst)
1230 int sign = tree_int_cst_sgn (cst);
1232 if (TREE_INT_CST_HIGH (cst) + (sign < 0))
1234 /* A bignum. We do this in chunks, each of which fits in a
1236 char buffer[sizeof (HOST_WIDE_INT) * 8 * 2];
1237 unsigned HOST_WIDE_INT chunk;
1238 unsigned chunk_digits;
1239 char *ptr = buffer + sizeof (buffer);
1244 /* HOST_WIDE_INT must be at least 32 bits, so 10^9 is
1249 if (sizeof (HOST_WIDE_INT) >= 8)
1251 /* It is at least 64 bits, so 10^18 is representable. */
1256 type = c_common_signed_or_unsigned_type (1, TREE_TYPE (cst));
1257 base = build_int_cstu (type, chunk);
1258 n = build_int_cst_wide (type,
1259 TREE_INT_CST_LOW (cst), TREE_INT_CST_HIGH (cst));
1264 n = fold_build1 (NEGATE_EXPR, type, n);
1268 tree d = fold_build2 (FLOOR_DIV_EXPR, type, n, base);
1269 tree tmp = fold_build2 (MULT_EXPR, type, d, base);
1272 done = integer_zerop (d);
1273 tmp = fold_build2 (MINUS_EXPR, type, n, tmp);
1274 c = hwint_to_ascii (TREE_INT_CST_LOW (tmp), 10, ptr,
1275 done ? 1 : chunk_digits);
1281 write_chars (ptr, count);
1286 unsigned HOST_WIDE_INT low = TREE_INT_CST_LOW (cst);
1293 write_unsigned_number (low);
1297 /* Write out a floating-point literal.
1299 "Floating-point literals are encoded using the bit pattern of the
1300 target processor's internal representation of that number, as a
1301 fixed-length lowercase hexadecimal string, high-order bytes first
1302 (even if the target processor would store low-order bytes first).
1303 The "n" prefix is not used for floating-point literals; the sign
1304 bit is encoded with the rest of the number.
1306 Here are some examples, assuming the IEEE standard representation
1307 for floating point numbers. (Spaces are for readability, not
1308 part of the encoding.)
1311 -1.0f Lf bf80 0000 E
1312 1.17549435e-38f Lf 0080 0000 E
1313 1.40129846e-45f Lf 0000 0001 E
1314 0.0f Lf 0000 0000 E"
1316 Caller is responsible for the Lx and the E. */
1318 write_real_cst (const tree value)
1320 if (abi_version_at_least (2))
1322 long target_real[4]; /* largest supported float */
1323 char buffer[9]; /* eight hex digits in a 32-bit number */
1326 tree type = TREE_TYPE (value);
1327 int words = GET_MODE_BITSIZE (TYPE_MODE (type)) / 32;
1329 real_to_target (target_real, &TREE_REAL_CST (value),
1332 /* The value in target_real is in the target word order,
1333 so we must write it out backward if that happens to be
1334 little-endian. write_number cannot be used, it will
1335 produce uppercase. */
1336 if (FLOAT_WORDS_BIG_ENDIAN)
1337 i = 0, limit = words, dir = 1;
1339 i = words - 1, limit = -1, dir = -1;
1341 for (; i != limit; i += dir)
1343 sprintf (buffer, "%08lx", (unsigned long) target_real[i]);
1344 write_chars (buffer, 8);
1349 /* In G++ 3.3 and before the REAL_VALUE_TYPE was written out
1350 literally. Note that compatibility with 3.2 is impossible,
1351 because the old floating-point emulator used a different
1352 format for REAL_VALUE_TYPE. */
1354 for (i = 0; i < sizeof (TREE_REAL_CST (value)); ++i)
1355 write_number (((unsigned char *) &TREE_REAL_CST (value))[i],
1358 G.need_abi_warning = 1;
1362 /* Non-terminal <identifier>.
1364 <identifier> ::= </unqualified source code identifier> */
1367 write_identifier (const char *identifier)
1369 MANGLE_TRACE ("identifier", identifier);
1370 write_string (identifier);
1373 /* Handle constructor productions of non-terminal <special-name>.
1374 CTOR is a constructor FUNCTION_DECL.
1376 <special-name> ::= C1 # complete object constructor
1377 ::= C2 # base object constructor
1378 ::= C3 # complete object allocating constructor
1380 Currently, allocating constructors are never used.
1382 We also need to provide mangled names for the maybe-in-charge
1383 constructor, so we treat it here too. mangle_decl_string will
1384 append *INTERNAL* to that, to make sure we never emit it. */
1387 write_special_name_constructor (const tree ctor)
1389 if (DECL_BASE_CONSTRUCTOR_P (ctor))
1390 write_string ("C2");
1393 gcc_assert (DECL_COMPLETE_CONSTRUCTOR_P (ctor)
1394 /* Even though we don't ever emit a definition of
1395 the old-style destructor, we still have to
1396 consider entities (like static variables) nested
1398 || DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (ctor));
1399 write_string ("C1");
1403 /* Handle destructor productions of non-terminal <special-name>.
1404 DTOR is a destructor FUNCTION_DECL.
1406 <special-name> ::= D0 # deleting (in-charge) destructor
1407 ::= D1 # complete object (in-charge) destructor
1408 ::= D2 # base object (not-in-charge) destructor
1410 We also need to provide mangled names for the maybe-incharge
1411 destructor, so we treat it here too. mangle_decl_string will
1412 append *INTERNAL* to that, to make sure we never emit it. */
1415 write_special_name_destructor (const tree dtor)
1417 if (DECL_DELETING_DESTRUCTOR_P (dtor))
1418 write_string ("D0");
1419 else if (DECL_BASE_DESTRUCTOR_P (dtor))
1420 write_string ("D2");
1423 gcc_assert (DECL_COMPLETE_DESTRUCTOR_P (dtor)
1424 /* Even though we don't ever emit a definition of
1425 the old-style destructor, we still have to
1426 consider entities (like static variables) nested
1428 || DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P (dtor));
1429 write_string ("D1");
1433 /* Return the discriminator for ENTITY appearing inside
1434 FUNCTION. The discriminator is the lexical ordinal of VAR among
1435 entities with the same name in the same FUNCTION. */
1438 discriminator_for_local_entity (tree entity)
1440 /* Assume this is the only local entity with this name. */
1441 int discriminator = 0;
1443 if (DECL_DISCRIMINATOR_P (entity) && DECL_LANG_SPECIFIC (entity))
1444 discriminator = DECL_DISCRIMINATOR (entity);
1445 else if (TREE_CODE (entity) == TYPE_DECL)
1449 /* Scan the list of local classes. */
1450 entity = TREE_TYPE (entity);
1451 for (ix = 0; ; ix++)
1453 tree type = VEC_index (tree, local_classes, ix);
1456 if (TYPE_IDENTIFIER (type) == TYPE_IDENTIFIER (entity)
1457 && TYPE_CONTEXT (type) == TYPE_CONTEXT (entity))
1462 return discriminator;
1465 /* Return the discriminator for STRING, a string literal used inside
1466 FUNCTION. The discriminator is the lexical ordinal of STRING among
1467 string literals used in FUNCTION. */
1470 discriminator_for_string_literal (tree function ATTRIBUTE_UNUSED,
1471 tree string ATTRIBUTE_UNUSED)
1473 /* For now, we don't discriminate amongst string literals. */
1477 /* <discriminator> := _ <number>
1479 The discriminator is used only for the second and later occurrences
1480 of the same name within a single function. In this case <number> is
1481 n - 2, if this is the nth occurrence, in lexical order. */
1484 write_discriminator (const int discriminator)
1486 /* If discriminator is zero, don't write anything. Otherwise... */
1487 if (discriminator > 0)
1490 write_unsigned_number (discriminator - 1);
1494 /* Mangle the name of a function-scope entity. FUNCTION is the
1495 FUNCTION_DECL for the enclosing function. ENTITY is the decl for
1496 the entity itself. LOCAL_ENTITY is the entity that's directly
1497 scoped in FUNCTION_DECL, either ENTITY itself or an enclosing scope
1500 <local-name> := Z <function encoding> E <entity name> [<discriminator>]
1501 := Z <function encoding> E s [<discriminator>] */
1504 write_local_name (const tree function, const tree local_entity,
1507 MANGLE_TRACE_TREE ("local-name", entity);
1510 write_encoding (function);
1512 if (TREE_CODE (entity) == STRING_CST)
1515 write_discriminator (discriminator_for_string_literal (function,
1520 /* Now the <entity name>. Let write_name know its being called
1521 from <local-name>, so it doesn't try to process the enclosing
1522 function scope again. */
1523 write_name (entity, /*ignore_local_scope=*/1);
1524 write_discriminator (discriminator_for_local_entity (local_entity));
1528 /* Non-terminals <type> and <CV-qualifier>.
1530 <type> ::= <builtin-type>
1532 ::= <class-enum-type>
1534 ::= <pointer-to-member-type>
1535 ::= <template-param>
1538 ::= P <type> # pointer-to
1539 ::= R <type> # reference-to
1540 ::= C <type> # complex pair (C 2000)
1541 ::= G <type> # imaginary (C 2000) [not supported]
1542 ::= U <source-name> <type> # vendor extended type qualifier
1544 TYPE is a type node. */
1547 write_type (tree type)
1549 /* This gets set to nonzero if TYPE turns out to be a (possibly
1550 CV-qualified) builtin type. */
1551 int is_builtin_type = 0;
1553 MANGLE_TRACE_TREE ("type", type);
1555 if (type == error_mark_node)
1558 if (find_substitution (type))
1561 if (write_CV_qualifiers_for_type (type) > 0)
1562 /* If TYPE was CV-qualified, we just wrote the qualifiers; now
1563 mangle the unqualified type. The recursive call is needed here
1564 since both the qualified and unqualified types are substitution
1566 write_type (TYPE_MAIN_VARIANT (type));
1567 else if (TREE_CODE (type) == ARRAY_TYPE)
1568 /* It is important not to use the TYPE_MAIN_VARIANT of TYPE here
1569 so that the cv-qualification of the element type is available
1570 in write_array_type. */
1571 write_array_type (type);
1574 /* See through any typedefs. */
1575 type = TYPE_MAIN_VARIANT (type);
1577 if (TYPE_PTRMEM_P (type))
1578 write_pointer_to_member_type (type);
1579 else switch (TREE_CODE (type))
1583 case INTEGER_TYPE: /* Includes wchar_t. */
1586 /* Handle any target-specific fundamental types. */
1587 const char *target_mangling
1588 = targetm.mangle_fundamental_type (type);
1590 if (target_mangling)
1592 write_string (target_mangling);
1596 /* If this is a typedef, TYPE may not be one of
1597 the standard builtin type nodes, but an alias of one. Use
1598 TYPE_MAIN_VARIANT to get to the underlying builtin type. */
1599 write_builtin_type (TYPE_MAIN_VARIANT (type));
1606 write_type (TREE_TYPE (type));
1611 write_function_type (type);
1617 /* A pointer-to-member function is represented as a special
1618 RECORD_TYPE, so check for this first. */
1619 if (TYPE_PTRMEMFUNC_P (type))
1620 write_pointer_to_member_type (type);
1622 write_class_enum_type (type);
1626 case UNBOUND_CLASS_TEMPLATE:
1627 /* We handle TYPENAME_TYPEs and UNBOUND_CLASS_TEMPLATEs like
1628 ordinary nested names. */
1629 write_nested_name (TYPE_STUB_DECL (type));
1634 write_type (TREE_TYPE (type));
1637 case REFERENCE_TYPE:
1639 write_type (TREE_TYPE (type));
1642 case TEMPLATE_TYPE_PARM:
1643 case TEMPLATE_PARM_INDEX:
1644 write_template_param (type);
1647 case TEMPLATE_TEMPLATE_PARM:
1648 write_template_template_param (type);
1651 case BOUND_TEMPLATE_TEMPLATE_PARM:
1652 write_template_template_param (type);
1654 (TI_ARGS (TEMPLATE_TEMPLATE_PARM_TEMPLATE_INFO (type)));
1658 write_string ("U8__vector");
1659 write_type (TREE_TYPE (type));
1667 /* Types other than builtin types are substitution candidates. */
1668 if (!is_builtin_type)
1669 add_substitution (type);
1672 /* Non-terminal <CV-qualifiers> for type nodes. Returns the number of
1673 CV-qualifiers written for TYPE.
1675 <CV-qualifiers> ::= [r] [V] [K] */
1678 write_CV_qualifiers_for_type (const tree type)
1680 int num_qualifiers = 0;
1682 /* The order is specified by:
1684 "In cases where multiple order-insensitive qualifiers are
1685 present, they should be ordered 'K' (closest to the base type),
1686 'V', 'r', and 'U' (farthest from the base type) ..."
1688 Note that we do not use cp_type_quals below; given "const
1689 int[3]", the "const" is emitted with the "int", not with the
1692 if (TYPE_QUALS (type) & TYPE_QUAL_RESTRICT)
1697 if (TYPE_QUALS (type) & TYPE_QUAL_VOLATILE)
1702 if (TYPE_QUALS (type) & TYPE_QUAL_CONST)
1708 return num_qualifiers;
1711 /* Non-terminal <builtin-type>.
1713 <builtin-type> ::= v # void
1718 ::= h # unsigned char
1720 ::= t # unsigned short
1722 ::= j # unsigned int
1724 ::= m # unsigned long
1725 ::= x # long long, __int64
1726 ::= y # unsigned long long, __int64
1728 ::= o # unsigned __int128
1731 ::= e # long double, __float80
1732 ::= g # __float128 [not supported]
1733 ::= u <source-name> # vendor extended type */
1736 write_builtin_type (tree type)
1738 switch (TREE_CODE (type))
1749 /* If this is size_t, get the underlying int type. */
1750 if (TYPE_IS_SIZETYPE (type))
1751 type = TYPE_DOMAIN (type);
1753 /* TYPE may still be wchar_t, since that isn't in
1754 integer_type_nodes. */
1755 if (type == wchar_type_node)
1757 else if (TYPE_FOR_JAVA (type))
1758 write_java_integer_type_codes (type);
1762 /* Assume TYPE is one of the shared integer type nodes. Find
1763 it in the array of these nodes. */
1765 for (itk = 0; itk < itk_none; ++itk)
1766 if (type == integer_types[itk])
1768 /* Print the corresponding single-letter code. */
1769 write_char (integer_type_codes[itk]);
1773 if (itk == itk_none)
1775 tree t = c_common_type_for_mode (TYPE_MODE (type),
1776 TYPE_UNSIGNED (type));
1783 if (TYPE_PRECISION (type) == 128)
1784 write_char (TYPE_UNSIGNED (type) ? 'o' : 'n');
1787 /* Allow for cases where TYPE is not one of the shared
1788 integer type nodes and write a "vendor extended builtin
1789 type" with a name the form intN or uintN, respectively.
1790 Situations like this can happen if you have an
1791 __attribute__((__mode__(__SI__))) type and use exotic
1792 switches like '-mint8' on AVR. Of course, this is
1793 undefined by the C++ ABI (and '-mint8' is not even
1794 Standard C conforming), but when using such special
1795 options you're pretty much in nowhere land anyway. */
1797 char prec[11]; /* up to ten digits for an unsigned */
1799 prefix = TYPE_UNSIGNED (type) ? "uint" : "int";
1800 sprintf (prec, "%u", (unsigned) TYPE_PRECISION (type));
1801 write_char ('u'); /* "vendor extended builtin type" */
1802 write_unsigned_number (strlen (prefix) + strlen (prec));
1803 write_string (prefix);
1804 write_string (prec);
1811 if (type == float_type_node
1812 || type == java_float_type_node)
1814 else if (type == double_type_node
1815 || type == java_double_type_node)
1817 else if (type == long_double_type_node)
1828 /* Non-terminal <function-type>. NODE is a FUNCTION_TYPE or
1829 METHOD_TYPE. The return type is mangled before the parameter
1832 <function-type> ::= F [Y] <bare-function-type> E */
1835 write_function_type (const tree type)
1837 MANGLE_TRACE_TREE ("function-type", type);
1839 /* For a pointer to member function, the function type may have
1840 cv-qualifiers, indicating the quals for the artificial 'this'
1842 if (TREE_CODE (type) == METHOD_TYPE)
1844 /* The first parameter must be a POINTER_TYPE pointing to the
1845 `this' parameter. */
1846 tree this_type = TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (type)));
1847 write_CV_qualifiers_for_type (this_type);
1851 /* We don't track whether or not a type is `extern "C"'. Note that
1852 you can have an `extern "C"' function that does not have
1853 `extern "C"' type, and vice versa:
1855 extern "C" typedef void function_t();
1856 function_t f; // f has C++ linkage, but its type is
1859 typedef void function_t();
1860 extern "C" function_t f; // Vice versa.
1863 write_bare_function_type (type, /*include_return_type_p=*/1,
1868 /* Non-terminal <bare-function-type>. TYPE is a FUNCTION_TYPE or
1869 METHOD_TYPE. If INCLUDE_RETURN_TYPE is nonzero, the return value
1870 is mangled before the parameter types. If non-NULL, DECL is
1871 FUNCTION_DECL for the function whose type is being emitted.
1873 If DECL is a member of a Java type, then a literal 'J'
1874 is output and the return type is mangled as if INCLUDE_RETURN_TYPE
1877 <bare-function-type> ::= [J]</signature/ type>+ */
1880 write_bare_function_type (const tree type, const int include_return_type_p,
1885 MANGLE_TRACE_TREE ("bare-function-type", type);
1887 /* Detect Java methods and emit special encoding. */
1889 && DECL_FUNCTION_MEMBER_P (decl)
1890 && TYPE_FOR_JAVA (DECL_CONTEXT (decl))
1891 && !DECL_CONSTRUCTOR_P (decl)
1892 && !DECL_DESTRUCTOR_P (decl)
1893 && !DECL_CONV_FN_P (decl))
1903 /* Mangle the return type, if requested. */
1904 if (include_return_type_p || java_method_p)
1905 write_type (TREE_TYPE (type));
1907 /* Now mangle the types of the arguments. */
1908 write_method_parms (TYPE_ARG_TYPES (type),
1909 TREE_CODE (type) == METHOD_TYPE,
1913 /* Write the mangled representation of a method parameter list of
1914 types given in PARM_TYPES. If METHOD_P is nonzero, the function is
1915 considered a non-static method, and the this parameter is omitted.
1916 If non-NULL, DECL is the FUNCTION_DECL for the function whose
1917 parameters are being emitted. */
1920 write_method_parms (tree parm_types, const int method_p, const tree decl)
1922 tree first_parm_type;
1923 tree parm_decl = decl ? DECL_ARGUMENTS (decl) : NULL_TREE;
1925 /* Assume this parameter type list is variable-length. If it ends
1926 with a void type, then it's not. */
1929 /* If this is a member function, skip the first arg, which is the
1931 "Member functions do not encode the type of their implicit this
1934 Similarly, there's no need to mangle artificial parameters, like
1935 the VTT parameters for constructors and destructors. */
1938 parm_types = TREE_CHAIN (parm_types);
1939 parm_decl = parm_decl ? TREE_CHAIN (parm_decl) : NULL_TREE;
1941 while (parm_decl && DECL_ARTIFICIAL (parm_decl))
1943 parm_types = TREE_CHAIN (parm_types);
1944 parm_decl = TREE_CHAIN (parm_decl);
1948 for (first_parm_type = parm_types;
1950 parm_types = TREE_CHAIN (parm_types))
1952 tree parm = TREE_VALUE (parm_types);
1953 if (parm == void_type_node)
1955 /* "Empty parameter lists, whether declared as () or
1956 conventionally as (void), are encoded with a void parameter
1958 if (parm_types == first_parm_type)
1960 /* If the parm list is terminated with a void type, it's
1963 /* A void type better be the last one. */
1964 gcc_assert (TREE_CHAIN (parm_types) == NULL);
1971 /* <builtin-type> ::= z # ellipsis */
1975 /* <class-enum-type> ::= <name> */
1978 write_class_enum_type (const tree type)
1980 write_name (TYPE_NAME (type), /*ignore_local_scope=*/0);
1983 /* Non-terminal <template-args>. ARGS is a TREE_VEC of template
1986 <template-args> ::= I <template-arg>+ E */
1989 write_template_args (tree args)
1992 int length = TREE_VEC_LENGTH (args);
1994 MANGLE_TRACE_TREE ("template-args", args);
1998 gcc_assert (length > 0);
2000 if (TREE_CODE (TREE_VEC_ELT (args, 0)) == TREE_VEC)
2002 /* We have nested template args. We want the innermost template
2004 args = TREE_VEC_ELT (args, length - 1);
2005 length = TREE_VEC_LENGTH (args);
2007 for (i = 0; i < length; ++i)
2008 write_template_arg (TREE_VEC_ELT (args, i));
2013 /* <expression> ::= <unary operator-name> <expression>
2014 ::= <binary operator-name> <expression> <expression>
2017 <expr-primary> ::= <template-param>
2018 ::= L <type> <value number> E # literal
2019 ::= L <mangled-name> E # external name
2020 ::= sr <type> <unqualified-name>
2021 ::= sr <type> <unqualified-name> <template-args> */
2024 write_expression (tree expr)
2026 enum tree_code code;
2028 code = TREE_CODE (expr);
2030 /* Skip NOP_EXPRs. They can occur when (say) a pointer argument
2031 is converted (via qualification conversions) to another
2033 while (TREE_CODE (expr) == NOP_EXPR
2034 || TREE_CODE (expr) == NON_LVALUE_EXPR)
2036 expr = TREE_OPERAND (expr, 0);
2037 code = TREE_CODE (expr);
2040 if (code == BASELINK)
2042 expr = BASELINK_FUNCTIONS (expr);
2043 code = TREE_CODE (expr);
2046 /* Handle pointers-to-members by making them look like expression
2048 if (code == PTRMEM_CST)
2050 expr = build_nt (ADDR_EXPR,
2051 build_qualified_name (/*type=*/NULL_TREE,
2052 PTRMEM_CST_CLASS (expr),
2053 PTRMEM_CST_MEMBER (expr),
2054 /*template_p=*/false));
2055 code = TREE_CODE (expr);
2058 /* Handle template parameters. */
2059 if (code == TEMPLATE_TYPE_PARM
2060 || code == TEMPLATE_TEMPLATE_PARM
2061 || code == BOUND_TEMPLATE_TEMPLATE_PARM
2062 || code == TEMPLATE_PARM_INDEX)
2063 write_template_param (expr);
2064 /* Handle literals. */
2065 else if (TREE_CODE_CLASS (code) == tcc_constant
2066 || (abi_version_at_least (2) && code == CONST_DECL))
2067 write_template_arg_literal (expr);
2068 else if (DECL_P (expr))
2070 /* G++ 3.2 incorrectly mangled non-type template arguments of
2071 enumeration type using their names. */
2072 if (code == CONST_DECL)
2073 G.need_abi_warning = 1;
2075 write_mangled_name (expr, false);
2078 else if (TREE_CODE (expr) == SIZEOF_EXPR
2079 && TYPE_P (TREE_OPERAND (expr, 0)))
2081 write_string ("st");
2082 write_type (TREE_OPERAND (expr, 0));
2084 else if (abi_version_at_least (2) && TREE_CODE (expr) == SCOPE_REF)
2086 tree scope = TREE_OPERAND (expr, 0);
2087 tree member = TREE_OPERAND (expr, 1);
2089 /* If the MEMBER is a real declaration, then the qualifying
2090 scope was not dependent. Ideally, we would not have a
2091 SCOPE_REF in those cases, but sometimes we do. If the second
2092 argument is a DECL, then the name must not have been
2094 if (DECL_P (member))
2095 write_expression (member);
2100 write_string ("sr");
2102 /* If MEMBER is a template-id, separate the template
2103 from the arguments. */
2104 if (TREE_CODE (member) == TEMPLATE_ID_EXPR)
2106 template_args = TREE_OPERAND (member, 1);
2107 member = TREE_OPERAND (member, 0);
2110 template_args = NULL_TREE;
2111 /* Write out the name of the MEMBER. */
2112 if (IDENTIFIER_TYPENAME_P (member))
2113 write_conversion_operator_name (TREE_TYPE (member));
2114 else if (IDENTIFIER_OPNAME_P (member))
2117 const char *mangled_name = NULL;
2119 /* Unfortunately, there is no easy way to go from the
2120 name of the operator back to the corresponding tree
2122 for (i = 0; i < LAST_CPLUS_TREE_CODE; ++i)
2123 if (operator_name_info[i].identifier == member)
2125 /* The ABI says that we prefer binary operator
2126 names to unary operator names. */
2127 if (operator_name_info[i].arity == 2)
2129 mangled_name = operator_name_info[i].mangled_name;
2132 else if (!mangled_name)
2133 mangled_name = operator_name_info[i].mangled_name;
2135 else if (assignment_operator_name_info[i].identifier
2139 = assignment_operator_name_info[i].mangled_name;
2142 write_string (mangled_name);
2145 write_source_name (member);
2146 /* Write out the template arguments. */
2148 write_template_args (template_args);
2155 /* When we bind a variable or function to a non-type template
2156 argument with reference type, we create an ADDR_EXPR to show
2157 the fact that the entity's address has been taken. But, we
2158 don't actually want to output a mangling code for the `&'. */
2159 if (TREE_CODE (expr) == ADDR_EXPR
2161 && TREE_CODE (TREE_TYPE (expr)) == REFERENCE_TYPE)
2163 expr = TREE_OPERAND (expr, 0);
2166 write_expression (expr);
2170 code = TREE_CODE (expr);
2173 /* If it wasn't any of those, recursively expand the expression. */
2174 write_string (operator_name_info[(int) code].mangled_name);
2179 sorry ("call_expr cannot be mangled due to a defect in the C++ ABI");
2183 write_type (TREE_TYPE (expr));
2184 /* There is no way to mangle a zero-operand cast like
2186 if (!TREE_OPERAND (expr, 0))
2187 sorry ("zero-operand casts cannot be mangled due to a defect "
2190 write_expression (TREE_VALUE (TREE_OPERAND (expr, 0)));
2193 case STATIC_CAST_EXPR:
2194 case CONST_CAST_EXPR:
2195 write_type (TREE_TYPE (expr));
2196 write_expression (TREE_OPERAND (expr, 0));
2200 /* Handle pointers-to-members specially. */
2202 write_type (TREE_OPERAND (expr, 0));
2203 if (TREE_CODE (TREE_OPERAND (expr, 1)) == IDENTIFIER_NODE)
2204 write_source_name (TREE_OPERAND (expr, 1));
2205 else if (TREE_CODE (TREE_OPERAND (expr, 1)) == TEMPLATE_ID_EXPR)
2210 template_id = TREE_OPERAND (expr, 1);
2211 name = TREE_OPERAND (template_id, 0);
2212 /* FIXME: What about operators? */
2213 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
2214 write_source_name (TREE_OPERAND (template_id, 0));
2215 write_template_args (TREE_OPERAND (template_id, 1));
2219 /* G++ 3.2 incorrectly put out both the "sr" code and
2220 the nested name of the qualified name. */
2221 G.need_abi_warning = 1;
2222 write_encoding (TREE_OPERAND (expr, 1));
2227 for (i = 0; i < TREE_CODE_LENGTH (code); ++i)
2229 tree operand = TREE_OPERAND (expr, i);
2230 /* As a GNU extension, the middle operand of a
2231 conditional may be omitted. Since expression
2232 manglings are supposed to represent the input token
2233 stream, there's no good way to mangle such an
2234 expression without extending the C++ ABI. */
2235 if (code == COND_EXPR && i == 1 && !operand)
2237 error ("omitted middle operand to %<?:%> operand "
2238 "cannot be mangled");
2241 write_expression (operand);
2247 /* Literal subcase of non-terminal <template-arg>.
2249 "Literal arguments, e.g. "A<42L>", are encoded with their type
2250 and value. Negative integer values are preceded with "n"; for
2251 example, "A<-42L>" becomes "1AILln42EE". The bool value false is
2252 encoded as 0, true as 1." */
2255 write_template_arg_literal (const tree value)
2258 write_type (TREE_TYPE (value));
2260 switch (TREE_CODE (value))
2263 write_integer_cst (DECL_INITIAL (value));
2267 gcc_assert (!same_type_p (TREE_TYPE (value), boolean_type_node)
2268 || integer_zerop (value) || integer_onep (value));
2269 write_integer_cst (value);
2273 write_real_cst (value);
2283 /* Non-terminal <template-arg>.
2285 <template-arg> ::= <type> # type
2286 ::= L <type> </value/ number> E # literal
2287 ::= LZ <name> E # external name
2288 ::= X <expression> E # expression */
2291 write_template_arg (tree node)
2293 enum tree_code code = TREE_CODE (node);
2295 MANGLE_TRACE_TREE ("template-arg", node);
2297 /* A template template parameter's argument list contains TREE_LIST
2298 nodes of which the value field is the actual argument. */
2299 if (code == TREE_LIST)
2301 node = TREE_VALUE (node);
2302 /* If it's a decl, deal with its type instead. */
2305 node = TREE_TYPE (node);
2306 code = TREE_CODE (node);
2310 if (TREE_CODE (node) == NOP_EXPR
2311 && TREE_CODE (TREE_TYPE (node)) == REFERENCE_TYPE)
2313 /* Template parameters can be of reference type. To maintain
2314 internal consistency, such arguments use a conversion from
2315 address of object to reference type. */
2316 gcc_assert (TREE_CODE (TREE_OPERAND (node, 0)) == ADDR_EXPR);
2317 if (abi_version_at_least (2))
2318 node = TREE_OPERAND (TREE_OPERAND (node, 0), 0);
2320 G.need_abi_warning = 1;
2325 else if (code == TEMPLATE_DECL)
2326 /* A template appearing as a template arg is a template template arg. */
2327 write_template_template_arg (node);
2328 else if ((TREE_CODE_CLASS (code) == tcc_constant && code != PTRMEM_CST)
2329 || (abi_version_at_least (2) && code == CONST_DECL))
2330 write_template_arg_literal (node);
2331 else if (DECL_P (node))
2333 /* Until ABI version 2, non-type template arguments of
2334 enumeration type were mangled using their names. */
2335 if (code == CONST_DECL && !abi_version_at_least (2))
2336 G.need_abi_warning = 1;
2338 /* Until ABI version 3, the underscore before the mangled name
2339 was incorrectly omitted. */
2340 if (!abi_version_at_least (3))
2342 G.need_abi_warning = 1;
2346 write_string ("_Z");
2347 write_encoding (node);
2352 /* Template arguments may be expressions. */
2354 write_expression (node);
2359 /* <template-template-arg>
2361 ::= <substitution> */
2364 write_template_template_arg (const tree decl)
2366 MANGLE_TRACE_TREE ("template-template-arg", decl);
2368 if (find_substitution (decl))
2370 write_name (decl, /*ignore_local_scope=*/0);
2371 add_substitution (decl);
2375 /* Non-terminal <array-type>. TYPE is an ARRAY_TYPE.
2377 <array-type> ::= A [</dimension/ number>] _ </element/ type>
2378 ::= A <expression> _ </element/ type>
2380 "Array types encode the dimension (number of elements) and the
2381 element type. For variable length arrays, the dimension (but not
2382 the '_' separator) is omitted." */
2385 write_array_type (const tree type)
2388 if (TYPE_DOMAIN (type))
2393 index_type = TYPE_DOMAIN (type);
2394 /* The INDEX_TYPE gives the upper and lower bounds of the
2396 max = TYPE_MAX_VALUE (index_type);
2397 if (TREE_CODE (max) == INTEGER_CST)
2399 /* The ABI specifies that we should mangle the number of
2400 elements in the array, not the largest allowed index. */
2401 max = size_binop (PLUS_EXPR, max, size_one_node);
2402 write_unsigned_number (tree_low_cst (max, 1));
2406 max = TREE_OPERAND (max, 0);
2407 if (!abi_version_at_least (2))
2409 /* value_dependent_expression_p presumes nothing is
2410 dependent when PROCESSING_TEMPLATE_DECL is zero. */
2411 ++processing_template_decl;
2412 if (!value_dependent_expression_p (max))
2413 G.need_abi_warning = 1;
2414 --processing_template_decl;
2416 write_expression (max);
2421 write_type (TREE_TYPE (type));
2424 /* Non-terminal <pointer-to-member-type> for pointer-to-member
2425 variables. TYPE is a pointer-to-member POINTER_TYPE.
2427 <pointer-to-member-type> ::= M </class/ type> </member/ type> */
2430 write_pointer_to_member_type (const tree type)
2433 write_type (TYPE_PTRMEM_CLASS_TYPE (type));
2434 write_type (TYPE_PTRMEM_POINTED_TO_TYPE (type));
2437 /* Non-terminal <template-param>. PARM is a TEMPLATE_TYPE_PARM,
2438 TEMPLATE_TEMPLATE_PARM, BOUND_TEMPLATE_TEMPLATE_PARM or a
2439 TEMPLATE_PARM_INDEX.
2441 <template-param> ::= T </parameter/ number> _ */
2444 write_template_param (const tree parm)
2448 tree parm_type = NULL_TREE;
2450 MANGLE_TRACE_TREE ("template-parm", parm);
2452 switch (TREE_CODE (parm))
2454 case TEMPLATE_TYPE_PARM:
2455 case TEMPLATE_TEMPLATE_PARM:
2456 case BOUND_TEMPLATE_TEMPLATE_PARM:
2457 parm_index = TEMPLATE_TYPE_IDX (parm);
2458 parm_level = TEMPLATE_TYPE_LEVEL (parm);
2461 case TEMPLATE_PARM_INDEX:
2462 parm_index = TEMPLATE_PARM_IDX (parm);
2463 parm_level = TEMPLATE_PARM_LEVEL (parm);
2464 parm_type = TREE_TYPE (TEMPLATE_PARM_DECL (parm));
2472 /* NUMBER as it appears in the mangling is (-1)-indexed, with the
2473 earliest template param denoted by `_'. */
2475 write_unsigned_number (parm_index - 1);
2479 /* <template-template-param>
2480 ::= <template-param>
2481 ::= <substitution> */
2484 write_template_template_param (const tree parm)
2486 tree template = NULL_TREE;
2488 /* PARM, a TEMPLATE_TEMPLATE_PARM, is an instantiation of the
2489 template template parameter. The substitution candidate here is
2490 only the template. */
2491 if (TREE_CODE (parm) == BOUND_TEMPLATE_TEMPLATE_PARM)
2494 = TI_TEMPLATE (TEMPLATE_TEMPLATE_PARM_TEMPLATE_INFO (parm));
2495 if (find_substitution (template))
2499 /* <template-param> encodes only the template parameter position,
2500 not its template arguments, which is fine here. */
2501 write_template_param (parm);
2503 add_substitution (template);
2506 /* Non-terminal <substitution>.
2508 <substitution> ::= S <seq-id> _
2512 write_substitution (const int seq_id)
2514 MANGLE_TRACE ("substitution", "");
2518 write_number (seq_id - 1, /*unsigned=*/1, 36);
2522 /* Start mangling ENTITY. */
2525 start_mangling (const tree entity, const bool ident_p)
2528 G.need_abi_warning = false;
2531 obstack_free (&name_obstack, name_base);
2532 mangle_obstack = &name_obstack;
2533 name_base = obstack_alloc (&name_obstack, 0);
2536 mangle_obstack = &ident_hash->stack;
2539 /* Done with mangling. Return the generated mangled name. If WARN is
2540 true, and the name of G.entity will be mangled differently in a
2541 future version of the ABI, issue a warning. */
2543 static inline const char *
2544 finish_mangling (const bool warn)
2546 if (warn_abi && warn && G.need_abi_warning)
2547 warning (OPT_Wabi, "the mangled name of %qD will change in a future "
2551 /* Clear all the substitutions. */
2552 VEC_truncate (tree, G.substitutions, 0);
2554 /* Null-terminate the string. */
2557 return (const char *) obstack_finish (mangle_obstack);
2560 /* Initialize data structures for mangling. */
2565 gcc_obstack_init (&name_obstack);
2566 name_base = obstack_alloc (&name_obstack, 0);
2567 G.substitutions = NULL;
2569 /* Cache these identifiers for quick comparison when checking for
2570 standard substitutions. */
2571 subst_identifiers[SUBID_ALLOCATOR] = get_identifier ("allocator");
2572 subst_identifiers[SUBID_BASIC_STRING] = get_identifier ("basic_string");
2573 subst_identifiers[SUBID_CHAR_TRAITS] = get_identifier ("char_traits");
2574 subst_identifiers[SUBID_BASIC_ISTREAM] = get_identifier ("basic_istream");
2575 subst_identifiers[SUBID_BASIC_OSTREAM] = get_identifier ("basic_ostream");
2576 subst_identifiers[SUBID_BASIC_IOSTREAM] = get_identifier ("basic_iostream");
2579 /* Generate the mangled name of DECL. */
2582 mangle_decl_string (const tree decl)
2586 start_mangling (decl, /*ident_p=*/true);
2588 if (TREE_CODE (decl) == TYPE_DECL)
2589 write_type (TREE_TYPE (decl));
2591 write_mangled_name (decl, true);
2593 result = finish_mangling (/*warn=*/true);
2595 fprintf (stderr, "mangle_decl_string = '%s'\n\n", result);
2599 /* Like get_identifier, except that NAME is assumed to have been
2600 allocated on the obstack used by the identifier hash table. */
2603 get_identifier_nocopy (const char *name)
2605 hashnode ht_node = ht_lookup (ident_hash, (const unsigned char *) name,
2606 strlen (name), HT_ALLOCED);
2607 return HT_IDENT_TO_GCC_IDENT (ht_node);
2610 /* Create an identifier for the external mangled name of DECL. */
2613 mangle_decl (const tree decl)
2615 SET_DECL_ASSEMBLER_NAME (decl,
2616 get_identifier_nocopy (mangle_decl_string (decl)));
2619 /* Generate the mangled representation of TYPE. */
2622 mangle_type_string (const tree type)
2626 start_mangling (type, /*ident_p=*/false);
2628 result = finish_mangling (/*warn=*/false);
2630 fprintf (stderr, "mangle_type_string = '%s'\n\n", result);
2634 /* Create an identifier for the mangled name of a special component
2635 for belonging to TYPE. CODE is the ABI-specified code for this
2639 mangle_special_for_type (const tree type, const char *code)
2643 /* We don't have an actual decl here for the special component, so
2644 we can't just process the <encoded-name>. Instead, fake it. */
2645 start_mangling (type, /*ident_p=*/true);
2647 /* Start the mangling. */
2648 write_string ("_Z");
2649 write_string (code);
2653 result = finish_mangling (/*warn=*/false);
2656 fprintf (stderr, "mangle_special_for_type = %s\n\n", result);
2658 return get_identifier_nocopy (result);
2661 /* Create an identifier for the mangled representation of the typeinfo
2662 structure for TYPE. */
2665 mangle_typeinfo_for_type (const tree type)
2667 return mangle_special_for_type (type, "TI");
2670 /* Create an identifier for the mangled name of the NTBS containing
2671 the mangled name of TYPE. */
2674 mangle_typeinfo_string_for_type (const tree type)
2676 return mangle_special_for_type (type, "TS");
2679 /* Create an identifier for the mangled name of the vtable for TYPE. */
2682 mangle_vtbl_for_type (const tree type)
2684 return mangle_special_for_type (type, "TV");
2687 /* Returns an identifier for the mangled name of the VTT for TYPE. */
2690 mangle_vtt_for_type (const tree type)
2692 return mangle_special_for_type (type, "TT");
2695 /* Return an identifier for a construction vtable group. TYPE is
2696 the most derived class in the hierarchy; BINFO is the base
2697 subobject for which this construction vtable group will be used.
2699 This mangling isn't part of the ABI specification; in the ABI
2700 specification, the vtable group is dumped in the same COMDAT as the
2701 main vtable, and is referenced only from that vtable, so it doesn't
2702 need an external name. For binary formats without COMDAT sections,
2703 though, we need external names for the vtable groups.
2705 We use the production
2707 <special-name> ::= CT <type> <offset number> _ <base type> */
2710 mangle_ctor_vtbl_for_type (const tree type, const tree binfo)
2714 start_mangling (type, /*ident_p=*/true);
2716 write_string ("_Z");
2717 write_string ("TC");
2719 write_integer_cst (BINFO_OFFSET (binfo));
2721 write_type (BINFO_TYPE (binfo));
2723 result = finish_mangling (/*warn=*/false);
2725 fprintf (stderr, "mangle_ctor_vtbl_for_type = %s\n\n", result);
2726 return get_identifier_nocopy (result);
2729 /* Mangle a this pointer or result pointer adjustment.
2731 <call-offset> ::= h <fixed offset number> _
2732 ::= v <fixed offset number> _ <virtual offset number> _ */
2735 mangle_call_offset (const tree fixed_offset, const tree virtual_offset)
2737 write_char (virtual_offset ? 'v' : 'h');
2739 /* For either flavor, write the fixed offset. */
2740 write_integer_cst (fixed_offset);
2743 /* For a virtual thunk, add the virtual offset. */
2746 write_integer_cst (virtual_offset);
2751 /* Return an identifier for the mangled name of a this-adjusting or
2752 covariant thunk to FN_DECL. FIXED_OFFSET is the initial adjustment
2753 to this used to find the vptr. If VIRTUAL_OFFSET is non-NULL, this
2754 is a virtual thunk, and it is the vtbl offset in
2755 bytes. THIS_ADJUSTING is nonzero for a this adjusting thunk and
2756 zero for a covariant thunk. Note, that FN_DECL might be a covariant
2757 thunk itself. A covariant thunk name always includes the adjustment
2758 for the this pointer, even if there is none.
2760 <special-name> ::= T <call-offset> <base encoding>
2761 ::= Tc <this_adjust call-offset> <result_adjust call-offset>
2765 mangle_thunk (tree fn_decl, const int this_adjusting, tree fixed_offset,
2766 tree virtual_offset)
2770 start_mangling (fn_decl, /*ident_p=*/true);
2772 write_string ("_Z");
2775 if (!this_adjusting)
2777 /* Covariant thunk with no this adjustment */
2779 mangle_call_offset (integer_zero_node, NULL_TREE);
2780 mangle_call_offset (fixed_offset, virtual_offset);
2782 else if (!DECL_THUNK_P (fn_decl))
2783 /* Plain this adjusting thunk. */
2784 mangle_call_offset (fixed_offset, virtual_offset);
2787 /* This adjusting thunk to covariant thunk. */
2789 mangle_call_offset (fixed_offset, virtual_offset);
2790 fixed_offset = ssize_int (THUNK_FIXED_OFFSET (fn_decl));
2791 virtual_offset = THUNK_VIRTUAL_OFFSET (fn_decl);
2793 virtual_offset = BINFO_VPTR_FIELD (virtual_offset);
2794 mangle_call_offset (fixed_offset, virtual_offset);
2795 fn_decl = THUNK_TARGET (fn_decl);
2799 write_encoding (fn_decl);
2801 result = finish_mangling (/*warn=*/false);
2803 fprintf (stderr, "mangle_thunk = %s\n\n", result);
2804 return get_identifier_nocopy (result);
2807 /* This hash table maps TYPEs to the IDENTIFIER for a conversion
2808 operator to TYPE. The nodes are IDENTIFIERs whose TREE_TYPE is the
2811 static GTY ((param_is (union tree_node))) htab_t conv_type_names;
2813 /* Hash a node (VAL1) in the table. */
2816 hash_type (const void *val)
2818 return (hashval_t) TYPE_UID (TREE_TYPE ((tree) val));
2821 /* Compare VAL1 (a node in the table) with VAL2 (a TYPE). */
2824 compare_type (const void *val1, const void *val2)
2826 return TREE_TYPE ((tree) val1) == (tree) val2;
2829 /* Return an identifier for the mangled unqualified name for a
2830 conversion operator to TYPE. This mangling is not specified by the
2831 ABI spec; it is only used internally. */
2834 mangle_conv_op_name_for_type (const tree type)
2839 if (type == error_mark_node)
2840 return error_mark_node;
2842 if (conv_type_names == NULL)
2843 conv_type_names = htab_create_ggc (31, &hash_type, &compare_type, NULL);
2845 slot = htab_find_slot_with_hash (conv_type_names, type,
2846 (hashval_t) TYPE_UID (type), INSERT);
2847 identifier = (tree)*slot;
2852 /* Create a unique name corresponding to TYPE. */
2853 sprintf (buffer, "operator %lu",
2854 (unsigned long) htab_elements (conv_type_names));
2855 identifier = get_identifier (buffer);
2858 /* Hang TYPE off the identifier so it can be found easily later
2859 when performing conversions. */
2860 TREE_TYPE (identifier) = type;
2862 /* Set bits on the identifier so we know later it's a conversion. */
2863 IDENTIFIER_OPNAME_P (identifier) = 1;
2864 IDENTIFIER_TYPENAME_P (identifier) = 1;
2870 /* Return an identifier for the name of an initialization guard
2871 variable for indicated VARIABLE. */
2874 mangle_guard_variable (const tree variable)
2876 start_mangling (variable, /*ident_p=*/true);
2877 write_string ("_ZGV");
2878 if (strncmp (IDENTIFIER_POINTER (DECL_NAME (variable)), "_ZGR", 4) == 0)
2879 /* The name of a guard variable for a reference temporary should refer
2880 to the reference, not the temporary. */
2881 write_string (IDENTIFIER_POINTER (DECL_NAME (variable)) + 4);
2883 write_name (variable, /*ignore_local_scope=*/0);
2884 return get_identifier_nocopy (finish_mangling (/*warn=*/false));
2887 /* Return an identifier for the name of a temporary variable used to
2888 initialize a static reference. This isn't part of the ABI, but we might
2889 as well call them something readable. */
2892 mangle_ref_init_variable (const tree variable)
2894 start_mangling (variable, /*ident_p=*/true);
2895 write_string ("_ZGR");
2896 write_name (variable, /*ignore_local_scope=*/0);
2897 return get_identifier_nocopy (finish_mangling (/*warn=*/false));
2901 /* Foreign language type mangling section. */
2903 /* How to write the type codes for the integer Java type. */
2906 write_java_integer_type_codes (const tree type)
2908 if (type == java_int_type_node)
2910 else if (type == java_short_type_node)
2912 else if (type == java_byte_type_node)
2914 else if (type == java_char_type_node)
2916 else if (type == java_long_type_node)
2918 else if (type == java_boolean_type_node)
2924 #include "gt-cp-mangle.h"