1 /* Name mangling for the 3.0 C++ ABI.
2 Copyright (C) 2000, 2001, 2002 Free Software Foundation, Inc.
3 Written by Alex Samuel <sameul@codesourcery.com>
5 This file is part of GNU CC.
7 GNU CC is free software; you can redistribute it and/or modify it
8 under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU CC is distributed in the hope that it will be useful, but
13 WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU CC; see the file COPYING. If not, write to the Free
19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
22 /* This file implements mangling of C++ names according to the IA64
23 C++ ABI specification. A mangled name encodes a function or
24 variable's name, scope, type, and/or template arguments into a text
25 identifier. This identifier is used as the function's or
26 variable's linkage name, to preserve compatibility between C++'s
27 language features (templates, scoping, and overloading) and C
30 Additionally, g++ uses mangled names internally. To support this,
31 mangling of types is allowed, even though the mangled name of a
32 type should not appear by itself as an exported name. Ditto for
33 uninstantiated templates.
35 The primary entry point for this module is mangle_decl, which
36 returns an identifier containing the mangled name for a decl.
37 Additional entry points are provided to build mangled names of
38 particular constructs when the appropriate decl for that construct
39 is not available. These are:
41 mangle_typeinfo_for_type: typeinfo data
42 mangle_typeinfo_string_for_type: typeinfo type name
43 mangle_vtbl_for_type: virtual table data
44 mangle_vtt_for_type: VTT data
45 mangle_ctor_vtbl_for_type: `C-in-B' constructor virtual table data
46 mangle_thunk: thunk function or entry
58 /* Debugging support. */
60 /* Define DEBUG_MANGLE to enable very verbose trace messages. */
62 #define DEBUG_MANGLE 0
65 /* Macros for tracing the write_* functions. */
67 # define MANGLE_TRACE(FN, INPUT) \
68 fprintf (stderr, " %-24s: %-24s\n", (FN), (INPUT))
69 # define MANGLE_TRACE_TREE(FN, NODE) \
70 fprintf (stderr, " %-24s: %-24s (%p)\n", \
71 (FN), tree_code_name[TREE_CODE (NODE)], (void *) (NODE))
73 # define MANGLE_TRACE(FN, INPUT)
74 # define MANGLE_TRACE_TREE(FN, NODE)
77 /* Non-zero if NODE is a class template-id. We can't rely on
78 CLASSTYPE_USE_TEMPLATE here because of tricky bugs in the parser
79 that hard to distinguish A<T> from A, where A<T> is the type as
80 instantiated outside of the template, and A is the type used
81 without parameters inside the template. */
82 #define CLASSTYPE_TEMPLATE_ID_P(NODE) \
83 (TYPE_LANG_SPECIFIC (NODE) != NULL \
84 && CLASSTYPE_TEMPLATE_INFO (NODE) != NULL \
85 && (PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (NODE))))
87 /* Things we only need one of. This module is not reentrant. */
90 /* The name in which we're building the mangled name. */
91 struct obstack name_obstack;
93 /* An array of the current substitution candidates, in the order
95 varray_type substitutions;
98 /* Indices into subst_identifiers. These are identifiers used in
99 special substitution rules. */
107 SUBID_BASIC_IOSTREAM,
110 substitution_identifier_index_t;
112 /* For quick substitution checks, look up these common identifiers
114 static tree subst_identifiers[SUBID_MAX];
116 /* Single-letter codes for builtin integer types, defined in
117 <builtin-type>. These are indexed by integer_type_kind values. */
119 integer_type_codes[itk_none] =
122 'a', /* itk_signed_char */
123 'h', /* itk_unsigned_char */
125 't', /* itk_unsigned_short */
127 'j', /* itk_unsigned_int */
129 'm', /* itk_unsigned_long */
130 'x', /* itk_long_long */
131 'y' /* itk_unsigned_long_long */
134 static int decl_is_template_id PARAMS ((tree, tree*));
136 /* Functions for handling substitutions. */
138 static inline tree canonicalize_for_substitution PARAMS ((tree));
139 static void add_substitution PARAMS ((tree));
140 static inline int is_std_substitution PARAMS ((tree, substitution_identifier_index_t));
141 static inline int is_std_substitution_char PARAMS ((tree, substitution_identifier_index_t));
142 static int find_substitution PARAMS ((tree));
144 /* Functions for emitting mangled representations of things. */
146 static void write_mangled_name PARAMS ((tree));
147 static void write_encoding PARAMS ((tree));
148 static void write_name PARAMS ((tree, int));
149 static void write_unscoped_name PARAMS ((tree));
150 static void write_unscoped_template_name PARAMS ((tree));
151 static void write_nested_name PARAMS ((tree));
152 static void write_prefix PARAMS ((tree));
153 static void write_template_prefix PARAMS ((tree));
154 static void write_unqualified_name PARAMS ((tree));
155 static void write_source_name PARAMS ((tree));
156 static int hwint_to_ascii PARAMS ((unsigned HOST_WIDE_INT, unsigned int, char *, unsigned));
157 static void write_number PARAMS ((unsigned HOST_WIDE_INT, int,
159 static void write_integer_cst PARAMS ((tree));
160 static void write_identifier PARAMS ((const char *));
161 static void write_special_name_constructor PARAMS ((tree));
162 static void write_special_name_destructor PARAMS ((tree));
163 static void write_type PARAMS ((tree));
164 static int write_CV_qualifiers_for_type PARAMS ((tree));
165 static void write_builtin_type PARAMS ((tree));
166 static void write_function_type PARAMS ((tree));
167 static void write_bare_function_type PARAMS ((tree, int, tree));
168 static void write_method_parms PARAMS ((tree, int, tree));
169 static void write_class_enum_type PARAMS ((tree));
170 static void write_template_args PARAMS ((tree));
171 static void write_expression PARAMS ((tree));
172 static void write_template_arg_literal PARAMS ((tree));
173 static void write_template_arg PARAMS ((tree));
174 static void write_template_template_arg PARAMS ((tree));
175 static void write_array_type PARAMS ((tree));
176 static void write_pointer_to_member_type PARAMS ((tree));
177 static void write_template_param PARAMS ((tree));
178 static void write_template_template_param PARAMS ((tree));
179 static void write_substitution PARAMS ((int));
180 static int discriminator_for_local_entity PARAMS ((tree));
181 static int discriminator_for_string_literal PARAMS ((tree, tree));
182 static void write_discriminator PARAMS ((int));
183 static void write_local_name PARAMS ((tree, tree, tree));
184 static void dump_substitution_candidates PARAMS ((void));
185 static const char *mangle_decl_string PARAMS ((tree));
187 /* Control functions. */
189 static inline void start_mangling PARAMS ((void));
190 static inline const char *finish_mangling PARAMS ((void));
191 static tree mangle_special_for_type PARAMS ((tree, const char *));
193 /* Foreign language functions. */
195 static void write_java_integer_type_codes PARAMS ((tree));
197 /* Append a single character to the end of the mangled
199 #define write_char(CHAR) \
200 obstack_1grow (&G.name_obstack, (CHAR))
202 /* Append a sized buffer to the end of the mangled representation. */
203 #define write_chars(CHAR, LEN) \
204 obstack_grow (&G.name_obstack, (CHAR), (LEN))
206 /* Append a NUL-terminated string to the end of the mangled
208 #define write_string(STRING) \
209 obstack_grow (&G.name_obstack, (STRING), strlen (STRING))
211 /* Return the position at which the next character will be appended to
212 the mangled representation. */
213 #define mangled_position() \
214 obstack_object_size (&G.name_obstack)
216 /* Non-zero if NODE1 and NODE2 are both TREE_LIST nodes and have the
217 same purpose (context, which may be a type) and value (template
218 decl). See write_template_prefix for more information on what this
220 #define NESTED_TEMPLATE_MATCH(NODE1, NODE2) \
221 (TREE_CODE (NODE1) == TREE_LIST \
222 && TREE_CODE (NODE2) == TREE_LIST \
223 && ((TYPE_P (TREE_PURPOSE (NODE1)) \
224 && same_type_p (TREE_PURPOSE (NODE1), TREE_PURPOSE (NODE2)))\
225 || TREE_PURPOSE (NODE1) == TREE_PURPOSE (NODE2)) \
226 && TREE_VALUE (NODE1) == TREE_VALUE (NODE2))
228 /* Write out a signed quantity in base 10. */
229 #define write_signed_number(NUMBER) \
230 write_number ((NUMBER), /*unsigned_p=*/0, 10)
232 /* Write out an unsigned quantity in base 10. */
233 #define write_unsigned_number(NUMBER) \
234 write_number ((NUMBER), /*unsigned_p=*/1, 10)
236 /* If DECL is a template instance, return non-zero and, if
237 TEMPLATE_INFO is non-NULL, set *TEMPLATE_INFO to its template info.
238 Otherwise return zero. */
241 decl_is_template_id (decl, template_info)
245 if (TREE_CODE (decl) == TYPE_DECL)
247 /* TYPE_DECLs are handled specially. Look at its type to decide
248 if this is a template instantiation. */
249 tree type = TREE_TYPE (decl);
251 if (CLASS_TYPE_P (type) && CLASSTYPE_TEMPLATE_ID_P (type))
253 if (template_info != NULL)
254 /* For a templated TYPE_DECL, the template info is hanging
256 *template_info = CLASSTYPE_TEMPLATE_INFO (type);
262 /* Check if this is a primary template. */
263 if (DECL_LANG_SPECIFIC (decl) != NULL
264 && DECL_USE_TEMPLATE (decl)
265 && PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl))
266 && TREE_CODE (decl) != TEMPLATE_DECL)
268 if (template_info != NULL)
269 /* For most templated decls, the template info is hanging
271 *template_info = DECL_TEMPLATE_INFO (decl);
276 /* It's not a template id. */
280 /* Produce debugging output of current substitution candidates. */
283 dump_substitution_candidates ()
287 fprintf (stderr, " ++ substitutions ");
288 for (i = 0; i < VARRAY_ACTIVE_SIZE (G.substitutions); ++i)
290 tree el = VARRAY_TREE (G.substitutions, i);
291 const char *name = "???";
294 fprintf (stderr, " ");
296 name = IDENTIFIER_POINTER (DECL_NAME (el));
297 else if (TREE_CODE (el) == TREE_LIST)
298 name = IDENTIFIER_POINTER (DECL_NAME (TREE_VALUE (el)));
299 else if (TYPE_NAME (el))
300 name = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (el)));
301 fprintf (stderr, " S%d_ = ", i - 1);
303 (CP_TYPE_RESTRICT_P (el)
304 || CP_TYPE_VOLATILE_P (el)
305 || CP_TYPE_CONST_P (el)))
306 fprintf (stderr, "CV-");
307 fprintf (stderr, "%s (%s at %p)\n",
308 name, tree_code_name[TREE_CODE (el)], (void *) el);
312 /* Both decls and types can be substitution candidates, but sometimes
313 they refer to the same thing. For instance, a TYPE_DECL and
314 RECORD_TYPE for the same class refer to the same thing, and should
315 be treated accordinginly in substitutions. This function returns a
316 canonicalized tree node representing NODE that is used when adding
317 and substitution candidates and finding matches. */
320 canonicalize_for_substitution (node)
323 /* For a TYPE_DECL, use the type instead. */
324 if (TREE_CODE (node) == TYPE_DECL)
325 node = TREE_TYPE (node);
327 node = canonical_type_variant (node);
332 /* Add NODE as a substitution candidate. NODE must not already be on
333 the list of candidates. */
336 add_substitution (node)
342 fprintf (stderr, " ++ add_substitution (%s at %10p)\n",
343 tree_code_name[TREE_CODE (node)], (void *) node);
345 /* Get the canonicalized substitution candidate for NODE. */
346 c = canonicalize_for_substitution (node);
347 if (DEBUG_MANGLE && c != node)
348 fprintf (stderr, " ++ using candidate (%s at %10p)\n",
349 tree_code_name[TREE_CODE (node)], (void *) node);
353 /* Make sure NODE isn't already a candidate. */
356 for (i = VARRAY_ACTIVE_SIZE (G.substitutions); --i >= 0; )
358 tree candidate = VARRAY_TREE (G.substitutions, i);
360 && node == candidate)
362 && TYPE_P (candidate)
363 && same_type_p (node, candidate)))
367 #endif /* ENABLE_CHECKING */
369 /* Put the decl onto the varray of substitution candidates. */
370 VARRAY_PUSH_TREE (G.substitutions, node);
373 dump_substitution_candidates ();
376 /* Helper function for find_substitution. Returns non-zero if NODE,
377 which may be a decl or a CLASS_TYPE, is a template-id with template
378 name of substitution_index[INDEX] in the ::std namespace. */
381 is_std_substitution (node, index)
383 substitution_identifier_index_t index;
390 type = TREE_TYPE (node);
393 else if (CLASS_TYPE_P (node))
396 decl = TYPE_NAME (node);
399 /* These are not the droids you're looking for. */
402 return (DECL_NAMESPACE_STD_P (CP_DECL_CONTEXT (decl))
403 && TYPE_LANG_SPECIFIC (type)
404 && CLASSTYPE_TEMPLATE_INFO (type)
405 && (DECL_NAME (CLASSTYPE_TI_TEMPLATE (type))
406 == subst_identifiers[index]));
409 /* Helper function for find_substitution. Returns non-zero if NODE,
410 which may be a decl or a CLASS_TYPE, is the template-id
411 ::std::identifier<char>, where identifier is
412 substitution_index[INDEX]. */
415 is_std_substitution_char (node, index)
417 substitution_identifier_index_t index;
420 /* Check NODE's name is ::std::identifier. */
421 if (!is_std_substitution (node, index))
423 /* Figure out its template args. */
425 args = DECL_TI_ARGS (node);
426 else if (CLASS_TYPE_P (node))
427 args = CLASSTYPE_TI_ARGS (node);
429 /* Oops, not a template. */
431 /* NODE's template arg list should be <char>. */
433 TREE_VEC_LENGTH (args) == 1
434 && TREE_VEC_ELT (args, 0) == char_type_node;
437 /* Check whether a substitution should be used to represent NODE in
440 First, check standard special-case substitutions.
442 <substitution> ::= St
449 # ::std::basic_string
452 # ::std::basic_string<char,
453 ::std::char_traits<char>,
454 ::std::allocator<char> >
457 # ::std::basic_istream<char, ::std::char_traits<char> >
460 # ::std::basic_ostream<char, ::std::char_traits<char> >
463 # ::std::basic_iostream<char, ::std::char_traits<char> >
465 Then examine the stack of currently available substitution
466 candidates for entities appearing earlier in the same mangling
468 If a substitution is found, write its mangled representation and
469 return non-zero. If none is found, just return zero. */
472 find_substitution (node)
476 int size = VARRAY_ACTIVE_SIZE (G.substitutions);
481 fprintf (stderr, " ++ find_substitution (%s at %p)\n",
482 tree_code_name[TREE_CODE (node)], (void *) node);
484 /* Obtain the canonicalized substitution representation for NODE.
485 This is what we'll compare against. */
486 node = canonicalize_for_substitution (node);
488 /* Check for builtin substitutions. */
490 decl = TYPE_P (node) ? TYPE_NAME (node) : node;
491 type = TYPE_P (node) ? node : TREE_TYPE (node);
493 /* Check for std::allocator. */
495 && is_std_substitution (decl, SUBID_ALLOCATOR)
496 && !CLASSTYPE_USE_TEMPLATE (TREE_TYPE (decl)))
502 /* Check for std::basic_string. */
503 if (decl && is_std_substitution (decl, SUBID_BASIC_STRING))
507 /* If this is a type (i.e. a fully-qualified template-id),
509 std::basic_string <char,
510 std::char_traits<char>,
511 std::allocator<char> > . */
512 if (cp_type_quals (type) == TYPE_UNQUALIFIED
513 && CLASSTYPE_USE_TEMPLATE (type))
515 tree args = CLASSTYPE_TI_ARGS (type);
516 if (TREE_VEC_LENGTH (args) == 3
517 && same_type_p (TREE_VEC_ELT (args, 0), char_type_node)
518 && is_std_substitution_char (TREE_VEC_ELT (args, 1),
520 && is_std_substitution_char (TREE_VEC_ELT (args, 2),
529 /* Substitute for the template name only if this isn't a type. */
536 /* Check for basic_{i,o,io}stream. */
538 && cp_type_quals (type) == TYPE_UNQUALIFIED
539 && CLASS_TYPE_P (type)
540 && CLASSTYPE_USE_TEMPLATE (type)
541 && CLASSTYPE_TEMPLATE_INFO (type) != NULL)
543 /* First, check for the template
544 args <char, std::char_traits<char> > . */
545 tree args = CLASSTYPE_TI_ARGS (type);
546 if (TREE_VEC_LENGTH (args) == 2
547 && same_type_p (TREE_VEC_ELT (args, 0), char_type_node)
548 && is_std_substitution_char (TREE_VEC_ELT (args, 1),
551 /* Got them. Is this basic_istream? */
552 tree name = DECL_NAME (CLASSTYPE_TI_TEMPLATE (type));
553 if (name == subst_identifiers[SUBID_BASIC_ISTREAM])
558 /* Or basic_ostream? */
559 else if (name == subst_identifiers[SUBID_BASIC_OSTREAM])
564 /* Or basic_iostream? */
565 else if (name == subst_identifiers[SUBID_BASIC_IOSTREAM])
573 /* Check for namespace std. */
574 if (decl && DECL_NAMESPACE_STD_P (decl))
580 /* Now check the list of available substitutions for this mangling
582 for (i = 0; i < size; ++i)
584 tree candidate = VARRAY_TREE (G.substitutions, i);
585 /* NODE is a matched to a candidate if it's the same decl node or
586 if it's the same type. */
587 if (decl == candidate
588 || (TYPE_P (candidate) && type && TYPE_P (type)
589 && same_type_p (type, candidate))
590 || NESTED_TEMPLATE_MATCH (node, candidate))
592 write_substitution (i);
597 /* No substitution found. */
602 /* <mangled-name> ::= _Z <encoding> */
605 write_mangled_name (decl)
608 MANGLE_TRACE_TREE ("mangled-name", decl);
610 if (DECL_LANG_SPECIFIC (decl)
611 && DECL_EXTERN_C_FUNCTION_P (decl)
612 && ! DECL_OVERLOADED_OPERATOR_P (decl))
613 /* The standard notes:
614 "The <encoding> of an extern "C" function is treated like
615 global-scope data, i.e. as its <source-name> without a type."
616 We cannot write overloaded operators that way though,
617 because it contains characters invalid in assembler. */
618 write_source_name (DECL_NAME (decl));
620 /* C++ name; needs to be mangled. */
623 write_encoding (decl);
627 /* <encoding> ::= <function name> <bare-function-type>
631 write_encoding (decl)
634 MANGLE_TRACE_TREE ("encoding", decl);
636 if (DECL_LANG_SPECIFIC (decl) && DECL_EXTERN_C_FUNCTION_P (decl))
638 /* For overloaded operators write just the mangled name
639 without arguments. */
640 if (DECL_OVERLOADED_OPERATOR_P (decl))
641 write_name (decl, /*ignore_local_scope=*/0);
643 write_source_name (DECL_NAME (decl));
647 write_name (decl, /*ignore_local_scope=*/0);
648 if (TREE_CODE (decl) == FUNCTION_DECL)
652 if (decl_is_template_id (decl, NULL))
653 fn_type = get_mostly_instantiated_function_type (decl, NULL, NULL);
655 fn_type = TREE_TYPE (decl);
657 write_bare_function_type (fn_type,
658 (!DECL_CONSTRUCTOR_P (decl)
659 && !DECL_DESTRUCTOR_P (decl)
660 && !DECL_CONV_FN_P (decl)
661 && decl_is_template_id (decl, NULL)),
666 /* <name> ::= <unscoped-name>
667 ::= <unscoped-template-name> <template-args>
671 If IGNORE_LOCAL_SCOPE is non-zero, this production of <name> is
672 called from <local-name>, which mangles the enclosing scope
673 elsewhere and then uses this function to mangle just the part
674 underneath the function scope. So don't use the <local-name>
675 production, to avoid an infinite recursion. */
678 write_name (decl, ignore_local_scope)
680 int ignore_local_scope;
684 MANGLE_TRACE_TREE ("name", decl);
686 if (TREE_CODE (decl) == TYPE_DECL)
688 /* In case this is a typedef, fish out the corresponding
689 TYPE_DECL for the main variant. */
690 decl = TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl)));
691 context = TYPE_CONTEXT (TYPE_MAIN_VARIANT (TREE_TYPE (decl)));
694 context = (DECL_CONTEXT (decl) == NULL) ? NULL : CP_DECL_CONTEXT (decl);
696 /* A decl in :: or ::std scope is treated specially. The former is
697 mangled using <unscoped-name> or <unscoped-template-name>, the
698 latter with a special substitution. Also, a name that is
699 directly in a local function scope is also mangled with
700 <unscoped-name> rather than a full <nested-name>. */
702 || context == global_namespace
703 || DECL_NAMESPACE_STD_P (context)
704 || (ignore_local_scope && TREE_CODE (context) == FUNCTION_DECL))
707 /* Is this a template instance? */
708 if (decl_is_template_id (decl, &template_info))
710 /* Yes: use <unscoped-template-name>. */
711 write_unscoped_template_name (TI_TEMPLATE (template_info));
712 write_template_args (TI_ARGS (template_info));
715 /* Everything else gets an <unqualified-name>. */
716 write_unscoped_name (decl);
720 /* Handle local names, unless we asked not to (that is, invoked
721 under <local-name>, to handle only the part of the name under
723 if (!ignore_local_scope)
725 /* Scan up the list of scope context, looking for a
726 function. If we find one, this entity is in local
727 function scope. local_entity tracks context one scope
728 level down, so it will contain the element that's
729 directly in that function's scope, either decl or one of
730 its enclosing scopes. */
731 tree local_entity = decl;
732 while (context != NULL && context != global_namespace)
734 /* Make sure we're always dealing with decls. */
735 if (context != NULL && TYPE_P (context))
736 context = TYPE_NAME (context);
737 /* Is this a function? */
738 if (TREE_CODE (context) == FUNCTION_DECL)
740 /* Yes, we have local scope. Use the <local-name>
741 production for the innermost function scope. */
742 write_local_name (context, local_entity, decl);
745 /* Up one scope level. */
746 local_entity = context;
747 context = CP_DECL_CONTEXT (context);
750 /* No local scope found? Fall through to <nested-name>. */
753 /* Other decls get a <nested-name> to encode their scope. */
754 write_nested_name (decl);
758 /* <unscoped-name> ::= <unqualified-name>
759 ::= St <unqualified-name> # ::std:: */
762 write_unscoped_name (decl)
765 tree context = CP_DECL_CONTEXT (decl);
767 MANGLE_TRACE_TREE ("unscoped-name", decl);
769 /* Is DECL in ::std? */
770 if (DECL_NAMESPACE_STD_P (context))
773 write_unqualified_name (decl);
775 /* If not, it should be either in the global namespace, or directly
776 in a local function scope. */
777 else if (context == global_namespace
779 || TREE_CODE (context) == FUNCTION_DECL)
780 write_unqualified_name (decl);
785 /* <unscoped-template-name> ::= <unscoped-name>
786 ::= <substitution> */
789 write_unscoped_template_name (decl)
792 MANGLE_TRACE_TREE ("unscoped-template-name", decl);
794 if (find_substitution (decl))
796 write_unscoped_name (decl);
797 add_substitution (decl);
800 /* Write the nested name, including CV-qualifiers, of DECL.
802 <nested-name> ::= N [<CV-qualifiers>] <prefix> <unqualified-name> E
803 ::= N [<CV-qualifiers>] <template-prefix> <template-args> E
805 <CV-qualifiers> ::= [r] [V] [K] */
808 write_nested_name (decl)
813 MANGLE_TRACE_TREE ("nested-name", decl);
817 /* Write CV-qualifiers, if this is a member function. */
818 if (TREE_CODE (decl) == FUNCTION_DECL
819 && DECL_NONSTATIC_MEMBER_FUNCTION_P (decl))
821 if (DECL_VOLATILE_MEMFUNC_P (decl))
823 if (DECL_CONST_MEMFUNC_P (decl))
827 /* Is this a template instance? */
828 if (decl_is_template_id (decl, &template_info))
830 /* Yes, use <template-prefix>. */
831 write_template_prefix (decl);
832 write_template_args (TI_ARGS (template_info));
836 /* No, just use <prefix> */
837 write_prefix (DECL_CONTEXT (decl));
838 write_unqualified_name (decl);
843 /* <prefix> ::= <prefix> <unqualified-name>>
844 ::= <template-prefix> <template-args>
846 ::= <substitution> */
853 /* Non-NULL if NODE represents a template-id. */
854 tree template_info = NULL;
856 MANGLE_TRACE_TREE ("prefix", node);
859 || node == global_namespace)
862 if (find_substitution (node))
866 /* Node is a decl. */
868 /* If this is a function decl, that means we've hit function
869 scope, so this prefix must be for a local name. In this
870 case, we're under the <local-name> production, which encodes
871 the enclosing function scope elsewhere. So don't continue
873 if (TREE_CODE (node) == FUNCTION_DECL)
877 decl_is_template_id (decl, &template_info);
880 /* Node is a type. */
882 decl = TYPE_NAME (node);
883 if (CLASSTYPE_TEMPLATE_ID_P (node))
884 template_info = CLASSTYPE_TEMPLATE_INFO (node);
887 if (template_info != NULL)
890 write_template_prefix (decl);
891 write_template_args (TI_ARGS (template_info));
896 write_prefix (CP_DECL_CONTEXT (decl));
897 write_unqualified_name (decl);
900 add_substitution (node);
903 /* <template-prefix> ::= <prefix> <template component>
904 ::= <substitution> */
907 write_template_prefix (node)
910 tree decl = DECL_P (node) ? node : TYPE_NAME (node);
911 tree type = DECL_P (node) ? TREE_TYPE (node) : node;
912 tree context = CP_DECL_CONTEXT (decl);
917 MANGLE_TRACE_TREE ("template-prefix", node);
919 /* Find the template decl. */
920 if (decl_is_template_id (decl, &template_info))
921 template = TI_TEMPLATE (template_info);
922 else if (CLASSTYPE_TEMPLATE_ID_P (type))
923 template = CLASSTYPE_TI_TEMPLATE (type);
925 /* Oops, not a template. */
928 /* For a member template, though, the template name for the
929 innermost name must have all the outer template levels
930 instantiated. For instance, consider
932 template<typename T> struct Outer {
933 template<typename U> struct Inner {};
936 The template name for `Inner' in `Outer<int>::Inner<float>' is
937 `Outer<int>::Inner<U>'. In g++, we don't instantiate the template
938 levels separately, so there's no TEMPLATE_DECL available for this
939 (there's only `Outer<T>::Inner<U>').
941 In order to get the substitutions right, we create a special
942 TREE_LIST to represent the substitution candidate for a nested
943 template. The TREE_PURPOSE is the template's context, fully
944 instantiated, and the TREE_VALUE is the TEMPLATE_DECL for the inner
947 So, for the example above, `Outer<int>::Inner' is represented as a
948 substitution candidate by a TREE_LIST whose purpose is `Outer<int>'
949 and whose value is `Outer<T>::Inner<U>'. */
950 if (TYPE_P (context))
951 substitution = build_tree_list (context, template);
953 substitution = template;
955 if (find_substitution (substitution))
958 write_prefix (context);
959 write_unqualified_name (decl);
961 add_substitution (substitution);
964 /* We don't need to handle thunks, vtables, or VTTs here. Those are
965 mangled through special entry points.
967 <unqualified-name> ::= <operator-name>
972 write_unqualified_name (decl)
975 MANGLE_TRACE_TREE ("unqualified-name", decl);
977 if (DECL_LANG_SPECIFIC (decl) != NULL && DECL_CONSTRUCTOR_P (decl))
978 write_special_name_constructor (decl);
979 else if (DECL_LANG_SPECIFIC (decl) != NULL && DECL_DESTRUCTOR_P (decl))
980 write_special_name_destructor (decl);
981 else if (DECL_CONV_FN_P (decl))
983 /* Conversion operator. Handle it right here.
984 <operator> ::= cv <type> */
986 if (decl_is_template_id (decl, NULL))
988 tree fn_type = get_mostly_instantiated_function_type (decl, NULL,
990 type = TREE_TYPE (fn_type);
993 type = TREE_TYPE (DECL_NAME (decl));
997 else if (DECL_OVERLOADED_OPERATOR_P (decl))
999 operator_name_info_t *oni;
1000 if (DECL_ASSIGNMENT_OPERATOR_P (decl))
1001 oni = assignment_operator_name_info;
1003 oni = operator_name_info;
1005 write_string (oni[DECL_OVERLOADED_OPERATOR_P (decl)].mangled_name);
1008 write_source_name (DECL_NAME (decl));
1011 /* Non-termial <source-name>. IDENTIFIER is an IDENTIFIER_NODE.
1013 <source-name> ::= </length/ number> <identifier> */
1016 write_source_name (identifier)
1019 MANGLE_TRACE_TREE ("source-name", identifier);
1021 /* Never write the whole template-id name including the template
1022 arguments; we only want the template name. */
1023 if (IDENTIFIER_TEMPLATE (identifier))
1024 identifier = IDENTIFIER_TEMPLATE (identifier);
1026 write_unsigned_number (IDENTIFIER_LENGTH (identifier));
1027 write_identifier (IDENTIFIER_POINTER (identifier));
1030 /* Convert NUMBER to ascii using base BASE and generating at least
1031 MIN_DIGITS characters. BUFFER points to the _end_ of the buffer
1032 into which to store the characters. Returns the number of
1033 characters generated (these will be layed out in advance of where
1037 hwint_to_ascii (number, base, buffer, min_digits)
1038 unsigned HOST_WIDE_INT number;
1041 unsigned min_digits;
1043 static const char base_digits[] = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
1044 unsigned digits = 0;
1048 unsigned HOST_WIDE_INT d = number / base;
1050 *--buffer = base_digits[number - d * base];
1054 while (digits < min_digits)
1056 *--buffer = base_digits[0];
1062 /* Non-terminal <number>.
1064 <number> ::= [n] </decimal integer/> */
1067 write_number (number, unsigned_p, base)
1068 unsigned HOST_WIDE_INT number;
1072 char buffer[sizeof (HOST_WIDE_INT) * 8];
1075 if (!unsigned_p && (HOST_WIDE_INT) number < 0)
1078 number = -((HOST_WIDE_INT) number);
1080 count = hwint_to_ascii (number, base, buffer + sizeof (buffer), 1);
1081 write_chars (buffer + sizeof (buffer) - count, count);
1084 /* Write out an integral CST in decimal. Most numbers are small, and
1085 representable in a HOST_WIDE_INT. Occasionally we'll have numbers
1086 bigger than that, which we must deal with. */
1089 write_integer_cst (cst)
1092 int sign = tree_int_cst_sgn (cst);
1094 if (TREE_INT_CST_HIGH (cst) + (sign < 0))
1096 /* A bignum. We do this in chunks, each of which fits in a
1098 char buffer[sizeof (HOST_WIDE_INT) * 8 * 2];
1099 unsigned HOST_WIDE_INT chunk;
1100 unsigned chunk_digits;
1101 char *ptr = buffer + sizeof (buffer);
1106 /* HOST_WIDE_INT must be at least 32 bits, so 10^9 is
1111 if (sizeof (HOST_WIDE_INT) >= 8)
1113 /* It is at least 64 bits, so 10^18 is representable. */
1118 type = signed_or_unsigned_type (1, TREE_TYPE (cst));
1119 base = build_int_2 (chunk, 0);
1120 n = build_int_2 (TREE_INT_CST_LOW (cst), TREE_INT_CST_HIGH (cst));
1121 TREE_TYPE (n) = TREE_TYPE (base) = type;
1126 n = fold (build1 (NEGATE_EXPR, type, n));
1130 tree d = fold (build (FLOOR_DIV_EXPR, type, n, base));
1131 tree tmp = fold (build (MULT_EXPR, type, d, base));
1134 done = integer_zerop (d);
1135 tmp = fold (build (MINUS_EXPR, type, n, tmp));
1136 c = hwint_to_ascii (TREE_INT_CST_LOW (tmp), 10, ptr,
1137 done ? 1 : chunk_digits);
1143 write_chars (ptr, count);
1148 unsigned HOST_WIDE_INT low = TREE_INT_CST_LOW (cst);
1155 write_unsigned_number (low);
1159 /* Non-terminal <identifier>.
1161 <identifier> ::= </unqualified source code identifier> */
1164 write_identifier (identifier)
1165 const char *identifier;
1167 MANGLE_TRACE ("identifier", identifier);
1168 write_string (identifier);
1171 /* Handle constructor productions of non-terminal <special-name>.
1172 CTOR is a constructor FUNCTION_DECL.
1174 <special-name> ::= C1 # complete object constructor
1175 ::= C2 # base object constructor
1176 ::= C3 # complete object allocating constructor
1178 Currently, allocating constructors are never used.
1180 We also need to provide mangled names for the maybe-in-charge
1181 constructor, so we treat it here too. mangle_decl_string will
1182 append *INTERNAL* to that, to make sure we never emit it. */
1185 write_special_name_constructor (ctor)
1188 if (DECL_COMPLETE_CONSTRUCTOR_P (ctor)
1189 /* Even though we don't ever emit a definition of the
1190 old-style destructor, we still have to consider entities
1191 (like static variables) nested inside it. */
1192 || DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (ctor))
1193 write_string ("C1");
1194 else if (DECL_BASE_CONSTRUCTOR_P (ctor))
1195 write_string ("C2");
1200 /* Handle destructor productions of non-terminal <special-name>.
1201 DTOR is a destructor FUNCTION_DECL.
1203 <special-name> ::= D0 # deleting (in-charge) destructor
1204 ::= D1 # complete object (in-charge) destructor
1205 ::= D2 # base object (not-in-charge) destructor
1207 We also need to provide mangled names for the maybe-incharge
1208 destructor, so we treat it here too. mangle_decl_string will
1209 append *INTERNAL* to that, to make sure we never emit it. */
1212 write_special_name_destructor (dtor)
1215 if (DECL_DELETING_DESTRUCTOR_P (dtor))
1216 write_string ("D0");
1217 else if (DECL_COMPLETE_DESTRUCTOR_P (dtor)
1218 /* Even though we don't ever emit a definition of the
1219 old-style destructor, we still have to consider entities
1220 (like static variables) nested inside it. */
1221 || DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P (dtor))
1222 write_string ("D1");
1223 else if (DECL_BASE_DESTRUCTOR_P (dtor))
1224 write_string ("D2");
1229 /* Return the discriminator for ENTITY appearing inside
1230 FUNCTION. The discriminator is the lexical ordinal of VAR among
1231 entities with the same name in the same FUNCTION. */
1234 discriminator_for_local_entity (entity)
1240 /* Assume this is the only local entity with this name. */
1243 if (DECL_DISCRIMINATOR_P (entity) && DECL_LANG_SPECIFIC (entity))
1244 discriminator = DECL_DISCRIMINATOR (entity);
1245 else if (TREE_CODE (entity) == TYPE_DECL)
1247 /* Scan the list of local classes. */
1248 entity = TREE_TYPE (entity);
1249 for (type = &VARRAY_TREE (local_classes, 0); *type != entity; ++type)
1250 if (TYPE_IDENTIFIER (*type) == TYPE_IDENTIFIER (entity)
1251 && TYPE_CONTEXT (*type) == TYPE_CONTEXT (entity))
1255 return discriminator;
1258 /* Return the discriminator for STRING, a string literal used inside
1259 FUNCTION. The disciminator is the lexical ordinal of STRING among
1260 string literals used in FUNCTION. */
1263 discriminator_for_string_literal (function, string)
1264 tree function ATTRIBUTE_UNUSED;
1265 tree string ATTRIBUTE_UNUSED;
1267 /* For now, we don't discriminate amongst string literals. */
1271 /* <discriminator> := _ <number>
1273 The discriminator is used only for the second and later occurrences
1274 of the same name within a single function. In this case <number> is
1275 n - 2, if this is the nth occurrence, in lexical order. */
1278 write_discriminator (discriminator)
1281 /* If discriminator is zero, don't write anything. Otherwise... */
1282 if (discriminator > 0)
1285 write_unsigned_number (discriminator - 1);
1289 /* Mangle the name of a function-scope entity. FUNCTION is the
1290 FUNCTION_DECL for the enclosing function. ENTITY is the decl for
1291 the entity itself. LOCAL_ENTITY is the entity that's directly
1292 scoped in FUNCTION_DECL, either ENTITY itself or an enclosing scope
1295 <local-name> := Z <function encoding> E <entity name> [<discriminator>]
1296 := Z <function encoding> E s [<discriminator>] */
1299 write_local_name (function, local_entity, entity)
1304 MANGLE_TRACE_TREE ("local-name", entity);
1307 write_encoding (function);
1309 if (TREE_CODE (entity) == STRING_CST)
1312 write_discriminator (discriminator_for_string_literal (function,
1317 /* Now the <entity name>. Let write_name know its being called
1318 from <local-name>, so it doesn't try to process the enclosing
1319 function scope again. */
1320 write_name (entity, /*ignore_local_scope=*/1);
1321 write_discriminator (discriminator_for_local_entity (local_entity));
1325 /* Non-terminals <type> and <CV-qualifier>.
1327 <type> ::= <builtin-type>
1329 ::= <class-enum-type>
1331 ::= <pointer-to-member-type>
1332 ::= <template-param>
1335 ::= P <type> # pointer-to
1336 ::= R <type> # reference-to
1337 ::= C <type> # complex pair (C 2000)
1338 ::= G <type> # imaginary (C 2000) [not supported]
1339 ::= U <source-name> <type> # vendor extended type qualifier
1341 TYPE is a type node. */
1347 /* This gets set to non-zero if TYPE turns out to be a (possibly
1348 CV-qualified) builtin type. */
1349 int is_builtin_type = 0;
1351 MANGLE_TRACE_TREE ("type", type);
1353 if (type == error_mark_node)
1356 if (find_substitution (type))
1359 if (write_CV_qualifiers_for_type (type) > 0)
1360 /* If TYPE was CV-qualified, we just wrote the qualifiers; now
1361 mangle the unqualified type. The recursive call is needed here
1362 since both the qualified and uqualified types are substitution
1364 write_type (TYPE_MAIN_VARIANT (type));
1365 else if (TREE_CODE (type) == ARRAY_TYPE)
1366 /* It is important not to use the TYPE_MAIN_VARIANT of TYPE here
1367 so that the cv-qualification of the element type is available
1368 in write_array_type. */
1369 write_array_type (type);
1372 /* See through any typedefs. */
1373 type = TYPE_MAIN_VARIANT (type);
1375 switch (TREE_CODE (type))
1379 case INTEGER_TYPE: /* Includes wchar_t. */
1381 /* If this is a typedef, TYPE may not be one of
1382 the standard builtin type nodes, but an alias of one. Use
1383 TYPE_MAIN_VARIANT to get to the underlying builtin type. */
1384 write_builtin_type (TYPE_MAIN_VARIANT (type));
1390 write_type (TREE_TYPE (type));
1395 write_function_type (type);
1401 /* A pointer-to-member function is represented as a special
1402 RECORD_TYPE, so check for this first. */
1403 if (TYPE_PTRMEMFUNC_P (type))
1404 write_pointer_to_member_type (type);
1406 write_class_enum_type (type);
1410 case UNBOUND_CLASS_TEMPLATE:
1411 /* We handle TYPENAME_TYPEs and UNBOUND_CLASS_TEMPLATEs like
1412 ordinary nested names. */
1413 write_nested_name (TYPE_STUB_DECL (type));
1417 /* A pointer-to-member variable is represented by a POINTER_TYPE
1418 to an OFFSET_TYPE, so check for this first. */
1419 if (TYPE_PTRMEM_P (type))
1420 write_pointer_to_member_type (type);
1424 write_type (TREE_TYPE (type));
1428 case REFERENCE_TYPE:
1430 write_type (TREE_TYPE (type));
1433 case TEMPLATE_TYPE_PARM:
1434 case TEMPLATE_PARM_INDEX:
1435 write_template_param (type);
1438 case TEMPLATE_TEMPLATE_PARM:
1439 write_template_template_param (type);
1442 case BOUND_TEMPLATE_TEMPLATE_PARM:
1443 write_template_template_param (type);
1445 (TI_ARGS (TEMPLATE_TEMPLATE_PARM_TEMPLATE_INFO (type)));
1449 write_pointer_to_member_type (build_pointer_type (type));
1453 write_string ("U8__vector");
1454 write_type (TREE_TYPE (type));
1462 /* Types other than builtin types are substitution candidates. */
1463 if (!is_builtin_type)
1464 add_substitution (type);
1467 /* Non-terminal <CV-qualifiers> for type nodes. Returns the number of
1468 CV-qualifiers written for TYPE.
1470 <CV-qualifiers> ::= [r] [V] [K] */
1473 write_CV_qualifiers_for_type (type)
1476 int num_qualifiers = 0;
1478 /* The order is specified by:
1480 "In cases where multiple order-insensitive qualifiers are
1481 present, they should be ordered 'K' (closest to the base type),
1482 'V', 'r', and 'U' (farthest from the base type) ..."
1484 Note that we do not use cp_type_quals below; given "const
1485 int[3]", the "const" is emitted with the "int", not with the
1488 if (TYPE_QUALS (type) & TYPE_QUAL_RESTRICT)
1493 if (TYPE_QUALS (type) & TYPE_QUAL_VOLATILE)
1498 if (TYPE_QUALS (type) & TYPE_QUAL_CONST)
1504 return num_qualifiers;
1507 /* Non-terminal <builtin-type>.
1509 <builtin-type> ::= v # void
1514 ::= h # unsigned char
1516 ::= t # unsigned short
1518 ::= j # unsigned int
1520 ::= m # unsigned long
1521 ::= x # long long, __int64
1522 ::= y # unsigned long long, __int64
1524 ::= o # unsigned __int128
1527 ::= e # long double, __float80
1528 ::= g # __float128 [not supported]
1529 ::= u <source-name> # vendor extended type */
1532 write_builtin_type (type)
1535 switch (TREE_CODE (type))
1546 /* If this is size_t, get the underlying int type. */
1547 if (TYPE_IS_SIZETYPE (type))
1548 type = TYPE_DOMAIN (type);
1550 /* TYPE may still be wchar_t, since that isn't in
1551 integer_type_nodes. */
1552 if (type == wchar_type_node)
1554 else if (TYPE_FOR_JAVA (type))
1555 write_java_integer_type_codes (type);
1559 /* Assume TYPE is one of the shared integer type nodes. Find
1560 it in the array of these nodes. */
1562 for (itk = 0; itk < itk_none; ++itk)
1563 if (type == integer_types[itk])
1565 /* Print the corresponding single-letter code. */
1566 write_char (integer_type_codes[itk]);
1570 if (itk == itk_none)
1572 tree t = type_for_mode (TYPE_MODE (type), TREE_UNSIGNED (type));
1575 if (TYPE_PRECISION (type) == 128)
1576 write_char (TREE_UNSIGNED (type) ? 'o' : 'n');
1578 /* Couldn't find this type. */
1591 if (type == float_type_node
1592 || type == java_float_type_node)
1594 else if (type == double_type_node
1595 || type == java_double_type_node)
1597 else if (type == long_double_type_node)
1608 /* Non-terminal <function-type>. NODE is a FUNCTION_TYPE or
1609 METHOD_TYPE. The return type is mangled before the parameter
1612 <function-type> ::= F [Y] <bare-function-type> E */
1615 write_function_type (type)
1618 MANGLE_TRACE_TREE ("function-type", type);
1620 /* For a pointer to member function, the function type may have
1621 cv-qualifiers, indicating the quals for the artificial 'this'
1623 if (TREE_CODE (type) == METHOD_TYPE)
1625 /* The first parameter must be a POINTER_TYPE pointing to the
1626 `this' parameter. */
1627 tree this_type = TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (type)));
1628 write_CV_qualifiers_for_type (this_type);
1632 /* We don't track whether or not a type is `extern "C"'. Note that
1633 you can have an `extern "C"' function that does not have
1634 `extern "C"' type, and vice versa:
1636 extern "C" typedef void function_t();
1637 function_t f; // f has C++ linkage, but its type is
1640 typedef void function_t();
1641 extern "C" function_t f; // Vice versa.
1644 write_bare_function_type (type, /*include_return_type_p=*/1,
1649 /* Non-terminal <bare-function-type>. TYPE is a FUNCTION_TYPE or
1650 METHOD_TYPE. If INCLUDE_RETURN_TYPE is non-zero, the return value
1651 is mangled before the parameter types. If non-NULL, DECL is
1652 FUNCTION_DECL for the function whose type is being emitted.
1654 <bare-function-type> ::= </signature/ type>+ */
1657 write_bare_function_type (type, include_return_type_p, decl)
1659 int include_return_type_p;
1662 MANGLE_TRACE_TREE ("bare-function-type", type);
1664 /* Mangle the return type, if requested. */
1665 if (include_return_type_p)
1666 write_type (TREE_TYPE (type));
1668 /* Now mangle the types of the arguments. */
1669 write_method_parms (TYPE_ARG_TYPES (type),
1670 TREE_CODE (type) == METHOD_TYPE,
1674 /* Write the mangled representation of a method parameter list of
1675 types given in PARM_TYPES. If METHOD_P is non-zero, the function is
1676 considered a non-static method, and the this parameter is omitted.
1677 If non-NULL, DECL is the FUNCTION_DECL for the function whose
1678 parameters are being emitted. */
1681 write_method_parms (parm_types, method_p, decl)
1686 tree first_parm_type;
1687 tree parm_decl = decl ? DECL_ARGUMENTS (decl) : NULL_TREE;
1689 /* Assume this parameter type list is variable-length. If it ends
1690 with a void type, then it's not. */
1693 /* If this is a member function, skip the first arg, which is the
1695 "Member functions do not encode the type of their implicit this
1698 Similarly, there's no need to mangle artificial parameters, like
1699 the VTT parameters for constructors and destructors. */
1702 parm_types = TREE_CHAIN (parm_types);
1703 parm_decl = parm_decl ? TREE_CHAIN (parm_decl) : NULL_TREE;
1705 while (parm_decl && DECL_ARTIFICIAL (parm_decl))
1707 parm_types = TREE_CHAIN (parm_types);
1708 parm_decl = TREE_CHAIN (parm_decl);
1712 for (first_parm_type = parm_types;
1714 parm_types = TREE_CHAIN (parm_types))
1716 tree parm = TREE_VALUE (parm_types);
1717 if (parm == void_type_node)
1719 /* "Empty parameter lists, whether declared as () or
1720 conventionally as (void), are encoded with a void parameter
1722 if (parm_types == first_parm_type)
1724 /* If the parm list is terminated with a void type, it's
1727 /* A void type better be the last one. */
1728 my_friendly_assert (TREE_CHAIN (parm_types) == NULL, 20000523);
1735 /* <builtin-type> ::= z # ellipsis */
1739 /* <class-enum-type> ::= <name> */
1742 write_class_enum_type (type)
1745 write_name (TYPE_NAME (type), /*ignore_local_scope=*/0);
1748 /* Non-terminal <template-args>. ARGS is a TREE_VEC of template
1751 <template-args> ::= I <template-arg>+ E */
1754 write_template_args (args)
1758 int length = TREE_VEC_LENGTH (args);
1760 MANGLE_TRACE_TREE ("template-args", args);
1762 my_friendly_assert (length > 0, 20000422);
1764 if (TREE_CODE (TREE_VEC_ELT (args, 0)) == TREE_VEC)
1766 /* We have nested template args. We want the innermost template
1768 args = TREE_VEC_ELT (args, length - 1);
1769 length = TREE_VEC_LENGTH (args);
1773 for (i = 0; i < length; ++i)
1774 write_template_arg (TREE_VEC_ELT (args, i));
1778 /* <expression> ::= <unary operator-name> <expression>
1779 ::= <binary operator-name> <expression> <expression>
1782 <expr-primary> ::= <template-param>
1783 ::= L <type> <value number> E # literal
1784 ::= L <mangled-name> E # external name */
1787 write_expression (expr)
1790 enum tree_code code;
1792 code = TREE_CODE (expr);
1794 /* Handle pointers-to-members by making them look like expression
1796 if (code == PTRMEM_CST)
1798 expr = build_nt (ADDR_EXPR,
1799 build_nt (SCOPE_REF,
1800 PTRMEM_CST_CLASS (expr),
1801 PTRMEM_CST_MEMBER (expr)));
1802 code = TREE_CODE (expr);
1805 /* Skip NOP_EXPRs. They can occur when (say) a pointer argument
1806 is converted (via qualification conversions) to another
1808 while (TREE_CODE (expr) == NOP_EXPR
1809 || TREE_CODE (expr) == NON_LVALUE_EXPR)
1811 expr = TREE_OPERAND (expr, 0);
1812 code = TREE_CODE (expr);
1815 /* Handle template parameters. */
1816 if (code == TEMPLATE_TYPE_PARM
1817 || code == TEMPLATE_TEMPLATE_PARM
1818 || code == BOUND_TEMPLATE_TEMPLATE_PARM
1819 || code == TEMPLATE_PARM_INDEX)
1820 write_template_param (expr);
1821 /* Handle literals. */
1822 else if (TREE_CODE_CLASS (code) == 'c')
1823 write_template_arg_literal (expr);
1824 else if (DECL_P (expr))
1827 write_mangled_name (expr);
1830 else if (TREE_CODE (expr) == SIZEOF_EXPR
1831 && TYPE_P (TREE_OPERAND (expr, 0)))
1833 write_string ("st");
1834 write_type (TREE_OPERAND (expr, 0));
1840 /* When we bind a variable or function to a non-type template
1841 argument with reference type, we create an ADDR_EXPR to show
1842 the fact that the entity's address has been taken. But, we
1843 don't actually want to output a mangling code for the `&'. */
1844 if (TREE_CODE (expr) == ADDR_EXPR
1846 && TREE_CODE (TREE_TYPE (expr)) == REFERENCE_TYPE)
1848 expr = TREE_OPERAND (expr, 0);
1851 write_expression (expr);
1855 code = TREE_CODE (expr);
1858 /* If it wasn't any of those, recursively expand the expression. */
1859 write_string (operator_name_info[(int) code].mangled_name);
1864 write_type (TREE_TYPE (expr));
1865 write_expression (TREE_VALUE (TREE_OPERAND (expr, 0)));
1868 case STATIC_CAST_EXPR:
1869 case CONST_CAST_EXPR:
1870 write_type (TREE_TYPE (expr));
1871 write_expression (TREE_OPERAND (expr, 0));
1875 /* Handle pointers-to-members specially. */
1877 write_type (TREE_OPERAND (expr, 0));
1878 if (TREE_CODE (TREE_OPERAND (expr, 1)) == IDENTIFIER_NODE)
1879 write_source_name (TREE_OPERAND (expr, 1));
1881 write_encoding (TREE_OPERAND (expr, 1));
1885 for (i = 0; i < TREE_CODE_LENGTH (code); ++i)
1886 write_expression (TREE_OPERAND (expr, i));
1891 /* Literal subcase of non-terminal <template-arg>.
1893 "Literal arguments, e.g. "A<42L>", are encoded with their type
1894 and value. Negative integer values are preceded with "n"; for
1895 example, "A<-42L>" becomes "1AILln42EE". The bool value false is
1896 encoded as 0, true as 1. If floating-point arguments are accepted
1897 as an extension, their values should be encoded using a
1898 fixed-length lowercase hexadecimal string corresponding to the
1899 internal representation (IEEE on IA-64), high-order bytes first,
1900 without leading zeroes. For example: "Lfbff000000E" is -1.0f." */
1903 write_template_arg_literal (value)
1906 tree type = TREE_TYPE (value);
1910 if (TREE_CODE (value) == CONST_DECL)
1911 write_integer_cst (DECL_INITIAL (value));
1912 else if (TREE_CODE (value) == INTEGER_CST)
1914 if (same_type_p (type, boolean_type_node))
1916 if (value == boolean_false_node || integer_zerop (value))
1917 write_unsigned_number (0);
1918 else if (value == boolean_true_node)
1919 write_unsigned_number (1);
1924 write_integer_cst (value);
1926 else if (TREE_CODE (value) == REAL_CST)
1928 #ifdef CROSS_COMPILE
1929 static int explained;
1933 sorry ("real-valued template parameters when cross-compiling");
1938 for (i = 0; i < sizeof (TREE_REAL_CST (value)); ++i)
1939 write_number (((unsigned char *)
1940 &TREE_REAL_CST (value))[i],
1951 /* Non-terminal <tempalate-arg>.
1953 <template-arg> ::= <type> # type
1954 ::= L <type> </value/ number> E # literal
1955 ::= LZ <name> E # external name
1956 ::= X <expression> E # expression */
1959 write_template_arg (node)
1962 enum tree_code code = TREE_CODE (node);
1964 MANGLE_TRACE_TREE ("template-arg", node);
1966 /* A template template paramter's argument list contains TREE_LIST
1967 nodes of which the value field is the the actual argument. */
1968 if (code == TREE_LIST)
1970 node = TREE_VALUE (node);
1971 /* If it's a decl, deal with its type instead. */
1974 node = TREE_TYPE (node);
1975 code = TREE_CODE (node);
1981 else if (code == TEMPLATE_DECL)
1982 /* A template appearing as a template arg is a template template arg. */
1983 write_template_template_arg (node);
1984 else if (DECL_P (node))
1988 write_encoding (node);
1991 else if (TREE_CODE_CLASS (code) == 'c' && code != PTRMEM_CST)
1992 write_template_arg_literal (node);
1995 /* Template arguments may be expressions. */
1997 write_expression (node);
2002 /* <template-template-arg>
2004 ::= <substitution> */
2007 write_template_template_arg (tree decl)
2009 MANGLE_TRACE_TREE ("template-template-arg", decl);
2011 if (find_substitution (decl))
2013 write_name (decl, /*ignore_local_scope=*/0);
2014 add_substitution (decl);
2018 /* Non-terminal <array-type>. TYPE is an ARRAY_TYPE.
2020 <array-type> ::= A [</dimension/ number>] _ </element/ type>
2021 ::= A <expression> _ </element/ type>
2023 "Array types encode the dimension (number of elements) and the
2024 element type. For variable length arrays, the dimension (but not
2025 the '_' separator) is omitted." */
2028 write_array_type (type)
2032 if (TYPE_DOMAIN (type))
2037 index_type = TYPE_DOMAIN (type);
2038 /* The INDEX_TYPE gives the upper and lower bounds of the
2040 max = TYPE_MAX_VALUE (index_type);
2041 if (TREE_CODE (max) == INTEGER_CST)
2043 /* The ABI specifies that we should mangle the number of
2044 elements in the array, not the largest allowed index. */
2045 max = size_binop (PLUS_EXPR, max, size_one_node);
2046 write_unsigned_number (tree_low_cst (max, 1));
2049 write_expression (TREE_OPERAND (max, 0));
2052 write_type (TREE_TYPE (type));
2055 /* Non-terminal <pointer-to-member-type> for pointer-to-member
2056 variables. TYPE is a pointer-to-member POINTER_TYPE.
2058 <pointer-to-member-type> ::= M </class/ type> </member/ type> */
2061 write_pointer_to_member_type (type)
2065 write_type (TYPE_PTRMEM_CLASS_TYPE (type));
2066 write_type (TYPE_PTRMEM_POINTED_TO_TYPE (type));
2069 /* Non-terminal <template-param>. PARM is a TEMPLATE_TYPE_PARM,
2070 TEMPLATE_TEMPLATE_PARM, BOUND_TEMPLATE_TEMPLATE_PARM or a
2071 TEMPLATE_PARM_INDEX.
2073 <template-param> ::= T </parameter/ number> _ */
2076 write_template_param (parm)
2081 MANGLE_TRACE_TREE ("template-parm", parm);
2083 switch (TREE_CODE (parm))
2085 case TEMPLATE_TYPE_PARM:
2086 case TEMPLATE_TEMPLATE_PARM:
2087 case BOUND_TEMPLATE_TEMPLATE_PARM:
2088 parm_index = TEMPLATE_TYPE_IDX (parm);
2091 case TEMPLATE_PARM_INDEX:
2092 parm_index = TEMPLATE_PARM_IDX (parm);
2100 /* NUMBER as it appears in the mangling is (-1)-indexed, with the
2101 earliest template param denoted by `_'. */
2103 write_unsigned_number (parm_index - 1);
2107 /* <template-template-param>
2108 ::= <template-param>
2109 ::= <substitution> */
2112 write_template_template_param (parm)
2115 tree template = NULL_TREE;
2117 /* PARM, a TEMPLATE_TEMPLATE_PARM, is an instantiation of the
2118 template template parameter. The substitution candidate here is
2119 only the template. */
2120 if (TREE_CODE (parm) == BOUND_TEMPLATE_TEMPLATE_PARM)
2123 = TI_TEMPLATE (TEMPLATE_TEMPLATE_PARM_TEMPLATE_INFO (parm));
2124 if (find_substitution (template))
2128 /* <template-param> encodes only the template parameter position,
2129 not its template arguments, which is fine here. */
2130 write_template_param (parm);
2132 add_substitution (template);
2135 /* Non-terminal <substitution>.
2137 <substitution> ::= S <seq-id> _
2141 write_substitution (seq_id)
2144 MANGLE_TRACE ("substitution", "");
2148 write_number (seq_id - 1, /*unsigned=*/1, 36);
2152 /* Start mangling a new name or type. */
2157 obstack_free (&G.name_obstack, obstack_base (&G.name_obstack));
2160 /* Done with mangling. Return the generated mangled name. */
2162 static inline const char *
2165 /* Clear all the substitutions. */
2166 VARRAY_POP_ALL (G.substitutions);
2168 /* Null-terminate the string. */
2171 return (const char *) obstack_base (&G.name_obstack);
2174 /* Initialize data structures for mangling. */
2179 gcc_obstack_init (&G.name_obstack);
2180 VARRAY_TREE_INIT (G.substitutions, 1, "mangling substitutions");
2182 /* Cache these identifiers for quick comparison when checking for
2183 standard substitutions. */
2184 subst_identifiers[SUBID_ALLOCATOR] = get_identifier ("allocator");
2185 subst_identifiers[SUBID_BASIC_STRING] = get_identifier ("basic_string");
2186 subst_identifiers[SUBID_CHAR_TRAITS] = get_identifier ("char_traits");
2187 subst_identifiers[SUBID_BASIC_ISTREAM] = get_identifier ("basic_istream");
2188 subst_identifiers[SUBID_BASIC_OSTREAM] = get_identifier ("basic_ostream");
2189 subst_identifiers[SUBID_BASIC_IOSTREAM] = get_identifier ("basic_iostream");
2192 /* Generate the mangled name of DECL. */
2195 mangle_decl_string (decl)
2202 if (TREE_CODE (decl) == TYPE_DECL)
2203 write_type (TREE_TYPE (decl));
2204 else if (/* The names of `extern "C"' functions are not mangled. */
2205 (DECL_EXTERN_C_FUNCTION_P (decl)
2206 /* But overloaded operator names *are* mangled. */
2207 && !DECL_OVERLOADED_OPERATOR_P (decl))
2208 /* The names of global variables aren't mangled either. */
2209 || (TREE_CODE (decl) == VAR_DECL
2210 && CP_DECL_CONTEXT (decl) == global_namespace)
2211 /* And neither are `extern "C"' variables. */
2212 || (TREE_CODE (decl) == VAR_DECL
2213 && DECL_EXTERN_C_P (decl)))
2214 write_string (IDENTIFIER_POINTER (DECL_NAME (decl)));
2217 write_mangled_name (decl);
2218 if (DECL_LANG_SPECIFIC (decl)
2219 && (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P (decl)
2220 || DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl)))
2221 /* We need a distinct mangled name for these entities, but
2222 we should never actually output it. So, we append some
2223 characters the assembler won't like. */
2224 write_string (" *INTERNAL* ");
2227 result = finish_mangling ();
2229 fprintf (stderr, "mangle_decl_string = '%s'\n\n", result);
2233 /* Create an identifier for the external mangled name of DECL. */
2239 tree id = get_identifier (mangle_decl_string (decl));
2241 SET_DECL_ASSEMBLER_NAME (decl, id);
2244 /* Generate the mangled representation of TYPE. */
2247 mangle_type_string (type)
2254 result = finish_mangling ();
2256 fprintf (stderr, "mangle_type_string = '%s'\n\n", result);
2260 /* Create an identifier for the mangled representation of TYPE. */
2266 return get_identifier (mangle_type_string (type));
2269 /* Create an identifier for the mangled name of a special component
2270 for belonging to TYPE. CODE is the ABI-specified code for this
2274 mangle_special_for_type (type, code)
2280 /* We don't have an actual decl here for the special component, so
2281 we can't just process the <encoded-name>. Instead, fake it. */
2284 /* Start the mangling. */
2285 write_string ("_Z");
2286 write_string (code);
2290 result = finish_mangling ();
2293 fprintf (stderr, "mangle_special_for_type = %s\n\n", result);
2295 return get_identifier (result);
2298 /* Create an identifier for the mangled representation of the typeinfo
2299 structure for TYPE. */
2302 mangle_typeinfo_for_type (type)
2305 return mangle_special_for_type (type, "TI");
2308 /* Create an identifier for the mangled name of the NTBS containing
2309 the mangled name of TYPE. */
2312 mangle_typeinfo_string_for_type (type)
2315 return mangle_special_for_type (type, "TS");
2318 /* Create an identifier for the mangled name of the vtable for TYPE. */
2321 mangle_vtbl_for_type (type)
2324 return mangle_special_for_type (type, "TV");
2327 /* Returns an identifier for the mangled name of the VTT for TYPE. */
2330 mangle_vtt_for_type (type)
2333 return mangle_special_for_type (type, "TT");
2336 /* Return an identifier for a construction vtable group. TYPE is
2337 the most derived class in the hierarchy; BINFO is the base
2338 subobject for which this construction vtable group will be used.
2340 This mangling isn't part of the ABI specification; in the ABI
2341 specification, the vtable group is dumped in the same COMDAT as the
2342 main vtable, and is referenced only from that vtable, so it doesn't
2343 need an external name. For binary formats without COMDAT sections,
2344 though, we need external names for the vtable groups.
2346 We use the production
2348 <special-name> ::= CT <type> <offset number> _ <base type> */
2351 mangle_ctor_vtbl_for_type (type, binfo)
2359 write_string ("_Z");
2360 write_string ("TC");
2362 write_integer_cst (BINFO_OFFSET (binfo));
2364 write_type (BINFO_TYPE (binfo));
2366 result = finish_mangling ();
2368 fprintf (stderr, "mangle_ctor_vtbl_for_type = %s\n\n", result);
2369 return get_identifier (result);
2372 /* Return an identifier for the mangled name of a thunk to FN_DECL.
2373 OFFSET is the initial adjustment to this used to find the vptr. If
2374 VCALL_OFFSET is non-NULL, this is a virtual thunk, and it is the
2375 vtbl offset in bytes.
2377 <special-name> ::= Th <offset number> _ <base encoding>
2378 ::= Tv <offset number> _ <vcall offset number> _
2383 mangle_thunk (fn_decl, offset, vcall_offset)
2392 write_string ("_Z");
2393 /* The <special-name> for virtual thunks is Tv, for non-virtual
2396 if (vcall_offset != 0)
2401 /* For either flavor, write the offset to this. */
2402 write_integer_cst (offset);
2405 /* For a virtual thunk, add the vcall offset. */
2408 /* Virtual thunk. Write the vcall offset and base type name. */
2409 write_integer_cst (vcall_offset);
2414 write_encoding (fn_decl);
2416 result = finish_mangling ();
2418 fprintf (stderr, "mangle_thunk = %s\n\n", result);
2419 return get_identifier (result);
2422 /* Return an identifier for the mangled unqualified name for a
2423 conversion operator to TYPE. This mangling is not specified by the
2424 ABI spec; it is only used internally. */
2427 mangle_conv_op_name_for_type (type)
2432 /* Build the mangling for TYPE. */
2433 const char *mangled_type = mangle_type_string (type);
2434 /* Allocate a temporary buffer for the complete name. */
2435 char *op_name = concat ("operator ", mangled_type, NULL);
2436 /* Find or create an identifier. */
2437 identifier = get_identifier (op_name);
2438 /* Done with the temporary buffer. */
2440 /* Set bits on the identifier so we know later it's a conversion. */
2441 IDENTIFIER_OPNAME_P (identifier) = 1;
2442 IDENTIFIER_TYPENAME_P (identifier) = 1;
2443 /* Hang TYPE off the identifier so it can be found easily later when
2444 performing conversions. */
2445 TREE_TYPE (identifier) = type;
2450 /* Return an identifier for the name of an initialization guard
2451 variable for indicated VARIABLE. */
2454 mangle_guard_variable (variable)
2458 write_string ("_ZGV");
2459 if (strncmp (IDENTIFIER_POINTER (DECL_NAME (variable)), "_ZGR", 4) == 0)
2460 /* The name of a guard variable for a reference temporary should refer
2461 to the reference, not the temporary. */
2462 write_string (IDENTIFIER_POINTER (DECL_NAME (variable)) + 4);
2464 write_name (variable, /*ignore_local_scope=*/0);
2465 return get_identifier (finish_mangling ());
2468 /* Return an identifier for the name of a temporary variable used to
2469 initialize a static reference. This isn't part of the ABI, but we might
2470 as well call them something readable. */
2473 mangle_ref_init_variable (variable)
2477 write_string ("_ZGR");
2478 write_name (variable, /*ignore_local_scope=*/0);
2479 return get_identifier (finish_mangling ());
2483 /* Foreign language type mangling section. */
2485 /* How to write the type codes for the integer Java type. */
2488 write_java_integer_type_codes (type)
2491 if (type == java_int_type_node)
2493 else if (type == java_short_type_node)
2495 else if (type == java_byte_type_node)
2497 else if (type == java_char_type_node)
2499 else if (type == java_long_type_node)
2501 else if (type == java_boolean_type_node)