1 /* Name mangling for the 3.0 C++ ABI.
2 Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009
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 3, 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 COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
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 */
50 #include "coretypes.h"
62 /* Debugging support. */
64 /* Define DEBUG_MANGLE to enable very verbose trace messages. */
66 #define DEBUG_MANGLE 0
69 /* Macros for tracing the write_* functions. */
71 # define MANGLE_TRACE(FN, INPUT) \
72 fprintf (stderr, " %-24s: %-24s\n", (FN), (INPUT))
73 # define MANGLE_TRACE_TREE(FN, NODE) \
74 fprintf (stderr, " %-24s: %-24s (%p)\n", \
75 (FN), tree_code_name[TREE_CODE (NODE)], (void *) (NODE))
77 # define MANGLE_TRACE(FN, INPUT)
78 # define MANGLE_TRACE_TREE(FN, NODE)
81 /* Nonzero if NODE is a class template-id. We can't rely on
82 CLASSTYPE_USE_TEMPLATE here because of tricky bugs in the parser
83 that hard to distinguish A<T> from A, where A<T> is the type as
84 instantiated outside of the template, and A is the type used
85 without parameters inside the template. */
86 #define CLASSTYPE_TEMPLATE_ID_P(NODE) \
87 (TYPE_LANG_SPECIFIC (NODE) != NULL \
88 && (TREE_CODE (NODE) == BOUND_TEMPLATE_TEMPLATE_PARM \
89 || (CLASSTYPE_TEMPLATE_INFO (NODE) != NULL \
90 && (PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (NODE))))))
92 /* Things we only need one of. This module is not reentrant. */
93 typedef struct GTY(()) globals {
94 /* An array of the current substitution candidates, in the order
96 VEC(tree,gc) *substitutions;
98 /* The entity that is being mangled. */
99 tree GTY ((skip)) entity;
101 /* True if the mangling will be different in a future version of the
103 bool need_abi_warning;
106 static GTY (()) globals G;
108 /* The obstack on which we build mangled names. */
109 static struct obstack *mangle_obstack;
111 /* The obstack on which we build mangled names that are not going to
112 be IDENTIFIER_NODEs. */
113 static struct obstack name_obstack;
115 /* The first object on the name_obstack; we use this to free memory
116 allocated on the name_obstack. */
117 static void *name_base;
119 /* Indices into subst_identifiers. These are identifiers used in
120 special substitution rules. */
128 SUBID_BASIC_IOSTREAM,
131 substitution_identifier_index_t;
133 /* For quick substitution checks, look up these common identifiers
135 static GTY(()) tree subst_identifiers[SUBID_MAX];
137 /* Single-letter codes for builtin integer types, defined in
138 <builtin-type>. These are indexed by integer_type_kind values. */
140 integer_type_codes[itk_none] =
143 'a', /* itk_signed_char */
144 'h', /* itk_unsigned_char */
146 't', /* itk_unsigned_short */
148 'j', /* itk_unsigned_int */
150 'm', /* itk_unsigned_long */
151 'x', /* itk_long_long */
152 'y' /* itk_unsigned_long_long */
155 static int decl_is_template_id (const tree, tree* const);
157 /* Functions for handling substitutions. */
159 static inline tree canonicalize_for_substitution (tree);
160 static void add_substitution (tree);
161 static inline int is_std_substitution (const tree,
162 const substitution_identifier_index_t);
163 static inline int is_std_substitution_char (const tree,
164 const substitution_identifier_index_t);
165 static int find_substitution (tree);
166 static void mangle_call_offset (const tree, const tree);
168 /* Functions for emitting mangled representations of things. */
170 static void write_mangled_name (const tree, bool);
171 static void write_encoding (const tree);
172 static void write_name (tree, const int);
173 static void write_unscoped_name (const tree);
174 static void write_unscoped_template_name (const tree);
175 static void write_nested_name (const tree);
176 static void write_prefix (const tree);
177 static void write_template_prefix (const tree);
178 static void write_unqualified_name (const tree);
179 static void write_conversion_operator_name (const tree);
180 static void write_source_name (tree);
181 static void write_unnamed_type_name (const tree);
182 static void write_closure_type_name (const tree);
183 static int hwint_to_ascii (unsigned HOST_WIDE_INT, const unsigned int, char *,
185 static void write_number (unsigned HOST_WIDE_INT, const int,
187 static void write_compact_number (int num);
188 static void write_integer_cst (const tree);
189 static void write_real_cst (const tree);
190 static void write_identifier (const char *);
191 static void write_special_name_constructor (const tree);
192 static void write_special_name_destructor (const tree);
193 static void write_type (tree);
194 static int write_CV_qualifiers_for_type (const tree);
195 static void write_builtin_type (tree);
196 static void write_function_type (const tree);
197 static void write_bare_function_type (const tree, const int, const tree);
198 static void write_method_parms (tree, const int, const tree);
199 static void write_class_enum_type (const tree);
200 static void write_template_args (tree);
201 static void write_expression (tree);
202 static void write_template_arg_literal (const tree);
203 static void write_template_arg (tree);
204 static void write_template_template_arg (const tree);
205 static void write_array_type (const tree);
206 static void write_pointer_to_member_type (const tree);
207 static void write_template_param (const tree);
208 static void write_template_template_param (const tree);
209 static void write_substitution (const int);
210 static int discriminator_for_local_entity (tree);
211 static int discriminator_for_string_literal (tree, tree);
212 static void write_discriminator (const int);
213 static void write_local_name (tree, const tree, const tree);
214 static void dump_substitution_candidates (void);
215 static tree mangle_decl_string (const tree);
216 static int local_class_index (tree);
218 /* Control functions. */
220 static inline void start_mangling (const tree);
221 static inline const char *finish_mangling (const bool);
222 static tree mangle_special_for_type (const tree, const char *);
224 /* Foreign language functions. */
226 static void write_java_integer_type_codes (const tree);
228 /* Append a single character to the end of the mangled
230 #define write_char(CHAR) \
231 obstack_1grow (mangle_obstack, (CHAR))
233 /* Append a sized buffer to the end of the mangled representation. */
234 #define write_chars(CHAR, LEN) \
235 obstack_grow (mangle_obstack, (CHAR), (LEN))
237 /* Append a NUL-terminated string to the end of the mangled
239 #define write_string(STRING) \
240 obstack_grow (mangle_obstack, (STRING), strlen (STRING))
242 /* Nonzero if NODE1 and NODE2 are both TREE_LIST nodes and have the
243 same purpose (context, which may be a type) and value (template
244 decl). See write_template_prefix for more information on what this
246 #define NESTED_TEMPLATE_MATCH(NODE1, NODE2) \
247 (TREE_CODE (NODE1) == TREE_LIST \
248 && TREE_CODE (NODE2) == TREE_LIST \
249 && ((TYPE_P (TREE_PURPOSE (NODE1)) \
250 && same_type_p (TREE_PURPOSE (NODE1), TREE_PURPOSE (NODE2))) \
251 || TREE_PURPOSE (NODE1) == TREE_PURPOSE (NODE2)) \
252 && TREE_VALUE (NODE1) == TREE_VALUE (NODE2))
254 /* Write out an unsigned quantity in base 10. */
255 #define write_unsigned_number(NUMBER) \
256 write_number ((NUMBER), /*unsigned_p=*/1, 10)
258 /* If DECL is a template instance, return nonzero and, if
259 TEMPLATE_INFO is non-NULL, set *TEMPLATE_INFO to its template info.
260 Otherwise return zero. */
263 decl_is_template_id (const tree decl, tree* const template_info)
265 if (TREE_CODE (decl) == TYPE_DECL)
267 /* TYPE_DECLs are handled specially. Look at its type to decide
268 if this is a template instantiation. */
269 const tree type = TREE_TYPE (decl);
271 if (CLASS_TYPE_P (type) && CLASSTYPE_TEMPLATE_ID_P (type))
273 if (template_info != NULL)
274 /* For a templated TYPE_DECL, the template info is hanging
276 *template_info = TYPE_TEMPLATE_INFO (type);
282 /* Check if this is a primary template. */
283 if (DECL_LANG_SPECIFIC (decl) != NULL
284 && DECL_USE_TEMPLATE (decl)
285 && PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl))
286 && TREE_CODE (decl) != TEMPLATE_DECL)
288 if (template_info != NULL)
289 /* For most templated decls, the template info is hanging
291 *template_info = DECL_TEMPLATE_INFO (decl);
296 /* It's not a template id. */
300 /* Produce debugging output of current substitution candidates. */
303 dump_substitution_candidates (void)
308 fprintf (stderr, " ++ substitutions ");
309 for (i = 0; VEC_iterate (tree, G.substitutions, i, el); ++i)
311 const char *name = "???";
314 fprintf (stderr, " ");
316 name = IDENTIFIER_POINTER (DECL_NAME (el));
317 else if (TREE_CODE (el) == TREE_LIST)
318 name = IDENTIFIER_POINTER (DECL_NAME (TREE_VALUE (el)));
319 else if (TYPE_NAME (el))
320 name = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (el)));
321 fprintf (stderr, " S%d_ = ", i - 1);
323 (CP_TYPE_RESTRICT_P (el)
324 || CP_TYPE_VOLATILE_P (el)
325 || CP_TYPE_CONST_P (el)))
326 fprintf (stderr, "CV-");
327 fprintf (stderr, "%s (%s at %p)\n",
328 name, tree_code_name[TREE_CODE (el)], (void *) el);
332 /* Both decls and types can be substitution candidates, but sometimes
333 they refer to the same thing. For instance, a TYPE_DECL and
334 RECORD_TYPE for the same class refer to the same thing, and should
335 be treated accordingly in substitutions. This function returns a
336 canonicalized tree node representing NODE that is used when adding
337 and substitution candidates and finding matches. */
340 canonicalize_for_substitution (tree node)
342 /* For a TYPE_DECL, use the type instead. */
343 if (TREE_CODE (node) == TYPE_DECL)
344 node = TREE_TYPE (node);
346 && TYPE_CANONICAL (node) != node
347 && TYPE_MAIN_VARIANT (node) != node)
348 /* Here we want to strip the topmost typedef only.
349 We need to do that so is_std_substitution can do proper
351 node = cp_build_qualified_type (TYPE_MAIN_VARIANT (node),
352 cp_type_quals (node));
356 /* Add NODE as a substitution candidate. NODE must not already be on
357 the list of candidates. */
360 add_substitution (tree node)
365 fprintf (stderr, " ++ add_substitution (%s at %10p)\n",
366 tree_code_name[TREE_CODE (node)], (void *) node);
368 /* Get the canonicalized substitution candidate for NODE. */
369 c = canonicalize_for_substitution (node);
370 if (DEBUG_MANGLE && c != node)
371 fprintf (stderr, " ++ using candidate (%s at %10p)\n",
372 tree_code_name[TREE_CODE (node)], (void *) node);
376 /* Make sure NODE isn't already a candidate. */
381 for (i = 0; VEC_iterate (tree, G.substitutions, i, candidate); i++)
383 gcc_assert (!(DECL_P (node) && node == candidate));
384 gcc_assert (!(TYPE_P (node) && TYPE_P (candidate)
385 && same_type_p (node, candidate)));
388 #endif /* ENABLE_CHECKING */
390 /* Put the decl onto the varray of substitution candidates. */
391 VEC_safe_push (tree, gc, G.substitutions, node);
394 dump_substitution_candidates ();
397 /* Helper function for find_substitution. Returns nonzero if NODE,
398 which may be a decl or a CLASS_TYPE, is a template-id with template
399 name of substitution_index[INDEX] in the ::std namespace. */
402 is_std_substitution (const tree node,
403 const substitution_identifier_index_t index)
410 type = TREE_TYPE (node);
413 else if (CLASS_TYPE_P (node))
416 decl = TYPE_NAME (node);
419 /* These are not the droids you're looking for. */
422 return (DECL_NAMESPACE_STD_P (CP_DECL_CONTEXT (decl))
423 && TYPE_LANG_SPECIFIC (type)
424 && TYPE_TEMPLATE_INFO (type)
425 && (DECL_NAME (TYPE_TI_TEMPLATE (type))
426 == subst_identifiers[index]));
429 /* Helper function for find_substitution. Returns nonzero if NODE,
430 which may be a decl or a CLASS_TYPE, is the template-id
431 ::std::identifier<char>, where identifier is
432 substitution_index[INDEX]. */
435 is_std_substitution_char (const tree node,
436 const substitution_identifier_index_t index)
439 /* Check NODE's name is ::std::identifier. */
440 if (!is_std_substitution (node, index))
442 /* Figure out its template args. */
444 args = DECL_TI_ARGS (node);
445 else if (CLASS_TYPE_P (node))
446 args = CLASSTYPE_TI_ARGS (node);
448 /* Oops, not a template. */
450 /* NODE's template arg list should be <char>. */
452 TREE_VEC_LENGTH (args) == 1
453 && TREE_VEC_ELT (args, 0) == char_type_node;
456 /* Check whether a substitution should be used to represent NODE in
459 First, check standard special-case substitutions.
461 <substitution> ::= St
468 # ::std::basic_string
471 # ::std::basic_string<char,
472 ::std::char_traits<char>,
473 ::std::allocator<char> >
476 # ::std::basic_istream<char, ::std::char_traits<char> >
479 # ::std::basic_ostream<char, ::std::char_traits<char> >
482 # ::std::basic_iostream<char, ::std::char_traits<char> >
484 Then examine the stack of currently available substitution
485 candidates for entities appearing earlier in the same mangling
487 If a substitution is found, write its mangled representation and
488 return nonzero. If none is found, just return zero. */
491 find_substitution (tree node)
494 const int size = VEC_length (tree, G.substitutions);
499 fprintf (stderr, " ++ find_substitution (%s at %p)\n",
500 tree_code_name[TREE_CODE (node)], (void *) node);
502 /* Obtain the canonicalized substitution representation for NODE.
503 This is what we'll compare against. */
504 node = canonicalize_for_substitution (node);
506 /* Check for builtin substitutions. */
508 decl = TYPE_P (node) ? TYPE_NAME (node) : node;
509 type = TYPE_P (node) ? node : TREE_TYPE (node);
511 /* Check for std::allocator. */
513 && is_std_substitution (decl, SUBID_ALLOCATOR)
514 && !CLASSTYPE_USE_TEMPLATE (TREE_TYPE (decl)))
520 /* Check for std::basic_string. */
521 if (decl && is_std_substitution (decl, SUBID_BASIC_STRING))
525 /* If this is a type (i.e. a fully-qualified template-id),
527 std::basic_string <char,
528 std::char_traits<char>,
529 std::allocator<char> > . */
530 if (cp_type_quals (type) == TYPE_UNQUALIFIED
531 && CLASSTYPE_USE_TEMPLATE (type))
533 tree args = CLASSTYPE_TI_ARGS (type);
534 if (TREE_VEC_LENGTH (args) == 3
535 && same_type_p (TREE_VEC_ELT (args, 0), char_type_node)
536 && is_std_substitution_char (TREE_VEC_ELT (args, 1),
538 && is_std_substitution_char (TREE_VEC_ELT (args, 2),
547 /* Substitute for the template name only if this isn't a type. */
554 /* Check for basic_{i,o,io}stream. */
556 && cp_type_quals (type) == TYPE_UNQUALIFIED
557 && CLASS_TYPE_P (type)
558 && CLASSTYPE_USE_TEMPLATE (type)
559 && CLASSTYPE_TEMPLATE_INFO (type) != NULL)
561 /* First, check for the template
562 args <char, std::char_traits<char> > . */
563 tree args = CLASSTYPE_TI_ARGS (type);
564 if (TREE_VEC_LENGTH (args) == 2
565 && TYPE_P (TREE_VEC_ELT (args, 0))
566 && same_type_p (TREE_VEC_ELT (args, 0), char_type_node)
567 && is_std_substitution_char (TREE_VEC_ELT (args, 1),
570 /* Got them. Is this basic_istream? */
571 if (is_std_substitution (decl, SUBID_BASIC_ISTREAM))
576 /* Or basic_ostream? */
577 else if (is_std_substitution (decl, SUBID_BASIC_OSTREAM))
582 /* Or basic_iostream? */
583 else if (is_std_substitution (decl, SUBID_BASIC_IOSTREAM))
591 /* Check for namespace std. */
592 if (decl && DECL_NAMESPACE_STD_P (decl))
598 /* Now check the list of available substitutions for this mangling
600 for (i = 0; i < size; ++i)
602 tree candidate = VEC_index (tree, G.substitutions, i);
603 /* NODE is a matched to a candidate if it's the same decl node or
604 if it's the same type. */
605 if (decl == candidate
606 || (TYPE_P (candidate) && type && TYPE_P (type)
607 && same_type_p (type, candidate))
608 || NESTED_TEMPLATE_MATCH (node, candidate))
610 write_substitution (i);
615 /* No substitution found. */
620 /* TOP_LEVEL is true, if this is being called at outermost level of
621 mangling. It should be false when mangling a decl appearing in an
622 expression within some other mangling.
624 <mangled-name> ::= _Z <encoding> */
627 write_mangled_name (const tree decl, bool top_level)
629 MANGLE_TRACE_TREE ("mangled-name", decl);
631 if (/* The names of `extern "C"' functions are not mangled. */
632 DECL_EXTERN_C_FUNCTION_P (decl)
633 /* But overloaded operator names *are* mangled. */
634 && !DECL_OVERLOADED_OPERATOR_P (decl))
639 write_string (IDENTIFIER_POINTER (DECL_NAME (decl)));
642 /* The standard notes: "The <encoding> of an extern "C"
643 function is treated like global-scope data, i.e. as its
644 <source-name> without a type." We cannot write
645 overloaded operators that way though, because it contains
646 characters invalid in assembler. */
647 if (abi_version_at_least (2))
650 G.need_abi_warning = true;
651 write_source_name (DECL_NAME (decl));
654 else if (TREE_CODE (decl) == VAR_DECL
655 /* The names of non-static global variables aren't mangled. */
656 && DECL_EXTERNAL_LINKAGE_P (decl)
657 && (CP_DECL_CONTEXT (decl) == global_namespace
658 /* And neither are `extern "C"' variables. */
659 || DECL_EXTERN_C_P (decl)))
661 if (top_level || abi_version_at_least (2))
665 G.need_abi_warning = true;
673 write_encoding (decl);
674 if (DECL_LANG_SPECIFIC (decl)
675 && (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P (decl)
676 || DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl)))
677 /* We need a distinct mangled name for these entities, but
678 we should never actually output it. So, we append some
679 characters the assembler won't like. */
680 write_string (" *INTERNAL* ");
684 /* <encoding> ::= <function name> <bare-function-type>
688 write_encoding (const tree decl)
690 MANGLE_TRACE_TREE ("encoding", decl);
692 if (DECL_LANG_SPECIFIC (decl) && DECL_EXTERN_C_FUNCTION_P (decl))
694 /* For overloaded operators write just the mangled name
695 without arguments. */
696 if (DECL_OVERLOADED_OPERATOR_P (decl))
697 write_name (decl, /*ignore_local_scope=*/0);
699 write_source_name (DECL_NAME (decl));
703 write_name (decl, /*ignore_local_scope=*/0);
704 if (TREE_CODE (decl) == FUNCTION_DECL)
709 if (decl_is_template_id (decl, NULL))
711 fn_type = get_mostly_instantiated_function_type (decl);
712 /* FN_TYPE will not have parameter types for in-charge or
713 VTT parameters. Therefore, we pass NULL_TREE to
714 write_bare_function_type -- otherwise, it will get
715 confused about which artificial parameters to skip. */
720 fn_type = TREE_TYPE (decl);
724 write_bare_function_type (fn_type,
725 (!DECL_CONSTRUCTOR_P (decl)
726 && !DECL_DESTRUCTOR_P (decl)
727 && !DECL_CONV_FN_P (decl)
728 && decl_is_template_id (decl, NULL)),
733 /* Lambdas can have a bit more context for mangling, specifically VAR_DECL
734 or PARM_DECL context, which doesn't belong in DECL_CONTEXT. */
737 decl_mangling_context (tree decl)
739 if (TREE_CODE (decl) == TYPE_DECL
740 && LAMBDA_TYPE_P (TREE_TYPE (decl)))
742 tree extra = LAMBDA_TYPE_EXTRA_SCOPE (TREE_TYPE (decl));
746 else if (TREE_CODE (decl) == TYPE_DECL
747 && TREE_CODE (TREE_TYPE (decl)) == TEMPLATE_TYPE_PARM)
748 /* template type parms have no mangling context. */
750 return CP_DECL_CONTEXT (decl);
753 /* <name> ::= <unscoped-name>
754 ::= <unscoped-template-name> <template-args>
758 If IGNORE_LOCAL_SCOPE is nonzero, this production of <name> is
759 called from <local-name>, which mangles the enclosing scope
760 elsewhere and then uses this function to mangle just the part
761 underneath the function scope. So don't use the <local-name>
762 production, to avoid an infinite recursion. */
765 write_name (tree decl, const int ignore_local_scope)
769 MANGLE_TRACE_TREE ("name", decl);
771 if (TREE_CODE (decl) == TYPE_DECL)
773 /* In case this is a typedef, fish out the corresponding
774 TYPE_DECL for the main variant. */
775 decl = TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl)));
778 context = decl_mangling_context (decl);
780 /* A decl in :: or ::std scope is treated specially. The former is
781 mangled using <unscoped-name> or <unscoped-template-name>, the
782 latter with a special substitution. Also, a name that is
783 directly in a local function scope is also mangled with
784 <unscoped-name> rather than a full <nested-name>. */
786 || context == global_namespace
787 || DECL_NAMESPACE_STD_P (context)
788 || (ignore_local_scope && TREE_CODE (context) == FUNCTION_DECL))
791 /* Is this a template instance? */
792 if (decl_is_template_id (decl, &template_info))
794 /* Yes: use <unscoped-template-name>. */
795 write_unscoped_template_name (TI_TEMPLATE (template_info));
796 write_template_args (TI_ARGS (template_info));
799 /* Everything else gets an <unqualified-name>. */
800 write_unscoped_name (decl);
804 /* Handle local names, unless we asked not to (that is, invoked
805 under <local-name>, to handle only the part of the name under
807 if (!ignore_local_scope)
809 /* Scan up the list of scope context, looking for a
810 function. If we find one, this entity is in local
811 function scope. local_entity tracks context one scope
812 level down, so it will contain the element that's
813 directly in that function's scope, either decl or one of
814 its enclosing scopes. */
815 tree local_entity = decl;
816 while (context != NULL && context != global_namespace)
818 /* Make sure we're always dealing with decls. */
819 if (context != NULL && TYPE_P (context))
820 context = TYPE_NAME (context);
821 /* Is this a function? */
822 if (TREE_CODE (context) == FUNCTION_DECL
823 || TREE_CODE (context) == PARM_DECL)
825 /* Yes, we have local scope. Use the <local-name>
826 production for the innermost function scope. */
827 write_local_name (context, local_entity, decl);
830 /* Up one scope level. */
831 local_entity = context;
832 context = decl_mangling_context (context);
835 /* No local scope found? Fall through to <nested-name>. */
838 /* Other decls get a <nested-name> to encode their scope. */
839 write_nested_name (decl);
843 /* <unscoped-name> ::= <unqualified-name>
844 ::= St <unqualified-name> # ::std:: */
847 write_unscoped_name (const tree decl)
849 tree context = CP_DECL_CONTEXT (decl);
851 MANGLE_TRACE_TREE ("unscoped-name", decl);
853 /* Is DECL in ::std? */
854 if (DECL_NAMESPACE_STD_P (context))
857 write_unqualified_name (decl);
861 /* If not, it should be either in the global namespace, or directly
862 in a local function scope. */
863 gcc_assert (context == global_namespace
865 || TREE_CODE (context) == FUNCTION_DECL);
867 write_unqualified_name (decl);
871 /* <unscoped-template-name> ::= <unscoped-name>
872 ::= <substitution> */
875 write_unscoped_template_name (const tree decl)
877 MANGLE_TRACE_TREE ("unscoped-template-name", decl);
879 if (find_substitution (decl))
881 write_unscoped_name (decl);
882 add_substitution (decl);
885 /* Write the nested name, including CV-qualifiers, of DECL.
887 <nested-name> ::= N [<CV-qualifiers>] <prefix> <unqualified-name> E
888 ::= N [<CV-qualifiers>] <template-prefix> <template-args> E
890 <CV-qualifiers> ::= [r] [V] [K] */
893 write_nested_name (const tree decl)
897 MANGLE_TRACE_TREE ("nested-name", decl);
901 /* Write CV-qualifiers, if this is a member function. */
902 if (TREE_CODE (decl) == FUNCTION_DECL
903 && DECL_NONSTATIC_MEMBER_FUNCTION_P (decl))
905 if (DECL_VOLATILE_MEMFUNC_P (decl))
907 if (DECL_CONST_MEMFUNC_P (decl))
911 /* Is this a template instance? */
912 if (decl_is_template_id (decl, &template_info))
914 /* Yes, use <template-prefix>. */
915 write_template_prefix (decl);
916 write_template_args (TI_ARGS (template_info));
918 else if (TREE_CODE (TREE_TYPE (decl)) == TYPENAME_TYPE)
920 tree name = TYPENAME_TYPE_FULLNAME (TREE_TYPE (decl));
921 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
923 write_template_prefix (decl);
924 write_template_args (TREE_OPERAND (name, 1));
928 write_prefix (CP_DECL_CONTEXT (decl));
929 write_unqualified_name (decl);
934 /* No, just use <prefix> */
935 write_prefix (DECL_CONTEXT (decl));
936 write_unqualified_name (decl);
941 /* <prefix> ::= <prefix> <unqualified-name>
943 ::= <template-prefix> <template-args>
945 ::= <substitution> */
948 write_prefix (const tree node)
951 /* Non-NULL if NODE represents a template-id. */
952 tree template_info = NULL;
955 || node == global_namespace)
958 MANGLE_TRACE_TREE ("prefix", node);
960 if (find_substitution (node))
965 /* If this is a function or parm decl, that means we've hit function
966 scope, so this prefix must be for a local name. In this
967 case, we're under the <local-name> production, which encodes
968 the enclosing function scope elsewhere. So don't continue
970 if (TREE_CODE (node) == FUNCTION_DECL
971 || TREE_CODE (node) == PARM_DECL)
975 decl_is_template_id (decl, &template_info);
979 /* Node is a type. */
980 decl = TYPE_NAME (node);
981 if (CLASSTYPE_TEMPLATE_ID_P (node))
982 template_info = TYPE_TEMPLATE_INFO (node);
985 /* In G++ 3.2, the name of the template parameter was used. */
986 if (TREE_CODE (node) == TEMPLATE_TYPE_PARM
987 && !abi_version_at_least (2))
988 G.need_abi_warning = true;
990 if (TREE_CODE (node) == TEMPLATE_TYPE_PARM
991 && abi_version_at_least (2))
992 write_template_param (node);
993 else if (template_info != NULL)
996 write_template_prefix (decl);
997 write_template_args (TI_ARGS (template_info));
999 else if (TREE_CODE (TREE_TYPE (decl)) == TYPENAME_TYPE)
1001 tree name = TYPENAME_TYPE_FULLNAME (TREE_TYPE (decl));
1002 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
1004 write_template_prefix (decl);
1005 write_template_args (TREE_OPERAND (name, 1));
1009 write_prefix (CP_DECL_CONTEXT (decl));
1010 write_unqualified_name (decl);
1014 /* Not templated. */
1016 write_prefix (decl_mangling_context (decl));
1017 write_unqualified_name (decl);
1018 if (TREE_CODE (decl) == VAR_DECL
1019 || TREE_CODE (decl) == FIELD_DECL)
1021 /* <data-member-prefix> := <member source-name> M */
1027 add_substitution (node);
1030 /* <template-prefix> ::= <prefix> <template component>
1031 ::= <template-param>
1032 ::= <substitution> */
1035 write_template_prefix (const tree node)
1037 tree decl = DECL_P (node) ? node : TYPE_NAME (node);
1038 tree type = DECL_P (node) ? TREE_TYPE (node) : node;
1039 tree context = CP_DECL_CONTEXT (decl);
1044 MANGLE_TRACE_TREE ("template-prefix", node);
1046 /* Find the template decl. */
1047 if (decl_is_template_id (decl, &template_info))
1048 templ = TI_TEMPLATE (template_info);
1049 else if (TREE_CODE (type) == TYPENAME_TYPE)
1050 /* For a typename type, all we have is the name. */
1051 templ = DECL_NAME (decl);
1054 gcc_assert (CLASSTYPE_TEMPLATE_ID_P (type));
1056 templ = TYPE_TI_TEMPLATE (type);
1059 /* For a member template, though, the template name for the
1060 innermost name must have all the outer template levels
1061 instantiated. For instance, consider
1063 template<typename T> struct Outer {
1064 template<typename U> struct Inner {};
1067 The template name for `Inner' in `Outer<int>::Inner<float>' is
1068 `Outer<int>::Inner<U>'. In g++, we don't instantiate the template
1069 levels separately, so there's no TEMPLATE_DECL available for this
1070 (there's only `Outer<T>::Inner<U>').
1072 In order to get the substitutions right, we create a special
1073 TREE_LIST to represent the substitution candidate for a nested
1074 template. The TREE_PURPOSE is the template's context, fully
1075 instantiated, and the TREE_VALUE is the TEMPLATE_DECL for the inner
1078 So, for the example above, `Outer<int>::Inner' is represented as a
1079 substitution candidate by a TREE_LIST whose purpose is `Outer<int>'
1080 and whose value is `Outer<T>::Inner<U>'. */
1081 if (TYPE_P (context))
1082 substitution = build_tree_list (context, templ);
1084 substitution = templ;
1086 if (find_substitution (substitution))
1089 /* In G++ 3.2, the name of the template template parameter was used. */
1090 if (TREE_TYPE (templ)
1091 && TREE_CODE (TREE_TYPE (templ)) == TEMPLATE_TEMPLATE_PARM
1092 && !abi_version_at_least (2))
1093 G.need_abi_warning = true;
1095 if (TREE_TYPE (templ)
1096 && TREE_CODE (TREE_TYPE (templ)) == TEMPLATE_TEMPLATE_PARM
1097 && abi_version_at_least (2))
1098 write_template_param (TREE_TYPE (templ));
1101 write_prefix (context);
1102 write_unqualified_name (decl);
1105 add_substitution (substitution);
1108 /* We don't need to handle thunks, vtables, or VTTs here. Those are
1109 mangled through special entry points.
1111 <unqualified-name> ::= <operator-name>
1114 ::= <unnamed-type-name>
1115 ::= <local-source-name>
1117 <local-source-name> ::= L <source-name> <discriminator> */
1120 write_unqualified_name (const tree decl)
1122 MANGLE_TRACE_TREE ("unqualified-name", decl);
1124 if (DECL_NAME (decl) == NULL_TREE)
1126 gcc_assert (DECL_ASSEMBLER_NAME_SET_P (decl));
1127 write_source_name (DECL_ASSEMBLER_NAME (decl));
1130 else if (DECL_DECLARES_FUNCTION_P (decl))
1133 if (DECL_CONSTRUCTOR_P (decl))
1134 write_special_name_constructor (decl);
1135 else if (DECL_DESTRUCTOR_P (decl))
1136 write_special_name_destructor (decl);
1137 else if (DECL_CONV_FN_P (decl))
1139 /* Conversion operator. Handle it right here.
1140 <operator> ::= cv <type> */
1142 if (decl_is_template_id (decl, NULL))
1145 fn_type = get_mostly_instantiated_function_type (decl);
1146 type = TREE_TYPE (fn_type);
1149 type = DECL_CONV_FN_TYPE (decl);
1150 write_conversion_operator_name (type);
1152 else if (DECL_OVERLOADED_OPERATOR_P (decl))
1154 operator_name_info_t *oni;
1155 if (DECL_ASSIGNMENT_OPERATOR_P (decl))
1156 oni = assignment_operator_name_info;
1158 oni = operator_name_info;
1160 write_string (oni[DECL_OVERLOADED_OPERATOR_P (decl)].mangled_name);
1169 if (VAR_OR_FUNCTION_DECL_P (decl) && ! TREE_PUBLIC (decl)
1170 && DECL_NAMESPACE_SCOPE_P (decl)
1171 && decl_linkage (decl) == lk_internal)
1173 MANGLE_TRACE_TREE ("local-source-name", decl);
1175 write_source_name (DECL_NAME (decl));
1176 /* The default discriminator is 1, and that's all we ever use,
1177 so there's no code to output one here. */
1181 tree type = TREE_TYPE (decl);
1183 if (TREE_CODE (decl) == TYPE_DECL
1184 && TYPE_ANONYMOUS_P (type))
1185 write_unnamed_type_name (type);
1186 else if (TREE_CODE (decl) == TYPE_DECL
1187 && LAMBDA_TYPE_P (type))
1188 write_closure_type_name (type);
1190 write_source_name (DECL_NAME (decl));
1194 /* Write the unqualified-name for a conversion operator to TYPE. */
1197 write_conversion_operator_name (const tree type)
1199 write_string ("cv");
1203 /* Non-terminal <source-name>. IDENTIFIER is an IDENTIFIER_NODE.
1205 <source-name> ::= </length/ number> <identifier> */
1208 write_source_name (tree identifier)
1210 MANGLE_TRACE_TREE ("source-name", identifier);
1212 /* Never write the whole template-id name including the template
1213 arguments; we only want the template name. */
1214 if (IDENTIFIER_TEMPLATE (identifier))
1215 identifier = IDENTIFIER_TEMPLATE (identifier);
1217 write_unsigned_number (IDENTIFIER_LENGTH (identifier));
1218 write_identifier (IDENTIFIER_POINTER (identifier));
1221 /* Encode 0 as _, and 1+ as n-1_. */
1224 write_compact_number (int num)
1227 write_unsigned_number (num - 1);
1231 /* Return how many unnamed types precede TYPE in its enclosing class. */
1234 nested_anon_class_index (tree type)
1237 tree member = TYPE_FIELDS (TYPE_CONTEXT (type));
1238 for (; member; member = TREE_CHAIN (member))
1239 if (DECL_IMPLICIT_TYPEDEF_P (member))
1241 tree memtype = TREE_TYPE (member);
1242 if (memtype == type)
1244 else if (TYPE_ANONYMOUS_P (memtype))
1251 /* <unnamed-type-name> ::= Ut [ <nonnegative number> ] _ */
1254 write_unnamed_type_name (const tree type __attribute__ ((__unused__)))
1257 MANGLE_TRACE_TREE ("unnamed-type-name", type);
1259 if (TYPE_FUNCTION_SCOPE_P (type))
1260 discriminator = local_class_index (type);
1261 else if (TYPE_CLASS_SCOPE_P (type))
1262 discriminator = nested_anon_class_index (type);
1265 gcc_assert (no_linkage_check (type, /*relaxed_p=*/true));
1266 /* Just use the old mangling at namespace scope. */
1267 write_source_name (TYPE_IDENTIFIER (type));
1271 write_string ("Ut");
1272 write_compact_number (discriminator);
1275 /* <closure-type-name> ::= Ul <lambda-sig> E [ <nonnegative number> ] _
1276 <lambda-sig> ::= <parameter type>+ # Parameter types or "v" if the lambda has no parameters */
1279 write_closure_type_name (const tree type)
1281 tree fn = lambda_function (type);
1282 tree lambda = CLASSTYPE_LAMBDA_EXPR (type);
1283 tree parms = TYPE_ARG_TYPES (TREE_TYPE (fn));
1285 MANGLE_TRACE_TREE ("closure-type-name", type);
1287 write_string ("Ul");
1288 write_method_parms (parms, DECL_NONSTATIC_MEMBER_FUNCTION_P (fn), fn);
1290 write_compact_number (LAMBDA_EXPR_DISCRIMINATOR (lambda));
1293 /* Convert NUMBER to ascii using base BASE and generating at least
1294 MIN_DIGITS characters. BUFFER points to the _end_ of the buffer
1295 into which to store the characters. Returns the number of
1296 characters generated (these will be layed out in advance of where
1300 hwint_to_ascii (unsigned HOST_WIDE_INT number, const unsigned int base,
1301 char *buffer, const unsigned int min_digits)
1303 static const char base_digits[] = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
1304 unsigned digits = 0;
1308 unsigned HOST_WIDE_INT d = number / base;
1310 *--buffer = base_digits[number - d * base];
1314 while (digits < min_digits)
1316 *--buffer = base_digits[0];
1322 /* Non-terminal <number>.
1324 <number> ::= [n] </decimal integer/> */
1327 write_number (unsigned HOST_WIDE_INT number, const int unsigned_p,
1328 const unsigned int base)
1330 char buffer[sizeof (HOST_WIDE_INT) * 8];
1333 if (!unsigned_p && (HOST_WIDE_INT) number < 0)
1336 number = -((HOST_WIDE_INT) number);
1338 count = hwint_to_ascii (number, base, buffer + sizeof (buffer), 1);
1339 write_chars (buffer + sizeof (buffer) - count, count);
1342 /* Write out an integral CST in decimal. Most numbers are small, and
1343 representable in a HOST_WIDE_INT. Occasionally we'll have numbers
1344 bigger than that, which we must deal with. */
1347 write_integer_cst (const tree cst)
1349 int sign = tree_int_cst_sgn (cst);
1351 if (TREE_INT_CST_HIGH (cst) + (sign < 0))
1353 /* A bignum. We do this in chunks, each of which fits in a
1355 char buffer[sizeof (HOST_WIDE_INT) * 8 * 2];
1356 unsigned HOST_WIDE_INT chunk;
1357 unsigned chunk_digits;
1358 char *ptr = buffer + sizeof (buffer);
1363 /* HOST_WIDE_INT must be at least 32 bits, so 10^9 is
1368 if (sizeof (HOST_WIDE_INT) >= 8)
1370 /* It is at least 64 bits, so 10^18 is representable. */
1375 type = c_common_signed_or_unsigned_type (1, TREE_TYPE (cst));
1376 base = build_int_cstu (type, chunk);
1377 n = build_int_cst_wide (type,
1378 TREE_INT_CST_LOW (cst), TREE_INT_CST_HIGH (cst));
1383 n = fold_build1_loc (input_location, NEGATE_EXPR, type, n);
1387 tree d = fold_build2_loc (input_location, FLOOR_DIV_EXPR, type, n, base);
1388 tree tmp = fold_build2_loc (input_location, MULT_EXPR, type, d, base);
1391 done = integer_zerop (d);
1392 tmp = fold_build2_loc (input_location, MINUS_EXPR, type, n, tmp);
1393 c = hwint_to_ascii (TREE_INT_CST_LOW (tmp), 10, ptr,
1394 done ? 1 : chunk_digits);
1400 write_chars (ptr, count);
1405 unsigned HOST_WIDE_INT low = TREE_INT_CST_LOW (cst);
1412 write_unsigned_number (low);
1416 /* Write out a floating-point literal.
1418 "Floating-point literals are encoded using the bit pattern of the
1419 target processor's internal representation of that number, as a
1420 fixed-length lowercase hexadecimal string, high-order bytes first
1421 (even if the target processor would store low-order bytes first).
1422 The "n" prefix is not used for floating-point literals; the sign
1423 bit is encoded with the rest of the number.
1425 Here are some examples, assuming the IEEE standard representation
1426 for floating point numbers. (Spaces are for readability, not
1427 part of the encoding.)
1430 -1.0f Lf bf80 0000 E
1431 1.17549435e-38f Lf 0080 0000 E
1432 1.40129846e-45f Lf 0000 0001 E
1433 0.0f Lf 0000 0000 E"
1435 Caller is responsible for the Lx and the E. */
1437 write_real_cst (const tree value)
1439 if (abi_version_at_least (2))
1441 long target_real[4]; /* largest supported float */
1442 char buffer[9]; /* eight hex digits in a 32-bit number */
1445 tree type = TREE_TYPE (value);
1446 int words = GET_MODE_BITSIZE (TYPE_MODE (type)) / 32;
1448 real_to_target (target_real, &TREE_REAL_CST (value),
1451 /* The value in target_real is in the target word order,
1452 so we must write it out backward if that happens to be
1453 little-endian. write_number cannot be used, it will
1454 produce uppercase. */
1455 if (FLOAT_WORDS_BIG_ENDIAN)
1456 i = 0, limit = words, dir = 1;
1458 i = words - 1, limit = -1, dir = -1;
1460 for (; i != limit; i += dir)
1462 sprintf (buffer, "%08lx", (unsigned long) target_real[i]);
1463 write_chars (buffer, 8);
1468 /* In G++ 3.3 and before the REAL_VALUE_TYPE was written out
1469 literally. Note that compatibility with 3.2 is impossible,
1470 because the old floating-point emulator used a different
1471 format for REAL_VALUE_TYPE. */
1473 for (i = 0; i < sizeof (TREE_REAL_CST (value)); ++i)
1474 write_number (((unsigned char *) &TREE_REAL_CST (value))[i],
1477 G.need_abi_warning = 1;
1481 /* Non-terminal <identifier>.
1483 <identifier> ::= </unqualified source code identifier> */
1486 write_identifier (const char *identifier)
1488 MANGLE_TRACE ("identifier", identifier);
1489 write_string (identifier);
1492 /* Handle constructor productions of non-terminal <special-name>.
1493 CTOR is a constructor FUNCTION_DECL.
1495 <special-name> ::= C1 # complete object constructor
1496 ::= C2 # base object constructor
1497 ::= C3 # complete object allocating constructor
1499 Currently, allocating constructors are never used.
1501 We also need to provide mangled names for the maybe-in-charge
1502 constructor, so we treat it here too. mangle_decl_string will
1503 append *INTERNAL* to that, to make sure we never emit it. */
1506 write_special_name_constructor (const tree ctor)
1508 if (DECL_BASE_CONSTRUCTOR_P (ctor))
1509 write_string ("C2");
1512 gcc_assert (DECL_COMPLETE_CONSTRUCTOR_P (ctor)
1513 /* Even though we don't ever emit a definition of
1514 the old-style destructor, we still have to
1515 consider entities (like static variables) nested
1517 || DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (ctor));
1518 write_string ("C1");
1522 /* Handle destructor productions of non-terminal <special-name>.
1523 DTOR is a destructor FUNCTION_DECL.
1525 <special-name> ::= D0 # deleting (in-charge) destructor
1526 ::= D1 # complete object (in-charge) destructor
1527 ::= D2 # base object (not-in-charge) destructor
1529 We also need to provide mangled names for the maybe-incharge
1530 destructor, so we treat it here too. mangle_decl_string will
1531 append *INTERNAL* to that, to make sure we never emit it. */
1534 write_special_name_destructor (const tree dtor)
1536 if (DECL_DELETING_DESTRUCTOR_P (dtor))
1537 write_string ("D0");
1538 else if (DECL_BASE_DESTRUCTOR_P (dtor))
1539 write_string ("D2");
1542 gcc_assert (DECL_COMPLETE_DESTRUCTOR_P (dtor)
1543 /* Even though we don't ever emit a definition of
1544 the old-style destructor, we still have to
1545 consider entities (like static variables) nested
1547 || DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P (dtor));
1548 write_string ("D1");
1552 /* Scan the vector of local classes and return how many others with the
1553 same name (or same no name) and context precede ENTITY. */
1556 local_class_index (tree entity)
1558 int ix, discriminator = 0;
1559 tree name = (TYPE_ANONYMOUS_P (entity) ? NULL_TREE
1560 : TYPE_IDENTIFIER (entity));
1561 tree ctx = TYPE_CONTEXT (entity);
1562 for (ix = 0; ; ix++)
1564 tree type = VEC_index (tree, local_classes, ix);
1566 return discriminator;
1567 if (TYPE_CONTEXT (type) == ctx
1568 && (name ? TYPE_IDENTIFIER (type) == name
1569 : TYPE_ANONYMOUS_P (type)))
1575 /* Return the discriminator for ENTITY appearing inside
1576 FUNCTION. The discriminator is the lexical ordinal of VAR among
1577 entities with the same name in the same FUNCTION. */
1580 discriminator_for_local_entity (tree entity)
1582 if (DECL_DISCRIMINATOR_P (entity))
1584 if (DECL_DISCRIMINATOR_SET_P (entity))
1585 return DECL_DISCRIMINATOR (entity);
1587 /* The first entity with a particular name doesn't get
1588 DECL_DISCRIMINATOR set up. */
1591 else if (TREE_CODE (entity) == TYPE_DECL)
1593 /* Scan the list of local classes. */
1594 entity = TREE_TYPE (entity);
1596 /* Lambdas and unnamed types have their own discriminators. */
1597 if (LAMBDA_TYPE_P (entity) || TYPE_ANONYMOUS_P (entity))
1600 return local_class_index (entity);
1606 /* Return the discriminator for STRING, a string literal used inside
1607 FUNCTION. The discriminator is the lexical ordinal of STRING among
1608 string literals used in FUNCTION. */
1611 discriminator_for_string_literal (tree function ATTRIBUTE_UNUSED,
1612 tree string ATTRIBUTE_UNUSED)
1614 /* For now, we don't discriminate amongst string literals. */
1618 /* <discriminator> := _ <number>
1620 The discriminator is used only for the second and later occurrences
1621 of the same name within a single function. In this case <number> is
1622 n - 2, if this is the nth occurrence, in lexical order. */
1625 write_discriminator (const int discriminator)
1627 /* If discriminator is zero, don't write anything. Otherwise... */
1628 if (discriminator > 0)
1631 write_unsigned_number (discriminator - 1);
1635 /* Mangle the name of a function-scope entity. FUNCTION is the
1636 FUNCTION_DECL for the enclosing function, or a PARM_DECL for lambdas in
1637 default argument scope. ENTITY is the decl for the entity itself.
1638 LOCAL_ENTITY is the entity that's directly scoped in FUNCTION_DECL,
1639 either ENTITY itself or an enclosing scope of ENTITY.
1641 <local-name> := Z <function encoding> E <entity name> [<discriminator>]
1642 := Z <function encoding> E s [<discriminator>]
1643 := Z <function encoding> Ed [ <parameter number> ] _ <entity name> */
1646 write_local_name (tree function, const tree local_entity,
1649 tree parm = NULL_TREE;
1651 MANGLE_TRACE_TREE ("local-name", entity);
1653 if (TREE_CODE (function) == PARM_DECL)
1656 function = DECL_CONTEXT (parm);
1660 write_encoding (function);
1663 /* For this purpose, parameters are numbered from right-to-left. */
1668 for (t = DECL_ARGUMENTS (function); t; t = TREE_CHAIN (t))
1676 write_compact_number (i - 1);
1679 if (TREE_CODE (entity) == STRING_CST)
1682 write_discriminator (discriminator_for_string_literal (function,
1687 /* Now the <entity name>. Let write_name know its being called
1688 from <local-name>, so it doesn't try to process the enclosing
1689 function scope again. */
1690 write_name (entity, /*ignore_local_scope=*/1);
1691 write_discriminator (discriminator_for_local_entity (local_entity));
1695 /* Non-terminals <type> and <CV-qualifier>.
1697 <type> ::= <builtin-type>
1699 ::= <class-enum-type>
1701 ::= <pointer-to-member-type>
1702 ::= <template-param>
1705 ::= P <type> # pointer-to
1706 ::= R <type> # reference-to
1707 ::= C <type> # complex pair (C 2000)
1708 ::= G <type> # imaginary (C 2000) [not supported]
1709 ::= U <source-name> <type> # vendor extended type qualifier
1713 <type> ::= RR <type> # rvalue reference-to
1714 <type> ::= Dt <expression> # decltype of an id-expression or
1715 # class member access
1716 <type> ::= DT <expression> # decltype of an expression
1718 TYPE is a type node. */
1721 write_type (tree type)
1723 /* This gets set to nonzero if TYPE turns out to be a (possibly
1724 CV-qualified) builtin type. */
1725 int is_builtin_type = 0;
1727 MANGLE_TRACE_TREE ("type", type);
1729 if (type == error_mark_node)
1732 if (find_substitution (type))
1735 if (write_CV_qualifiers_for_type (type) > 0)
1736 /* If TYPE was CV-qualified, we just wrote the qualifiers; now
1737 mangle the unqualified type. The recursive call is needed here
1738 since both the qualified and unqualified types are substitution
1740 write_type (TYPE_MAIN_VARIANT (type));
1741 else if (TREE_CODE (type) == ARRAY_TYPE)
1742 /* It is important not to use the TYPE_MAIN_VARIANT of TYPE here
1743 so that the cv-qualification of the element type is available
1744 in write_array_type. */
1745 write_array_type (type);
1748 tree type_orig = type;
1750 /* See through any typedefs. */
1751 type = TYPE_MAIN_VARIANT (type);
1753 if (TYPE_PTRMEM_P (type))
1754 write_pointer_to_member_type (type);
1757 /* Handle any target-specific fundamental types. */
1758 const char *target_mangling
1759 = targetm.mangle_type (type_orig);
1761 if (target_mangling)
1763 write_string (target_mangling);
1764 /* Add substitutions for types other than fundamental
1766 if (TREE_CODE (type) != VOID_TYPE
1767 && TREE_CODE (type) != INTEGER_TYPE
1768 && TREE_CODE (type) != REAL_TYPE
1769 && TREE_CODE (type) != BOOLEAN_TYPE)
1770 add_substitution (type);
1774 switch (TREE_CODE (type))
1778 case INTEGER_TYPE: /* Includes wchar_t. */
1780 case FIXED_POINT_TYPE:
1782 /* If this is a typedef, TYPE may not be one of
1783 the standard builtin type nodes, but an alias of one. Use
1784 TYPE_MAIN_VARIANT to get to the underlying builtin type. */
1785 write_builtin_type (TYPE_MAIN_VARIANT (type));
1792 write_type (TREE_TYPE (type));
1797 write_function_type (type);
1803 /* A pointer-to-member function is represented as a special
1804 RECORD_TYPE, so check for this first. */
1805 if (TYPE_PTRMEMFUNC_P (type))
1806 write_pointer_to_member_type (type);
1808 write_class_enum_type (type);
1812 case UNBOUND_CLASS_TEMPLATE:
1813 /* We handle TYPENAME_TYPEs and UNBOUND_CLASS_TEMPLATEs like
1814 ordinary nested names. */
1815 write_nested_name (TYPE_STUB_DECL (type));
1820 write_type (TREE_TYPE (type));
1823 case REFERENCE_TYPE:
1824 if (TYPE_REF_IS_RVALUE (type))
1828 write_type (TREE_TYPE (type));
1831 case TEMPLATE_TYPE_PARM:
1832 case TEMPLATE_PARM_INDEX:
1833 write_template_param (type);
1836 case TEMPLATE_TEMPLATE_PARM:
1837 write_template_template_param (type);
1840 case BOUND_TEMPLATE_TEMPLATE_PARM:
1841 write_template_template_param (type);
1843 (TI_ARGS (TEMPLATE_TEMPLATE_PARM_TEMPLATE_INFO (type)));
1847 write_string ("U8__vector");
1848 write_type (TREE_TYPE (type));
1851 case TYPE_PACK_EXPANSION:
1852 write_string ("Dp");
1853 write_type (PACK_EXPANSION_PATTERN (type));
1857 /* These shouldn't make it into mangling. */
1858 gcc_assert (!DECLTYPE_FOR_LAMBDA_CAPTURE (type)
1859 && !DECLTYPE_FOR_LAMBDA_RETURN (type));
1862 if (DECLTYPE_TYPE_ID_EXPR_OR_MEMBER_ACCESS_P (type))
1866 ++cp_unevaluated_operand;
1867 write_expression (DECLTYPE_TYPE_EXPR (type));
1868 --cp_unevaluated_operand;
1873 sorry ("mangling typeof, use decltype instead");
1882 /* Types other than builtin types are substitution candidates. */
1883 if (!is_builtin_type)
1884 add_substitution (type);
1887 /* Non-terminal <CV-qualifiers> for type nodes. Returns the number of
1888 CV-qualifiers written for TYPE.
1890 <CV-qualifiers> ::= [r] [V] [K] */
1893 write_CV_qualifiers_for_type (const tree type)
1895 int num_qualifiers = 0;
1897 /* The order is specified by:
1899 "In cases where multiple order-insensitive qualifiers are
1900 present, they should be ordered 'K' (closest to the base type),
1901 'V', 'r', and 'U' (farthest from the base type) ..."
1903 Note that we do not use cp_type_quals below; given "const
1904 int[3]", the "const" is emitted with the "int", not with the
1907 if (TYPE_QUALS (type) & TYPE_QUAL_RESTRICT)
1912 if (TYPE_QUALS (type) & TYPE_QUAL_VOLATILE)
1917 if (TYPE_QUALS (type) & TYPE_QUAL_CONST)
1923 return num_qualifiers;
1926 /* Non-terminal <builtin-type>.
1928 <builtin-type> ::= v # void
1933 ::= h # unsigned char
1935 ::= t # unsigned short
1937 ::= j # unsigned int
1939 ::= m # unsigned long
1940 ::= x # long long, __int64
1941 ::= y # unsigned long long, __int64
1943 ::= o # unsigned __int128
1946 ::= e # long double, __float80
1947 ::= g # __float128 [not supported]
1948 ::= u <source-name> # vendor extended type */
1951 write_builtin_type (tree type)
1953 if (TYPE_CANONICAL (type))
1954 type = TYPE_CANONICAL (type);
1956 switch (TREE_CODE (type))
1967 /* TYPE may still be wchar_t, char16_t, or char32_t, since that
1968 isn't in integer_type_nodes. */
1969 if (type == wchar_type_node)
1971 else if (type == char16_type_node)
1972 write_string ("Ds");
1973 else if (type == char32_type_node)
1974 write_string ("Di");
1975 else if (TYPE_FOR_JAVA (type))
1976 write_java_integer_type_codes (type);
1980 /* Assume TYPE is one of the shared integer type nodes. Find
1981 it in the array of these nodes. */
1983 for (itk = 0; itk < itk_none; ++itk)
1984 if (type == integer_types[itk])
1986 /* Print the corresponding single-letter code. */
1987 write_char (integer_type_codes[itk]);
1991 if (itk == itk_none)
1993 tree t = c_common_type_for_mode (TYPE_MODE (type),
1994 TYPE_UNSIGNED (type));
2001 if (TYPE_PRECISION (type) == 128)
2002 write_char (TYPE_UNSIGNED (type) ? 'o' : 'n');
2005 /* Allow for cases where TYPE is not one of the shared
2006 integer type nodes and write a "vendor extended builtin
2007 type" with a name the form intN or uintN, respectively.
2008 Situations like this can happen if you have an
2009 __attribute__((__mode__(__SI__))) type and use exotic
2010 switches like '-mint8' on AVR. Of course, this is
2011 undefined by the C++ ABI (and '-mint8' is not even
2012 Standard C conforming), but when using such special
2013 options you're pretty much in nowhere land anyway. */
2015 char prec[11]; /* up to ten digits for an unsigned */
2017 prefix = TYPE_UNSIGNED (type) ? "uint" : "int";
2018 sprintf (prec, "%u", (unsigned) TYPE_PRECISION (type));
2019 write_char ('u'); /* "vendor extended builtin type" */
2020 write_unsigned_number (strlen (prefix) + strlen (prec));
2021 write_string (prefix);
2022 write_string (prec);
2029 if (type == float_type_node
2030 || type == java_float_type_node)
2032 else if (type == double_type_node
2033 || type == java_double_type_node)
2035 else if (type == long_double_type_node)
2037 else if (type == dfloat32_type_node)
2038 write_string ("Df");
2039 else if (type == dfloat64_type_node)
2040 write_string ("Dd");
2041 else if (type == dfloat128_type_node)
2042 write_string ("De");
2047 case FIXED_POINT_TYPE:
2048 write_string ("DF");
2049 if (GET_MODE_IBIT (TYPE_MODE (type)) > 0)
2050 write_unsigned_number (GET_MODE_IBIT (TYPE_MODE (type)));
2051 if (type == fract_type_node
2052 || type == sat_fract_type_node
2053 || type == accum_type_node
2054 || type == sat_accum_type_node)
2056 else if (type == unsigned_fract_type_node
2057 || type == sat_unsigned_fract_type_node
2058 || type == unsigned_accum_type_node
2059 || type == sat_unsigned_accum_type_node)
2061 else if (type == short_fract_type_node
2062 || type == sat_short_fract_type_node
2063 || type == short_accum_type_node
2064 || type == sat_short_accum_type_node)
2066 else if (type == unsigned_short_fract_type_node
2067 || type == sat_unsigned_short_fract_type_node
2068 || type == unsigned_short_accum_type_node
2069 || type == sat_unsigned_short_accum_type_node)
2071 else if (type == long_fract_type_node
2072 || type == sat_long_fract_type_node
2073 || type == long_accum_type_node
2074 || type == sat_long_accum_type_node)
2076 else if (type == unsigned_long_fract_type_node
2077 || type == sat_unsigned_long_fract_type_node
2078 || type == unsigned_long_accum_type_node
2079 || type == sat_unsigned_long_accum_type_node)
2081 else if (type == long_long_fract_type_node
2082 || type == sat_long_long_fract_type_node
2083 || type == long_long_accum_type_node
2084 || type == sat_long_long_accum_type_node)
2086 else if (type == unsigned_long_long_fract_type_node
2087 || type == sat_unsigned_long_long_fract_type_node
2088 || type == unsigned_long_long_accum_type_node
2089 || type == sat_unsigned_long_long_accum_type_node)
2092 sorry ("mangling unknown fixed point type");
2093 write_unsigned_number (GET_MODE_FBIT (TYPE_MODE (type)));
2094 if (TYPE_SATURATING (type))
2105 /* Non-terminal <function-type>. NODE is a FUNCTION_TYPE or
2106 METHOD_TYPE. The return type is mangled before the parameter
2109 <function-type> ::= F [Y] <bare-function-type> E */
2112 write_function_type (const tree type)
2114 MANGLE_TRACE_TREE ("function-type", type);
2116 /* For a pointer to member function, the function type may have
2117 cv-qualifiers, indicating the quals for the artificial 'this'
2119 if (TREE_CODE (type) == METHOD_TYPE)
2121 /* The first parameter must be a POINTER_TYPE pointing to the
2122 `this' parameter. */
2123 tree this_type = TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (type)));
2124 write_CV_qualifiers_for_type (this_type);
2128 /* We don't track whether or not a type is `extern "C"'. Note that
2129 you can have an `extern "C"' function that does not have
2130 `extern "C"' type, and vice versa:
2132 extern "C" typedef void function_t();
2133 function_t f; // f has C++ linkage, but its type is
2136 typedef void function_t();
2137 extern "C" function_t f; // Vice versa.
2140 write_bare_function_type (type, /*include_return_type_p=*/1,
2145 /* Non-terminal <bare-function-type>. TYPE is a FUNCTION_TYPE or
2146 METHOD_TYPE. If INCLUDE_RETURN_TYPE is nonzero, the return value
2147 is mangled before the parameter types. If non-NULL, DECL is
2148 FUNCTION_DECL for the function whose type is being emitted.
2150 If DECL is a member of a Java type, then a literal 'J'
2151 is output and the return type is mangled as if INCLUDE_RETURN_TYPE
2154 <bare-function-type> ::= [J]</signature/ type>+ */
2157 write_bare_function_type (const tree type, const int include_return_type_p,
2162 MANGLE_TRACE_TREE ("bare-function-type", type);
2164 /* Detect Java methods and emit special encoding. */
2166 && DECL_FUNCTION_MEMBER_P (decl)
2167 && TYPE_FOR_JAVA (DECL_CONTEXT (decl))
2168 && !DECL_CONSTRUCTOR_P (decl)
2169 && !DECL_DESTRUCTOR_P (decl)
2170 && !DECL_CONV_FN_P (decl))
2180 /* Mangle the return type, if requested. */
2181 if (include_return_type_p || java_method_p)
2182 write_type (TREE_TYPE (type));
2184 /* Now mangle the types of the arguments. */
2185 write_method_parms (TYPE_ARG_TYPES (type),
2186 TREE_CODE (type) == METHOD_TYPE,
2190 /* Write the mangled representation of a method parameter list of
2191 types given in PARM_TYPES. If METHOD_P is nonzero, the function is
2192 considered a non-static method, and the this parameter is omitted.
2193 If non-NULL, DECL is the FUNCTION_DECL for the function whose
2194 parameters are being emitted. */
2197 write_method_parms (tree parm_types, const int method_p, const tree decl)
2199 tree first_parm_type;
2200 tree parm_decl = decl ? DECL_ARGUMENTS (decl) : NULL_TREE;
2202 /* Assume this parameter type list is variable-length. If it ends
2203 with a void type, then it's not. */
2206 /* If this is a member function, skip the first arg, which is the
2208 "Member functions do not encode the type of their implicit this
2211 Similarly, there's no need to mangle artificial parameters, like
2212 the VTT parameters for constructors and destructors. */
2215 parm_types = TREE_CHAIN (parm_types);
2216 parm_decl = parm_decl ? TREE_CHAIN (parm_decl) : NULL_TREE;
2218 while (parm_decl && DECL_ARTIFICIAL (parm_decl))
2220 parm_types = TREE_CHAIN (parm_types);
2221 parm_decl = TREE_CHAIN (parm_decl);
2225 for (first_parm_type = parm_types;
2227 parm_types = TREE_CHAIN (parm_types))
2229 tree parm = TREE_VALUE (parm_types);
2230 if (parm == void_type_node)
2232 /* "Empty parameter lists, whether declared as () or
2233 conventionally as (void), are encoded with a void parameter
2235 if (parm_types == first_parm_type)
2237 /* If the parm list is terminated with a void type, it's
2240 /* A void type better be the last one. */
2241 gcc_assert (TREE_CHAIN (parm_types) == NULL);
2248 /* <builtin-type> ::= z # ellipsis */
2252 /* <class-enum-type> ::= <name> */
2255 write_class_enum_type (const tree type)
2257 write_name (TYPE_NAME (type), /*ignore_local_scope=*/0);
2260 /* Non-terminal <template-args>. ARGS is a TREE_VEC of template
2263 <template-args> ::= I <template-arg>* E */
2266 write_template_args (tree args)
2271 MANGLE_TRACE_TREE ("template-args", args);
2276 length = TREE_VEC_LENGTH (args);
2278 if (args && TREE_CODE (TREE_VEC_ELT (args, 0)) == TREE_VEC)
2280 /* We have nested template args. We want the innermost template
2282 args = TREE_VEC_ELT (args, length - 1);
2283 length = TREE_VEC_LENGTH (args);
2285 for (i = 0; i < length; ++i)
2286 write_template_arg (TREE_VEC_ELT (args, i));
2293 <unqualified-name> <template-args>
2294 part of SCOPE_REF or COMPONENT_REF mangling. */
2297 write_member_name (tree member)
2299 if (TREE_CODE (member) == IDENTIFIER_NODE)
2300 write_source_name (member);
2301 else if (DECL_P (member))
2303 /* G++ 3.2 incorrectly put out both the "sr" code and
2304 the nested name of the qualified name. */
2305 G.need_abi_warning = 1;
2306 write_unqualified_name (member);
2308 else if (TREE_CODE (member) == TEMPLATE_ID_EXPR)
2310 tree name = TREE_OPERAND (member, 0);
2311 if (TREE_CODE (name) == OVERLOAD)
2312 name = OVL_FUNCTION (name);
2313 write_member_name (name);
2314 write_template_args (TREE_OPERAND (member, 1));
2317 write_expression (member);
2320 /* <expression> ::= <unary operator-name> <expression>
2321 ::= <binary operator-name> <expression> <expression>
2324 <expr-primary> ::= <template-param>
2325 ::= L <type> <value number> E # literal
2326 ::= L <mangled-name> E # external name
2327 ::= st <type> # sizeof
2328 ::= sr <type> <unqualified-name> # dependent name
2329 ::= sr <type> <unqualified-name> <template-args> */
2332 write_expression (tree expr)
2334 enum tree_code code = TREE_CODE (expr);
2336 /* Skip NOP_EXPRs. They can occur when (say) a pointer argument
2337 is converted (via qualification conversions) to another
2339 while (TREE_CODE (expr) == NOP_EXPR
2340 || TREE_CODE (expr) == NON_LVALUE_EXPR)
2342 expr = TREE_OPERAND (expr, 0);
2343 code = TREE_CODE (expr);
2346 if (code == BASELINK)
2348 expr = BASELINK_FUNCTIONS (expr);
2349 code = TREE_CODE (expr);
2352 /* Handle pointers-to-members by making them look like expression
2354 if (code == PTRMEM_CST)
2356 expr = build_nt (ADDR_EXPR,
2357 build_qualified_name (/*type=*/NULL_TREE,
2358 PTRMEM_CST_CLASS (expr),
2359 PTRMEM_CST_MEMBER (expr),
2360 /*template_p=*/false));
2361 code = TREE_CODE (expr);
2364 /* Handle template parameters. */
2365 if (code == TEMPLATE_TYPE_PARM
2366 || code == TEMPLATE_TEMPLATE_PARM
2367 || code == BOUND_TEMPLATE_TEMPLATE_PARM
2368 || code == TEMPLATE_PARM_INDEX)
2369 write_template_param (expr);
2370 /* Handle literals. */
2371 else if (TREE_CODE_CLASS (code) == tcc_constant
2372 || (abi_version_at_least (2) && code == CONST_DECL))
2373 write_template_arg_literal (expr);
2374 else if (code == PARM_DECL)
2376 /* A function parameter used in a late-specified return type. */
2377 int index = DECL_PARM_INDEX (expr);
2378 gcc_assert (index >= 1);
2379 write_string ("fp");
2380 write_compact_number (index - 1);
2382 else if (DECL_P (expr))
2384 /* G++ 3.2 incorrectly mangled non-type template arguments of
2385 enumeration type using their names. */
2386 if (code == CONST_DECL)
2387 G.need_abi_warning = 1;
2389 write_mangled_name (expr, false);
2392 else if (TREE_CODE (expr) == SIZEOF_EXPR
2393 && TYPE_P (TREE_OPERAND (expr, 0)))
2395 write_string ("st");
2396 write_type (TREE_OPERAND (expr, 0));
2398 else if (TREE_CODE (expr) == ALIGNOF_EXPR
2399 && TYPE_P (TREE_OPERAND (expr, 0)))
2401 write_string ("at");
2402 write_type (TREE_OPERAND (expr, 0));
2404 else if (abi_version_at_least (2) && TREE_CODE (expr) == SCOPE_REF)
2406 tree scope = TREE_OPERAND (expr, 0);
2407 tree member = TREE_OPERAND (expr, 1);
2409 /* If the MEMBER is a real declaration, then the qualifying
2410 scope was not dependent. Ideally, we would not have a
2411 SCOPE_REF in those cases, but sometimes we do. If the second
2412 argument is a DECL, then the name must not have been
2414 if (DECL_P (member))
2415 write_expression (member);
2420 write_string ("sr");
2422 /* If MEMBER is a template-id, separate the template
2423 from the arguments. */
2424 if (TREE_CODE (member) == TEMPLATE_ID_EXPR)
2426 template_args = TREE_OPERAND (member, 1);
2427 member = TREE_OPERAND (member, 0);
2430 template_args = NULL_TREE;
2431 /* Write out the name of the MEMBER. */
2432 if (IDENTIFIER_TYPENAME_P (member))
2433 write_conversion_operator_name (TREE_TYPE (member));
2434 else if (IDENTIFIER_OPNAME_P (member))
2437 const char *mangled_name = NULL;
2439 /* Unfortunately, there is no easy way to go from the
2440 name of the operator back to the corresponding tree
2442 for (i = 0; i < MAX_TREE_CODES; ++i)
2443 if (operator_name_info[i].identifier == member)
2445 /* The ABI says that we prefer binary operator
2446 names to unary operator names. */
2447 if (operator_name_info[i].arity == 2)
2449 mangled_name = operator_name_info[i].mangled_name;
2452 else if (!mangled_name)
2453 mangled_name = operator_name_info[i].mangled_name;
2455 else if (assignment_operator_name_info[i].identifier
2459 = assignment_operator_name_info[i].mangled_name;
2462 write_string (mangled_name);
2465 write_source_name (member);
2466 /* Write out the template arguments. */
2468 write_template_args (template_args);
2471 else if (TREE_CODE (expr) == INDIRECT_REF
2472 && TREE_TYPE (TREE_OPERAND (expr, 0))
2473 && TREE_CODE (TREE_TYPE (TREE_OPERAND (expr, 0))) == REFERENCE_TYPE)
2475 write_expression (TREE_OPERAND (expr, 0));
2482 /* When we bind a variable or function to a non-type template
2483 argument with reference type, we create an ADDR_EXPR to show
2484 the fact that the entity's address has been taken. But, we
2485 don't actually want to output a mangling code for the `&'. */
2486 if (TREE_CODE (expr) == ADDR_EXPR
2488 && TREE_CODE (TREE_TYPE (expr)) == REFERENCE_TYPE)
2490 expr = TREE_OPERAND (expr, 0);
2493 write_expression (expr);
2497 code = TREE_CODE (expr);
2500 if (code == COMPONENT_REF)
2502 tree ob = TREE_OPERAND (expr, 0);
2504 if (TREE_CODE (ob) == ARROW_EXPR)
2506 write_string (operator_name_info[(int)code].mangled_name);
2507 ob = TREE_OPERAND (ob, 0);
2510 write_string ("dt");
2512 write_expression (ob);
2513 write_member_name (TREE_OPERAND (expr, 1));
2517 /* If it wasn't any of those, recursively expand the expression. */
2518 name = operator_name_info[(int) code].mangled_name;
2521 sorry ("mangling %C", code);
2525 write_string (name);
2531 tree fn = CALL_EXPR_FN (expr);
2533 if (TREE_CODE (fn) == ADDR_EXPR)
2534 fn = TREE_OPERAND (fn, 0);
2536 /* Mangle a dependent name as the name, not whatever happens to
2537 be the first function in the overload set. */
2538 if ((TREE_CODE (fn) == FUNCTION_DECL
2539 || TREE_CODE (fn) == OVERLOAD)
2540 && type_dependent_expression_p_push (expr))
2541 fn = DECL_NAME (get_first_fn (fn));
2543 if (TREE_CODE (fn) == IDENTIFIER_NODE)
2544 write_source_name (fn);
2546 write_expression (fn);
2549 for (i = 0; i < call_expr_nargs (expr); ++i)
2550 write_expression (CALL_EXPR_ARG (expr, i));
2555 write_type (TREE_TYPE (expr));
2556 if (list_length (TREE_OPERAND (expr, 0)) == 1)
2557 write_expression (TREE_VALUE (TREE_OPERAND (expr, 0)));
2560 tree args = TREE_OPERAND (expr, 0);
2562 for (; args; args = TREE_CHAIN (args))
2563 write_expression (TREE_VALUE (args));
2568 /* FIXME these should have a distinct mangling. */
2569 case STATIC_CAST_EXPR:
2570 case CONST_CAST_EXPR:
2571 write_type (TREE_TYPE (expr));
2572 write_expression (TREE_OPERAND (expr, 0));
2576 sorry ("mangling new-expression");
2579 /* Handle pointers-to-members specially. */
2581 write_type (TREE_OPERAND (expr, 0));
2582 write_member_name (TREE_OPERAND (expr, 1));
2586 for (i = 0; i < TREE_OPERAND_LENGTH (expr); ++i)
2588 tree operand = TREE_OPERAND (expr, i);
2589 /* As a GNU extension, the middle operand of a
2590 conditional may be omitted. Since expression
2591 manglings are supposed to represent the input token
2592 stream, there's no good way to mangle such an
2593 expression without extending the C++ ABI. */
2594 if (code == COND_EXPR && i == 1 && !operand)
2596 error ("omitted middle operand to %<?:%> operand "
2597 "cannot be mangled");
2600 write_expression (operand);
2606 /* Literal subcase of non-terminal <template-arg>.
2608 "Literal arguments, e.g. "A<42L>", are encoded with their type
2609 and value. Negative integer values are preceded with "n"; for
2610 example, "A<-42L>" becomes "1AILln42EE". The bool value false is
2611 encoded as 0, true as 1." */
2614 write_template_arg_literal (const tree value)
2617 write_type (TREE_TYPE (value));
2619 switch (TREE_CODE (value))
2622 write_integer_cst (DECL_INITIAL (value));
2626 gcc_assert (!same_type_p (TREE_TYPE (value), boolean_type_node)
2627 || integer_zerop (value) || integer_onep (value));
2628 write_integer_cst (value);
2632 write_real_cst (value);
2642 /* Non-terminal <template-arg>.
2644 <template-arg> ::= <type> # type
2645 ::= L <type> </value/ number> E # literal
2646 ::= LZ <name> E # external name
2647 ::= X <expression> E # expression */
2650 write_template_arg (tree node)
2652 enum tree_code code = TREE_CODE (node);
2654 MANGLE_TRACE_TREE ("template-arg", node);
2656 /* A template template parameter's argument list contains TREE_LIST
2657 nodes of which the value field is the actual argument. */
2658 if (code == TREE_LIST)
2660 node = TREE_VALUE (node);
2661 /* If it's a decl, deal with its type instead. */
2664 node = TREE_TYPE (node);
2665 code = TREE_CODE (node);
2669 if (TREE_CODE (node) == NOP_EXPR
2670 && TREE_CODE (TREE_TYPE (node)) == REFERENCE_TYPE)
2672 /* Template parameters can be of reference type. To maintain
2673 internal consistency, such arguments use a conversion from
2674 address of object to reference type. */
2675 gcc_assert (TREE_CODE (TREE_OPERAND (node, 0)) == ADDR_EXPR);
2676 if (abi_version_at_least (2))
2677 node = TREE_OPERAND (TREE_OPERAND (node, 0), 0);
2679 G.need_abi_warning = 1;
2682 if (ARGUMENT_PACK_P (node))
2684 /* Expand the template argument pack. */
2685 tree args = ARGUMENT_PACK_ARGS (node);
2686 int i, length = TREE_VEC_LENGTH (args);
2688 for (i = 0; i < length; ++i)
2689 write_template_arg (TREE_VEC_ELT (args, i));
2692 else if (TYPE_P (node))
2694 else if (code == TEMPLATE_DECL)
2695 /* A template appearing as a template arg is a template template arg. */
2696 write_template_template_arg (node);
2697 else if ((TREE_CODE_CLASS (code) == tcc_constant && code != PTRMEM_CST)
2698 || (abi_version_at_least (2) && code == CONST_DECL))
2699 write_template_arg_literal (node);
2700 else if (DECL_P (node))
2702 /* Until ABI version 2, non-type template arguments of
2703 enumeration type were mangled using their names. */
2704 if (code == CONST_DECL && !abi_version_at_least (2))
2705 G.need_abi_warning = 1;
2707 /* Until ABI version 3, the underscore before the mangled name
2708 was incorrectly omitted. */
2709 if (!abi_version_at_least (3))
2711 G.need_abi_warning = 1;
2715 write_string ("_Z");
2716 write_encoding (node);
2721 /* Template arguments may be expressions. */
2723 write_expression (node);
2728 /* <template-template-arg>
2730 ::= <substitution> */
2733 write_template_template_arg (const tree decl)
2735 MANGLE_TRACE_TREE ("template-template-arg", decl);
2737 if (find_substitution (decl))
2739 write_name (decl, /*ignore_local_scope=*/0);
2740 add_substitution (decl);
2744 /* Non-terminal <array-type>. TYPE is an ARRAY_TYPE.
2746 <array-type> ::= A [</dimension/ number>] _ </element/ type>
2747 ::= A <expression> _ </element/ type>
2749 "Array types encode the dimension (number of elements) and the
2750 element type. For variable length arrays, the dimension (but not
2751 the '_' separator) is omitted." */
2754 write_array_type (const tree type)
2757 if (TYPE_DOMAIN (type))
2762 index_type = TYPE_DOMAIN (type);
2763 /* The INDEX_TYPE gives the upper and lower bounds of the
2765 max = TYPE_MAX_VALUE (index_type);
2766 if (TREE_CODE (max) == INTEGER_CST)
2768 /* The ABI specifies that we should mangle the number of
2769 elements in the array, not the largest allowed index. */
2770 max = size_binop (PLUS_EXPR, max, size_one_node);
2771 write_unsigned_number (tree_low_cst (max, 1));
2775 max = TREE_OPERAND (max, 0);
2776 if (!abi_version_at_least (2))
2778 /* value_dependent_expression_p presumes nothing is
2779 dependent when PROCESSING_TEMPLATE_DECL is zero. */
2780 ++processing_template_decl;
2781 if (!value_dependent_expression_p (max))
2782 G.need_abi_warning = 1;
2783 --processing_template_decl;
2785 write_expression (max);
2790 write_type (TREE_TYPE (type));
2793 /* Non-terminal <pointer-to-member-type> for pointer-to-member
2794 variables. TYPE is a pointer-to-member POINTER_TYPE.
2796 <pointer-to-member-type> ::= M </class/ type> </member/ type> */
2799 write_pointer_to_member_type (const tree type)
2802 write_type (TYPE_PTRMEM_CLASS_TYPE (type));
2803 write_type (TYPE_PTRMEM_POINTED_TO_TYPE (type));
2806 /* Non-terminal <template-param>. PARM is a TEMPLATE_TYPE_PARM,
2807 TEMPLATE_TEMPLATE_PARM, BOUND_TEMPLATE_TEMPLATE_PARM or a
2808 TEMPLATE_PARM_INDEX.
2810 <template-param> ::= T </parameter/ number> _ */
2813 write_template_param (const tree parm)
2817 MANGLE_TRACE_TREE ("template-parm", parm);
2819 switch (TREE_CODE (parm))
2821 case TEMPLATE_TYPE_PARM:
2822 case TEMPLATE_TEMPLATE_PARM:
2823 case BOUND_TEMPLATE_TEMPLATE_PARM:
2824 parm_index = TEMPLATE_TYPE_IDX (parm);
2827 case TEMPLATE_PARM_INDEX:
2828 parm_index = TEMPLATE_PARM_IDX (parm);
2836 /* NUMBER as it appears in the mangling is (-1)-indexed, with the
2837 earliest template param denoted by `_'. */
2838 write_compact_number (parm_index);
2841 /* <template-template-param>
2842 ::= <template-param>
2843 ::= <substitution> */
2846 write_template_template_param (const tree parm)
2848 tree templ = NULL_TREE;
2850 /* PARM, a TEMPLATE_TEMPLATE_PARM, is an instantiation of the
2851 template template parameter. The substitution candidate here is
2852 only the template. */
2853 if (TREE_CODE (parm) == BOUND_TEMPLATE_TEMPLATE_PARM)
2856 = TI_TEMPLATE (TEMPLATE_TEMPLATE_PARM_TEMPLATE_INFO (parm));
2857 if (find_substitution (templ))
2861 /* <template-param> encodes only the template parameter position,
2862 not its template arguments, which is fine here. */
2863 write_template_param (parm);
2865 add_substitution (templ);
2868 /* Non-terminal <substitution>.
2870 <substitution> ::= S <seq-id> _
2874 write_substitution (const int seq_id)
2876 MANGLE_TRACE ("substitution", "");
2880 write_number (seq_id - 1, /*unsigned=*/1, 36);
2884 /* Start mangling ENTITY. */
2887 start_mangling (const tree entity)
2890 G.need_abi_warning = false;
2891 obstack_free (&name_obstack, name_base);
2892 mangle_obstack = &name_obstack;
2893 name_base = obstack_alloc (&name_obstack, 0);
2896 /* Done with mangling. If WARN is true, and the name of G.entity will
2897 be mangled differently in a future version of the ABI, issue a
2901 finish_mangling_internal (const bool warn)
2903 if (warn_abi && warn && G.need_abi_warning)
2904 warning (OPT_Wabi, "the mangled name of %qD will change in a future "
2908 /* Clear all the substitutions. */
2909 VEC_truncate (tree, G.substitutions, 0);
2911 /* Null-terminate the string. */
2916 /* Like finish_mangling_internal, but return the mangled string. */
2918 static inline const char *
2919 finish_mangling (const bool warn)
2921 finish_mangling_internal (warn);
2922 return (const char *) obstack_finish (mangle_obstack);
2925 /* Like finish_mangling_internal, but return an identifier. */
2928 finish_mangling_get_identifier (const bool warn)
2930 finish_mangling_internal (warn);
2931 /* Don't obstack_finish here, and the next start_mangling will
2932 remove the identifier. */
2933 return get_identifier ((const char *) obstack_base (mangle_obstack));
2936 /* Initialize data structures for mangling. */
2941 gcc_obstack_init (&name_obstack);
2942 name_base = obstack_alloc (&name_obstack, 0);
2943 G.substitutions = NULL;
2945 /* Cache these identifiers for quick comparison when checking for
2946 standard substitutions. */
2947 subst_identifiers[SUBID_ALLOCATOR] = get_identifier ("allocator");
2948 subst_identifiers[SUBID_BASIC_STRING] = get_identifier ("basic_string");
2949 subst_identifiers[SUBID_CHAR_TRAITS] = get_identifier ("char_traits");
2950 subst_identifiers[SUBID_BASIC_ISTREAM] = get_identifier ("basic_istream");
2951 subst_identifiers[SUBID_BASIC_OSTREAM] = get_identifier ("basic_ostream");
2952 subst_identifiers[SUBID_BASIC_IOSTREAM] = get_identifier ("basic_iostream");
2955 /* Generate the mangled name of DECL. */
2958 mangle_decl_string (const tree decl)
2962 start_mangling (decl);
2964 if (TREE_CODE (decl) == TYPE_DECL)
2965 write_type (TREE_TYPE (decl));
2967 write_mangled_name (decl, true);
2969 result = finish_mangling_get_identifier (/*warn=*/true);
2971 fprintf (stderr, "mangle_decl_string = '%s'\n\n",
2972 IDENTIFIER_POINTER (result));
2976 /* Create an identifier for the external mangled name of DECL. */
2979 mangle_decl (const tree decl)
2981 tree id = mangle_decl_string (decl);
2982 id = targetm.mangle_decl_assembler_name (decl, id);
2983 SET_DECL_ASSEMBLER_NAME (decl, id);
2986 /* Generate the mangled representation of TYPE. */
2989 mangle_type_string (const tree type)
2993 start_mangling (type);
2995 result = finish_mangling (/*warn=*/false);
2997 fprintf (stderr, "mangle_type_string = '%s'\n\n", result);
3001 /* Create an identifier for the mangled name of a special component
3002 for belonging to TYPE. CODE is the ABI-specified code for this
3006 mangle_special_for_type (const tree type, const char *code)
3010 /* We don't have an actual decl here for the special component, so
3011 we can't just process the <encoded-name>. Instead, fake it. */
3012 start_mangling (type);
3014 /* Start the mangling. */
3015 write_string ("_Z");
3016 write_string (code);
3020 result = finish_mangling_get_identifier (/*warn=*/false);
3023 fprintf (stderr, "mangle_special_for_type = %s\n\n",
3024 IDENTIFIER_POINTER (result));
3029 /* Create an identifier for the mangled representation of the typeinfo
3030 structure for TYPE. */
3033 mangle_typeinfo_for_type (const tree type)
3035 return mangle_special_for_type (type, "TI");
3038 /* Create an identifier for the mangled name of the NTBS containing
3039 the mangled name of TYPE. */
3042 mangle_typeinfo_string_for_type (const tree type)
3044 return mangle_special_for_type (type, "TS");
3047 /* Create an identifier for the mangled name of the vtable for TYPE. */
3050 mangle_vtbl_for_type (const tree type)
3052 return mangle_special_for_type (type, "TV");
3055 /* Returns an identifier for the mangled name of the VTT for TYPE. */
3058 mangle_vtt_for_type (const tree type)
3060 return mangle_special_for_type (type, "TT");
3063 /* Return an identifier for a construction vtable group. TYPE is
3064 the most derived class in the hierarchy; BINFO is the base
3065 subobject for which this construction vtable group will be used.
3067 This mangling isn't part of the ABI specification; in the ABI
3068 specification, the vtable group is dumped in the same COMDAT as the
3069 main vtable, and is referenced only from that vtable, so it doesn't
3070 need an external name. For binary formats without COMDAT sections,
3071 though, we need external names for the vtable groups.
3073 We use the production
3075 <special-name> ::= CT <type> <offset number> _ <base type> */
3078 mangle_ctor_vtbl_for_type (const tree type, const tree binfo)
3082 start_mangling (type);
3084 write_string ("_Z");
3085 write_string ("TC");
3087 write_integer_cst (BINFO_OFFSET (binfo));
3089 write_type (BINFO_TYPE (binfo));
3091 result = finish_mangling_get_identifier (/*warn=*/false);
3093 fprintf (stderr, "mangle_ctor_vtbl_for_type = %s\n\n",
3094 IDENTIFIER_POINTER (result));
3098 /* Mangle a this pointer or result pointer adjustment.
3100 <call-offset> ::= h <fixed offset number> _
3101 ::= v <fixed offset number> _ <virtual offset number> _ */
3104 mangle_call_offset (const tree fixed_offset, const tree virtual_offset)
3106 write_char (virtual_offset ? 'v' : 'h');
3108 /* For either flavor, write the fixed offset. */
3109 write_integer_cst (fixed_offset);
3112 /* For a virtual thunk, add the virtual offset. */
3115 write_integer_cst (virtual_offset);
3120 /* Return an identifier for the mangled name of a this-adjusting or
3121 covariant thunk to FN_DECL. FIXED_OFFSET is the initial adjustment
3122 to this used to find the vptr. If VIRTUAL_OFFSET is non-NULL, this
3123 is a virtual thunk, and it is the vtbl offset in
3124 bytes. THIS_ADJUSTING is nonzero for a this adjusting thunk and
3125 zero for a covariant thunk. Note, that FN_DECL might be a covariant
3126 thunk itself. A covariant thunk name always includes the adjustment
3127 for the this pointer, even if there is none.
3129 <special-name> ::= T <call-offset> <base encoding>
3130 ::= Tc <this_adjust call-offset> <result_adjust call-offset>
3134 mangle_thunk (tree fn_decl, const int this_adjusting, tree fixed_offset,
3135 tree virtual_offset)
3139 start_mangling (fn_decl);
3141 write_string ("_Z");
3144 if (!this_adjusting)
3146 /* Covariant thunk with no this adjustment */
3148 mangle_call_offset (integer_zero_node, NULL_TREE);
3149 mangle_call_offset (fixed_offset, virtual_offset);
3151 else if (!DECL_THUNK_P (fn_decl))
3152 /* Plain this adjusting thunk. */
3153 mangle_call_offset (fixed_offset, virtual_offset);
3156 /* This adjusting thunk to covariant thunk. */
3158 mangle_call_offset (fixed_offset, virtual_offset);
3159 fixed_offset = ssize_int (THUNK_FIXED_OFFSET (fn_decl));
3160 virtual_offset = THUNK_VIRTUAL_OFFSET (fn_decl);
3162 virtual_offset = BINFO_VPTR_FIELD (virtual_offset);
3163 mangle_call_offset (fixed_offset, virtual_offset);
3164 fn_decl = THUNK_TARGET (fn_decl);
3168 write_encoding (fn_decl);
3170 result = finish_mangling_get_identifier (/*warn=*/false);
3172 fprintf (stderr, "mangle_thunk = %s\n\n", IDENTIFIER_POINTER (result));
3176 /* This hash table maps TYPEs to the IDENTIFIER for a conversion
3177 operator to TYPE. The nodes are IDENTIFIERs whose TREE_TYPE is the
3180 static GTY ((param_is (union tree_node))) htab_t conv_type_names;
3182 /* Hash a node (VAL1) in the table. */
3185 hash_type (const void *val)
3187 return (hashval_t) TYPE_UID (TREE_TYPE ((const_tree) val));
3190 /* Compare VAL1 (a node in the table) with VAL2 (a TYPE). */
3193 compare_type (const void *val1, const void *val2)
3195 return TREE_TYPE ((const_tree) val1) == (const_tree) val2;
3198 /* Return an identifier for the mangled unqualified name for a
3199 conversion operator to TYPE. This mangling is not specified by the
3200 ABI spec; it is only used internally. */
3203 mangle_conv_op_name_for_type (const tree type)
3208 if (type == error_mark_node)
3209 return error_mark_node;
3211 if (conv_type_names == NULL)
3212 conv_type_names = htab_create_ggc (31, &hash_type, &compare_type, NULL);
3214 slot = htab_find_slot_with_hash (conv_type_names, type,
3215 (hashval_t) TYPE_UID (type), INSERT);
3216 identifier = (tree)*slot;
3221 /* Create a unique name corresponding to TYPE. */
3222 sprintf (buffer, "operator %lu",
3223 (unsigned long) htab_elements (conv_type_names));
3224 identifier = get_identifier (buffer);
3227 /* Hang TYPE off the identifier so it can be found easily later
3228 when performing conversions. */
3229 TREE_TYPE (identifier) = type;
3231 /* Set bits on the identifier so we know later it's a conversion. */
3232 IDENTIFIER_OPNAME_P (identifier) = 1;
3233 IDENTIFIER_TYPENAME_P (identifier) = 1;
3239 /* Return an identifier for the name of an initialization guard
3240 variable for indicated VARIABLE. */
3243 mangle_guard_variable (const tree variable)
3245 start_mangling (variable);
3246 write_string ("_ZGV");
3247 if (strncmp (IDENTIFIER_POINTER (DECL_NAME (variable)), "_ZGR", 4) == 0)
3248 /* The name of a guard variable for a reference temporary should refer
3249 to the reference, not the temporary. */
3250 write_string (IDENTIFIER_POINTER (DECL_NAME (variable)) + 4);
3252 write_name (variable, /*ignore_local_scope=*/0);
3253 return finish_mangling_get_identifier (/*warn=*/false);
3256 /* Return an identifier for the name of a temporary variable used to
3257 initialize a static reference. This isn't part of the ABI, but we might
3258 as well call them something readable. */
3261 mangle_ref_init_variable (const tree variable)
3263 start_mangling (variable);
3264 write_string ("_ZGR");
3265 write_name (variable, /*ignore_local_scope=*/0);
3266 return finish_mangling_get_identifier (/*warn=*/false);
3270 /* Foreign language type mangling section. */
3272 /* How to write the type codes for the integer Java type. */
3275 write_java_integer_type_codes (const tree type)
3277 if (type == java_int_type_node)
3279 else if (type == java_short_type_node)
3281 else if (type == java_byte_type_node)
3283 else if (type == java_char_type_node)
3285 else if (type == java_long_type_node)
3287 else if (type == java_boolean_type_node)
3293 #include "gt-cp-mangle.h"