1 /* Language-dependent node constructors for parse phase of GNU compiler.
2 Copyright (C) 1987, 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
3 1999, 2000, 2001 Free Software Foundation, Inc.
4 Hacked by Michael Tiemann (tiemann@cygnus.com)
6 This file is part of GNU CC.
8 GNU CC is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GNU CC is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GNU CC; see the file COPYING. If not, write to
20 the Free Software Foundation, 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
32 #include "insn-config.h"
33 #include "integrate.h"
35 static tree bot_manip
PARAMS ((tree
*, int *, void *));
36 static tree bot_replace
PARAMS ((tree
*, int *, void *));
37 static tree build_cplus_array_type_1
PARAMS ((tree
, tree
));
38 static int list_hash_eq
PARAMS ((const void *, const void *));
39 static hashval_t list_hash_pieces
PARAMS ((tree
, tree
, tree
));
40 static hashval_t list_hash
PARAMS ((const void *));
41 static cp_lvalue_kind lvalue_p_1
PARAMS ((tree
, int));
42 static tree no_linkage_helper
PARAMS ((tree
*, int *, void *));
43 static tree build_srcloc
PARAMS ((const char *, int));
44 static tree mark_local_for_remap_r
PARAMS ((tree
*, int *, void *));
45 static tree cp_unsave_r
PARAMS ((tree
*, int *, void *));
46 static void cp_unsave
PARAMS ((tree
*));
47 static tree build_target_expr
PARAMS ((tree
, tree
));
48 static tree count_trees_r
PARAMS ((tree
*, int *, void *));
49 static tree verify_stmt_tree_r
PARAMS ((tree
*, int *, void *));
50 static tree find_tree_r
PARAMS ((tree
*, int *, void *));
51 extern int cp_statement_code_p
PARAMS ((enum tree_code
));
53 /* If REF is an lvalue, returns the kind of lvalue that REF is.
54 Otherwise, returns clk_none. If TREAT_CLASS_RVALUES_AS_LVALUES is
55 non-zero, rvalues of class type are considered lvalues. */
58 lvalue_p_1 (ref
, treat_class_rvalues_as_lvalues
)
60 int treat_class_rvalues_as_lvalues
;
62 cp_lvalue_kind op1_lvalue_kind
= clk_none
;
63 cp_lvalue_kind op2_lvalue_kind
= clk_none
;
65 if (TREE_CODE (TREE_TYPE (ref
)) == REFERENCE_TYPE
)
68 if (ref
== current_class_ptr
&& flag_this_is_variable
<= 0)
71 switch (TREE_CODE (ref
))
73 /* preincrements and predecrements are valid lvals, provided
74 what they refer to are valid lvals. */
75 case PREINCREMENT_EXPR
:
76 case PREDECREMENT_EXPR
:
80 case WITH_CLEANUP_EXPR
:
84 return lvalue_p_1 (TREE_OPERAND (ref
, 0),
85 treat_class_rvalues_as_lvalues
);
88 op1_lvalue_kind
= lvalue_p_1 (TREE_OPERAND (ref
, 0),
89 treat_class_rvalues_as_lvalues
);
91 /* The "field" can be a FUNCTION_DECL or an OVERLOAD in some
93 && TREE_CODE (TREE_OPERAND (ref
, 1)) == FIELD_DECL
94 && DECL_C_BIT_FIELD (TREE_OPERAND (ref
, 1)))
96 /* Clear the ordinary bit. If this object was a class
97 rvalue we want to preserve that information. */
98 op1_lvalue_kind
&= ~clk_ordinary
;
99 /* The lvalue is for a btifield. */
100 op1_lvalue_kind
|= clk_bitfield
;
102 return op1_lvalue_kind
;
108 if (TREE_READONLY (ref
) && ! TREE_STATIC (ref
)
109 && DECL_LANG_SPECIFIC (ref
)
110 && DECL_IN_AGGR_P (ref
))
116 if (TREE_CODE (TREE_TYPE (ref
)) != METHOD_TYPE
)
120 /* A currently unresolved scope ref. */
122 my_friendly_abort (103);
124 if (TREE_CODE (TREE_OPERAND (ref
, 1)) == FUNCTION_DECL
)
129 op1_lvalue_kind
= lvalue_p_1 (TREE_OPERAND (ref
, 0),
130 treat_class_rvalues_as_lvalues
);
131 op2_lvalue_kind
= lvalue_p_1 (TREE_OPERAND (ref
, 1),
132 treat_class_rvalues_as_lvalues
);
136 op1_lvalue_kind
= lvalue_p_1 (TREE_OPERAND (ref
, 1),
137 treat_class_rvalues_as_lvalues
);
138 op2_lvalue_kind
= lvalue_p_1 (TREE_OPERAND (ref
, 2),
139 treat_class_rvalues_as_lvalues
);
146 return lvalue_p_1 (TREE_OPERAND (ref
, 1),
147 treat_class_rvalues_as_lvalues
);
150 return treat_class_rvalues_as_lvalues
? clk_class
: clk_none
;
154 return ((treat_class_rvalues_as_lvalues
155 && IS_AGGR_TYPE (TREE_TYPE (ref
)))
156 ? clk_class
: clk_none
);
159 /* All functions (except non-static-member functions) are
161 return (DECL_NONSTATIC_MEMBER_FUNCTION_P (ref
)
162 ? clk_none
: clk_ordinary
);
168 /* If one operand is not an lvalue at all, then this expression is
170 if (!op1_lvalue_kind
|| !op2_lvalue_kind
)
173 /* Otherwise, it's an lvalue, and it has all the odd properties
174 contributed by either operand. */
175 op1_lvalue_kind
= op1_lvalue_kind
| op2_lvalue_kind
;
176 /* It's not an ordinary lvalue if it involves either a bit-field or
178 if ((op1_lvalue_kind
& ~clk_ordinary
) != clk_none
)
179 op1_lvalue_kind
&= ~clk_ordinary
;
180 return op1_lvalue_kind
;
183 /* If REF is an lvalue, returns the kind of lvalue that REF is.
184 Otherwise, returns clk_none. Lvalues can be assigned, unless they
185 have TREE_READONLY, or unless they are FUNCTION_DECLs. Lvalues can
186 have their address taken, unless they have DECL_REGISTER. */
192 return lvalue_p_1 (ref
, /*treat_class_rvalues_as_lvalues=*/0);
195 /* This differs from real_lvalue_p in that class rvalues are
196 considered lvalues. */
203 (lvalue_p_1 (ref
, /*treat_class_rvalues_as_lvalues=*/1) != clk_none
);
206 /* Return nonzero if REF is an lvalue valid for this language;
207 otherwise, print an error message and return zero. */
210 lvalue_or_else (ref
, string
)
214 int win
= lvalue_p (ref
);
216 error ("non-lvalue in %s", string
);
220 /* Build a TARGET_EXPR, initializing the DECL with the VALUE. */
223 build_target_expr (decl
, value
)
229 t
= build (TARGET_EXPR
, TREE_TYPE (decl
), decl
, value
,
230 maybe_build_cleanup (decl
), NULL_TREE
);
231 /* We always set TREE_SIDE_EFFECTS so that expand_expr does not
232 ignore the TARGET_EXPR. If there really turn out to be no
233 side-effects, then the optimizer should be able to get rid of
234 whatever code is generated anyhow. */
235 TREE_SIDE_EFFECTS (t
) = 1;
240 /* INIT is a CALL_EXPR which needs info about its target.
241 TYPE is the type that this initialization should appear to have.
243 Build an encapsulation of the initialization to perform
244 and return it so that it can be processed by language-independent
245 and language-specific expression expanders. */
248 build_cplus_new (type
, init
)
256 /* Make sure that we're not trying to create an instance of an
258 abstract_virtuals_error (NULL_TREE
, type
);
260 if (TREE_CODE (init
) != CALL_EXPR
&& TREE_CODE (init
) != AGGR_INIT_EXPR
)
261 return convert (type
, init
);
263 slot
= build (VAR_DECL
, type
);
264 DECL_ARTIFICIAL (slot
) = 1;
265 DECL_CONTEXT (slot
) = current_function_decl
;
266 layout_decl (slot
, 0);
268 /* We split the CALL_EXPR into its function and its arguments here.
269 Then, in expand_expr, we put them back together. The reason for
270 this is that this expression might be a default argument
271 expression. In that case, we need a new temporary every time the
272 expression is used. That's what break_out_target_exprs does; it
273 replaces every AGGR_INIT_EXPR with a copy that uses a fresh
274 temporary slot. Then, expand_expr builds up a call-expression
275 using the new slot. */
276 fn
= TREE_OPERAND (init
, 0);
277 rval
= build (AGGR_INIT_EXPR
, type
, fn
, TREE_OPERAND (init
, 1), slot
);
278 TREE_SIDE_EFFECTS (rval
) = 1;
279 AGGR_INIT_VIA_CTOR_P (rval
)
280 = (TREE_CODE (fn
) == ADDR_EXPR
281 && TREE_CODE (TREE_OPERAND (fn
, 0)) == FUNCTION_DECL
282 && DECL_CONSTRUCTOR_P (TREE_OPERAND (fn
, 0)));
283 rval
= build_target_expr (slot
, rval
);
288 /* Buidl a TARGET_EXPR using INIT to initialize a new temporary of the
292 build_target_expr_with_type (init
, type
)
299 if (TREE_CODE (init
) == TARGET_EXPR
)
302 slot
= build (VAR_DECL
, type
);
303 DECL_ARTIFICIAL (slot
) = 1;
304 DECL_CONTEXT (slot
) = current_function_decl
;
305 layout_decl (slot
, 0);
306 rval
= build_target_expr (slot
, init
);
311 /* Like build_target_expr_with_type, but use the type of INIT. */
314 get_target_expr (init
)
317 return build_target_expr_with_type (init
, TREE_TYPE (init
));
320 /* Recursively perform a preorder search EXP for CALL_EXPRs, making
321 copies where they are found. Returns a deep copy all nodes transitively
322 containing CALL_EXPRs. */
325 break_out_calls (exp
)
328 register tree t1
, t2
= NULL_TREE
;
329 register enum tree_code code
;
330 register int changed
= 0;
333 if (exp
== NULL_TREE
)
336 code
= TREE_CODE (exp
);
338 if (code
== CALL_EXPR
)
339 return copy_node (exp
);
341 /* Don't try and defeat a save_expr, as it should only be done once. */
342 if (code
== SAVE_EXPR
)
345 switch (TREE_CODE_CLASS (code
))
350 case 'c': /* a constant */
351 case 't': /* a type node */
352 case 'x': /* something random, like an identifier or an ERROR_MARK. */
355 case 'd': /* A decl node */
356 #if 0 /* This is bogus. jason 9/21/94 */
358 t1
= break_out_calls (DECL_INITIAL (exp
));
359 if (t1
!= DECL_INITIAL (exp
))
361 exp
= copy_node (exp
);
362 DECL_INITIAL (exp
) = t1
;
367 case 'b': /* A block node */
369 /* Don't know how to handle these correctly yet. Must do a
370 break_out_calls on all DECL_INITIAL values for local variables,
371 and also break_out_calls on all sub-blocks and sub-statements. */
376 case 'e': /* an expression */
377 case 'r': /* a reference */
378 case 's': /* an expression with side effects */
379 for (i
= TREE_CODE_LENGTH (code
) - 1; i
>= 0; i
--)
381 t1
= break_out_calls (TREE_OPERAND (exp
, i
));
382 if (t1
!= TREE_OPERAND (exp
, i
))
384 exp
= copy_node (exp
);
385 TREE_OPERAND (exp
, i
) = t1
;
390 case '<': /* a comparison expression */
391 case '2': /* a binary arithmetic expression */
392 t2
= break_out_calls (TREE_OPERAND (exp
, 1));
393 if (t2
!= TREE_OPERAND (exp
, 1))
395 case '1': /* a unary arithmetic expression */
396 t1
= break_out_calls (TREE_OPERAND (exp
, 0));
397 if (t1
!= TREE_OPERAND (exp
, 0))
401 if (TREE_CODE_LENGTH (code
) == 1)
402 return build1 (code
, TREE_TYPE (exp
), t1
);
404 return build (code
, TREE_TYPE (exp
), t1
, t2
);
411 /* Here is how primitive or already-canonicalized types' hash
412 codes are made. MUST BE CONSISTENT WITH tree.c !!! */
413 #define TYPE_HASH(TYPE) ((HOST_WIDE_INT) (TYPE) & 0777777)
415 /* Construct, lay out and return the type of methods belonging to class
416 BASETYPE and whose arguments are described by ARGTYPES and whose values
417 are described by RETTYPE. If each type exists already, reuse it. */
420 build_cplus_method_type (basetype
, rettype
, argtypes
)
421 tree basetype
, rettype
, argtypes
;
427 /* Make a node of the sort we want. */
428 t
= make_node (METHOD_TYPE
);
430 TYPE_METHOD_BASETYPE (t
) = TYPE_MAIN_VARIANT (basetype
);
431 TREE_TYPE (t
) = rettype
;
432 ptype
= build_pointer_type (basetype
);
434 /* The actual arglist for this function includes a "hidden" argument
435 which is "this". Put it into the list of argument types. */
436 argtypes
= tree_cons (NULL_TREE
, ptype
, argtypes
);
437 TYPE_ARG_TYPES (t
) = argtypes
;
438 TREE_SIDE_EFFECTS (argtypes
) = 1; /* Mark first argtype as "artificial". */
440 /* If we already have such a type, use the old one and free this one.
441 Note that it also frees up the above cons cell if found. */
442 hashcode
= TYPE_HASH (basetype
) + TYPE_HASH (rettype
) +
443 type_hash_list (argtypes
);
445 t
= type_hash_canon (hashcode
, t
);
447 if (!COMPLETE_TYPE_P (t
))
454 build_cplus_array_type_1 (elt_type
, index_type
)
460 if (elt_type
== error_mark_node
|| index_type
== error_mark_node
)
461 return error_mark_node
;
463 if (processing_template_decl
464 || uses_template_parms (elt_type
)
465 || uses_template_parms (index_type
))
467 t
= make_node (ARRAY_TYPE
);
468 TREE_TYPE (t
) = elt_type
;
469 TYPE_DOMAIN (t
) = index_type
;
472 t
= build_array_type (elt_type
, index_type
);
474 /* Push these needs up so that initialization takes place
476 TYPE_NEEDS_CONSTRUCTING (t
)
477 = TYPE_NEEDS_CONSTRUCTING (TYPE_MAIN_VARIANT (elt_type
));
478 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (t
)
479 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TYPE_MAIN_VARIANT (elt_type
));
484 build_cplus_array_type (elt_type
, index_type
)
489 int type_quals
= CP_TYPE_QUALS (elt_type
);
491 elt_type
= TYPE_MAIN_VARIANT (elt_type
);
493 t
= build_cplus_array_type_1 (elt_type
, index_type
);
495 if (type_quals
!= TYPE_UNQUALIFIED
)
496 t
= cp_build_qualified_type (t
, type_quals
);
501 /* Make a variant of TYPE, qualified with the TYPE_QUALS. Handles
502 arrays correctly. In particular, if TYPE is an array of T's, and
503 TYPE_QUALS is non-empty, returns an array of qualified T's. If
504 at attempt is made to qualify a type illegally, and COMPLAIN is
505 non-zero, an error is issued. If COMPLAIN is zero, error_mark_node
509 cp_build_qualified_type_real (type
, type_quals
, complain
)
516 if (type
== error_mark_node
)
519 if (type_quals
== TYPE_QUALS (type
))
522 /* A restrict-qualified pointer type must be a pointer (or reference)
523 to object or incomplete type. */
524 if ((type_quals
& TYPE_QUAL_RESTRICT
)
525 && TREE_CODE (type
) != TEMPLATE_TYPE_PARM
526 && (!POINTER_TYPE_P (type
)
527 || TYPE_PTRMEM_P (type
)
528 || TREE_CODE (TREE_TYPE (type
)) == FUNCTION_TYPE
))
531 cp_error ("`%T' cannot be `restrict'-qualified", type
);
533 return error_mark_node
;
535 type_quals
&= ~TYPE_QUAL_RESTRICT
;
538 if (type_quals
!= TYPE_UNQUALIFIED
539 && TREE_CODE (type
) == FUNCTION_TYPE
)
542 cp_error ("`%T' cannot be `const'-, `volatile'-, or `restrict'-qualified", type
);
544 return error_mark_node
;
545 type_quals
= TYPE_UNQUALIFIED
;
547 else if (TREE_CODE (type
) == ARRAY_TYPE
)
549 /* In C++, the qualification really applies to the array element
550 type. Obtain the appropriately qualified element type. */
553 = cp_build_qualified_type_real (TREE_TYPE (type
),
557 if (element_type
== error_mark_node
)
558 return error_mark_node
;
560 /* See if we already have an identically qualified type. */
561 for (t
= TYPE_MAIN_VARIANT (type
); t
; t
= TYPE_NEXT_VARIANT (t
))
562 if (CP_TYPE_QUALS (t
) == type_quals
)
565 /* If we didn't already have it, create it now. */
568 /* Make a new array type, just like the old one, but with the
569 appropriately qualified element type. */
570 t
= build_type_copy (type
);
571 TREE_TYPE (t
) = element_type
;
574 /* Even if we already had this variant, we update
575 TYPE_NEEDS_CONSTRUCTING and TYPE_HAS_NONTRIVIAL_DESTRUCTOR in case
576 they changed since the variant was originally created.
578 This seems hokey; if there is some way to use a previous
579 variant *without* coming through here,
580 TYPE_NEEDS_CONSTRUCTING will never be updated. */
581 TYPE_NEEDS_CONSTRUCTING (t
)
582 = TYPE_NEEDS_CONSTRUCTING (TYPE_MAIN_VARIANT (element_type
));
583 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (t
)
584 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TYPE_MAIN_VARIANT (element_type
));
587 else if (TYPE_PTRMEMFUNC_P (type
))
589 /* For a pointer-to-member type, we can't just return a
590 cv-qualified version of the RECORD_TYPE. If we do, we
591 haven't change the field that contains the actual pointer to
592 a method, and so TYPE_PTRMEMFUNC_FN_TYPE will be wrong. */
595 t
= TYPE_PTRMEMFUNC_FN_TYPE (type
);
596 t
= cp_build_qualified_type_real (t
, type_quals
, complain
);
597 return build_ptrmemfunc_type (t
);
600 /* Retrieve (or create) the appropriately qualified variant. */
601 result
= build_qualified_type (type
, type_quals
);
603 /* If this was a pointer-to-method type, and we just made a copy,
604 then we need to clear the cached associated
605 pointer-to-member-function type; it is not valid for the new
608 && TREE_CODE (type
) == POINTER_TYPE
609 && TREE_CODE (TREE_TYPE (type
)) == METHOD_TYPE
)
610 TYPE_SET_PTRMEMFUNC_TYPE (result
, NULL_TREE
);
615 /* Returns the canonical version of TYPE. In other words, if TYPE is
616 a typedef, returns the underlying type. The cv-qualification of
617 the type returned matches the type input; they will always be
621 canonical_type_variant (t
)
624 return cp_build_qualified_type (TYPE_MAIN_VARIANT (t
), CP_TYPE_QUALS (t
));
627 /* Makes new binfos for the indirect bases under BINFO, and updates
628 BINFO_OFFSET for them and their bases. */
631 unshare_base_binfos (binfo
)
634 tree binfos
= BINFO_BASETYPES (binfo
);
638 if (binfos
== NULL_TREE
)
641 /* Now unshare the structure beneath BINFO. */
642 for (j
= TREE_VEC_LENGTH (binfos
)-1;
645 tree base_binfo
= TREE_VEC_ELT (binfos
, j
);
646 new_binfo
= TREE_VEC_ELT (binfos
, j
)
647 = make_binfo (BINFO_OFFSET (base_binfo
),
649 BINFO_VTABLE (base_binfo
),
650 BINFO_VIRTUALS (base_binfo
));
651 TREE_VIA_PUBLIC (new_binfo
) = TREE_VIA_PUBLIC (base_binfo
);
652 TREE_VIA_PROTECTED (new_binfo
) = TREE_VIA_PROTECTED (base_binfo
);
653 TREE_VIA_VIRTUAL (new_binfo
) = TREE_VIA_VIRTUAL (base_binfo
);
654 BINFO_INHERITANCE_CHAIN (new_binfo
) = binfo
;
655 BINFO_PRIMARY_BASE_OF (new_binfo
) = NULL_TREE
;
656 unshare_base_binfos (new_binfo
);
661 /* Hashing of lists so that we don't make duplicates.
662 The entry point is `list_hash_canon'. */
664 /* Now here is the hash table. When recording a list, it is added
665 to the slot whose index is the hash code mod the table size.
666 Note that the hash table is used for several kinds of lists.
667 While all these live in the same table, they are completely independent,
668 and the hash code is computed differently for each of these. */
670 static htab_t list_hash_table
;
679 /* Compare ENTRY (an entry in the hash table) with DATA (a list_proxy
680 for a node we are thinking about adding). */
683 list_hash_eq (entry
, data
)
687 tree t
= (tree
) entry
;
688 struct list_proxy
*proxy
= (struct list_proxy
*) data
;
690 return (TREE_VALUE (t
) == proxy
->value
691 && TREE_PURPOSE (t
) == proxy
->purpose
692 && TREE_CHAIN (t
) == proxy
->chain
);
695 /* Compute a hash code for a list (chain of TREE_LIST nodes
696 with goodies in the TREE_PURPOSE, TREE_VALUE, and bits of the
697 TREE_COMMON slots), by adding the hash codes of the individual entries. */
700 list_hash_pieces (purpose
, value
, chain
)
705 hashval_t hashcode
= 0;
708 hashcode
+= TYPE_HASH (chain
);
711 hashcode
+= TYPE_HASH (value
);
715 hashcode
+= TYPE_HASH (purpose
);
721 /* Hash an already existing TREE_LIST. */
728 return list_hash_pieces (TREE_PURPOSE (t
),
733 /* Given list components PURPOSE, VALUE, AND CHAIN, return the canonical
734 object for an identical list if one already exists. Otherwise, build a
735 new one, and record it as the canonical object. */
738 hash_tree_cons (purpose
, value
, chain
)
739 tree purpose
, value
, chain
;
743 struct list_proxy proxy
;
745 /* Hash the list node. */
746 hashcode
= list_hash_pieces (purpose
, value
, chain
);
747 /* Create a proxy for the TREE_LIST we would like to create. We
748 don't actually create it so as to avoid creating garbage. */
749 proxy
.purpose
= purpose
;
752 /* See if it is already in the table. */
753 slot
= htab_find_slot_with_hash (list_hash_table
, &proxy
, hashcode
,
755 /* If not, create a new node. */
757 *slot
= (PTR
) tree_cons (purpose
, value
, chain
);
761 /* Constructor for hashed lists. */
764 hash_tree_chain (value
, chain
)
767 return hash_tree_cons (NULL_TREE
, value
, chain
);
770 /* Similar, but used for concatenating two lists. */
773 hash_chainon (list1
, list2
)
780 if (TREE_CHAIN (list1
) == NULL_TREE
)
781 return hash_tree_chain (TREE_VALUE (list1
), list2
);
782 return hash_tree_chain (TREE_VALUE (list1
),
783 hash_chainon (TREE_CHAIN (list1
), list2
));
786 /* Build an association between TYPE and some parameters:
788 OFFSET is the offset added to `this' to convert it to a pointer
791 BINFO is the base binfo to use, if we are deriving from one. This
792 is necessary, as we want specialized parent binfos from base
793 classes, so that the VTABLE_NAMEs of bases are for the most derived
794 type, instead of the simple type.
796 VTABLE is the virtual function table with which to initialize
797 sub-objects of type TYPE.
799 VIRTUALS are the virtual functions sitting in VTABLE. */
802 make_binfo (offset
, binfo
, vtable
, virtuals
)
804 tree vtable
, virtuals
;
806 tree new_binfo
= make_tree_vec (11);
809 if (TREE_CODE (binfo
) == TREE_VEC
)
810 type
= BINFO_TYPE (binfo
);
814 binfo
= CLASS_TYPE_P (type
) ? TYPE_BINFO (binfo
) : NULL_TREE
;
817 TREE_TYPE (new_binfo
) = TYPE_MAIN_VARIANT (type
);
818 BINFO_OFFSET (new_binfo
) = offset
;
819 BINFO_VTABLE (new_binfo
) = vtable
;
820 BINFO_VIRTUALS (new_binfo
) = virtuals
;
822 if (binfo
&& BINFO_BASETYPES (binfo
) != NULL_TREE
)
823 BINFO_BASETYPES (new_binfo
) = copy_node (BINFO_BASETYPES (binfo
));
827 /* Return the binfo value for ELEM in TYPE. */
830 binfo_value (elem
, type
)
834 if (get_base_distance (elem
, type
, 0, (tree
*)0) == -2)
835 compiler_error ("base class `%s' ambiguous in binfo_value",
836 TYPE_NAME_STRING (elem
));
838 return TYPE_BINFO (type
);
839 if (TREE_CODE (elem
) == RECORD_TYPE
&& TYPE_BINFO (elem
) == type
)
841 return get_binfo (elem
, type
, 0);
844 /* Return a TREE_LIST whose TREE_VALUE nodes along the
845 BINFO_INHERITANCE_CHAIN for BINFO, but in the opposite order. In
846 other words, while the BINFO_INHERITANCE_CHAIN goes from base
847 classes to derived classes, the reversed path goes from derived
848 classes to base classes. */
856 reversed_path
= NULL_TREE
;
859 reversed_path
= tree_cons (NULL_TREE
, binfo
, reversed_path
);
860 binfo
= BINFO_INHERITANCE_CHAIN (binfo
);
863 return reversed_path
;
873 fprintf (stderr
, "type \"%s\", offset = ",
874 TYPE_NAME_STRING (BINFO_TYPE (elem
)));
875 fprintf (stderr
, HOST_WIDE_INT_PRINT_DEC
,
876 TREE_INT_CST_LOW (BINFO_OFFSET (elem
)));
877 fprintf (stderr
, "\nvtable type:\n");
878 debug_tree (BINFO_TYPE (elem
));
879 if (BINFO_VTABLE (elem
))
880 fprintf (stderr
, "vtable decl \"%s\"\n",
881 IDENTIFIER_POINTER (DECL_NAME (get_vtbl_decl_for_binfo (elem
))));
883 fprintf (stderr
, "no vtable decl yet\n");
884 fprintf (stderr
, "virtuals:\n");
885 virtuals
= BINFO_VIRTUALS (elem
);
886 n
= first_vfun_index (BINFO_TYPE (elem
));
890 tree fndecl
= TREE_VALUE (virtuals
);
891 fprintf (stderr
, "%s [%ld =? %ld]\n",
892 IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (fndecl
)),
893 (long) n
, (long) TREE_INT_CST_LOW (DECL_VINDEX (fndecl
)));
895 virtuals
= TREE_CHAIN (virtuals
);
904 if (TREE_CODE (t
) == FUNCTION_DECL
)
906 else if (TREE_CODE (t
) == OVERLOAD
)
908 for (i
=0; t
; t
= OVL_CHAIN (t
))
913 my_friendly_abort (359);
921 /* A baselink is also considered an overloaded function. */
922 if (TREE_CODE (x
) == OFFSET_REF
)
923 x
= TREE_OPERAND (x
, 1);
926 return (TREE_CODE (x
) == FUNCTION_DECL
927 || TREE_CODE (x
) == TEMPLATE_ID_EXPR
928 || DECL_FUNCTION_TEMPLATE_P (x
)
929 || TREE_CODE (x
) == OVERLOAD
);
933 really_overloaded_fn (x
)
936 /* A baselink is also considered an overloaded function. */
937 if (TREE_CODE (x
) == OFFSET_REF
)
938 x
= TREE_OPERAND (x
, 1);
941 return (TREE_CODE (x
) == OVERLOAD
942 && (TREE_CHAIN (x
) != NULL_TREE
943 || DECL_FUNCTION_TEMPLATE_P (OVL_FUNCTION (x
))));
950 my_friendly_assert (is_overloaded_fn (from
), 9);
951 /* A baselink is also considered an overloaded function. */
952 if (BASELINK_P (from
))
953 from
= TREE_VALUE (from
);
954 return OVL_CURRENT (from
);
957 /* Returns nonzero if T is a ->* or .* expression that refers to a
964 return (TREE_CODE (t
) == OFFSET_REF
965 && TYPE_PTRMEMFUNC_P (TREE_TYPE (TREE_OPERAND (t
, 1))));
968 /* Return a new OVL node, concatenating it with the old one. */
971 ovl_cons (decl
, chain
)
975 tree result
= make_node (OVERLOAD
);
976 TREE_TYPE (result
) = unknown_type_node
;
977 OVL_FUNCTION (result
) = decl
;
978 TREE_CHAIN (result
) = chain
;
983 /* Build a new overloaded function. If this is the first one,
984 just return it; otherwise, ovl_cons the _DECLs */
987 build_overload (decl
, chain
)
991 if (! chain
&& TREE_CODE (decl
) != TEMPLATE_DECL
)
993 if (chain
&& TREE_CODE (chain
) != OVERLOAD
)
994 chain
= ovl_cons (chain
, NULL_TREE
);
995 return ovl_cons (decl
, chain
);
998 /* True if fn is in ovl. */
1001 ovl_member (fn
, ovl
)
1005 if (ovl
== NULL_TREE
)
1007 if (TREE_CODE (ovl
) != OVERLOAD
)
1009 for (; ovl
; ovl
= OVL_CHAIN (ovl
))
1010 if (OVL_FUNCTION (ovl
) == fn
)
1016 is_aggr_type_2 (t1
, t2
)
1019 if (TREE_CODE (t1
) != TREE_CODE (t2
))
1021 return IS_AGGR_TYPE (t1
) && IS_AGGR_TYPE (t2
);
1024 /* Returns non-zero if CODE is the code for a statement. */
1027 cp_statement_code_p (code
)
1028 enum tree_code code
;
1034 case START_CATCH_STMT
:
1036 case CTOR_INITIALIZER
:
1047 #define PRINT_RING_SIZE 4
1050 lang_printable_name (decl
, v
)
1054 static tree decl_ring
[PRINT_RING_SIZE
];
1055 static char *print_ring
[PRINT_RING_SIZE
];
1056 static int ring_counter
;
1059 /* Only cache functions. */
1061 || TREE_CODE (decl
) != FUNCTION_DECL
1062 || DECL_LANG_SPECIFIC (decl
) == 0)
1063 return lang_decl_name (decl
, v
);
1065 /* See if this print name is lying around. */
1066 for (i
= 0; i
< PRINT_RING_SIZE
; i
++)
1067 if (decl_ring
[i
] == decl
)
1068 /* yes, so return it. */
1069 return print_ring
[i
];
1071 if (++ring_counter
== PRINT_RING_SIZE
)
1074 if (current_function_decl
!= NULL_TREE
)
1076 if (decl_ring
[ring_counter
] == current_function_decl
)
1078 if (ring_counter
== PRINT_RING_SIZE
)
1080 if (decl_ring
[ring_counter
] == current_function_decl
)
1081 my_friendly_abort (106);
1084 if (print_ring
[ring_counter
])
1085 free (print_ring
[ring_counter
]);
1087 print_ring
[ring_counter
] = xstrdup (lang_decl_name (decl
, v
));
1088 decl_ring
[ring_counter
] = decl
;
1089 return print_ring
[ring_counter
];
1092 /* Build the FUNCTION_TYPE or METHOD_TYPE which may throw exceptions
1093 listed in RAISES. */
1096 build_exception_variant (type
, raises
)
1100 tree v
= TYPE_MAIN_VARIANT (type
);
1101 int type_quals
= TYPE_QUALS (type
);
1103 for (; v
; v
= TYPE_NEXT_VARIANT (v
))
1104 if (TYPE_QUALS (v
) == type_quals
1105 && comp_except_specs (raises
, TYPE_RAISES_EXCEPTIONS (v
), 1))
1108 /* Need to build a new variant. */
1109 v
= build_type_copy (type
);
1110 TYPE_RAISES_EXCEPTIONS (v
) = raises
;
1114 /* Given a TEMPLATE_TEMPLATE_PARM or BOUND_TEMPLATE_TEMPLATE_PARM
1115 node T, create a new one together with its
1116 lang_specific field and its corresponding *_DECL node.
1117 If NEWARGS is not NULL_TREE, this parameter is bound with new set of
1121 copy_template_template_parm (t
, newargs
)
1125 tree decl
= TYPE_NAME (t
);
1128 if (newargs
== NULL_TREE
)
1130 t2
= make_aggr_type (TREE_CODE (t
));
1131 decl
= copy_decl (decl
);
1133 /* No need to copy these. */
1134 TEMPLATE_TYPE_PARM_INDEX (t2
) = TEMPLATE_TYPE_PARM_INDEX (t
);
1135 TEMPLATE_TEMPLATE_PARM_TEMPLATE_INFO (t2
)
1136 = TEMPLATE_TEMPLATE_PARM_TEMPLATE_INFO (t
);
1140 t2
= make_aggr_type (BOUND_TEMPLATE_TEMPLATE_PARM
);
1141 decl
= build_decl (TYPE_DECL
, DECL_NAME (decl
), NULL_TREE
);
1143 /* These nodes have to be created to reflect new TYPE_DECL and template
1145 TEMPLATE_TYPE_PARM_INDEX (t2
) = copy_node (TEMPLATE_TYPE_PARM_INDEX (t
));
1146 TEMPLATE_PARM_DECL (TEMPLATE_TYPE_PARM_INDEX (t2
)) = decl
;
1147 TEMPLATE_TEMPLATE_PARM_TEMPLATE_INFO (t2
)
1148 = tree_cons (TEMPLATE_TEMPLATE_PARM_TEMPLATE_DECL (t
),
1149 newargs
, NULL_TREE
);
1152 TREE_TYPE (decl
) = t2
;
1153 TYPE_NAME (t2
) = decl
;
1154 TYPE_STUB_DECL (t2
) = decl
;
1159 /* Apply FUNC to all the sub-trees of TP in a pre-order traversal.
1160 FUNC is called with the DATA and the address of each sub-tree. If
1161 FUNC returns a non-NULL value, the traversal is aborted, and the
1162 value returned by FUNC is returned. If HTAB is non-NULL it is used
1163 to record the nodes visited, and to avoid visiting a node more than
1167 walk_tree (tp
, func
, data
, htab
)
1173 enum tree_code code
;
1177 #define WALK_SUBTREE(NODE) \
1180 result = walk_tree (&(NODE), func, data, htab); \
1186 /* Skip empty subtrees. */
1192 /* Don't walk the same tree twice, if the user has requested that we
1194 if (htab_find (htab
, *tp
))
1196 /* If we haven't already seen this node, add it to the table. */
1197 slot
= htab_find_slot (htab
, *tp
, INSERT
);
1201 /* Call the function. */
1203 result
= (*func
) (tp
, &walk_subtrees
, data
);
1205 /* If we found something, return it. */
1209 /* Even if we didn't, FUNC may have decided that there was nothing
1210 interesting below this point in the tree. */
1214 code
= TREE_CODE (*tp
);
1216 /* Handle common cases up front. */
1217 if (IS_EXPR_CODE_CLASS (TREE_CODE_CLASS (code
))
1218 || TREE_CODE_CLASS (code
) == 'r'
1219 || TREE_CODE_CLASS (code
) == 's')
1223 /* Set lineno here so we get the right instantiation context
1224 if we call instantiate_decl from inlinable_function_p. */
1225 if (statement_code_p (code
) && !STMT_LINENO_FOR_FN_P (*tp
))
1226 lineno
= STMT_LINENO (*tp
);
1228 /* Walk over all the sub-trees of this operand. */
1229 len
= first_rtl_op (code
);
1230 /* TARGET_EXPRs are peculiar: operands 1 and 3 can be the same.
1231 But, we only want to walk once. */
1232 if (code
== TARGET_EXPR
1233 && TREE_OPERAND (*tp
, 3) == TREE_OPERAND (*tp
, 1))
1235 /* Go through the subtrees. We need to do this in forward order so
1236 that the scope of a FOR_EXPR is handled properly. */
1237 for (i
= 0; i
< len
; ++i
)
1238 WALK_SUBTREE (TREE_OPERAND (*tp
, i
));
1240 /* For statements, we also walk the chain so that we cover the
1241 entire statement tree. */
1242 if (statement_code_p (code
))
1244 if (code
== DECL_STMT
1245 && DECL_STMT_DECL (*tp
)
1246 && DECL_P (DECL_STMT_DECL (*tp
)))
1248 /* Walk the DECL_INITIAL and DECL_SIZE. We don't want to walk
1249 into declarations that are just mentioned, rather than
1250 declared; they don't really belong to this part of the tree.
1251 And, we can see cycles: the initializer for a declaration can
1252 refer to the declaration itself. */
1253 WALK_SUBTREE (DECL_INITIAL (DECL_STMT_DECL (*tp
)));
1254 WALK_SUBTREE (DECL_SIZE (DECL_STMT_DECL (*tp
)));
1255 WALK_SUBTREE (DECL_SIZE_UNIT (DECL_STMT_DECL (*tp
)));
1258 /* This can be tail-recursion optimized if we write it this way. */
1259 return walk_tree (&TREE_CHAIN (*tp
), func
, data
, htab
);
1262 /* We didn't find what we were looking for. */
1265 else if (TREE_CODE_CLASS (code
) == 'd')
1267 WALK_SUBTREE (TREE_TYPE (*tp
));
1269 /* We didn't find what we were looking for. */
1273 /* Not one of the easy cases. We must explicitly go through the
1278 case IDENTIFIER_NODE
:
1283 case TEMPLATE_TEMPLATE_PARM
:
1284 case BOUND_TEMPLATE_TEMPLATE_PARM
:
1285 case TEMPLATE_PARM_INDEX
:
1286 case TEMPLATE_TYPE_PARM
:
1297 /* None of thse have subtrees other than those already walked
1302 WALK_SUBTREE (TREE_TYPE (*tp
));
1306 case REFERENCE_TYPE
:
1307 WALK_SUBTREE (TREE_TYPE (*tp
));
1311 /* A BASELINK_P's TREE_PURPOSE is a BINFO, and hence circular. */
1312 if (!BASELINK_P (*tp
))
1313 WALK_SUBTREE (TREE_PURPOSE (*tp
));
1314 WALK_SUBTREE (TREE_VALUE (*tp
));
1315 WALK_SUBTREE (TREE_CHAIN (*tp
));
1319 WALK_SUBTREE (OVL_FUNCTION (*tp
));
1320 WALK_SUBTREE (OVL_CHAIN (*tp
));
1325 int len
= TREE_VEC_LENGTH (*tp
);
1327 WALK_SUBTREE (TREE_VEC_ELT (*tp
, len
));
1332 WALK_SUBTREE (TREE_REALPART (*tp
));
1333 WALK_SUBTREE (TREE_IMAGPART (*tp
));
1337 WALK_SUBTREE (CONSTRUCTOR_ELTS (*tp
));
1341 WALK_SUBTREE (TYPE_METHOD_BASETYPE (*tp
));
1345 WALK_SUBTREE (TREE_TYPE (*tp
));
1347 tree arg
= TYPE_ARG_TYPES (*tp
);
1349 /* We never want to walk into default arguments. */
1350 for (; arg
; arg
= TREE_CHAIN (arg
))
1351 WALK_SUBTREE (TREE_VALUE (arg
));
1356 WALK_SUBTREE (TREE_TYPE (*tp
));
1357 WALK_SUBTREE (TYPE_DOMAIN (*tp
));
1361 WALK_SUBTREE (TYPE_MIN_VALUE (*tp
));
1362 WALK_SUBTREE (TYPE_MAX_VALUE (*tp
));
1366 WALK_SUBTREE (TREE_TYPE (*tp
));
1367 WALK_SUBTREE (TYPE_OFFSET_BASETYPE (*tp
));
1371 if (TYPE_PTRMEMFUNC_P (*tp
))
1372 WALK_SUBTREE (TYPE_PTRMEMFUNC_FN_TYPE (*tp
));
1376 my_friendly_abort (19990803);
1379 /* We didn't find what we were looking for. */
1385 /* Like walk_tree, but does not walk duplicate nodes more than
1389 walk_tree_without_duplicates (tp
, func
, data
)
1397 htab
= htab_create (37, htab_hash_pointer
, htab_eq_pointer
, NULL
);
1398 result
= walk_tree (tp
, func
, data
, htab
);
1403 /* Called from count_trees via walk_tree. */
1406 count_trees_r (tp
, walk_subtrees
, data
)
1407 tree
*tp ATTRIBUTE_UNUSED
;
1408 int *walk_subtrees ATTRIBUTE_UNUSED
;
1415 /* Debugging function for measuring the rough complexity of a tree
1423 walk_tree_without_duplicates (&t
, count_trees_r
, &n_trees
);
1427 /* Called from verify_stmt_tree via walk_tree. */
1430 verify_stmt_tree_r (tp
, walk_subtrees
, data
)
1432 int *walk_subtrees ATTRIBUTE_UNUSED
;
1436 htab_t
*statements
= (htab_t
*) data
;
1439 if (!statement_code_p (TREE_CODE (t
)))
1442 /* If this statement is already present in the hash table, then
1443 there is a circularity in the statement tree. */
1444 if (htab_find (*statements
, t
))
1445 my_friendly_abort (20000727);
1447 slot
= htab_find_slot (*statements
, t
, INSERT
);
1453 /* Debugging function to check that the statement T has not been
1454 corrupted. For now, this function simply checks that T contains no
1458 verify_stmt_tree (t
)
1462 statements
= htab_create (37, htab_hash_pointer
, htab_eq_pointer
, NULL
);
1463 walk_tree (&t
, verify_stmt_tree_r
, &statements
, NULL
);
1464 htab_delete (statements
);
1467 /* Called from find_tree via walk_tree. */
1470 find_tree_r (tp
, walk_subtrees
, data
)
1472 int *walk_subtrees ATTRIBUTE_UNUSED
;
1475 if (*tp
== (tree
) data
)
1481 /* Returns X if X appears in the tree structure rooted at T. */
1488 return walk_tree_without_duplicates (&t
, find_tree_r
, x
);
1491 /* Passed to walk_tree. Checks for the use of types with no linkage. */
1494 no_linkage_helper (tp
, walk_subtrees
, data
)
1496 int *walk_subtrees ATTRIBUTE_UNUSED
;
1497 void *data ATTRIBUTE_UNUSED
;
1502 && (CLASS_TYPE_P (t
) || TREE_CODE (t
) == ENUMERAL_TYPE
)
1503 && (decl_function_context (TYPE_MAIN_DECL (t
))
1504 || ANON_AGGRNAME_P (TYPE_IDENTIFIER (t
))))
1509 /* Check if the type T depends on a type with no linkage and if so, return
1513 no_linkage_check (t
)
1516 /* There's no point in checking linkage on template functions; we
1517 can't know their complete types. */
1518 if (processing_template_decl
)
1521 t
= walk_tree_without_duplicates (&t
, no_linkage_helper
, NULL
);
1522 if (t
!= error_mark_node
)
1527 /* Passed to walk_tree. Copies the node pointed to, if appropriate. */
1530 copy_tree_r (tp
, walk_subtrees
, data
)
1533 void *data ATTRIBUTE_UNUSED
;
1535 enum tree_code code
= TREE_CODE (*tp
);
1537 /* We make copies of most nodes. */
1538 if (IS_EXPR_CODE_CLASS (TREE_CODE_CLASS (code
))
1539 || TREE_CODE_CLASS (code
) == 'r'
1540 || TREE_CODE_CLASS (code
) == 'c'
1541 || TREE_CODE_CLASS (code
) == 's'
1542 || code
== TREE_LIST
1544 || code
== OVERLOAD
)
1546 /* Because the chain gets clobbered when we make a copy, we save it
1548 tree chain
= TREE_CHAIN (*tp
);
1550 /* Copy the node. */
1551 *tp
= copy_node (*tp
);
1553 /* Now, restore the chain, if appropriate. That will cause
1554 walk_tree to walk into the chain as well. */
1555 if (code
== PARM_DECL
|| code
== TREE_LIST
|| code
== OVERLOAD
1556 || statement_code_p (code
))
1557 TREE_CHAIN (*tp
) = chain
;
1559 /* For now, we don't update BLOCKs when we make copies. So, we
1560 have to nullify all scope-statements. */
1561 if (TREE_CODE (*tp
) == SCOPE_STMT
)
1562 SCOPE_STMT_BLOCK (*tp
) = NULL_TREE
;
1564 else if (code
== TEMPLATE_TEMPLATE_PARM
1565 || code
== BOUND_TEMPLATE_TEMPLATE_PARM
)
1566 /* These must be copied specially. */
1567 *tp
= copy_template_template_parm (*tp
, NULL_TREE
);
1568 else if (TREE_CODE_CLASS (code
) == 't')
1569 /* There's no need to copy types, or anything beneath them. */
1575 #ifdef GATHER_STATISTICS
1576 extern int depth_reached
;
1580 print_lang_statistics ()
1582 print_search_statistics ();
1583 print_class_statistics ();
1584 #ifdef GATHER_STATISTICS
1585 fprintf (stderr
, "maximum template instantiation depth reached: %d\n",
1590 /* Return, as an INTEGER_CST node, the number of elements for TYPE
1591 (which is an ARRAY_TYPE). This counts only elements of the top
1595 array_type_nelts_top (type
)
1598 return fold (build (PLUS_EXPR
, sizetype
,
1599 array_type_nelts (type
),
1603 /* Return, as an INTEGER_CST node, the number of elements for TYPE
1604 (which is an ARRAY_TYPE). This one is a recursive count of all
1605 ARRAY_TYPEs that are clumped together. */
1608 array_type_nelts_total (type
)
1611 tree sz
= array_type_nelts_top (type
);
1612 type
= TREE_TYPE (type
);
1613 while (TREE_CODE (type
) == ARRAY_TYPE
)
1615 tree n
= array_type_nelts_top (type
);
1616 sz
= fold (build (MULT_EXPR
, sizetype
, sz
, n
));
1617 type
= TREE_TYPE (type
);
1622 /* Called from break_out_target_exprs via mapcar. */
1625 bot_manip (tp
, walk_subtrees
, data
)
1630 splay_tree target_remap
= ((splay_tree
) data
);
1633 if (TREE_CONSTANT (t
))
1635 /* There can't be any TARGET_EXPRs or their slot variables below
1636 this point. We used to check !TREE_SIDE_EFFECTS, but then we
1637 failed to copy an ADDR_EXPR of the slot VAR_DECL. */
1641 if (TREE_CODE (t
) == TARGET_EXPR
)
1645 if (TREE_CODE (TREE_OPERAND (t
, 1)) == AGGR_INIT_EXPR
)
1647 mark_used (TREE_OPERAND (TREE_OPERAND (TREE_OPERAND (t
, 1), 0), 0));
1649 (TREE_TYPE (t
), break_out_target_exprs (TREE_OPERAND (t
, 1)));
1653 u
= build_target_expr_with_type
1654 (break_out_target_exprs (TREE_OPERAND (t
, 1)), TREE_TYPE (t
));
1657 /* Map the old variable to the new one. */
1658 splay_tree_insert (target_remap
,
1659 (splay_tree_key
) TREE_OPERAND (t
, 0),
1660 (splay_tree_value
) TREE_OPERAND (u
, 0));
1662 /* Replace the old expression with the new version. */
1664 /* We don't have to go below this point; the recursive call to
1665 break_out_target_exprs will have handled anything below this
1670 else if (TREE_CODE (t
) == CALL_EXPR
)
1671 mark_used (TREE_OPERAND (TREE_OPERAND (t
, 0), 0));
1673 /* Make a copy of this node. */
1674 return copy_tree_r (tp
, walk_subtrees
, NULL
);
1677 /* Replace all remapped VAR_DECLs in T with their new equivalents.
1678 DATA is really a splay-tree mapping old variables to new
1682 bot_replace (t
, walk_subtrees
, data
)
1684 int *walk_subtrees ATTRIBUTE_UNUSED
;
1687 splay_tree target_remap
= ((splay_tree
) data
);
1689 if (TREE_CODE (*t
) == VAR_DECL
)
1691 splay_tree_node n
= splay_tree_lookup (target_remap
,
1692 (splay_tree_key
) *t
);
1694 *t
= (tree
) n
->value
;
1700 /* When we parse a default argument expression, we may create
1701 temporary variables via TARGET_EXPRs. When we actually use the
1702 default-argument expression, we make a copy of the expression, but
1703 we must replace the temporaries with appropriate local versions. */
1706 break_out_target_exprs (t
)
1709 static int target_remap_count
;
1710 static splay_tree target_remap
;
1712 if (!target_remap_count
++)
1713 target_remap
= splay_tree_new (splay_tree_compare_pointers
,
1714 /*splay_tree_delete_key_fn=*/NULL
,
1715 /*splay_tree_delete_value_fn=*/NULL
);
1716 walk_tree (&t
, bot_manip
, target_remap
, NULL
);
1717 walk_tree (&t
, bot_replace
, target_remap
, NULL
);
1719 if (!--target_remap_count
)
1721 splay_tree_delete (target_remap
);
1722 target_remap
= NULL
;
1728 /* Obstack used for allocating nodes in template function and variable
1731 /* Similar to `build_nt', except that we set TREE_COMPLEXITY to be the
1732 current line number. */
1735 build_min_nt
VPARAMS ((enum tree_code code
, ...))
1737 #ifndef ANSI_PROTOTYPES
1738 enum tree_code code
;
1742 register int length
;
1747 #ifndef ANSI_PROTOTYPES
1748 code
= va_arg (p
, enum tree_code
);
1751 t
= make_node (code
);
1752 length
= TREE_CODE_LENGTH (code
);
1753 TREE_COMPLEXITY (t
) = lineno
;
1755 for (i
= 0; i
< length
; i
++)
1757 tree x
= va_arg (p
, tree
);
1758 TREE_OPERAND (t
, i
) = x
;
1765 /* Similar to `build', except we set TREE_COMPLEXITY to the current
1769 build_min
VPARAMS ((enum tree_code code
, tree tt
, ...))
1771 #ifndef ANSI_PROTOTYPES
1772 enum tree_code code
;
1777 register int length
;
1782 #ifndef ANSI_PROTOTYPES
1783 code
= va_arg (p
, enum tree_code
);
1784 tt
= va_arg (p
, tree
);
1787 t
= make_node (code
);
1788 length
= TREE_CODE_LENGTH (code
);
1790 TREE_COMPLEXITY (t
) = lineno
;
1792 for (i
= 0; i
< length
; i
++)
1794 tree x
= va_arg (p
, tree
);
1795 TREE_OPERAND (t
, i
) = x
;
1802 /* Returns an INTEGER_CST (of type `int') corresponding to I.
1803 Multiple calls with the same value of I may or may not yield the
1804 same node; therefore, callers should never modify the node
1808 build_shared_int_cst (i
)
1811 static tree cache
[256];
1814 return build_int_2 (i
, 0);
1817 cache
[i
] = build_int_2 (i
, 0);
1826 if (TREE_CODE (t
) == TYPE_DECL
)
1829 return TYPE_STUB_DECL (t
);
1830 if (t
== error_mark_node
)
1833 my_friendly_abort (42);
1835 /* Stop compiler from complaining control reaches end of non-void function. */
1839 /* Return first vector element whose BINFO_TYPE is ELEM.
1840 Return 0 if ELEM is not in VEC. VEC may be NULL_TREE. */
1843 vec_binfo_member (elem
, vec
)
1849 for (i
= 0; i
< TREE_VEC_LENGTH (vec
); ++i
)
1850 if (same_type_p (elem
, BINFO_TYPE (TREE_VEC_ELT (vec
, i
))))
1851 return TREE_VEC_ELT (vec
, i
);
1856 /* Returns the namespace that contains DECL, whether directly or
1860 decl_namespace_context (decl
)
1865 if (TREE_CODE (decl
) == NAMESPACE_DECL
)
1867 else if (TYPE_P (decl
))
1868 decl
= CP_DECL_CONTEXT (TYPE_MAIN_DECL (decl
));
1870 decl
= CP_DECL_CONTEXT (decl
);
1874 /* Return truthvalue of whether T1 is the same tree structure as T2.
1875 Return 1 if they are the same.
1876 Return 0 if they are understandably different.
1877 Return -1 if either contains tree structure not understood by
1881 cp_tree_equal (t1
, t2
)
1884 register enum tree_code code1
, code2
;
1889 if (t1
== 0 || t2
== 0)
1892 code1
= TREE_CODE (t1
);
1893 code2
= TREE_CODE (t2
);
1895 if (code1
== NOP_EXPR
|| code1
== CONVERT_EXPR
|| code1
== NON_LVALUE_EXPR
)
1897 if (code2
== NOP_EXPR
|| code2
== CONVERT_EXPR
|| code2
== NON_LVALUE_EXPR
)
1898 return cp_tree_equal (TREE_OPERAND (t1
, 0), TREE_OPERAND (t2
, 0));
1900 return cp_tree_equal (TREE_OPERAND (t1
, 0), t2
);
1902 else if (code2
== NOP_EXPR
|| code2
== CONVERT_EXPR
1903 || code2
== NON_LVALUE_EXPR
)
1904 return cp_tree_equal (t1
, TREE_OPERAND (t2
, 0));
1912 return TREE_INT_CST_LOW (t1
) == TREE_INT_CST_LOW (t2
)
1913 && TREE_INT_CST_HIGH (t1
) == TREE_INT_CST_HIGH (t2
);
1916 return REAL_VALUES_EQUAL (TREE_REAL_CST (t1
), TREE_REAL_CST (t2
));
1919 return TREE_STRING_LENGTH (t1
) == TREE_STRING_LENGTH (t2
)
1920 && !memcmp (TREE_STRING_POINTER (t1
), TREE_STRING_POINTER (t2
),
1921 TREE_STRING_LENGTH (t1
));
1924 /* We need to do this when determining whether or not two
1925 non-type pointer to member function template arguments
1927 if (!(same_type_p (TREE_TYPE (t1
), TREE_TYPE (t2
))
1928 /* The first operand is RTL. */
1929 && TREE_OPERAND (t1
, 0) == TREE_OPERAND (t2
, 0)))
1931 return cp_tree_equal (TREE_OPERAND (t1
, 1), TREE_OPERAND (t2
, 1));
1934 cmp
= cp_tree_equal (TREE_PURPOSE (t1
), TREE_PURPOSE (t2
));
1937 cmp
= cp_tree_equal (TREE_VALUE (t1
), TREE_VALUE (t2
));
1940 return cp_tree_equal (TREE_CHAIN (t1
), TREE_CHAIN (t2
));
1943 return cp_tree_equal (TREE_OPERAND (t1
, 0), TREE_OPERAND (t2
, 0));
1946 cmp
= cp_tree_equal (TREE_OPERAND (t1
, 0), TREE_OPERAND (t2
, 0));
1949 return simple_cst_list_equal (TREE_OPERAND (t1
, 1), TREE_OPERAND (t2
, 1));
1952 /* Special case: if either target is an unallocated VAR_DECL,
1953 it means that it's going to be unified with whatever the
1954 TARGET_EXPR is really supposed to initialize, so treat it
1955 as being equivalent to anything. */
1956 if ((TREE_CODE (TREE_OPERAND (t1
, 0)) == VAR_DECL
1957 && DECL_NAME (TREE_OPERAND (t1
, 0)) == NULL_TREE
1958 && DECL_RTL (TREE_OPERAND (t1
, 0)) == 0)
1959 || (TREE_CODE (TREE_OPERAND (t2
, 0)) == VAR_DECL
1960 && DECL_NAME (TREE_OPERAND (t2
, 0)) == NULL_TREE
1961 && DECL_RTL (TREE_OPERAND (t2
, 0)) == 0))
1964 cmp
= cp_tree_equal (TREE_OPERAND (t1
, 0), TREE_OPERAND (t2
, 0));
1967 return cp_tree_equal (TREE_OPERAND (t1
, 1), TREE_OPERAND (t2
, 1));
1969 case WITH_CLEANUP_EXPR
:
1970 cmp
= cp_tree_equal (TREE_OPERAND (t1
, 0), TREE_OPERAND (t2
, 0));
1973 return cp_tree_equal (TREE_OPERAND (t1
, 2), TREE_OPERAND (t1
, 2));
1976 if (TREE_OPERAND (t1
, 1) == TREE_OPERAND (t2
, 1))
1977 return cp_tree_equal (TREE_OPERAND (t1
, 0), TREE_OPERAND (t2
, 0));
1986 case TEMPLATE_PARM_INDEX
:
1987 return TEMPLATE_PARM_IDX (t1
) == TEMPLATE_PARM_IDX (t2
)
1988 && TEMPLATE_PARM_LEVEL (t1
) == TEMPLATE_PARM_LEVEL (t2
);
1992 if (TREE_CODE (TREE_OPERAND (t1
, 0)) != TREE_CODE (TREE_OPERAND (t2
, 0)))
1994 if (TYPE_P (TREE_OPERAND (t1
, 0)))
1995 return same_type_p (TREE_OPERAND (t1
, 0), TREE_OPERAND (t2
, 0));
1999 /* Two pointer-to-members are the same if they point to the same
2000 field or function in the same class. */
2001 return (PTRMEM_CST_MEMBER (t1
) == PTRMEM_CST_MEMBER (t2
)
2002 && same_type_p (PTRMEM_CST_CLASS (t1
), PTRMEM_CST_CLASS (t2
)));
2008 switch (TREE_CODE_CLASS (code1
))
2018 for (i
= 0; i
< TREE_CODE_LENGTH (code1
); ++i
)
2020 cmp
= cp_tree_equal (TREE_OPERAND (t1
, i
), TREE_OPERAND (t2
, i
));
2030 /* Build a wrapper around some pointer PTR so we can use it as a tree. */
2033 build_ptr_wrapper (ptr
)
2036 tree t
= make_node (WRAPPER
);
2037 WRAPPER_PTR (t
) = ptr
;
2041 /* Build a wrapper around some integer I so we can use it as a tree. */
2044 build_int_wrapper (i
)
2047 tree t
= make_node (WRAPPER
);
2048 WRAPPER_INT (t
) = i
;
2053 build_srcloc (file
, line
)
2059 t
= make_node (SRCLOC
);
2060 SRCLOC_FILE (t
) = file
;
2061 SRCLOC_LINE (t
) = line
;
2067 build_srcloc_here ()
2069 return build_srcloc (input_filename
, lineno
);
2072 /* The type of ARG when used as an lvalue. */
2078 tree type
= TREE_TYPE (arg
);
2079 if (TREE_CODE (arg
) == OVERLOAD
)
2080 type
= unknown_type_node
;
2084 /* The type of ARG for printing error messages; denote lvalues with
2091 tree type
= TREE_TYPE (arg
);
2092 if (TREE_CODE (type
) == ARRAY_TYPE
)
2094 else if (real_lvalue_p (arg
))
2095 type
= build_reference_type (lvalue_type (arg
));
2096 else if (IS_AGGR_TYPE (type
))
2097 type
= lvalue_type (arg
);
2102 /* Does FUNCTION use a variable-length argument list? */
2105 varargs_function_p (function
)
2108 tree parm
= TYPE_ARG_TYPES (TREE_TYPE (function
));
2109 for (; parm
; parm
= TREE_CHAIN (parm
))
2110 if (TREE_VALUE (parm
) == void_type_node
)
2115 /* Returns 1 if decl is a member of a class. */
2121 const tree ctx
= DECL_CONTEXT (decl
);
2122 return (ctx
&& TYPE_P (ctx
));
2125 /* Create a placeholder for member access where we don't actually have an
2126 object that the access is against. */
2129 build_dummy_object (type
)
2132 tree decl
= build1 (NOP_EXPR
, build_pointer_type (type
), void_zero_node
);
2133 return build_indirect_ref (decl
, NULL_PTR
);
2136 /* We've gotten a reference to a member of TYPE. Return *this if appropriate,
2137 or a dummy object otherwise. If BINFOP is non-0, it is filled with the
2138 binfo path from current_class_type to TYPE, or 0. */
2141 maybe_dummy_object (type
, binfop
)
2147 if (current_class_type
2148 && get_base_distance (type
, current_class_type
, 0, binfop
) != -1)
2149 context
= current_class_type
;
2152 /* Reference from a nested class member function. */
2155 *binfop
= TYPE_BINFO (type
);
2158 if (current_class_ref
&& context
== current_class_type
)
2159 decl
= current_class_ref
;
2161 decl
= build_dummy_object (context
);
2166 /* Returns 1 if OB is a placeholder object, or a pointer to one. */
2169 is_dummy_object (ob
)
2172 if (TREE_CODE (ob
) == INDIRECT_REF
)
2173 ob
= TREE_OPERAND (ob
, 0);
2174 return (TREE_CODE (ob
) == NOP_EXPR
2175 && TREE_OPERAND (ob
, 0) == void_zero_node
);
2178 /* Returns 1 iff type T is a POD type, as defined in [basic.types]. */
2184 t
= strip_array_types (t
);
2186 if (INTEGRAL_TYPE_P (t
))
2187 return 1; /* integral, character or enumeral type */
2188 if (FLOAT_TYPE_P (t
))
2191 return 1; /* pointer to non-member */
2192 if (TYPE_PTRMEM_P (t
))
2193 return 1; /* pointer to member object */
2194 if (TYPE_PTRMEMFUNC_P (t
))
2195 return 1; /* pointer to member function */
2197 if (! CLASS_TYPE_P (t
))
2198 return 0; /* other non-class type (reference or function) */
2199 if (CLASSTYPE_NON_POD_P (t
))
2204 /* Return a 1 if ATTR_NAME and ATTR_ARGS denote a valid C++-specific
2205 attribute for either declaration DECL or type TYPE and 0 otherwise.
2206 Plugged into valid_lang_attribute. */
2209 cp_valid_lang_attribute (attr_name
, attr_args
, decl
, type
)
2211 tree attr_args ATTRIBUTE_UNUSED
;
2212 tree decl ATTRIBUTE_UNUSED
;
2213 tree type ATTRIBUTE_UNUSED
;
2215 if (is_attribute_p ("com_interface", attr_name
))
2217 if (! flag_vtable_thunks
)
2219 error ("`com_interface' only supported with -fvtable-thunks");
2223 if (attr_args
!= NULL_TREE
2224 || decl
!= NULL_TREE
2225 || ! CLASS_TYPE_P (type
)
2226 || type
!= TYPE_MAIN_VARIANT (type
))
2228 warning ("`com_interface' attribute can only be applied to class definitions");
2233 /* The v3 ABI is already COM compliant; don't set this flag. */
2234 CLASSTYPE_COM_INTERFACE (type
) = 1;
2237 else if (is_attribute_p ("init_priority", attr_name
))
2239 tree initp_expr
= (attr_args
? TREE_VALUE (attr_args
): NULL_TREE
);
2243 STRIP_NOPS (initp_expr
);
2245 if (!initp_expr
|| TREE_CODE (initp_expr
) != INTEGER_CST
)
2247 error ("requested init_priority is not an integer constant");
2251 pri
= TREE_INT_CST_LOW (initp_expr
);
2253 type
= strip_array_types (type
);
2255 if (decl
== NULL_TREE
2256 || TREE_CODE (decl
) != VAR_DECL
2257 || ! TREE_STATIC (decl
)
2258 || DECL_EXTERNAL (decl
)
2259 || (TREE_CODE (type
) != RECORD_TYPE
2260 && TREE_CODE (type
) != UNION_TYPE
)
2261 /* Static objects in functions are initialized the
2262 first time control passes through that
2263 function. This is not precise enough to pin down an
2264 init_priority value, so don't allow it. */
2265 || current_function_decl
)
2267 error ("can only use init_priority attribute on file-scope definitions of objects of class type");
2271 if (pri
> MAX_INIT_PRIORITY
|| pri
<= 0)
2273 error ("requested init_priority is out of range");
2277 /* Check for init_priorities that are reserved for
2278 language and runtime support implementations.*/
2279 if (pri
<= MAX_RESERVED_INIT_PRIORITY
)
2282 ("requested init_priority is reserved for internal use");
2285 if (SUPPORTS_INIT_PRIORITY
)
2287 DECL_INIT_PRIORITY (decl
) = pri
;
2292 error ("init_priority attribute is not supported on this platform");
2300 /* Return a new PTRMEM_CST of the indicated TYPE. The MEMBER is the
2301 thing pointed to by the constant. */
2304 make_ptrmem_cst (type
, member
)
2308 tree ptrmem_cst
= make_node (PTRMEM_CST
);
2309 /* If would seem a great convenience if make_node would set
2310 TREE_CONSTANT for things of class `c', but it does not. */
2311 TREE_CONSTANT (ptrmem_cst
) = 1;
2312 TREE_TYPE (ptrmem_cst
) = type
;
2313 PTRMEM_CST_MEMBER (ptrmem_cst
) = member
;
2317 /* Initialize tree.c. */
2322 make_lang_type_fn
= cp_make_lang_type
;
2323 lang_unsave
= cp_unsave
;
2324 lang_statement_code_p
= cp_statement_code_p
;
2325 list_hash_table
= htab_create (31, list_hash
, list_hash_eq
, NULL
);
2326 ggc_add_root (&list_hash_table
, 1,
2327 sizeof (list_hash_table
),
2328 mark_tree_hashtable
);
2331 /* The SAVE_EXPR pointed to by TP is being copied. If ST contains
2332 information indicating to what new SAVE_EXPR this one should be
2333 mapped, use that one. Otherwise, create a new node and enter it in
2334 ST. FN is the function into which the copy will be placed. */
2337 remap_save_expr (tp
, st
, fn
, walk_subtrees
)
2345 /* See if we already encountered this SAVE_EXPR. */
2346 n
= splay_tree_lookup (st
, (splay_tree_key
) *tp
);
2348 /* If we didn't already remap this SAVE_EXPR, do so now. */
2351 tree t
= copy_node (*tp
);
2353 /* The SAVE_EXPR is now part of the function into which we
2354 are inlining this body. */
2355 SAVE_EXPR_CONTEXT (t
) = fn
;
2356 /* And we haven't evaluated it yet. */
2357 SAVE_EXPR_RTL (t
) = NULL_RTX
;
2358 /* Remember this SAVE_EXPR. */
2359 n
= splay_tree_insert (st
,
2360 (splay_tree_key
) *tp
,
2361 (splay_tree_value
) t
);
2364 /* We've already walked into this SAVE_EXPR, so we needn't do it
2368 /* Replace this SAVE_EXPR with the copy. */
2369 *tp
= (tree
) n
->value
;
2372 /* Called via walk_tree. If *TP points to a DECL_STMT for a local
2373 declaration, copies the declaration and enters it in the splay_tree
2374 pointed to by DATA (which is really a `splay_tree *'). */
2377 mark_local_for_remap_r (tp
, walk_subtrees
, data
)
2379 int *walk_subtrees ATTRIBUTE_UNUSED
;
2383 splay_tree st
= (splay_tree
) data
;
2387 if (TREE_CODE (t
) == DECL_STMT
2388 && nonstatic_local_decl_p (DECL_STMT_DECL (t
)))
2389 decl
= DECL_STMT_DECL (t
);
2390 else if (TREE_CODE (t
) == LABEL_STMT
)
2391 decl
= LABEL_STMT_LABEL (t
);
2392 else if (TREE_CODE (t
) == TARGET_EXPR
2393 && nonstatic_local_decl_p (TREE_OPERAND (t
, 0)))
2394 decl
= TREE_OPERAND (t
, 0);
2395 else if (TREE_CODE (t
) == CASE_LABEL
)
2396 decl
= CASE_LABEL_DECL (t
);
2405 copy
= copy_decl_for_inlining (decl
,
2406 DECL_CONTEXT (decl
),
2407 DECL_CONTEXT (decl
));
2409 /* Remember the copy. */
2410 splay_tree_insert (st
,
2411 (splay_tree_key
) decl
,
2412 (splay_tree_value
) copy
);
2418 /* Called via walk_tree when an expression is unsaved. Using the
2419 splay_tree pointed to by ST (which is really a `splay_tree'),
2420 remaps all local declarations to appropriate replacements. */
2423 cp_unsave_r (tp
, walk_subtrees
, data
)
2428 splay_tree st
= (splay_tree
) data
;
2431 /* Only a local declaration (variable or label). */
2432 if (nonstatic_local_decl_p (*tp
))
2434 /* Lookup the declaration. */
2435 n
= splay_tree_lookup (st
, (splay_tree_key
) *tp
);
2437 /* If it's there, remap it. */
2439 *tp
= (tree
) n
->value
;
2441 else if (TREE_CODE (*tp
) == SAVE_EXPR
)
2442 remap_save_expr (tp
, st
, current_function_decl
, walk_subtrees
);
2445 copy_tree_r (tp
, walk_subtrees
, NULL
);
2447 /* Do whatever unsaving is required. */
2448 unsave_expr_1 (*tp
);
2451 /* Keep iterating. */
2455 /* Called by unsave_expr_now whenever an expression (*TP) needs to be
2464 /* Create a splay-tree to map old local variable declarations to new
2466 st
= splay_tree_new (splay_tree_compare_pointers
, NULL
, NULL
);
2468 /* Walk the tree once figuring out what needs to be remapped. */
2469 walk_tree (tp
, mark_local_for_remap_r
, st
, NULL
);
2471 /* Walk the tree again, copying, remapping, and unsaving. */
2472 walk_tree (tp
, cp_unsave_r
, st
, NULL
);
2475 splay_tree_delete (st
);
2478 /* Returns the kind of special function that DECL (a FUNCTION_DECL)
2479 is. Note that this sfk_none is zero, so this function can be used
2480 as a predicate to test whether or not DECL is a special function. */
2482 special_function_kind
2483 special_function_p (decl
)
2486 /* Rather than doing all this stuff with magic names, we should
2487 probably have a field of type `special_function_kind' in
2488 DECL_LANG_SPECIFIC. */
2489 if (DECL_COPY_CONSTRUCTOR_P (decl
))
2490 return sfk_copy_constructor
;
2491 if (DECL_CONSTRUCTOR_P (decl
))
2492 return sfk_constructor
;
2493 if (DECL_OVERLOADED_OPERATOR_P (decl
) == NOP_EXPR
)
2494 return sfk_assignment_operator
;
2495 if (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P (decl
))
2496 return sfk_destructor
;
2497 if (DECL_COMPLETE_DESTRUCTOR_P (decl
))
2498 return sfk_complete_destructor
;
2499 if (DECL_BASE_DESTRUCTOR_P (decl
))
2500 return sfk_base_destructor
;
2501 if (DECL_DELETING_DESTRUCTOR_P (decl
))
2502 return sfk_deleting_destructor
;
2503 if (DECL_CONV_FN_P (decl
))
2504 return sfk_conversion
;
2509 /* Returns non-zero if TYPE is a character type, including wchar_t. */
2515 return (same_type_p (type
, char_type_node
)
2516 || same_type_p (type
, unsigned_char_type_node
)
2517 || same_type_p (type
, signed_char_type_node
)
2518 || same_type_p (type
, wchar_type_node
));
2521 /* Returns the kind of linkage associated with the indicated DECL. Th
2522 value returned is as specified by the language standard; it is
2523 independent of implementation details regarding template
2524 instantiation, etc. For example, it is possible that a declaration
2525 to which this function assigns external linkage would not show up
2526 as a global symbol when you run `nm' on the resulting object file. */
2532 /* This function doesn't attempt to calculate the linkage from first
2533 principles as given in [basic.link]. Instead, it makes use of
2534 the fact that we have already set TREE_PUBLIC appropriately, and
2535 then handles a few special cases. Ideally, we would calculate
2536 linkage first, and then transform that into a concrete
2539 /* Things that don't have names have no linkage. */
2540 if (!DECL_NAME (decl
))
2543 /* Things that are TREE_PUBLIC have external linkage. */
2544 if (TREE_PUBLIC (decl
))
2547 /* Some things that are not TREE_PUBLIC have external linkage, too.
2548 For example, on targets that don't have weak symbols, we make all
2549 template instantiations have internal linkage (in the object
2550 file), but the symbols should still be treated as having external
2551 linkage from the point of view of the language. */
2552 if (DECL_LANG_SPECIFIC (decl
) && DECL_COMDAT (decl
))
2555 /* Things in local scope do not have linkage, if they don't have
2557 if (decl_function_context (decl
))
2560 /* Everything else has internal linkage. */