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 extern struct obstack permanent_obstack
;
413 /* Here is how primitive or already-canonicalized types' hash
414 codes are made. MUST BE CONSISTENT WITH tree.c !!! */
415 #define TYPE_HASH(TYPE) ((HOST_WIDE_INT) (TYPE) & 0777777)
417 /* Construct, lay out and return the type of methods belonging to class
418 BASETYPE and whose arguments are described by ARGTYPES and whose values
419 are described by RETTYPE. If each type exists already, reuse it. */
422 build_cplus_method_type (basetype
, rettype
, argtypes
)
423 tree basetype
, rettype
, argtypes
;
429 /* Make a node of the sort we want. */
430 t
= make_node (METHOD_TYPE
);
432 TYPE_METHOD_BASETYPE (t
) = TYPE_MAIN_VARIANT (basetype
);
433 TREE_TYPE (t
) = rettype
;
434 ptype
= build_pointer_type (basetype
);
436 /* The actual arglist for this function includes a "hidden" argument
437 which is "this". Put it into the list of argument types. */
438 argtypes
= tree_cons (NULL_TREE
, ptype
, argtypes
);
439 TYPE_ARG_TYPES (t
) = argtypes
;
440 TREE_SIDE_EFFECTS (argtypes
) = 1; /* Mark first argtype as "artificial". */
442 /* If we already have such a type, use the old one and free this one.
443 Note that it also frees up the above cons cell if found. */
444 hashcode
= TYPE_HASH (basetype
) + TYPE_HASH (rettype
) +
445 type_hash_list (argtypes
);
447 t
= type_hash_canon (hashcode
, t
);
449 if (!COMPLETE_TYPE_P (t
))
456 build_cplus_array_type_1 (elt_type
, index_type
)
462 if (elt_type
== error_mark_node
|| index_type
== error_mark_node
)
463 return error_mark_node
;
465 if (processing_template_decl
466 || uses_template_parms (elt_type
)
467 || uses_template_parms (index_type
))
469 t
= make_node (ARRAY_TYPE
);
470 TREE_TYPE (t
) = elt_type
;
471 TYPE_DOMAIN (t
) = index_type
;
474 t
= build_array_type (elt_type
, index_type
);
476 /* Push these needs up so that initialization takes place
478 TYPE_NEEDS_CONSTRUCTING (t
)
479 = TYPE_NEEDS_CONSTRUCTING (TYPE_MAIN_VARIANT (elt_type
));
480 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (t
)
481 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TYPE_MAIN_VARIANT (elt_type
));
486 build_cplus_array_type (elt_type
, index_type
)
491 int type_quals
= CP_TYPE_QUALS (elt_type
);
493 elt_type
= TYPE_MAIN_VARIANT (elt_type
);
495 t
= build_cplus_array_type_1 (elt_type
, index_type
);
497 if (type_quals
!= TYPE_UNQUALIFIED
)
498 t
= cp_build_qualified_type (t
, type_quals
);
503 /* Make a variant of TYPE, qualified with the TYPE_QUALS. Handles
504 arrays correctly. In particular, if TYPE is an array of T's, and
505 TYPE_QUALS is non-empty, returns an array of qualified T's. If
506 at attempt is made to qualify a type illegally, and COMPLAIN is
507 non-zero, an error is issued. If COMPLAIN is zero, error_mark_node
511 cp_build_qualified_type_real (type
, type_quals
, complain
)
518 if (type
== error_mark_node
)
521 if (type_quals
== TYPE_QUALS (type
))
524 /* A restrict-qualified pointer type must be a pointer (or reference)
525 to object or incomplete type. */
526 if ((type_quals
& TYPE_QUAL_RESTRICT
)
527 && TREE_CODE (type
) != TEMPLATE_TYPE_PARM
528 && (!POINTER_TYPE_P (type
)
529 || TYPE_PTRMEM_P (type
)
530 || TREE_CODE (TREE_TYPE (type
)) == FUNCTION_TYPE
))
533 cp_error ("`%T' cannot be `restrict'-qualified", type
);
535 return error_mark_node
;
537 type_quals
&= ~TYPE_QUAL_RESTRICT
;
540 if (type_quals
!= TYPE_UNQUALIFIED
541 && TREE_CODE (type
) == FUNCTION_TYPE
)
544 cp_error ("`%T' cannot be `const'-, `volatile'-, or `restrict'-qualified", type
);
546 return error_mark_node
;
547 type_quals
= TYPE_UNQUALIFIED
;
549 else if (TREE_CODE (type
) == ARRAY_TYPE
)
551 /* In C++, the qualification really applies to the array element
552 type. Obtain the appropriately qualified element type. */
555 = cp_build_qualified_type_real (TREE_TYPE (type
),
559 if (element_type
== error_mark_node
)
560 return error_mark_node
;
562 /* See if we already have an identically qualified type. */
563 for (t
= TYPE_MAIN_VARIANT (type
); t
; t
= TYPE_NEXT_VARIANT (t
))
564 if (CP_TYPE_QUALS (t
) == type_quals
)
567 /* If we didn't already have it, create it now. */
570 /* Make a new array type, just like the old one, but with the
571 appropriately qualified element type. */
572 t
= build_type_copy (type
);
573 TREE_TYPE (t
) = element_type
;
576 /* Even if we already had this variant, we update
577 TYPE_NEEDS_CONSTRUCTING and TYPE_HAS_NONTRIVIAL_DESTRUCTOR in case
578 they changed since the variant was originally created.
580 This seems hokey; if there is some way to use a previous
581 variant *without* coming through here,
582 TYPE_NEEDS_CONSTRUCTING will never be updated. */
583 TYPE_NEEDS_CONSTRUCTING (t
)
584 = TYPE_NEEDS_CONSTRUCTING (TYPE_MAIN_VARIANT (element_type
));
585 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (t
)
586 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TYPE_MAIN_VARIANT (element_type
));
589 else if (TYPE_PTRMEMFUNC_P (type
))
591 /* For a pointer-to-member type, we can't just return a
592 cv-qualified version of the RECORD_TYPE. If we do, we
593 haven't change the field that contains the actual pointer to
594 a method, and so TYPE_PTRMEMFUNC_FN_TYPE will be wrong. */
597 t
= TYPE_PTRMEMFUNC_FN_TYPE (type
);
598 t
= cp_build_qualified_type_real (t
, type_quals
, complain
);
599 return build_ptrmemfunc_type (t
);
602 /* Retrieve (or create) the appropriately qualified variant. */
603 result
= build_qualified_type (type
, type_quals
);
605 /* If this was a pointer-to-method type, and we just made a copy,
606 then we need to clear the cached associated
607 pointer-to-member-function type; it is not valid for the new
610 && TREE_CODE (type
) == POINTER_TYPE
611 && TREE_CODE (TREE_TYPE (type
)) == METHOD_TYPE
)
612 TYPE_SET_PTRMEMFUNC_TYPE (result
, NULL_TREE
);
617 /* Returns the canonical version of TYPE. In other words, if TYPE is
618 a typedef, returns the underlying type. The cv-qualification of
619 the type returned matches the type input; they will always be
623 canonical_type_variant (t
)
626 return cp_build_qualified_type (TYPE_MAIN_VARIANT (t
), CP_TYPE_QUALS (t
));
629 /* Makes new binfos for the indirect bases under BINFO, and updates
630 BINFO_OFFSET for them and their bases. */
633 unshare_base_binfos (binfo
)
636 tree binfos
= BINFO_BASETYPES (binfo
);
640 if (binfos
== NULL_TREE
)
643 /* Now unshare the structure beneath BINFO. */
644 for (j
= TREE_VEC_LENGTH (binfos
)-1;
647 tree base_binfo
= TREE_VEC_ELT (binfos
, j
);
648 new_binfo
= TREE_VEC_ELT (binfos
, j
)
649 = make_binfo (BINFO_OFFSET (base_binfo
),
651 BINFO_VTABLE (base_binfo
),
652 BINFO_VIRTUALS (base_binfo
));
653 TREE_VIA_PUBLIC (new_binfo
) = TREE_VIA_PUBLIC (base_binfo
);
654 TREE_VIA_PROTECTED (new_binfo
) = TREE_VIA_PROTECTED (base_binfo
);
655 TREE_VIA_VIRTUAL (new_binfo
) = TREE_VIA_VIRTUAL (base_binfo
);
656 BINFO_INHERITANCE_CHAIN (new_binfo
) = binfo
;
657 BINFO_PRIMARY_BASE_OF (new_binfo
) = NULL_TREE
;
658 unshare_base_binfos (new_binfo
);
663 /* Hashing of lists so that we don't make duplicates.
664 The entry point is `list_hash_canon'. */
666 /* Now here is the hash table. When recording a list, it is added
667 to the slot whose index is the hash code mod the table size.
668 Note that the hash table is used for several kinds of lists.
669 While all these live in the same table, they are completely independent,
670 and the hash code is computed differently for each of these. */
672 static htab_t list_hash_table
;
681 /* Compare ENTRY (an entry in the hash table) with DATA (a list_proxy
682 for a node we are thinking about adding). */
685 list_hash_eq (entry
, data
)
689 tree t
= (tree
) entry
;
690 struct list_proxy
*proxy
= (struct list_proxy
*) data
;
692 return (TREE_VALUE (t
) == proxy
->value
693 && TREE_PURPOSE (t
) == proxy
->purpose
694 && TREE_CHAIN (t
) == proxy
->chain
);
697 /* Compute a hash code for a list (chain of TREE_LIST nodes
698 with goodies in the TREE_PURPOSE, TREE_VALUE, and bits of the
699 TREE_COMMON slots), by adding the hash codes of the individual entries. */
702 list_hash_pieces (purpose
, value
, chain
)
707 hashval_t hashcode
= 0;
710 hashcode
+= TYPE_HASH (chain
);
713 hashcode
+= TYPE_HASH (value
);
717 hashcode
+= TYPE_HASH (purpose
);
723 /* Hash an already existing TREE_LIST. */
730 return list_hash_pieces (TREE_PURPOSE (t
),
735 /* Given list components PURPOSE, VALUE, AND CHAIN, return the canonical
736 object for an identical list if one already exists. Otherwise, build a
737 new one, and record it as the canonical object. */
740 hash_tree_cons (purpose
, value
, chain
)
741 tree purpose
, value
, chain
;
745 struct list_proxy proxy
;
747 /* Hash the list node. */
748 hashcode
= list_hash_pieces (purpose
, value
, chain
);
749 /* Create a proxy for the TREE_LIST we would like to create. We
750 don't actually create it so as to avoid creating garbage. */
751 proxy
.purpose
= purpose
;
754 /* See if it is already in the table. */
755 slot
= htab_find_slot_with_hash (list_hash_table
, &proxy
, hashcode
,
757 /* If not, create a new node. */
759 *slot
= (PTR
) tree_cons (purpose
, value
, chain
);
763 /* Constructor for hashed lists. */
766 hash_tree_chain (value
, chain
)
769 return hash_tree_cons (NULL_TREE
, value
, chain
);
772 /* Similar, but used for concatenating two lists. */
775 hash_chainon (list1
, list2
)
782 if (TREE_CHAIN (list1
) == NULL_TREE
)
783 return hash_tree_chain (TREE_VALUE (list1
), list2
);
784 return hash_tree_chain (TREE_VALUE (list1
),
785 hash_chainon (TREE_CHAIN (list1
), list2
));
788 /* Build an association between TYPE and some parameters:
790 OFFSET is the offset added to `this' to convert it to a pointer
793 BINFO is the base binfo to use, if we are deriving from one. This
794 is necessary, as we want specialized parent binfos from base
795 classes, so that the VTABLE_NAMEs of bases are for the most derived
796 type, instead of the simple type.
798 VTABLE is the virtual function table with which to initialize
799 sub-objects of type TYPE.
801 VIRTUALS are the virtual functions sitting in VTABLE. */
804 make_binfo (offset
, binfo
, vtable
, virtuals
)
806 tree vtable
, virtuals
;
808 tree new_binfo
= make_tree_vec (11);
811 if (TREE_CODE (binfo
) == TREE_VEC
)
812 type
= BINFO_TYPE (binfo
);
816 binfo
= CLASS_TYPE_P (type
) ? TYPE_BINFO (binfo
) : NULL_TREE
;
819 TREE_TYPE (new_binfo
) = TYPE_MAIN_VARIANT (type
);
820 BINFO_OFFSET (new_binfo
) = offset
;
821 BINFO_VTABLE (new_binfo
) = vtable
;
822 BINFO_VIRTUALS (new_binfo
) = virtuals
;
824 if (binfo
&& BINFO_BASETYPES (binfo
) != NULL_TREE
)
825 BINFO_BASETYPES (new_binfo
) = copy_node (BINFO_BASETYPES (binfo
));
829 /* Return the binfo value for ELEM in TYPE. */
832 binfo_value (elem
, type
)
836 if (get_base_distance (elem
, type
, 0, (tree
*)0) == -2)
837 compiler_error ("base class `%s' ambiguous in binfo_value",
838 TYPE_NAME_STRING (elem
));
840 return TYPE_BINFO (type
);
841 if (TREE_CODE (elem
) == RECORD_TYPE
&& TYPE_BINFO (elem
) == type
)
843 return get_binfo (elem
, type
, 0);
846 /* Return a TREE_LIST whose TREE_VALUE nodes along the
847 BINFO_INHERITANCE_CHAIN for BINFO, but in the opposite order. In
848 other words, while the BINFO_INHERITANCE_CHAIN goes from base
849 classes to derived classes, the reversed path goes from derived
850 classes to base classes. */
858 reversed_path
= NULL_TREE
;
861 reversed_path
= tree_cons (NULL_TREE
, binfo
, reversed_path
);
862 binfo
= BINFO_INHERITANCE_CHAIN (binfo
);
865 return reversed_path
;
875 fprintf (stderr
, "type \"%s\", offset = ",
876 TYPE_NAME_STRING (BINFO_TYPE (elem
)));
877 fprintf (stderr
, HOST_WIDE_INT_PRINT_DEC
,
878 TREE_INT_CST_LOW (BINFO_OFFSET (elem
)));
879 fprintf (stderr
, "\nvtable type:\n");
880 debug_tree (BINFO_TYPE (elem
));
881 if (BINFO_VTABLE (elem
))
882 fprintf (stderr
, "vtable decl \"%s\"\n",
883 IDENTIFIER_POINTER (DECL_NAME (get_vtbl_decl_for_binfo (elem
))));
885 fprintf (stderr
, "no vtable decl yet\n");
886 fprintf (stderr
, "virtuals:\n");
887 virtuals
= BINFO_VIRTUALS (elem
);
888 n
= first_vfun_index (BINFO_TYPE (elem
));
892 tree fndecl
= TREE_VALUE (virtuals
);
893 fprintf (stderr
, "%s [%ld =? %ld]\n",
894 IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (fndecl
)),
895 (long) n
, (long) TREE_INT_CST_LOW (DECL_VINDEX (fndecl
)));
897 virtuals
= TREE_CHAIN (virtuals
);
906 if (TREE_CODE (t
) == FUNCTION_DECL
)
908 else if (TREE_CODE (t
) == OVERLOAD
)
910 for (i
=0; t
; t
= OVL_CHAIN (t
))
915 my_friendly_abort (359);
923 /* A baselink is also considered an overloaded function. */
924 if (TREE_CODE (x
) == OFFSET_REF
)
925 x
= TREE_OPERAND (x
, 1);
928 return (TREE_CODE (x
) == FUNCTION_DECL
929 || TREE_CODE (x
) == TEMPLATE_ID_EXPR
930 || DECL_FUNCTION_TEMPLATE_P (x
)
931 || TREE_CODE (x
) == OVERLOAD
);
935 really_overloaded_fn (x
)
938 /* A baselink is also considered an overloaded function. */
939 if (TREE_CODE (x
) == OFFSET_REF
)
940 x
= TREE_OPERAND (x
, 1);
943 return (TREE_CODE (x
) == OVERLOAD
944 && (TREE_CHAIN (x
) != NULL_TREE
945 || DECL_FUNCTION_TEMPLATE_P (OVL_FUNCTION (x
))));
952 my_friendly_assert (is_overloaded_fn (from
), 9);
953 /* A baselink is also considered an overloaded function. */
954 if (BASELINK_P (from
))
955 from
= TREE_VALUE (from
);
956 return OVL_CURRENT (from
);
959 /* Returns nonzero if T is a ->* or .* expression that refers to a
966 return (TREE_CODE (t
) == OFFSET_REF
967 && TYPE_PTRMEMFUNC_P (TREE_TYPE (TREE_OPERAND (t
, 1))));
970 /* Return a new OVL node, concatenating it with the old one. */
973 ovl_cons (decl
, chain
)
977 tree result
= make_node (OVERLOAD
);
978 TREE_TYPE (result
) = unknown_type_node
;
979 OVL_FUNCTION (result
) = decl
;
980 TREE_CHAIN (result
) = chain
;
985 /* Build a new overloaded function. If this is the first one,
986 just return it; otherwise, ovl_cons the _DECLs */
989 build_overload (decl
, chain
)
993 if (! chain
&& TREE_CODE (decl
) != TEMPLATE_DECL
)
995 if (chain
&& TREE_CODE (chain
) != OVERLOAD
)
996 chain
= ovl_cons (chain
, NULL_TREE
);
997 return ovl_cons (decl
, chain
);
1000 /* True if fn is in ovl. */
1003 ovl_member (fn
, ovl
)
1007 if (ovl
== NULL_TREE
)
1009 if (TREE_CODE (ovl
) != OVERLOAD
)
1011 for (; ovl
; ovl
= OVL_CHAIN (ovl
))
1012 if (OVL_FUNCTION (ovl
) == fn
)
1018 is_aggr_type_2 (t1
, t2
)
1021 if (TREE_CODE (t1
) != TREE_CODE (t2
))
1023 return IS_AGGR_TYPE (t1
) && IS_AGGR_TYPE (t2
);
1026 /* Returns non-zero if CODE is the code for a statement. */
1029 cp_statement_code_p (code
)
1030 enum tree_code code
;
1036 case START_CATCH_STMT
:
1038 case CTOR_INITIALIZER
:
1049 #define PRINT_RING_SIZE 4
1052 lang_printable_name (decl
, v
)
1056 static tree decl_ring
[PRINT_RING_SIZE
];
1057 static char *print_ring
[PRINT_RING_SIZE
];
1058 static int ring_counter
;
1061 /* Only cache functions. */
1063 || TREE_CODE (decl
) != FUNCTION_DECL
1064 || DECL_LANG_SPECIFIC (decl
) == 0)
1065 return lang_decl_name (decl
, v
);
1067 /* See if this print name is lying around. */
1068 for (i
= 0; i
< PRINT_RING_SIZE
; i
++)
1069 if (decl_ring
[i
] == decl
)
1070 /* yes, so return it. */
1071 return print_ring
[i
];
1073 if (++ring_counter
== PRINT_RING_SIZE
)
1076 if (current_function_decl
!= NULL_TREE
)
1078 if (decl_ring
[ring_counter
] == current_function_decl
)
1080 if (ring_counter
== PRINT_RING_SIZE
)
1082 if (decl_ring
[ring_counter
] == current_function_decl
)
1083 my_friendly_abort (106);
1086 if (print_ring
[ring_counter
])
1087 free (print_ring
[ring_counter
]);
1089 print_ring
[ring_counter
] = xstrdup (lang_decl_name (decl
, v
));
1090 decl_ring
[ring_counter
] = decl
;
1091 return print_ring
[ring_counter
];
1094 /* Build the FUNCTION_TYPE or METHOD_TYPE which may throw exceptions
1095 listed in RAISES. */
1098 build_exception_variant (type
, raises
)
1102 tree v
= TYPE_MAIN_VARIANT (type
);
1103 int type_quals
= TYPE_QUALS (type
);
1105 for (; v
; v
= TYPE_NEXT_VARIANT (v
))
1106 if (TYPE_QUALS (v
) == type_quals
1107 && comp_except_specs (raises
, TYPE_RAISES_EXCEPTIONS (v
), 1))
1110 /* Need to build a new variant. */
1111 v
= build_type_copy (type
);
1112 TYPE_RAISES_EXCEPTIONS (v
) = raises
;
1116 /* Given a TEMPLATE_TEMPLATE_PARM or BOUND_TEMPLATE_TEMPLATE_PARM
1117 node T, create a new one together with its
1118 lang_specific field and its corresponding *_DECL node.
1119 If NEWARGS is not NULL_TREE, this parameter is bound with new set of
1123 copy_template_template_parm (t
, newargs
)
1127 tree decl
= TYPE_NAME (t
);
1130 if (newargs
== NULL_TREE
)
1132 t2
= make_aggr_type (TREE_CODE (t
));
1133 decl
= copy_decl (decl
);
1135 /* No need to copy these. */
1136 TEMPLATE_TYPE_PARM_INDEX (t2
) = TEMPLATE_TYPE_PARM_INDEX (t
);
1137 TEMPLATE_TEMPLATE_PARM_TEMPLATE_INFO (t2
)
1138 = TEMPLATE_TEMPLATE_PARM_TEMPLATE_INFO (t
);
1142 t2
= make_aggr_type (BOUND_TEMPLATE_TEMPLATE_PARM
);
1143 decl
= build_decl (TYPE_DECL
, DECL_NAME (decl
), NULL_TREE
);
1145 /* These nodes have to be created to reflect new TYPE_DECL and template
1147 TEMPLATE_TYPE_PARM_INDEX (t2
) = copy_node (TEMPLATE_TYPE_PARM_INDEX (t
));
1148 TEMPLATE_PARM_DECL (TEMPLATE_TYPE_PARM_INDEX (t2
)) = decl
;
1149 TEMPLATE_TEMPLATE_PARM_TEMPLATE_INFO (t2
)
1150 = tree_cons (TEMPLATE_TEMPLATE_PARM_TEMPLATE_DECL (t
),
1151 newargs
, NULL_TREE
);
1154 TREE_TYPE (decl
) = t2
;
1155 TYPE_NAME (t2
) = decl
;
1156 TYPE_STUB_DECL (t2
) = decl
;
1161 /* Apply FUNC to all the sub-trees of TP in a pre-order traversal.
1162 FUNC is called with the DATA and the address of each sub-tree. If
1163 FUNC returns a non-NULL value, the traversal is aborted, and the
1164 value returned by FUNC is returned. If HTAB is non-NULL it is used
1165 to record the nodes visited, and to avoid visiting a node more than
1169 walk_tree (tp
, func
, data
, htab
)
1175 enum tree_code code
;
1179 #define WALK_SUBTREE(NODE) \
1182 result = walk_tree (&(NODE), func, data, htab); \
1188 /* Skip empty subtrees. */
1194 /* Don't walk the same tree twice, if the user has requested that we
1196 if (htab_find (htab
, *tp
))
1198 /* If we haven't already seen this node, add it to the table. */
1199 slot
= htab_find_slot (htab
, *tp
, INSERT
);
1203 /* Call the function. */
1205 result
= (*func
) (tp
, &walk_subtrees
, data
);
1207 /* If we found something, return it. */
1211 /* Even if we didn't, FUNC may have decided that there was nothing
1212 interesting below this point in the tree. */
1216 code
= TREE_CODE (*tp
);
1218 /* Handle common cases up front. */
1219 if (IS_EXPR_CODE_CLASS (TREE_CODE_CLASS (code
))
1220 || TREE_CODE_CLASS (code
) == 'r'
1221 || TREE_CODE_CLASS (code
) == 's')
1225 /* Set lineno here so we get the right instantiation context
1226 if we call instantiate_decl from inlinable_function_p. */
1227 if (statement_code_p (code
) && !STMT_LINENO_FOR_FN_P (*tp
))
1228 lineno
= STMT_LINENO (*tp
);
1230 /* Walk over all the sub-trees of this operand. */
1231 len
= first_rtl_op (code
);
1232 /* TARGET_EXPRs are peculiar: operands 1 and 3 can be the same.
1233 But, we only want to walk once. */
1234 if (code
== TARGET_EXPR
1235 && TREE_OPERAND (*tp
, 3) == TREE_OPERAND (*tp
, 1))
1237 /* Go through the subtrees. We need to do this in forward order so
1238 that the scope of a FOR_EXPR is handled properly. */
1239 for (i
= 0; i
< len
; ++i
)
1240 WALK_SUBTREE (TREE_OPERAND (*tp
, i
));
1242 /* For statements, we also walk the chain so that we cover the
1243 entire statement tree. */
1244 if (statement_code_p (code
))
1246 if (code
== DECL_STMT
1247 && DECL_STMT_DECL (*tp
)
1248 && DECL_P (DECL_STMT_DECL (*tp
)))
1250 /* Walk the DECL_INITIAL and DECL_SIZE. We don't want to walk
1251 into declarations that are just mentioned, rather than
1252 declared; they don't really belong to this part of the tree.
1253 And, we can see cycles: the initializer for a declaration can
1254 refer to the declaration itself. */
1255 WALK_SUBTREE (DECL_INITIAL (DECL_STMT_DECL (*tp
)));
1256 WALK_SUBTREE (DECL_SIZE (DECL_STMT_DECL (*tp
)));
1257 WALK_SUBTREE (DECL_SIZE_UNIT (DECL_STMT_DECL (*tp
)));
1260 /* This can be tail-recursion optimized if we write it this way. */
1261 return walk_tree (&TREE_CHAIN (*tp
), func
, data
, htab
);
1264 /* We didn't find what we were looking for. */
1267 else if (TREE_CODE_CLASS (code
) == 'd')
1269 WALK_SUBTREE (TREE_TYPE (*tp
));
1271 /* We didn't find what we were looking for. */
1275 /* Not one of the easy cases. We must explicitly go through the
1280 case IDENTIFIER_NODE
:
1285 case TEMPLATE_TEMPLATE_PARM
:
1286 case BOUND_TEMPLATE_TEMPLATE_PARM
:
1287 case TEMPLATE_PARM_INDEX
:
1288 case TEMPLATE_TYPE_PARM
:
1299 /* None of thse have subtrees other than those already walked
1304 WALK_SUBTREE (TREE_TYPE (*tp
));
1308 case REFERENCE_TYPE
:
1309 WALK_SUBTREE (TREE_TYPE (*tp
));
1313 /* A BASELINK_P's TREE_PURPOSE is a BINFO, and hence circular. */
1314 if (!BASELINK_P (*tp
))
1315 WALK_SUBTREE (TREE_PURPOSE (*tp
));
1316 WALK_SUBTREE (TREE_VALUE (*tp
));
1317 WALK_SUBTREE (TREE_CHAIN (*tp
));
1321 WALK_SUBTREE (OVL_FUNCTION (*tp
));
1322 WALK_SUBTREE (OVL_CHAIN (*tp
));
1327 int len
= TREE_VEC_LENGTH (*tp
);
1329 WALK_SUBTREE (TREE_VEC_ELT (*tp
, len
));
1334 WALK_SUBTREE (TREE_REALPART (*tp
));
1335 WALK_SUBTREE (TREE_IMAGPART (*tp
));
1339 WALK_SUBTREE (CONSTRUCTOR_ELTS (*tp
));
1343 WALK_SUBTREE (TYPE_METHOD_BASETYPE (*tp
));
1347 WALK_SUBTREE (TREE_TYPE (*tp
));
1349 tree arg
= TYPE_ARG_TYPES (*tp
);
1351 /* We never want to walk into default arguments. */
1352 for (; arg
; arg
= TREE_CHAIN (arg
))
1353 WALK_SUBTREE (TREE_VALUE (arg
));
1358 WALK_SUBTREE (TREE_TYPE (*tp
));
1359 WALK_SUBTREE (TYPE_DOMAIN (*tp
));
1363 WALK_SUBTREE (TYPE_MIN_VALUE (*tp
));
1364 WALK_SUBTREE (TYPE_MAX_VALUE (*tp
));
1368 WALK_SUBTREE (TREE_TYPE (*tp
));
1369 WALK_SUBTREE (TYPE_OFFSET_BASETYPE (*tp
));
1373 if (TYPE_PTRMEMFUNC_P (*tp
))
1374 WALK_SUBTREE (TYPE_PTRMEMFUNC_FN_TYPE (*tp
));
1378 my_friendly_abort (19990803);
1381 /* We didn't find what we were looking for. */
1387 /* Like walk_tree, but does not walk duplicate nodes more than
1391 walk_tree_without_duplicates (tp
, func
, data
)
1399 htab
= htab_create (37, htab_hash_pointer
, htab_eq_pointer
, NULL
);
1400 result
= walk_tree (tp
, func
, data
, htab
);
1405 /* Called from count_trees via walk_tree. */
1408 count_trees_r (tp
, walk_subtrees
, data
)
1409 tree
*tp ATTRIBUTE_UNUSED
;
1410 int *walk_subtrees ATTRIBUTE_UNUSED
;
1417 /* Debugging function for measuring the rough complexity of a tree
1425 walk_tree_without_duplicates (&t
, count_trees_r
, &n_trees
);
1429 /* Called from verify_stmt_tree via walk_tree. */
1432 verify_stmt_tree_r (tp
, walk_subtrees
, data
)
1434 int *walk_subtrees ATTRIBUTE_UNUSED
;
1438 htab_t
*statements
= (htab_t
*) data
;
1441 if (!statement_code_p (TREE_CODE (t
)))
1444 /* If this statement is already present in the hash table, then
1445 there is a circularity in the statement tree. */
1446 if (htab_find (*statements
, t
))
1447 my_friendly_abort (20000727);
1449 slot
= htab_find_slot (*statements
, t
, INSERT
);
1455 /* Debugging function to check that the statement T has not been
1456 corrupted. For now, this function simply checks that T contains no
1460 verify_stmt_tree (t
)
1464 statements
= htab_create (37, htab_hash_pointer
, htab_eq_pointer
, NULL
);
1465 walk_tree (&t
, verify_stmt_tree_r
, &statements
, NULL
);
1466 htab_delete (statements
);
1469 /* Called from find_tree via walk_tree. */
1472 find_tree_r (tp
, walk_subtrees
, data
)
1474 int *walk_subtrees ATTRIBUTE_UNUSED
;
1477 if (*tp
== (tree
) data
)
1483 /* Returns X if X appears in the tree structure rooted at T. */
1490 return walk_tree_without_duplicates (&t
, find_tree_r
, x
);
1493 /* Passed to walk_tree. Checks for the use of types with no linkage. */
1496 no_linkage_helper (tp
, walk_subtrees
, data
)
1498 int *walk_subtrees ATTRIBUTE_UNUSED
;
1499 void *data ATTRIBUTE_UNUSED
;
1504 && (CLASS_TYPE_P (t
) || TREE_CODE (t
) == ENUMERAL_TYPE
)
1505 && (decl_function_context (TYPE_MAIN_DECL (t
))
1506 || ANON_AGGRNAME_P (TYPE_IDENTIFIER (t
))))
1511 /* Check if the type T depends on a type with no linkage and if so, return
1515 no_linkage_check (t
)
1518 /* There's no point in checking linkage on template functions; we
1519 can't know their complete types. */
1520 if (processing_template_decl
)
1523 t
= walk_tree_without_duplicates (&t
, no_linkage_helper
, NULL
);
1524 if (t
!= error_mark_node
)
1529 /* Passed to walk_tree. Copies the node pointed to, if appropriate. */
1532 copy_tree_r (tp
, walk_subtrees
, data
)
1535 void *data ATTRIBUTE_UNUSED
;
1537 enum tree_code code
= TREE_CODE (*tp
);
1539 /* We make copies of most nodes. */
1540 if (IS_EXPR_CODE_CLASS (TREE_CODE_CLASS (code
))
1541 || TREE_CODE_CLASS (code
) == 'r'
1542 || TREE_CODE_CLASS (code
) == 'c'
1543 || TREE_CODE_CLASS (code
) == 's'
1544 || code
== TREE_LIST
1546 || code
== OVERLOAD
)
1548 /* Because the chain gets clobbered when we make a copy, we save it
1550 tree chain
= TREE_CHAIN (*tp
);
1552 /* Copy the node. */
1553 *tp
= copy_node (*tp
);
1555 /* Now, restore the chain, if appropriate. That will cause
1556 walk_tree to walk into the chain as well. */
1557 if (code
== PARM_DECL
|| code
== TREE_LIST
|| code
== OVERLOAD
1558 || statement_code_p (code
))
1559 TREE_CHAIN (*tp
) = chain
;
1561 /* For now, we don't update BLOCKs when we make copies. So, we
1562 have to nullify all scope-statements. */
1563 if (TREE_CODE (*tp
) == SCOPE_STMT
)
1564 SCOPE_STMT_BLOCK (*tp
) = NULL_TREE
;
1566 else if (code
== TEMPLATE_TEMPLATE_PARM
1567 || code
== BOUND_TEMPLATE_TEMPLATE_PARM
)
1568 /* These must be copied specially. */
1569 *tp
= copy_template_template_parm (*tp
, NULL_TREE
);
1570 else if (TREE_CODE_CLASS (code
) == 't')
1571 /* There's no need to copy types, or anything beneath them. */
1577 #ifdef GATHER_STATISTICS
1578 extern int depth_reached
;
1582 print_lang_statistics ()
1584 print_search_statistics ();
1585 print_class_statistics ();
1586 #ifdef GATHER_STATISTICS
1587 fprintf (stderr
, "maximum template instantiation depth reached: %d\n",
1592 /* Return, as an INTEGER_CST node, the number of elements for TYPE
1593 (which is an ARRAY_TYPE). This counts only elements of the top
1597 array_type_nelts_top (type
)
1600 return fold (build (PLUS_EXPR
, sizetype
,
1601 array_type_nelts (type
),
1605 /* Return, as an INTEGER_CST node, the number of elements for TYPE
1606 (which is an ARRAY_TYPE). This one is a recursive count of all
1607 ARRAY_TYPEs that are clumped together. */
1610 array_type_nelts_total (type
)
1613 tree sz
= array_type_nelts_top (type
);
1614 type
= TREE_TYPE (type
);
1615 while (TREE_CODE (type
) == ARRAY_TYPE
)
1617 tree n
= array_type_nelts_top (type
);
1618 sz
= fold (build (MULT_EXPR
, sizetype
, sz
, n
));
1619 type
= TREE_TYPE (type
);
1624 /* Called from break_out_target_exprs via mapcar. */
1627 bot_manip (tp
, walk_subtrees
, data
)
1632 splay_tree target_remap
= ((splay_tree
) data
);
1635 if (TREE_CONSTANT (t
))
1637 /* There can't be any TARGET_EXPRs or their slot variables below
1638 this point. We used to check !TREE_SIDE_EFFECTS, but then we
1639 failed to copy an ADDR_EXPR of the slot VAR_DECL. */
1643 if (TREE_CODE (t
) == TARGET_EXPR
)
1647 if (TREE_CODE (TREE_OPERAND (t
, 1)) == AGGR_INIT_EXPR
)
1649 mark_used (TREE_OPERAND (TREE_OPERAND (TREE_OPERAND (t
, 1), 0), 0));
1651 (TREE_TYPE (t
), break_out_target_exprs (TREE_OPERAND (t
, 1)));
1655 u
= build_target_expr_with_type
1656 (break_out_target_exprs (TREE_OPERAND (t
, 1)), TREE_TYPE (t
));
1659 /* Map the old variable to the new one. */
1660 splay_tree_insert (target_remap
,
1661 (splay_tree_key
) TREE_OPERAND (t
, 0),
1662 (splay_tree_value
) TREE_OPERAND (u
, 0));
1664 /* Replace the old expression with the new version. */
1666 /* We don't have to go below this point; the recursive call to
1667 break_out_target_exprs will have handled anything below this
1672 else if (TREE_CODE (t
) == CALL_EXPR
)
1673 mark_used (TREE_OPERAND (TREE_OPERAND (t
, 0), 0));
1675 /* Make a copy of this node. */
1676 return copy_tree_r (tp
, walk_subtrees
, NULL
);
1679 /* Replace all remapped VAR_DECLs in T with their new equivalents.
1680 DATA is really a splay-tree mapping old variables to new
1684 bot_replace (t
, walk_subtrees
, data
)
1686 int *walk_subtrees ATTRIBUTE_UNUSED
;
1689 splay_tree target_remap
= ((splay_tree
) data
);
1691 if (TREE_CODE (*t
) == VAR_DECL
)
1693 splay_tree_node n
= splay_tree_lookup (target_remap
,
1694 (splay_tree_key
) *t
);
1696 *t
= (tree
) n
->value
;
1702 /* When we parse a default argument expression, we may create
1703 temporary variables via TARGET_EXPRs. When we actually use the
1704 default-argument expression, we make a copy of the expression, but
1705 we must replace the temporaries with appropriate local versions. */
1708 break_out_target_exprs (t
)
1711 static int target_remap_count
;
1712 static splay_tree target_remap
;
1714 if (!target_remap_count
++)
1715 target_remap
= splay_tree_new (splay_tree_compare_pointers
,
1716 /*splay_tree_delete_key_fn=*/NULL
,
1717 /*splay_tree_delete_value_fn=*/NULL
);
1718 walk_tree (&t
, bot_manip
, target_remap
, NULL
);
1719 walk_tree (&t
, bot_replace
, target_remap
, NULL
);
1721 if (!--target_remap_count
)
1723 splay_tree_delete (target_remap
);
1724 target_remap
= NULL
;
1730 /* Obstack used for allocating nodes in template function and variable
1733 /* Similar to `build_nt', except that we set TREE_COMPLEXITY to be the
1734 current line number. */
1737 build_min_nt
VPARAMS ((enum tree_code code
, ...))
1739 #ifndef ANSI_PROTOTYPES
1740 enum tree_code code
;
1744 register int length
;
1749 #ifndef ANSI_PROTOTYPES
1750 code
= va_arg (p
, enum tree_code
);
1753 t
= make_node (code
);
1754 length
= TREE_CODE_LENGTH (code
);
1755 TREE_COMPLEXITY (t
) = lineno
;
1757 for (i
= 0; i
< length
; i
++)
1759 tree x
= va_arg (p
, tree
);
1760 TREE_OPERAND (t
, i
) = x
;
1767 /* Similar to `build', except we set TREE_COMPLEXITY to the current
1771 build_min
VPARAMS ((enum tree_code code
, tree tt
, ...))
1773 #ifndef ANSI_PROTOTYPES
1774 enum tree_code code
;
1779 register int length
;
1784 #ifndef ANSI_PROTOTYPES
1785 code
= va_arg (p
, enum tree_code
);
1786 tt
= va_arg (p
, tree
);
1789 t
= make_node (code
);
1790 length
= TREE_CODE_LENGTH (code
);
1792 TREE_COMPLEXITY (t
) = lineno
;
1794 for (i
= 0; i
< length
; i
++)
1796 tree x
= va_arg (p
, tree
);
1797 TREE_OPERAND (t
, i
) = x
;
1804 /* Returns an INTEGER_CST (of type `int') corresponding to I.
1805 Multiple calls with the same value of I may or may not yield the
1806 same node; therefore, callers should never modify the node
1810 build_shared_int_cst (i
)
1813 static tree cache
[256];
1816 return build_int_2 (i
, 0);
1819 cache
[i
] = build_int_2 (i
, 0);
1828 if (TREE_CODE (t
) == TYPE_DECL
)
1831 return TYPE_STUB_DECL (t
);
1832 if (t
== error_mark_node
)
1835 my_friendly_abort (42);
1837 /* Stop compiler from complaining control reaches end of non-void function. */
1842 can_free (obstack
, t
)
1843 struct obstack
*obstack
;
1848 if (TREE_CODE (t
) == TREE_VEC
)
1849 size
= (TREE_VEC_LENGTH (t
)-1) * sizeof (tree
) + sizeof (struct tree_vec
);
1851 my_friendly_abort (42);
1853 #define ROUND(x) ((x + obstack_alignment_mask (obstack)) \
1854 & ~ obstack_alignment_mask (obstack))
1855 if ((char *)t
+ ROUND (size
) == obstack_next_free (obstack
))
1862 /* Return first vector element whose BINFO_TYPE is ELEM.
1863 Return 0 if ELEM is not in VEC. VEC may be NULL_TREE. */
1866 vec_binfo_member (elem
, vec
)
1872 for (i
= 0; i
< TREE_VEC_LENGTH (vec
); ++i
)
1873 if (same_type_p (elem
, BINFO_TYPE (TREE_VEC_ELT (vec
, i
))))
1874 return TREE_VEC_ELT (vec
, i
);
1879 /* Returns the namespace that contains DECL, whether directly or
1883 decl_namespace_context (decl
)
1888 if (TREE_CODE (decl
) == NAMESPACE_DECL
)
1890 else if (TYPE_P (decl
))
1891 decl
= CP_DECL_CONTEXT (TYPE_MAIN_DECL (decl
));
1893 decl
= CP_DECL_CONTEXT (decl
);
1897 /* Return truthvalue of whether T1 is the same tree structure as T2.
1898 Return 1 if they are the same.
1899 Return 0 if they are understandably different.
1900 Return -1 if either contains tree structure not understood by
1904 cp_tree_equal (t1
, t2
)
1907 register enum tree_code code1
, code2
;
1912 if (t1
== 0 || t2
== 0)
1915 code1
= TREE_CODE (t1
);
1916 code2
= TREE_CODE (t2
);
1918 if (code1
== NOP_EXPR
|| code1
== CONVERT_EXPR
|| code1
== NON_LVALUE_EXPR
)
1920 if (code2
== NOP_EXPR
|| code2
== CONVERT_EXPR
|| code2
== NON_LVALUE_EXPR
)
1921 return cp_tree_equal (TREE_OPERAND (t1
, 0), TREE_OPERAND (t2
, 0));
1923 return cp_tree_equal (TREE_OPERAND (t1
, 0), t2
);
1925 else if (code2
== NOP_EXPR
|| code2
== CONVERT_EXPR
1926 || code2
== NON_LVALUE_EXPR
)
1927 return cp_tree_equal (t1
, TREE_OPERAND (t2
, 0));
1935 return TREE_INT_CST_LOW (t1
) == TREE_INT_CST_LOW (t2
)
1936 && TREE_INT_CST_HIGH (t1
) == TREE_INT_CST_HIGH (t2
);
1939 return REAL_VALUES_EQUAL (TREE_REAL_CST (t1
), TREE_REAL_CST (t2
));
1942 return TREE_STRING_LENGTH (t1
) == TREE_STRING_LENGTH (t2
)
1943 && !memcmp (TREE_STRING_POINTER (t1
), TREE_STRING_POINTER (t2
),
1944 TREE_STRING_LENGTH (t1
));
1947 /* We need to do this when determining whether or not two
1948 non-type pointer to member function template arguments
1950 if (!(same_type_p (TREE_TYPE (t1
), TREE_TYPE (t2
))
1951 /* The first operand is RTL. */
1952 && TREE_OPERAND (t1
, 0) == TREE_OPERAND (t2
, 0)))
1954 return cp_tree_equal (TREE_OPERAND (t1
, 1), TREE_OPERAND (t2
, 1));
1957 cmp
= cp_tree_equal (TREE_PURPOSE (t1
), TREE_PURPOSE (t2
));
1960 cmp
= cp_tree_equal (TREE_VALUE (t1
), TREE_VALUE (t2
));
1963 return cp_tree_equal (TREE_CHAIN (t1
), TREE_CHAIN (t2
));
1966 return cp_tree_equal (TREE_OPERAND (t1
, 0), TREE_OPERAND (t2
, 0));
1969 cmp
= cp_tree_equal (TREE_OPERAND (t1
, 0), TREE_OPERAND (t2
, 0));
1972 return simple_cst_list_equal (TREE_OPERAND (t1
, 1), TREE_OPERAND (t2
, 1));
1975 /* Special case: if either target is an unallocated VAR_DECL,
1976 it means that it's going to be unified with whatever the
1977 TARGET_EXPR is really supposed to initialize, so treat it
1978 as being equivalent to anything. */
1979 if ((TREE_CODE (TREE_OPERAND (t1
, 0)) == VAR_DECL
1980 && DECL_NAME (TREE_OPERAND (t1
, 0)) == NULL_TREE
1981 && DECL_RTL (TREE_OPERAND (t1
, 0)) == 0)
1982 || (TREE_CODE (TREE_OPERAND (t2
, 0)) == VAR_DECL
1983 && DECL_NAME (TREE_OPERAND (t2
, 0)) == NULL_TREE
1984 && DECL_RTL (TREE_OPERAND (t2
, 0)) == 0))
1987 cmp
= cp_tree_equal (TREE_OPERAND (t1
, 0), TREE_OPERAND (t2
, 0));
1990 return cp_tree_equal (TREE_OPERAND (t1
, 1), TREE_OPERAND (t2
, 1));
1992 case WITH_CLEANUP_EXPR
:
1993 cmp
= cp_tree_equal (TREE_OPERAND (t1
, 0), TREE_OPERAND (t2
, 0));
1996 return cp_tree_equal (TREE_OPERAND (t1
, 2), TREE_OPERAND (t1
, 2));
1999 if (TREE_OPERAND (t1
, 1) == TREE_OPERAND (t2
, 1))
2000 return cp_tree_equal (TREE_OPERAND (t1
, 0), TREE_OPERAND (t2
, 0));
2009 case TEMPLATE_PARM_INDEX
:
2010 return TEMPLATE_PARM_IDX (t1
) == TEMPLATE_PARM_IDX (t2
)
2011 && TEMPLATE_PARM_LEVEL (t1
) == TEMPLATE_PARM_LEVEL (t2
);
2015 if (TREE_CODE (TREE_OPERAND (t1
, 0)) != TREE_CODE (TREE_OPERAND (t2
, 0)))
2017 if (TYPE_P (TREE_OPERAND (t1
, 0)))
2018 return same_type_p (TREE_OPERAND (t1
, 0), TREE_OPERAND (t2
, 0));
2022 /* Two pointer-to-members are the same if they point to the same
2023 field or function in the same class. */
2024 return (PTRMEM_CST_MEMBER (t1
) == PTRMEM_CST_MEMBER (t2
)
2025 && same_type_p (PTRMEM_CST_CLASS (t1
), PTRMEM_CST_CLASS (t2
)));
2031 switch (TREE_CODE_CLASS (code1
))
2041 for (i
= 0; i
< TREE_CODE_LENGTH (code1
); ++i
)
2043 cmp
= cp_tree_equal (TREE_OPERAND (t1
, i
), TREE_OPERAND (t2
, i
));
2053 /* Build a wrapper around some pointer PTR so we can use it as a tree. */
2056 build_ptr_wrapper (ptr
)
2059 tree t
= make_node (WRAPPER
);
2060 WRAPPER_PTR (t
) = ptr
;
2064 /* Same, but on the expression_obstack. */
2067 build_expr_ptr_wrapper (ptr
)
2070 return build_ptr_wrapper (ptr
);
2073 /* Build a wrapper around some integer I so we can use it as a tree. */
2076 build_int_wrapper (i
)
2079 tree t
= make_node (WRAPPER
);
2080 WRAPPER_INT (t
) = i
;
2085 build_srcloc (file
, line
)
2091 t
= make_node (SRCLOC
);
2092 SRCLOC_FILE (t
) = file
;
2093 SRCLOC_LINE (t
) = line
;
2099 build_srcloc_here ()
2101 return build_srcloc (input_filename
, lineno
);
2104 /* The type of ARG when used as an lvalue. */
2110 tree type
= TREE_TYPE (arg
);
2111 if (TREE_CODE (arg
) == OVERLOAD
)
2112 type
= unknown_type_node
;
2116 /* The type of ARG for printing error messages; denote lvalues with
2123 tree type
= TREE_TYPE (arg
);
2124 if (TREE_CODE (type
) == ARRAY_TYPE
)
2126 else if (real_lvalue_p (arg
))
2127 type
= build_reference_type (lvalue_type (arg
));
2128 else if (IS_AGGR_TYPE (type
))
2129 type
= lvalue_type (arg
);
2134 /* Does FUNCTION use a variable-length argument list? */
2137 varargs_function_p (function
)
2140 tree parm
= TYPE_ARG_TYPES (TREE_TYPE (function
));
2141 for (; parm
; parm
= TREE_CHAIN (parm
))
2142 if (TREE_VALUE (parm
) == void_type_node
)
2147 /* Returns 1 if decl is a member of a class. */
2153 const tree ctx
= DECL_CONTEXT (decl
);
2154 return (ctx
&& TYPE_P (ctx
));
2157 /* Create a placeholder for member access where we don't actually have an
2158 object that the access is against. */
2161 build_dummy_object (type
)
2164 tree decl
= build1 (NOP_EXPR
, build_pointer_type (type
), void_zero_node
);
2165 return build_indirect_ref (decl
, NULL_PTR
);
2168 /* We've gotten a reference to a member of TYPE. Return *this if appropriate,
2169 or a dummy object otherwise. If BINFOP is non-0, it is filled with the
2170 binfo path from current_class_type to TYPE, or 0. */
2173 maybe_dummy_object (type
, binfop
)
2179 if (current_class_type
2180 && get_base_distance (type
, current_class_type
, 0, binfop
) != -1)
2181 context
= current_class_type
;
2184 /* Reference from a nested class member function. */
2187 *binfop
= TYPE_BINFO (type
);
2190 if (current_class_ref
&& context
== current_class_type
)
2191 decl
= current_class_ref
;
2193 decl
= build_dummy_object (context
);
2198 /* Returns 1 if OB is a placeholder object, or a pointer to one. */
2201 is_dummy_object (ob
)
2204 if (TREE_CODE (ob
) == INDIRECT_REF
)
2205 ob
= TREE_OPERAND (ob
, 0);
2206 return (TREE_CODE (ob
) == NOP_EXPR
2207 && TREE_OPERAND (ob
, 0) == void_zero_node
);
2210 /* Returns 1 iff type T is a POD type, as defined in [basic.types]. */
2216 t
= strip_array_types (t
);
2218 if (INTEGRAL_TYPE_P (t
))
2219 return 1; /* integral, character or enumeral type */
2220 if (FLOAT_TYPE_P (t
))
2223 return 1; /* pointer to non-member */
2224 if (TYPE_PTRMEM_P (t
))
2225 return 1; /* pointer to member object */
2226 if (TYPE_PTRMEMFUNC_P (t
))
2227 return 1; /* pointer to member function */
2229 if (! CLASS_TYPE_P (t
))
2230 return 0; /* other non-class type (reference or function) */
2231 if (CLASSTYPE_NON_POD_P (t
))
2236 /* Return a 1 if ATTR_NAME and ATTR_ARGS denote a valid C++-specific
2237 attribute for either declaration DECL or type TYPE and 0 otherwise.
2238 Plugged into valid_lang_attribute. */
2241 cp_valid_lang_attribute (attr_name
, attr_args
, decl
, type
)
2243 tree attr_args ATTRIBUTE_UNUSED
;
2244 tree decl ATTRIBUTE_UNUSED
;
2245 tree type ATTRIBUTE_UNUSED
;
2247 if (is_attribute_p ("com_interface", attr_name
))
2249 if (! flag_vtable_thunks
)
2251 error ("`com_interface' only supported with -fvtable-thunks");
2255 if (attr_args
!= NULL_TREE
2256 || decl
!= NULL_TREE
2257 || ! CLASS_TYPE_P (type
)
2258 || type
!= TYPE_MAIN_VARIANT (type
))
2260 warning ("`com_interface' attribute can only be applied to class definitions");
2265 /* The v3 ABI is already COM compliant; don't set this flag. */
2266 CLASSTYPE_COM_INTERFACE (type
) = 1;
2269 else if (is_attribute_p ("init_priority", attr_name
))
2271 tree initp_expr
= (attr_args
? TREE_VALUE (attr_args
): NULL_TREE
);
2275 STRIP_NOPS (initp_expr
);
2277 if (!initp_expr
|| TREE_CODE (initp_expr
) != INTEGER_CST
)
2279 error ("requested init_priority is not an integer constant");
2283 pri
= TREE_INT_CST_LOW (initp_expr
);
2285 type
= strip_array_types (type
);
2287 if (decl
== NULL_TREE
2288 || TREE_CODE (decl
) != VAR_DECL
2289 || ! TREE_STATIC (decl
)
2290 || DECL_EXTERNAL (decl
)
2291 || (TREE_CODE (type
) != RECORD_TYPE
2292 && TREE_CODE (type
) != UNION_TYPE
)
2293 /* Static objects in functions are initialized the
2294 first time control passes through that
2295 function. This is not precise enough to pin down an
2296 init_priority value, so don't allow it. */
2297 || current_function_decl
)
2299 error ("can only use init_priority attribute on file-scope definitions of objects of class type");
2303 if (pri
> MAX_INIT_PRIORITY
|| pri
<= 0)
2305 error ("requested init_priority is out of range");
2309 /* Check for init_priorities that are reserved for
2310 language and runtime support implementations.*/
2311 if (pri
<= MAX_RESERVED_INIT_PRIORITY
)
2314 ("requested init_priority is reserved for internal use");
2317 if (SUPPORTS_INIT_PRIORITY
)
2319 DECL_INIT_PRIORITY (decl
) = pri
;
2324 error ("init_priority attribute is not supported on this platform");
2332 /* Return a new PTRMEM_CST of the indicated TYPE. The MEMBER is the
2333 thing pointed to by the constant. */
2336 make_ptrmem_cst (type
, member
)
2340 tree ptrmem_cst
= make_node (PTRMEM_CST
);
2341 /* If would seem a great convenience if make_node would set
2342 TREE_CONSTANT for things of class `c', but it does not. */
2343 TREE_CONSTANT (ptrmem_cst
) = 1;
2344 TREE_TYPE (ptrmem_cst
) = type
;
2345 PTRMEM_CST_MEMBER (ptrmem_cst
) = member
;
2349 /* Initialize tree.c. */
2354 make_lang_type_fn
= cp_make_lang_type
;
2355 lang_unsave
= cp_unsave
;
2356 lang_statement_code_p
= cp_statement_code_p
;
2357 list_hash_table
= htab_create (31, list_hash
, list_hash_eq
, NULL
);
2358 ggc_add_root (&list_hash_table
, 1,
2359 sizeof (list_hash_table
),
2360 mark_tree_hashtable
);
2363 /* The SAVE_EXPR pointed to by TP is being copied. If ST contains
2364 information indicating to what new SAVE_EXPR this one should be
2365 mapped, use that one. Otherwise, create a new node and enter it in
2366 ST. FN is the function into which the copy will be placed. */
2369 remap_save_expr (tp
, st
, fn
, walk_subtrees
)
2377 /* See if we already encountered this SAVE_EXPR. */
2378 n
= splay_tree_lookup (st
, (splay_tree_key
) *tp
);
2380 /* If we didn't already remap this SAVE_EXPR, do so now. */
2383 tree t
= copy_node (*tp
);
2385 /* The SAVE_EXPR is now part of the function into which we
2386 are inlining this body. */
2387 SAVE_EXPR_CONTEXT (t
) = fn
;
2388 /* And we haven't evaluated it yet. */
2389 SAVE_EXPR_RTL (t
) = NULL_RTX
;
2390 /* Remember this SAVE_EXPR. */
2391 n
= splay_tree_insert (st
,
2392 (splay_tree_key
) *tp
,
2393 (splay_tree_value
) t
);
2396 /* We've already walked into this SAVE_EXPR, so we needn't do it
2400 /* Replace this SAVE_EXPR with the copy. */
2401 *tp
= (tree
) n
->value
;
2404 /* Called via walk_tree. If *TP points to a DECL_STMT for a local
2405 declaration, copies the declaration and enters it in the splay_tree
2406 pointed to by DATA (which is really a `splay_tree *'). */
2409 mark_local_for_remap_r (tp
, walk_subtrees
, data
)
2411 int *walk_subtrees ATTRIBUTE_UNUSED
;
2415 splay_tree st
= (splay_tree
) data
;
2419 if (TREE_CODE (t
) == DECL_STMT
2420 && nonstatic_local_decl_p (DECL_STMT_DECL (t
)))
2421 decl
= DECL_STMT_DECL (t
);
2422 else if (TREE_CODE (t
) == LABEL_STMT
)
2423 decl
= LABEL_STMT_LABEL (t
);
2424 else if (TREE_CODE (t
) == TARGET_EXPR
2425 && nonstatic_local_decl_p (TREE_OPERAND (t
, 0)))
2426 decl
= TREE_OPERAND (t
, 0);
2427 else if (TREE_CODE (t
) == CASE_LABEL
)
2428 decl
= CASE_LABEL_DECL (t
);
2437 copy
= copy_decl_for_inlining (decl
,
2438 DECL_CONTEXT (decl
),
2439 DECL_CONTEXT (decl
));
2441 /* Remember the copy. */
2442 splay_tree_insert (st
,
2443 (splay_tree_key
) decl
,
2444 (splay_tree_value
) copy
);
2450 /* Called via walk_tree when an expression is unsaved. Using the
2451 splay_tree pointed to by ST (which is really a `splay_tree'),
2452 remaps all local declarations to appropriate replacements. */
2455 cp_unsave_r (tp
, walk_subtrees
, data
)
2460 splay_tree st
= (splay_tree
) data
;
2463 /* Only a local declaration (variable or label). */
2464 if (nonstatic_local_decl_p (*tp
))
2466 /* Lookup the declaration. */
2467 n
= splay_tree_lookup (st
, (splay_tree_key
) *tp
);
2469 /* If it's there, remap it. */
2471 *tp
= (tree
) n
->value
;
2473 else if (TREE_CODE (*tp
) == SAVE_EXPR
)
2474 remap_save_expr (tp
, st
, current_function_decl
, walk_subtrees
);
2477 copy_tree_r (tp
, walk_subtrees
, NULL
);
2479 /* Do whatever unsaving is required. */
2480 unsave_expr_1 (*tp
);
2483 /* Keep iterating. */
2487 /* Called by unsave_expr_now whenever an expression (*TP) needs to be
2496 /* Create a splay-tree to map old local variable declarations to new
2498 st
= splay_tree_new (splay_tree_compare_pointers
, NULL
, NULL
);
2500 /* Walk the tree once figuring out what needs to be remapped. */
2501 walk_tree (tp
, mark_local_for_remap_r
, st
, NULL
);
2503 /* Walk the tree again, copying, remapping, and unsaving. */
2504 walk_tree (tp
, cp_unsave_r
, st
, NULL
);
2507 splay_tree_delete (st
);
2510 /* Returns the kind of special function that DECL (a FUNCTION_DECL)
2511 is. Note that this sfk_none is zero, so this function can be used
2512 as a predicate to test whether or not DECL is a special function. */
2514 special_function_kind
2515 special_function_p (decl
)
2518 /* Rather than doing all this stuff with magic names, we should
2519 probably have a field of type `special_function_kind' in
2520 DECL_LANG_SPECIFIC. */
2521 if (DECL_COPY_CONSTRUCTOR_P (decl
))
2522 return sfk_copy_constructor
;
2523 if (DECL_CONSTRUCTOR_P (decl
))
2524 return sfk_constructor
;
2525 if (DECL_OVERLOADED_OPERATOR_P (decl
) == NOP_EXPR
)
2526 return sfk_assignment_operator
;
2527 if (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P (decl
))
2528 return sfk_destructor
;
2529 if (DECL_COMPLETE_DESTRUCTOR_P (decl
))
2530 return sfk_complete_destructor
;
2531 if (DECL_BASE_DESTRUCTOR_P (decl
))
2532 return sfk_base_destructor
;
2533 if (DECL_DELETING_DESTRUCTOR_P (decl
))
2534 return sfk_deleting_destructor
;
2535 if (DECL_CONV_FN_P (decl
))
2536 return sfk_conversion
;
2541 /* Returns non-zero if TYPE is a character type, including wchar_t. */
2547 return (same_type_p (type
, char_type_node
)
2548 || same_type_p (type
, unsigned_char_type_node
)
2549 || same_type_p (type
, signed_char_type_node
)
2550 || same_type_p (type
, wchar_type_node
));
2553 /* Returns the kind of linkage associated with the indicated DECL. Th
2554 value returned is as specified by the language standard; it is
2555 independent of implementation details regarding template
2556 instantiation, etc. For example, it is possible that a declaration
2557 to which this function assigns external linkage would not show up
2558 as a global symbol when you run `nm' on the resulting object file. */
2564 /* This function doesn't attempt to calculate the linkage from first
2565 principles as given in [basic.link]. Instead, it makes use of
2566 the fact that we have already set TREE_PUBLIC appropriately, and
2567 then handles a few special cases. Ideally, we would calculate
2568 linkage first, and then transform that into a concrete
2571 /* Things that don't have names have no linkage. */
2572 if (!DECL_NAME (decl
))
2575 /* Things that are TREE_PUBLIC have external linkage. */
2576 if (TREE_PUBLIC (decl
))
2579 /* Some things that are not TREE_PUBLIC have external linkage, too.
2580 For example, on targets that don't have weak symbols, we make all
2581 template instantiations have internal linkage (in the object
2582 file), but the symbols should still be treated as having external
2583 linkage from the point of view of the language. */
2584 if (DECL_LANG_SPECIFIC (decl
) && DECL_COMDAT (decl
))
2587 /* Things in local scope do not have linkage, if they don't have
2589 if (decl_function_context (decl
))
2592 /* Everything else has internal linkage. */