1 /* Language-dependent node constructors for parse phase of GNU compiler.
2 Copyright (C) 1987, 88, 92-98, 1999 Free Software Foundation, Inc.
3 Hacked by Michael Tiemann (tiemann@cygnus.com)
5 This file is part of GNU CC.
7 GNU CC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU CC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU CC; see the file COPYING. If not, write to
19 the Free Software Foundation, 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
31 #include "insn-config.h"
32 #include "integrate.h"
34 static tree bot_manip
PROTO((tree
*, int *, void *));
35 static tree bot_replace
PROTO((tree
*, int *, void *));
36 static tree build_cplus_array_type_1
PROTO((tree
, tree
));
37 static void list_hash_add
PROTO((int, tree
));
38 static int list_hash
PROTO((tree
, tree
, tree
));
39 static tree list_hash_lookup
PROTO((int, tree
, tree
, tree
));
40 static cp_lvalue_kind lvalue_p_1
PROTO((tree
, int));
41 static tree no_linkage_helper
PROTO((tree
*, int *, void *));
42 static tree build_srcloc
PROTO((char *, int));
43 static void mark_list_hash
PROTO ((void *));
44 static int statement_code_p
PROTO((enum tree_code
));
45 static tree mark_local_for_remap_r
PROTO((tree
*, int *, void *));
46 static tree cp_unsave_r
PROTO ((tree
*, int *, void *));
47 static void cp_unsave
PROTO((tree
*));
48 static tree build_target_expr
PROTO((tree
, tree
));
50 /* If REF is an lvalue, returns the kind of lvalue that REF is.
51 Otherwise, returns clk_none. If TREAT_CLASS_RVALUES_AS_LVALUES is
52 non-zero, rvalues of class type are considered lvalues. */
55 lvalue_p_1 (ref
, treat_class_rvalues_as_lvalues
)
57 int treat_class_rvalues_as_lvalues
;
59 cp_lvalue_kind op1_lvalue_kind
= clk_none
;
60 cp_lvalue_kind op2_lvalue_kind
= clk_none
;
62 if (TREE_CODE (TREE_TYPE (ref
)) == REFERENCE_TYPE
)
65 if (ref
== current_class_ptr
&& flag_this_is_variable
<= 0)
68 switch (TREE_CODE (ref
))
70 /* preincrements and predecrements are valid lvals, provided
71 what they refer to are valid lvals. */
72 case PREINCREMENT_EXPR
:
73 case PREDECREMENT_EXPR
:
77 case WITH_CLEANUP_EXPR
:
81 return lvalue_p_1 (TREE_OPERAND (ref
, 0),
82 treat_class_rvalues_as_lvalues
);
85 op1_lvalue_kind
= lvalue_p_1 (TREE_OPERAND (ref
, 0),
86 treat_class_rvalues_as_lvalues
);
88 /* The "field" can be a FUNCTION_DECL or an OVERLOAD in some
90 && TREE_CODE (TREE_OPERAND (ref
, 1)) == FIELD_DECL
91 && DECL_C_BIT_FIELD (TREE_OPERAND (ref
, 1)))
93 /* Clear the ordinary bit. If this object was a class
94 rvalue we want to preserve that information. */
95 op1_lvalue_kind
&= ~clk_ordinary
;
96 /* The lvalue is for a btifield. */
97 op1_lvalue_kind
|= clk_bitfield
;
99 return op1_lvalue_kind
;
105 if (TREE_READONLY (ref
) && ! TREE_STATIC (ref
)
106 && DECL_LANG_SPECIFIC (ref
)
107 && DECL_IN_AGGR_P (ref
))
113 if (TREE_CODE (TREE_TYPE (ref
)) != METHOD_TYPE
)
117 /* A currently unresolved scope ref. */
119 my_friendly_abort (103);
121 if (TREE_CODE (TREE_OPERAND (ref
, 1)) == FUNCTION_DECL
)
126 op1_lvalue_kind
= lvalue_p_1 (TREE_OPERAND (ref
, 0),
127 treat_class_rvalues_as_lvalues
);
128 op2_lvalue_kind
= lvalue_p_1 (TREE_OPERAND (ref
, 1),
129 treat_class_rvalues_as_lvalues
);
133 op1_lvalue_kind
= lvalue_p_1 (TREE_OPERAND (ref
, 1),
134 treat_class_rvalues_as_lvalues
);
135 op2_lvalue_kind
= lvalue_p_1 (TREE_OPERAND (ref
, 2),
136 treat_class_rvalues_as_lvalues
);
143 return lvalue_p_1 (TREE_OPERAND (ref
, 1),
144 treat_class_rvalues_as_lvalues
);
147 return treat_class_rvalues_as_lvalues
? clk_class
: clk_none
;
151 return ((treat_class_rvalues_as_lvalues
152 && IS_AGGR_TYPE (TREE_TYPE (ref
)))
153 ? clk_class
: clk_none
);
156 /* All functions (except non-static-member functions) are
158 return (DECL_NONSTATIC_MEMBER_FUNCTION_P (ref
)
159 ? clk_none
: clk_ordinary
);
165 /* If one operand is not an lvalue at all, then this expression is
167 if (!op1_lvalue_kind
|| !op2_lvalue_kind
)
170 /* Otherwise, it's an lvalue, and it has all the odd properties
171 contributed by either operand. */
172 op1_lvalue_kind
= op1_lvalue_kind
| op2_lvalue_kind
;
173 /* It's not an ordinary lvalue if it involves either a bit-field or
175 if ((op1_lvalue_kind
& ~clk_ordinary
) != clk_none
)
176 op1_lvalue_kind
&= ~clk_ordinary
;
177 return op1_lvalue_kind
;
180 /* If REF is an lvalue, returns the kind of lvalue that REF is.
181 Otherwise, returns clk_none. Lvalues can be assigned, unless they
182 have TREE_READONLY, or unless they are FUNCTION_DECLs. Lvalues can
183 have their address taken, unless they have DECL_REGISTER. */
189 return lvalue_p_1 (ref
, /*treat_class_rvalues_as_lvalues=*/0);
192 /* This differs from real_lvalue_p in that class rvalues are
193 considered lvalues. */
200 (lvalue_p_1 (ref
, /*treat_class_rvalues_as_lvalues=*/1) != clk_none
);
203 /* Return nonzero if REF is an lvalue valid for this language;
204 otherwise, print an error message and return zero. */
207 lvalue_or_else (ref
, string
)
211 int win
= lvalue_p (ref
);
213 error ("non-lvalue in %s", string
);
217 /* Build a TARGET_EXPR, initializing the DECL with the VALUE. */
220 build_target_expr (decl
, value
)
226 t
= build (TARGET_EXPR
, TREE_TYPE (decl
), decl
, value
,
227 maybe_build_cleanup (decl
), NULL_TREE
);
228 /* We always set TREE_SIDE_EFFECTS so that expand_expr does not
229 ignore the TARGET_EXPR. If there really turn out to be no
230 side-effects, then the optimizer should be able to get rid of
231 whatever code is generated anyhow. */
232 TREE_SIDE_EFFECTS (t
) = 1;
237 /* INIT is a CALL_EXPR which needs info about its target.
238 TYPE is the type that this initialization should appear to have.
240 Build an encapsulation of the initialization to perform
241 and return it so that it can be processed by language-independent
242 and language-specific expression expanders. */
245 build_cplus_new (type
, init
)
253 /* Make sure that we're not trying to create an instance of an
255 abstract_virtuals_error (NULL_TREE
, type
);
257 if (TREE_CODE (init
) != CALL_EXPR
&& TREE_CODE (init
) != AGGR_INIT_EXPR
)
258 return convert (type
, init
);
260 slot
= build (VAR_DECL
, type
);
261 DECL_ARTIFICIAL (slot
) = 1;
262 DECL_CONTEXT (slot
) = current_function_decl
;
263 layout_decl (slot
, 0);
265 /* We split the CALL_EXPR into its function and its arguments here.
266 Then, in expand_expr, we put them back together. The reason for
267 this is that this expression might be a default argument
268 expression. In that case, we need a new temporary every time the
269 expression is used. That's what break_out_target_exprs does; it
270 replaces every AGGR_INIT_EXPR with a copy that uses a fresh
271 temporary slot. Then, expand_expr builds up a call-expression
272 using the new slot. */
273 fn
= TREE_OPERAND (init
, 0);
274 rval
= build (AGGR_INIT_EXPR
, type
, fn
, TREE_OPERAND (init
, 1), slot
);
275 TREE_SIDE_EFFECTS (rval
) = 1;
276 AGGR_INIT_VIA_CTOR_P (rval
)
277 = (TREE_CODE (fn
) == ADDR_EXPR
278 && TREE_CODE (TREE_OPERAND (fn
, 0)) == FUNCTION_DECL
279 && DECL_CONSTRUCTOR_P (TREE_OPERAND (fn
, 0)));
280 rval
= build_target_expr (slot
, rval
);
285 /* Buidl a TARGET_EXPR using INIT to initialize a new temporary of the
289 build_target_expr_with_type (init
, type
)
296 slot
= build (VAR_DECL
, type
);
297 DECL_ARTIFICIAL (slot
) = 1;
298 DECL_CONTEXT (slot
) = current_function_decl
;
299 layout_decl (slot
, 0);
300 rval
= build_target_expr (slot
, init
);
305 /* Like build_target_expr_with_type, but use the type of INIT. */
308 get_target_expr (init
)
311 return build_target_expr_with_type (init
, TREE_TYPE (init
));
314 /* Recursively search EXP for CALL_EXPRs that need cleanups and replace
315 these CALL_EXPRs with tree nodes that will perform the cleanups. */
318 break_out_cleanups (exp
)
323 if (TREE_CODE (tmp
) == CALL_EXPR
324 && TYPE_NEEDS_DESTRUCTOR (TREE_TYPE (tmp
)))
325 return build_cplus_new (TREE_TYPE (tmp
), tmp
);
327 while (TREE_CODE (tmp
) == NOP_EXPR
328 || TREE_CODE (tmp
) == CONVERT_EXPR
329 || TREE_CODE (tmp
) == NON_LVALUE_EXPR
)
331 if (TREE_CODE (TREE_OPERAND (tmp
, 0)) == CALL_EXPR
332 && TYPE_NEEDS_DESTRUCTOR (TREE_TYPE (TREE_OPERAND (tmp
, 0))))
334 TREE_OPERAND (tmp
, 0)
335 = build_cplus_new (TREE_TYPE (TREE_OPERAND (tmp
, 0)),
336 TREE_OPERAND (tmp
, 0));
340 tmp
= TREE_OPERAND (tmp
, 0);
345 /* Recursively perform a preorder search EXP for CALL_EXPRs, making
346 copies where they are found. Returns a deep copy all nodes transitively
347 containing CALL_EXPRs. */
350 break_out_calls (exp
)
353 register tree t1
, t2
= NULL_TREE
;
354 register enum tree_code code
;
355 register int changed
= 0;
358 if (exp
== NULL_TREE
)
361 code
= TREE_CODE (exp
);
363 if (code
== CALL_EXPR
)
364 return copy_node (exp
);
366 /* Don't try and defeat a save_expr, as it should only be done once. */
367 if (code
== SAVE_EXPR
)
370 switch (TREE_CODE_CLASS (code
))
375 case 'c': /* a constant */
376 case 't': /* a type node */
377 case 'x': /* something random, like an identifier or an ERROR_MARK. */
380 case 'd': /* A decl node */
381 #if 0 /* This is bogus. jason 9/21/94 */
383 t1
= break_out_calls (DECL_INITIAL (exp
));
384 if (t1
!= DECL_INITIAL (exp
))
386 exp
= copy_node (exp
);
387 DECL_INITIAL (exp
) = t1
;
392 case 'b': /* A block node */
394 /* Don't know how to handle these correctly yet. Must do a
395 break_out_calls on all DECL_INITIAL values for local variables,
396 and also break_out_calls on all sub-blocks and sub-statements. */
401 case 'e': /* an expression */
402 case 'r': /* a reference */
403 case 's': /* an expression with side effects */
404 for (i
= tree_code_length
[(int) code
] - 1; i
>= 0; i
--)
406 t1
= break_out_calls (TREE_OPERAND (exp
, i
));
407 if (t1
!= TREE_OPERAND (exp
, i
))
409 exp
= copy_node (exp
);
410 TREE_OPERAND (exp
, i
) = t1
;
415 case '<': /* a comparison expression */
416 case '2': /* a binary arithmetic expression */
417 t2
= break_out_calls (TREE_OPERAND (exp
, 1));
418 if (t2
!= TREE_OPERAND (exp
, 1))
420 case '1': /* a unary arithmetic expression */
421 t1
= break_out_calls (TREE_OPERAND (exp
, 0));
422 if (t1
!= TREE_OPERAND (exp
, 0))
426 if (tree_code_length
[(int) code
] == 1)
427 return build1 (code
, TREE_TYPE (exp
), t1
);
429 return build (code
, TREE_TYPE (exp
), t1
, t2
);
436 extern struct obstack permanent_obstack
;
438 /* Here is how primitive or already-canonicalized types' hash
439 codes are made. MUST BE CONSISTENT WITH tree.c !!! */
440 #define TYPE_HASH(TYPE) ((HOST_WIDE_INT) (TYPE) & 0777777)
442 /* Construct, lay out and return the type of methods belonging to class
443 BASETYPE and whose arguments are described by ARGTYPES and whose values
444 are described by RETTYPE. If each type exists already, reuse it. */
447 build_cplus_method_type (basetype
, rettype
, argtypes
)
448 tree basetype
, rettype
, argtypes
;
454 /* Make a node of the sort we want. */
455 t
= make_node (METHOD_TYPE
);
457 TYPE_METHOD_BASETYPE (t
) = TYPE_MAIN_VARIANT (basetype
);
458 TREE_TYPE (t
) = rettype
;
459 ptype
= build_pointer_type (basetype
);
461 /* The actual arglist for this function includes a "hidden" argument
462 which is "this". Put it into the list of argument types. Make
463 sure that the new argument list is allocated on the same obstack
465 argtypes
= tree_cons (NULL_TREE
, ptype
, argtypes
);
466 TYPE_ARG_TYPES (t
) = argtypes
;
467 TREE_SIDE_EFFECTS (argtypes
) = 1; /* Mark first argtype as "artificial". */
469 /* If we already have such a type, use the old one and free this one.
470 Note that it also frees up the above cons cell if found. */
471 hashcode
= TYPE_HASH (basetype
) + TYPE_HASH (rettype
) +
472 type_hash_list (argtypes
);
474 t
= type_hash_canon (hashcode
, t
);
476 if (TYPE_SIZE (t
) == 0)
483 build_cplus_array_type_1 (elt_type
, index_type
)
489 if (elt_type
== error_mark_node
|| index_type
== error_mark_node
)
490 return error_mark_node
;
492 if (processing_template_decl
493 || uses_template_parms (elt_type
)
494 || uses_template_parms (index_type
))
496 t
= make_node (ARRAY_TYPE
);
497 TREE_TYPE (t
) = elt_type
;
498 TYPE_DOMAIN (t
) = index_type
;
501 t
= build_array_type (elt_type
, index_type
);
503 /* Push these needs up so that initialization takes place
505 TYPE_NEEDS_CONSTRUCTING (t
)
506 = TYPE_NEEDS_CONSTRUCTING (TYPE_MAIN_VARIANT (elt_type
));
507 TYPE_NEEDS_DESTRUCTOR (t
)
508 = TYPE_NEEDS_DESTRUCTOR (TYPE_MAIN_VARIANT (elt_type
));
513 build_cplus_array_type (elt_type
, index_type
)
518 int type_quals
= CP_TYPE_QUALS (elt_type
);
520 elt_type
= TYPE_MAIN_VARIANT (elt_type
);
522 t
= build_cplus_array_type_1 (elt_type
, index_type
);
524 if (type_quals
!= TYPE_UNQUALIFIED
)
525 t
= cp_build_qualified_type (t
, type_quals
);
530 /* Make a variant of TYPE, qualified with the TYPE_QUALS. Handles
531 arrays correctly. In particular, if TYPE is an array of T's, and
532 TYPE_QUALS is non-empty, returns an array of qualified T's. If
533 at attempt is made to qualify a type illegally, and COMPLAIN is
534 non-zero, an error is issued. If COMPLAIN is zero, error_mark_node
538 cp_build_qualified_type_real (type
, type_quals
, complain
)
545 if (type
== error_mark_node
)
548 if (type_quals
== TYPE_QUALS (type
))
551 /* A restrict-qualified pointer type must be a pointer (or reference)
552 to object or incomplete type. */
553 if ((type_quals
& TYPE_QUAL_RESTRICT
)
554 && TREE_CODE (type
) != TEMPLATE_TYPE_PARM
555 && (!POINTER_TYPE_P (type
)
556 || TYPE_PTRMEM_P (type
)
557 || TREE_CODE (TREE_TYPE (type
)) == FUNCTION_TYPE
))
560 cp_error ("`%T' cannot be `restrict'-qualified", type
);
562 return error_mark_node
;
564 type_quals
&= ~TYPE_QUAL_RESTRICT
;
567 if (type_quals
!= TYPE_UNQUALIFIED
568 && TREE_CODE (type
) == FUNCTION_TYPE
)
571 cp_error ("`%T' cannot be `const'-, `volatile'-, or `restrict'-qualified", type
);
573 return error_mark_node
;
574 type_quals
= TYPE_UNQUALIFIED
;
576 else if (TREE_CODE (type
) == ARRAY_TYPE
)
578 /* In C++, the qualification really applies to the array element
579 type. Obtain the appropriately qualified element type. */
582 = cp_build_qualified_type_real (TREE_TYPE (type
),
586 if (element_type
== error_mark_node
)
587 return error_mark_node
;
589 /* See if we already have an identically qualified type. */
590 for (t
= TYPE_MAIN_VARIANT (type
); t
; t
= TYPE_NEXT_VARIANT (t
))
591 if (CP_TYPE_QUALS (t
) == type_quals
)
594 /* If we didn't already have it, create it now. */
597 /* Make a new array type, just like the old one, but with the
598 appropriately qualified element type. */
599 t
= build_type_copy (type
);
600 TREE_TYPE (t
) = element_type
;
603 /* Even if we already had this variant, we update
604 TYPE_NEEDS_CONSTRUCTING and TYPE_NEEDS_DESTRUCTOR in case
605 they changed since the variant was originally created.
607 This seems hokey; if there is some way to use a previous
608 variant *without* coming through here,
609 TYPE_NEEDS_CONSTRUCTING will never be updated. */
610 TYPE_NEEDS_CONSTRUCTING (t
)
611 = TYPE_NEEDS_CONSTRUCTING (TYPE_MAIN_VARIANT (element_type
));
612 TYPE_NEEDS_DESTRUCTOR (t
)
613 = TYPE_NEEDS_DESTRUCTOR (TYPE_MAIN_VARIANT (element_type
));
616 else if (TYPE_PTRMEMFUNC_P (type
))
618 /* For a pointer-to-member type, we can't just return a
619 cv-qualified version of the RECORD_TYPE. If we do, we
620 haven't change the field that contains the actual pointer to
621 a method, and so TYPE_PTRMEMFUNC_FN_TYPE will be wrong. */
624 t
= TYPE_PTRMEMFUNC_FN_TYPE (type
);
625 t
= cp_build_qualified_type_real (t
, type_quals
, complain
);
626 return build_ptrmemfunc_type (t
);
629 /* Retrieve (or create) the appropriately qualified variant. */
630 result
= build_qualified_type (type
, type_quals
);
632 /* If this was a pointer-to-method type, and we just made a copy,
633 then we need to clear the cached associated
634 pointer-to-member-function type; it is not valid for the new
637 && TREE_CODE (type
) == POINTER_TYPE
638 && TREE_CODE (TREE_TYPE (type
)) == METHOD_TYPE
)
639 TYPE_SET_PTRMEMFUNC_TYPE (result
, NULL_TREE
);
644 /* Returns the canonical version of TYPE. In other words, if TYPE is
645 a typedef, returns the underlying type. The cv-qualification of
646 the type returned matches the type input; they will always be
650 canonical_type_variant (t
)
653 return cp_build_qualified_type (TYPE_MAIN_VARIANT (t
), CP_TYPE_QUALS (t
));
656 /* Makes new binfos for the indirect bases under BINFO, and updates
657 BINFO_OFFSET for them and their bases. */
660 unshare_base_binfos (binfo
)
663 tree binfos
= BINFO_BASETYPES (binfo
);
667 if (binfos
== NULL_TREE
)
670 /* Now unshare the structure beneath BINFO. */
671 for (j
= TREE_VEC_LENGTH (binfos
)-1;
674 tree base_binfo
= TREE_VEC_ELT (binfos
, j
);
675 new_binfo
= TREE_VEC_ELT (binfos
, j
)
676 = make_binfo (BINFO_OFFSET (base_binfo
),
678 BINFO_VTABLE (base_binfo
),
679 BINFO_VIRTUALS (base_binfo
));
680 TREE_VIA_PUBLIC (new_binfo
) = TREE_VIA_PUBLIC (base_binfo
);
681 TREE_VIA_PROTECTED (new_binfo
) = TREE_VIA_PROTECTED (base_binfo
);
682 TREE_VIA_VIRTUAL (new_binfo
) = TREE_VIA_VIRTUAL (base_binfo
);
683 BINFO_INHERITANCE_CHAIN (new_binfo
) = binfo
;
684 unshare_base_binfos (new_binfo
);
689 /* Hashing of lists so that we don't make duplicates.
690 The entry point is `list_hash_canon'. */
692 /* Each hash table slot is a bucket containing a chain
693 of these structures. */
697 struct list_hash
*next
; /* Next structure in the bucket. */
698 int hashcode
; /* Hash code of this list. */
699 tree list
; /* The list recorded here. */
702 /* Now here is the hash table. When recording a list, it is added
703 to the slot whose index is the hash code mod the table size.
704 Note that the hash table is used for several kinds of lists.
705 While all these live in the same table, they are completely independent,
706 and the hash code is computed differently for each of these. */
708 #define TYPE_HASH_SIZE 59
709 static struct list_hash
*list_hash_table
[TYPE_HASH_SIZE
];
711 /* Compute a hash code for a list (chain of TREE_LIST nodes
712 with goodies in the TREE_PURPOSE, TREE_VALUE, and bits of the
713 TREE_COMMON slots), by adding the hash codes of the individual entries. */
716 list_hash (purpose
, value
, chain
)
717 tree purpose
, value
, chain
;
719 register int hashcode
= 0;
722 hashcode
+= TYPE_HASH (chain
);
725 hashcode
+= TYPE_HASH (value
);
729 hashcode
+= TYPE_HASH (purpose
);
735 /* Look in the type hash table for a type isomorphic to TYPE.
736 If one is found, return it. Otherwise return 0. */
739 list_hash_lookup (hashcode
, purpose
, value
, chain
)
741 tree purpose
, value
, chain
;
743 register struct list_hash
*h
;
745 for (h
= list_hash_table
[hashcode
% TYPE_HASH_SIZE
]; h
; h
= h
->next
)
746 if (h
->hashcode
== hashcode
747 && TREE_PURPOSE (h
->list
) == purpose
748 && TREE_VALUE (h
->list
) == value
749 && TREE_CHAIN (h
->list
) == chain
)
754 /* Add an entry to the list-hash-table
755 for a list TYPE whose hash code is HASHCODE. */
758 list_hash_add (hashcode
, list
)
762 register struct list_hash
*h
;
764 h
= (struct list_hash
*) obstack_alloc (&permanent_obstack
, sizeof (struct list_hash
));
765 h
->hashcode
= hashcode
;
767 h
->next
= list_hash_table
[hashcode
% TYPE_HASH_SIZE
];
768 list_hash_table
[hashcode
% TYPE_HASH_SIZE
] = h
;
771 /* Given list components PURPOSE, VALUE, AND CHAIN, return the canonical
772 object for an identical list if one already exists. Otherwise, build a
773 new one, and record it as the canonical object. */
775 /* Set to 1 to debug without canonicalization. Never set by program. */
777 static int debug_no_list_hash
= 0;
780 hash_tree_cons (purpose
, value
, chain
)
781 tree purpose
, value
, chain
;
786 if (! debug_no_list_hash
)
788 hashcode
= list_hash (purpose
, value
, chain
);
789 t
= list_hash_lookup (hashcode
, purpose
, value
, chain
);
794 t
= tree_cons (purpose
, value
, chain
);
796 /* If this is a new list, record it for later reuse. */
797 if (! debug_no_list_hash
)
798 list_hash_add (hashcode
, t
);
803 /* Constructor for hashed lists. */
806 hash_tree_chain (value
, chain
)
809 return hash_tree_cons (NULL_TREE
, value
, chain
);
812 /* Similar, but used for concatenating two lists. */
815 hash_chainon (list1
, list2
)
822 if (TREE_CHAIN (list1
) == NULL_TREE
)
823 return hash_tree_chain (TREE_VALUE (list1
), list2
);
824 return hash_tree_chain (TREE_VALUE (list1
),
825 hash_chainon (TREE_CHAIN (list1
), list2
));
828 /* Build an association between TYPE and some parameters:
830 OFFSET is the offset added to `this' to convert it to a pointer
833 BINFO is the base binfo to use, if we are deriving from one. This
834 is necessary, as we want specialized parent binfos from base
835 classes, so that the VTABLE_NAMEs of bases are for the most derived
836 type, instead of the simple type.
838 VTABLE is the virtual function table with which to initialize
839 sub-objects of type TYPE.
841 VIRTUALS are the virtual functions sitting in VTABLE. */
844 make_binfo (offset
, binfo
, vtable
, virtuals
)
846 tree vtable
, virtuals
;
848 tree new_binfo
= make_tree_vec (7);
851 if (TREE_CODE (binfo
) == TREE_VEC
)
852 type
= BINFO_TYPE (binfo
);
856 binfo
= CLASS_TYPE_P (type
) ? TYPE_BINFO (binfo
) : NULL_TREE
;
859 TREE_TYPE (new_binfo
) = TYPE_MAIN_VARIANT (type
);
860 BINFO_OFFSET (new_binfo
) = offset
;
861 BINFO_VTABLE (new_binfo
) = vtable
;
862 BINFO_VIRTUALS (new_binfo
) = virtuals
;
864 if (binfo
&& BINFO_BASETYPES (binfo
) != NULL_TREE
)
865 BINFO_BASETYPES (new_binfo
) = copy_node (BINFO_BASETYPES (binfo
));
869 /* Return the binfo value for ELEM in TYPE. */
872 binfo_value (elem
, type
)
876 if (get_base_distance (elem
, type
, 0, (tree
*)0) == -2)
877 compiler_error ("base class `%s' ambiguous in binfo_value",
878 TYPE_NAME_STRING (elem
));
880 return TYPE_BINFO (type
);
881 if (TREE_CODE (elem
) == RECORD_TYPE
&& TYPE_BINFO (elem
) == type
)
883 return get_binfo (elem
, type
, 0);
886 /* Return a reversed copy of the BINFO-chain given by PATH. (If the
887 BINFO_INHERITANCE_CHAIN points from base classes to derived
888 classes, it will instead point from derived classes to base
889 classes.) Returns the first node in the reversed chain. */
895 register tree prev
= NULL_TREE
, cur
;
896 for (cur
= path
; cur
; cur
= BINFO_INHERITANCE_CHAIN (cur
))
898 tree r
= copy_node (cur
);
899 BINFO_INHERITANCE_CHAIN (r
) = prev
;
909 unsigned HOST_WIDE_INT n
;
912 fprintf (stderr
, "type \"%s\"; offset = %ld\n",
913 TYPE_NAME_STRING (BINFO_TYPE (elem
)),
914 (long) TREE_INT_CST_LOW (BINFO_OFFSET (elem
)));
915 fprintf (stderr
, "vtable type:\n");
916 debug_tree (BINFO_TYPE (elem
));
917 if (BINFO_VTABLE (elem
))
918 fprintf (stderr
, "vtable decl \"%s\"\n", IDENTIFIER_POINTER (DECL_NAME (BINFO_VTABLE (elem
))));
920 fprintf (stderr
, "no vtable decl yet\n");
921 fprintf (stderr
, "virtuals:\n");
922 virtuals
= skip_rtti_stuff (elem
, BINFO_TYPE (elem
), &n
);
926 tree fndecl
= TREE_VALUE (virtuals
);
927 fprintf (stderr
, "%s [%ld =? %ld]\n",
928 IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (fndecl
)),
929 (long) n
, (long) TREE_INT_CST_LOW (DECL_VINDEX (fndecl
)));
931 virtuals
= TREE_CHAIN (virtuals
);
940 if (TREE_CODE (t
) == FUNCTION_DECL
)
942 else if (TREE_CODE (t
) == OVERLOAD
)
944 for (i
=0; t
; t
= OVL_CHAIN (t
))
949 my_friendly_abort (359);
957 /* A baselink is also considered an overloaded function. */
958 if (TREE_CODE (x
) == OFFSET_REF
)
959 x
= TREE_OPERAND (x
, 1);
962 return (TREE_CODE (x
) == FUNCTION_DECL
963 || TREE_CODE (x
) == TEMPLATE_ID_EXPR
964 || DECL_FUNCTION_TEMPLATE_P (x
)
965 || TREE_CODE (x
) == OVERLOAD
);
969 really_overloaded_fn (x
)
972 /* A baselink is also considered an overloaded function. */
973 if (TREE_CODE (x
) == OFFSET_REF
)
974 x
= TREE_OPERAND (x
, 1);
977 return (TREE_CODE (x
) == OVERLOAD
978 && (TREE_CHAIN (x
) != NULL_TREE
979 || DECL_FUNCTION_TEMPLATE_P (OVL_FUNCTION (x
))));
986 my_friendly_assert (is_overloaded_fn (from
), 9);
987 /* A baselink is also considered an overloaded function. */
988 if (BASELINK_P (from
))
989 from
= TREE_VALUE (from
);
990 return OVL_CURRENT (from
);
993 /* Returns nonzero if T is a ->* or .* expression that refers to a
1000 return (TREE_CODE (t
) == OFFSET_REF
1001 && TYPE_PTRMEMFUNC_P (TREE_TYPE (TREE_OPERAND (t
, 1))));
1004 /* Return a new OVL node, concatenating it with the old one. */
1007 ovl_cons (decl
, chain
)
1011 tree result
= make_node (OVERLOAD
);
1012 TREE_TYPE (result
) = unknown_type_node
;
1013 OVL_FUNCTION (result
) = decl
;
1014 TREE_CHAIN (result
) = chain
;
1019 /* Build a new overloaded function. If this is the first one,
1020 just return it; otherwise, ovl_cons the _DECLs */
1023 build_overload (decl
, chain
)
1027 if (! chain
&& TREE_CODE (decl
) != TEMPLATE_DECL
)
1029 if (chain
&& TREE_CODE (chain
) != OVERLOAD
)
1030 chain
= ovl_cons (chain
, NULL_TREE
);
1031 return ovl_cons (decl
, chain
);
1034 /* True if fn is in ovl. */
1037 ovl_member (fn
, ovl
)
1041 if (ovl
== NULL_TREE
)
1043 if (TREE_CODE (ovl
) != OVERLOAD
)
1045 for (; ovl
; ovl
= OVL_CHAIN (ovl
))
1046 if (OVL_FUNCTION (ovl
) == fn
)
1052 is_aggr_type_2 (t1
, t2
)
1055 if (TREE_CODE (t1
) != TREE_CODE (t2
))
1057 return IS_AGGR_TYPE (t1
) && IS_AGGR_TYPE (t2
);
1060 /* Returns non-zero if CODE is the code for a statement. */
1063 statement_code_p (code
)
1064 enum tree_code code
;
1084 case START_CATCH_STMT
:
1087 case CTOR_INITIALIZER
:
1099 #define PRINT_RING_SIZE 4
1102 lang_printable_name (decl
, v
)
1106 static tree decl_ring
[PRINT_RING_SIZE
];
1107 static char *print_ring
[PRINT_RING_SIZE
];
1108 static int ring_counter
;
1111 /* Only cache functions. */
1113 || TREE_CODE (decl
) != FUNCTION_DECL
1114 || DECL_LANG_SPECIFIC (decl
) == 0)
1115 return lang_decl_name (decl
, v
);
1117 /* See if this print name is lying around. */
1118 for (i
= 0; i
< PRINT_RING_SIZE
; i
++)
1119 if (decl_ring
[i
] == decl
)
1120 /* yes, so return it. */
1121 return print_ring
[i
];
1123 if (++ring_counter
== PRINT_RING_SIZE
)
1126 if (current_function_decl
!= NULL_TREE
)
1128 if (decl_ring
[ring_counter
] == current_function_decl
)
1130 if (ring_counter
== PRINT_RING_SIZE
)
1132 if (decl_ring
[ring_counter
] == current_function_decl
)
1133 my_friendly_abort (106);
1136 if (print_ring
[ring_counter
])
1137 free (print_ring
[ring_counter
]);
1139 print_ring
[ring_counter
] = xstrdup (lang_decl_name (decl
, v
));
1140 decl_ring
[ring_counter
] = decl
;
1141 return print_ring
[ring_counter
];
1144 /* Build the FUNCTION_TYPE or METHOD_TYPE which may throw exceptions
1145 listed in RAISES. */
1148 build_exception_variant (type
, raises
)
1152 tree v
= TYPE_MAIN_VARIANT (type
);
1153 int type_quals
= TYPE_QUALS (type
);
1155 for (; v
; v
= TYPE_NEXT_VARIANT (v
))
1156 if (TYPE_QUALS (v
) == type_quals
1157 && comp_except_specs (raises
, TYPE_RAISES_EXCEPTIONS (v
), 1))
1160 /* Need to build a new variant. */
1161 v
= build_type_copy (type
);
1162 TYPE_RAISES_EXCEPTIONS (v
) = raises
;
1166 /* Given a TEMPLATE_TEMPLATE_PARM node T, create a new one together with its
1167 lang_specific field and its corresponding TEMPLATE_DECL node */
1170 copy_template_template_parm (t
)
1173 tree
template = TYPE_NAME (t
);
1176 t2
= make_aggr_type (TEMPLATE_TEMPLATE_PARM
);
1177 template = copy_node (template);
1178 copy_lang_decl (template);
1180 TREE_TYPE (template) = t2
;
1181 TYPE_NAME (t2
) = template;
1182 TYPE_STUB_DECL (t2
) = template;
1184 /* No need to copy these */
1185 TYPE_FIELDS (t2
) = TYPE_FIELDS (t
);
1186 TEMPLATE_TEMPLATE_PARM_TEMPLATE_INFO (t2
)
1187 = TEMPLATE_TEMPLATE_PARM_TEMPLATE_INFO (t
);
1191 /* Apply FUNC to all the sub-trees of TP in a pre-order traversal.
1192 FUNC is called with the DATA and the address of each sub-tree. If
1193 FUNC returns a non-NULL value, the traversal is aborted, and the
1194 value returned by FUNC is returned. */
1197 walk_tree (tp
, func
, data
)
1202 enum tree_code code
;
1206 #define WALK_SUBTREE(NODE) \
1209 result = walk_tree (&(NODE), func, data); \
1215 /* Skip empty subtrees. */
1219 /* Call the function. */
1221 result
= (*func
) (tp
, &walk_subtrees
, data
);
1223 /* If we found something, return it. */
1227 /* Even if we didn't, FUNC may have decided that there was nothing
1228 interesting below this point in the tree. */
1232 code
= TREE_CODE (*tp
);
1234 /* Handle common cases up front. */
1235 if (IS_EXPR_CODE_CLASS (TREE_CODE_CLASS (code
))
1236 || TREE_CODE_CLASS (code
) == 'r'
1237 || TREE_CODE_CLASS (code
) == 's')
1241 /* Walk over all the sub-trees of this operand. */
1242 len
= first_rtl_op (code
);
1243 /* TARGET_EXPRs are peculiar: operands 1 and 3 can be the same.
1244 But, we only want to walk once. */
1245 if (code
== TARGET_EXPR
1246 && TREE_OPERAND (*tp
, 3) == TREE_OPERAND (*tp
, 1))
1248 /* Go through the subtrees. We need to do this in forward order so
1249 that the scope of a FOR_EXPR is handled properly. */
1250 for (i
= 0; i
< len
; ++i
)
1251 WALK_SUBTREE (TREE_OPERAND (*tp
, i
));
1253 /* For statements, we also walk the chain so that we cover the
1254 entire statement tree. */
1255 if (statement_code_p (code
))
1257 if (code
== DECL_STMT
1258 && DECL_STMT_DECL (*tp
)
1259 && TREE_CODE_CLASS (TREE_CODE (DECL_STMT_DECL (*tp
))) == 'd')
1261 /* Walk the DECL_INITIAL and DECL_SIZE. We don't want to walk
1262 into declarations that are just mentioned, rather than
1263 declared; they don't really belong to this part of the tree.
1264 And, we can see cycles: the initializer for a declaration can
1265 refer to the declaration itself. */
1266 WALK_SUBTREE (DECL_INITIAL (DECL_STMT_DECL (*tp
)));
1267 WALK_SUBTREE (DECL_SIZE (DECL_STMT_DECL (*tp
)));
1270 WALK_SUBTREE (TREE_CHAIN (*tp
));
1273 /* We didn't find what we were looking for. */
1276 else if (TREE_CODE_CLASS (code
) == 'd')
1278 WALK_SUBTREE (TREE_TYPE (*tp
));
1280 /* We didn't find what we were looking for. */
1284 /* Not one of the easy cases. We must explicitly go through the
1289 case IDENTIFIER_NODE
:
1294 case TEMPLATE_TEMPLATE_PARM
:
1295 case TEMPLATE_PARM_INDEX
:
1296 case TEMPLATE_TYPE_PARM
:
1306 /* None of thse have subtrees other than those already walked
1311 WALK_SUBTREE (TREE_TYPE (*tp
));
1315 case REFERENCE_TYPE
:
1316 WALK_SUBTREE (TREE_TYPE (*tp
));
1320 WALK_SUBTREE (TREE_PURPOSE (*tp
));
1321 WALK_SUBTREE (TREE_VALUE (*tp
));
1322 WALK_SUBTREE (TREE_CHAIN (*tp
));
1326 WALK_SUBTREE (OVL_FUNCTION (*tp
));
1327 WALK_SUBTREE (OVL_CHAIN (*tp
));
1332 int len
= TREE_VEC_LENGTH (*tp
);
1334 WALK_SUBTREE (TREE_VEC_ELT (*tp
, len
));
1339 WALK_SUBTREE (TREE_REALPART (*tp
));
1340 WALK_SUBTREE (TREE_IMAGPART (*tp
));
1344 WALK_SUBTREE (CONSTRUCTOR_ELTS (*tp
));
1348 WALK_SUBTREE (TYPE_METHOD_BASETYPE (*tp
));
1352 WALK_SUBTREE (TREE_TYPE (*tp
));
1353 WALK_SUBTREE (TYPE_ARG_TYPES (*tp
));
1357 WALK_SUBTREE (TREE_TYPE (*tp
));
1358 WALK_SUBTREE (TYPE_DOMAIN (*tp
));
1362 WALK_SUBTREE (TYPE_MIN_VALUE (*tp
));
1363 WALK_SUBTREE (TYPE_MAX_VALUE (*tp
));
1367 WALK_SUBTREE (TREE_TYPE (*tp
));
1368 WALK_SUBTREE (TYPE_OFFSET_BASETYPE (*tp
));
1372 if (TYPE_PTRMEMFUNC_P (*tp
))
1373 WALK_SUBTREE (TYPE_PTRMEMFUNC_FN_TYPE (*tp
));
1377 my_friendly_abort (19990803);
1380 /* We didn't find what we were looking for. */
1386 /* Passed to walk_tree. Checks for the use of types with no linkage. */
1389 no_linkage_helper (tp
, walk_subtrees
, data
)
1391 int *walk_subtrees ATTRIBUTE_UNUSED
;
1392 void *data ATTRIBUTE_UNUSED
;
1397 && (IS_AGGR_TYPE (t
) || TREE_CODE (t
) == ENUMERAL_TYPE
)
1398 && (decl_function_context (TYPE_MAIN_DECL (t
))
1399 || ANON_AGGRNAME_P (TYPE_IDENTIFIER (t
))))
1404 /* Check if the type T depends on a type with no linkage and if so, return
1408 no_linkage_check (t
)
1411 /* There's no point in checking linkage on template functions; we
1412 can't know their complete types. */
1413 if (processing_template_decl
)
1416 t
= walk_tree (&t
, no_linkage_helper
, NULL
);
1417 if (t
!= error_mark_node
)
1422 /* Passed to walk_tree. Copies the node pointed to, if appropriate. */
1425 copy_tree_r (tp
, walk_subtrees
, data
)
1428 void *data ATTRIBUTE_UNUSED
;
1430 enum tree_code code
= TREE_CODE (*tp
);
1432 /* We make copies of most nodes. */
1433 if (IS_EXPR_CODE_CLASS (TREE_CODE_CLASS (code
))
1434 || TREE_CODE_CLASS (code
) == 'r'
1435 || TREE_CODE_CLASS (code
) == 'c'
1436 || TREE_CODE_CLASS (code
) == 's'
1437 || code
== PARM_DECL
1438 || code
== TREE_LIST
1440 || code
== OVERLOAD
)
1442 /* Because the chain gets clobbered when we make a copy, we save it
1444 tree chain
= TREE_CHAIN (*tp
);
1446 /* Copy the node. */
1447 *tp
= copy_node (*tp
);
1449 /* Now, restore the chain, if appropriate. That will cause
1450 walk_tree to walk into the chain as well. */
1451 if (code
== PARM_DECL
|| code
== TREE_LIST
|| code
== OVERLOAD
1452 || statement_code_p (code
))
1453 TREE_CHAIN (*tp
) = chain
;
1455 /* For now, we don't update BLOCKs when we make copies. So, we
1456 have to nullify all scope-statements. */
1457 if (TREE_CODE (*tp
) == SCOPE_STMT
)
1458 SCOPE_STMT_BLOCK (*tp
) = NULL_TREE
;
1460 else if (code
== TEMPLATE_TEMPLATE_PARM
)
1461 /* These must be copied specially. */
1462 *tp
= copy_template_template_parm (*tp
);
1463 else if (TREE_CODE_CLASS (code
) == 't')
1464 /* There's no need to copy types, or anything beneath them. */
1470 #ifdef GATHER_STATISTICS
1471 extern int depth_reached
;
1475 print_lang_statistics ()
1477 print_search_statistics ();
1478 print_class_statistics ();
1479 #ifdef GATHER_STATISTICS
1480 fprintf (stderr
, "maximum template instantiation depth reached: %d\n",
1485 /* This is used by the `assert' macro. It is provided in libgcc.a,
1486 which `cc' doesn't know how to link. Note that the C++ front-end
1487 no longer actually uses the `assert' macro (instead, it calls
1488 my_friendly_assert). But all of the back-end files still need this. */
1491 __eprintf (string
, expression
, line
, filename
)
1493 const char *expression
;
1495 const char *filename
;
1497 fprintf (stderr
, string
, expression
, line
, filename
);
1502 /* Return, as an INTEGER_CST node, the number of elements for TYPE
1503 (which is an ARRAY_TYPE). This counts only elements of the top
1507 array_type_nelts_top (type
)
1510 return fold (build (PLUS_EXPR
, sizetype
,
1511 array_type_nelts (type
),
1515 /* Return, as an INTEGER_CST node, the number of elements for TYPE
1516 (which is an ARRAY_TYPE). This one is a recursive count of all
1517 ARRAY_TYPEs that are clumped together. */
1520 array_type_nelts_total (type
)
1523 tree sz
= array_type_nelts_top (type
);
1524 type
= TREE_TYPE (type
);
1525 while (TREE_CODE (type
) == ARRAY_TYPE
)
1527 tree n
= array_type_nelts_top (type
);
1528 sz
= fold (build (MULT_EXPR
, sizetype
, sz
, n
));
1529 type
= TREE_TYPE (type
);
1534 /* Called from break_out_target_exprs via mapcar. */
1537 bot_manip (tp
, walk_subtrees
, data
)
1542 splay_tree target_remap
= ((splay_tree
) data
);
1545 if (TREE_CODE (t
) != TREE_LIST
&& ! TREE_SIDE_EFFECTS (t
))
1547 /* There can't be any TARGET_EXPRs below this point. */
1551 else if (TREE_CODE (t
) == TARGET_EXPR
)
1555 if (TREE_CODE (TREE_OPERAND (t
, 1)) == AGGR_INIT_EXPR
)
1557 mark_used (TREE_OPERAND (TREE_OPERAND (TREE_OPERAND (t
, 1), 0), 0));
1559 (TREE_TYPE (t
), break_out_target_exprs (TREE_OPERAND (t
, 1)));
1564 TREE_OPERAND (u
, 0) = build (VAR_DECL
, TREE_TYPE (t
));
1565 layout_decl (TREE_OPERAND (u
, 0), 0);
1568 /* Map the old variable to the new one. */
1569 splay_tree_insert (target_remap
,
1570 (splay_tree_key
) TREE_OPERAND (t
, 0),
1571 (splay_tree_value
) TREE_OPERAND (u
, 0));
1573 /* Replace the old expression with the new version. */
1575 /* We don't have to go below this point; the recursive call to
1576 break_out_target_exprs will have handled anything below this
1581 else if (TREE_CODE (t
) == CALL_EXPR
)
1582 mark_used (TREE_OPERAND (TREE_OPERAND (t
, 0), 0));
1584 /* Make a copy of this node. */
1585 return copy_tree_r (tp
, walk_subtrees
, NULL
);
1588 /* Replace all remapped VAR_DECLs in T with their new equivalents.
1589 DATA is really a splay-tree mapping old variables to new
1593 bot_replace (t
, walk_subtrees
, data
)
1595 int *walk_subtrees ATTRIBUTE_UNUSED
;
1598 splay_tree target_remap
= ((splay_tree
) data
);
1600 if (TREE_CODE (*t
) == VAR_DECL
)
1602 splay_tree_node n
= splay_tree_lookup (target_remap
,
1603 (splay_tree_key
) *t
);
1605 *t
= (tree
) n
->value
;
1611 /* When we parse a default argument expression, we may create
1612 temporary variables via TARGET_EXPRs. When we actually use the
1613 default-argument expression, we make a copy of the expression, but
1614 we must replace the temporaries with appropriate local versions. */
1617 break_out_target_exprs (t
)
1620 static int target_remap_count
;
1621 static splay_tree target_remap
;
1623 if (!target_remap_count
++)
1624 target_remap
= splay_tree_new (splay_tree_compare_pointers
,
1625 /*splay_tree_delete_key_fn=*/NULL
,
1626 /*splay_tree_delete_value_fn=*/NULL
);
1627 walk_tree (&t
, bot_manip
, target_remap
);
1628 walk_tree (&t
, bot_replace
, target_remap
);
1630 if (!--target_remap_count
)
1632 splay_tree_delete (target_remap
);
1633 target_remap
= NULL
;
1639 /* Obstack used for allocating nodes in template function and variable
1642 /* Similar to `build_nt', except that we set TREE_COMPLEXITY to be the
1643 current line number. */
1646 build_min_nt
VPROTO((enum tree_code code
, ...))
1648 #ifndef ANSI_PROTOTYPES
1649 enum tree_code code
;
1653 register int length
;
1658 #ifndef ANSI_PROTOTYPES
1659 code
= va_arg (p
, enum tree_code
);
1662 t
= make_node (code
);
1663 length
= tree_code_length
[(int) code
];
1664 TREE_COMPLEXITY (t
) = lineno
;
1666 for (i
= 0; i
< length
; i
++)
1668 tree x
= va_arg (p
, tree
);
1669 TREE_OPERAND (t
, i
) = x
;
1676 /* Similar to `build', except we set TREE_COMPLEXITY to the current
1680 build_min
VPROTO((enum tree_code code
, tree tt
, ...))
1682 #ifndef ANSI_PROTOTYPES
1683 enum tree_code code
;
1688 register int length
;
1693 #ifndef ANSI_PROTOTYPES
1694 code
= va_arg (p
, enum tree_code
);
1695 tt
= va_arg (p
, tree
);
1698 t
= make_node (code
);
1699 length
= tree_code_length
[(int) code
];
1701 TREE_COMPLEXITY (t
) = lineno
;
1703 for (i
= 0; i
< length
; i
++)
1705 tree x
= va_arg (p
, tree
);
1706 TREE_OPERAND (t
, i
) = x
;
1717 if (TREE_CODE (t
) == TYPE_DECL
)
1719 if (TREE_CODE_CLASS (TREE_CODE (t
)) == 't')
1720 return TYPE_STUB_DECL (t
);
1722 my_friendly_abort (42);
1724 /* Stop compiler from complaining control reaches end of non-void function. */
1729 can_free (obstack
, t
)
1730 struct obstack
*obstack
;
1735 if (TREE_CODE (t
) == TREE_VEC
)
1736 size
= (TREE_VEC_LENGTH (t
)-1) * sizeof (tree
) + sizeof (struct tree_vec
);
1738 my_friendly_abort (42);
1740 #define ROUND(x) ((x + obstack_alignment_mask (obstack)) \
1741 & ~ obstack_alignment_mask (obstack))
1742 if ((char *)t
+ ROUND (size
) == obstack_next_free (obstack
))
1749 /* Return first vector element whose BINFO_TYPE is ELEM.
1750 Return 0 if ELEM is not in VEC. VEC may be NULL_TREE. */
1753 vec_binfo_member (elem
, vec
)
1759 for (i
= 0; i
< TREE_VEC_LENGTH (vec
); ++i
)
1760 if (same_type_p (elem
, BINFO_TYPE (TREE_VEC_ELT (vec
, i
))))
1761 return TREE_VEC_ELT (vec
, i
);
1766 /* Kludge around the fact that DECL_CONTEXT for virtual functions returns
1767 the wrong thing for decl_function_context. Hopefully the uses in the
1768 backend won't matter, since we don't need a static chain for local class
1772 hack_decl_function_context (decl
)
1775 if (TREE_CODE (decl
) == FUNCTION_DECL
&& DECL_FUNCTION_MEMBER_P (decl
))
1776 return decl_function_context (TYPE_MAIN_DECL (DECL_CLASS_CONTEXT (decl
)));
1777 return decl_function_context (decl
);
1780 /* Returns the namespace that contains DECL, whether directly or
1784 decl_namespace_context (decl
)
1789 if (TREE_CODE (decl
) == NAMESPACE_DECL
)
1791 else if (TYPE_P (decl
))
1792 decl
= CP_DECL_CONTEXT (TYPE_MAIN_DECL (decl
));
1794 decl
= CP_DECL_CONTEXT (decl
);
1798 /* Return truthvalue of whether T1 is the same tree structure as T2.
1799 Return 1 if they are the same.
1800 Return 0 if they are understandably different.
1801 Return -1 if either contains tree structure not understood by
1805 cp_tree_equal (t1
, t2
)
1808 register enum tree_code code1
, code2
;
1813 if (t1
== 0 || t2
== 0)
1816 code1
= TREE_CODE (t1
);
1817 code2
= TREE_CODE (t2
);
1819 if (code1
== NOP_EXPR
|| code1
== CONVERT_EXPR
|| code1
== NON_LVALUE_EXPR
)
1821 if (code2
== NOP_EXPR
|| code2
== CONVERT_EXPR
|| code2
== NON_LVALUE_EXPR
)
1822 return cp_tree_equal (TREE_OPERAND (t1
, 0), TREE_OPERAND (t2
, 0));
1824 return cp_tree_equal (TREE_OPERAND (t1
, 0), t2
);
1826 else if (code2
== NOP_EXPR
|| code2
== CONVERT_EXPR
1827 || code2
== NON_LVALUE_EXPR
)
1828 return cp_tree_equal (t1
, TREE_OPERAND (t2
, 0));
1836 return TREE_INT_CST_LOW (t1
) == TREE_INT_CST_LOW (t2
)
1837 && TREE_INT_CST_HIGH (t1
) == TREE_INT_CST_HIGH (t2
);
1840 return REAL_VALUES_EQUAL (TREE_REAL_CST (t1
), TREE_REAL_CST (t2
));
1843 return TREE_STRING_LENGTH (t1
) == TREE_STRING_LENGTH (t2
)
1844 && !bcmp (TREE_STRING_POINTER (t1
), TREE_STRING_POINTER (t2
),
1845 TREE_STRING_LENGTH (t1
));
1848 /* We need to do this when determining whether or not two
1849 non-type pointer to member function template arguments
1851 if (!(same_type_p (TREE_TYPE (t1
), TREE_TYPE (t2
))
1852 /* The first operand is RTL. */
1853 && TREE_OPERAND (t1
, 0) == TREE_OPERAND (t2
, 0)))
1855 return cp_tree_equal (TREE_OPERAND (t1
, 1), TREE_OPERAND (t2
, 1));
1858 cmp
= cp_tree_equal (TREE_PURPOSE (t1
), TREE_PURPOSE (t2
));
1861 cmp
= cp_tree_equal (TREE_VALUE (t1
), TREE_VALUE (t2
));
1864 return cp_tree_equal (TREE_CHAIN (t1
), TREE_CHAIN (t2
));
1867 return cp_tree_equal (TREE_OPERAND (t1
, 0), TREE_OPERAND (t2
, 0));
1870 cmp
= cp_tree_equal (TREE_OPERAND (t1
, 0), TREE_OPERAND (t2
, 0));
1873 return simple_cst_list_equal (TREE_OPERAND (t1
, 1), TREE_OPERAND (t2
, 1));
1876 /* Special case: if either target is an unallocated VAR_DECL,
1877 it means that it's going to be unified with whatever the
1878 TARGET_EXPR is really supposed to initialize, so treat it
1879 as being equivalent to anything. */
1880 if ((TREE_CODE (TREE_OPERAND (t1
, 0)) == VAR_DECL
1881 && DECL_NAME (TREE_OPERAND (t1
, 0)) == NULL_TREE
1882 && DECL_RTL (TREE_OPERAND (t1
, 0)) == 0)
1883 || (TREE_CODE (TREE_OPERAND (t2
, 0)) == VAR_DECL
1884 && DECL_NAME (TREE_OPERAND (t2
, 0)) == NULL_TREE
1885 && DECL_RTL (TREE_OPERAND (t2
, 0)) == 0))
1888 cmp
= cp_tree_equal (TREE_OPERAND (t1
, 0), TREE_OPERAND (t2
, 0));
1891 return cp_tree_equal (TREE_OPERAND (t1
, 1), TREE_OPERAND (t2
, 1));
1893 case WITH_CLEANUP_EXPR
:
1894 cmp
= cp_tree_equal (TREE_OPERAND (t1
, 0), TREE_OPERAND (t2
, 0));
1897 return cp_tree_equal (TREE_OPERAND (t1
, 2), TREE_OPERAND (t1
, 2));
1900 if (TREE_OPERAND (t1
, 1) == TREE_OPERAND (t2
, 1))
1901 return cp_tree_equal (TREE_OPERAND (t1
, 0), TREE_OPERAND (t2
, 0));
1910 case TEMPLATE_PARM_INDEX
:
1911 return TEMPLATE_PARM_IDX (t1
) == TEMPLATE_PARM_IDX (t2
)
1912 && TEMPLATE_PARM_LEVEL (t1
) == TEMPLATE_PARM_LEVEL (t2
);
1916 if (TREE_CODE (TREE_OPERAND (t1
, 0)) != TREE_CODE (TREE_OPERAND (t2
, 0)))
1918 if (TREE_CODE_CLASS (TREE_CODE (TREE_OPERAND (t1
, 0))) == 't')
1919 return same_type_p (TREE_OPERAND (t1
, 0), TREE_OPERAND (t2
, 0));
1923 /* Two pointer-to-members are the same if they point to the same
1924 field or function in the same class. */
1925 return (PTRMEM_CST_MEMBER (t1
) == PTRMEM_CST_MEMBER (t2
)
1926 && same_type_p (PTRMEM_CST_CLASS (t1
), PTRMEM_CST_CLASS (t2
)));
1932 switch (TREE_CODE_CLASS (code1
))
1942 for (i
=0; i
<tree_code_length
[(int) code1
]; ++i
)
1944 cmp
= cp_tree_equal (TREE_OPERAND (t1
, i
), TREE_OPERAND (t2
, i
));
1954 /* Build a wrapper around some pointer PTR so we can use it as a tree. */
1957 build_ptr_wrapper (ptr
)
1960 tree t
= make_node (WRAPPER
);
1961 WRAPPER_PTR (t
) = ptr
;
1965 /* Same, but on the expression_obstack. */
1968 build_expr_ptr_wrapper (ptr
)
1971 return build_ptr_wrapper (ptr
);
1974 /* Build a wrapper around some integer I so we can use it as a tree. */
1977 build_int_wrapper (i
)
1980 tree t
= make_node (WRAPPER
);
1981 WRAPPER_INT (t
) = i
;
1986 build_srcloc (file
, line
)
1992 t
= make_node (SRCLOC
);
1993 SRCLOC_FILE (t
) = file
;
1994 SRCLOC_LINE (t
) = line
;
2000 build_srcloc_here ()
2002 return build_srcloc (input_filename
, lineno
);
2005 /* The type of ARG when used as an lvalue. */
2011 tree type
= TREE_TYPE (arg
);
2012 if (TREE_CODE (arg
) == OVERLOAD
)
2013 type
= unknown_type_node
;
2017 /* The type of ARG for printing error messages; denote lvalues with
2024 tree type
= TREE_TYPE (arg
);
2025 if (TREE_CODE (type
) == ARRAY_TYPE
)
2027 else if (real_lvalue_p (arg
))
2028 type
= build_reference_type (lvalue_type (arg
));
2029 else if (IS_AGGR_TYPE (type
))
2030 type
= lvalue_type (arg
);
2035 /* Does FUNCTION use a variable-length argument list? */
2038 varargs_function_p (function
)
2041 tree parm
= TYPE_ARG_TYPES (TREE_TYPE (function
));
2042 for (; parm
; parm
= TREE_CHAIN (parm
))
2043 if (TREE_VALUE (parm
) == void_type_node
)
2048 /* Returns 1 if decl is a member of a class. */
2054 tree ctx
= DECL_CONTEXT (decl
);
2055 return (ctx
&& TREE_CODE_CLASS (TREE_CODE (ctx
)) == 't');
2058 /* Create a placeholder for member access where we don't actually have an
2059 object that the access is against. */
2062 build_dummy_object (type
)
2065 tree decl
= build1 (NOP_EXPR
, build_pointer_type (type
), void_zero_node
);
2066 return build_indirect_ref (decl
, NULL_PTR
);
2069 /* We've gotten a reference to a member of TYPE. Return *this if appropriate,
2070 or a dummy object otherwise. If BINFOP is non-0, it is filled with the
2071 binfo path from current_class_type to TYPE, or 0. */
2074 maybe_dummy_object (type
, binfop
)
2080 if (current_class_type
2081 && get_base_distance (type
, current_class_type
, 0, binfop
) != -1)
2082 context
= current_class_type
;
2085 /* Reference from a nested class member function. */
2088 *binfop
= TYPE_BINFO (type
);
2091 if (current_class_ref
&& context
== current_class_type
)
2092 decl
= current_class_ref
;
2094 decl
= build_dummy_object (context
);
2099 /* Returns 1 if OB is a placeholder object, or a pointer to one. */
2102 is_dummy_object (ob
)
2105 if (TREE_CODE (ob
) == INDIRECT_REF
)
2106 ob
= TREE_OPERAND (ob
, 0);
2107 return (TREE_CODE (ob
) == NOP_EXPR
2108 && TREE_OPERAND (ob
, 0) == void_zero_node
);
2111 /* Returns 1 iff type T is a POD type, as defined in [basic.types]. */
2117 while (TREE_CODE (t
) == ARRAY_TYPE
)
2120 if (INTEGRAL_TYPE_P (t
))
2121 return 1; /* integral, character or enumeral type */
2122 if (FLOAT_TYPE_P (t
))
2125 return 1; /* pointer to non-member */
2126 if (TYPE_PTRMEM_P (t
))
2127 return 1; /* pointer to member object */
2128 if (TYPE_PTRMEMFUNC_P (t
))
2129 return 1; /* pointer to member function */
2131 if (! CLASS_TYPE_P (t
))
2132 return 0; /* other non-class type (reference or function) */
2133 if (CLASSTYPE_NON_POD_P (t
))
2138 /* Return a 1 if ATTR_NAME and ATTR_ARGS denote a valid C++-specific
2139 attribute for either declaration DECL or type TYPE and 0 otherwise.
2140 Plugged into valid_lang_attribute. */
2143 cp_valid_lang_attribute (attr_name
, attr_args
, decl
, type
)
2145 tree attr_args ATTRIBUTE_UNUSED
;
2146 tree decl ATTRIBUTE_UNUSED
;
2147 tree type ATTRIBUTE_UNUSED
;
2149 if (is_attribute_p ("com_interface", attr_name
))
2151 if (! flag_vtable_thunks
)
2153 error ("`com_interface' only supported with -fvtable-thunks");
2157 if (attr_args
!= NULL_TREE
2158 || decl
!= NULL_TREE
2159 || ! CLASS_TYPE_P (type
)
2160 || type
!= TYPE_MAIN_VARIANT (type
))
2162 warning ("`com_interface' attribute can only be applied to class definitions");
2166 CLASSTYPE_COM_INTERFACE (type
) = 1;
2169 else if (is_attribute_p ("init_priority", attr_name
))
2171 tree initp_expr
= (attr_args
? TREE_VALUE (attr_args
): NULL_TREE
);
2175 STRIP_NOPS (initp_expr
);
2177 if (!initp_expr
|| TREE_CODE (initp_expr
) != INTEGER_CST
)
2179 error ("requested init_priority is not an integer constant");
2183 pri
= TREE_INT_CST_LOW (initp_expr
);
2185 while (TREE_CODE (type
) == ARRAY_TYPE
)
2186 type
= TREE_TYPE (type
);
2188 if (decl
== NULL_TREE
2189 || TREE_CODE (decl
) != VAR_DECL
2190 || ! TREE_STATIC (decl
)
2191 || DECL_EXTERNAL (decl
)
2192 || (TREE_CODE (type
) != RECORD_TYPE
2193 && TREE_CODE (type
) != UNION_TYPE
)
2194 /* Static objects in functions are initialized the
2195 first time control passes through that
2196 function. This is not precise enough to pin down an
2197 init_priority value, so don't allow it. */
2198 || current_function_decl
)
2200 error ("can only use init_priority attribute on file-scope definitions of objects of class type");
2204 if (pri
> MAX_INIT_PRIORITY
|| pri
<= 0)
2206 error ("requested init_priority is out of range");
2210 /* Check for init_priorities that are reserved for
2211 language and runtime support implementations.*/
2212 if (pri
<= MAX_RESERVED_INIT_PRIORITY
)
2215 ("requested init_priority is reserved for internal use");
2218 DECL_INIT_PRIORITY (decl
) = pri
;
2225 /* Return a new PTRMEM_CST of the indicated TYPE. The MEMBER is the
2226 thing pointed to by the constant. */
2229 make_ptrmem_cst (type
, member
)
2233 tree ptrmem_cst
= make_node (PTRMEM_CST
);
2234 /* If would seem a great convenience if make_node would set
2235 TREE_CONSTANT for things of class `c', but it does not. */
2236 TREE_CONSTANT (ptrmem_cst
) = 1;
2237 TREE_TYPE (ptrmem_cst
) = type
;
2238 PTRMEM_CST_MEMBER (ptrmem_cst
) = member
;
2242 /* Mark ARG (which is really a list_hash_table **) for GC. */
2245 mark_list_hash (arg
)
2248 struct list_hash
*lh
;
2250 for (lh
= * ((struct list_hash
**) arg
); lh
; lh
= lh
->next
)
2251 ggc_mark_tree (lh
->list
);
2254 /* Initialize tree.c. */
2259 make_lang_type_fn
= cp_make_lang_type
;
2260 lang_unsave
= cp_unsave
;
2261 ggc_add_root (list_hash_table
,
2262 sizeof (list_hash_table
) / sizeof (struct list_hash
*),
2263 sizeof (struct list_hash
*),
2267 /* The SAVE_EXPR pointed to by TP is being copied. If ST contains
2268 information indicating to what new SAVE_EXPR this one should be
2269 mapped, use that one. Otherwise, create a new node and enter it in
2270 ST. FN is the function into which the copy will be placed. */
2273 remap_save_expr (tp
, st
, fn
, walk_subtrees
)
2281 /* See if we already encountered this SAVE_EXPR. */
2282 n
= splay_tree_lookup (st
, (splay_tree_key
) *tp
);
2284 /* If we didn't already remap this SAVE_EXPR, do so now. */
2287 tree t
= copy_node (*tp
);
2289 /* The SAVE_EXPR is now part of the function into which we
2290 are inlining this body. */
2291 SAVE_EXPR_CONTEXT (t
) = fn
;
2292 /* And we haven't evaluated it yet. */
2293 SAVE_EXPR_RTL (t
) = NULL_RTX
;
2294 /* Remember this SAVE_EXPR. */
2295 n
= splay_tree_insert (st
,
2296 (splay_tree_key
) *tp
,
2297 (splay_tree_value
) t
);
2300 /* We've already walked into this SAVE_EXPR, so we needn't do it
2304 /* Replace this SAVE_EXPR with the copy. */
2305 *tp
= (tree
) n
->value
;
2308 /* Called via walk_tree. If *TP points to a DECL_STMT for a local
2309 declaration, copies the declaration and enters it in the splay_tree
2310 pointed to by DATA (which is really a `splay_tree *'). */
2313 mark_local_for_remap_r (tp
, walk_subtrees
, data
)
2315 int *walk_subtrees ATTRIBUTE_UNUSED
;
2319 splay_tree st
= (splay_tree
) data
;
2321 if ((TREE_CODE (t
) == DECL_STMT
2322 && nonstatic_local_decl_p (DECL_STMT_DECL (t
)))
2323 || TREE_CODE (t
) == LABEL_STMT
)
2328 /* Figure out what's being declared. */
2329 decl
= (TREE_CODE (t
) == DECL_STMT
2330 ? DECL_STMT_DECL (t
) : LABEL_STMT_LABEL (t
));
2333 copy
= copy_decl_for_inlining (decl
,
2334 DECL_CONTEXT (decl
),
2335 DECL_CONTEXT (decl
));
2337 /* Remember the copy. */
2338 splay_tree_insert (st
,
2339 (splay_tree_key
) decl
,
2340 (splay_tree_value
) copy
);
2346 /* Called via walk_tree when an expression is unsaved. Using the
2347 splay_tree pointed to by ST (which is really a `splay_tree *'),
2348 remaps all local declarations to appropriate replacements. */
2351 cp_unsave_r (tp
, walk_subtrees
, data
)
2356 splay_tree st
= (splay_tree
) data
;
2359 /* Only a local declaration (variable or label). */
2360 if (nonstatic_local_decl_p (*tp
))
2362 /* Lookup the declaration. */
2363 n
= splay_tree_lookup (st
, (splay_tree_key
) *tp
);
2365 /* If it's there, remap it. */
2367 *tp
= (tree
) n
->value
;
2369 else if (TREE_CODE (*tp
) == SAVE_EXPR
)
2370 remap_save_expr (tp
, st
, current_function_decl
, walk_subtrees
);
2373 copy_tree_r (tp
, walk_subtrees
, NULL
);
2375 /* Do whatever unsaving is required. */
2376 unsave_expr_1 (*tp
);
2379 /* Keep iterating. */
2383 /* Called by unsave_expr_now whenever an expression (*TP) needs to be
2392 /* Create a splay-tree to map old local variable declarations to new
2394 st
= splay_tree_new (splay_tree_compare_pointers
, NULL
, NULL
);
2396 /* Walk the tree once figuring out what needs to be remapped. */
2397 walk_tree (tp
, mark_local_for_remap_r
, st
);
2399 /* Walk the tree again, copying, remapping, and unsaving. */
2400 walk_tree (tp
, cp_unsave_r
, st
);
2403 splay_tree_delete (st
);