1 /* Perform the semantic phase of parsing, i.e., the process of
2 building tree structure, checking semantic consistency, and
3 building RTL. These routines are used both during actual parsing
4 and during the instantiation of template functions.
6 Copyright (C) 1998, 1999, 2000 Free Software Foundation, Inc.
7 Written by Mark Mitchell (mmitchell@usa.net) based on code found
8 formerly in parse.y and pt.c.
10 This file is part of GNU CC.
12 GNU CC is free software; you can redistribute it and/or modify it
13 under the terms of the GNU General Public License as published by
14 the Free Software Foundation; either version 2, or (at your option)
17 GNU CC is distributed in the hope that it will be useful, but
18 WITHOUT ANY WARRANTY; without even the implied warranty of
19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 General Public License for more details.
22 You should have received a copy of the GNU General Public License
23 along with GNU CC; see the file COPYING. If not, write to the Free
24 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
40 /* There routines provide a modular interface to perform many parsing
41 operations. They may therefore be used during actual parsing, or
42 during template instantiation, which may be regarded as a
43 degenerate form of parsing. Since the current g++ parser is
44 lacking in several respects, and will be reimplemented, we are
45 attempting to move most code that is not directly related to
46 parsing into this file; that will make implementing the new parser
47 much easier since it will be able to make use of these routines. */
49 static tree maybe_convert_cond
PARAMS ((tree
));
50 static tree simplify_aggr_init_exprs_r
PARAMS ((tree
*, int *, void *));
51 static void deferred_type_access_control
PARAMS ((void));
52 static void emit_associated_thunks
PARAMS ((tree
));
53 static void genrtl_try_block
PARAMS ((tree
));
54 static void genrtl_handler
PARAMS ((tree
));
55 static void genrtl_catch_block
PARAMS ((tree
));
56 static void genrtl_ctor_stmt
PARAMS ((tree
));
57 static void genrtl_subobject
PARAMS ((tree
));
58 static void genrtl_named_return_value
PARAMS ((void));
59 static void cp_expand_stmt
PARAMS ((tree
));
60 static void genrtl_start_function
PARAMS ((tree
));
61 static void genrtl_finish_function
PARAMS ((tree
));
63 /* Finish processing the COND, the SUBSTMT condition for STMT. */
65 #define FINISH_COND(cond, stmt, substmt) \
67 if (last_tree != stmt) \
69 RECHAIN_STMTS (stmt, substmt); \
70 if (!processing_template_decl) \
72 cond = build_tree_list (substmt, cond); \
80 /* Returns non-zero if the current statement is a full expression,
81 i.e. temporaries created during that statement should be destroyed
82 at the end of the statement. */
85 stmts_are_full_exprs_p ()
87 return current_stmt_tree ()->stmts_are_full_exprs_p
;
90 /* Returns the stmt_tree (if any) to which statements are currently
91 being added. If there is no active statement-tree, NULL is
98 ? &cfun
->language
->x_stmt_tree
99 : &scope_chain
->x_stmt_tree
);
102 /* Nonzero if TYPE is an anonymous union or struct type. We have to use a
103 flag for this because "A union for which objects or pointers are
104 declared is not an anonymous union" [class.union]. */
107 anon_aggr_type_p (node
)
110 return (CLASS_TYPE_P (node
) && TYPE_LANG_SPECIFIC(node
)->anon_aggr
);
113 /* Finish a scope. */
118 tree block
= NULL_TREE
;
120 if (stmts_are_full_exprs_p ())
122 tree scope_stmts
= NULL_TREE
;
124 if (!processing_template_decl
)
125 scope_stmts
= add_scope_stmt (/*begin_p=*/0, /*partial_p=*/0);
127 block
= poplevel (kept_level_p (), 1, 0);
128 if (block
&& !processing_template_decl
)
130 SCOPE_STMT_BLOCK (TREE_PURPOSE (scope_stmts
)) = block
;
131 SCOPE_STMT_BLOCK (TREE_VALUE (scope_stmts
)) = block
;
138 /* Begin a new scope. */
143 if (stmts_are_full_exprs_p ())
146 if (!processing_template_decl
)
147 add_scope_stmt (/*begin_p=*/1, /*partial_p=*/0);
151 /* Finish a goto-statement. */
154 finish_goto_stmt (destination
)
157 if (TREE_CODE (destination
) == IDENTIFIER_NODE
)
158 destination
= lookup_label (destination
);
160 /* We warn about unused labels with -Wunused. That means we have to
161 mark the used labels as used. */
162 if (TREE_CODE (destination
) == LABEL_DECL
)
163 TREE_USED (destination
) = 1;
165 if (TREE_CODE (destination
) != LABEL_DECL
)
166 /* We don't inline calls to functions with computed gotos.
167 Those functions are typically up to some funny business,
168 and may be depending on the labels being at particular
169 addresses, or some such. */
170 DECL_UNINLINABLE (current_function_decl
) = 1;
172 check_goto (destination
);
174 add_stmt (build_stmt (GOTO_STMT
, destination
));
177 /* COND is the condition-expression for an if, while, etc.,
178 statement. Convert it to a boolean value, if appropriate. */
181 maybe_convert_cond (cond
)
184 /* Empty conditions remain empty. */
188 /* Wait until we instantiate templates before doing conversion. */
189 if (processing_template_decl
)
192 /* Do the conversion. */
193 cond
= convert_from_reference (cond
);
194 return condition_conversion (cond
);
197 /* Finish an expression-statement, whose EXPRESSION is as indicated. */
200 finish_expr_stmt (expr
)
203 if (expr
!= NULL_TREE
)
205 if (!processing_template_decl
206 && !(stmts_are_full_exprs_p ())
207 && ((TREE_CODE (TREE_TYPE (expr
)) == ARRAY_TYPE
209 || TREE_CODE (TREE_TYPE (expr
)) == FUNCTION_TYPE
))
210 expr
= default_conversion (expr
);
212 if (stmts_are_full_exprs_p ())
213 expr
= convert_to_void (expr
, "statement");
215 if (!processing_template_decl
)
216 expr
= break_out_cleanups (expr
);
218 add_stmt (build_stmt (EXPR_STMT
, expr
));
223 /* This was an expression-statement, so we save the type of the
225 last_expr_type
= expr
? TREE_TYPE (expr
) : NULL_TREE
;
229 /* Begin an if-statement. Returns a newly created IF_STMT if
237 r
= build_stmt (IF_STMT
, NULL_TREE
, NULL_TREE
, NULL_TREE
);
242 /* Process the COND of an if-statement, which may be given by
246 finish_if_stmt_cond (cond
, if_stmt
)
250 cond
= maybe_convert_cond (cond
);
251 FINISH_COND (cond
, if_stmt
, IF_COND (if_stmt
));
254 /* Finish the then-clause of an if-statement, which may be given by
258 finish_then_clause (if_stmt
)
261 RECHAIN_STMTS (if_stmt
, THEN_CLAUSE (if_stmt
));
266 /* Begin the else-clause of an if-statement. */
273 /* Finish the else-clause of an if-statement, which may be given by
277 finish_else_clause (if_stmt
)
280 RECHAIN_STMTS (if_stmt
, ELSE_CLAUSE (if_stmt
));
283 /* Finsh an if-statement. */
295 /* If COND wasn't a declaration, clear out the
296 block we made for it and start a new one here so the
297 optimization in expand_end_loop will work. */
298 if (getdecls () == NULL_TREE
)
305 /* Begin a while-statement. Returns a newly created WHILE_STMT if
312 r
= build_stmt (WHILE_STMT
, NULL_TREE
, NULL_TREE
);
318 /* Process the COND of a while-statement, which may be given by
322 finish_while_stmt_cond (cond
, while_stmt
)
326 cond
= maybe_convert_cond (cond
);
327 FINISH_COND (cond
, while_stmt
, WHILE_COND (while_stmt
));
331 /* Finish a while-statement, which may be given by WHILE_STMT. */
334 finish_while_stmt (while_stmt
)
338 RECHAIN_STMTS (while_stmt
, WHILE_BODY (while_stmt
));
342 /* Begin a do-statement. Returns a newly created DO_STMT if
348 tree r
= build_stmt (DO_STMT
, NULL_TREE
, NULL_TREE
);
353 /* Finish the body of a do-statement, which may be given by DO_STMT. */
356 finish_do_body (do_stmt
)
359 RECHAIN_STMTS (do_stmt
, DO_BODY (do_stmt
));
362 /* Finish a do-statement, which may be given by DO_STMT, and whose
363 COND is as indicated. */
366 finish_do_stmt (cond
, do_stmt
)
370 cond
= maybe_convert_cond (cond
);
371 DO_COND (do_stmt
) = cond
;
375 /* Finish a return-statement. The EXPRESSION returned, if any, is as
379 finish_return_stmt (expr
)
382 if (!processing_template_decl
)
383 expr
= check_return_expr (expr
);
384 if (!processing_template_decl
)
386 if (DECL_CONSTRUCTOR_P (current_function_decl
) && ctor_label
)
388 /* Even returns without a value in a constructor must return
389 `this'. We accomplish this by sending all returns in a
390 constructor to the CTOR_LABEL; finish_function emits code to
391 return a value there. When we finally generate the real
392 return statement, CTOR_LABEL is no longer set, and we fall
393 through into the normal return-processing code below. */
394 finish_goto_stmt (ctor_label
);
397 else if (DECL_DESTRUCTOR_P (current_function_decl
))
399 /* Similarly, all destructors must run destructors for
400 base-classes before returning. So, all returns in a
401 destructor get sent to the DTOR_LABEL; finsh_function emits
402 code to return a value there. */
403 finish_goto_stmt (dtor_label
);
407 add_stmt (build_stmt (RETURN_STMT
, expr
));
411 /* Begin a for-statement. Returns a new FOR_STMT if appropriate. */
418 r
= build_stmt (FOR_STMT
, NULL_TREE
, NULL_TREE
,
419 NULL_TREE
, NULL_TREE
);
420 NEW_FOR_SCOPE_P (r
) = flag_new_for_scope
> 0;
422 if (NEW_FOR_SCOPE_P (r
))
425 note_level_for_for ();
431 /* Finish the for-init-statement of a for-statement, which may be
432 given by FOR_STMT. */
435 finish_for_init_stmt (for_stmt
)
438 if (last_tree
!= for_stmt
)
439 RECHAIN_STMTS (for_stmt
, FOR_INIT_STMT (for_stmt
));
443 /* Finish the COND of a for-statement, which may be given by
447 finish_for_cond (cond
, for_stmt
)
451 cond
= maybe_convert_cond (cond
);
452 FINISH_COND (cond
, for_stmt
, FOR_COND (for_stmt
));
456 /* Finish the increment-EXPRESSION in a for-statement, which may be
457 given by FOR_STMT. */
460 finish_for_expr (expr
, for_stmt
)
464 FOR_EXPR (for_stmt
) = expr
;
467 /* Finish the body of a for-statement, which may be given by
468 FOR_STMT. The increment-EXPR for the loop must be
472 finish_for_stmt (for_stmt
)
475 /* Pop the scope for the body of the loop. */
477 RECHAIN_STMTS (for_stmt
, FOR_BODY (for_stmt
));
478 if (NEW_FOR_SCOPE_P (for_stmt
))
483 /* Finish a break-statement. */
488 add_stmt (build_break_stmt ());
491 /* Finish a continue-statement. */
494 finish_continue_stmt ()
496 add_stmt (build_continue_stmt ());
499 /* Begin a switch-statement. Returns a new SWITCH_STMT if
506 r
= build_stmt (SWITCH_STMT
, NULL_TREE
, NULL_TREE
);
512 /* Finish the cond of a switch-statement. */
515 finish_switch_cond (cond
, switch_stmt
)
519 if (!processing_template_decl
)
524 /* Convert the condition to an integer or enumeration type. */
525 cond
= build_expr_type_conversion (WANT_INT
| WANT_ENUM
, cond
, 1);
526 if (cond
== NULL_TREE
)
528 error ("switch quantity not an integer");
529 cond
= error_mark_node
;
531 if (cond
!= error_mark_node
)
533 cond
= default_conversion (cond
);
534 cond
= fold (build1 (CLEANUP_POINT_EXPR
, TREE_TYPE (cond
), cond
));
537 type
= TREE_TYPE (cond
);
538 index
= get_unwidened (cond
, NULL_TREE
);
539 /* We can't strip a conversion from a signed type to an unsigned,
540 because if we did, int_fits_type_p would do the wrong thing
541 when checking case values for being in range,
542 and it's too hard to do the right thing. */
543 if (TREE_UNSIGNED (TREE_TYPE (cond
))
544 == TREE_UNSIGNED (TREE_TYPE (index
)))
547 FINISH_COND (cond
, switch_stmt
, SWITCH_COND (switch_stmt
));
548 push_switch (switch_stmt
);
551 /* Finish the body of a switch-statement, which may be given by
552 SWITCH_STMT. The COND to switch on is indicated. */
555 finish_switch_stmt (switch_stmt
)
558 RECHAIN_STMTS (switch_stmt
, SWITCH_BODY (switch_stmt
));
564 /* Generate the RTL for T, which is a TRY_BLOCK. */
572 expand_eh_region_start ();
573 expand_stmt (TRY_STMTS (t
));
574 expand_eh_region_end (protect_with_terminate (TRY_HANDLERS (t
)));
578 if (!FN_TRY_BLOCK_P (t
))
579 emit_line_note (input_filename
, lineno
);
580 expand_start_try_stmts ();
582 expand_stmt (TRY_STMTS (t
));
584 if (FN_TRY_BLOCK_P (t
))
586 end_protect_partials ();
587 expand_start_all_catch ();
588 in_function_try_handler
= 1;
589 expand_stmt (TRY_HANDLERS (t
));
590 in_function_try_handler
= 0;
591 expand_end_all_catch ();
595 expand_start_all_catch ();
596 expand_stmt (TRY_HANDLERS (t
));
597 expand_end_all_catch ();
602 /* Begin a try-block. Returns a newly-created TRY_BLOCK if
608 tree r
= build_stmt (TRY_BLOCK
, NULL_TREE
, NULL_TREE
);
613 /* Likewise, for a function-try-block. */
616 begin_function_try_block ()
618 tree r
= build_stmt (TRY_BLOCK
, NULL_TREE
, NULL_TREE
);
619 FN_TRY_BLOCK_P (r
) = 1;
624 /* Finish a try-block, which may be given by TRY_BLOCK. */
627 finish_try_block (try_block
)
630 RECHAIN_STMTS (try_block
, TRY_STMTS (try_block
));
633 /* Finish the body of a cleanup try-block, which may be given by
637 finish_cleanup_try_block (try_block
)
640 RECHAIN_STMTS (try_block
, TRY_STMTS (try_block
));
643 /* Finish an implicitly generated try-block, with a cleanup is given
647 finish_cleanup (cleanup
, try_block
)
651 TRY_HANDLERS (try_block
) = cleanup
;
652 CLEANUP_P (try_block
) = 1;
655 /* Likewise, for a function-try-block. */
658 finish_function_try_block (try_block
)
661 if (TREE_CHAIN (try_block
)
662 && TREE_CODE (TREE_CHAIN (try_block
)) == CTOR_INITIALIZER
)
664 /* Chain the compound statement after the CTOR_INITIALIZER. */
665 TREE_CHAIN (TREE_CHAIN (try_block
)) = last_tree
;
666 /* And make the CTOR_INITIALIZER the body of the try-block. */
667 RECHAIN_STMTS (try_block
, TRY_STMTS (try_block
));
670 RECHAIN_STMTS (try_block
, TRY_STMTS (try_block
));
671 in_function_try_handler
= 1;
674 /* Finish a handler-sequence for a try-block, which may be given by
678 finish_handler_sequence (try_block
)
681 RECHAIN_STMTS (try_block
, TRY_HANDLERS (try_block
));
682 check_handlers (TRY_HANDLERS (try_block
));
685 /* Likewise, for a function-try-block. */
688 finish_function_handler_sequence (try_block
)
691 in_function_try_handler
= 0;
692 RECHAIN_STMTS (try_block
, TRY_HANDLERS (try_block
));
693 check_handlers (TRY_HANDLERS (try_block
));
696 /* Generate the RTL for T, which is a HANDLER. */
702 genrtl_do_pushlevel ();
703 expand_stmt (HANDLER_BODY (t
));
704 if (!processing_template_decl
)
706 /* Fall to outside the try statement when done executing
707 handler and we fall off end of handler. This is jump
708 Lresume in the documentation. */
709 expand_goto (top_label_entry (&caught_return_label_stack
));
710 end_catch_handler ();
714 /* Begin a handler. Returns a HANDLER if appropriate. */
720 r
= build_stmt (HANDLER
, NULL_TREE
, NULL_TREE
);
726 /* Finish the handler-parameters for a handler, which may be given by
727 HANDLER. DECL is the declaration for the catch parameter, or NULL
728 if this is a `catch (...)' clause. */
731 finish_handler_parms (decl
, handler
)
735 tree blocks
= NULL_TREE
;
737 if (processing_template_decl
)
741 decl
= pushdecl (decl
);
742 decl
= push_template_decl (decl
);
743 add_decl_stmt (decl
);
744 RECHAIN_STMTS (handler
, HANDLER_PARMS (handler
));
748 blocks
= expand_start_catch_block (decl
);
751 TREE_TYPE (handler
) = TREE_TYPE (decl
);
756 /* Generate the RTL for a CATCH_BLOCK. */
759 genrtl_catch_block (type
)
762 start_catch_handler (type
);
765 /* Note the beginning of a handler for TYPE. This function is called
766 at the point to which control should be transferred when an
767 appropriately-typed exception is thrown. */
770 begin_catch_block (type
)
773 add_stmt (build (START_CATCH_STMT
, type
));
776 /* Finish a handler, which may be given by HANDLER. The BLOCKs are
777 the return value from the matching call to finish_handler_parms. */
780 finish_handler (blocks
, handler
)
784 if (!processing_template_decl
)
785 expand_end_catch_block (blocks
);
787 RECHAIN_STMTS (handler
, HANDLER_BODY (handler
));
790 /* Generate the RTL for T, which is a CTOR_STMT. */
796 if (CTOR_BEGIN_P (t
))
797 begin_protect_partials ();
799 /* After this point, any exceptions will cause the
800 destructor to be executed, so we no longer need to worry
801 about destroying the various subobjects ourselves. */
802 end_protect_partials ();
805 /* Begin a compound-statement. If HAS_NO_SCOPE is non-zero, the
806 compound-statement does not define a scope. Returns a new
807 COMPOUND_STMT if appropriate. */
810 begin_compound_stmt (has_no_scope
)
816 r
= build_stmt (COMPOUND_STMT
, NULL_TREE
);
818 if (last_tree
&& TREE_CODE (last_tree
) == TRY_BLOCK
)
823 COMPOUND_STMT_NO_SCOPE (r
) = 1;
825 last_expr_type
= NULL_TREE
;
831 note_level_for_eh ();
834 /* Normally, we try hard to keep the BLOCK for a
835 statement-expression. But, if it's a statement-expression with
836 a scopeless block, there's nothing to keep, and we don't want
837 to accidentally keep a block *inside* the scopeless block. */
840 /* If this is the outermost block of the function, declare the
841 variables __FUNCTION__, __PRETTY_FUNCTION__, and so forth. */
843 && !function_name_declared_p
846 function_name_declared_p
= 1;
847 declare_function_name ();
853 /* Finish a compound-statement, which may be given by COMPOUND_STMT.
854 If HAS_NO_SCOPE is non-zero, the compound statement does not define
858 finish_compound_stmt (has_no_scope
, compound_stmt
)
870 RECHAIN_STMTS (compound_stmt
, COMPOUND_BODY (compound_stmt
));
872 /* When we call finish_stmt we will lose LAST_EXPR_TYPE. But, since
873 the precise purpose of that variable is store the type of the
874 last expression statement within the last compound statement, we
875 preserve the value. */
883 /* Finish an asm-statement, whose components are a CV_QUALIFIER, a
884 STRING, some OUTPUT_OPERANDS, some INPUT_OPERANDS, and some
888 finish_asm_stmt (cv_qualifier
, string
, output_operands
,
889 input_operands
, clobbers
)
892 tree output_operands
;
899 if (TREE_CHAIN (string
))
900 string
= combine_strings (string
);
902 if (cv_qualifier
!= NULL_TREE
903 && cv_qualifier
!= ridpointers
[(int) RID_VOLATILE
])
905 cp_warning ("%s qualifier ignored on asm",
906 IDENTIFIER_POINTER (cv_qualifier
));
907 cv_qualifier
= NULL_TREE
;
910 if (!processing_template_decl
)
911 for (t
= input_operands
; t
; t
= TREE_CHAIN (t
))
912 TREE_VALUE (t
) = decay_conversion (TREE_VALUE (t
));
914 r
= build_stmt (ASM_STMT
, cv_qualifier
, string
,
915 output_operands
, input_operands
,
920 /* Finish a label with the indicated NAME. */
923 finish_label_stmt (name
)
926 tree decl
= define_label (input_filename
, lineno
, name
);
927 add_stmt (build_stmt (LABEL_STMT
, decl
));
930 /* Finish a series of declarations for local labels. G++ allows users
931 to declare "local" labels, i.e., labels with scope. This extension
932 is useful when writing code involving statement-expressions. */
935 finish_label_decl (name
)
938 tree decl
= declare_local_label (name
);
939 add_decl_stmt (decl
);
942 /* Generate the RTL for a SUBOBJECT. */
945 genrtl_subobject (cleanup
)
948 add_partial_entry (cleanup
);
951 /* We're in a constructor, and have just constructed a a subobject of
952 *THIS. CLEANUP is code to run if an exception is thrown before the
953 end of the current function is reached. */
956 finish_subobject (cleanup
)
959 tree r
= build_stmt (SUBOBJECT
, cleanup
);
963 /* When DECL goes out of scope, make sure that CLEANUP is executed. */
966 finish_decl_cleanup (decl
, cleanup
)
970 add_stmt (build_stmt (CLEANUP_STMT
, decl
, cleanup
));
973 /* Generate the RTL for a RETURN_INIT. */
976 genrtl_named_return_value ()
978 tree decl
= DECL_RESULT (current_function_decl
);
980 /* If this named return value comes in a register, put it in a
982 if (DECL_REGISTER (decl
))
984 /* Note that the mode of the old DECL_RTL may be wider than the
985 mode of DECL_RESULT, depending on the calling conventions for
986 the processor. For example, on the Alpha, a 32-bit integer
987 is returned in a DImode register -- the DECL_RESULT has
988 SImode but the DECL_RTL for the DECL_RESULT has DImode. So,
989 here, we use the mode the back-end has already assigned for
991 DECL_RTL (decl
) = gen_reg_rtx (GET_MODE (DECL_RTL (decl
)));
992 if (TREE_ADDRESSABLE (decl
))
993 put_var_into_stack (decl
);
996 emit_local_var (decl
);
999 /* Bind a name and initialization to the return value of
1000 the current function. */
1003 finish_named_return_value (return_id
, init
)
1004 tree return_id
, init
;
1006 tree decl
= DECL_RESULT (current_function_decl
);
1008 /* Give this error as many times as there are occurrences, so that
1009 users can use Emacs compilation buffers to find and fix all such
1012 pedwarn ("ISO C++ does not permit named return values");
1013 cp_deprecated ("the named return value extension");
1015 if (return_id
!= NULL_TREE
)
1017 if (DECL_NAME (decl
) == NULL_TREE
)
1019 DECL_NAME (decl
) = return_id
;
1020 DECL_ASSEMBLER_NAME (decl
) = return_id
;
1024 cp_error ("return identifier `%D' already in place", return_id
);
1029 /* Can't let this happen for constructors. */
1030 if (DECL_CONSTRUCTOR_P (current_function_decl
))
1032 error ("can't redefine default return value for constructors");
1036 /* If we have a named return value, put that in our scope as well. */
1037 if (DECL_NAME (decl
) != NULL_TREE
)
1039 /* Let `cp_finish_decl' know that this initializer is ok. */
1040 DECL_INITIAL (decl
) = init
;
1041 if (doing_semantic_analysis_p ())
1043 if (!processing_template_decl
)
1045 cp_finish_decl (decl
, init
, NULL_TREE
, 0);
1046 add_stmt (build_stmt (RETURN_INIT
, NULL_TREE
, NULL_TREE
));
1049 add_stmt (build_stmt (RETURN_INIT
, return_id
, init
));
1052 /* Don't use tree-inlining for functions with named return values.
1053 That doesn't work properly because we don't do any translation of
1054 the RETURN_INITs when they are copied. */
1055 DECL_UNINLINABLE (current_function_decl
) = 1;
1058 /* The INIT_LIST is a list of mem-initializers, in the order they were
1059 written by the user. The TREE_VALUE of each node is a list of
1060 initializers for a particular subobject. The TREE_PURPOSE is a
1061 FIELD_DECL is the initializer is for a non-static data member, and
1062 a class type if the initializer is for a base class. */
1065 finish_mem_initializers (init_list
)
1068 tree member_init_list
;
1069 tree base_init_list
;
1070 tree last_base_warned_about
;
1074 member_init_list
= NULL_TREE
;
1075 base_init_list
= NULL_TREE
;
1076 last_base_warned_about
= NULL_TREE
;
1078 for (init
= init_list
; init
; init
= next
)
1080 next
= TREE_CHAIN (init
);
1081 if (TREE_CODE (TREE_PURPOSE (init
)) == FIELD_DECL
)
1083 TREE_CHAIN (init
) = member_init_list
;
1084 member_init_list
= init
;
1086 /* We're running through the initializers from right to left
1087 as we process them here. So, if we see a data member
1088 initializer after we see a base initializer, that
1089 actually means that the base initializer preceeded the
1090 data member initializer. */
1091 if (warn_reorder
&& last_base_warned_about
!= base_init_list
)
1095 for (base
= base_init_list
;
1096 base
!= last_base_warned_about
;
1097 base
= TREE_CHAIN (base
))
1099 cp_warning ("base initializer for `%T'",
1100 TREE_PURPOSE (base
));
1101 warning (" will be re-ordered to precede member initializations");
1104 last_base_warned_about
= base_init_list
;
1109 TREE_CHAIN (init
) = base_init_list
;
1110 base_init_list
= init
;
1114 setup_vtbl_ptr (member_init_list
, base_init_list
);
1117 /* Cache the value of this class's main virtual function table pointer
1118 in a register variable. This will save one indirection if a
1119 more than one virtual function call is made this function. */
1122 setup_vtbl_ptr (member_init_list
, base_init_list
)
1123 tree member_init_list
;
1124 tree base_init_list
;
1126 my_friendly_assert (doing_semantic_analysis_p (), 19990919);
1128 /* If we've already done this, there's no need to do it again. */
1132 if (DECL_CONSTRUCTOR_P (current_function_decl
))
1134 if (processing_template_decl
)
1135 add_stmt (build_min_nt
1137 member_init_list
, base_init_list
));
1142 /* Mark the beginning of the constructor. */
1143 ctor_stmt
= build_stmt (CTOR_STMT
);
1144 CTOR_BEGIN_P (ctor_stmt
) = 1;
1145 add_stmt (ctor_stmt
);
1147 /* And actually initialize the base-classes and members. */
1148 emit_base_init (member_init_list
, base_init_list
);
1151 else if (DECL_DESTRUCTOR_P (current_function_decl
)
1152 && !processing_template_decl
)
1158 /* If the dtor is empty, and we know there is not any possible
1159 way we could use any vtable entries, before they are possibly
1160 set by a base class dtor, we don't have to setup the vtables,
1161 as we know that any base class dtor will set up any vtables
1162 it needs. We avoid MI, because one base class dtor can do a
1163 virtual dispatch to an overridden function that would need to
1164 have a non-related vtable set up, we cannot avoid setting up
1165 vtables in that case. We could change this to see if there
1166 is just one vtable. */
1167 if_stmt
= begin_if_stmt ();
1169 /* If it is not safe to avoid setting up the vtables, then
1170 someone will change the condition to be boolean_true_node.
1171 (Actually, for now, we do not have code to set the condition
1172 appropriately, so we just assume that we always need to
1173 initialize the vtables.) */
1174 finish_if_stmt_cond (boolean_true_node
, if_stmt
);
1175 current_vcalls_possible_p
= &IF_COND (if_stmt
);
1177 /* Don't declare __PRETTY_FUNCTION__ and friends here when we
1178 open the block for the if-body. */
1179 saved_cfnd
= function_name_declared_p
;
1180 function_name_declared_p
= 1;
1181 compound_stmt
= begin_compound_stmt (/*has_no_scope=*/0);
1182 function_name_declared_p
= saved_cfnd
;
1184 /* Make all virtual function table pointers in non-virtual base
1185 classes point to CURRENT_CLASS_TYPE's virtual function
1187 initialize_vtbl_ptrs (current_class_ptr
);
1189 finish_compound_stmt (/*has_no_scope=*/0, compound_stmt
);
1190 finish_then_clause (if_stmt
);
1194 /* Always keep the BLOCK node associated with the outermost pair of
1195 curly braces of a function. These are needed for correct
1196 operation of dwarfout.c. */
1197 keep_next_level (1);
1199 /* The virtual function tables are set up now. */
1203 /* Returns the stack of SCOPE_STMTs for the current function. */
1206 current_scope_stmt_stack ()
1208 return &cfun
->language
->x_scope_stmt_stack
;
1211 /* Finish a parenthesized expression EXPR. */
1214 finish_parenthesized_expr (expr
)
1217 if (IS_EXPR_CODE_CLASS (TREE_CODE_CLASS (TREE_CODE (expr
))))
1218 /* This inhibits warnings in truthvalue_conversion. */
1219 C_SET_EXP_ORIGINAL_CODE (expr
, ERROR_MARK
);
1221 if (TREE_CODE (expr
) == OFFSET_REF
)
1222 /* [expr.unary.op]/3 The qualified id of a pointer-to-member must not be
1223 enclosed in parentheses. */
1224 PTRMEM_OK_P (expr
) = 0;
1228 /* Begin a statement-expression. The value returned must be passed to
1229 finish_stmt_expr. */
1234 /* If we're outside a function, we won't have a statement-tree to
1235 work with. But, if we see a statement-expression we need to
1237 if (! cfun
&& !last_tree
)
1238 begin_stmt_tree (&scope_chain
->x_saved_tree
);
1240 keep_next_level (1);
1241 /* If we're building a statement tree, then the upcoming compound
1242 statement will be chained onto the tree structure, starting at
1243 last_tree. We return last_tree so that we can later unhook the
1244 compound statement. */
1248 /* Used when beginning a statement-expression outside function scope.
1249 For example, when handling a file-scope initializer, we use this
1253 begin_global_stmt_expr ()
1255 if (! cfun
&& !last_tree
)
1256 begin_stmt_tree (&scope_chain
->x_saved_tree
);
1258 keep_next_level (1);
1260 return (last_tree
!= NULL_TREE
) ? last_tree
: expand_start_stmt_expr();
1263 /* Finish the STMT_EXPR last begun with begin_global_stmt_expr. */
1266 finish_global_stmt_expr (stmt_expr
)
1269 stmt_expr
= expand_end_stmt_expr (stmt_expr
);
1272 && TREE_CHAIN (scope_chain
->x_saved_tree
) == NULL_TREE
)
1273 finish_stmt_tree (&scope_chain
->x_saved_tree
);
1278 /* Finish a statement-expression. RTL_EXPR should be the value
1279 returned by the previous begin_stmt_expr; EXPR is the
1280 statement-expression. Returns an expression representing the
1281 statement-expression. */
1284 finish_stmt_expr (rtl_expr
)
1289 /* If the last thing in the statement-expression was not an
1290 expression-statement, then it has type `void'. */
1291 if (!last_expr_type
)
1292 last_expr_type
= void_type_node
;
1293 result
= build_min (STMT_EXPR
, last_expr_type
, last_tree
);
1294 TREE_SIDE_EFFECTS (result
) = 1;
1296 /* Remove the compound statement from the tree structure; it is
1297 now saved in the STMT_EXPR. */
1298 last_tree
= rtl_expr
;
1299 TREE_CHAIN (last_tree
) = NULL_TREE
;
1301 /* If we created a statement-tree for this statement-expression,
1304 && TREE_CHAIN (scope_chain
->x_saved_tree
) == NULL_TREE
)
1305 finish_stmt_tree (&scope_chain
->x_saved_tree
);
1310 /* Finish a call to FN with ARGS. Returns a representation of the
1314 finish_call_expr (fn
, args
, koenig
)
1323 if (TREE_CODE (fn
) == BIT_NOT_EXPR
)
1324 fn
= build_x_unary_op (BIT_NOT_EXPR
, TREE_OPERAND (fn
, 0));
1325 else if (TREE_CODE (fn
) != TEMPLATE_ID_EXPR
)
1326 fn
= do_identifier (fn
, 2, args
);
1328 result
= build_x_function_call (fn
, args
, current_class_ref
);
1330 if (TREE_CODE (result
) == CALL_EXPR
1331 && (! TREE_TYPE (result
)
1332 || TREE_CODE (TREE_TYPE (result
)) != VOID_TYPE
))
1333 result
= require_complete_type (result
);
1338 /* Finish a call to a postfix increment or decrement or EXPR. (Which
1339 is indicated by CODE, which should be POSTINCREMENT_EXPR or
1340 POSTDECREMENT_EXPR.) */
1343 finish_increment_expr (expr
, code
)
1345 enum tree_code code
;
1347 /* If we get an OFFSET_REF, turn it into what it really means (e.g.,
1348 a COMPONENT_REF). This way if we've got, say, a reference to a
1349 static member that's being operated on, we don't end up trying to
1350 find a member operator for the class it's in. */
1352 if (TREE_CODE (expr
) == OFFSET_REF
)
1353 expr
= resolve_offset_ref (expr
);
1354 return build_x_unary_op (code
, expr
);
1357 /* Finish a use of `this'. Returns an expression for `this'. */
1364 if (current_class_ptr
)
1366 #ifdef WARNING_ABOUT_CCD
1367 TREE_USED (current_class_ptr
) = 1;
1369 result
= current_class_ptr
;
1371 else if (current_function_decl
1372 && DECL_STATIC_FUNCTION_P (current_function_decl
))
1374 error ("`this' is unavailable for static member functions");
1375 result
= error_mark_node
;
1379 if (current_function_decl
)
1380 error ("invalid use of `this' in non-member function");
1382 error ("invalid use of `this' at top level");
1383 result
= error_mark_node
;
1389 /* Finish a member function call using OBJECT and ARGS as arguments to
1390 FN. Returns an expression for the call. */
1393 finish_object_call_expr (fn
, object
, args
)
1399 /* This is a future direction of this code, but because
1400 build_x_function_call cannot always undo what is done in
1401 build_component_ref entirely yet, we cannot do this. */
1403 tree real_fn
= build_component_ref (object
, fn
, NULL_TREE
, 1);
1404 return finish_call_expr (real_fn
, args
);
1406 if (DECL_DECLARES_TYPE_P (fn
))
1408 if (processing_template_decl
)
1409 /* This can happen on code like:
1412 template <class T> void f(T t) {
1416 We just grab the underlying IDENTIFIER. */
1417 fn
= DECL_NAME (fn
);
1420 cp_error ("calling type `%T' like a method", fn
);
1421 return error_mark_node
;
1425 return build_method_call (object
, fn
, args
, NULL_TREE
, LOOKUP_NORMAL
);
1429 /* Finish a qualified member function call using OBJECT and ARGS as
1430 arguments to FN. Returns an expression for the call. */
1433 finish_qualified_object_call_expr (fn
, object
, args
)
1438 return build_scoped_method_call (object
, TREE_OPERAND (fn
, 0),
1439 TREE_OPERAND (fn
, 1), args
);
1442 /* Finish a pseudo-destructor call expression of OBJECT, with SCOPE
1443 being the scope, if any, of DESTRUCTOR. Returns an expression for
1447 finish_pseudo_destructor_call_expr (object
, scope
, destructor
)
1452 if (processing_template_decl
)
1453 return build_min_nt (PSEUDO_DTOR_EXPR
, object
, scope
, destructor
);
1455 if (scope
&& scope
!= destructor
)
1456 cp_error ("destructor specifier `%T::~%T()' must have matching names",
1459 if ((scope
== NULL_TREE
|| IDENTIFIER_GLOBAL_VALUE (destructor
))
1460 && (TREE_CODE (TREE_TYPE (object
)) !=
1461 TREE_CODE (TREE_TYPE (IDENTIFIER_GLOBAL_VALUE (destructor
)))))
1462 cp_error ("`%E' is not of type `%T'", object
, destructor
);
1464 return cp_convert (void_type_node
, object
);
1467 /* Finish a call to a globally qualified member function FN using
1468 ARGS. Returns an expression for the call. */
1471 finish_qualified_call_expr (fn
, args
)
1475 if (processing_template_decl
)
1476 return build_min_nt (CALL_EXPR
, fn
, args
, NULL_TREE
);
1478 return build_member_call (TREE_OPERAND (fn
, 0),
1479 TREE_OPERAND (fn
, 1),
1483 /* Finish an expression taking the address of LABEL. Returns an
1484 expression for the address. */
1487 finish_label_address_expr (label
)
1492 label
= lookup_label (label
);
1493 if (label
== NULL_TREE
)
1494 result
= null_pointer_node
;
1497 TREE_USED (label
) = 1;
1498 result
= build1 (ADDR_EXPR
, ptr_type_node
, label
);
1499 TREE_CONSTANT (result
) = 1;
1500 /* This function cannot be inlined. All jumps to the addressed
1501 label should wind up at the same point. */
1502 DECL_UNINLINABLE (current_function_decl
) = 1;
1508 /* Finish an expression of the form CODE EXPR. */
1511 finish_unary_op_expr (code
, expr
)
1512 enum tree_code code
;
1515 tree result
= build_x_unary_op (code
, expr
);
1516 /* Inside a template, build_x_unary_op does not fold the
1517 expression. So check whether the result is folded before
1518 setting TREE_NEGATED_INT. */
1519 if (code
== NEGATE_EXPR
&& TREE_CODE (expr
) == INTEGER_CST
1520 && TREE_CODE (result
) == INTEGER_CST
1521 && !TREE_UNSIGNED (TREE_TYPE (result
))
1522 && INT_CST_LT (result
, integer_zero_node
))
1523 TREE_NEGATED_INT (result
) = 1;
1524 overflow_warning (result
);
1528 /* Finish an id-expression. */
1531 finish_id_expr (expr
)
1534 if (TREE_CODE (expr
) == IDENTIFIER_NODE
)
1535 expr
= do_identifier (expr
, 1, NULL_TREE
);
1540 static tree current_type_lookups
;
1542 /* Perform deferred access control for types used in the type of a
1546 deferred_type_access_control ()
1548 tree lookup
= type_lookups
;
1550 if (lookup
== error_mark_node
)
1553 for (; lookup
; lookup
= TREE_CHAIN (lookup
))
1554 enforce_access (TREE_PURPOSE (lookup
), TREE_VALUE (lookup
));
1558 decl_type_access_control (decl
)
1563 if (type_lookups
== error_mark_node
)
1566 save_fn
= current_function_decl
;
1568 if (decl
&& TREE_CODE (decl
) == FUNCTION_DECL
)
1569 current_function_decl
= decl
;
1571 deferred_type_access_control ();
1573 current_function_decl
= save_fn
;
1575 /* Now strip away the checks for the current declarator; they were
1576 added to type_lookups after typed_declspecs saved the copy that
1577 ended up in current_type_lookups. */
1578 type_lookups
= current_type_lookups
;
1582 save_type_access_control (lookups
)
1585 current_type_lookups
= lookups
;
1588 /* Begin a function definition declared with DECL_SPECS and
1589 DECLARATOR. Returns non-zero if the function-declaration is
1593 begin_function_definition (decl_specs
, declarator
)
1600 split_specs_attrs (decl_specs
, &specs
, &attrs
);
1601 if (!start_function (specs
, declarator
, attrs
, SF_DEFAULT
))
1604 deferred_type_access_control ();
1605 type_lookups
= error_mark_node
;
1607 /* The things we're about to see are not directly qualified by any
1608 template headers we've seen thus far. */
1609 reset_specialization ();
1614 /* Begin a constructor declarator of the form `SCOPE::NAME'. Returns
1618 begin_constructor_declarator (scope
, name
)
1622 tree result
= build_parse_node (SCOPE_REF
, scope
, name
);
1623 enter_scope_of (result
);
1627 /* Finish an init-declarator. Returns a DECL. */
1630 finish_declarator (declarator
, declspecs
, attributes
,
1631 prefix_attributes
, initialized
)
1635 tree prefix_attributes
;
1638 return start_decl (declarator
, declspecs
, initialized
, attributes
,
1642 /* Finish a translation unit. */
1645 finish_translation_unit ()
1647 /* In case there were missing closebraces,
1648 get us back to the global binding level. */
1650 while (current_namespace
!= global_namespace
)
1655 /* Finish a template type parameter, specified as AGGR IDENTIFIER.
1656 Returns the parameter. */
1659 finish_template_type_parm (aggr
, identifier
)
1663 if (aggr
!= class_type_node
)
1665 pedwarn ("template type parameters must use the keyword `class' or `typename'");
1666 aggr
= class_type_node
;
1669 return build_tree_list (aggr
, identifier
);
1672 /* Finish a template template parameter, specified as AGGR IDENTIFIER.
1673 Returns the parameter. */
1676 finish_template_template_parm (aggr
, identifier
)
1680 tree decl
= build_decl (TYPE_DECL
, identifier
, NULL_TREE
);
1681 tree tmpl
= build_lang_decl (TEMPLATE_DECL
, identifier
, NULL_TREE
);
1682 DECL_TEMPLATE_PARMS (tmpl
) = current_template_parms
;
1683 DECL_TEMPLATE_RESULT (tmpl
) = decl
;
1684 DECL_ARTIFICIAL (decl
) = 1;
1685 end_template_decl ();
1687 return finish_template_type_parm (aggr
, tmpl
);
1690 /* Finish a parameter list, indicated by PARMS. If ELLIPSIS is
1691 non-zero, the parameter list was terminated by a `...'. */
1694 finish_parmlist (parms
, ellipsis
)
1700 /* We mark the PARMS as a parmlist so that declarator processing can
1701 disambiguate certain constructs. */
1702 TREE_PARMLIST (parms
) = 1;
1703 /* We do not append void_list_node here, but leave it to grokparms
1705 PARMLIST_ELLIPSIS_P (parms
) = ellipsis
;
1710 /* Begin a class definition, as indicated by T. */
1713 begin_class_definition (t
)
1716 if (t
== error_mark_node
1717 || ! IS_AGGR_TYPE (t
))
1719 t
= make_aggr_type (RECORD_TYPE
);
1720 pushtag (make_anon_name (), t
, 0);
1723 /* In a definition of a member class template, we will get here with an
1724 implicit typename, a TYPENAME_TYPE with a type. */
1725 if (TREE_CODE (t
) == TYPENAME_TYPE
)
1728 /* If we generated a partial instantiation of this type, but now
1729 we're seeing a real definition, we're actually looking at a
1730 partial specialization. Consider:
1732 template <class T, class U>
1738 template <class T, class U>
1741 typename X<Y<T, U> >::A a;
1744 template <class T, class U>
1749 We have to undo the effects of the previous partial
1751 if (PARTIAL_INSTANTIATION_P (t
))
1755 /* Unfortunately, when we're not in pedantic mode, we
1756 attempt to actually fill in some of the fields of the
1757 partial instantiation, in order to support the implicit
1758 typename extension. Clear those fields now, in
1759 preparation for the definition here. The fields cleared
1760 here must match those set in instantiate_class_template.
1761 Look for a comment mentioning begin_class_definition
1763 TYPE_BINFO_BASETYPES (t
) = NULL_TREE
;
1764 TYPE_FIELDS (t
) = NULL_TREE
;
1765 TYPE_METHODS (t
) = NULL_TREE
;
1766 CLASSTYPE_TAGS (t
) = NULL_TREE
;
1767 CLASSTYPE_VBASECLASSES (t
) = NULL_TREE
;
1768 TYPE_SIZE (t
) = NULL_TREE
;
1771 /* This isn't a partial instantiation any more. */
1772 PARTIAL_INSTANTIATION_P (t
) = 0;
1774 /* If this type was already complete, and we see another definition,
1776 else if (COMPLETE_TYPE_P (t
))
1777 duplicate_tag_error (t
);
1779 /* Update the location of the decl. */
1780 DECL_SOURCE_FILE (TYPE_NAME (t
)) = input_filename
;
1781 DECL_SOURCE_LINE (TYPE_NAME (t
)) = lineno
;
1783 if (TYPE_BEING_DEFINED (t
))
1785 t
= make_aggr_type (TREE_CODE (t
));
1786 pushtag (TYPE_IDENTIFIER (t
), t
, 0);
1788 maybe_process_partial_specialization (t
);
1790 TYPE_BEING_DEFINED (t
) = 1;
1791 TYPE_PACKED (t
) = flag_pack_struct
;
1792 /* Reset the interface data, at the earliest possible
1793 moment, as it might have been set via a class foo;
1796 tree name
= TYPE_IDENTIFIER (t
);
1798 if (! ANON_AGGRNAME_P (name
))
1800 CLASSTYPE_INTERFACE_ONLY (t
) = interface_only
;
1801 SET_CLASSTYPE_INTERFACE_UNKNOWN_X
1802 (t
, interface_unknown
);
1805 /* Only leave this bit clear if we know this
1806 class is part of an interface-only specification. */
1807 if (! CLASSTYPE_INTERFACE_KNOWN (t
)
1808 || ! CLASSTYPE_INTERFACE_ONLY (t
))
1809 CLASSTYPE_VTABLE_NEEDS_WRITING (t
) = 1;
1811 reset_specialization();
1813 /* Make a declaration for this class in its own scope. */
1814 build_self_reference ();
1819 /* Finish the member declaration given by DECL. */
1822 finish_member_declaration (decl
)
1825 if (decl
== error_mark_node
|| decl
== NULL_TREE
)
1828 if (decl
== void_type_node
)
1829 /* The COMPONENT was a friend, not a member, and so there's
1830 nothing for us to do. */
1833 /* We should see only one DECL at a time. */
1834 my_friendly_assert (TREE_CHAIN (decl
) == NULL_TREE
, 0);
1836 /* Set up access control for DECL. */
1838 = (current_access_specifier
== access_private_node
);
1839 TREE_PROTECTED (decl
)
1840 = (current_access_specifier
== access_protected_node
);
1841 if (TREE_CODE (decl
) == TEMPLATE_DECL
)
1843 TREE_PRIVATE (DECL_TEMPLATE_RESULT (decl
)) = TREE_PRIVATE (decl
);
1844 TREE_PROTECTED (DECL_TEMPLATE_RESULT (decl
)) = TREE_PROTECTED (decl
);
1847 /* Mark the DECL as a member of the current class. */
1848 DECL_CONTEXT (decl
) = current_class_type
;
1852 A C language linkage is ignored for the names of class members
1853 and the member function type of class member functions. */
1854 if (DECL_LANG_SPECIFIC (decl
) && DECL_LANGUAGE (decl
) == lang_c
)
1855 DECL_LANGUAGE (decl
) = lang_cplusplus
;
1857 /* Put functions on the TYPE_METHODS list and everything else on the
1858 TYPE_FIELDS list. Note that these are built up in reverse order.
1859 We reverse them (to obtain declaration order) in finish_struct. */
1860 if (TREE_CODE (decl
) == FUNCTION_DECL
1861 || DECL_FUNCTION_TEMPLATE_P (decl
))
1863 /* We also need to add this function to the
1864 CLASSTYPE_METHOD_VEC. */
1865 add_method (current_class_type
, decl
, /*error_p=*/0);
1867 TREE_CHAIN (decl
) = TYPE_METHODS (current_class_type
);
1868 TYPE_METHODS (current_class_type
) = decl
;
1872 /* All TYPE_DECLs go at the end of TYPE_FIELDS. Ordinary fields
1873 go at the beginning. The reason is that lookup_field_1
1874 searches the list in order, and we want a field name to
1875 override a type name so that the "struct stat hack" will
1876 work. In particular:
1878 struct S { enum E { }; int E } s;
1881 is legal. In addition, the FIELD_DECLs must be maintained in
1882 declaration order so that class layout works as expected.
1883 However, we don't need that order until class layout, so we
1884 save a little time by putting FIELD_DECLs on in reverse order
1885 here, and then reversing them in finish_struct_1. (We could
1886 also keep a pointer to the correct insertion points in the
1889 if (TREE_CODE (decl
) == TYPE_DECL
)
1890 TYPE_FIELDS (current_class_type
)
1891 = chainon (TYPE_FIELDS (current_class_type
), decl
);
1894 TREE_CHAIN (decl
) = TYPE_FIELDS (current_class_type
);
1895 TYPE_FIELDS (current_class_type
) = decl
;
1898 /* Enter the DECL into the scope of the class. */
1899 if (TREE_CODE (decl
) != USING_DECL
)
1900 pushdecl_class_level (decl
);
1904 /* Finish a class definition T with the indicate ATTRIBUTES. If SEMI,
1905 the definition is immediately followed by a semicolon. Returns the
1909 finish_class_definition (t
, attributes
, semi
, pop_scope_p
)
1915 /* finish_struct nukes this anyway; if finish_exception does too,
1918 note_got_semicolon (t
);
1920 /* If we got any attributes in class_head, xref_tag will stick them in
1921 TREE_TYPE of the type. Grab them now. */
1922 attributes
= chainon (TREE_TYPE (t
), attributes
);
1923 TREE_TYPE (t
) = NULL_TREE
;
1925 if (TREE_CODE (t
) == ENUMERAL_TYPE
)
1929 t
= finish_struct (t
, attributes
);
1931 note_got_semicolon (t
);
1935 check_for_missing_semicolon (t
);
1937 pop_scope (CP_DECL_CONTEXT (TYPE_MAIN_DECL (t
)));
1938 if (current_scope () == current_function_decl
)
1939 do_pending_defargs ();
1944 /* Finish processing the default argument expressions cached during
1945 the processing of a class definition. */
1948 begin_inline_definitions ()
1950 if (current_scope () == current_function_decl
)
1951 do_pending_inlines ();
1954 /* Finish processing the inline function definitions cached during the
1955 processing of a class definition. */
1958 finish_inline_definitions ()
1960 if (current_class_type
== NULL_TREE
)
1961 clear_inline_text_obstack ();
1964 /* Finish processing the declaration of a member class template
1965 TYPES whose template parameters are given by PARMS. */
1968 finish_member_class_template (types
)
1973 /* If there are declared, but undefined, partial specializations
1974 mixed in with the typespecs they will not yet have passed through
1975 maybe_process_partial_specialization, so we do that here. */
1976 for (t
= types
; t
!= NULL_TREE
; t
= TREE_CHAIN (t
))
1977 if (IS_AGGR_TYPE_CODE (TREE_CODE (TREE_VALUE (t
))))
1978 maybe_process_partial_specialization (TREE_VALUE (t
));
1980 note_list_got_semicolon (types
);
1981 grok_x_components (types
);
1982 if (TYPE_CONTEXT (TREE_VALUE (types
)) != current_class_type
)
1983 /* The component was in fact a friend declaration. We avoid
1984 finish_member_template_decl performing certain checks by
1988 finish_member_template_decl (types
);
1990 /* As with other component type declarations, we do
1991 not store the new DECL on the list of
1996 /* Finish processsing a complete template declaration. The PARMS are
1997 the template parameters. */
2000 finish_template_decl (parms
)
2004 end_template_decl ();
2006 end_specialization ();
2009 /* Finish processing a template-id (which names a type) of the form
2010 NAME < ARGS >. Return the TYPE_DECL for the type named by the
2011 template-id. If ENTERING_SCOPE is non-zero we are about to enter
2012 the scope of template-id indicated. */
2015 finish_template_type (name
, args
, entering_scope
)
2022 decl
= lookup_template_class (name
, args
,
2023 NULL_TREE
, NULL_TREE
, entering_scope
);
2024 if (decl
!= error_mark_node
)
2025 decl
= TYPE_STUB_DECL (decl
);
2030 /* SR is a SCOPE_REF node. Enter the scope of SR, whether it is a
2031 namespace scope or a class scope. */
2037 tree scope
= TREE_OPERAND (sr
, 0);
2039 if (TREE_CODE (scope
) == NAMESPACE_DECL
)
2041 push_decl_namespace (scope
);
2042 TREE_COMPLEXITY (sr
) = -1;
2044 else if (scope
!= current_class_type
)
2046 if (TREE_CODE (scope
) == TYPENAME_TYPE
)
2048 /* In a declarator for a template class member, the scope will
2049 get here as an implicit typename, a TYPENAME_TYPE with a type. */
2050 scope
= TREE_TYPE (scope
);
2051 TREE_OPERAND (sr
, 0) = scope
;
2053 push_nested_class (scope
, 3);
2054 TREE_COMPLEXITY (sr
) = current_class_depth
;
2058 /* Finish processing a BASE_CLASS with the indicated ACCESS_SPECIFIER.
2059 Return a TREE_LIST containing the ACCESS_SPECIFIER and the
2060 BASE_CLASS, or NULL_TREE if an error occurred. The
2061 ACCESSS_SPECIFIER is one of
2062 access_{default,public,protected_private}[_virtual]_node.*/
2065 finish_base_specifier (access_specifier
, base_class
)
2066 tree access_specifier
;
2072 if (base_class
== NULL_TREE
)
2074 error ("invalid base class");
2075 type
= error_mark_node
;
2078 type
= TREE_TYPE (base_class
);
2080 if (! is_aggr_type (type
, 1))
2083 result
= build_tree_list (access_specifier
, type
);
2088 /* Called when multiple declarators are processed. If that is not
2089 premitted in this context, an error is issued. */
2092 check_multiple_declarators ()
2096 In a template-declaration, explicit specialization, or explicit
2097 instantiation the init-declarator-list in the declaration shall
2098 contain at most one declarator.
2100 We don't just use PROCESSING_TEMPLATE_DECL for the first
2101 condition since that would disallow the perfectly legal code,
2102 like `template <class T> struct S { int i, j; };'. */
2103 tree scope
= current_scope ();
2105 if (scope
&& TREE_CODE (scope
) == FUNCTION_DECL
)
2106 /* It's OK to write `template <class T> void f() { int i, j;}'. */
2109 if (PROCESSING_REAL_TEMPLATE_DECL_P ()
2110 || processing_explicit_instantiation
2111 || processing_specialization
)
2112 cp_error ("multiple declarators in template declaration");
2116 finish_typeof (expr
)
2119 if (processing_template_decl
)
2123 t
= make_aggr_type (TYPEOF_TYPE
);
2124 TYPE_FIELDS (t
) = expr
;
2129 return TREE_TYPE (expr
);
2132 /* Generate RTL for the statement T, and its substatements, and any
2133 other statements at its nesting level. */
2139 switch (TREE_CODE (t
))
2142 genrtl_decl_cleanup (CLEANUP_DECL (t
), CLEANUP_EXPR (t
));
2145 case START_CATCH_STMT
:
2146 genrtl_catch_block (TREE_TYPE (t
));
2150 genrtl_ctor_stmt (t
);
2154 genrtl_try_block (t
);
2162 genrtl_subobject (SUBOBJECT_CLEANUP (t
));
2166 genrtl_named_return_value ();
2170 my_friendly_abort (19990810);
2175 /* Called from expand_body via walk_tree. Replace all AGGR_INIT_EXPRs
2176 will equivalent CALL_EXPRs. */
2179 simplify_aggr_init_exprs_r (tp
, walk_subtrees
, data
)
2181 int *walk_subtrees ATTRIBUTE_UNUSED
;
2182 void *data ATTRIBUTE_UNUSED
;
2184 tree aggr_init_expr
;
2191 int copy_from_buffer_p
;
2193 aggr_init_expr
= *tp
;
2194 /* We don't need to walk into types; there's nothing in a type that
2195 needs simplification. (And, furthermore, there are places we
2196 actively don't want to go. For example, we don't want to wander
2197 into the default arguments for a FUNCTION_DECL that appears in a
2199 if (TYPE_P (aggr_init_expr
))
2204 /* Only AGGR_INIT_EXPRs are interesting. */
2205 else if (TREE_CODE (aggr_init_expr
) != AGGR_INIT_EXPR
)
2208 /* Form an appropriate CALL_EXPR. */
2209 fn
= TREE_OPERAND (aggr_init_expr
, 0);
2210 args
= TREE_OPERAND (aggr_init_expr
, 1);
2211 slot
= TREE_OPERAND (aggr_init_expr
, 2);
2212 type
= TREE_TYPE (aggr_init_expr
);
2214 if (AGGR_INIT_VIA_CTOR_P (aggr_init_expr
))
2216 /* Replace the first argument with the address of the third
2217 argument to the AGGR_INIT_EXPR. */
2218 call_type
= build_pointer_type (type
);
2219 mark_addressable (slot
);
2220 args
= tree_cons (NULL_TREE
, build1 (ADDR_EXPR
, call_type
, slot
),
2223 call_expr
= build (CALL_EXPR
, call_type
, fn
, args
, NULL_TREE
);
2224 TREE_SIDE_EFFECTS (call_expr
) = 1;
2226 /* If we're using the non-reentrant PCC calling convention, then we
2227 need to copy the returned value out of the static buffer into the
2229 copy_from_buffer_p
= 0;
2230 #ifdef PCC_STATIC_STRUCT_RETURN
2231 if (!AGGR_INIT_VIA_CTOR_P (aggr_init_expr
) && aggregate_value_p (type
))
2235 flag_access_control
= 0;
2236 call_expr
= build_aggr_init (slot
, call_expr
, LOOKUP_ONLYCONVERTING
);
2237 flag_access_control
= old_ac
;
2238 copy_from_buffer_p
= 1;
2242 /* If this AGGR_INIT_EXPR indicates the value returned by a
2243 function, then we want to use the value of the initialized
2244 location as the result. */
2245 if (AGGR_INIT_VIA_CTOR_P (aggr_init_expr
) || copy_from_buffer_p
)
2247 call_expr
= build (COMPOUND_EXPR
, type
,
2249 TREE_SIDE_EFFECTS (call_expr
) = 1;
2252 /* Replace the AGGR_INIT_EXPR with the CALL_EXPR. */
2253 TREE_CHAIN (call_expr
) = TREE_CHAIN (aggr_init_expr
);
2256 /* Keep iterating. */
2260 /* Emit all thunks to FN that should be emitted when FN is emitted. */
2263 emit_associated_thunks (fn
)
2266 /* When we use vcall offsets, we emit thunks with the virtual
2267 functions to which they thunk. The whole point of vcall offsets
2268 is so that you can know statically the entire set of thunks that
2269 will ever be needed for a given virtual function, thereby
2270 enabling you to output all the thunks with the function itself. */
2271 if (vcall_offsets_in_vtable_p () && DECL_VIRTUAL_P (fn
))
2276 for (binfo
= TYPE_BINFO (DECL_CONTEXT (fn
));
2278 binfo
= TREE_CHAIN (binfo
))
2279 for (v
= BINFO_VIRTUALS (binfo
); v
; v
= TREE_CHAIN (v
))
2281 && (!integer_zerop (BV_DELTA (v
))
2282 || BV_VCALL_INDEX (v
)))
2287 if (BV_USE_VCALL_INDEX_P (v
))
2289 vcall_index
= BV_VCALL_INDEX (v
);
2290 my_friendly_assert (vcall_index
!= NULL_TREE
, 20000621);
2293 vcall_index
= NULL_TREE
;
2295 thunk
= make_thunk (build1 (ADDR_EXPR
,
2296 vfunc_ptr_type_node
,
2300 /*generate_with_vtable_p=*/0);
2301 use_thunk (thunk
, /*emit_p=*/1);
2306 /* Generate RTL for FN. */
2313 const char *saved_input_filename
;
2315 /* When the parser calls us after finishing the body of a template
2316 function, we don't really want to expand the body. When we're
2317 processing an in-class definition of an inline function,
2318 PROCESSING_TEMPLATE_DECL will no longer be set here, so we have
2319 to look at the function itself. */
2320 if (processing_template_decl
2321 || (DECL_LANG_SPECIFIC (fn
)
2322 && DECL_TEMPLATE_INFO (fn
)
2323 && uses_template_parms (DECL_TI_ARGS (fn
))))
2325 /* Normally, collection only occurs in rest_of_compilation. So,
2326 if we don't collect here, we never collect junk generated
2327 during the processing of templates until we hit a
2328 non-template function. */
2333 /* Replace AGGR_INIT_EXPRs with appropriate CALL_EXPRs. */
2334 walk_tree_without_duplicates (&DECL_SAVED_TREE (fn
),
2335 simplify_aggr_init_exprs_r
,
2338 /* If this is a constructor or destructor body, we have to clone it
2339 under the new ABI. */
2340 if (maybe_clone_body (fn
))
2342 /* We don't want to process FN again, so pretend we've written
2343 it out, even though we haven't. */
2344 TREE_ASM_WRITTEN (fn
) = 1;
2348 /* There's no reason to do any of the work here if we're only doing
2349 semantic analysis; this code just generates RTL. */
2350 if (flag_syntax_only
)
2353 /* If possible, avoid generating RTL for this function. Instead,
2354 just record it as an inline function, and wait until end-of-file
2355 to decide whether to write it out or not. */
2356 if (/* We have to generate RTL if it's not an inline function. */
2357 (DECL_INLINE (fn
) || DECL_COMDAT (fn
))
2358 /* Or if we have to keep all inline functions anyhow. */
2359 && !flag_keep_inline_functions
2360 /* Or if we actually have a reference to the function. */
2361 && !DECL_NEEDED_P (fn
)
2362 /* Or if this is a nested function. */
2363 && !decl_function_context (fn
))
2365 /* Give the function RTL now so that we can assign it to a
2366 function pointer, etc. */
2367 make_function_rtl (fn
);
2368 /* Set DECL_EXTERNAL so that assemble_external will be called as
2369 necessary. We'll clear it again in finish_file. */
2370 if (!DECL_EXTERNAL (fn
))
2372 DECL_NOT_REALLY_EXTERN (fn
) = 1;
2373 DECL_EXTERNAL (fn
) = 1;
2375 /* Remember this function. In finish_file we'll decide if
2376 we actually need to write this function out. */
2378 /* Let the back-end know that this funtion exists. */
2379 note_deferral_of_defined_inline_function (fn
);
2383 /* Emit any thunks that should be emitted at the same time as FN. */
2384 emit_associated_thunks (fn
);
2386 timevar_push (TV_INTEGRATION
);
2388 /* Optimize the body of the function before expanding it. */
2389 optimize_function (fn
);
2391 timevar_pop (TV_INTEGRATION
);
2392 timevar_push (TV_EXPAND
);
2394 /* Save the current file name and line number. When we expand the
2395 body of the function, we'll set LINENO and INPUT_FILENAME so that
2396 error-mesages come out in the right places. */
2397 saved_lineno
= lineno
;
2398 saved_input_filename
= input_filename
;
2399 lineno
= DECL_SOURCE_LINE (fn
);
2400 input_filename
= DECL_SOURCE_FILE (fn
);
2402 genrtl_start_function (fn
);
2403 current_function_is_thunk
= DECL_THUNK_P (fn
);
2405 /* We don't need to redeclare __FUNCTION__, __PRETTY_FUNCTION__, or
2406 any of the other magic variables we set up when starting a
2408 function_name_declared_p
= 1;
2410 /* Expand the body. */
2411 expand_stmt (DECL_SAVED_TREE (fn
));
2413 /* Statements should always be full-expressions at the outermost set
2414 of curly braces for a function. */
2415 my_friendly_assert (stmts_are_full_exprs_p (), 19990831);
2417 /* The outermost statement for a function contains the line number
2418 recorded when we finished processing the function. */
2419 lineno
= STMT_LINENO (DECL_SAVED_TREE (fn
));
2421 /* Generate code for the function. */
2422 genrtl_finish_function (fn
);
2424 /* If possible, obliterate the body of the function so that it can
2425 be garbage collected. */
2426 if (flag_dump_translation_unit
)
2427 /* Keep the body; we're going to dump it. */
2429 else if (DECL_INLINE (fn
) && flag_inline_trees
)
2430 /* We might need the body of this function so that we can expand
2431 it inline somewhere else. */
2434 /* We don't need the body; blow it away. */
2435 DECL_SAVED_TREE (fn
) = NULL_TREE
;
2437 /* And restore the current source position. */
2438 lineno
= saved_lineno
;
2439 input_filename
= saved_input_filename
;
2440 extract_interface_info ();
2442 timevar_pop (TV_EXPAND
);
2445 /* Start generating the RTL for FN. */
2448 genrtl_start_function (fn
)
2453 /* Tell everybody what function we're processing. */
2454 current_function_decl
= fn
;
2455 /* Get the RTL machinery going for this function. */
2456 init_function_start (fn
, DECL_SOURCE_FILE (fn
), DECL_SOURCE_LINE (fn
));
2457 /* Let everybody know that we're expanding this function, not doing
2458 semantic analysis. */
2461 /* Even though we're inside a function body, we still don't want to
2462 call expand_expr to calculate the size of a variable-sized array.
2463 We haven't necessarily assigned RTL to all variables yet, so it's
2464 not safe to try to expand expressions involving them. */
2465 immediate_size_expand
= 0;
2466 cfun
->x_dont_save_pending_sizes_p
= 1;
2468 /* Let the user know we're compiling this function. */
2469 announce_function (fn
);
2471 /* Initialize the per-function data. */
2472 my_friendly_assert (!DECL_PENDING_INLINE_P (fn
), 20000911);
2473 if (DECL_SAVED_FUNCTION_DATA (fn
))
2475 /* If we already parsed this function, and we're just expanding it
2476 now, restore saved state. */
2477 *cp_function_chain
= *DECL_SAVED_FUNCTION_DATA (fn
);
2479 /* This function is being processed in whole-function mode; we
2480 already did semantic analysis. */
2481 cfun
->x_whole_function_mode_p
= 1;
2483 /* If we decided that we didn't want to inline this function,
2484 make sure the back-end knows that. */
2485 if (!current_function_cannot_inline
)
2486 current_function_cannot_inline
= cp_function_chain
->cannot_inline
;
2488 /* We don't need the saved data anymore. */
2489 free (DECL_SAVED_FUNCTION_DATA (fn
));
2490 DECL_SAVED_FUNCTION_DATA (fn
) = NULL
;
2493 /* Tell the cross-reference machinery that we're defining this
2495 GNU_xref_function (fn
, DECL_ARGUMENTS (fn
));
2497 /* Keep track of how many functions we're presently expanding. */
2500 /* Create a binding level for the parameters. */
2501 expand_start_bindings (2);
2502 /* Clear out any previously saved instructions for this function, in
2503 case it was defined more than once. */
2504 DECL_SAVED_INSNS (fn
) = NULL
;
2505 /* Go through the PARM_DECLs for this function to see if any need
2507 for (parm
= DECL_ARGUMENTS (fn
); parm
; parm
= TREE_CHAIN (parm
))
2508 if (TREE_TYPE (parm
) != error_mark_node
2509 && TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (parm
)))
2511 expand_function_start (fn
, /*parms_have_cleanups=*/1);
2515 expand_function_start (fn
, /*parms_have_cleanups=*/0);
2516 /* If this function is `main'. */
2517 if (DECL_MAIN_P (fn
))
2518 expand_main_function ();
2519 /* Create a binding contour which can be used to catch
2520 cleanup-generated temporaries. */
2521 expand_start_bindings (2);
2524 /* Finish generating the RTL for FN. */
2527 genrtl_finish_function (fn
)
2530 tree no_return_label
= NULL_TREE
;
2533 if (write_symbols
!= NO_DEBUG
)
2535 /* Keep this code around in case we later want to control debug info
2536 based on whether a type is "used". (jason 1999-11-11) */
2538 tree ttype
= target_type (fntype
);
2541 if (IS_AGGR_TYPE (ttype
))
2542 /* Let debugger know it should output info for this type. */
2543 note_debug_info_needed (ttype
);
2545 for (parmdecl
= DECL_ARGUMENTS (fndecl
); parmdecl
; parmdecl
= TREE_CHAIN (parmdecl
))
2547 ttype
= target_type (TREE_TYPE (parmdecl
));
2548 if (IS_AGGR_TYPE (ttype
))
2549 /* Let debugger know it should output info for this type. */
2550 note_debug_info_needed (ttype
);
2555 /* Clean house because we will need to reorder insns here. */
2556 do_pending_stack_adjust ();
2558 if (!dtor_label
&& !DECL_CONSTRUCTOR_P (fn
)
2559 && return_label
!= NULL_RTX
2560 && current_function_return_value
== NULL_TREE
2561 && ! DECL_NAME (DECL_RESULT (current_function_decl
)))
2562 no_return_label
= build_decl (LABEL_DECL
, NULL_TREE
, NULL_TREE
);
2564 if (flag_exceptions
)
2565 expand_exception_blocks ();
2567 /* If this function is supposed to return a value, ensure that
2568 we do not fall into the cleanups by mistake. The end of our
2569 function will look like this:
2571 user code (may have return stmt somewhere)
2572 goto no_return_label
2577 NOTE_INSN_FUNCTION_END
2581 If the user omits a return stmt in the USER CODE section, we
2582 will have a control path which reaches NOTE_INSN_FUNCTION_END.
2583 Otherwise, we won't. */
2584 if (no_return_label
)
2586 DECL_CONTEXT (no_return_label
) = fn
;
2587 DECL_INITIAL (no_return_label
) = error_mark_node
;
2588 DECL_SOURCE_FILE (no_return_label
) = input_filename
;
2589 DECL_SOURCE_LINE (no_return_label
) = lineno
;
2590 expand_goto (no_return_label
);
2595 /* Remove the binding contour which is used to catch
2596 cleanup-generated temporaries. */
2597 expand_end_bindings (0, 0, 0);
2600 /* Emit label at beginning of cleanup code for parameters. */
2601 emit_label (cleanup_label
);
2604 /* Finish building code that will trigger warnings if users forget
2605 to make their functions return values. */
2606 emit_jump (return_label
);
2607 if (no_return_label
)
2609 /* We don't need to call `expand_*_return' here because we don't
2610 need any cleanups here--this path of code is only for error
2611 checking purposes. */
2612 expand_label (no_return_label
);
2615 /* We hard-wired immediate_size_expand to zero in start_function.
2616 Expand_function_end will decrement this variable. So, we set the
2617 variable to one here, so that after the decrement it will remain
2619 immediate_size_expand
= 1;
2621 /* Generate rtl for function exit. */
2622 expand_function_end (input_filename
, lineno
, 1);
2624 /* If this is a nested function (like a template instantiation that
2625 we're compiling in the midst of compiling something else), push a
2626 new GC context. That will keep local variables on the stack from
2627 being collected while we're doing the compilation of this
2629 if (function_depth
> 1)
2630 ggc_push_context ();
2632 /* Run the optimizers and output the assembler code for this
2634 rest_of_compilation (fn
);
2636 /* Undo the call to ggc_push_context above. */
2637 if (function_depth
> 1)
2640 if (DECL_SAVED_INSNS (fn
) && ! TREE_ASM_WRITTEN (fn
))
2642 /* Set DECL_EXTERNAL so that assemble_external will be called as
2643 necessary. We'll clear it again in finish_file. */
2644 if (! DECL_EXTERNAL (fn
))
2645 DECL_NOT_REALLY_EXTERN (fn
) = 1;
2646 DECL_EXTERNAL (fn
) = 1;
2651 /* Keep this code around in case we later want to control debug info
2652 based on whether a type is "used". (jason 1999-11-11) */
2654 if (ctype
&& TREE_ASM_WRITTEN (fn
))
2655 note_debug_info_needed (ctype
);
2658 /* If this function is marked with the constructor attribute, add it
2659 to the list of functions to be called along with constructors
2660 from static duration objects. */
2661 if (DECL_STATIC_CONSTRUCTOR (fn
))
2662 static_ctors
= tree_cons (NULL_TREE
, fn
, static_ctors
);
2664 /* If this function is marked with the destructor attribute, add it
2665 to the list of functions to be called along with destructors from
2666 static duration objects. */
2667 if (DECL_STATIC_DESTRUCTOR (fn
))
2668 static_dtors
= tree_cons (NULL_TREE
, fn
, static_dtors
);
2672 if (!DECL_SAVED_INSNS (fn
)
2673 && !(flag_inline_trees
&& DECL_INLINE (fn
)))
2677 /* Stop pointing to the local nodes about to be freed. */
2678 /* But DECL_INITIAL must remain nonzero so we know this
2679 was an actual function definition. */
2680 DECL_INITIAL (fn
) = error_mark_node
;
2681 for (t
= DECL_ARGUMENTS (fn
); t
; t
= TREE_CHAIN (t
))
2682 DECL_RTL (t
) = DECL_INCOMING_RTL (t
) = NULL_RTX
;
2685 /* Let the error reporting routines know that we're outside a
2686 function. For a nested function, this value is used in
2687 pop_cp_function_context and then reset via pop_function_context. */
2688 current_function_decl
= NULL_TREE
;
2691 /* Perform initialization related to this module. */
2694 init_cp_semantics ()
2696 lang_expand_stmt
= cp_expand_stmt
;