1 /****************************************************************************
3 * GNAT COMPILER COMPONENTS *
7 * C Implementation File *
9 * Copyright (C) 1992-2005, Free Software Foundation, Inc. *
11 * GNAT is free software; you can redistribute it and/or modify it under *
12 * terms of the GNU General Public License as published by the Free Soft- *
13 * ware Foundation; either version 2, or (at your option) any later ver- *
14 * sion. GNAT is distributed in the hope that it will be useful, but WITH- *
15 * OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY *
16 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License *
17 * for more details. You should have received a copy of the GNU General *
18 * Public License distributed with GNAT; see file COPYING. If not, write *
19 * to the Free Software Foundation, 51 Franklin Street, Fifth Floor, *
20 * Boston, MA 02110-1301, USA. *
22 * GNAT was originally developed by the GNAT team at New York University. *
23 * Extensive contributions were provided by Ada Core Technologies Inc. *
25 ****************************************************************************/
29 #include "coretypes.h"
43 #include "tree-gimple.h"
62 struct Node
*Nodes_Ptr
;
63 Node_Id
*Next_Node_Ptr
;
64 Node_Id
*Prev_Node_Ptr
;
65 struct Elist_Header
*Elists_Ptr
;
66 struct Elmt_Item
*Elmts_Ptr
;
67 struct String_Entry
*Strings_Ptr
;
68 Char_Code
*String_Chars_Ptr
;
69 struct List_Header
*List_Headers_Ptr
;
71 /* Current filename without path. */
72 const char *ref_filename
;
74 /* If true, then gigi is being called on an analyzed but unexpanded
75 tree, and the only purpose of the call is to properly annotate
76 types with representation information. */
77 bool type_annotate_only
;
79 /* A structure used to gather together information about a statement group.
80 We use this to gather related statements, for example the "then" part
81 of a IF. In the case where it represents a lexical scope, we may also
82 have a BLOCK node corresponding to it and/or cleanups. */
84 struct stmt_group
GTY((chain_next ("%h.previous"))) {
85 struct stmt_group
*previous
; /* Previous code group. */
86 tree stmt_list
; /* List of statements for this code group. */
87 tree block
; /* BLOCK for this code group, if any. */
88 tree cleanups
; /* Cleanups for this code group, if any. */
91 static GTY(()) struct stmt_group
*current_stmt_group
;
93 /* List of unused struct stmt_group nodes. */
94 static GTY((deletable
)) struct stmt_group
*stmt_group_free_list
;
96 /* A structure used to record information on elaboration procedures
97 we've made and need to process.
99 ??? gnat_node should be Node_Id, but gengtype gets confused. */
101 struct elab_info
GTY((chain_next ("%h.next"))) {
102 struct elab_info
*next
; /* Pointer to next in chain. */
103 tree elab_proc
; /* Elaboration procedure. */
104 int gnat_node
; /* The N_Compilation_Unit. */
107 static GTY(()) struct elab_info
*elab_info_list
;
109 /* Free list of TREE_LIST nodes used for stacks. */
110 static GTY((deletable
)) tree gnu_stack_free_list
;
112 /* List of TREE_LIST nodes representing a stack of exception pointer
113 variables. TREE_VALUE is the VAR_DECL that stores the address of
114 the raised exception. Nonzero means we are in an exception
115 handler. Not used in the zero-cost case. */
116 static GTY(()) tree gnu_except_ptr_stack
;
118 /* List of TREE_LIST nodes used to store the current elaboration procedure
119 decl. TREE_VALUE is the decl. */
120 static GTY(()) tree gnu_elab_proc_stack
;
122 /* Variable that stores a list of labels to be used as a goto target instead of
123 a return in some functions. See processing for N_Subprogram_Body. */
124 static GTY(()) tree gnu_return_label_stack
;
126 /* List of TREE_LIST nodes representing a stack of LOOP_STMT nodes.
127 TREE_VALUE of each entry is the label of the corresponding LOOP_STMT. */
128 static GTY(()) tree gnu_loop_label_stack
;
130 /* List of TREE_LIST nodes representing labels for switch statements.
131 TREE_VALUE of each entry is the label at the end of the switch. */
132 static GTY(()) tree gnu_switch_label_stack
;
134 /* Map GNAT tree codes to GCC tree codes for simple expressions. */
135 static enum tree_code gnu_codes
[Number_Node_Kinds
];
137 /* Current node being treated, in case abort called. */
138 Node_Id error_gnat_node
;
140 static void Compilation_Unit_to_gnu (Node_Id
);
141 static void record_code_position (Node_Id
);
142 static void insert_code_for (Node_Id
);
143 static void start_stmt_group (void);
144 static void add_cleanup (tree
);
145 static tree
mark_visited (tree
*, int *, void *);
146 static tree
mark_unvisited (tree
*, int *, void *);
147 static tree
end_stmt_group (void);
148 static void add_stmt_list (List_Id
);
149 static tree
build_stmt_group (List_Id
, bool);
150 static void push_stack (tree
*, tree
, tree
);
151 static void pop_stack (tree
*);
152 static enum gimplify_status
gnat_gimplify_stmt (tree
*);
153 static void elaborate_all_entities (Node_Id
);
154 static void process_freeze_entity (Node_Id
);
155 static void process_inlined_subprograms (Node_Id
);
156 static void process_decls (List_Id
, List_Id
, Node_Id
, bool, bool);
157 static tree
emit_range_check (tree
, Node_Id
);
158 static tree
emit_index_check (tree
, tree
, tree
, tree
);
159 static tree
emit_check (tree
, tree
, int);
160 static tree
convert_with_check (Entity_Id
, tree
, bool, bool, bool);
161 static bool addressable_p (tree
);
162 static tree
assoc_to_constructor (Node_Id
, tree
);
163 static tree
extract_values (tree
, tree
);
164 static tree
pos_to_constructor (Node_Id
, tree
, Entity_Id
);
165 static tree
maybe_implicit_deref (tree
);
166 static tree
gnat_stabilize_reference_1 (tree
, bool);
167 static void annotate_with_node (tree
, Node_Id
);
168 static void build_global_cdtor (int, tree
*);
171 /* This is the main program of the back-end. It sets up all the table
172 structures and then generates code. */
175 gigi (Node_Id gnat_root
, int max_gnat_node
, int number_name
,
176 struct Node
*nodes_ptr
, Node_Id
*next_node_ptr
, Node_Id
*prev_node_ptr
,
177 struct Elist_Header
*elists_ptr
, struct Elmt_Item
*elmts_ptr
,
178 struct String_Entry
*strings_ptr
, Char_Code
*string_chars_ptr
,
179 struct List_Header
*list_headers_ptr
, Int number_units ATTRIBUTE_UNUSED
,
180 char *file_info_ptr ATTRIBUTE_UNUSED
, Entity_Id standard_integer
,
181 Entity_Id standard_long_long_float
, Entity_Id standard_exception_type
,
182 Int gigi_operating_mode
)
184 tree gnu_standard_long_long_float
;
185 tree gnu_standard_exception_type
;
186 struct elab_info
*info
;
188 max_gnat_nodes
= max_gnat_node
;
189 number_names
= number_name
;
190 Nodes_Ptr
= nodes_ptr
;
191 Next_Node_Ptr
= next_node_ptr
;
192 Prev_Node_Ptr
= prev_node_ptr
;
193 Elists_Ptr
= elists_ptr
;
194 Elmts_Ptr
= elmts_ptr
;
195 Strings_Ptr
= strings_ptr
;
196 String_Chars_Ptr
= string_chars_ptr
;
197 List_Headers_Ptr
= list_headers_ptr
;
199 type_annotate_only
= (gigi_operating_mode
== 1);
202 gnat_compute_largest_alignment ();
205 /* If we are just annotating types, give VOID_TYPE zero sizes to avoid
207 if (type_annotate_only
)
209 TYPE_SIZE (void_type_node
) = bitsize_zero_node
;
210 TYPE_SIZE_UNIT (void_type_node
) = size_zero_node
;
213 /* Save the type we made for integer as the type for Standard.Integer.
214 Then make the rest of the standard types. Note that some of these
216 save_gnu_tree (Base_Type (standard_integer
), TYPE_NAME (integer_type_node
),
219 gnu_except_ptr_stack
= tree_cons (NULL_TREE
, NULL_TREE
, NULL_TREE
);
221 gnu_standard_long_long_float
222 = gnat_to_gnu_entity (Base_Type (standard_long_long_float
), NULL_TREE
, 0);
223 gnu_standard_exception_type
224 = gnat_to_gnu_entity (Base_Type (standard_exception_type
), NULL_TREE
, 0);
226 init_gigi_decls (gnu_standard_long_long_float
, gnu_standard_exception_type
);
228 /* Process any Pragma Ident for the main unit. */
229 #ifdef ASM_OUTPUT_IDENT
230 if (Present (Ident_String (Main_Unit
)))
233 TREE_STRING_POINTER (gnat_to_gnu (Ident_String (Main_Unit
))));
236 /* If we are using the GCC exception mechanism, let GCC know. */
237 if (Exception_Mechanism
== GCC_ZCX
)
240 gcc_assert (Nkind (gnat_root
) == N_Compilation_Unit
);
241 Compilation_Unit_to_gnu (gnat_root
);
243 /* Now see if we have any elaboration procedures to deal with. */
244 for (info
= elab_info_list
; info
; info
= info
->next
)
246 tree gnu_body
= DECL_SAVED_TREE (info
->elab_proc
);
249 /* Mark everything we have as not visited. */
250 walk_tree_without_duplicates (&gnu_body
, mark_unvisited
, NULL
);
252 /* Set the current function to be the elaboration procedure and gimplify
254 current_function_decl
= info
->elab_proc
;
255 gimplify_body (&gnu_body
, info
->elab_proc
, true);
257 /* We should have a BIND_EXPR, but it may or may not have any statements
258 in it. If it doesn't have any, we have nothing to do. */
259 gnu_stmts
= gnu_body
;
260 if (TREE_CODE (gnu_stmts
) == BIND_EXPR
)
261 gnu_stmts
= BIND_EXPR_BODY (gnu_stmts
);
263 /* If there are no statements, there is no elaboration code. */
264 if (!gnu_stmts
|| !STATEMENT_LIST_HEAD (gnu_stmts
))
265 Set_Has_No_Elaboration_Code (info
->gnat_node
, 1);
268 /* Otherwise, compile the function. Note that we'll be gimplifying
269 it twice, but that's fine for the nodes we use. */
270 begin_subprog_body (info
->elab_proc
);
271 end_subprog_body (gnu_body
);
276 /* Perform initializations for this module. */
279 gnat_init_stmt_group ()
281 /* Initialize ourselves. */
285 /* Enable GNAT stack checking method if needed */
286 if (!Stack_Check_Probes_On_Target
)
287 set_stack_check_libfunc (gen_rtx_SYMBOL_REF (Pmode
, "_gnat_stack_check"));
289 gcc_assert (Exception_Mechanism
!= Front_End_ZCX
);
292 /* Subroutine of gnat_to_gnu to translate gnat_node, an N_Identifier,
293 to a GCC tree, which is returned. GNU_RESULT_TYPE_P is a pointer to
294 where we should place the result type. */
297 Identifier_to_gnu (Node_Id gnat_node
, tree
*gnu_result_type_p
)
299 tree gnu_result_type
;
301 Node_Id gnat_temp
, gnat_temp_type
;
303 /* If the Etype of this node does not equal the Etype of the Entity,
304 something is wrong with the entity map, probably in generic
305 instantiation. However, this does not apply to types. Since we sometime
306 have strange Ekind's, just do this test for objects. Also, if the Etype of
307 the Entity is private, the Etype of the N_Identifier is allowed to be the
308 full type and also we consider a packed array type to be the same as the
309 original type. Similarly, a class-wide type is equivalent to a subtype of
310 itself. Finally, if the types are Itypes, one may be a copy of the other,
311 which is also legal. */
312 gnat_temp
= (Nkind (gnat_node
) == N_Defining_Identifier
313 ? gnat_node
: Entity (gnat_node
));
314 gnat_temp_type
= Etype (gnat_temp
);
316 gcc_assert (Etype (gnat_node
) == gnat_temp_type
317 || (Is_Packed (gnat_temp_type
)
318 && Etype (gnat_node
) == Packed_Array_Type (gnat_temp_type
))
319 || (Is_Class_Wide_Type (Etype (gnat_node
)))
320 || (IN (Ekind (gnat_temp_type
), Private_Kind
)
321 && Present (Full_View (gnat_temp_type
))
322 && ((Etype (gnat_node
) == Full_View (gnat_temp_type
))
323 || (Is_Packed (Full_View (gnat_temp_type
))
324 && (Etype (gnat_node
)
325 == Packed_Array_Type (Full_View
326 (gnat_temp_type
))))))
327 || (Is_Itype (Etype (gnat_node
)) && Is_Itype (gnat_temp_type
))
328 || !(Ekind (gnat_temp
) == E_Variable
329 || Ekind (gnat_temp
) == E_Component
330 || Ekind (gnat_temp
) == E_Constant
331 || Ekind (gnat_temp
) == E_Loop_Parameter
332 || IN (Ekind (gnat_temp
), Formal_Kind
)));
334 /* If this is a reference to a deferred constant whose partial view is an
335 unconstrained private type, the proper type is on the full view of the
336 constant, not on the full view of the type, which may be unconstrained.
338 This may be a reference to a type, for example in the prefix of the
339 attribute Position, generated for dispatching code (see Make_DT in
340 exp_disp,adb). In that case we need the type itself, not is parent,
341 in particular if it is a derived type */
342 if (Is_Private_Type (gnat_temp_type
)
343 && Has_Unknown_Discriminants (gnat_temp_type
)
344 && Present (Full_View (gnat_temp
))
345 && !Is_Type (gnat_temp
))
347 gnat_temp
= Full_View (gnat_temp
);
348 gnat_temp_type
= Etype (gnat_temp
);
349 gnu_result_type
= get_unpadded_type (gnat_temp_type
);
353 /* Expand the type of this identifier first, in case it is an enumeral
354 literal, which only get made when the type is expanded. There is no
355 order-of-elaboration issue here. We want to use the Actual_Subtype if
356 it has already been elaborated, otherwise the Etype. Avoid using
357 Actual_Subtype for packed arrays to simplify things. */
358 if ((Ekind (gnat_temp
) == E_Constant
359 || Ekind (gnat_temp
) == E_Variable
|| Is_Formal (gnat_temp
))
360 && !(Is_Array_Type (Etype (gnat_temp
))
361 && Present (Packed_Array_Type (Etype (gnat_temp
))))
362 && Present (Actual_Subtype (gnat_temp
))
363 && present_gnu_tree (Actual_Subtype (gnat_temp
)))
364 gnat_temp_type
= Actual_Subtype (gnat_temp
);
366 gnat_temp_type
= Etype (gnat_node
);
368 gnu_result_type
= get_unpadded_type (gnat_temp_type
);
371 gnu_result
= gnat_to_gnu_entity (gnat_temp
, NULL_TREE
, 0);
373 /* If we are in an exception handler, force this variable into memory to
374 ensure optimization does not remove stores that appear redundant but are
375 actually needed in case an exception occurs.
377 ??? Note that we need not do this if the variable is declared within the
378 handler, only if it is referenced in the handler and declared in an
379 enclosing block, but we have no way of testing that right now.
381 ??? Also, for now all we can do is make it volatile. But we only
383 if (TREE_VALUE (gnu_except_ptr_stack
)
384 && TREE_CODE (gnu_result
) == VAR_DECL
)
385 TREE_THIS_VOLATILE (gnu_result
) = TREE_SIDE_EFFECTS (gnu_result
) = 1;
387 /* Some objects (such as parameters passed by reference, globals of
388 variable size, and renamed objects) actually represent the address
389 of the object. In that case, we must do the dereference. Likewise,
390 deal with parameters to foreign convention subprograms. Call fold
391 here since GNU_RESULT may be a CONST_DECL. */
392 if (DECL_P (gnu_result
)
393 && (DECL_BY_REF_P (gnu_result
)
394 || (TREE_CODE (gnu_result
) == PARM_DECL
395 && DECL_BY_COMPONENT_PTR_P (gnu_result
))))
397 bool ro
= DECL_POINTS_TO_READONLY_P (gnu_result
);
400 if (TREE_CODE (gnu_result
) == PARM_DECL
401 && DECL_BY_COMPONENT_PTR_P (gnu_result
))
403 = build_unary_op (INDIRECT_REF
, NULL_TREE
,
404 convert (build_pointer_type (gnu_result_type
),
407 /* If it's a renaming pointer and we are at the right binding level,
408 we can reference the renamed object directly, since the renamed
409 expression has been protected against multiple evaluations. */
410 else if (TREE_CODE (gnu_result
) == VAR_DECL
411 && (renamed_obj
= DECL_RENAMED_OBJECT (gnu_result
)) != 0
412 && (! DECL_RENAMING_GLOBAL_P (gnu_result
)
413 || global_bindings_p ())
414 /* Make sure it's an lvalue like INDIRECT_REF. */
415 && (DECL_P (renamed_obj
)
416 || REFERENCE_CLASS_P (renamed_obj
)
417 || (TREE_CODE (renamed_obj
) == VIEW_CONVERT_EXPR
418 && (DECL_P (TREE_OPERAND (renamed_obj
, 0))
419 || REFERENCE_CLASS_P (TREE_OPERAND (renamed_obj
,0))))))
420 gnu_result
= renamed_obj
;
422 gnu_result
= build_unary_op (INDIRECT_REF
, NULL_TREE
,
425 TREE_READONLY (gnu_result
) = TREE_STATIC (gnu_result
) = ro
;
428 /* The GNAT tree has the type of a function as the type of its result. Also
429 use the type of the result if the Etype is a subtype which is nominally
430 unconstrained. But remove any padding from the resulting type. */
431 if (TREE_CODE (TREE_TYPE (gnu_result
)) == FUNCTION_TYPE
432 || Is_Constr_Subt_For_UN_Aliased (gnat_temp_type
))
434 gnu_result_type
= TREE_TYPE (gnu_result
);
435 if (TREE_CODE (gnu_result_type
) == RECORD_TYPE
436 && TYPE_IS_PADDING_P (gnu_result_type
))
437 gnu_result_type
= TREE_TYPE (TYPE_FIELDS (gnu_result_type
));
440 /* We always want to return the underlying INTEGER_CST for an enumeration
441 literal to avoid the need to call fold in lots of places. But don't do
442 this is the parent will be taking the address of this object. */
443 if (TREE_CODE (gnu_result
) == CONST_DECL
)
445 gnat_temp
= Parent (gnat_node
);
446 if (!DECL_CONST_CORRESPONDING_VAR (gnu_result
)
447 || (Nkind (gnat_temp
) != N_Reference
448 && !(Nkind (gnat_temp
) == N_Attribute_Reference
449 && ((Get_Attribute_Id (Attribute_Name (gnat_temp
))
451 || (Get_Attribute_Id (Attribute_Name (gnat_temp
))
453 || (Get_Attribute_Id (Attribute_Name (gnat_temp
))
454 == Attr_Unchecked_Access
)
455 || (Get_Attribute_Id (Attribute_Name (gnat_temp
))
456 == Attr_Unrestricted_Access
)))))
457 gnu_result
= DECL_INITIAL (gnu_result
);
460 *gnu_result_type_p
= gnu_result_type
;
464 /* Subroutine of gnat_to_gnu to process gnat_node, an N_Pragma. Return
465 any statements we generate. */
468 Pragma_to_gnu (Node_Id gnat_node
)
471 tree gnu_result
= alloc_stmt_list ();
473 /* Check for (and ignore) unrecognized pragma and do nothing if we are just
475 if (type_annotate_only
|| !Is_Pragma_Name (Chars (gnat_node
)))
478 switch (Get_Pragma_Id (Chars (gnat_node
)))
480 case Pragma_Inspection_Point
:
481 /* Do nothing at top level: all such variables are already viewable. */
482 if (global_bindings_p ())
485 for (gnat_temp
= First (Pragma_Argument_Associations (gnat_node
));
487 gnat_temp
= Next (gnat_temp
))
489 tree gnu_expr
= gnat_to_gnu (Expression (gnat_temp
));
491 if (TREE_CODE (gnu_expr
) == UNCONSTRAINED_ARRAY_REF
)
492 gnu_expr
= TREE_OPERAND (gnu_expr
, 0);
494 gnu_expr
= build1 (USE_STMT
, void_type_node
, gnu_expr
);
495 annotate_with_node (gnu_expr
, gnat_node
);
496 append_to_statement_list (gnu_expr
, &gnu_result
);
500 case Pragma_Optimize
:
501 switch (Chars (Expression
502 (First (Pragma_Argument_Associations (gnat_node
)))))
504 case Name_Time
: case Name_Space
:
506 post_error ("insufficient -O value?", gnat_node
);
511 post_error ("must specify -O0?", gnat_node
);
519 case Pragma_Reviewable
:
520 if (write_symbols
== NO_DEBUG
)
521 post_error ("must specify -g?", gnat_node
);
527 /* Subroutine of gnat_to_gnu to translate gnat_node, an N_Attribute,
528 to a GCC tree, which is returned. GNU_RESULT_TYPE_P is a pointer to
529 where we should place the result type. ATTRIBUTE is the attribute ID. */
532 Attribute_to_gnu (Node_Id gnat_node
, tree
*gnu_result_type_p
, int attribute
)
534 tree gnu_result
= error_mark_node
;
535 tree gnu_result_type
;
537 bool prefix_unused
= false;
538 tree gnu_prefix
= gnat_to_gnu (Prefix (gnat_node
));
539 tree gnu_type
= TREE_TYPE (gnu_prefix
);
541 /* If the input is a NULL_EXPR, make a new one. */
542 if (TREE_CODE (gnu_prefix
) == NULL_EXPR
)
544 *gnu_result_type_p
= get_unpadded_type (Etype (gnat_node
));
545 return build1 (NULL_EXPR
, *gnu_result_type_p
,
546 TREE_OPERAND (gnu_prefix
, 0));
553 /* These are just conversions until since representation clauses for
554 enumerations are handled in the front end. */
556 bool checkp
= Do_Range_Check (First (Expressions (gnat_node
)));
558 gnu_result
= gnat_to_gnu (First (Expressions (gnat_node
)));
559 gnu_result_type
= get_unpadded_type (Etype (gnat_node
));
560 gnu_result
= convert_with_check (Etype (gnat_node
), gnu_result
,
561 checkp
, checkp
, true);
567 /* These just add or subject the constant 1. Representation clauses for
568 enumerations are handled in the front-end. */
569 gnu_expr
= gnat_to_gnu (First (Expressions (gnat_node
)));
570 gnu_result_type
= get_unpadded_type (Etype (gnat_node
));
572 if (Do_Range_Check (First (Expressions (gnat_node
))))
574 gnu_expr
= protect_multiple_eval (gnu_expr
);
577 (build_binary_op (EQ_EXPR
, integer_type_node
,
579 attribute
== Attr_Pred
580 ? TYPE_MIN_VALUE (gnu_result_type
)
581 : TYPE_MAX_VALUE (gnu_result_type
)),
582 gnu_expr
, CE_Range_Check_Failed
);
586 = build_binary_op (attribute
== Attr_Pred
587 ? MINUS_EXPR
: PLUS_EXPR
,
588 gnu_result_type
, gnu_expr
,
589 convert (gnu_result_type
, integer_one_node
));
593 case Attr_Unrestricted_Access
:
594 /* Conversions don't change something's address but can cause us to miss
595 the COMPONENT_REF case below, so strip them off. */
596 gnu_prefix
= remove_conversions (gnu_prefix
,
597 !Must_Be_Byte_Aligned (gnat_node
));
599 /* If we are taking 'Address of an unconstrained object, this is the
600 pointer to the underlying array. */
601 if (attribute
== Attr_Address
)
602 gnu_prefix
= maybe_unconstrained_array (gnu_prefix
);
604 /* ... fall through ... */
607 case Attr_Unchecked_Access
:
608 case Attr_Code_Address
:
609 gnu_result_type
= get_unpadded_type (Etype (gnat_node
));
611 = build_unary_op (((attribute
== Attr_Address
612 || attribute
== Attr_Unrestricted_Access
)
613 && !Must_Be_Byte_Aligned (gnat_node
))
614 ? ATTR_ADDR_EXPR
: ADDR_EXPR
,
615 gnu_result_type
, gnu_prefix
);
617 /* For 'Code_Address, find an inner ADDR_EXPR and mark it so that we
618 don't try to build a trampoline. */
619 if (attribute
== Attr_Code_Address
)
621 for (gnu_expr
= gnu_result
;
622 TREE_CODE (gnu_expr
) == NOP_EXPR
623 || TREE_CODE (gnu_expr
) == CONVERT_EXPR
;
624 gnu_expr
= TREE_OPERAND (gnu_expr
, 0))
625 TREE_CONSTANT (gnu_expr
) = 1;
627 if (TREE_CODE (gnu_expr
) == ADDR_EXPR
)
628 TREE_STATIC (gnu_expr
) = TREE_CONSTANT (gnu_expr
) = 1;
632 case Attr_Pool_Address
:
635 tree gnu_ptr
= gnu_prefix
;
637 gnu_result_type
= get_unpadded_type (Etype (gnat_node
));
639 /* If this is an unconstrained array, we know the object must have been
640 allocated with the template in front of the object. So compute the
642 if (TYPE_FAT_POINTER_P (TREE_TYPE (gnu_ptr
)))
644 = convert (build_pointer_type
645 (TYPE_OBJECT_RECORD_TYPE
646 (TYPE_UNCONSTRAINED_ARRAY (TREE_TYPE (gnu_ptr
)))),
649 gnu_obj_type
= TREE_TYPE (TREE_TYPE (gnu_ptr
));
650 if (TREE_CODE (gnu_obj_type
) == RECORD_TYPE
651 && TYPE_CONTAINS_TEMPLATE_P (gnu_obj_type
))
653 tree gnu_char_ptr_type
= build_pointer_type (char_type_node
);
654 tree gnu_pos
= byte_position (TYPE_FIELDS (gnu_obj_type
));
656 = convert (gnu_char_ptr_type
,
657 size_diffop (size_zero_node
, gnu_pos
));
659 gnu_ptr
= convert (gnu_char_ptr_type
, gnu_ptr
);
660 gnu_ptr
= build_binary_op (MINUS_EXPR
, gnu_char_ptr_type
,
661 gnu_ptr
, gnu_byte_offset
);
664 gnu_result
= convert (gnu_result_type
, gnu_ptr
);
669 case Attr_Object_Size
:
670 case Attr_Value_Size
:
671 case Attr_Max_Size_In_Storage_Elements
:
672 gnu_expr
= gnu_prefix
;
674 /* Remove NOPS from gnu_expr and conversions from gnu_prefix.
675 We only use GNU_EXPR to see if a COMPONENT_REF was involved. */
676 while (TREE_CODE (gnu_expr
) == NOP_EXPR
)
677 gnu_expr
= TREE_OPERAND (gnu_expr
, 0)
680 gnu_prefix
= remove_conversions (gnu_prefix
, true);
681 prefix_unused
= true;
682 gnu_type
= TREE_TYPE (gnu_prefix
);
684 /* Replace an unconstrained array type with the type of the underlying
685 array. We can't do this with a call to maybe_unconstrained_array
686 since we may have a TYPE_DECL. For 'Max_Size_In_Storage_Elements,
687 use the record type that will be used to allocate the object and its
689 if (TREE_CODE (gnu_type
) == UNCONSTRAINED_ARRAY_TYPE
)
691 gnu_type
= TYPE_OBJECT_RECORD_TYPE (gnu_type
);
692 if (attribute
!= Attr_Max_Size_In_Storage_Elements
)
693 gnu_type
= TREE_TYPE (TREE_CHAIN (TYPE_FIELDS (gnu_type
)));
696 /* If we're looking for the size of a field, return the field size.
697 Otherwise, if the prefix is an object, or if 'Object_Size or
698 'Max_Size_In_Storage_Elements has been specified, the result is the
699 GCC size of the type. Otherwise, the result is the RM_Size of the
701 if (TREE_CODE (gnu_prefix
) == COMPONENT_REF
)
702 gnu_result
= DECL_SIZE (TREE_OPERAND (gnu_prefix
, 1));
703 else if (TREE_CODE (gnu_prefix
) != TYPE_DECL
704 || attribute
== Attr_Object_Size
705 || attribute
== Attr_Max_Size_In_Storage_Elements
)
707 /* If this is a padded type, the GCC size isn't relevant to the
708 programmer. Normally, what we want is the RM_Size, which was set
709 from the specified size, but if it was not set, we want the size
710 of the relevant field. Using the MAX of those two produces the
711 right result in all case. Don't use the size of the field if it's
712 a self-referential type, since that's never what's wanted. */
713 if (TREE_CODE (gnu_type
) == RECORD_TYPE
714 && TYPE_IS_PADDING_P (gnu_type
)
715 && TREE_CODE (gnu_expr
) == COMPONENT_REF
)
717 gnu_result
= rm_size (gnu_type
);
718 if (!(CONTAINS_PLACEHOLDER_P
719 (DECL_SIZE (TREE_OPERAND (gnu_expr
, 1)))))
721 = size_binop (MAX_EXPR
, gnu_result
,
722 DECL_SIZE (TREE_OPERAND (gnu_expr
, 1)));
725 gnu_result
= TYPE_SIZE (gnu_type
);
728 gnu_result
= rm_size (gnu_type
);
730 gcc_assert (gnu_result
);
732 /* Deal with a self-referential size by returning the maximum size for a
733 type and by qualifying the size with the object for 'Size of an
735 if (CONTAINS_PLACEHOLDER_P (gnu_result
))
737 if (TREE_CODE (gnu_prefix
) != TYPE_DECL
)
738 gnu_result
= substitute_placeholder_in_expr (gnu_result
, gnu_expr
);
740 gnu_result
= max_size (gnu_result
, true);
743 /* If the type contains a template, subtract its size. */
744 if (TREE_CODE (gnu_type
) == RECORD_TYPE
745 && TYPE_CONTAINS_TEMPLATE_P (gnu_type
))
746 gnu_result
= size_binop (MINUS_EXPR
, gnu_result
,
747 DECL_SIZE (TYPE_FIELDS (gnu_type
)));
749 gnu_result_type
= get_unpadded_type (Etype (gnat_node
));
751 /* Always perform division using unsigned arithmetic as the size cannot
752 be negative, but may be an overflowed positive value. This provides
753 correct results for sizes up to 512 MB.
755 ??? Size should be calculated in storage elements directly. */
757 if (attribute
== Attr_Max_Size_In_Storage_Elements
)
758 gnu_result
= convert (sizetype
,
759 fold (build2 (CEIL_DIV_EXPR
, bitsizetype
,
760 gnu_result
, bitsize_unit_node
)));
764 if (TREE_CODE (gnu_prefix
) == COMPONENT_REF
765 && (TREE_CODE (TREE_TYPE (TREE_OPERAND (gnu_prefix
, 0)))
767 && (TYPE_IS_PADDING_P (TREE_TYPE (TREE_OPERAND (gnu_prefix
, 0)))))
768 gnu_prefix
= TREE_OPERAND (gnu_prefix
, 0);
770 gnu_type
= TREE_TYPE (gnu_prefix
);
771 gnu_result_type
= get_unpadded_type (Etype (gnat_node
));
772 prefix_unused
= true;
774 if (TREE_CODE (gnu_prefix
) == COMPONENT_REF
)
775 gnu_result
= size_int (DECL_ALIGN (TREE_OPERAND (gnu_prefix
, 1)));
777 gnu_result
= size_int (TYPE_ALIGN (gnu_type
) / BITS_PER_UNIT
);
782 case Attr_Range_Length
:
783 prefix_unused
= true;
785 if (INTEGRAL_TYPE_P (gnu_type
) || TREE_CODE (gnu_type
) == REAL_TYPE
)
787 gnu_result_type
= get_unpadded_type (Etype (gnat_node
));
789 if (attribute
== Attr_First
)
790 gnu_result
= TYPE_MIN_VALUE (gnu_type
);
791 else if (attribute
== Attr_Last
)
792 gnu_result
= TYPE_MAX_VALUE (gnu_type
);
796 (MAX_EXPR
, get_base_type (gnu_result_type
),
798 (PLUS_EXPR
, get_base_type (gnu_result_type
),
799 build_binary_op (MINUS_EXPR
,
800 get_base_type (gnu_result_type
),
801 convert (gnu_result_type
,
802 TYPE_MAX_VALUE (gnu_type
)),
803 convert (gnu_result_type
,
804 TYPE_MIN_VALUE (gnu_type
))),
805 convert (gnu_result_type
, integer_one_node
)),
806 convert (gnu_result_type
, integer_zero_node
));
811 /* ... fall through ... */
815 int Dimension
= (Present (Expressions (gnat_node
))
816 ? UI_To_Int (Intval (First (Expressions (gnat_node
))))
819 /* Make sure any implicit dereference gets done. */
820 gnu_prefix
= maybe_implicit_deref (gnu_prefix
);
821 gnu_prefix
= maybe_unconstrained_array (gnu_prefix
);
822 gnu_type
= TREE_TYPE (gnu_prefix
);
823 prefix_unused
= true;
824 gnu_result_type
= get_unpadded_type (Etype (gnat_node
));
826 if (TYPE_CONVENTION_FORTRAN_P (gnu_type
))
831 for (ndim
= 1, gnu_type_temp
= gnu_type
;
832 TREE_CODE (TREE_TYPE (gnu_type_temp
)) == ARRAY_TYPE
833 && TYPE_MULTI_ARRAY_P (TREE_TYPE (gnu_type_temp
));
834 ndim
++, gnu_type_temp
= TREE_TYPE (gnu_type_temp
))
837 Dimension
= ndim
+ 1 - Dimension
;
840 for (; Dimension
> 1; Dimension
--)
841 gnu_type
= TREE_TYPE (gnu_type
);
843 gcc_assert (TREE_CODE (gnu_type
) == ARRAY_TYPE
);
844 if (attribute
== Attr_First
)
846 = TYPE_MIN_VALUE (TYPE_INDEX_TYPE (TYPE_DOMAIN (gnu_type
)));
847 else if (attribute
== Attr_Last
)
849 = TYPE_MAX_VALUE (TYPE_INDEX_TYPE (TYPE_DOMAIN (gnu_type
)));
851 /* 'Length or 'Range_Length. */
853 tree gnu_compute_type
854 = gnat_signed_or_unsigned_type (0,
855 get_base_type (gnu_result_type
));
859 (MAX_EXPR
, gnu_compute_type
,
861 (PLUS_EXPR
, gnu_compute_type
,
863 (MINUS_EXPR
, gnu_compute_type
,
864 convert (gnu_compute_type
,
866 (TYPE_INDEX_TYPE (TYPE_DOMAIN (gnu_type
)))),
867 convert (gnu_compute_type
,
869 (TYPE_INDEX_TYPE (TYPE_DOMAIN (gnu_type
))))),
870 convert (gnu_compute_type
, integer_one_node
)),
871 convert (gnu_compute_type
, integer_zero_node
));
874 /* If this has a PLACEHOLDER_EXPR, qualify it by the object we are
875 handling. Note that these attributes could not have been used on
876 an unconstrained array type. */
877 gnu_result
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (gnu_result
,
882 case Attr_Bit_Position
:
888 HOST_WIDE_INT bitsize
;
889 HOST_WIDE_INT bitpos
;
891 tree gnu_field_bitpos
;
892 tree gnu_field_offset
;
894 enum machine_mode mode
;
895 int unsignedp
, volatilep
;
897 gnu_result_type
= get_unpadded_type (Etype (gnat_node
));
898 gnu_prefix
= remove_conversions (gnu_prefix
, true);
899 prefix_unused
= true;
901 /* We can have 'Bit on any object, but if it isn't a COMPONENT_REF,
902 the result is 0. Don't allow 'Bit on a bare component, though. */
903 if (attribute
== Attr_Bit
904 && TREE_CODE (gnu_prefix
) != COMPONENT_REF
905 && TREE_CODE (gnu_prefix
) != FIELD_DECL
)
907 gnu_result
= integer_zero_node
;
912 gcc_assert (TREE_CODE (gnu_prefix
) == COMPONENT_REF
913 || (attribute
== Attr_Bit_Position
914 && TREE_CODE (gnu_prefix
) == FIELD_DECL
));
916 get_inner_reference (gnu_prefix
, &bitsize
, &bitpos
, &gnu_offset
,
917 &mode
, &unsignedp
, &volatilep
, false);
919 if (TREE_CODE (gnu_prefix
) == COMPONENT_REF
)
921 gnu_field_bitpos
= bit_position (TREE_OPERAND (gnu_prefix
, 1));
922 gnu_field_offset
= byte_position (TREE_OPERAND (gnu_prefix
, 1));
924 for (gnu_inner
= TREE_OPERAND (gnu_prefix
, 0);
925 TREE_CODE (gnu_inner
) == COMPONENT_REF
926 && DECL_INTERNAL_P (TREE_OPERAND (gnu_inner
, 1));
927 gnu_inner
= TREE_OPERAND (gnu_inner
, 0))
930 = size_binop (PLUS_EXPR
, gnu_field_bitpos
,
931 bit_position (TREE_OPERAND (gnu_inner
, 1)));
933 = size_binop (PLUS_EXPR
, gnu_field_offset
,
934 byte_position (TREE_OPERAND (gnu_inner
, 1)));
937 else if (TREE_CODE (gnu_prefix
) == FIELD_DECL
)
939 gnu_field_bitpos
= bit_position (gnu_prefix
);
940 gnu_field_offset
= byte_position (gnu_prefix
);
944 gnu_field_bitpos
= bitsize_zero_node
;
945 gnu_field_offset
= size_zero_node
;
951 gnu_result
= gnu_field_offset
;
956 gnu_result
= size_int (bitpos
% BITS_PER_UNIT
);
960 gnu_result
= bitsize_int (bitpos
% BITS_PER_UNIT
);
961 gnu_result
= size_binop (PLUS_EXPR
, gnu_result
,
962 TYPE_SIZE (TREE_TYPE (gnu_prefix
)));
963 gnu_result
= size_binop (MINUS_EXPR
, gnu_result
,
967 case Attr_Bit_Position
:
968 gnu_result
= gnu_field_bitpos
;
972 /* If this has a PLACEHOLDER_EXPR, qualify it by the object
974 gnu_result
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (gnu_result
, gnu_prefix
);
981 tree gnu_lhs
= gnat_to_gnu (First (Expressions (gnat_node
)));
982 tree gnu_rhs
= gnat_to_gnu (Next (First (Expressions (gnat_node
))));
984 gnu_result_type
= get_unpadded_type (Etype (gnat_node
));
985 gnu_result
= build_binary_op (attribute
== Attr_Min
986 ? MIN_EXPR
: MAX_EXPR
,
987 gnu_result_type
, gnu_lhs
, gnu_rhs
);
991 case Attr_Passed_By_Reference
:
992 gnu_result
= size_int (default_pass_by_ref (gnu_type
)
993 || must_pass_by_ref (gnu_type
));
994 gnu_result_type
= get_unpadded_type (Etype (gnat_node
));
997 case Attr_Component_Size
:
998 if (TREE_CODE (gnu_prefix
) == COMPONENT_REF
999 && (TREE_CODE (TREE_TYPE (TREE_OPERAND (gnu_prefix
, 0)))
1001 && (TYPE_IS_PADDING_P (TREE_TYPE (TREE_OPERAND (gnu_prefix
, 0)))))
1002 gnu_prefix
= TREE_OPERAND (gnu_prefix
, 0);
1004 gnu_prefix
= maybe_implicit_deref (gnu_prefix
);
1005 gnu_type
= TREE_TYPE (gnu_prefix
);
1007 if (TREE_CODE (gnu_type
) == UNCONSTRAINED_ARRAY_TYPE
)
1008 gnu_type
= TREE_TYPE (TREE_TYPE (TYPE_FIELDS (TREE_TYPE (gnu_type
))));
1010 while (TREE_CODE (TREE_TYPE (gnu_type
)) == ARRAY_TYPE
1011 && TYPE_MULTI_ARRAY_P (TREE_TYPE (gnu_type
)))
1012 gnu_type
= TREE_TYPE (gnu_type
);
1014 gcc_assert (TREE_CODE (gnu_type
) == ARRAY_TYPE
);
1016 /* Note this size cannot be self-referential. */
1017 gnu_result
= TYPE_SIZE (TREE_TYPE (gnu_type
));
1018 gnu_result_type
= get_unpadded_type (Etype (gnat_node
));
1019 prefix_unused
= true;
1022 case Attr_Null_Parameter
:
1023 /* This is just a zero cast to the pointer type for
1024 our prefix and dereferenced. */
1025 gnu_result_type
= get_unpadded_type (Etype (gnat_node
));
1027 = build_unary_op (INDIRECT_REF
, NULL_TREE
,
1028 convert (build_pointer_type (gnu_result_type
),
1029 integer_zero_node
));
1030 TREE_PRIVATE (gnu_result
) = 1;
1033 case Attr_Mechanism_Code
:
1036 Entity_Id gnat_obj
= Entity (Prefix (gnat_node
));
1038 prefix_unused
= true;
1039 gnu_result_type
= get_unpadded_type (Etype (gnat_node
));
1040 if (Present (Expressions (gnat_node
)))
1042 int i
= UI_To_Int (Intval (First (Expressions (gnat_node
))));
1044 for (gnat_obj
= First_Formal (gnat_obj
); i
> 1;
1045 i
--, gnat_obj
= Next_Formal (gnat_obj
))
1049 code
= Mechanism (gnat_obj
);
1050 if (code
== Default
)
1051 code
= ((present_gnu_tree (gnat_obj
)
1052 && (DECL_BY_REF_P (get_gnu_tree (gnat_obj
))
1053 || ((TREE_CODE (get_gnu_tree (gnat_obj
))
1055 && (DECL_BY_COMPONENT_PTR_P
1056 (get_gnu_tree (gnat_obj
))))))
1057 ? By_Reference
: By_Copy
);
1058 gnu_result
= convert (gnu_result_type
, size_int (- code
));
1063 /* Say we have an unimplemented attribute. Then set the value to be
1064 returned to be a zero and hope that's something we can convert to the
1065 type of this attribute. */
1066 post_error ("unimplemented attribute", gnat_node
);
1067 gnu_result_type
= get_unpadded_type (Etype (gnat_node
));
1068 gnu_result
= integer_zero_node
;
1072 /* If this is an attribute where the prefix was unused, force a use of it if
1073 it has a side-effect. But don't do it if the prefix is just an entity
1074 name. However, if an access check is needed, we must do it. See second
1075 example in AARM 11.6(5.e). */
1076 if (prefix_unused
&& TREE_SIDE_EFFECTS (gnu_prefix
)
1077 && !Is_Entity_Name (Prefix (gnat_node
)))
1078 gnu_result
= fold (build2 (COMPOUND_EXPR
, TREE_TYPE (gnu_result
),
1079 gnu_prefix
, gnu_result
));
1081 *gnu_result_type_p
= gnu_result_type
;
1085 /* Subroutine of gnat_to_gnu to translate gnat_node, an N_Case_Statement,
1086 to a GCC tree, which is returned. */
1089 Case_Statement_to_gnu (Node_Id gnat_node
)
1095 gnu_expr
= gnat_to_gnu (Expression (gnat_node
));
1096 gnu_expr
= convert (get_base_type (TREE_TYPE (gnu_expr
)), gnu_expr
);
1098 /* The range of values in a case statement is determined by the rules in
1099 RM 5.4(7-9). In almost all cases, this range is represented by the Etype
1100 of the expression. One exception arises in the case of a simple name that
1101 is parenthesized. This still has the Etype of the name, but since it is
1102 not a name, para 7 does not apply, and we need to go to the base type.
1103 This is the only case where parenthesization affects the dynamic
1104 semantics (i.e. the range of possible values at runtime that is covered
1105 by the others alternative.
1107 Another exception is if the subtype of the expression is non-static. In
1108 that case, we also have to use the base type. */
1109 if (Paren_Count (Expression (gnat_node
)) != 0
1110 || !Is_OK_Static_Subtype (Underlying_Type
1111 (Etype (Expression (gnat_node
)))))
1112 gnu_expr
= convert (get_base_type (TREE_TYPE (gnu_expr
)), gnu_expr
);
1114 /* We build a SWITCH_EXPR that contains the code with interspersed
1115 CASE_LABEL_EXPRs for each label. */
1117 push_stack (&gnu_switch_label_stack
, NULL_TREE
, create_artificial_label ());
1118 start_stmt_group ();
1119 for (gnat_when
= First_Non_Pragma (Alternatives (gnat_node
));
1120 Present (gnat_when
);
1121 gnat_when
= Next_Non_Pragma (gnat_when
))
1123 Node_Id gnat_choice
;
1125 /* First compile all the different case choices for the current WHEN
1127 for (gnat_choice
= First (Discrete_Choices (gnat_when
));
1128 Present (gnat_choice
); gnat_choice
= Next (gnat_choice
))
1130 tree gnu_low
= NULL_TREE
, gnu_high
= NULL_TREE
;
1132 switch (Nkind (gnat_choice
))
1135 gnu_low
= gnat_to_gnu (Low_Bound (gnat_choice
));
1136 gnu_high
= gnat_to_gnu (High_Bound (gnat_choice
));
1139 case N_Subtype_Indication
:
1140 gnu_low
= gnat_to_gnu (Low_Bound (Range_Expression
1141 (Constraint (gnat_choice
))));
1142 gnu_high
= gnat_to_gnu (High_Bound (Range_Expression
1143 (Constraint (gnat_choice
))));
1147 case N_Expanded_Name
:
1148 /* This represents either a subtype range or a static value of
1149 some kind; Ekind says which. If a static value, fall through
1150 to the next case. */
1151 if (IN (Ekind (Entity (gnat_choice
)), Type_Kind
))
1153 tree gnu_type
= get_unpadded_type (Entity (gnat_choice
));
1155 gnu_low
= fold (TYPE_MIN_VALUE (gnu_type
));
1156 gnu_high
= fold (TYPE_MAX_VALUE (gnu_type
));
1160 /* ... fall through ... */
1162 case N_Character_Literal
:
1163 case N_Integer_Literal
:
1164 gnu_low
= gnat_to_gnu (gnat_choice
);
1167 case N_Others_Choice
:
1174 add_stmt_with_node (build3 (CASE_LABEL_EXPR
, void_type_node
,
1176 create_artificial_label ()),
1180 /* Push a binding level here in case variables are declared since we want
1181 them to be local to this set of statements instead of the block
1182 containing the Case statement. */
1183 add_stmt (build_stmt_group (Statements (gnat_when
), true));
1184 add_stmt (build1 (GOTO_EXPR
, void_type_node
,
1185 TREE_VALUE (gnu_switch_label_stack
)));
1188 /* Now emit a definition of the label all the cases branched to. */
1189 add_stmt (build1 (LABEL_EXPR
, void_type_node
,
1190 TREE_VALUE (gnu_switch_label_stack
)));
1191 gnu_result
= build3 (SWITCH_EXPR
, TREE_TYPE (gnu_expr
), gnu_expr
,
1192 end_stmt_group (), NULL_TREE
);
1193 pop_stack (&gnu_switch_label_stack
);
1198 /* Subroutine of gnat_to_gnu to translate gnat_node, an N_Loop_Statement,
1199 to a GCC tree, which is returned. */
1202 Loop_Statement_to_gnu (Node_Id gnat_node
)
1204 /* ??? It would be nice to use "build" here, but there's no build5. */
1205 tree gnu_loop_stmt
= build_nt (LOOP_STMT
, NULL_TREE
, NULL_TREE
,
1206 NULL_TREE
, NULL_TREE
, NULL_TREE
);
1207 tree gnu_loop_var
= NULL_TREE
;
1208 Node_Id gnat_iter_scheme
= Iteration_Scheme (gnat_node
);
1209 tree gnu_cond_expr
= NULL_TREE
;
1212 TREE_TYPE (gnu_loop_stmt
) = void_type_node
;
1213 TREE_SIDE_EFFECTS (gnu_loop_stmt
) = 1;
1214 LOOP_STMT_LABEL (gnu_loop_stmt
) = create_artificial_label ();
1215 annotate_with_node (gnu_loop_stmt
, gnat_node
);
1217 /* Save the end label of this LOOP_STMT in a stack so that the corresponding
1218 N_Exit_Statement can find it. */
1219 push_stack (&gnu_loop_label_stack
, NULL_TREE
,
1220 LOOP_STMT_LABEL (gnu_loop_stmt
));
1222 /* Set the condition that under which the loop should continue.
1223 For "LOOP .... END LOOP;" the condition is always true. */
1224 if (No (gnat_iter_scheme
))
1226 /* The case "WHILE condition LOOP ..... END LOOP;" */
1227 else if (Present (Condition (gnat_iter_scheme
)))
1228 LOOP_STMT_TOP_COND (gnu_loop_stmt
)
1229 = gnat_to_gnu (Condition (gnat_iter_scheme
));
1232 /* We have an iteration scheme. */
1233 Node_Id gnat_loop_spec
= Loop_Parameter_Specification (gnat_iter_scheme
);
1234 Entity_Id gnat_loop_var
= Defining_Entity (gnat_loop_spec
);
1235 Entity_Id gnat_type
= Etype (gnat_loop_var
);
1236 tree gnu_type
= get_unpadded_type (gnat_type
);
1237 tree gnu_low
= TYPE_MIN_VALUE (gnu_type
);
1238 tree gnu_high
= TYPE_MAX_VALUE (gnu_type
);
1239 bool reversep
= Reverse_Present (gnat_loop_spec
);
1240 tree gnu_first
= reversep
? gnu_high
: gnu_low
;
1241 tree gnu_last
= reversep
? gnu_low
: gnu_high
;
1242 enum tree_code end_code
= reversep
? GE_EXPR
: LE_EXPR
;
1243 tree gnu_base_type
= get_base_type (gnu_type
);
1244 tree gnu_limit
= (reversep
? TYPE_MIN_VALUE (gnu_base_type
)
1245 : TYPE_MAX_VALUE (gnu_base_type
));
1247 /* We know the loop variable will not overflow if GNU_LAST is a constant
1248 and is not equal to GNU_LIMIT. If it might overflow, we have to move
1249 the limit test to the end of the loop. In that case, we have to test
1250 for an empty loop outside the loop. */
1251 if (TREE_CODE (gnu_last
) != INTEGER_CST
1252 || TREE_CODE (gnu_limit
) != INTEGER_CST
1253 || tree_int_cst_equal (gnu_last
, gnu_limit
))
1256 = build3 (COND_EXPR
, void_type_node
,
1257 build_binary_op (LE_EXPR
, integer_type_node
,
1259 NULL_TREE
, alloc_stmt_list ());
1260 annotate_with_node (gnu_cond_expr
, gnat_loop_spec
);
1263 /* Open a new nesting level that will surround the loop to declare the
1264 loop index variable. */
1265 start_stmt_group ();
1268 /* Declare the loop index and set it to its initial value. */
1269 gnu_loop_var
= gnat_to_gnu_entity (gnat_loop_var
, gnu_first
, 1);
1270 if (DECL_BY_REF_P (gnu_loop_var
))
1271 gnu_loop_var
= build_unary_op (INDIRECT_REF
, NULL_TREE
, gnu_loop_var
);
1273 /* The loop variable might be a padded type, so use `convert' to get a
1274 reference to the inner variable if so. */
1275 gnu_loop_var
= convert (get_base_type (gnu_type
), gnu_loop_var
);
1277 /* Set either the top or bottom exit condition as appropriate depending
1278 on whether or not we know an overflow cannot occur. */
1280 LOOP_STMT_BOT_COND (gnu_loop_stmt
)
1281 = build_binary_op (NE_EXPR
, integer_type_node
,
1282 gnu_loop_var
, gnu_last
);
1284 LOOP_STMT_TOP_COND (gnu_loop_stmt
)
1285 = build_binary_op (end_code
, integer_type_node
,
1286 gnu_loop_var
, gnu_last
);
1288 LOOP_STMT_UPDATE (gnu_loop_stmt
)
1289 = build_binary_op (reversep
? PREDECREMENT_EXPR
1290 : PREINCREMENT_EXPR
,
1291 TREE_TYPE (gnu_loop_var
),
1293 convert (TREE_TYPE (gnu_loop_var
),
1295 annotate_with_node (LOOP_STMT_UPDATE (gnu_loop_stmt
),
1299 /* If the loop was named, have the name point to this loop. In this case,
1300 the association is not a ..._DECL node, but the end label from this
1302 if (Present (Identifier (gnat_node
)))
1303 save_gnu_tree (Entity (Identifier (gnat_node
)),
1304 LOOP_STMT_LABEL (gnu_loop_stmt
), true);
1306 /* Make the loop body into its own block, so any allocated storage will be
1307 released every iteration. This is needed for stack allocation. */
1308 LOOP_STMT_BODY (gnu_loop_stmt
)
1309 = build_stmt_group (Statements (gnat_node
), true);
1311 /* If we declared a variable, then we are in a statement group for that
1312 declaration. Add the LOOP_STMT to it and make that the "loop". */
1315 add_stmt (gnu_loop_stmt
);
1317 gnu_loop_stmt
= end_stmt_group ();
1320 /* If we have an outer COND_EXPR, that's our result and this loop is its
1321 "true" statement. Otherwise, the result is the LOOP_STMT. */
1324 COND_EXPR_THEN (gnu_cond_expr
) = gnu_loop_stmt
;
1325 gnu_result
= gnu_cond_expr
;
1326 recalculate_side_effects (gnu_cond_expr
);
1329 gnu_result
= gnu_loop_stmt
;
1331 pop_stack (&gnu_loop_label_stack
);
1336 /* Subroutine of gnat_to_gnu to process gnat_node, an N_Subprogram_Body. We
1337 don't return anything. */
1340 Subprogram_Body_to_gnu (Node_Id gnat_node
)
1342 /* Save debug output mode in case it is reset. */
1343 enum debug_info_type save_write_symbols
= write_symbols
;
1344 const struct gcc_debug_hooks
*const save_debug_hooks
= debug_hooks
;
1345 /* Defining identifier of a parameter to the subprogram. */
1346 Entity_Id gnat_param
;
1347 /* The defining identifier for the subprogram body. Note that if a
1348 specification has appeared before for this body, then the identifier
1349 occurring in that specification will also be a defining identifier and all
1350 the calls to this subprogram will point to that specification. */
1351 Entity_Id gnat_subprog_id
1352 = (Present (Corresponding_Spec (gnat_node
))
1353 ? Corresponding_Spec (gnat_node
) : Defining_Entity (gnat_node
));
1354 /* The FUNCTION_DECL node corresponding to the subprogram spec. */
1355 tree gnu_subprog_decl
;
1356 /* The FUNCTION_TYPE node corresponding to the subprogram spec. */
1357 tree gnu_subprog_type
;
1361 /* If this is a generic object or if it has been eliminated,
1363 if (Ekind (gnat_subprog_id
) == E_Generic_Procedure
1364 || Ekind (gnat_subprog_id
) == E_Generic_Function
1365 || Is_Eliminated (gnat_subprog_id
))
1368 /* If debug information is suppressed for the subprogram, turn debug
1369 mode off for the duration of processing. */
1370 if (!Needs_Debug_Info (gnat_subprog_id
))
1372 write_symbols
= NO_DEBUG
;
1373 debug_hooks
= &do_nothing_debug_hooks
;
1376 /* If this subprogram acts as its own spec, define it. Otherwise, just get
1377 the already-elaborated tree node. However, if this subprogram had its
1378 elaboration deferred, we will already have made a tree node for it. So
1379 treat it as not being defined in that case. Such a subprogram cannot
1380 have an address clause or a freeze node, so this test is safe, though it
1381 does disable some otherwise-useful error checking. */
1383 = gnat_to_gnu_entity (gnat_subprog_id
, NULL_TREE
,
1384 Acts_As_Spec (gnat_node
)
1385 && !present_gnu_tree (gnat_subprog_id
));
1387 gnu_subprog_type
= TREE_TYPE (gnu_subprog_decl
);
1389 /* Set the line number in the decl to correspond to that of the body so that
1390 the line number notes are written
1392 Sloc_to_locus (Sloc (gnat_node
), &DECL_SOURCE_LOCATION (gnu_subprog_decl
));
1394 begin_subprog_body (gnu_subprog_decl
);
1395 gnu_cico_list
= TYPE_CI_CO_LIST (gnu_subprog_type
);
1397 /* If there are OUT parameters, we need to ensure that the return statement
1398 properly copies them out. We do this by making a new block and converting
1399 any inner return into a goto to a label at the end of the block. */
1400 push_stack (&gnu_return_label_stack
, NULL_TREE
,
1401 gnu_cico_list
? create_artificial_label () : NULL_TREE
);
1403 /* Get a tree corresponding to the code for the subprogram. */
1404 start_stmt_group ();
1407 /* See if there are any parameters for which we don't yet have GCC entities.
1408 These must be for OUT parameters for which we will be making VAR_DECL
1409 nodes here. Fill them in to TYPE_CI_CO_LIST, which must contain the empty
1410 entry as well. We can match up the entries because TYPE_CI_CO_LIST is in
1411 the order of the parameters. */
1412 for (gnat_param
= First_Formal (gnat_subprog_id
);
1413 Present (gnat_param
);
1414 gnat_param
= Next_Formal_With_Extras (gnat_param
))
1415 if (!present_gnu_tree (gnat_param
))
1417 /* Skip any entries that have been already filled in; they must
1418 correspond to IN OUT parameters. */
1419 for (; gnu_cico_list
&& TREE_VALUE (gnu_cico_list
);
1420 gnu_cico_list
= TREE_CHAIN (gnu_cico_list
))
1423 /* Do any needed references for padded types. */
1424 TREE_VALUE (gnu_cico_list
)
1425 = convert (TREE_TYPE (TREE_PURPOSE (gnu_cico_list
)),
1426 gnat_to_gnu_entity (gnat_param
, NULL_TREE
, 1));
1429 process_decls (Declarations (gnat_node
), Empty
, Empty
, true, true);
1431 /* Generate the code of the subprogram itself. A return statement will be
1432 present and any OUT parameters will be handled there. */
1433 add_stmt (gnat_to_gnu (Handled_Statement_Sequence (gnat_node
)));
1435 gnu_result
= end_stmt_group ();
1437 /* If we made a special return label, we need to make a block that contains
1438 the definition of that label and the copying to the return value. That
1439 block first contains the function, then the label and copy statement. */
1440 if (TREE_VALUE (gnu_return_label_stack
))
1444 start_stmt_group ();
1446 add_stmt (gnu_result
);
1447 add_stmt (build1 (LABEL_EXPR
, void_type_node
,
1448 TREE_VALUE (gnu_return_label_stack
)));
1450 gnu_cico_list
= TYPE_CI_CO_LIST (gnu_subprog_type
);
1451 if (list_length (gnu_cico_list
) == 1)
1452 gnu_retval
= TREE_VALUE (gnu_cico_list
);
1454 gnu_retval
= gnat_build_constructor (TREE_TYPE (gnu_subprog_type
),
1457 if (DECL_P (gnu_retval
) && DECL_BY_REF_P (gnu_retval
))
1458 gnu_retval
= build_unary_op (INDIRECT_REF
, NULL_TREE
, gnu_retval
);
1461 (build1 (RETURN_EXPR
, void_type_node
,
1462 build2 (MODIFY_EXPR
, TREE_TYPE (gnu_retval
),
1463 DECL_RESULT (current_function_decl
), gnu_retval
)),
1466 gnu_result
= end_stmt_group ();
1469 pop_stack (&gnu_return_label_stack
);
1471 /* Initialize the information node for the function and set the
1473 allocate_struct_function (current_function_decl
);
1475 ((Present (End_Label (Handled_Statement_Sequence (gnat_node
)))
1476 ? Sloc (End_Label (Handled_Statement_Sequence (gnat_node
)))
1477 : Sloc (gnat_node
)),
1478 &cfun
->function_end_locus
);
1480 end_subprog_body (gnu_result
);
1482 /* Disconnect the trees for parameters that we made variables for from the
1483 GNAT entities since these are unusable after we end the function. */
1484 for (gnat_param
= First_Formal (gnat_subprog_id
);
1485 Present (gnat_param
);
1486 gnat_param
= Next_Formal_With_Extras (gnat_param
))
1487 if (TREE_CODE (get_gnu_tree (gnat_param
)) == VAR_DECL
)
1488 save_gnu_tree (gnat_param
, NULL_TREE
, false);
1490 mark_out_of_scope (Defining_Unit_Name (Specification (gnat_node
)));
1491 write_symbols
= save_write_symbols
;
1492 debug_hooks
= save_debug_hooks
;
1495 /* Subroutine of gnat_to_gnu to translate gnat_node, either an N_Function_Call
1496 or an N_Procedure_Call_Statement, to a GCC tree, which is returned.
1497 GNU_RESULT_TYPE_P is a pointer to where we should place the result type.
1498 If GNU_TARGET is non-null, this must be a function call and the result
1499 of the call is to be placed into that object. */
1502 call_to_gnu (Node_Id gnat_node
, tree
*gnu_result_type_p
, tree gnu_target
)
1505 /* The GCC node corresponding to the GNAT subprogram name. This can either
1506 be a FUNCTION_DECL node if we are dealing with a standard subprogram call,
1507 or an indirect reference expression (an INDIRECT_REF node) pointing to a
1509 tree gnu_subprog_node
= gnat_to_gnu (Name (gnat_node
));
1510 /* The FUNCTION_TYPE node giving the GCC type of the subprogram. */
1511 tree gnu_subprog_type
= TREE_TYPE (gnu_subprog_node
);
1512 tree gnu_subprog_addr
= build_unary_op (ADDR_EXPR
, NULL_TREE
,
1514 Entity_Id gnat_formal
;
1515 Node_Id gnat_actual
;
1516 tree gnu_actual_list
= NULL_TREE
;
1517 tree gnu_name_list
= NULL_TREE
;
1518 tree gnu_before_list
= NULL_TREE
;
1519 tree gnu_after_list
= NULL_TREE
;
1520 tree gnu_subprog_call
;
1522 switch (Nkind (Name (gnat_node
)))
1525 case N_Operator_Symbol
:
1526 case N_Expanded_Name
:
1527 case N_Attribute_Reference
:
1528 if (Is_Eliminated (Entity (Name (gnat_node
))))
1529 Eliminate_Error_Msg (gnat_node
, Entity (Name (gnat_node
)));
1532 gcc_assert (TREE_CODE (gnu_subprog_type
) == FUNCTION_TYPE
);
1534 /* If we are calling a stubbed function, make this into a raise of
1535 Program_Error. Elaborate all our args first. */
1536 if (TREE_CODE (gnu_subprog_node
) == FUNCTION_DECL
1537 && DECL_STUBBED_P (gnu_subprog_node
))
1539 for (gnat_actual
= First_Actual (gnat_node
);
1540 Present (gnat_actual
);
1541 gnat_actual
= Next_Actual (gnat_actual
))
1542 add_stmt (gnat_to_gnu (gnat_actual
));
1544 if (Nkind (gnat_node
) == N_Function_Call
&& !gnu_target
)
1546 *gnu_result_type_p
= TREE_TYPE (gnu_subprog_type
);
1547 return build1 (NULL_EXPR
, *gnu_result_type_p
,
1548 build_call_raise (PE_Stubbed_Subprogram_Called
));
1551 return build_call_raise (PE_Stubbed_Subprogram_Called
);
1554 /* If we are calling by supplying a pointer to a target, set up that
1555 pointer as the first argument. Use GNU_TARGET if one was passed;
1556 otherwise, make a target by building a variable of the maximum size
1558 if (TYPE_RETURNS_BY_TARGET_PTR_P (gnu_subprog_type
))
1560 tree gnu_real_ret_type
1561 = TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (gnu_subprog_type
)));
1566 = maybe_pad_type (gnu_real_ret_type
,
1567 max_size (TYPE_SIZE (gnu_real_ret_type
), true),
1568 0, Etype (Name (gnat_node
)), "PAD", false,
1571 gnu_target
= create_tmp_var_raw (gnu_obj_type
, "LR");
1572 gnat_pushdecl (gnu_target
, gnat_node
);
1576 = tree_cons (NULL_TREE
,
1577 build_unary_op (ADDR_EXPR
, NULL_TREE
,
1578 unchecked_convert (gnu_real_ret_type
,
1585 /* The only way we can be making a call via an access type is if Name is an
1586 explicit dereference. In that case, get the list of formal args from the
1587 type the access type is pointing to. Otherwise, get the formals from
1588 entity being called. */
1589 if (Nkind (Name (gnat_node
)) == N_Explicit_Dereference
)
1590 gnat_formal
= First_Formal (Etype (Name (gnat_node
)));
1591 else if (Nkind (Name (gnat_node
)) == N_Attribute_Reference
)
1592 /* Assume here that this must be 'Elab_Body or 'Elab_Spec. */
1595 gnat_formal
= First_Formal (Entity (Name (gnat_node
)));
1597 /* Create the list of the actual parameters as GCC expects it, namely a chain
1598 of TREE_LIST nodes in which the TREE_VALUE field of each node is a
1599 parameter-expression and the TREE_PURPOSE field is null. Skip OUT
1600 parameters not passed by reference and don't need to be copied in. */
1601 for (gnat_actual
= First_Actual (gnat_node
);
1602 Present (gnat_actual
);
1603 gnat_formal
= Next_Formal_With_Extras (gnat_formal
),
1604 gnat_actual
= Next_Actual (gnat_actual
))
1607 = (present_gnu_tree (gnat_formal
)
1608 ? get_gnu_tree (gnat_formal
) : NULL_TREE
);
1609 /* We treat a conversion between aggregate types as if it is an
1610 unchecked conversion. */
1611 bool unchecked_convert_p
1612 = (Nkind (gnat_actual
) == N_Unchecked_Type_Conversion
1613 || (Nkind (gnat_actual
) == N_Type_Conversion
1614 && Is_Composite_Type (Underlying_Type (Etype (gnat_formal
)))));
1615 Node_Id gnat_name
= (unchecked_convert_p
1616 ? Expression (gnat_actual
) : gnat_actual
);
1617 tree gnu_name
= gnat_to_gnu (gnat_name
);
1618 tree gnu_name_type
= gnat_to_gnu_type (Etype (gnat_name
));
1620 tree gnu_formal_type
;
1622 /* If it's possible we may need to use this expression twice, make sure
1623 than any side-effects are handled via SAVE_EXPRs. Likewise if we need
1624 to force side-effects before the call.
1626 ??? This is more conservative than we need since we don't need to do
1627 this for pass-by-ref with no conversion. If we are passing a
1628 non-addressable Out or In Out parameter by reference, pass the address
1629 of a copy and set up to copy back out after the call. */
1630 if (Ekind (gnat_formal
) != E_In_Parameter
)
1632 gnu_name
= gnat_stabilize_reference (gnu_name
, true);
1633 if (!addressable_p (gnu_name
)
1635 && (DECL_BY_REF_P (gnu_formal
)
1636 || (TREE_CODE (gnu_formal
) == PARM_DECL
1637 && (DECL_BY_COMPONENT_PTR_P (gnu_formal
)
1638 || (DECL_BY_DESCRIPTOR_P (gnu_formal
))))))
1640 tree gnu_copy
= gnu_name
;
1643 /* For users of Starlet we issue a warning because the
1644 interface apparently assumes that by-ref parameters
1645 outlive the procedure invocation. The code still
1646 will not work as intended, but we cannot do much
1647 better since other low-level parts of the back-end
1648 would allocate temporaries at will because of the
1649 misalignment if we did not do so here. */
1651 if (Is_Valued_Procedure (Entity (Name (gnat_node
))))
1654 ("?possible violation of implicit assumption",
1657 ("?made by pragma Import_Valued_Procedure on &",
1658 gnat_actual
, Entity (Name (gnat_node
)));
1660 ("?because of misalignment of &",
1661 gnat_actual
, gnat_formal
);
1664 /* Remove any unpadding on the actual and make a copy. But if
1665 the actual is a justified modular type, first convert
1667 if (TREE_CODE (gnu_name
) == COMPONENT_REF
1668 && ((TREE_CODE (TREE_TYPE (TREE_OPERAND (gnu_name
, 0)))
1670 && (TYPE_IS_PADDING_P
1671 (TREE_TYPE (TREE_OPERAND (gnu_name
, 0))))))
1672 gnu_name
= gnu_copy
= TREE_OPERAND (gnu_name
, 0);
1673 else if (TREE_CODE (gnu_name_type
) == RECORD_TYPE
1674 && (TYPE_JUSTIFIED_MODULAR_P (gnu_name_type
)))
1675 gnu_name
= convert (gnu_name_type
, gnu_name
);
1677 gnu_actual
= save_expr (gnu_name
);
1679 /* Since we're going to take the address of the SAVE_EXPR, we
1680 don't want it to be marked as unchanging. So set
1681 TREE_ADDRESSABLE. */
1682 gnu_temp
= skip_simple_arithmetic (gnu_actual
);
1683 if (TREE_CODE (gnu_temp
) == SAVE_EXPR
)
1685 TREE_ADDRESSABLE (gnu_temp
) = 1;
1686 TREE_READONLY (gnu_temp
) = 0;
1689 /* Set up to move the copy back to the original. */
1690 gnu_temp
= build2 (MODIFY_EXPR
, TREE_TYPE (gnu_copy
),
1691 gnu_copy
, gnu_actual
);
1692 annotate_with_node (gnu_temp
, gnat_actual
);
1693 append_to_statement_list (gnu_temp
, &gnu_after_list
);
1697 /* If this was a procedure call, we may not have removed any padding.
1698 So do it here for the part we will use as an input, if any. */
1699 gnu_actual
= gnu_name
;
1700 if (Ekind (gnat_formal
) != E_Out_Parameter
1701 && TREE_CODE (TREE_TYPE (gnu_actual
)) == RECORD_TYPE
1702 && TYPE_IS_PADDING_P (TREE_TYPE (gnu_actual
)))
1703 gnu_actual
= convert (get_unpadded_type (Etype (gnat_actual
)),
1706 /* Unless this is an In parameter, we must remove any LJM building
1708 if (Ekind (gnat_formal
) != E_In_Parameter
1709 && TREE_CODE (gnu_name
) == CONSTRUCTOR
1710 && TREE_CODE (TREE_TYPE (gnu_name
)) == RECORD_TYPE
1711 && TYPE_JUSTIFIED_MODULAR_P (TREE_TYPE (gnu_name
)))
1712 gnu_name
= convert (TREE_TYPE (TYPE_FIELDS (TREE_TYPE (gnu_name
))),
1715 if (Ekind (gnat_formal
) != E_Out_Parameter
1716 && !unchecked_convert_p
1717 && Do_Range_Check (gnat_actual
))
1718 gnu_actual
= emit_range_check (gnu_actual
, Etype (gnat_formal
));
1720 /* Do any needed conversions. We need only check for unchecked
1721 conversion since normal conversions will be handled by just
1722 converting to the formal type. */
1723 if (unchecked_convert_p
)
1726 = unchecked_convert (gnat_to_gnu_type (Etype (gnat_actual
)),
1728 (Nkind (gnat_actual
)
1729 == N_Unchecked_Type_Conversion
)
1730 && No_Truncation (gnat_actual
));
1732 /* One we've done the unchecked conversion, we still must ensure that
1733 the object is in range of the formal's type. */
1734 if (Ekind (gnat_formal
) != E_Out_Parameter
1735 && Do_Range_Check (gnat_actual
))
1736 gnu_actual
= emit_range_check (gnu_actual
,
1737 Etype (gnat_formal
));
1739 else if (TREE_CODE (gnu_actual
) != SAVE_EXPR
)
1740 /* We may have suppressed a conversion to the Etype of the actual since
1741 the parent is a procedure call. So add the conversion here. */
1742 gnu_actual
= convert (gnat_to_gnu_type (Etype (gnat_actual
)),
1745 /* If we have not saved a GCC object for the formal, it means it is an
1746 OUT parameter not passed by reference and that does not need to be
1747 copied in. Otherwise, look at the PARM_DECL to see if it is passed by
1750 && TREE_CODE (gnu_formal
) == PARM_DECL
&& DECL_BY_REF_P (gnu_formal
))
1752 if (Ekind (gnat_formal
) != E_In_Parameter
)
1754 gnu_actual
= gnu_name
;
1756 /* If we have a padded type, be sure we've removed padding. */
1757 if (TREE_CODE (TREE_TYPE (gnu_actual
)) == RECORD_TYPE
1758 && TYPE_IS_PADDING_P (TREE_TYPE (gnu_actual
))
1759 && TREE_CODE (gnu_actual
) != SAVE_EXPR
)
1760 gnu_actual
= convert (get_unpadded_type (Etype (gnat_actual
)),
1763 /* If we have the constructed subtype of an aliased object
1764 with an unconstrained nominal subtype, the type of the
1765 actual includes the template, although it is formally
1766 constrained. So we need to convert it back to the real
1767 constructed subtype to retrieve the constrained part
1768 and takes its address. */
1769 if (TREE_CODE (TREE_TYPE (gnu_actual
)) == RECORD_TYPE
1770 && TYPE_CONTAINS_TEMPLATE_P (TREE_TYPE (gnu_actual
))
1771 && TREE_CODE (gnu_actual
) != SAVE_EXPR
1772 && Is_Constr_Subt_For_UN_Aliased (Etype (gnat_actual
))
1773 && Is_Array_Type (Etype (gnat_actual
)))
1774 gnu_actual
= convert (gnat_to_gnu_type (Etype (gnat_actual
)),
1778 /* Otherwise, if we have a non-addressable COMPONENT_REF of a
1779 variable-size type see if it's doing a unpadding operation. If
1780 so, remove that operation since we have no way of allocating the
1781 required temporary. */
1782 if (TREE_CODE (gnu_actual
) == COMPONENT_REF
1783 && !TREE_CONSTANT (TYPE_SIZE (TREE_TYPE (gnu_actual
)))
1784 && (TREE_CODE (TREE_TYPE (TREE_OPERAND (gnu_actual
, 0)))
1786 && TYPE_IS_PADDING_P (TREE_TYPE
1787 (TREE_OPERAND (gnu_actual
, 0)))
1788 && !addressable_p (gnu_actual
))
1789 gnu_actual
= TREE_OPERAND (gnu_actual
, 0);
1791 /* The symmetry of the paths to the type of an entity is broken here
1792 since arguments don't know that they will be passed by ref. */
1793 gnu_formal_type
= TREE_TYPE (get_gnu_tree (gnat_formal
));
1794 gnu_actual
= build_unary_op (ADDR_EXPR
, gnu_formal_type
, gnu_actual
);
1796 else if (gnu_formal
&& TREE_CODE (gnu_formal
) == PARM_DECL
1797 && DECL_BY_COMPONENT_PTR_P (gnu_formal
))
1799 gnu_formal_type
= TREE_TYPE (get_gnu_tree (gnat_formal
));
1800 gnu_actual
= maybe_implicit_deref (gnu_actual
);
1801 gnu_actual
= maybe_unconstrained_array (gnu_actual
);
1803 if (TREE_CODE (gnu_formal_type
) == RECORD_TYPE
1804 && TYPE_IS_PADDING_P (gnu_formal_type
))
1806 gnu_formal_type
= TREE_TYPE (TYPE_FIELDS (gnu_formal_type
));
1807 gnu_actual
= convert (gnu_formal_type
, gnu_actual
);
1810 /* Take the address of the object and convert to the proper pointer
1811 type. We'd like to actually compute the address of the beginning
1812 of the array using an ADDR_EXPR of an ARRAY_REF, but there's a
1813 possibility that the ARRAY_REF might return a constant and we'd be
1814 getting the wrong address. Neither approach is exactly correct,
1815 but this is the most likely to work in all cases. */
1816 gnu_actual
= convert (gnu_formal_type
,
1817 build_unary_op (ADDR_EXPR
, NULL_TREE
,
1820 else if (gnu_formal
&& TREE_CODE (gnu_formal
) == PARM_DECL
1821 && DECL_BY_DESCRIPTOR_P (gnu_formal
))
1823 /* If arg is 'Null_Parameter, pass zero descriptor. */
1824 if ((TREE_CODE (gnu_actual
) == INDIRECT_REF
1825 || TREE_CODE (gnu_actual
) == UNCONSTRAINED_ARRAY_REF
)
1826 && TREE_PRIVATE (gnu_actual
))
1827 gnu_actual
= convert (DECL_ARG_TYPE (get_gnu_tree (gnat_formal
)),
1830 gnu_actual
= build_unary_op (ADDR_EXPR
, NULL_TREE
,
1831 fill_vms_descriptor (gnu_actual
,
1836 tree gnu_actual_size
= TYPE_SIZE (TREE_TYPE (gnu_actual
));
1838 if (Ekind (gnat_formal
) != E_In_Parameter
)
1839 gnu_name_list
= tree_cons (NULL_TREE
, gnu_name
, gnu_name_list
);
1841 if (!gnu_formal
|| TREE_CODE (gnu_formal
) != PARM_DECL
)
1844 /* If this is 'Null_Parameter, pass a zero even though we are
1845 dereferencing it. */
1846 else if (TREE_CODE (gnu_actual
) == INDIRECT_REF
1847 && TREE_PRIVATE (gnu_actual
)
1848 && host_integerp (gnu_actual_size
, 1)
1849 && 0 >= compare_tree_int (gnu_actual_size
,
1852 = unchecked_convert (DECL_ARG_TYPE (gnu_formal
),
1853 convert (gnat_type_for_size
1854 (tree_low_cst (gnu_actual_size
, 1),
1859 gnu_actual
= convert (DECL_ARG_TYPE (gnu_formal
), gnu_actual
);
1862 gnu_actual_list
= tree_cons (NULL_TREE
, gnu_actual
, gnu_actual_list
);
1865 gnu_subprog_call
= build3 (CALL_EXPR
, TREE_TYPE (gnu_subprog_type
),
1866 gnu_subprog_addr
, nreverse (gnu_actual_list
),
1869 /* If we return by passing a target, we emit the call and return the target
1871 if (TYPE_RETURNS_BY_TARGET_PTR_P (gnu_subprog_type
))
1873 add_stmt_with_node (gnu_subprog_call
, gnat_node
);
1875 = TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (gnu_subprog_type
)));
1876 return unchecked_convert (*gnu_result_type_p
, gnu_target
, false);
1879 /* If it is a function call, the result is the call expression unless
1880 a target is specified, in which case we copy the result into the target
1881 and return the assignment statement. */
1882 else if (Nkind (gnat_node
) == N_Function_Call
)
1884 gnu_result
= gnu_subprog_call
;
1886 /* If the function returns an unconstrained array or by reference,
1887 we have to de-dereference the pointer. */
1888 if (TYPE_RETURNS_UNCONSTRAINED_P (gnu_subprog_type
)
1889 || TYPE_RETURNS_BY_REF_P (gnu_subprog_type
))
1890 gnu_result
= build_unary_op (INDIRECT_REF
, NULL_TREE
, gnu_result
);
1893 gnu_result
= build_binary_op (MODIFY_EXPR
, NULL_TREE
,
1894 gnu_target
, gnu_result
);
1896 *gnu_result_type_p
= get_unpadded_type (Etype (gnat_node
));
1901 /* If this is the case where the GNAT tree contains a procedure call
1902 but the Ada procedure has copy in copy out parameters, the special
1903 parameter passing mechanism must be used. */
1904 else if (TYPE_CI_CO_LIST (gnu_subprog_type
) != NULL_TREE
)
1906 /* List of FIELD_DECLs associated with the PARM_DECLs of the copy
1907 in copy out parameters. */
1908 tree scalar_return_list
= TYPE_CI_CO_LIST (gnu_subprog_type
);
1909 int length
= list_length (scalar_return_list
);
1915 gnu_subprog_call
= save_expr (gnu_subprog_call
);
1916 gnu_name_list
= nreverse (gnu_name_list
);
1918 /* If any of the names had side-effects, ensure they are all
1919 evaluated before the call. */
1920 for (gnu_name
= gnu_name_list
; gnu_name
;
1921 gnu_name
= TREE_CHAIN (gnu_name
))
1922 if (TREE_SIDE_EFFECTS (TREE_VALUE (gnu_name
)))
1923 append_to_statement_list (TREE_VALUE (gnu_name
),
1927 if (Nkind (Name (gnat_node
)) == N_Explicit_Dereference
)
1928 gnat_formal
= First_Formal (Etype (Name (gnat_node
)));
1930 gnat_formal
= First_Formal (Entity (Name (gnat_node
)));
1932 for (gnat_actual
= First_Actual (gnat_node
);
1933 Present (gnat_actual
);
1934 gnat_formal
= Next_Formal_With_Extras (gnat_formal
),
1935 gnat_actual
= Next_Actual (gnat_actual
))
1936 /* If we are dealing with a copy in copy out parameter, we must
1937 retrieve its value from the record returned in the call. */
1938 if (!(present_gnu_tree (gnat_formal
)
1939 && TREE_CODE (get_gnu_tree (gnat_formal
)) == PARM_DECL
1940 && (DECL_BY_REF_P (get_gnu_tree (gnat_formal
))
1941 || (TREE_CODE (get_gnu_tree (gnat_formal
)) == PARM_DECL
1942 && ((DECL_BY_COMPONENT_PTR_P (get_gnu_tree (gnat_formal
))
1943 || (DECL_BY_DESCRIPTOR_P
1944 (get_gnu_tree (gnat_formal
))))))))
1945 && Ekind (gnat_formal
) != E_In_Parameter
)
1947 /* Get the value to assign to this OUT or IN OUT parameter. It is
1948 either the result of the function if there is only a single such
1949 parameter or the appropriate field from the record returned. */
1951 = length
== 1 ? gnu_subprog_call
1952 : build_component_ref (gnu_subprog_call
, NULL_TREE
,
1953 TREE_PURPOSE (scalar_return_list
),
1955 bool unchecked_conversion
= (Nkind (gnat_actual
)
1956 == N_Unchecked_Type_Conversion
);
1957 /* If the actual is a conversion, get the inner expression, which
1958 will be the real destination, and convert the result to the
1959 type of the actual parameter. */
1961 = maybe_unconstrained_array (TREE_VALUE (gnu_name_list
));
1963 /* If the result is a padded type, remove the padding. */
1964 if (TREE_CODE (TREE_TYPE (gnu_result
)) == RECORD_TYPE
1965 && TYPE_IS_PADDING_P (TREE_TYPE (gnu_result
)))
1966 gnu_result
= convert (TREE_TYPE (TYPE_FIELDS
1967 (TREE_TYPE (gnu_result
))),
1970 /* If the result is a type conversion, do it. */
1971 if (Nkind (gnat_actual
) == N_Type_Conversion
)
1973 = convert_with_check
1974 (Etype (Expression (gnat_actual
)), gnu_result
,
1975 Do_Overflow_Check (gnat_actual
),
1976 Do_Range_Check (Expression (gnat_actual
)),
1977 Float_Truncate (gnat_actual
));
1979 else if (unchecked_conversion
)
1980 gnu_result
= unchecked_convert (TREE_TYPE (gnu_actual
),
1982 No_Truncation (gnat_actual
));
1985 if (Do_Range_Check (gnat_actual
))
1986 gnu_result
= emit_range_check (gnu_result
,
1987 Etype (gnat_actual
));
1989 if (!(!TREE_CONSTANT (TYPE_SIZE (TREE_TYPE (gnu_actual
)))
1990 && TREE_CONSTANT (TYPE_SIZE (TREE_TYPE (gnu_result
)))))
1991 gnu_result
= convert (TREE_TYPE (gnu_actual
), gnu_result
);
1994 gnu_result
= build_binary_op (MODIFY_EXPR
, NULL_TREE
,
1995 gnu_actual
, gnu_result
);
1996 annotate_with_node (gnu_result
, gnat_actual
);
1997 append_to_statement_list (gnu_result
, &gnu_before_list
);
1998 scalar_return_list
= TREE_CHAIN (scalar_return_list
);
1999 gnu_name_list
= TREE_CHAIN (gnu_name_list
);
2004 annotate_with_node (gnu_subprog_call
, gnat_node
);
2005 append_to_statement_list (gnu_subprog_call
, &gnu_before_list
);
2008 append_to_statement_list (gnu_after_list
, &gnu_before_list
);
2009 return gnu_before_list
;
2012 /* Subroutine of gnat_to_gnu to translate gnat_node, an
2013 N_Handled_Sequence_Of_Statements, to a GCC tree, which is returned. */
2016 Handled_Sequence_Of_Statements_to_gnu (Node_Id gnat_node
)
2018 tree gnu_jmpsave_decl
= NULL_TREE
;
2019 tree gnu_jmpbuf_decl
= NULL_TREE
;
2020 /* If just annotating, ignore all EH and cleanups. */
2021 bool gcc_zcx
= (!type_annotate_only
2022 && Present (Exception_Handlers (gnat_node
))
2023 && Exception_Mechanism
== GCC_ZCX
);
2025 = (!type_annotate_only
&& Present (Exception_Handlers (gnat_node
))
2026 && Exception_Mechanism
== Setjmp_Longjmp
);
2027 bool at_end
= !type_annotate_only
&& Present (At_End_Proc (gnat_node
));
2028 bool binding_for_block
= (at_end
|| gcc_zcx
|| setjmp_longjmp
);
2029 tree gnu_inner_block
; /* The statement(s) for the block itself. */
2034 /* The GCC exception handling mechanism can handle both ZCX and SJLJ schemes
2035 and we have our own SJLJ mechanism. To call the GCC mechanism, we call
2036 add_cleanup, and when we leave the binding, end_stmt_group will create
2037 the TRY_FINALLY_EXPR.
2039 ??? The region level calls down there have been specifically put in place
2040 for a ZCX context and currently the order in which things are emitted
2041 (region/handlers) is different from the SJLJ case. Instead of putting
2042 other calls with different conditions at other places for the SJLJ case,
2043 it seems cleaner to reorder things for the SJLJ case and generalize the
2044 condition to make it not ZCX specific.
2046 If there are any exceptions or cleanup processing involved, we need an
2047 outer statement group (for Setjmp_Longjmp) and binding level. */
2048 if (binding_for_block
)
2050 start_stmt_group ();
2054 /* If we are to call a function when exiting this block add a cleanup
2055 to the binding level we made above. */
2057 add_cleanup (build_call_0_expr (gnat_to_gnu (At_End_Proc (gnat_node
))));
2059 /* If using setjmp_longjmp, make the variables for the setjmp buffer and save
2060 area for address of previous buffer. Do this first since we need to have
2061 the setjmp buf known for any decls in this block. */
2064 gnu_jmpsave_decl
= create_var_decl (get_identifier ("JMPBUF_SAVE"),
2065 NULL_TREE
, jmpbuf_ptr_type
,
2066 build_call_0_expr (get_jmpbuf_decl
),
2067 false, false, false, false, NULL
,
2069 gnu_jmpbuf_decl
= create_var_decl (get_identifier ("JMP_BUF"),
2070 NULL_TREE
, jmpbuf_type
,
2071 NULL_TREE
, false, false, false, false,
2074 set_block_jmpbuf_decl (gnu_jmpbuf_decl
);
2076 /* When we exit this block, restore the saved value. */
2077 add_cleanup (build_call_1_expr (set_jmpbuf_decl
, gnu_jmpsave_decl
));
2080 /* Now build the tree for the declarations and statements inside this block.
2081 If this is SJLJ, set our jmp_buf as the current buffer. */
2082 start_stmt_group ();
2085 add_stmt (build_call_1_expr (set_jmpbuf_decl
,
2086 build_unary_op (ADDR_EXPR
, NULL_TREE
,
2089 if (Present (First_Real_Statement (gnat_node
)))
2090 process_decls (Statements (gnat_node
), Empty
,
2091 First_Real_Statement (gnat_node
), true, true);
2093 /* Generate code for each statement in the block. */
2094 for (gnat_temp
= (Present (First_Real_Statement (gnat_node
))
2095 ? First_Real_Statement (gnat_node
)
2096 : First (Statements (gnat_node
)));
2097 Present (gnat_temp
); gnat_temp
= Next (gnat_temp
))
2098 add_stmt (gnat_to_gnu (gnat_temp
));
2099 gnu_inner_block
= end_stmt_group ();
2101 /* Now generate code for the two exception models, if either is relevant for
2105 tree
*gnu_else_ptr
= 0;
2108 /* Make a binding level for the exception handling declarations and code
2109 and set up gnu_except_ptr_stack for the handlers to use. */
2110 start_stmt_group ();
2113 push_stack (&gnu_except_ptr_stack
, NULL_TREE
,
2114 create_var_decl (get_identifier ("EXCEPT_PTR"),
2116 build_pointer_type (except_type_node
),
2117 build_call_0_expr (get_excptr_decl
), false,
2118 false, false, false, NULL
, gnat_node
));
2120 /* Generate code for each handler. The N_Exception_Handler case does the
2121 real work and returns a COND_EXPR for each handler, which we chain
2123 for (gnat_temp
= First_Non_Pragma (Exception_Handlers (gnat_node
));
2124 Present (gnat_temp
); gnat_temp
= Next_Non_Pragma (gnat_temp
))
2126 gnu_expr
= gnat_to_gnu (gnat_temp
);
2128 /* If this is the first one, set it as the outer one. Otherwise,
2129 point the "else" part of the previous handler to us. Then point
2130 to our "else" part. */
2132 add_stmt (gnu_expr
);
2134 *gnu_else_ptr
= gnu_expr
;
2136 gnu_else_ptr
= &COND_EXPR_ELSE (gnu_expr
);
2139 /* If none of the exception handlers did anything, re-raise but do not
2141 gnu_expr
= build_call_1_expr (raise_nodefer_decl
,
2142 TREE_VALUE (gnu_except_ptr_stack
));
2143 annotate_with_node (gnu_expr
, gnat_node
);
2146 *gnu_else_ptr
= gnu_expr
;
2148 add_stmt (gnu_expr
);
2150 /* End the binding level dedicated to the exception handlers and get the
2151 whole statement group. */
2152 pop_stack (&gnu_except_ptr_stack
);
2154 gnu_handler
= end_stmt_group ();
2156 /* If the setjmp returns 1, we restore our incoming longjmp value and
2157 then check the handlers. */
2158 start_stmt_group ();
2159 add_stmt_with_node (build_call_1_expr (set_jmpbuf_decl
,
2162 add_stmt (gnu_handler
);
2163 gnu_handler
= end_stmt_group ();
2165 /* This block is now "if (setjmp) ... <handlers> else <block>". */
2166 gnu_result
= build3 (COND_EXPR
, void_type_node
,
2169 build_unary_op (ADDR_EXPR
, NULL_TREE
,
2171 gnu_handler
, gnu_inner_block
);
2177 /* First make a block containing the handlers. */
2178 start_stmt_group ();
2179 for (gnat_temp
= First_Non_Pragma (Exception_Handlers (gnat_node
));
2180 Present (gnat_temp
);
2181 gnat_temp
= Next_Non_Pragma (gnat_temp
))
2182 add_stmt (gnat_to_gnu (gnat_temp
));
2183 gnu_handlers
= end_stmt_group ();
2185 /* Now make the TRY_CATCH_EXPR for the block. */
2186 gnu_result
= build2 (TRY_CATCH_EXPR
, void_type_node
,
2187 gnu_inner_block
, gnu_handlers
);
2190 gnu_result
= gnu_inner_block
;
2192 /* Now close our outer block, if we had to make one. */
2193 if (binding_for_block
)
2195 add_stmt (gnu_result
);
2197 gnu_result
= end_stmt_group ();
2203 /* Subroutine of gnat_to_gnu to translate gnat_node, an N_Exception_Handler,
2204 to a GCC tree, which is returned. This is the variant for Setjmp_Longjmp
2205 exception handling. */
2208 Exception_Handler_to_gnu_sjlj (Node_Id gnat_node
)
2210 /* Unless this is "Others" or the special "Non-Ada" exception for Ada, make
2211 an "if" statement to select the proper exceptions. For "Others", exclude
2212 exceptions where Handled_By_Others is nonzero unless the All_Others flag
2213 is set. For "Non-ada", accept an exception if "Lang" is 'V'. */
2214 tree gnu_choice
= integer_zero_node
;
2215 tree gnu_body
= build_stmt_group (Statements (gnat_node
), false);
2218 for (gnat_temp
= First (Exception_Choices (gnat_node
));
2219 gnat_temp
; gnat_temp
= Next (gnat_temp
))
2223 if (Nkind (gnat_temp
) == N_Others_Choice
)
2225 if (All_Others (gnat_temp
))
2226 this_choice
= integer_one_node
;
2230 (EQ_EXPR
, integer_type_node
,
2235 (INDIRECT_REF
, NULL_TREE
,
2236 TREE_VALUE (gnu_except_ptr_stack
)),
2237 get_identifier ("not_handled_by_others"), NULL_TREE
,
2242 else if (Nkind (gnat_temp
) == N_Identifier
2243 || Nkind (gnat_temp
) == N_Expanded_Name
)
2245 Entity_Id gnat_ex_id
= Entity (gnat_temp
);
2248 /* Exception may be a renaming. Recover original exception which is
2249 the one elaborated and registered. */
2250 if (Present (Renamed_Object (gnat_ex_id
)))
2251 gnat_ex_id
= Renamed_Object (gnat_ex_id
);
2253 gnu_expr
= gnat_to_gnu_entity (gnat_ex_id
, NULL_TREE
, 0);
2257 (EQ_EXPR
, integer_type_node
, TREE_VALUE (gnu_except_ptr_stack
),
2258 convert (TREE_TYPE (TREE_VALUE (gnu_except_ptr_stack
)),
2259 build_unary_op (ADDR_EXPR
, NULL_TREE
, gnu_expr
)));
2261 /* If this is the distinguished exception "Non_Ada_Error" (and we are
2262 in VMS mode), also allow a non-Ada exception (a VMS condition) t
2264 if (Is_Non_Ada_Error (Entity (gnat_temp
)))
2267 = build_component_ref
2268 (build_unary_op (INDIRECT_REF
, NULL_TREE
,
2269 TREE_VALUE (gnu_except_ptr_stack
)),
2270 get_identifier ("lang"), NULL_TREE
, false);
2274 (TRUTH_ORIF_EXPR
, integer_type_node
,
2275 build_binary_op (EQ_EXPR
, integer_type_node
, gnu_comp
,
2276 build_int_cst (TREE_TYPE (gnu_comp
), 'V')),
2283 gnu_choice
= build_binary_op (TRUTH_ORIF_EXPR
, integer_type_node
,
2284 gnu_choice
, this_choice
);
2287 return build3 (COND_EXPR
, void_type_node
, gnu_choice
, gnu_body
, NULL_TREE
);
2290 /* Subroutine of gnat_to_gnu to translate gnat_node, an N_Exception_Handler,
2291 to a GCC tree, which is returned. This is the variant for ZCX. */
2294 Exception_Handler_to_gnu_zcx (Node_Id gnat_node
)
2296 tree gnu_etypes_list
= NULL_TREE
;
2299 tree gnu_current_exc_ptr
;
2300 tree gnu_incoming_exc_ptr
;
2303 /* We build a TREE_LIST of nodes representing what exception types this
2304 handler can catch, with special cases for others and all others cases.
2306 Each exception type is actually identified by a pointer to the exception
2307 id, or to a dummy object for "others" and "all others".
2309 Care should be taken to ensure that the control flow impact of "others"
2310 and "all others" is known to GCC. lang_eh_type_covers is doing the trick
2312 for (gnat_temp
= First (Exception_Choices (gnat_node
));
2313 gnat_temp
; gnat_temp
= Next (gnat_temp
))
2315 if (Nkind (gnat_temp
) == N_Others_Choice
)
2318 = All_Others (gnat_temp
) ? all_others_decl
: others_decl
;
2321 = build_unary_op (ADDR_EXPR
, NULL_TREE
, gnu_expr
);
2323 else if (Nkind (gnat_temp
) == N_Identifier
2324 || Nkind (gnat_temp
) == N_Expanded_Name
)
2326 Entity_Id gnat_ex_id
= Entity (gnat_temp
);
2328 /* Exception may be a renaming. Recover original exception which is
2329 the one elaborated and registered. */
2330 if (Present (Renamed_Object (gnat_ex_id
)))
2331 gnat_ex_id
= Renamed_Object (gnat_ex_id
);
2333 gnu_expr
= gnat_to_gnu_entity (gnat_ex_id
, NULL_TREE
, 0);
2334 gnu_etype
= build_unary_op (ADDR_EXPR
, NULL_TREE
, gnu_expr
);
2336 /* The Non_Ada_Error case for VMS exceptions is handled
2337 by the personality routine. */
2342 /* The GCC interface expects NULL to be passed for catch all handlers, so
2343 it would be quite tempting to set gnu_etypes_list to NULL if gnu_etype
2344 is integer_zero_node. It would not work, however, because GCC's
2345 notion of "catch all" is stronger than our notion of "others". Until
2346 we correctly use the cleanup interface as well, doing that would
2347 prevent the "all others" handlers from being seen, because nothing
2348 can be caught beyond a catch all from GCC's point of view. */
2349 gnu_etypes_list
= tree_cons (NULL_TREE
, gnu_etype
, gnu_etypes_list
);
2352 start_stmt_group ();
2355 /* Expand a call to the begin_handler hook at the beginning of the handler,
2356 and arrange for a call to the end_handler hook to occur on every possible
2359 The hooks expect a pointer to the low level occurrence. This is required
2360 for our stack management scheme because a raise inside the handler pushes
2361 a new occurrence on top of the stack, which means that this top does not
2362 necessarily match the occurrence this handler was dealing with.
2364 The EXC_PTR_EXPR object references the exception occurrence being
2365 propagated. Upon handler entry, this is the exception for which the
2366 handler is triggered. This might not be the case upon handler exit,
2367 however, as we might have a new occurrence propagated by the handler's
2368 body, and the end_handler hook called as a cleanup in this context.
2370 We use a local variable to retrieve the incoming value at handler entry
2371 time, and reuse it to feed the end_handler hook's argument at exit. */
2372 gnu_current_exc_ptr
= build0 (EXC_PTR_EXPR
, ptr_type_node
);
2373 gnu_incoming_exc_ptr
= create_var_decl (get_identifier ("EXPTR"), NULL_TREE
,
2374 ptr_type_node
, gnu_current_exc_ptr
,
2375 false, false, false, false, NULL
,
2378 add_stmt_with_node (build_call_1_expr (begin_handler_decl
,
2379 gnu_incoming_exc_ptr
),
2381 add_cleanup (build_call_1_expr (end_handler_decl
, gnu_incoming_exc_ptr
));
2382 add_stmt_list (Statements (gnat_node
));
2385 return build2 (CATCH_EXPR
, void_type_node
, gnu_etypes_list
,
2389 /* Subroutine of gnat_to_gnu to generate code for an N_Compilation unit. */
2392 Compilation_Unit_to_gnu (Node_Id gnat_node
)
2394 /* Make the decl for the elaboration procedure. */
2395 bool body_p
= (Defining_Entity (Unit (gnat_node
)),
2396 Nkind (Unit (gnat_node
)) == N_Package_Body
2397 || Nkind (Unit (gnat_node
)) == N_Subprogram_Body
);
2398 Entity_Id gnat_unit_entity
= Defining_Entity (Unit (gnat_node
));
2399 tree gnu_elab_proc_decl
2400 = create_subprog_decl
2401 (create_concat_name (gnat_unit_entity
,
2402 body_p
? "elabb" : "elabs"),
2403 NULL_TREE
, void_ftype
, NULL_TREE
, false, true, false, NULL
,
2405 struct elab_info
*info
;
2407 push_stack (&gnu_elab_proc_stack
, NULL_TREE
, gnu_elab_proc_decl
);
2409 DECL_ELABORATION_PROC_P (gnu_elab_proc_decl
) = 1;
2410 allocate_struct_function (gnu_elab_proc_decl
);
2411 Sloc_to_locus (Sloc (gnat_unit_entity
), &cfun
->function_end_locus
);
2414 /* For a body, first process the spec if there is one. */
2415 if (Nkind (Unit (gnat_node
)) == N_Package_Body
2416 || (Nkind (Unit (gnat_node
)) == N_Subprogram_Body
2417 && !Acts_As_Spec (gnat_node
)))
2418 add_stmt (gnat_to_gnu (Library_Unit (gnat_node
)));
2420 process_inlined_subprograms (gnat_node
);
2422 if (type_annotate_only
)
2424 elaborate_all_entities (gnat_node
);
2426 if (Nkind (Unit (gnat_node
)) == N_Subprogram_Declaration
2427 || Nkind (Unit (gnat_node
)) == N_Generic_Package_Declaration
2428 || Nkind (Unit (gnat_node
)) == N_Generic_Subprogram_Declaration
)
2432 process_decls (Declarations (Aux_Decls_Node (gnat_node
)), Empty
, Empty
,
2434 add_stmt (gnat_to_gnu (Unit (gnat_node
)));
2436 /* Process any pragmas and actions following the unit. */
2437 add_stmt_list (Pragmas_After (Aux_Decls_Node (gnat_node
)));
2438 add_stmt_list (Actions (Aux_Decls_Node (gnat_node
)));
2440 /* Save away what we've made so far and record this potential elaboration
2442 info
= (struct elab_info
*) ggc_alloc (sizeof (struct elab_info
));
2443 set_current_block_context (gnu_elab_proc_decl
);
2445 DECL_SAVED_TREE (gnu_elab_proc_decl
) = end_stmt_group ();
2446 info
->next
= elab_info_list
;
2447 info
->elab_proc
= gnu_elab_proc_decl
;
2448 info
->gnat_node
= gnat_node
;
2449 elab_info_list
= info
;
2451 /* Generate elaboration code for this unit, if necessary, and say whether
2453 pop_stack (&gnu_elab_proc_stack
);
2455 /* Generate functions to call static constructors and destructors
2456 for targets that do not support .ctors/.dtors sections. These
2457 functions have magic names which are detected by collect2. */
2459 build_global_cdtor ('I', &static_ctors
);
2462 build_global_cdtor ('D', &static_dtors
);
2465 /* This function is the driver of the GNAT to GCC tree transformation
2466 process. It is the entry point of the tree transformer. GNAT_NODE is the
2467 root of some GNAT tree. Return the root of the corresponding GCC tree.
2468 If this is an expression, return the GCC equivalent of the expression. If
2469 it is a statement, return the statement. In the case when called for a
2470 statement, it may also add statements to the current statement group, in
2471 which case anything it returns is to be interpreted as occurring after
2472 anything `it already added. */
2475 gnat_to_gnu (Node_Id gnat_node
)
2477 bool went_into_elab_proc
= false;
2478 tree gnu_result
= error_mark_node
; /* Default to no value. */
2479 tree gnu_result_type
= void_type_node
;
2481 tree gnu_lhs
, gnu_rhs
;
2484 /* Save node number for error message and set location information. */
2485 error_gnat_node
= gnat_node
;
2486 Sloc_to_locus (Sloc (gnat_node
), &input_location
);
2488 if (type_annotate_only
2489 && IN (Nkind (gnat_node
), N_Statement_Other_Than_Procedure_Call
))
2490 return alloc_stmt_list ();
2492 /* If this node is a non-static subexpression and we are only
2493 annotating types, make this into a NULL_EXPR. */
2494 if (type_annotate_only
2495 && IN (Nkind (gnat_node
), N_Subexpr
)
2496 && Nkind (gnat_node
) != N_Identifier
2497 && !Compile_Time_Known_Value (gnat_node
))
2498 return build1 (NULL_EXPR
, get_unpadded_type (Etype (gnat_node
)),
2499 build_call_raise (CE_Range_Check_Failed
));
2501 /* If this is a Statement and we are at top level, it must be part of
2502 the elaboration procedure, so mark us as being in that procedure
2503 and push our context. */
2504 if (!current_function_decl
2505 && ((IN (Nkind (gnat_node
), N_Statement_Other_Than_Procedure_Call
)
2506 && Nkind (gnat_node
) != N_Null_Statement
)
2507 || Nkind (gnat_node
) == N_Procedure_Call_Statement
2508 || Nkind (gnat_node
) == N_Label
2509 || Nkind (gnat_node
) == N_Implicit_Label_Declaration
2510 || Nkind (gnat_node
) == N_Handled_Sequence_Of_Statements
2511 || ((Nkind (gnat_node
) == N_Raise_Constraint_Error
2512 || Nkind (gnat_node
) == N_Raise_Storage_Error
2513 || Nkind (gnat_node
) == N_Raise_Program_Error
)
2514 && (Ekind (Etype (gnat_node
)) == E_Void
))))
2516 current_function_decl
= TREE_VALUE (gnu_elab_proc_stack
);
2517 start_stmt_group ();
2519 went_into_elab_proc
= true;
2522 switch (Nkind (gnat_node
))
2524 /********************************/
2525 /* Chapter 2: Lexical Elements: */
2526 /********************************/
2529 case N_Expanded_Name
:
2530 case N_Operator_Symbol
:
2531 case N_Defining_Identifier
:
2532 gnu_result
= Identifier_to_gnu (gnat_node
, &gnu_result_type
);
2535 case N_Integer_Literal
:
2539 /* Get the type of the result, looking inside any padding and
2540 justified modular types. Then get the value in that type. */
2541 gnu_type
= gnu_result_type
= get_unpadded_type (Etype (gnat_node
));
2543 if (TREE_CODE (gnu_type
) == RECORD_TYPE
2544 && TYPE_JUSTIFIED_MODULAR_P (gnu_type
))
2545 gnu_type
= TREE_TYPE (TYPE_FIELDS (gnu_type
));
2547 gnu_result
= UI_To_gnu (Intval (gnat_node
), gnu_type
);
2549 /* If the result overflows (meaning it doesn't fit in its base type),
2550 abort. We would like to check that the value is within the range
2551 of the subtype, but that causes problems with subtypes whose usage
2552 will raise Constraint_Error and with biased representation, so
2554 gcc_assert (!TREE_CONSTANT_OVERFLOW (gnu_result
));
2558 case N_Character_Literal
:
2559 /* If a Entity is present, it means that this was one of the
2560 literals in a user-defined character type. In that case,
2561 just return the value in the CONST_DECL. Otherwise, use the
2562 character code. In that case, the base type should be an
2563 INTEGER_TYPE, but we won't bother checking for that. */
2564 gnu_result_type
= get_unpadded_type (Etype (gnat_node
));
2565 if (Present (Entity (gnat_node
)))
2566 gnu_result
= DECL_INITIAL (get_gnu_tree (Entity (gnat_node
)));
2571 (gnu_result_type
, UI_To_CC (Char_Literal_Value (gnat_node
))),
2572 false, false, false);
2575 case N_Real_Literal
:
2576 /* If this is of a fixed-point type, the value we want is the
2577 value of the corresponding integer. */
2578 if (IN (Ekind (Underlying_Type (Etype (gnat_node
))), Fixed_Point_Kind
))
2580 gnu_result_type
= get_unpadded_type (Etype (gnat_node
));
2581 gnu_result
= UI_To_gnu (Corresponding_Integer_Value (gnat_node
),
2583 gcc_assert (!TREE_CONSTANT_OVERFLOW (gnu_result
));
2586 /* We should never see a Vax_Float type literal, since the front end
2587 is supposed to transform these using appropriate conversions */
2588 else if (Vax_Float (Underlying_Type (Etype (gnat_node
))))
2593 Ureal ur_realval
= Realval (gnat_node
);
2595 gnu_result_type
= get_unpadded_type (Etype (gnat_node
));
2597 /* If the real value is zero, so is the result. Otherwise,
2598 convert it to a machine number if it isn't already. That
2599 forces BASE to 0 or 2 and simplifies the rest of our logic. */
2600 if (UR_Is_Zero (ur_realval
))
2601 gnu_result
= convert (gnu_result_type
, integer_zero_node
);
2604 if (!Is_Machine_Number (gnat_node
))
2606 = Machine (Base_Type (Underlying_Type (Etype (gnat_node
))),
2607 ur_realval
, Round_Even
, gnat_node
);
2610 = UI_To_gnu (Numerator (ur_realval
), gnu_result_type
);
2612 /* If we have a base of zero, divide by the denominator.
2613 Otherwise, the base must be 2 and we scale the value, which
2614 we know can fit in the mantissa of the type (hence the use
2615 of that type above). */
2616 if (No (Rbase (ur_realval
)))
2618 = build_binary_op (RDIV_EXPR
,
2619 get_base_type (gnu_result_type
),
2621 UI_To_gnu (Denominator (ur_realval
),
2625 REAL_VALUE_TYPE tmp
;
2627 gcc_assert (Rbase (ur_realval
) == 2);
2628 real_ldexp (&tmp
, &TREE_REAL_CST (gnu_result
),
2629 - UI_To_Int (Denominator (ur_realval
)));
2630 gnu_result
= build_real (gnu_result_type
, tmp
);
2634 /* Now see if we need to negate the result. Do it this way to
2635 properly handle -0. */
2636 if (UR_Is_Negative (Realval (gnat_node
)))
2638 = build_unary_op (NEGATE_EXPR
, get_base_type (gnu_result_type
),
2644 case N_String_Literal
:
2645 gnu_result_type
= get_unpadded_type (Etype (gnat_node
));
2646 if (TYPE_PRECISION (TREE_TYPE (gnu_result_type
)) == HOST_BITS_PER_CHAR
)
2648 String_Id gnat_string
= Strval (gnat_node
);
2649 int length
= String_Length (gnat_string
);
2650 char *string
= (char *) alloca (length
+ 1);
2653 /* Build the string with the characters in the literal. Note
2654 that Ada strings are 1-origin. */
2655 for (i
= 0; i
< length
; i
++)
2656 string
[i
] = Get_String_Char (gnat_string
, i
+ 1);
2658 /* Put a null at the end of the string in case it's in a context
2659 where GCC will want to treat it as a C string. */
2662 gnu_result
= build_string (length
, string
);
2664 /* Strings in GCC don't normally have types, but we want
2665 this to not be converted to the array type. */
2666 TREE_TYPE (gnu_result
) = gnu_result_type
;
2670 /* Build a list consisting of each character, then make
2672 String_Id gnat_string
= Strval (gnat_node
);
2673 int length
= String_Length (gnat_string
);
2675 tree gnu_list
= NULL_TREE
;
2676 tree gnu_idx
= TYPE_MIN_VALUE (TYPE_DOMAIN (gnu_result_type
));
2678 for (i
= 0; i
< length
; i
++)
2681 = tree_cons (gnu_idx
,
2682 build_int_cst (TREE_TYPE (gnu_result_type
),
2683 Get_String_Char (gnat_string
,
2687 gnu_idx
= int_const_binop (PLUS_EXPR
, gnu_idx
, integer_one_node
,
2692 = gnat_build_constructor (gnu_result_type
, nreverse (gnu_list
));
2697 gnu_result
= Pragma_to_gnu (gnat_node
);
2700 /**************************************/
2701 /* Chapter 3: Declarations and Types: */
2702 /**************************************/
2704 case N_Subtype_Declaration
:
2705 case N_Full_Type_Declaration
:
2706 case N_Incomplete_Type_Declaration
:
2707 case N_Private_Type_Declaration
:
2708 case N_Private_Extension_Declaration
:
2709 case N_Task_Type_Declaration
:
2710 process_type (Defining_Entity (gnat_node
));
2711 gnu_result
= alloc_stmt_list ();
2714 case N_Object_Declaration
:
2715 case N_Exception_Declaration
:
2716 gnat_temp
= Defining_Entity (gnat_node
);
2717 gnu_result
= alloc_stmt_list ();
2719 /* If we are just annotating types and this object has an unconstrained
2720 or task type, don't elaborate it. */
2721 if (type_annotate_only
2722 && (((Is_Array_Type (Etype (gnat_temp
))
2723 || Is_Record_Type (Etype (gnat_temp
)))
2724 && !Is_Constrained (Etype (gnat_temp
)))
2725 || Is_Concurrent_Type (Etype (gnat_temp
))))
2728 if (Present (Expression (gnat_node
))
2729 && !(Nkind (gnat_node
) == N_Object_Declaration
2730 && No_Initialization (gnat_node
))
2731 && (!type_annotate_only
2732 || Compile_Time_Known_Value (Expression (gnat_node
))))
2734 gnu_expr
= gnat_to_gnu (Expression (gnat_node
));
2735 if (Do_Range_Check (Expression (gnat_node
)))
2736 gnu_expr
= emit_range_check (gnu_expr
, Etype (gnat_temp
));
2738 /* If this object has its elaboration delayed, we must force
2739 evaluation of GNU_EXPR right now and save it for when the object
2741 if (Present (Freeze_Node (gnat_temp
)))
2743 if ((Is_Public (gnat_temp
) || global_bindings_p ())
2744 && !TREE_CONSTANT (gnu_expr
))
2746 = create_var_decl (create_concat_name (gnat_temp
, "init"),
2747 NULL_TREE
, TREE_TYPE (gnu_expr
),
2748 gnu_expr
, false, Is_Public (gnat_temp
),
2749 false, false, NULL
, gnat_temp
);
2751 gnu_expr
= maybe_variable (gnu_expr
);
2753 save_gnu_tree (gnat_node
, gnu_expr
, true);
2757 gnu_expr
= NULL_TREE
;
2759 if (type_annotate_only
&& gnu_expr
&& TREE_CODE (gnu_expr
) == ERROR_MARK
)
2760 gnu_expr
= NULL_TREE
;
2762 if (No (Freeze_Node (gnat_temp
)))
2763 gnat_to_gnu_entity (gnat_temp
, gnu_expr
, 1);
2766 case N_Object_Renaming_Declaration
:
2767 gnat_temp
= Defining_Entity (gnat_node
);
2769 /* Don't do anything if this renaming is handled by the front end or if
2770 we are just annotating types and this object has a composite or task
2771 type, don't elaborate it. We return the result in case it has any
2772 SAVE_EXPRs in it that need to be evaluated here. */
2773 if (!Is_Renaming_Of_Object (gnat_temp
)
2774 && ! (type_annotate_only
2775 && (Is_Array_Type (Etype (gnat_temp
))
2776 || Is_Record_Type (Etype (gnat_temp
))
2777 || Is_Concurrent_Type (Etype (gnat_temp
)))))
2779 = gnat_to_gnu_entity (gnat_temp
,
2780 gnat_to_gnu (Renamed_Object (gnat_temp
)), 1);
2782 gnu_result
= alloc_stmt_list ();
2785 case N_Implicit_Label_Declaration
:
2786 gnat_to_gnu_entity (Defining_Entity (gnat_node
), NULL_TREE
, 1);
2787 gnu_result
= alloc_stmt_list ();
2790 case N_Exception_Renaming_Declaration
:
2791 case N_Number_Declaration
:
2792 case N_Package_Renaming_Declaration
:
2793 case N_Subprogram_Renaming_Declaration
:
2794 /* These are fully handled in the front end. */
2795 gnu_result
= alloc_stmt_list ();
2798 /*************************************/
2799 /* Chapter 4: Names and Expressions: */
2800 /*************************************/
2802 case N_Explicit_Dereference
:
2803 gnu_result
= gnat_to_gnu (Prefix (gnat_node
));
2804 gnu_result_type
= get_unpadded_type (Etype (gnat_node
));
2805 gnu_result
= build_unary_op (INDIRECT_REF
, NULL_TREE
, gnu_result
);
2808 case N_Indexed_Component
:
2810 tree gnu_array_object
= gnat_to_gnu (Prefix (gnat_node
));
2814 Node_Id
*gnat_expr_array
;
2816 gnu_array_object
= maybe_implicit_deref (gnu_array_object
);
2817 gnu_array_object
= maybe_unconstrained_array (gnu_array_object
);
2819 /* If we got a padded type, remove it too. */
2820 if (TREE_CODE (TREE_TYPE (gnu_array_object
)) == RECORD_TYPE
2821 && TYPE_IS_PADDING_P (TREE_TYPE (gnu_array_object
)))
2823 = convert (TREE_TYPE (TYPE_FIELDS (TREE_TYPE (gnu_array_object
))),
2826 gnu_result
= gnu_array_object
;
2828 /* First compute the number of dimensions of the array, then
2829 fill the expression array, the order depending on whether
2830 this is a Convention_Fortran array or not. */
2831 for (ndim
= 1, gnu_type
= TREE_TYPE (gnu_array_object
);
2832 TREE_CODE (TREE_TYPE (gnu_type
)) == ARRAY_TYPE
2833 && TYPE_MULTI_ARRAY_P (TREE_TYPE (gnu_type
));
2834 ndim
++, gnu_type
= TREE_TYPE (gnu_type
))
2837 gnat_expr_array
= (Node_Id
*) alloca (ndim
* sizeof (Node_Id
));
2839 if (TYPE_CONVENTION_FORTRAN_P (TREE_TYPE (gnu_array_object
)))
2840 for (i
= ndim
- 1, gnat_temp
= First (Expressions (gnat_node
));
2842 i
--, gnat_temp
= Next (gnat_temp
))
2843 gnat_expr_array
[i
] = gnat_temp
;
2845 for (i
= 0, gnat_temp
= First (Expressions (gnat_node
));
2847 i
++, gnat_temp
= Next (gnat_temp
))
2848 gnat_expr_array
[i
] = gnat_temp
;
2850 for (i
= 0, gnu_type
= TREE_TYPE (gnu_array_object
);
2851 i
< ndim
; i
++, gnu_type
= TREE_TYPE (gnu_type
))
2853 gcc_assert (TREE_CODE (gnu_type
) == ARRAY_TYPE
);
2854 gnat_temp
= gnat_expr_array
[i
];
2855 gnu_expr
= gnat_to_gnu (gnat_temp
);
2857 if (Do_Range_Check (gnat_temp
))
2860 (gnu_array_object
, gnu_expr
,
2861 TYPE_MIN_VALUE (TYPE_INDEX_TYPE (TYPE_DOMAIN (gnu_type
))),
2862 TYPE_MAX_VALUE (TYPE_INDEX_TYPE (TYPE_DOMAIN (gnu_type
))));
2864 gnu_result
= build_binary_op (ARRAY_REF
, NULL_TREE
,
2865 gnu_result
, gnu_expr
);
2869 gnu_result_type
= get_unpadded_type (Etype (gnat_node
));
2875 Node_Id gnat_range_node
= Discrete_Range (gnat_node
);
2877 gnu_result
= gnat_to_gnu (Prefix (gnat_node
));
2878 gnu_result_type
= get_unpadded_type (Etype (gnat_node
));
2880 /* Do any implicit dereferences of the prefix and do any needed
2882 gnu_result
= maybe_implicit_deref (gnu_result
);
2883 gnu_result
= maybe_unconstrained_array (gnu_result
);
2884 gnu_type
= TREE_TYPE (gnu_result
);
2885 if (Do_Range_Check (gnat_range_node
))
2887 /* Get the bounds of the slice. */
2889 = TYPE_INDEX_TYPE (TYPE_DOMAIN (gnu_result_type
));
2890 tree gnu_min_expr
= TYPE_MIN_VALUE (gnu_index_type
);
2891 tree gnu_max_expr
= TYPE_MAX_VALUE (gnu_index_type
);
2892 tree gnu_expr_l
, gnu_expr_h
, gnu_expr_type
;
2894 /* Check to see that the minimum slice value is in range */
2897 (gnu_result
, gnu_min_expr
,
2898 TYPE_MIN_VALUE (TYPE_INDEX_TYPE (TYPE_DOMAIN (gnu_type
))),
2899 TYPE_MAX_VALUE (TYPE_INDEX_TYPE (TYPE_DOMAIN (gnu_type
))));
2901 /* Check to see that the maximum slice value is in range */
2904 (gnu_result
, gnu_max_expr
,
2905 TYPE_MIN_VALUE (TYPE_INDEX_TYPE (TYPE_DOMAIN (gnu_type
))),
2906 TYPE_MAX_VALUE (TYPE_INDEX_TYPE (TYPE_DOMAIN (gnu_type
))));
2908 /* Derive a good type to convert everything too */
2909 gnu_expr_type
= get_base_type (TREE_TYPE (gnu_expr_l
));
2911 /* Build a compound expression that does the range checks */
2913 = build_binary_op (COMPOUND_EXPR
, gnu_expr_type
,
2914 convert (gnu_expr_type
, gnu_expr_h
),
2915 convert (gnu_expr_type
, gnu_expr_l
));
2917 /* Build a conditional expression that returns the range checks
2918 expression if the slice range is not null (max >= min) or
2919 returns the min if the slice range is null */
2921 = fold (build3 (COND_EXPR
, gnu_expr_type
,
2922 build_binary_op (GE_EXPR
, gnu_expr_type
,
2923 convert (gnu_expr_type
,
2925 convert (gnu_expr_type
,
2927 gnu_expr
, gnu_min_expr
));
2930 gnu_expr
= TYPE_MIN_VALUE (TYPE_DOMAIN (gnu_result_type
));
2932 gnu_result
= build_binary_op (ARRAY_RANGE_REF
, gnu_result_type
,
2933 gnu_result
, gnu_expr
);
2937 case N_Selected_Component
:
2939 tree gnu_prefix
= gnat_to_gnu (Prefix (gnat_node
));
2940 Entity_Id gnat_field
= Entity (Selector_Name (gnat_node
));
2941 Entity_Id gnat_pref_type
= Etype (Prefix (gnat_node
));
2944 while (IN (Ekind (gnat_pref_type
), Incomplete_Or_Private_Kind
)
2945 || IN (Ekind (gnat_pref_type
), Access_Kind
))
2947 if (IN (Ekind (gnat_pref_type
), Incomplete_Or_Private_Kind
))
2948 gnat_pref_type
= Underlying_Type (gnat_pref_type
);
2949 else if (IN (Ekind (gnat_pref_type
), Access_Kind
))
2950 gnat_pref_type
= Designated_Type (gnat_pref_type
);
2953 gnu_prefix
= maybe_implicit_deref (gnu_prefix
);
2955 /* For discriminant references in tagged types always substitute the
2956 corresponding discriminant as the actual selected component. */
2958 if (Is_Tagged_Type (gnat_pref_type
))
2959 while (Present (Corresponding_Discriminant (gnat_field
)))
2960 gnat_field
= Corresponding_Discriminant (gnat_field
);
2962 /* For discriminant references of untagged types always substitute the
2963 corresponding stored discriminant. */
2965 else if (Present (Corresponding_Discriminant (gnat_field
)))
2966 gnat_field
= Original_Record_Component (gnat_field
);
2968 /* Handle extracting the real or imaginary part of a complex.
2969 The real part is the first field and the imaginary the last. */
2971 if (TREE_CODE (TREE_TYPE (gnu_prefix
)) == COMPLEX_TYPE
)
2972 gnu_result
= build_unary_op (Present (Next_Entity (gnat_field
))
2973 ? REALPART_EXPR
: IMAGPART_EXPR
,
2974 NULL_TREE
, gnu_prefix
);
2977 gnu_field
= gnat_to_gnu_field_decl (gnat_field
);
2979 /* If there are discriminants, the prefix might be
2980 evaluated more than once, which is a problem if it has
2982 if (Has_Discriminants (Is_Access_Type (Etype (Prefix (gnat_node
)))
2983 ? Designated_Type (Etype
2984 (Prefix (gnat_node
)))
2985 : Etype (Prefix (gnat_node
))))
2986 gnu_prefix
= gnat_stabilize_reference (gnu_prefix
, 0);
2989 = build_component_ref (gnu_prefix
, NULL_TREE
, gnu_field
,
2990 (Nkind (Parent (gnat_node
))
2991 == N_Attribute_Reference
));
2994 gcc_assert (gnu_result
);
2995 gnu_result_type
= get_unpadded_type (Etype (gnat_node
));
2999 case N_Attribute_Reference
:
3001 /* The attribute designator (like an enumeration value). */
3002 int attribute
= Get_Attribute_Id (Attribute_Name (gnat_node
));
3004 /* The Elab_Spec and Elab_Body attributes are special in that
3005 Prefix is a unit, not an object with a GCC equivalent. Similarly
3006 for Elaborated, since that variable isn't otherwise known. */
3007 if (attribute
== Attr_Elab_Body
|| attribute
== Attr_Elab_Spec
)
3008 return (create_subprog_decl
3009 (create_concat_name (Entity (Prefix (gnat_node
)),
3010 attribute
== Attr_Elab_Body
3011 ? "elabb" : "elabs"),
3012 NULL_TREE
, void_ftype
, NULL_TREE
, false, true, true, NULL
,
3015 gnu_result
= Attribute_to_gnu (gnat_node
, &gnu_result_type
, attribute
);
3020 /* Like 'Access as far as we are concerned. */
3021 gnu_result
= gnat_to_gnu (Prefix (gnat_node
));
3022 gnu_result
= build_unary_op (ADDR_EXPR
, NULL_TREE
, gnu_result
);
3023 gnu_result_type
= get_unpadded_type (Etype (gnat_node
));
3027 case N_Extension_Aggregate
:
3031 /* ??? It is wrong to evaluate the type now, but there doesn't
3032 seem to be any other practical way of doing it. */
3034 gcc_assert (!Expansion_Delayed (gnat_node
));
3036 gnu_aggr_type
= gnu_result_type
3037 = get_unpadded_type (Etype (gnat_node
));
3039 if (TREE_CODE (gnu_result_type
) == RECORD_TYPE
3040 && TYPE_CONTAINS_TEMPLATE_P (gnu_result_type
))
3042 = TREE_TYPE (TREE_CHAIN (TYPE_FIELDS (gnu_result_type
)));
3044 if (Null_Record_Present (gnat_node
))
3045 gnu_result
= gnat_build_constructor (gnu_aggr_type
, NULL_TREE
);
3047 else if (TREE_CODE (gnu_aggr_type
) == UNION_TYPE
3048 && TYPE_UNCHECKED_UNION_P (gnu_aggr_type
))
3050 /* The first element is the discrimant, which we ignore. The
3051 next is the field we're building. Convert the expression
3052 to the type of the field and then to the union type. */
3054 = Next (First (Component_Associations (gnat_node
)));
3055 Entity_Id gnat_field
= Entity (First (Choices (gnat_assoc
)));
3057 = TREE_TYPE (gnat_to_gnu_entity (gnat_field
, NULL_TREE
, 0));
3059 gnu_result
= convert (gnu_field_type
,
3060 gnat_to_gnu (Expression (gnat_assoc
)));
3062 else if (TREE_CODE (gnu_aggr_type
) == RECORD_TYPE
3063 || TREE_CODE (gnu_aggr_type
) == UNION_TYPE
)
3065 = assoc_to_constructor (First (Component_Associations (gnat_node
)),
3067 else if (TREE_CODE (gnu_aggr_type
) == ARRAY_TYPE
)
3068 gnu_result
= pos_to_constructor (First (Expressions (gnat_node
)),
3070 Component_Type (Etype (gnat_node
)));
3071 else if (TREE_CODE (gnu_aggr_type
) == COMPLEX_TYPE
)
3074 (COMPLEX_EXPR
, gnu_aggr_type
,
3075 gnat_to_gnu (Expression (First
3076 (Component_Associations (gnat_node
)))),
3077 gnat_to_gnu (Expression
3079 (First (Component_Associations (gnat_node
))))));
3083 gnu_result
= convert (gnu_result_type
, gnu_result
);
3088 gnu_result
= null_pointer_node
;
3089 gnu_result_type
= get_unpadded_type (Etype (gnat_node
));
3092 case N_Type_Conversion
:
3093 case N_Qualified_Expression
:
3094 /* Get the operand expression. */
3095 gnu_result
= gnat_to_gnu (Expression (gnat_node
));
3096 gnu_result_type
= get_unpadded_type (Etype (gnat_node
));
3099 = convert_with_check (Etype (gnat_node
), gnu_result
,
3100 Do_Overflow_Check (gnat_node
),
3101 Do_Range_Check (Expression (gnat_node
)),
3102 Nkind (gnat_node
) == N_Type_Conversion
3103 && Float_Truncate (gnat_node
));
3106 case N_Unchecked_Type_Conversion
:
3107 gnu_result
= gnat_to_gnu (Expression (gnat_node
));
3108 gnu_result_type
= get_unpadded_type (Etype (gnat_node
));
3110 /* If the result is a pointer type, see if we are improperly
3111 converting to a stricter alignment. */
3113 if (STRICT_ALIGNMENT
&& POINTER_TYPE_P (gnu_result_type
)
3114 && IN (Ekind (Etype (gnat_node
)), Access_Kind
))
3116 unsigned int align
= known_alignment (gnu_result
);
3117 tree gnu_obj_type
= TREE_TYPE (gnu_result_type
);
3118 unsigned int oalign
= TYPE_ALIGN (gnu_obj_type
);
3120 if (align
!= 0 && align
< oalign
&& !TYPE_ALIGN_OK (gnu_obj_type
))
3121 post_error_ne_tree_2
3122 ("?source alignment (^) < alignment of & (^)",
3123 gnat_node
, Designated_Type (Etype (gnat_node
)),
3124 size_int (align
/ BITS_PER_UNIT
), oalign
/ BITS_PER_UNIT
);
3127 gnu_result
= unchecked_convert (gnu_result_type
, gnu_result
,
3128 No_Truncation (gnat_node
));
3134 tree gnu_object
= gnat_to_gnu (Left_Opnd (gnat_node
));
3135 Node_Id gnat_range
= Right_Opnd (gnat_node
);
3139 /* GNAT_RANGE is either an N_Range node or an identifier
3140 denoting a subtype. */
3141 if (Nkind (gnat_range
) == N_Range
)
3143 gnu_low
= gnat_to_gnu (Low_Bound (gnat_range
));
3144 gnu_high
= gnat_to_gnu (High_Bound (gnat_range
));
3146 else if (Nkind (gnat_range
) == N_Identifier
3147 || Nkind (gnat_range
) == N_Expanded_Name
)
3149 tree gnu_range_type
= get_unpadded_type (Entity (gnat_range
));
3151 gnu_low
= TYPE_MIN_VALUE (gnu_range_type
);
3152 gnu_high
= TYPE_MAX_VALUE (gnu_range_type
);
3157 gnu_result_type
= get_unpadded_type (Etype (gnat_node
));
3159 /* If LOW and HIGH are identical, perform an equality test.
3160 Otherwise, ensure that GNU_OBJECT is only evaluated once
3161 and perform a full range test. */
3162 if (operand_equal_p (gnu_low
, gnu_high
, 0))
3163 gnu_result
= build_binary_op (EQ_EXPR
, gnu_result_type
,
3164 gnu_object
, gnu_low
);
3167 gnu_object
= protect_multiple_eval (gnu_object
);
3169 = build_binary_op (TRUTH_ANDIF_EXPR
, gnu_result_type
,
3170 build_binary_op (GE_EXPR
, gnu_result_type
,
3171 gnu_object
, gnu_low
),
3172 build_binary_op (LE_EXPR
, gnu_result_type
,
3173 gnu_object
, gnu_high
));
3176 if (Nkind (gnat_node
) == N_Not_In
)
3177 gnu_result
= invert_truthvalue (gnu_result
);
3182 gnu_lhs
= gnat_to_gnu (Left_Opnd (gnat_node
));
3183 gnu_rhs
= gnat_to_gnu (Right_Opnd (gnat_node
));
3184 gnu_result_type
= get_unpadded_type (Etype (gnat_node
));
3185 gnu_result
= build_binary_op (FLOAT_TYPE_P (gnu_result_type
)
3187 : (Rounded_Result (gnat_node
)
3188 ? ROUND_DIV_EXPR
: TRUNC_DIV_EXPR
),
3189 gnu_result_type
, gnu_lhs
, gnu_rhs
);
3192 case N_Op_Or
: case N_Op_And
: case N_Op_Xor
:
3193 /* These can either be operations on booleans or on modular types.
3194 Fall through for boolean types since that's the way GNU_CODES is
3196 if (IN (Ekind (Underlying_Type (Etype (gnat_node
))),
3197 Modular_Integer_Kind
))
3200 = (Nkind (gnat_node
) == N_Op_Or
? BIT_IOR_EXPR
3201 : Nkind (gnat_node
) == N_Op_And
? BIT_AND_EXPR
3204 gnu_lhs
= gnat_to_gnu (Left_Opnd (gnat_node
));
3205 gnu_rhs
= gnat_to_gnu (Right_Opnd (gnat_node
));
3206 gnu_result_type
= get_unpadded_type (Etype (gnat_node
));
3207 gnu_result
= build_binary_op (code
, gnu_result_type
,
3212 /* ... fall through ... */
3214 case N_Op_Eq
: case N_Op_Ne
: case N_Op_Lt
:
3215 case N_Op_Le
: case N_Op_Gt
: case N_Op_Ge
:
3216 case N_Op_Add
: case N_Op_Subtract
: case N_Op_Multiply
:
3217 case N_Op_Mod
: case N_Op_Rem
:
3218 case N_Op_Rotate_Left
:
3219 case N_Op_Rotate_Right
:
3220 case N_Op_Shift_Left
:
3221 case N_Op_Shift_Right
:
3222 case N_Op_Shift_Right_Arithmetic
:
3223 case N_And_Then
: case N_Or_Else
:
3225 enum tree_code code
= gnu_codes
[Nkind (gnat_node
)];
3228 gnu_lhs
= gnat_to_gnu (Left_Opnd (gnat_node
));
3229 gnu_rhs
= gnat_to_gnu (Right_Opnd (gnat_node
));
3230 gnu_type
= gnu_result_type
= get_unpadded_type (Etype (gnat_node
));
3232 /* If this is a comparison operator, convert any references to
3233 an unconstrained array value into a reference to the
3235 if (TREE_CODE_CLASS (code
) == tcc_comparison
)
3237 gnu_lhs
= maybe_unconstrained_array (gnu_lhs
);
3238 gnu_rhs
= maybe_unconstrained_array (gnu_rhs
);
3241 /* If the result type is a private type, its full view may be a
3242 numeric subtype. The representation we need is that of its base
3243 type, given that it is the result of an arithmetic operation. */
3244 else if (Is_Private_Type (Etype (gnat_node
)))
3245 gnu_type
= gnu_result_type
3246 = get_unpadded_type (Base_Type (Full_View (Etype (gnat_node
))));
3248 /* If this is a shift whose count is not guaranteed to be correct,
3249 we need to adjust the shift count. */
3250 if (IN (Nkind (gnat_node
), N_Op_Shift
)
3251 && !Shift_Count_OK (gnat_node
))
3253 tree gnu_count_type
= get_base_type (TREE_TYPE (gnu_rhs
));
3255 = convert (gnu_count_type
, TYPE_SIZE (gnu_type
));
3257 if (Nkind (gnat_node
) == N_Op_Rotate_Left
3258 || Nkind (gnat_node
) == N_Op_Rotate_Right
)
3259 gnu_rhs
= build_binary_op (TRUNC_MOD_EXPR
, gnu_count_type
,
3260 gnu_rhs
, gnu_max_shift
);
3261 else if (Nkind (gnat_node
) == N_Op_Shift_Right_Arithmetic
)
3264 (MIN_EXPR
, gnu_count_type
,
3265 build_binary_op (MINUS_EXPR
,
3268 convert (gnu_count_type
,
3273 /* For right shifts, the type says what kind of shift to do,
3274 so we may need to choose a different type. */
3275 if (Nkind (gnat_node
) == N_Op_Shift_Right
3276 && !TYPE_UNSIGNED (gnu_type
))
3277 gnu_type
= gnat_unsigned_type (gnu_type
);
3278 else if (Nkind (gnat_node
) == N_Op_Shift_Right_Arithmetic
3279 && TYPE_UNSIGNED (gnu_type
))
3280 gnu_type
= gnat_signed_type (gnu_type
);
3282 if (gnu_type
!= gnu_result_type
)
3284 gnu_lhs
= convert (gnu_type
, gnu_lhs
);
3285 gnu_rhs
= convert (gnu_type
, gnu_rhs
);
3288 gnu_result
= build_binary_op (code
, gnu_type
, gnu_lhs
, gnu_rhs
);
3290 /* If this is a logical shift with the shift count not verified,
3291 we must return zero if it is too large. We cannot compensate
3292 above in this case. */
3293 if ((Nkind (gnat_node
) == N_Op_Shift_Left
3294 || Nkind (gnat_node
) == N_Op_Shift_Right
)
3295 && !Shift_Count_OK (gnat_node
))
3299 build_binary_op (GE_EXPR
, integer_type_node
,
3301 convert (TREE_TYPE (gnu_rhs
),
3302 TYPE_SIZE (gnu_type
))),
3303 convert (gnu_type
, integer_zero_node
),
3308 case N_Conditional_Expression
:
3310 tree gnu_cond
= gnat_to_gnu (First (Expressions (gnat_node
)));
3311 tree gnu_true
= gnat_to_gnu (Next (First (Expressions (gnat_node
))));
3313 = gnat_to_gnu (Next (Next (First (Expressions (gnat_node
)))));
3315 gnu_result_type
= get_unpadded_type (Etype (gnat_node
));
3316 gnu_result
= build_cond_expr (gnu_result_type
,
3317 gnat_truthvalue_conversion (gnu_cond
),
3318 gnu_true
, gnu_false
);
3323 gnu_result
= gnat_to_gnu (Right_Opnd (gnat_node
));
3324 gnu_result_type
= get_unpadded_type (Etype (gnat_node
));
3328 /* This case can apply to a boolean or a modular type.
3329 Fall through for a boolean operand since GNU_CODES is set
3330 up to handle this. */
3331 if (IN (Ekind (Etype (gnat_node
)), Modular_Integer_Kind
))
3333 gnu_expr
= gnat_to_gnu (Right_Opnd (gnat_node
));
3334 gnu_result_type
= get_unpadded_type (Etype (gnat_node
));
3335 gnu_result
= build_unary_op (BIT_NOT_EXPR
, gnu_result_type
,
3340 /* ... fall through ... */
3342 case N_Op_Minus
: case N_Op_Abs
:
3343 gnu_expr
= gnat_to_gnu (Right_Opnd (gnat_node
));
3345 if (Ekind (Etype (gnat_node
)) != E_Private_Type
)
3346 gnu_result_type
= get_unpadded_type (Etype (gnat_node
));
3348 gnu_result_type
= get_unpadded_type (Base_Type
3349 (Full_View (Etype (gnat_node
))));
3351 gnu_result
= build_unary_op (gnu_codes
[Nkind (gnat_node
)],
3352 gnu_result_type
, gnu_expr
);
3359 bool ignore_init_type
= false;
3361 gnat_temp
= Expression (gnat_node
);
3363 /* The Expression operand can either be an N_Identifier or
3364 Expanded_Name, which must represent a type, or a
3365 N_Qualified_Expression, which contains both the object type and an
3366 initial value for the object. */
3367 if (Nkind (gnat_temp
) == N_Identifier
3368 || Nkind (gnat_temp
) == N_Expanded_Name
)
3369 gnu_type
= gnat_to_gnu_type (Entity (gnat_temp
));
3370 else if (Nkind (gnat_temp
) == N_Qualified_Expression
)
3372 Entity_Id gnat_desig_type
3373 = Designated_Type (Underlying_Type (Etype (gnat_node
)));
3375 ignore_init_type
= Has_Constrained_Partial_View (gnat_desig_type
);
3376 gnu_init
= gnat_to_gnu (Expression (gnat_temp
));
3378 gnu_init
= maybe_unconstrained_array (gnu_init
);
3379 if (Do_Range_Check (Expression (gnat_temp
)))
3380 gnu_init
= emit_range_check (gnu_init
, gnat_desig_type
);
3382 if (Is_Elementary_Type (gnat_desig_type
)
3383 || Is_Constrained (gnat_desig_type
))
3385 gnu_type
= gnat_to_gnu_type (gnat_desig_type
);
3386 gnu_init
= convert (gnu_type
, gnu_init
);
3390 gnu_type
= gnat_to_gnu_type (Etype (Expression (gnat_temp
)));
3391 if (TREE_CODE (gnu_type
) == UNCONSTRAINED_ARRAY_TYPE
)
3392 gnu_type
= TREE_TYPE (gnu_init
);
3394 gnu_init
= convert (gnu_type
, gnu_init
);
3400 gnu_result_type
= get_unpadded_type (Etype (gnat_node
));
3401 return build_allocator (gnu_type
, gnu_init
, gnu_result_type
,
3402 Procedure_To_Call (gnat_node
),
3403 Storage_Pool (gnat_node
), gnat_node
,
3408 /***************************/
3409 /* Chapter 5: Statements: */
3410 /***************************/
3413 gnu_result
= build1 (LABEL_EXPR
, void_type_node
,
3414 gnat_to_gnu (Identifier (gnat_node
)));
3417 case N_Null_Statement
:
3418 gnu_result
= alloc_stmt_list ();
3421 case N_Assignment_Statement
:
3422 /* Get the LHS and RHS of the statement and convert any reference to an
3423 unconstrained array into a reference to the underlying array.
3424 If we are not to do range checking and the RHS is an N_Function_Call,
3425 pass the LHS to the call function. */
3426 gnu_lhs
= maybe_unconstrained_array (gnat_to_gnu (Name (gnat_node
)));
3428 /* If the type has a size that overflows, convert this into raise of
3429 Storage_Error: execution shouldn't have gotten here anyway. */
3430 if (TREE_CODE (TYPE_SIZE (TREE_TYPE (gnu_lhs
))) == INTEGER_CST
3431 && TREE_OVERFLOW (TYPE_SIZE (TREE_TYPE (gnu_lhs
))))
3432 gnu_result
= build_call_raise (SE_Object_Too_Large
);
3433 else if (Nkind (Expression (gnat_node
)) == N_Function_Call
3434 && !Do_Range_Check (Expression (gnat_node
)))
3435 gnu_result
= call_to_gnu (Expression (gnat_node
),
3436 &gnu_result_type
, gnu_lhs
);
3440 = maybe_unconstrained_array (gnat_to_gnu (Expression (gnat_node
)));
3442 /* If range check is needed, emit code to generate it */
3443 if (Do_Range_Check (Expression (gnat_node
)))
3444 gnu_rhs
= emit_range_check (gnu_rhs
, Etype (Name (gnat_node
)));
3447 = build_binary_op (MODIFY_EXPR
, NULL_TREE
, gnu_lhs
, gnu_rhs
);
3451 case N_If_Statement
:
3453 tree
*gnu_else_ptr
; /* Point to put next "else if" or "else". */
3455 /* Make the outer COND_EXPR. Avoid non-determinism. */
3456 gnu_result
= build3 (COND_EXPR
, void_type_node
,
3457 gnat_to_gnu (Condition (gnat_node
)),
3458 NULL_TREE
, NULL_TREE
);
3459 COND_EXPR_THEN (gnu_result
)
3460 = build_stmt_group (Then_Statements (gnat_node
), false);
3461 TREE_SIDE_EFFECTS (gnu_result
) = 1;
3462 gnu_else_ptr
= &COND_EXPR_ELSE (gnu_result
);
3464 /* Now make a COND_EXPR for each of the "else if" parts. Put each
3465 into the previous "else" part and point to where to put any
3466 outer "else". Also avoid non-determinism. */
3467 if (Present (Elsif_Parts (gnat_node
)))
3468 for (gnat_temp
= First (Elsif_Parts (gnat_node
));
3469 Present (gnat_temp
); gnat_temp
= Next (gnat_temp
))
3471 gnu_expr
= build3 (COND_EXPR
, void_type_node
,
3472 gnat_to_gnu (Condition (gnat_temp
)),
3473 NULL_TREE
, NULL_TREE
);
3474 COND_EXPR_THEN (gnu_expr
)
3475 = build_stmt_group (Then_Statements (gnat_temp
), false);
3476 TREE_SIDE_EFFECTS (gnu_expr
) = 1;
3477 annotate_with_node (gnu_expr
, gnat_temp
);
3478 *gnu_else_ptr
= gnu_expr
;
3479 gnu_else_ptr
= &COND_EXPR_ELSE (gnu_expr
);
3482 *gnu_else_ptr
= build_stmt_group (Else_Statements (gnat_node
), false);
3486 case N_Case_Statement
:
3487 gnu_result
= Case_Statement_to_gnu (gnat_node
);
3490 case N_Loop_Statement
:
3491 gnu_result
= Loop_Statement_to_gnu (gnat_node
);
3494 case N_Block_Statement
:
3495 start_stmt_group ();
3497 process_decls (Declarations (gnat_node
), Empty
, Empty
, true, true);
3498 add_stmt (gnat_to_gnu (Handled_Statement_Sequence (gnat_node
)));
3500 gnu_result
= end_stmt_group ();
3502 if (Present (Identifier (gnat_node
)))
3503 mark_out_of_scope (Entity (Identifier (gnat_node
)));
3506 case N_Exit_Statement
:
3508 = build2 (EXIT_STMT
, void_type_node
,
3509 (Present (Condition (gnat_node
))
3510 ? gnat_to_gnu (Condition (gnat_node
)) : NULL_TREE
),
3511 (Present (Name (gnat_node
))
3512 ? get_gnu_tree (Entity (Name (gnat_node
)))
3513 : TREE_VALUE (gnu_loop_label_stack
)));
3516 case N_Return_Statement
:
3518 /* The gnu function type of the subprogram currently processed. */
3519 tree gnu_subprog_type
= TREE_TYPE (current_function_decl
);
3520 /* The return value from the subprogram. */
3521 tree gnu_ret_val
= NULL_TREE
;
3522 /* The place to put the return value. */
3524 /* Avoid passing error_mark_node to RETURN_EXPR. */
3525 gnu_result
= NULL_TREE
;
3527 /* If we are dealing with a "return;" from an Ada procedure with
3528 parameters passed by copy in copy out, we need to return a record
3529 containing the final values of these parameters. If the list
3530 contains only one entry, return just that entry.
3532 For a full description of the copy in copy out parameter mechanism,
3533 see the part of the gnat_to_gnu_entity routine dealing with the
3534 translation of subprograms.
3536 But if we have a return label defined, convert this into
3537 a branch to that label. */
3539 if (TREE_VALUE (gnu_return_label_stack
))
3541 gnu_result
= build1 (GOTO_EXPR
, void_type_node
,
3542 TREE_VALUE (gnu_return_label_stack
));
3546 else if (TYPE_CI_CO_LIST (gnu_subprog_type
))
3548 gnu_lhs
= DECL_RESULT (current_function_decl
);
3549 if (list_length (TYPE_CI_CO_LIST (gnu_subprog_type
)) == 1)
3550 gnu_ret_val
= TREE_VALUE (TYPE_CI_CO_LIST (gnu_subprog_type
));
3553 = gnat_build_constructor (TREE_TYPE (gnu_subprog_type
),
3554 TYPE_CI_CO_LIST (gnu_subprog_type
));
3557 /* If the Ada subprogram is a function, we just need to return the
3558 expression. If the subprogram returns an unconstrained
3559 array, we have to allocate a new version of the result and
3560 return it. If we return by reference, return a pointer. */
3562 else if (Present (Expression (gnat_node
)))
3564 /* If the current function returns by target pointer and we
3565 are doing a call, pass that target to the call. */
3566 if (TYPE_RETURNS_BY_TARGET_PTR_P (gnu_subprog_type
)
3567 && Nkind (Expression (gnat_node
)) == N_Function_Call
)
3570 = build_unary_op (INDIRECT_REF
, NULL_TREE
,
3571 DECL_ARGUMENTS (current_function_decl
));
3572 gnu_result
= call_to_gnu (Expression (gnat_node
),
3573 &gnu_result_type
, gnu_lhs
);
3577 gnu_ret_val
= gnat_to_gnu (Expression (gnat_node
));
3579 if (TYPE_RETURNS_BY_TARGET_PTR_P (gnu_subprog_type
))
3580 /* The original return type was unconstrained so dereference
3581 the TARGET pointer in the actual return value's type. */
3583 = build_unary_op (INDIRECT_REF
, TREE_TYPE (gnu_ret_val
),
3584 DECL_ARGUMENTS (current_function_decl
));
3586 gnu_lhs
= DECL_RESULT (current_function_decl
);
3588 /* Do not remove the padding from GNU_RET_VAL if the inner
3589 type is self-referential since we want to allocate the fixed
3590 size in that case. */
3591 if (TREE_CODE (gnu_ret_val
) == COMPONENT_REF
3592 && (TREE_CODE (TREE_TYPE (TREE_OPERAND (gnu_ret_val
, 0)))
3594 && (TYPE_IS_PADDING_P
3595 (TREE_TYPE (TREE_OPERAND (gnu_ret_val
, 0))))
3596 && (CONTAINS_PLACEHOLDER_P
3597 (TYPE_SIZE (TREE_TYPE (gnu_ret_val
)))))
3598 gnu_ret_val
= TREE_OPERAND (gnu_ret_val
, 0);
3600 if (TYPE_RETURNS_BY_REF_P (gnu_subprog_type
)
3601 || By_Ref (gnat_node
))
3603 = build_unary_op (ADDR_EXPR
, NULL_TREE
, gnu_ret_val
);
3605 else if (TYPE_RETURNS_UNCONSTRAINED_P (gnu_subprog_type
))
3607 gnu_ret_val
= maybe_unconstrained_array (gnu_ret_val
);
3609 /* We have two cases: either the function returns with
3610 depressed stack or not. If not, we allocate on the
3611 secondary stack. If so, we allocate in the stack frame.
3612 if no copy is needed, the front end will set By_Ref,
3613 which we handle in the case above. */
3614 if (TYPE_RETURNS_STACK_DEPRESSED (gnu_subprog_type
))
3616 = build_allocator (TREE_TYPE (gnu_ret_val
),
3618 TREE_TYPE (gnu_subprog_type
),
3619 0, -1, gnat_node
, false);
3622 = build_allocator (TREE_TYPE (gnu_ret_val
),
3624 TREE_TYPE (gnu_subprog_type
),
3625 Procedure_To_Call (gnat_node
),
3626 Storage_Pool (gnat_node
),
3633 gnu_result
= build2 (MODIFY_EXPR
, TREE_TYPE (gnu_ret_val
),
3634 gnu_lhs
, gnu_ret_val
);
3636 if (TYPE_RETURNS_BY_TARGET_PTR_P (gnu_subprog_type
))
3638 add_stmt_with_node (gnu_result
, gnat_node
);
3639 gnu_result
= NULL_TREE
;
3642 gnu_result
= build1 (RETURN_EXPR
, void_type_node
, gnu_result
);
3646 case N_Goto_Statement
:
3647 gnu_result
= build1 (GOTO_EXPR
, void_type_node
,
3648 gnat_to_gnu (Name (gnat_node
)));
3651 /****************************/
3652 /* Chapter 6: Subprograms: */
3653 /****************************/
3655 case N_Subprogram_Declaration
:
3656 /* Unless there is a freeze node, declare the subprogram. We consider
3657 this a "definition" even though we're not generating code for
3658 the subprogram because we will be making the corresponding GCC
3661 if (No (Freeze_Node (Defining_Entity (Specification (gnat_node
)))))
3662 gnat_to_gnu_entity (Defining_Entity (Specification (gnat_node
)),
3664 gnu_result
= alloc_stmt_list ();
3667 case N_Abstract_Subprogram_Declaration
:
3668 /* This subprogram doesn't exist for code generation purposes, but we
3669 have to elaborate the types of any parameters, unless they are
3670 imported types (nothing to generate in this case). */
3672 = First_Formal (Defining_Entity (Specification (gnat_node
)));
3673 Present (gnat_temp
);
3674 gnat_temp
= Next_Formal_With_Extras (gnat_temp
))
3675 if (Is_Itype (Etype (gnat_temp
))
3676 && !From_With_Type (Etype (gnat_temp
)))
3677 gnat_to_gnu_entity (Etype (gnat_temp
), NULL_TREE
, 0);
3679 gnu_result
= alloc_stmt_list ();
3682 case N_Defining_Program_Unit_Name
:
3683 /* For a child unit identifier go up a level to get the
3684 specification. We get this when we try to find the spec of
3685 a child unit package that is the compilation unit being compiled. */
3686 gnu_result
= gnat_to_gnu (Parent (gnat_node
));
3689 case N_Subprogram_Body
:
3690 Subprogram_Body_to_gnu (gnat_node
);
3691 gnu_result
= alloc_stmt_list ();
3694 case N_Function_Call
:
3695 case N_Procedure_Call_Statement
:
3696 gnu_result
= call_to_gnu (gnat_node
, &gnu_result_type
, NULL_TREE
);
3699 /*************************/
3700 /* Chapter 7: Packages: */
3701 /*************************/
3703 case N_Package_Declaration
:
3704 gnu_result
= gnat_to_gnu (Specification (gnat_node
));
3707 case N_Package_Specification
:
3709 start_stmt_group ();
3710 process_decls (Visible_Declarations (gnat_node
),
3711 Private_Declarations (gnat_node
), Empty
, true, true);
3712 gnu_result
= end_stmt_group ();
3715 case N_Package_Body
:
3717 /* If this is the body of a generic package - do nothing */
3718 if (Ekind (Corresponding_Spec (gnat_node
)) == E_Generic_Package
)
3720 gnu_result
= alloc_stmt_list ();
3724 start_stmt_group ();
3725 process_decls (Declarations (gnat_node
), Empty
, Empty
, true, true);
3727 if (Present (Handled_Statement_Sequence (gnat_node
)))
3728 add_stmt (gnat_to_gnu (Handled_Statement_Sequence (gnat_node
)));
3730 gnu_result
= end_stmt_group ();
3733 /*********************************/
3734 /* Chapter 8: Visibility Rules: */
3735 /*********************************/
3737 case N_Use_Package_Clause
:
3738 case N_Use_Type_Clause
:
3739 /* Nothing to do here - but these may appear in list of declarations */
3740 gnu_result
= alloc_stmt_list ();
3743 /***********************/
3744 /* Chapter 9: Tasks: */
3745 /***********************/
3747 case N_Protected_Type_Declaration
:
3748 gnu_result
= alloc_stmt_list ();
3751 case N_Single_Task_Declaration
:
3752 gnat_to_gnu_entity (Defining_Entity (gnat_node
), NULL_TREE
, 1);
3753 gnu_result
= alloc_stmt_list ();
3756 /***********************************************************/
3757 /* Chapter 10: Program Structure and Compilation Issues: */
3758 /***********************************************************/
3760 case N_Compilation_Unit
:
3762 /* This is not called for the main unit, which is handled in function
3764 start_stmt_group ();
3767 Compilation_Unit_to_gnu (gnat_node
);
3768 gnu_result
= alloc_stmt_list ();
3771 case N_Subprogram_Body_Stub
:
3772 case N_Package_Body_Stub
:
3773 case N_Protected_Body_Stub
:
3774 case N_Task_Body_Stub
:
3775 /* Simply process whatever unit is being inserted. */
3776 gnu_result
= gnat_to_gnu (Unit (Library_Unit (gnat_node
)));
3780 gnu_result
= gnat_to_gnu (Proper_Body (gnat_node
));
3783 /***************************/
3784 /* Chapter 11: Exceptions: */
3785 /***************************/
3787 case N_Handled_Sequence_Of_Statements
:
3788 /* If there is an At_End procedure attached to this node, and the EH
3789 mechanism is SJLJ, we must have at least a corresponding At_End
3790 handler, unless the No_Exception_Handlers restriction is set. */
3791 gcc_assert (type_annotate_only
3792 || Exception_Mechanism
!= Setjmp_Longjmp
3793 || No (At_End_Proc (gnat_node
))
3794 || Present (Exception_Handlers (gnat_node
))
3795 || No_Exception_Handlers_Set ());
3797 gnu_result
= Handled_Sequence_Of_Statements_to_gnu (gnat_node
);
3800 case N_Exception_Handler
:
3801 if (Exception_Mechanism
== Setjmp_Longjmp
)
3802 gnu_result
= Exception_Handler_to_gnu_sjlj (gnat_node
);
3803 else if (Exception_Mechanism
== GCC_ZCX
)
3804 gnu_result
= Exception_Handler_to_gnu_zcx (gnat_node
);
3810 /*******************************/
3811 /* Chapter 12: Generic Units: */
3812 /*******************************/
3814 case N_Generic_Function_Renaming_Declaration
:
3815 case N_Generic_Package_Renaming_Declaration
:
3816 case N_Generic_Procedure_Renaming_Declaration
:
3817 case N_Generic_Package_Declaration
:
3818 case N_Generic_Subprogram_Declaration
:
3819 case N_Package_Instantiation
:
3820 case N_Procedure_Instantiation
:
3821 case N_Function_Instantiation
:
3822 /* These nodes can appear on a declaration list but there is nothing to
3823 to be done with them. */
3824 gnu_result
= alloc_stmt_list ();
3827 /***************************************************/
3828 /* Chapter 13: Representation Clauses and */
3829 /* Implementation-Dependent Features: */
3830 /***************************************************/
3832 case N_Attribute_Definition_Clause
:
3834 gnu_result
= alloc_stmt_list ();
3836 /* The only one we need deal with is for 'Address. For the others, SEM
3837 puts the information elsewhere. We need only deal with 'Address
3838 if the object has a Freeze_Node (which it never will currently). */
3839 if (Get_Attribute_Id (Chars (gnat_node
)) != Attr_Address
3840 || No (Freeze_Node (Entity (Name (gnat_node
)))))
3843 /* Get the value to use as the address and save it as the
3844 equivalent for GNAT_TEMP. When the object is frozen,
3845 gnat_to_gnu_entity will do the right thing. */
3846 save_gnu_tree (Entity (Name (gnat_node
)),
3847 gnat_to_gnu (Expression (gnat_node
)), true);
3850 case N_Enumeration_Representation_Clause
:
3851 case N_Record_Representation_Clause
:
3853 /* We do nothing with these. SEM puts the information elsewhere. */
3854 gnu_result
= alloc_stmt_list ();
3857 case N_Code_Statement
:
3858 if (!type_annotate_only
)
3860 tree gnu_template
= gnat_to_gnu (Asm_Template (gnat_node
));
3861 tree gnu_input_list
= NULL_TREE
, gnu_output_list
= NULL_TREE
;
3862 tree gnu_clobber_list
= NULL_TREE
;
3865 /* First process inputs, then outputs, then clobbers. */
3866 Setup_Asm_Inputs (gnat_node
);
3867 while (Present (gnat_temp
= Asm_Input_Value ()))
3869 tree gnu_value
= gnat_to_gnu (gnat_temp
);
3870 tree gnu_constr
= build_tree_list (NULL_TREE
, gnat_to_gnu
3871 (Asm_Input_Constraint ()));
3874 = tree_cons (gnu_constr
, gnu_value
, gnu_input_list
);
3878 Setup_Asm_Outputs (gnat_node
);
3879 while (Present (gnat_temp
= Asm_Output_Variable ()))
3881 tree gnu_value
= gnat_to_gnu (gnat_temp
);
3882 tree gnu_constr
= build_tree_list (NULL_TREE
, gnat_to_gnu
3883 (Asm_Output_Constraint ()));
3886 = tree_cons (gnu_constr
, gnu_value
, gnu_output_list
);
3890 Clobber_Setup (gnat_node
);
3891 while ((clobber
= Clobber_Get_Next ()))
3893 = tree_cons (NULL_TREE
,
3894 build_string (strlen (clobber
) + 1, clobber
),
3897 gnu_input_list
= nreverse (gnu_input_list
);
3898 gnu_output_list
= nreverse (gnu_output_list
);
3899 gnu_result
= build4 (ASM_EXPR
, void_type_node
,
3900 gnu_template
, gnu_output_list
,
3901 gnu_input_list
, gnu_clobber_list
);
3902 ASM_VOLATILE_P (gnu_result
) = Is_Asm_Volatile (gnat_node
);
3905 gnu_result
= alloc_stmt_list ();
3909 /***************************************************/
3911 /***************************************************/
3913 case N_Freeze_Entity
:
3914 start_stmt_group ();
3915 process_freeze_entity (gnat_node
);
3916 process_decls (Actions (gnat_node
), Empty
, Empty
, true, true);
3917 gnu_result
= end_stmt_group ();
3920 case N_Itype_Reference
:
3921 if (!present_gnu_tree (Itype (gnat_node
)))
3922 process_type (Itype (gnat_node
));
3924 gnu_result
= alloc_stmt_list ();
3927 case N_Free_Statement
:
3928 if (!type_annotate_only
)
3930 tree gnu_ptr
= gnat_to_gnu (Expression (gnat_node
));
3935 /* If this is a thin pointer, we must dereference it to create
3936 a fat pointer, then go back below to a thin pointer. The
3937 reason for this is that we need a fat pointer someplace in
3938 order to properly compute the size. */
3939 if (TYPE_THIN_POINTER_P (TREE_TYPE (gnu_ptr
)))
3940 gnu_ptr
= build_unary_op (ADDR_EXPR
, NULL_TREE
,
3941 build_unary_op (INDIRECT_REF
, NULL_TREE
,
3944 /* If this is an unconstrained array, we know the object must
3945 have been allocated with the template in front of the object.
3946 So pass the template address, but get the total size. Do this
3947 by converting to a thin pointer. */
3948 if (TYPE_FAT_POINTER_P (TREE_TYPE (gnu_ptr
)))
3950 = convert (build_pointer_type
3951 (TYPE_OBJECT_RECORD_TYPE
3952 (TYPE_UNCONSTRAINED_ARRAY (TREE_TYPE (gnu_ptr
)))),
3955 gnu_obj_type
= TREE_TYPE (TREE_TYPE (gnu_ptr
));
3956 gnu_obj_size
= TYPE_SIZE_UNIT (gnu_obj_type
);
3957 align
= TYPE_ALIGN (gnu_obj_type
);
3959 if (TREE_CODE (gnu_obj_type
) == RECORD_TYPE
3960 && TYPE_CONTAINS_TEMPLATE_P (gnu_obj_type
))
3962 tree gnu_char_ptr_type
= build_pointer_type (char_type_node
);
3963 tree gnu_pos
= byte_position (TYPE_FIELDS (gnu_obj_type
));
3964 tree gnu_byte_offset
3965 = convert (gnu_char_ptr_type
,
3966 size_diffop (size_zero_node
, gnu_pos
));
3968 gnu_ptr
= convert (gnu_char_ptr_type
, gnu_ptr
);
3969 gnu_ptr
= build_binary_op (MINUS_EXPR
, gnu_char_ptr_type
,
3970 gnu_ptr
, gnu_byte_offset
);
3973 gnu_result
= build_call_alloc_dealloc (gnu_ptr
, gnu_obj_size
, align
,
3974 Procedure_To_Call (gnat_node
),
3975 Storage_Pool (gnat_node
),
3980 case N_Raise_Constraint_Error
:
3981 case N_Raise_Program_Error
:
3982 case N_Raise_Storage_Error
:
3983 if (type_annotate_only
)
3985 gnu_result
= alloc_stmt_list ();
3989 gnu_result_type
= get_unpadded_type (Etype (gnat_node
));
3990 gnu_result
= build_call_raise (UI_To_Int (Reason (gnat_node
)));
3992 /* If the type is VOID, this is a statement, so we need to
3993 generate the code for the call. Handle a Condition, if there
3995 if (TREE_CODE (gnu_result_type
) == VOID_TYPE
)
3997 annotate_with_node (gnu_result
, gnat_node
);
3999 if (Present (Condition (gnat_node
)))
4000 gnu_result
= build3 (COND_EXPR
, void_type_node
,
4001 gnat_to_gnu (Condition (gnat_node
)),
4002 gnu_result
, alloc_stmt_list ());
4005 gnu_result
= build1 (NULL_EXPR
, gnu_result_type
, gnu_result
);
4008 case N_Validate_Unchecked_Conversion
:
4009 /* If the result is a pointer type, see if we are either converting
4010 from a non-pointer or from a pointer to a type with a different
4011 alias set and warn if so. If the result defined in the same unit as
4012 this unchecked conversion, we can allow this because we can know to
4013 make that type have alias set 0. */
4015 tree gnu_source_type
= gnat_to_gnu_type (Source_Type (gnat_node
));
4016 tree gnu_target_type
= gnat_to_gnu_type (Target_Type (gnat_node
));
4018 if (POINTER_TYPE_P (gnu_target_type
)
4019 && !In_Same_Source_Unit (Target_Type (gnat_node
), gnat_node
)
4020 && get_alias_set (TREE_TYPE (gnu_target_type
)) != 0
4021 && !No_Strict_Aliasing (Underlying_Type (Target_Type (gnat_node
)))
4022 && (!POINTER_TYPE_P (gnu_source_type
)
4023 || (get_alias_set (TREE_TYPE (gnu_source_type
))
4024 != get_alias_set (TREE_TYPE (gnu_target_type
)))))
4027 ("?possible aliasing problem for type&",
4028 gnat_node
, Target_Type (gnat_node
));
4030 ("\\?use -fno-strict-aliasing switch for references",
4033 ("\\?or use `pragma No_Strict_Aliasing (&);`",
4034 gnat_node
, Target_Type (gnat_node
));
4037 /* The No_Strict_Aliasing flag is not propagated to the back-end for
4038 fat pointers so unconditionally warn in problematic cases. */
4039 else if (TYPE_FAT_POINTER_P (gnu_target_type
))
4042 = TREE_TYPE (TREE_TYPE (TYPE_FIELDS (gnu_target_type
)));
4044 if (get_alias_set (array_type
) != 0
4045 && (!TYPE_FAT_POINTER_P (gnu_source_type
)
4046 || (get_alias_set (TREE_TYPE (TREE_TYPE (TYPE_FIELDS (gnu_source_type
))))
4047 != get_alias_set (array_type
))))
4050 ("?possible aliasing problem for type&",
4051 gnat_node
, Target_Type (gnat_node
));
4053 ("\\?use -fno-strict-aliasing switch for references",
4058 gnu_result
= alloc_stmt_list ();
4061 case N_Raise_Statement
:
4062 case N_Function_Specification
:
4063 case N_Procedure_Specification
:
4065 case N_Component_Association
:
4068 gcc_assert (type_annotate_only
);
4069 gnu_result
= alloc_stmt_list ();
4072 /* If we pushed our level as part of processing the elaboration routine,
4074 if (went_into_elab_proc
)
4076 add_stmt (gnu_result
);
4078 gnu_result
= end_stmt_group ();
4079 current_function_decl
= NULL_TREE
;
4082 /* Set the location information into the result. Note that we may have
4083 no result if we tried to build a CALL_EXPR node to a procedure with
4084 no side-effects and optimization is enabled. */
4085 if (gnu_result
&& EXPR_P (gnu_result
))
4086 annotate_with_node (gnu_result
, gnat_node
);
4088 /* If we're supposed to return something of void_type, it means we have
4089 something we're elaborating for effect, so just return. */
4090 if (TREE_CODE (gnu_result_type
) == VOID_TYPE
)
4093 /* If the result is a constant that overflows, raise constraint error. */
4094 else if (TREE_CODE (gnu_result
) == INTEGER_CST
4095 && TREE_CONSTANT_OVERFLOW (gnu_result
))
4097 post_error ("Constraint_Error will be raised at run-time?", gnat_node
);
4100 = build1 (NULL_EXPR
, gnu_result_type
,
4101 build_call_raise (CE_Overflow_Check_Failed
));
4104 /* If our result has side-effects and is of an unconstrained type,
4105 make a SAVE_EXPR so that we can be sure it will only be referenced
4106 once. Note we must do this before any conversions. */
4107 if (TREE_SIDE_EFFECTS (gnu_result
)
4108 && (TREE_CODE (gnu_result_type
) == UNCONSTRAINED_ARRAY_TYPE
4109 || CONTAINS_PLACEHOLDER_P (TYPE_SIZE (gnu_result_type
))))
4110 gnu_result
= gnat_stabilize_reference (gnu_result
, 0);
4112 /* Now convert the result to the proper type. If the type is void or if
4113 we have no result, return error_mark_node to show we have no result.
4114 If the type of the result is correct or if we have a label (which doesn't
4115 have any well-defined type), return our result. Also don't do the
4116 conversion if the "desired" type involves a PLACEHOLDER_EXPR in its size
4117 since those are the cases where the front end may have the type wrong due
4118 to "instantiating" the unconstrained record with discriminant values
4119 or if this is a FIELD_DECL. If this is the Name of an assignment
4120 statement or a parameter of a procedure call, return what we have since
4121 the RHS has to be converted to our type there in that case, unless
4122 GNU_RESULT_TYPE has a simpler size. Similarly, if the two types are
4123 record types with the same name, the expression type has integral mode,
4124 and GNU_RESULT_TYPE BLKmode, don't convert. This will be the case when
4125 we are converting from a packable type to its actual type and we need
4126 those conversions to be NOPs in order for assignments into these types to
4127 work properly if the inner object is a bitfield and hence can't have
4128 its address taken. Finally, don't convert integral types that are the
4129 operand of an unchecked conversion since we need to ignore those
4130 conversions (for 'Valid). Otherwise, convert the result to the proper
4133 if (Present (Parent (gnat_node
))
4134 && ((Nkind (Parent (gnat_node
)) == N_Assignment_Statement
4135 && Name (Parent (gnat_node
)) == gnat_node
)
4136 || (Nkind (Parent (gnat_node
)) == N_Procedure_Call_Statement
4137 && Name (Parent (gnat_node
)) != gnat_node
)
4138 || (Nkind (Parent (gnat_node
)) == N_Unchecked_Type_Conversion
4139 && !AGGREGATE_TYPE_P (gnu_result_type
)
4140 && !AGGREGATE_TYPE_P (TREE_TYPE (gnu_result
)))
4141 || Nkind (Parent (gnat_node
)) == N_Parameter_Association
)
4142 && !(TYPE_SIZE (gnu_result_type
)
4143 && TYPE_SIZE (TREE_TYPE (gnu_result
))
4144 && (AGGREGATE_TYPE_P (gnu_result_type
)
4145 == AGGREGATE_TYPE_P (TREE_TYPE (gnu_result
)))
4146 && ((TREE_CODE (TYPE_SIZE (gnu_result_type
)) == INTEGER_CST
4147 && (TREE_CODE (TYPE_SIZE (TREE_TYPE (gnu_result
)))
4149 || (TREE_CODE (TYPE_SIZE (gnu_result_type
)) != INTEGER_CST
4150 && !CONTAINS_PLACEHOLDER_P (TYPE_SIZE (gnu_result_type
))
4151 && (CONTAINS_PLACEHOLDER_P
4152 (TYPE_SIZE (TREE_TYPE (gnu_result
))))))
4153 && !(TREE_CODE (gnu_result_type
) == RECORD_TYPE
4154 && TYPE_JUSTIFIED_MODULAR_P (gnu_result_type
))))
4156 /* In this case remove padding only if the inner object is of
4157 self-referential size: in that case it must be an object of
4158 unconstrained type with a default discriminant. In other cases,
4159 we want to avoid copying too much data. */
4160 if (TREE_CODE (TREE_TYPE (gnu_result
)) == RECORD_TYPE
4161 && TYPE_IS_PADDING_P (TREE_TYPE (gnu_result
))
4162 && CONTAINS_PLACEHOLDER_P (TYPE_SIZE
4163 (TREE_TYPE (TYPE_FIELDS
4164 (TREE_TYPE (gnu_result
))))))
4165 gnu_result
= convert (TREE_TYPE (TYPE_FIELDS (TREE_TYPE (gnu_result
))),
4169 else if (TREE_CODE (gnu_result
) == LABEL_DECL
4170 || TREE_CODE (gnu_result
) == FIELD_DECL
4171 || TREE_CODE (gnu_result
) == ERROR_MARK
4172 || (TYPE_SIZE (gnu_result_type
)
4173 && TREE_CODE (TYPE_SIZE (gnu_result_type
)) != INTEGER_CST
4174 && TREE_CODE (gnu_result
) != INDIRECT_REF
4175 && CONTAINS_PLACEHOLDER_P (TYPE_SIZE (gnu_result_type
)))
4176 || ((TYPE_NAME (gnu_result_type
)
4177 == TYPE_NAME (TREE_TYPE (gnu_result
)))
4178 && TREE_CODE (gnu_result_type
) == RECORD_TYPE
4179 && TREE_CODE (TREE_TYPE (gnu_result
)) == RECORD_TYPE
4180 && TYPE_MODE (gnu_result_type
) == BLKmode
4181 && (GET_MODE_CLASS (TYPE_MODE (TREE_TYPE (gnu_result
)))
4184 /* Remove any padding record, but do nothing more in this case. */
4185 if (TREE_CODE (TREE_TYPE (gnu_result
)) == RECORD_TYPE
4186 && TYPE_IS_PADDING_P (TREE_TYPE (gnu_result
)))
4187 gnu_result
= convert (TREE_TYPE (TYPE_FIELDS (TREE_TYPE (gnu_result
))),
4191 else if (gnu_result
== error_mark_node
4192 || gnu_result_type
== void_type_node
)
4193 gnu_result
= error_mark_node
;
4194 else if (gnu_result_type
!= TREE_TYPE (gnu_result
))
4195 gnu_result
= convert (gnu_result_type
, gnu_result
);
4197 /* We don't need any NOP_EXPR or NON_LVALUE_EXPR on GNU_RESULT. */
4198 while ((TREE_CODE (gnu_result
) == NOP_EXPR
4199 || TREE_CODE (gnu_result
) == NON_LVALUE_EXPR
)
4200 && TREE_TYPE (TREE_OPERAND (gnu_result
, 0)) == TREE_TYPE (gnu_result
))
4201 gnu_result
= TREE_OPERAND (gnu_result
, 0);
4206 /* Record the current code position in GNAT_NODE. */
4209 record_code_position (Node_Id gnat_node
)
4211 tree stmt_stmt
= build1 (STMT_STMT
, void_type_node
, NULL_TREE
);
4213 add_stmt_with_node (stmt_stmt
, gnat_node
);
4214 save_gnu_tree (gnat_node
, stmt_stmt
, true);
4217 /* Insert the code for GNAT_NODE at the position saved for that node. */
4220 insert_code_for (Node_Id gnat_node
)
4222 STMT_STMT_STMT (get_gnu_tree (gnat_node
)) = gnat_to_gnu (gnat_node
);
4223 save_gnu_tree (gnat_node
, NULL_TREE
, true);
4226 /* Start a new statement group chained to the previous group. */
4231 struct stmt_group
*group
= stmt_group_free_list
;
4233 /* First see if we can get one from the free list. */
4235 stmt_group_free_list
= group
->previous
;
4237 group
= (struct stmt_group
*) ggc_alloc (sizeof (struct stmt_group
));
4239 group
->previous
= current_stmt_group
;
4240 group
->stmt_list
= group
->block
= group
->cleanups
= NULL_TREE
;
4241 current_stmt_group
= group
;
4244 /* Add GNU_STMT to the current statement group. */
4247 add_stmt (tree gnu_stmt
)
4249 append_to_statement_list (gnu_stmt
, ¤t_stmt_group
->stmt_list
);
4251 /* If we're at top level, show everything in here is in use in case
4252 any of it is shared by a subprogram. */
4253 if (global_bindings_p ())
4254 walk_tree (&gnu_stmt
, mark_visited
, NULL
, NULL
);
4258 /* Similar, but set the location of GNU_STMT to that of GNAT_NODE. */
4261 add_stmt_with_node (tree gnu_stmt
, Node_Id gnat_node
)
4263 if (Present (gnat_node
))
4264 annotate_with_node (gnu_stmt
, gnat_node
);
4265 add_stmt (gnu_stmt
);
4268 /* Add a declaration statement for GNU_DECL to the current statement group.
4269 Get SLOC from Entity_Id. */
4272 add_decl_expr (tree gnu_decl
, Entity_Id gnat_entity
)
4276 /* If this is a variable that Gigi is to ignore, we may have been given
4277 an ERROR_MARK. So test for it. We also might have been given a
4278 reference for a renaming. So only do something for a decl. Also
4279 ignore a TYPE_DECL for an UNCONSTRAINED_ARRAY_TYPE. */
4280 if (!DECL_P (gnu_decl
)
4281 || (TREE_CODE (gnu_decl
) == TYPE_DECL
4282 && TREE_CODE (TREE_TYPE (gnu_decl
)) == UNCONSTRAINED_ARRAY_TYPE
))
4285 /* If we are global, we don't want to actually output the DECL_EXPR for
4286 this decl since we already have evaluated the expressions in the
4287 sizes and positions as globals and doing it again would be wrong.
4288 But we do have to mark everything as used. */
4289 gnu_stmt
= build1 (DECL_EXPR
, void_type_node
, gnu_decl
);
4290 if (!global_bindings_p ())
4291 add_stmt_with_node (gnu_stmt
, gnat_entity
);
4294 walk_tree (&gnu_stmt
, mark_visited
, NULL
, NULL
);
4295 if (TREE_CODE (gnu_decl
) == VAR_DECL
4296 || TREE_CODE (gnu_decl
) == CONST_DECL
)
4298 walk_tree (&DECL_SIZE (gnu_decl
), mark_visited
, NULL
, NULL
);
4299 walk_tree (&DECL_SIZE_UNIT (gnu_decl
), mark_visited
, NULL
, NULL
);
4300 walk_tree (&DECL_INITIAL (gnu_decl
), mark_visited
, NULL
, NULL
);
4304 /* If this is a DECL_EXPR for a variable with DECL_INITIAL set,
4305 there are two cases we need to handle here. */
4306 if (TREE_CODE (gnu_decl
) == VAR_DECL
&& DECL_INITIAL (gnu_decl
))
4308 tree gnu_init
= DECL_INITIAL (gnu_decl
);
4309 tree gnu_lhs
= NULL_TREE
;
4311 /* If this is a DECL_EXPR for a variable with DECL_INITIAL set
4312 and decl has a padded type, convert it to the unpadded type so the
4313 assignment is done properly. */
4314 if (TREE_CODE (TREE_TYPE (gnu_decl
)) == RECORD_TYPE
4315 && TYPE_IS_PADDING_P (TREE_TYPE (gnu_decl
)))
4317 = convert (TREE_TYPE (TYPE_FIELDS (TREE_TYPE (gnu_decl
))), gnu_decl
);
4319 /* Otherwise, if this is going into memory and the initializer isn't
4320 valid for the assembler and loader. Gimplification could do this,
4321 but would be run too late if -fno-unit-at-a-time. */
4322 else if (TREE_STATIC (gnu_decl
)
4323 && !initializer_constant_valid_p (gnu_init
,
4324 TREE_TYPE (gnu_decl
)))
4329 tree gnu_assign_stmt
4330 = build_binary_op (MODIFY_EXPR
, NULL_TREE
,
4331 gnu_lhs
, DECL_INITIAL (gnu_decl
));
4333 DECL_INITIAL (gnu_decl
) = 0;
4334 TREE_READONLY (gnu_decl
) = 0;
4335 annotate_with_locus (gnu_assign_stmt
,
4336 DECL_SOURCE_LOCATION (gnu_decl
));
4337 add_stmt (gnu_assign_stmt
);
4342 /* Utility function to mark nodes with TREE_VISITED and types as having their
4343 sized gimplified. Called from walk_tree. We use this to indicate all
4344 variable sizes and positions in global types may not be shared by any
4348 mark_visited (tree
*tp
, int *walk_subtrees
, void *data ATTRIBUTE_UNUSED
)
4350 if (TREE_VISITED (*tp
))
4353 /* Don't mark a dummy type as visited because we want to mark its sizes
4354 and fields once it's filled in. */
4355 else if (!TYPE_IS_DUMMY_P (*tp
))
4356 TREE_VISITED (*tp
) = 1;
4359 TYPE_SIZES_GIMPLIFIED (*tp
) = 1;
4364 /* Likewise, but to mark as unvisited. */
4367 mark_unvisited (tree
*tp
, int *walk_subtrees ATTRIBUTE_UNUSED
,
4368 void *data ATTRIBUTE_UNUSED
)
4370 TREE_VISITED (*tp
) = 0;
4375 /* Add GNU_CLEANUP, a cleanup action, to the current code group. */
4378 add_cleanup (tree gnu_cleanup
)
4380 append_to_statement_list (gnu_cleanup
, ¤t_stmt_group
->cleanups
);
4383 /* Set the BLOCK node corresponding to the current code group to GNU_BLOCK. */
4386 set_block_for_group (tree gnu_block
)
4388 gcc_assert (!current_stmt_group
->block
);
4389 current_stmt_group
->block
= gnu_block
;
4392 /* Return code corresponding to the current code group. It is normally
4393 a STATEMENT_LIST, but may also be a BIND_EXPR or TRY_FINALLY_EXPR if
4394 BLOCK or cleanups were set. */
4399 struct stmt_group
*group
= current_stmt_group
;
4400 tree gnu_retval
= group
->stmt_list
;
4402 /* If this is a null list, allocate a new STATEMENT_LIST. Then, if there
4403 are cleanups, make a TRY_FINALLY_EXPR. Last, if there is a BLOCK,
4404 make a BIND_EXPR. Note that we nest in that because the cleanup may
4405 reference variables in the block. */
4406 if (gnu_retval
== NULL_TREE
)
4407 gnu_retval
= alloc_stmt_list ();
4409 if (group
->cleanups
)
4410 gnu_retval
= build2 (TRY_FINALLY_EXPR
, void_type_node
, gnu_retval
,
4413 if (current_stmt_group
->block
)
4414 gnu_retval
= build3 (BIND_EXPR
, void_type_node
, BLOCK_VARS (group
->block
),
4415 gnu_retval
, group
->block
);
4417 /* Remove this group from the stack and add it to the free list. */
4418 current_stmt_group
= group
->previous
;
4419 group
->previous
= stmt_group_free_list
;
4420 stmt_group_free_list
= group
;
4425 /* Add a list of statements from GNAT_LIST, a possibly-empty list of
4429 add_stmt_list (List_Id gnat_list
)
4433 if (Present (gnat_list
))
4434 for (gnat_node
= First (gnat_list
); Present (gnat_node
);
4435 gnat_node
= Next (gnat_node
))
4436 add_stmt (gnat_to_gnu (gnat_node
));
4439 /* Build a tree from GNAT_LIST, a possibly-empty list of statements.
4440 If BINDING_P is true, push and pop a binding level around the list. */
4443 build_stmt_group (List_Id gnat_list
, bool binding_p
)
4445 start_stmt_group ();
4449 add_stmt_list (gnat_list
);
4453 return end_stmt_group ();
4456 /* Push and pop routines for stacks. We keep a free list around so we
4457 don't waste tree nodes. */
4460 push_stack (tree
*gnu_stack_ptr
, tree gnu_purpose
, tree gnu_value
)
4462 tree gnu_node
= gnu_stack_free_list
;
4466 gnu_stack_free_list
= TREE_CHAIN (gnu_node
);
4467 TREE_CHAIN (gnu_node
) = *gnu_stack_ptr
;
4468 TREE_PURPOSE (gnu_node
) = gnu_purpose
;
4469 TREE_VALUE (gnu_node
) = gnu_value
;
4472 gnu_node
= tree_cons (gnu_purpose
, gnu_value
, *gnu_stack_ptr
);
4474 *gnu_stack_ptr
= gnu_node
;
4478 pop_stack (tree
*gnu_stack_ptr
)
4480 tree gnu_node
= *gnu_stack_ptr
;
4482 *gnu_stack_ptr
= TREE_CHAIN (gnu_node
);
4483 TREE_CHAIN (gnu_node
) = gnu_stack_free_list
;
4484 gnu_stack_free_list
= gnu_node
;
4487 /* GNU_STMT is a statement. We generate code for that statement. */
4490 gnat_expand_stmt (tree gnu_stmt
)
4493 tree gnu_elmt
, gnu_elmt_2
;
4496 switch (TREE_CODE (gnu_stmt
))
4500 /* First write a volatile ASM_INPUT to prevent anything from being
4502 gnu_elmt
= gen_rtx_ASM_INPUT (VOIDmode
, "");
4503 MEM_VOLATILE_P (gnu_elmt
) = 1;
4504 emit_insn (gnu_elmt
);
4506 gnu_elmt
= expand_expr (TREE_OPERAND (gnu_stmt
, 0), NULL_RTX
, VOIDmode
,
4508 emit_insn (gen_rtx_USE (VOIDmode
, ));
4517 /* Generate GIMPLE in place for the expression at *EXPR_P. */
4520 gnat_gimplify_expr (tree
*expr_p
, tree
*pre_p
, tree
*post_p ATTRIBUTE_UNUSED
)
4522 tree expr
= *expr_p
;
4524 if (IS_ADA_STMT (expr
))
4525 return gnat_gimplify_stmt (expr_p
);
4527 switch (TREE_CODE (expr
))
4530 /* If this is for a scalar, just make a VAR_DECL for it. If for
4531 an aggregate, get a null pointer of the appropriate type and
4533 if (AGGREGATE_TYPE_P (TREE_TYPE (expr
)))
4534 *expr_p
= build1 (INDIRECT_REF
, TREE_TYPE (expr
),
4535 convert (build_pointer_type (TREE_TYPE (expr
)),
4536 integer_zero_node
));
4539 *expr_p
= create_tmp_var (TREE_TYPE (expr
), NULL
);
4540 TREE_NO_WARNING (*expr_p
) = 1;
4543 append_to_statement_list (TREE_OPERAND (expr
, 0), pre_p
);
4546 case UNCONSTRAINED_ARRAY_REF
:
4547 /* We should only do this if we are just elaborating for side-effects,
4548 but we can't know that yet. */
4549 *expr_p
= TREE_OPERAND (*expr_p
, 0);
4553 /* If we're taking the address of a constant CONSTRUCTOR, force it to
4554 be put into static memory. We know it's going to be readonly given
4555 the semantics we have and it's required to be static memory in
4556 the case when the reference is in an elaboration procedure. */
4557 if (TREE_CODE (TREE_OPERAND (expr
, 0)) == CONSTRUCTOR
4558 && TREE_CONSTANT (TREE_OPERAND (expr
, 0)))
4561 = create_tmp_var (TREE_TYPE (TREE_OPERAND (expr
, 0)), "C");
4563 TREE_READONLY (new_var
) = 1;
4564 TREE_STATIC (new_var
) = 1;
4565 TREE_ADDRESSABLE (new_var
) = 1;
4566 DECL_INITIAL (new_var
) = TREE_OPERAND (expr
, 0);
4568 TREE_OPERAND (expr
, 0) = new_var
;
4569 recompute_tree_invarant_for_addr_expr (expr
);
4572 return GS_UNHANDLED
;
4575 /* We have a kludge here. If the FIELD_DECL is from a fat pointer and is
4576 from an early dummy type, replace it with the proper FIELD_DECL. */
4577 if (TYPE_FAT_POINTER_P (TREE_TYPE (TREE_OPERAND (*expr_p
, 0)))
4578 && DECL_ORIGINAL_FIELD (TREE_OPERAND (*expr_p
, 1)))
4580 TREE_OPERAND (*expr_p
, 1)
4581 = DECL_ORIGINAL_FIELD (TREE_OPERAND (*expr_p
, 1));
4585 /* ... fall through ... */
4588 return GS_UNHANDLED
;
4592 /* Generate GIMPLE in place for the statement at *STMT_P. */
4594 static enum gimplify_status
4595 gnat_gimplify_stmt (tree
*stmt_p
)
4597 tree stmt
= *stmt_p
;
4599 switch (TREE_CODE (stmt
))
4602 *stmt_p
= STMT_STMT_STMT (stmt
);
4606 *stmt_p
= NULL_TREE
;
4611 tree gnu_start_label
= create_artificial_label ();
4612 tree gnu_end_label
= LOOP_STMT_LABEL (stmt
);
4614 /* Set to emit the statements of the loop. */
4615 *stmt_p
= NULL_TREE
;
4617 /* We first emit the start label and then a conditional jump to
4618 the end label if there's a top condition, then the body of the
4619 loop, then a conditional branch to the end label, then the update,
4620 if any, and finally a jump to the start label and the definition
4621 of the end label. */
4622 append_to_statement_list (build1 (LABEL_EXPR
, void_type_node
,
4626 if (LOOP_STMT_TOP_COND (stmt
))
4627 append_to_statement_list (build3 (COND_EXPR
, void_type_node
,
4628 LOOP_STMT_TOP_COND (stmt
),
4635 append_to_statement_list (LOOP_STMT_BODY (stmt
), stmt_p
);
4637 if (LOOP_STMT_BOT_COND (stmt
))
4638 append_to_statement_list (build3 (COND_EXPR
, void_type_node
,
4639 LOOP_STMT_BOT_COND (stmt
),
4646 if (LOOP_STMT_UPDATE (stmt
))
4647 append_to_statement_list (LOOP_STMT_UPDATE (stmt
), stmt_p
);
4649 append_to_statement_list (build1 (GOTO_EXPR
, void_type_node
,
4652 append_to_statement_list (build1 (LABEL_EXPR
, void_type_node
,
4659 /* Build a statement to jump to the corresponding end label, then
4660 see if it needs to be conditional. */
4661 *stmt_p
= build1 (GOTO_EXPR
, void_type_node
, EXIT_STMT_LABEL (stmt
));
4662 if (EXIT_STMT_COND (stmt
))
4663 *stmt_p
= build3 (COND_EXPR
, void_type_node
,
4664 EXIT_STMT_COND (stmt
), *stmt_p
, alloc_stmt_list ());
4672 /* Force references to each of the entities in packages GNAT_NODE with's
4673 so that the debugging information for all of them are identical
4674 in all clients. Operate recursively on anything it with's, but check
4675 that we aren't elaborating something more than once. */
4677 /* The reason for this routine's existence is two-fold.
4678 First, with some debugging formats, notably MDEBUG on SGI
4679 IRIX, the linker will remove duplicate debugging information if two
4680 clients have identical debugguing information. With the normal scheme
4681 of elaboration, this does not usually occur, since entities in with'ed
4682 packages are elaborated on demand, and if clients have different usage
4683 patterns, the normal case, then the order and selection of entities
4684 will differ. In most cases however, it seems that linkers do not know
4685 how to eliminate duplicate debugging information, even if it is
4686 identical, so the use of this routine would increase the total amount
4687 of debugging information in the final executable.
4689 Second, this routine is called in type_annotate mode, to compute DDA
4690 information for types in withed units, for ASIS use */
4693 elaborate_all_entities (Node_Id gnat_node
)
4695 Entity_Id gnat_with_clause
, gnat_entity
;
4697 /* Process each unit only once. As we trace the context of all relevant
4698 units transitively, including generic bodies, we may encounter the
4699 same generic unit repeatedly */
4701 if (!present_gnu_tree (gnat_node
))
4702 save_gnu_tree (gnat_node
, integer_zero_node
, true);
4704 /* Save entities in all context units. A body may have an implicit_with
4705 on its own spec, if the context includes a child unit, so don't save
4708 for (gnat_with_clause
= First (Context_Items (gnat_node
));
4709 Present (gnat_with_clause
);
4710 gnat_with_clause
= Next (gnat_with_clause
))
4711 if (Nkind (gnat_with_clause
) == N_With_Clause
4712 && !present_gnu_tree (Library_Unit (gnat_with_clause
))
4713 && Library_Unit (gnat_with_clause
) != Library_Unit (Cunit (Main_Unit
)))
4715 elaborate_all_entities (Library_Unit (gnat_with_clause
));
4717 if (Ekind (Entity (Name (gnat_with_clause
))) == E_Package
)
4719 for (gnat_entity
= First_Entity (Entity (Name (gnat_with_clause
)));
4720 Present (gnat_entity
);
4721 gnat_entity
= Next_Entity (gnat_entity
))
4722 if (Is_Public (gnat_entity
)
4723 && Convention (gnat_entity
) != Convention_Intrinsic
4724 && Ekind (gnat_entity
) != E_Package
4725 && Ekind (gnat_entity
) != E_Package_Body
4726 && Ekind (gnat_entity
) != E_Operator
4727 && !(IN (Ekind (gnat_entity
), Type_Kind
)
4728 && !Is_Frozen (gnat_entity
))
4729 && !((Ekind (gnat_entity
) == E_Procedure
4730 || Ekind (gnat_entity
) == E_Function
)
4731 && Is_Intrinsic_Subprogram (gnat_entity
))
4732 && !IN (Ekind (gnat_entity
), Named_Kind
)
4733 && !IN (Ekind (gnat_entity
), Generic_Unit_Kind
))
4734 gnat_to_gnu_entity (gnat_entity
, NULL_TREE
, 0);
4736 else if (Ekind (Entity (Name (gnat_with_clause
))) == E_Generic_Package
)
4739 = Corresponding_Body (Unit (Library_Unit (gnat_with_clause
)));
4741 /* Retrieve compilation unit node of generic body. */
4742 while (Present (gnat_body
)
4743 && Nkind (gnat_body
) != N_Compilation_Unit
)
4744 gnat_body
= Parent (gnat_body
);
4746 /* If body is available, elaborate its context. */
4747 if (Present (gnat_body
))
4748 elaborate_all_entities (gnat_body
);
4752 if (Nkind (Unit (gnat_node
)) == N_Package_Body
&& type_annotate_only
)
4753 elaborate_all_entities (Library_Unit (gnat_node
));
4756 /* Do the processing of N_Freeze_Entity, GNAT_NODE. */
4759 process_freeze_entity (Node_Id gnat_node
)
4761 Entity_Id gnat_entity
= Entity (gnat_node
);
4765 = (Nkind (Declaration_Node (gnat_entity
)) == N_Object_Declaration
4766 && present_gnu_tree (Declaration_Node (gnat_entity
)))
4767 ? get_gnu_tree (Declaration_Node (gnat_entity
)) : NULL_TREE
;
4769 /* If this is a package, need to generate code for the package. */
4770 if (Ekind (gnat_entity
) == E_Package
)
4773 (Parent (Corresponding_Body
4774 (Parent (Declaration_Node (gnat_entity
)))));
4778 /* Check for old definition after the above call. This Freeze_Node
4779 might be for one its Itypes. */
4781 = present_gnu_tree (gnat_entity
) ? get_gnu_tree (gnat_entity
) : 0;
4783 /* If this entity has an Address representation clause, GNU_OLD is the
4784 address, so discard it here. */
4785 if (Present (Address_Clause (gnat_entity
)))
4788 /* Don't do anything for class-wide types they are always
4789 transformed into their root type. */
4790 if (Ekind (gnat_entity
) == E_Class_Wide_Type
4791 || (Ekind (gnat_entity
) == E_Class_Wide_Subtype
4792 && Present (Equivalent_Type (gnat_entity
))))
4795 /* Don't do anything for subprograms that may have been elaborated before
4796 their freeze nodes. This can happen, for example because of an inner call
4797 in an instance body, or a previous compilation of a spec for inlining
4800 && TREE_CODE (gnu_old
) == FUNCTION_DECL
4801 && (Ekind (gnat_entity
) == E_Function
4802 || Ekind (gnat_entity
) == E_Procedure
))
4804 && (TREE_CODE (TREE_TYPE (gnu_old
)) == FUNCTION_TYPE
4805 && Ekind (gnat_entity
) == E_Subprogram_Type
)))
4808 /* If we have a non-dummy type old tree, we have nothing to do. Unless
4809 this is the public view of a private type whose full view was not
4810 delayed, this node was never delayed as it should have been.
4811 Also allow this to happen for concurrent types since we may have
4812 frozen both the Corresponding_Record_Type and this type. */
4814 && !(TREE_CODE (gnu_old
) == TYPE_DECL
4815 && TYPE_IS_DUMMY_P (TREE_TYPE (gnu_old
))))
4817 gcc_assert ((IN (Ekind (gnat_entity
), Incomplete_Or_Private_Kind
)
4818 && Present (Full_View (gnat_entity
))
4819 && No (Freeze_Node (Full_View (gnat_entity
))))
4820 || Is_Concurrent_Type (gnat_entity
));
4824 /* Reset the saved tree, if any, and elaborate the object or type for real.
4825 If there is a full declaration, elaborate it and copy the type to
4826 GNAT_ENTITY. Likewise if this is the record subtype corresponding to
4827 a class wide type or subtype. */
4830 save_gnu_tree (gnat_entity
, NULL_TREE
, false);
4831 if (IN (Ekind (gnat_entity
), Incomplete_Or_Private_Kind
)
4832 && Present (Full_View (gnat_entity
))
4833 && present_gnu_tree (Full_View (gnat_entity
)))
4834 save_gnu_tree (Full_View (gnat_entity
), NULL_TREE
, false);
4835 if (Present (Class_Wide_Type (gnat_entity
))
4836 && Class_Wide_Type (gnat_entity
) != gnat_entity
)
4837 save_gnu_tree (Class_Wide_Type (gnat_entity
), NULL_TREE
, false);
4840 if (IN (Ekind (gnat_entity
), Incomplete_Or_Private_Kind
)
4841 && Present (Full_View (gnat_entity
)))
4843 gnu_new
= gnat_to_gnu_entity (Full_View (gnat_entity
), NULL_TREE
, 1);
4845 /* Propagate back-annotations from full view to partial view. */
4846 if (Unknown_Alignment (gnat_entity
))
4847 Set_Alignment (gnat_entity
, Alignment (Full_View (gnat_entity
)));
4849 if (Unknown_Esize (gnat_entity
))
4850 Set_Esize (gnat_entity
, Esize (Full_View (gnat_entity
)));
4852 if (Unknown_RM_Size (gnat_entity
))
4853 Set_RM_Size (gnat_entity
, RM_Size (Full_View (gnat_entity
)));
4855 /* The above call may have defined this entity (the simplest example
4856 of this is when we have a private enumeral type since the bounds
4857 will have the public view. */
4858 if (!present_gnu_tree (gnat_entity
))
4859 save_gnu_tree (gnat_entity
, gnu_new
, false);
4860 if (Present (Class_Wide_Type (gnat_entity
))
4861 && Class_Wide_Type (gnat_entity
) != gnat_entity
)
4862 save_gnu_tree (Class_Wide_Type (gnat_entity
), gnu_new
, false);
4865 gnu_new
= gnat_to_gnu_entity (gnat_entity
, gnu_init
, 1);
4867 /* If we've made any pointers to the old version of this type, we
4868 have to update them. */
4870 update_pointer_to (TYPE_MAIN_VARIANT (TREE_TYPE (gnu_old
)),
4871 TREE_TYPE (gnu_new
));
4874 /* Process the list of inlined subprograms of GNAT_NODE, which is an
4875 N_Compilation_Unit. */
4878 process_inlined_subprograms (Node_Id gnat_node
)
4880 Entity_Id gnat_entity
;
4883 /* If we can inline, generate RTL for all the inlined subprograms.
4884 Define the entity first so we set DECL_EXTERNAL. */
4885 if (optimize
> 0 && !flag_really_no_inline
)
4886 for (gnat_entity
= First_Inlined_Subprogram (gnat_node
);
4887 Present (gnat_entity
);
4888 gnat_entity
= Next_Inlined_Subprogram (gnat_entity
))
4890 gnat_body
= Parent (Declaration_Node (gnat_entity
));
4892 if (Nkind (gnat_body
) != N_Subprogram_Body
)
4894 /* ??? This really should always be Present. */
4895 if (No (Corresponding_Body (gnat_body
)))
4899 = Parent (Declaration_Node (Corresponding_Body (gnat_body
)));
4902 if (Present (gnat_body
))
4904 gnat_to_gnu_entity (gnat_entity
, NULL_TREE
, 0);
4905 add_stmt (gnat_to_gnu (gnat_body
));
4910 /* Elaborate decls in the lists GNAT_DECLS and GNAT_DECLS2, if present.
4911 We make two passes, one to elaborate anything other than bodies (but
4912 we declare a function if there was no spec). The second pass
4913 elaborates the bodies.
4915 GNAT_END_LIST gives the element in the list past the end. Normally,
4916 this is Empty, but can be First_Real_Statement for a
4917 Handled_Sequence_Of_Statements.
4919 We make a complete pass through both lists if PASS1P is true, then make
4920 the second pass over both lists if PASS2P is true. The lists usually
4921 correspond to the public and private parts of a package. */
4924 process_decls (List_Id gnat_decls
, List_Id gnat_decls2
,
4925 Node_Id gnat_end_list
, bool pass1p
, bool pass2p
)
4927 List_Id gnat_decl_array
[2];
4931 gnat_decl_array
[0] = gnat_decls
, gnat_decl_array
[1] = gnat_decls2
;
4934 for (i
= 0; i
<= 1; i
++)
4935 if (Present (gnat_decl_array
[i
]))
4936 for (gnat_decl
= First (gnat_decl_array
[i
]);
4937 gnat_decl
!= gnat_end_list
; gnat_decl
= Next (gnat_decl
))
4939 /* For package specs, we recurse inside the declarations,
4940 thus taking the two pass approach inside the boundary. */
4941 if (Nkind (gnat_decl
) == N_Package_Declaration
4942 && (Nkind (Specification (gnat_decl
)
4943 == N_Package_Specification
)))
4944 process_decls (Visible_Declarations (Specification (gnat_decl
)),
4945 Private_Declarations (Specification (gnat_decl
)),
4946 Empty
, true, false);
4948 /* Similarly for any declarations in the actions of a
4950 else if (Nkind (gnat_decl
) == N_Freeze_Entity
)
4952 process_freeze_entity (gnat_decl
);
4953 process_decls (Actions (gnat_decl
), Empty
, Empty
, true, false);
4956 /* Package bodies with freeze nodes get their elaboration deferred
4957 until the freeze node, but the code must be placed in the right
4958 place, so record the code position now. */
4959 else if (Nkind (gnat_decl
) == N_Package_Body
4960 && Present (Freeze_Node (Corresponding_Spec (gnat_decl
))))
4961 record_code_position (gnat_decl
);
4963 else if (Nkind (gnat_decl
) == N_Package_Body_Stub
4964 && Present (Library_Unit (gnat_decl
))
4965 && Present (Freeze_Node
4968 (Library_Unit (gnat_decl
)))))))
4969 record_code_position
4970 (Proper_Body (Unit (Library_Unit (gnat_decl
))));
4972 /* We defer most subprogram bodies to the second pass. */
4973 else if (Nkind (gnat_decl
) == N_Subprogram_Body
)
4975 if (Acts_As_Spec (gnat_decl
))
4977 Node_Id gnat_subprog_id
= Defining_Entity (gnat_decl
);
4979 if (Ekind (gnat_subprog_id
) != E_Generic_Procedure
4980 && Ekind (gnat_subprog_id
) != E_Generic_Function
)
4981 gnat_to_gnu_entity (gnat_subprog_id
, NULL_TREE
, 1);
4984 /* For bodies and stubs that act as their own specs, the entity
4985 itself must be elaborated in the first pass, because it may
4986 be used in other declarations. */
4987 else if (Nkind (gnat_decl
) == N_Subprogram_Body_Stub
)
4989 Node_Id gnat_subprog_id
=
4990 Defining_Entity (Specification (gnat_decl
));
4992 if (Ekind (gnat_subprog_id
) != E_Subprogram_Body
4993 && Ekind (gnat_subprog_id
) != E_Generic_Procedure
4994 && Ekind (gnat_subprog_id
) != E_Generic_Function
)
4995 gnat_to_gnu_entity (gnat_subprog_id
, NULL_TREE
, 1);
4998 /* Concurrent stubs stand for the corresponding subprogram bodies,
4999 which are deferred like other bodies. */
5000 else if (Nkind (gnat_decl
) == N_Task_Body_Stub
5001 || Nkind (gnat_decl
) == N_Protected_Body_Stub
)
5004 add_stmt (gnat_to_gnu (gnat_decl
));
5007 /* Here we elaborate everything we deferred above except for package bodies,
5008 which are elaborated at their freeze nodes. Note that we must also
5009 go inside things (package specs and freeze nodes) the first pass did. */
5011 for (i
= 0; i
<= 1; i
++)
5012 if (Present (gnat_decl_array
[i
]))
5013 for (gnat_decl
= First (gnat_decl_array
[i
]);
5014 gnat_decl
!= gnat_end_list
; gnat_decl
= Next (gnat_decl
))
5016 if (Nkind (gnat_decl
) == N_Subprogram_Body
5017 || Nkind (gnat_decl
) == N_Subprogram_Body_Stub
5018 || Nkind (gnat_decl
) == N_Task_Body_Stub
5019 || Nkind (gnat_decl
) == N_Protected_Body_Stub
)
5020 add_stmt (gnat_to_gnu (gnat_decl
));
5022 else if (Nkind (gnat_decl
) == N_Package_Declaration
5023 && (Nkind (Specification (gnat_decl
)
5024 == N_Package_Specification
)))
5025 process_decls (Visible_Declarations (Specification (gnat_decl
)),
5026 Private_Declarations (Specification (gnat_decl
)),
5027 Empty
, false, true);
5029 else if (Nkind (gnat_decl
) == N_Freeze_Entity
)
5030 process_decls (Actions (gnat_decl
), Empty
, Empty
, false, true);
5034 /* Emit code for a range check. GNU_EXPR is the expression to be checked,
5035 GNAT_RANGE_TYPE the gnat type or subtype containing the bounds against
5036 which we have to check. */
5039 emit_range_check (tree gnu_expr
, Entity_Id gnat_range_type
)
5041 tree gnu_range_type
= get_unpadded_type (gnat_range_type
);
5042 tree gnu_low
= TYPE_MIN_VALUE (gnu_range_type
);
5043 tree gnu_high
= TYPE_MAX_VALUE (gnu_range_type
);
5044 tree gnu_compare_type
= get_base_type (TREE_TYPE (gnu_expr
));
5046 /* If GNU_EXPR has an integral type that is narrower than GNU_RANGE_TYPE,
5047 we can't do anything since we might be truncating the bounds. No
5048 check is needed in this case. */
5049 if (INTEGRAL_TYPE_P (TREE_TYPE (gnu_expr
))
5050 && (TYPE_PRECISION (gnu_compare_type
)
5051 < TYPE_PRECISION (get_base_type (gnu_range_type
))))
5054 /* Checked expressions must be evaluated only once. */
5055 gnu_expr
= protect_multiple_eval (gnu_expr
);
5057 /* There's no good type to use here, so we might as well use
5058 integer_type_node. Note that the form of the check is
5059 (not (expr >= lo)) or (not (expr >= hi))
5060 the reason for this slightly convoluted form is that NaN's
5061 are not considered to be in range in the float case. */
5063 (build_binary_op (TRUTH_ORIF_EXPR
, integer_type_node
,
5065 (build_binary_op (GE_EXPR
, integer_type_node
,
5066 convert (gnu_compare_type
, gnu_expr
),
5067 convert (gnu_compare_type
, gnu_low
))),
5069 (build_binary_op (LE_EXPR
, integer_type_node
,
5070 convert (gnu_compare_type
, gnu_expr
),
5071 convert (gnu_compare_type
,
5073 gnu_expr
, CE_Range_Check_Failed
);
5076 /* Emit code for an index check. GNU_ARRAY_OBJECT is the array object
5077 which we are about to index, GNU_EXPR is the index expression to be
5078 checked, GNU_LOW and GNU_HIGH are the lower and upper bounds
5079 against which GNU_EXPR has to be checked. Note that for index
5080 checking we cannot use the emit_range_check function (although very
5081 similar code needs to be generated in both cases) since for index
5082 checking the array type against which we are checking the indeces
5083 may be unconstrained and consequently we need to retrieve the
5084 actual index bounds from the array object itself
5085 (GNU_ARRAY_OBJECT). The place where we need to do that is in
5086 subprograms having unconstrained array formal parameters */
5089 emit_index_check (tree gnu_array_object
,
5094 tree gnu_expr_check
;
5096 /* Checked expressions must be evaluated only once. */
5097 gnu_expr
= protect_multiple_eval (gnu_expr
);
5099 /* Must do this computation in the base type in case the expression's
5100 type is an unsigned subtypes. */
5101 gnu_expr_check
= convert (get_base_type (TREE_TYPE (gnu_expr
)), gnu_expr
);
5103 /* If GNU_LOW or GNU_HIGH are a PLACEHOLDER_EXPR, qualify them by
5104 the object we are handling. */
5105 gnu_low
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (gnu_low
, gnu_array_object
);
5106 gnu_high
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (gnu_high
, gnu_array_object
);
5108 /* There's no good type to use here, so we might as well use
5109 integer_type_node. */
5111 (build_binary_op (TRUTH_ORIF_EXPR
, integer_type_node
,
5112 build_binary_op (LT_EXPR
, integer_type_node
,
5114 convert (TREE_TYPE (gnu_expr_check
),
5116 build_binary_op (GT_EXPR
, integer_type_node
,
5118 convert (TREE_TYPE (gnu_expr_check
),
5120 gnu_expr
, CE_Index_Check_Failed
);
5123 /* GNU_COND contains the condition corresponding to an access, discriminant or
5124 range check of value GNU_EXPR. Build a COND_EXPR that returns GNU_EXPR if
5125 GNU_COND is false and raises a CONSTRAINT_ERROR if GNU_COND is true.
5126 REASON is the code that says why the exception was raised. */
5129 emit_check (tree gnu_cond
, tree gnu_expr
, int reason
)
5134 gnu_call
= build_call_raise (reason
);
5136 /* Use an outer COMPOUND_EXPR to make sure that GNU_EXPR will get evaluated
5137 in front of the comparison in case it ends up being a SAVE_EXPR. Put the
5138 whole thing inside its own SAVE_EXPR so the inner SAVE_EXPR doesn't leak
5140 gnu_result
= fold (build3 (COND_EXPR
, TREE_TYPE (gnu_expr
), gnu_cond
,
5141 build2 (COMPOUND_EXPR
, TREE_TYPE (gnu_expr
),
5142 gnu_call
, gnu_expr
),
5145 /* If GNU_EXPR has side effects, make the outer COMPOUND_EXPR and
5146 protect it. Otherwise, show GNU_RESULT has no side effects: we
5147 don't need to evaluate it just for the check. */
5148 if (TREE_SIDE_EFFECTS (gnu_expr
))
5150 = build2 (COMPOUND_EXPR
, TREE_TYPE (gnu_expr
), gnu_expr
, gnu_result
);
5152 TREE_SIDE_EFFECTS (gnu_result
) = 0;
5154 /* ??? Unfortunately, if we don't put a SAVE_EXPR around this whole thing,
5155 we will repeatedly do the test. It would be nice if GCC was able
5156 to optimize this and only do it once. */
5157 return save_expr (gnu_result
);
5160 /* Return an expression that converts GNU_EXPR to GNAT_TYPE, doing
5161 overflow checks if OVERFLOW_P is nonzero and range checks if
5162 RANGE_P is nonzero. GNAT_TYPE is known to be an integral type.
5163 If TRUNCATE_P is nonzero, do a float to integer conversion with
5164 truncation; otherwise round. */
5167 convert_with_check (Entity_Id gnat_type
, tree gnu_expr
, bool overflowp
,
5168 bool rangep
, bool truncatep
)
5170 tree gnu_type
= get_unpadded_type (gnat_type
);
5171 tree gnu_in_type
= TREE_TYPE (gnu_expr
);
5172 tree gnu_in_basetype
= get_base_type (gnu_in_type
);
5173 tree gnu_base_type
= get_base_type (gnu_type
);
5174 tree gnu_ada_base_type
= get_ada_base_type (gnu_type
);
5175 tree gnu_result
= gnu_expr
;
5177 /* If we are not doing any checks, the output is an integral type, and
5178 the input is not a floating type, just do the conversion. This
5179 shortcut is required to avoid problems with packed array types
5180 and simplifies code in all cases anyway. */
5181 if (!rangep
&& !overflowp
&& INTEGRAL_TYPE_P (gnu_base_type
)
5182 && !FLOAT_TYPE_P (gnu_in_type
))
5183 return convert (gnu_type
, gnu_expr
);
5185 /* First convert the expression to its base type. This
5186 will never generate code, but makes the tests below much simpler.
5187 But don't do this if converting from an integer type to an unconstrained
5188 array type since then we need to get the bounds from the original
5190 if (TREE_CODE (gnu_type
) != UNCONSTRAINED_ARRAY_TYPE
)
5191 gnu_result
= convert (gnu_in_basetype
, gnu_result
);
5193 /* If overflow checks are requested, we need to be sure the result will
5194 fit in the output base type. But don't do this if the input
5195 is integer and the output floating-point. */
5197 && !(FLOAT_TYPE_P (gnu_base_type
) && INTEGRAL_TYPE_P (gnu_in_basetype
)))
5199 /* Ensure GNU_EXPR only gets evaluated once. */
5200 tree gnu_input
= protect_multiple_eval (gnu_result
);
5201 tree gnu_cond
= integer_zero_node
;
5202 tree gnu_in_lb
= TYPE_MIN_VALUE (gnu_in_basetype
);
5203 tree gnu_in_ub
= TYPE_MAX_VALUE (gnu_in_basetype
);
5204 tree gnu_out_lb
= TYPE_MIN_VALUE (gnu_base_type
);
5205 tree gnu_out_ub
= TYPE_MAX_VALUE (gnu_base_type
);
5207 /* Convert the lower bounds to signed types, so we're sure we're
5208 comparing them properly. Likewise, convert the upper bounds
5209 to unsigned types. */
5210 if (INTEGRAL_TYPE_P (gnu_in_basetype
) && TYPE_UNSIGNED (gnu_in_basetype
))
5211 gnu_in_lb
= convert (gnat_signed_type (gnu_in_basetype
), gnu_in_lb
);
5213 if (INTEGRAL_TYPE_P (gnu_in_basetype
)
5214 && !TYPE_UNSIGNED (gnu_in_basetype
))
5215 gnu_in_ub
= convert (gnat_unsigned_type (gnu_in_basetype
), gnu_in_ub
);
5217 if (INTEGRAL_TYPE_P (gnu_base_type
) && TYPE_UNSIGNED (gnu_base_type
))
5218 gnu_out_lb
= convert (gnat_signed_type (gnu_base_type
), gnu_out_lb
);
5220 if (INTEGRAL_TYPE_P (gnu_base_type
) && !TYPE_UNSIGNED (gnu_base_type
))
5221 gnu_out_ub
= convert (gnat_unsigned_type (gnu_base_type
), gnu_out_ub
);
5223 /* Check each bound separately and only if the result bound
5224 is tighter than the bound on the input type. Note that all the
5225 types are base types, so the bounds must be constant. Also,
5226 the comparison is done in the base type of the input, which
5227 always has the proper signedness. First check for input
5228 integer (which means output integer), output float (which means
5229 both float), or mixed, in which case we always compare.
5230 Note that we have to do the comparison which would *fail* in the
5231 case of an error since if it's an FP comparison and one of the
5232 values is a NaN or Inf, the comparison will fail. */
5233 if (INTEGRAL_TYPE_P (gnu_in_basetype
)
5234 ? tree_int_cst_lt (gnu_in_lb
, gnu_out_lb
)
5235 : (FLOAT_TYPE_P (gnu_base_type
)
5236 ? REAL_VALUES_LESS (TREE_REAL_CST (gnu_in_lb
),
5237 TREE_REAL_CST (gnu_out_lb
))
5241 (build_binary_op (GE_EXPR
, integer_type_node
,
5242 gnu_input
, convert (gnu_in_basetype
,
5245 if (INTEGRAL_TYPE_P (gnu_in_basetype
)
5246 ? tree_int_cst_lt (gnu_out_ub
, gnu_in_ub
)
5247 : (FLOAT_TYPE_P (gnu_base_type
)
5248 ? REAL_VALUES_LESS (TREE_REAL_CST (gnu_out_ub
),
5249 TREE_REAL_CST (gnu_in_lb
))
5252 = build_binary_op (TRUTH_ORIF_EXPR
, integer_type_node
, gnu_cond
,
5254 (build_binary_op (LE_EXPR
, integer_type_node
,
5256 convert (gnu_in_basetype
,
5259 if (!integer_zerop (gnu_cond
))
5260 gnu_result
= emit_check (gnu_cond
, gnu_input
,
5261 CE_Overflow_Check_Failed
);
5264 /* Now convert to the result base type. If this is a non-truncating
5265 float-to-integer conversion, round. */
5266 if (INTEGRAL_TYPE_P (gnu_ada_base_type
) && FLOAT_TYPE_P (gnu_in_basetype
)
5269 REAL_VALUE_TYPE half_minus_pred_half
, pred_half
;
5270 tree gnu_conv
, gnu_zero
, gnu_comp
, gnu_saved_result
, calc_type
;
5271 tree gnu_pred_half
, gnu_add_pred_half
, gnu_subtract_pred_half
;
5272 const struct real_format
*fmt
;
5274 /* The following calculations depend on proper rounding to even
5275 of each arithmetic operation. In order to prevent excess
5276 precision from spoiling this property, use the widest hardware
5277 floating-point type.
5279 FIXME: For maximum efficiency, this should only be done for machines
5280 and types where intermediates may have extra precision. */
5282 calc_type
= longest_float_type_node
;
5283 /* FIXME: Should not have padding in the first place */
5284 if (TREE_CODE (calc_type
) == RECORD_TYPE
5285 && TYPE_IS_PADDING_P (calc_type
))
5286 calc_type
= TREE_TYPE (TYPE_FIELDS (calc_type
));
5288 /* Compute the exact value calc_type'Pred (0.5) at compile time. */
5289 fmt
= REAL_MODE_FORMAT (TYPE_MODE (calc_type
));
5290 real_2expN (&half_minus_pred_half
, -(fmt
->p
) - 1);
5291 REAL_ARITHMETIC (pred_half
, MINUS_EXPR
, dconsthalf
,
5292 half_minus_pred_half
);
5293 gnu_pred_half
= build_real (calc_type
, pred_half
);
5295 /* If the input is strictly negative, subtract this value
5296 and otherwise add it from the input. For 0.5, the result
5297 is exactly between 1.0 and the machine number preceding 1.0
5298 (for calc_type). Since the last bit of 1.0 is even, this 0.5
5299 will round to 1.0, while all other number with an absolute
5300 value less than 0.5 round to 0.0. For larger numbers exactly
5301 halfway between integers, rounding will always be correct as
5302 the true mathematical result will be closer to the higher
5303 integer compared to the lower one. So, this constant works
5304 for all floating-point numbers.
5306 The reason to use the same constant with subtract/add instead
5307 of a positive and negative constant is to allow the comparison
5308 to be scheduled in parallel with retrieval of the constant and
5309 conversion of the input to the calc_type (if necessary).
5312 gnu_zero
= convert (gnu_in_basetype
, integer_zero_node
);
5313 gnu_saved_result
= save_expr (gnu_result
);
5314 gnu_conv
= convert (calc_type
, gnu_saved_result
);
5315 gnu_comp
= build2 (GE_EXPR
, integer_type_node
,
5316 gnu_saved_result
, gnu_zero
);
5318 = build2 (PLUS_EXPR
, calc_type
, gnu_conv
, gnu_pred_half
);
5319 gnu_subtract_pred_half
5320 = build2 (MINUS_EXPR
, calc_type
, gnu_conv
, gnu_pred_half
);
5321 gnu_result
= build3 (COND_EXPR
, calc_type
, gnu_comp
,
5322 gnu_add_pred_half
, gnu_subtract_pred_half
);
5325 if (TREE_CODE (gnu_ada_base_type
) == INTEGER_TYPE
5326 && TYPE_HAS_ACTUAL_BOUNDS_P (gnu_ada_base_type
)
5327 && TREE_CODE (gnu_result
) == UNCONSTRAINED_ARRAY_REF
)
5328 gnu_result
= unchecked_convert (gnu_ada_base_type
, gnu_result
, false);
5330 gnu_result
= convert (gnu_ada_base_type
, gnu_result
);
5332 /* Finally, do the range check if requested. Note that if the
5333 result type is a modular type, the range check is actually
5334 an overflow check. */
5337 || (TREE_CODE (gnu_base_type
) == INTEGER_TYPE
5338 && TYPE_MODULAR_P (gnu_base_type
) && overflowp
))
5339 gnu_result
= emit_range_check (gnu_result
, gnat_type
);
5341 return convert (gnu_type
, gnu_result
);
5344 /* Return 1 if GNU_EXPR can be directly addressed. This is the case unless
5345 it is an expression involving computation or if it involves a bitfield
5346 reference. This returns the same as gnat_mark_addressable in most
5350 addressable_p (tree gnu_expr
)
5352 switch (TREE_CODE (gnu_expr
))
5358 /* All DECLs are addressable: if they are in a register, we can force
5362 case UNCONSTRAINED_ARRAY_REF
:
5370 return (!DECL_BIT_FIELD (TREE_OPERAND (gnu_expr
, 1))
5371 && !(STRICT_ALIGNMENT
5372 && DECL_NONADDRESSABLE_P (TREE_OPERAND (gnu_expr
, 1)))
5373 && addressable_p (TREE_OPERAND (gnu_expr
, 0)));
5375 case ARRAY_REF
: case ARRAY_RANGE_REF
:
5376 case REALPART_EXPR
: case IMAGPART_EXPR
:
5378 return addressable_p (TREE_OPERAND (gnu_expr
, 0));
5381 return (AGGREGATE_TYPE_P (TREE_TYPE (gnu_expr
))
5382 && addressable_p (TREE_OPERAND (gnu_expr
, 0)));
5384 case VIEW_CONVERT_EXPR
:
5386 /* This is addressable if we can avoid a copy. */
5387 tree type
= TREE_TYPE (gnu_expr
);
5388 tree inner_type
= TREE_TYPE (TREE_OPERAND (gnu_expr
, 0));
5390 return (((TYPE_MODE (type
) == TYPE_MODE (inner_type
)
5391 && (TYPE_ALIGN (type
) <= TYPE_ALIGN (inner_type
)
5392 || TYPE_ALIGN (inner_type
) >= BIGGEST_ALIGNMENT
))
5393 || ((TYPE_MODE (type
) == BLKmode
5394 || TYPE_MODE (inner_type
) == BLKmode
)
5395 && (TYPE_ALIGN (type
) <= TYPE_ALIGN (inner_type
)
5396 || TYPE_ALIGN (inner_type
) >= BIGGEST_ALIGNMENT
5397 || TYPE_ALIGN_OK (type
)
5398 || TYPE_ALIGN_OK (inner_type
))))
5399 && addressable_p (TREE_OPERAND (gnu_expr
, 0)));
5407 /* Do the processing for the declaration of a GNAT_ENTITY, a type. If
5408 a separate Freeze node exists, delay the bulk of the processing. Otherwise
5409 make a GCC type for GNAT_ENTITY and set up the correspondence. */
5412 process_type (Entity_Id gnat_entity
)
5415 = present_gnu_tree (gnat_entity
) ? get_gnu_tree (gnat_entity
) : 0;
5418 /* If we are to delay elaboration of this type, just do any
5419 elaborations needed for expressions within the declaration and
5420 make a dummy type entry for this node and its Full_View (if
5421 any) in case something points to it. Don't do this if it
5422 has already been done (the only way that can happen is if
5423 the private completion is also delayed). */
5424 if (Present (Freeze_Node (gnat_entity
))
5425 || (IN (Ekind (gnat_entity
), Incomplete_Or_Private_Kind
)
5426 && Present (Full_View (gnat_entity
))
5427 && Freeze_Node (Full_View (gnat_entity
))
5428 && !present_gnu_tree (Full_View (gnat_entity
))))
5430 elaborate_entity (gnat_entity
);
5434 tree gnu_decl
= create_type_decl (get_entity_name (gnat_entity
),
5435 make_dummy_type (gnat_entity
),
5436 NULL
, false, false, gnat_entity
);
5438 save_gnu_tree (gnat_entity
, gnu_decl
, false);
5439 if (IN (Ekind (gnat_entity
), Incomplete_Or_Private_Kind
)
5440 && Present (Full_View (gnat_entity
)))
5441 save_gnu_tree (Full_View (gnat_entity
), gnu_decl
, false);
5447 /* If we saved away a dummy type for this node it means that this
5448 made the type that corresponds to the full type of an incomplete
5449 type. Clear that type for now and then update the type in the
5453 if (TREE_CODE (gnu_old
) != TYPE_DECL
5454 || !TYPE_IS_DUMMY_P (TREE_TYPE (gnu_old
)))
5456 /* If this was a withed access type, this is not an error
5457 and merely indicates we've already elaborated the type
5459 gcc_assert (Is_Type (gnat_entity
) && From_With_Type (gnat_entity
));
5463 save_gnu_tree (gnat_entity
, NULL_TREE
, false);
5466 /* Now fully elaborate the type. */
5467 gnu_new
= gnat_to_gnu_entity (gnat_entity
, NULL_TREE
, 1);
5468 gcc_assert (TREE_CODE (gnu_new
) == TYPE_DECL
);
5470 /* If we have an old type and we've made pointers to this type,
5471 update those pointers. */
5473 update_pointer_to (TYPE_MAIN_VARIANT (TREE_TYPE (gnu_old
)),
5474 TREE_TYPE (gnu_new
));
5476 /* If this is a record type corresponding to a task or protected type
5477 that is a completion of an incomplete type, perform a similar update
5479 /* ??? Including protected types here is a guess. */
5481 if (IN (Ekind (gnat_entity
), Record_Kind
)
5482 && Is_Concurrent_Record_Type (gnat_entity
)
5483 && present_gnu_tree (Corresponding_Concurrent_Type (gnat_entity
)))
5486 = get_gnu_tree (Corresponding_Concurrent_Type (gnat_entity
));
5488 save_gnu_tree (Corresponding_Concurrent_Type (gnat_entity
),
5490 save_gnu_tree (Corresponding_Concurrent_Type (gnat_entity
),
5493 update_pointer_to (TYPE_MAIN_VARIANT (TREE_TYPE (gnu_task_old
)),
5494 TREE_TYPE (gnu_new
));
5498 /* GNAT_ASSOC is the front of the Component_Associations of an N_Aggregate.
5499 GNU_TYPE is the GCC type of the corresponding record.
5501 Return a CONSTRUCTOR to build the record. */
5504 assoc_to_constructor (Node_Id gnat_assoc
, tree gnu_type
)
5506 tree gnu_list
, gnu_result
;
5508 /* We test for GNU_FIELD being empty in the case where a variant
5509 was the last thing since we don't take things off GNAT_ASSOC in
5510 that case. We check GNAT_ASSOC in case we have a variant, but it
5513 for (gnu_list
= NULL_TREE
; Present (gnat_assoc
);
5514 gnat_assoc
= Next (gnat_assoc
))
5516 Node_Id gnat_field
= First (Choices (gnat_assoc
));
5517 tree gnu_field
= gnat_to_gnu_field_decl (Entity (gnat_field
));
5518 tree gnu_expr
= gnat_to_gnu (Expression (gnat_assoc
));
5520 /* The expander is supposed to put a single component selector name
5521 in every record component association */
5522 gcc_assert (No (Next (gnat_field
)));
5524 /* Ignore fields that have Corresponding_Discriminants since we'll
5525 be setting that field in the parent. */
5526 if (Present (Corresponding_Discriminant (Entity (gnat_field
)))
5527 && Is_Tagged_Type (Scope (Entity (gnat_field
))))
5530 /* Before assigning a value in an aggregate make sure range checks
5531 are done if required. Then convert to the type of the field. */
5532 if (Do_Range_Check (Expression (gnat_assoc
)))
5533 gnu_expr
= emit_range_check (gnu_expr
, Etype (gnat_field
));
5535 gnu_expr
= convert (TREE_TYPE (gnu_field
), gnu_expr
);
5537 /* Add the field and expression to the list. */
5538 gnu_list
= tree_cons (gnu_field
, gnu_expr
, gnu_list
);
5541 gnu_result
= extract_values (gnu_list
, gnu_type
);
5543 #ifdef ENABLE_CHECKING
5547 /* Verify every enty in GNU_LIST was used. */
5548 for (gnu_field
= gnu_list
; gnu_field
; gnu_field
= TREE_CHAIN (gnu_field
))
5549 gcc_assert (TREE_ADDRESSABLE (gnu_field
));
5556 /* Builds a possibly nested constructor for array aggregates. GNAT_EXPR
5557 is the first element of an array aggregate. It may itself be an
5558 aggregate (an array or record aggregate). GNU_ARRAY_TYPE is the gnu type
5559 corresponding to the array aggregate. GNAT_COMPONENT_TYPE is the type
5560 of the array component. It is needed for range checking. */
5563 pos_to_constructor (Node_Id gnat_expr
, tree gnu_array_type
,
5564 Entity_Id gnat_component_type
)
5566 tree gnu_expr_list
= NULL_TREE
;
5567 tree gnu_index
= TYPE_MIN_VALUE (TYPE_DOMAIN (gnu_array_type
));
5570 for ( ; Present (gnat_expr
); gnat_expr
= Next (gnat_expr
))
5572 /* If the expression is itself an array aggregate then first build the
5573 innermost constructor if it is part of our array (multi-dimensional
5576 if (Nkind (gnat_expr
) == N_Aggregate
5577 && TREE_CODE (TREE_TYPE (gnu_array_type
)) == ARRAY_TYPE
5578 && TYPE_MULTI_ARRAY_P (TREE_TYPE (gnu_array_type
)))
5579 gnu_expr
= pos_to_constructor (First (Expressions (gnat_expr
)),
5580 TREE_TYPE (gnu_array_type
),
5581 gnat_component_type
);
5584 gnu_expr
= gnat_to_gnu (gnat_expr
);
5586 /* before assigning the element to the array make sure it is
5588 if (Do_Range_Check (gnat_expr
))
5589 gnu_expr
= emit_range_check (gnu_expr
, gnat_component_type
);
5593 = tree_cons (gnu_index
, convert (TREE_TYPE (gnu_array_type
), gnu_expr
),
5596 gnu_index
= int_const_binop (PLUS_EXPR
, gnu_index
, integer_one_node
, 0);
5599 return gnat_build_constructor (gnu_array_type
, nreverse (gnu_expr_list
));
5602 /* Subroutine of assoc_to_constructor: VALUES is a list of field associations,
5603 some of which are from RECORD_TYPE. Return a CONSTRUCTOR consisting
5604 of the associations that are from RECORD_TYPE. If we see an internal
5605 record, make a recursive call to fill it in as well. */
5608 extract_values (tree values
, tree record_type
)
5610 tree result
= NULL_TREE
;
5613 for (field
= TYPE_FIELDS (record_type
); field
; field
= TREE_CHAIN (field
))
5617 /* _Parent is an internal field, but may have values in the aggregate,
5618 so check for values first. */
5619 if ((tem
= purpose_member (field
, values
)))
5621 value
= TREE_VALUE (tem
);
5622 TREE_ADDRESSABLE (tem
) = 1;
5625 else if (DECL_INTERNAL_P (field
))
5627 value
= extract_values (values
, TREE_TYPE (field
));
5628 if (TREE_CODE (value
) == CONSTRUCTOR
5629 && VEC_empty (constructor_elt
, CONSTRUCTOR_ELTS (value
)))
5633 /* If we have a record subtype, the names will match, but not the
5634 actual FIELD_DECLs. */
5635 for (tem
= values
; tem
; tem
= TREE_CHAIN (tem
))
5636 if (DECL_NAME (TREE_PURPOSE (tem
)) == DECL_NAME (field
))
5638 value
= convert (TREE_TYPE (field
), TREE_VALUE (tem
));
5639 TREE_ADDRESSABLE (tem
) = 1;
5645 result
= tree_cons (field
, value
, result
);
5648 return gnat_build_constructor (record_type
, nreverse (result
));
5651 /* EXP is to be treated as an array or record. Handle the cases when it is
5652 an access object and perform the required dereferences. */
5655 maybe_implicit_deref (tree exp
)
5657 /* If the type is a pointer, dereference it. */
5659 if (POINTER_TYPE_P (TREE_TYPE (exp
)) || TYPE_FAT_POINTER_P (TREE_TYPE (exp
)))
5660 exp
= build_unary_op (INDIRECT_REF
, NULL_TREE
, exp
);
5662 /* If we got a padded type, remove it too. */
5663 if (TREE_CODE (TREE_TYPE (exp
)) == RECORD_TYPE
5664 && TYPE_IS_PADDING_P (TREE_TYPE (exp
)))
5665 exp
= convert (TREE_TYPE (TYPE_FIELDS (TREE_TYPE (exp
))), exp
);
5670 /* Protect EXP from multiple evaluation. This may make a SAVE_EXPR. */
5673 protect_multiple_eval (tree exp
)
5675 tree type
= TREE_TYPE (exp
);
5677 /* If this has no side effects, we don't need to do anything. */
5678 if (!TREE_SIDE_EFFECTS (exp
))
5681 /* If it is a conversion, protect what's inside the conversion.
5682 Similarly, if we're indirectly referencing something, we only
5683 actually need to protect the address since the data itself can't
5684 change in these situations. */
5685 else if (TREE_CODE (exp
) == NON_LVALUE_EXPR
5686 || TREE_CODE (exp
) == NOP_EXPR
|| TREE_CODE (exp
) == CONVERT_EXPR
5687 || TREE_CODE (exp
) == VIEW_CONVERT_EXPR
5688 || TREE_CODE (exp
) == INDIRECT_REF
5689 || TREE_CODE (exp
) == UNCONSTRAINED_ARRAY_REF
)
5690 return build1 (TREE_CODE (exp
), type
,
5691 protect_multiple_eval (TREE_OPERAND (exp
, 0)));
5693 /* If EXP is a fat pointer or something that can be placed into a register,
5694 just make a SAVE_EXPR. */
5695 if (TYPE_FAT_POINTER_P (type
) || TYPE_MODE (type
) != BLKmode
)
5696 return save_expr (exp
);
5698 /* Otherwise, dereference, protect the address, and re-reference. */
5701 build_unary_op (INDIRECT_REF
, type
,
5702 save_expr (build_unary_op (ADDR_EXPR
,
5703 build_reference_type (type
),
5707 /* This is equivalent to stabilize_reference in GCC's tree.c, but we know
5708 how to handle our new nodes and we take an extra argument that says
5709 whether to force evaluation of everything. */
5712 gnat_stabilize_reference (tree ref
, bool force
)
5714 tree type
= TREE_TYPE (ref
);
5715 enum tree_code code
= TREE_CODE (ref
);
5723 /* No action is needed in this case. */
5729 case FIX_TRUNC_EXPR
:
5730 case FIX_FLOOR_EXPR
:
5731 case FIX_ROUND_EXPR
:
5733 case VIEW_CONVERT_EXPR
:
5736 = build1 (code
, type
,
5737 gnat_stabilize_reference (TREE_OPERAND (ref
, 0), force
));
5741 case UNCONSTRAINED_ARRAY_REF
:
5742 result
= build1 (code
, type
,
5743 gnat_stabilize_reference_1 (TREE_OPERAND (ref
, 0),
5748 result
= build3 (COMPONENT_REF
, type
,
5749 gnat_stabilize_reference (TREE_OPERAND (ref
, 0),
5751 TREE_OPERAND (ref
, 1), NULL_TREE
);
5755 result
= build3 (BIT_FIELD_REF
, type
,
5756 gnat_stabilize_reference (TREE_OPERAND (ref
, 0), force
),
5757 gnat_stabilize_reference_1 (TREE_OPERAND (ref
, 1),
5759 gnat_stabilize_reference_1 (TREE_OPERAND (ref
, 2),
5764 case ARRAY_RANGE_REF
:
5765 result
= build4 (code
, type
,
5766 gnat_stabilize_reference (TREE_OPERAND (ref
, 0), force
),
5767 gnat_stabilize_reference_1 (TREE_OPERAND (ref
, 1),
5769 NULL_TREE
, NULL_TREE
);
5773 result
= build2 (COMPOUND_EXPR
, type
,
5774 gnat_stabilize_reference_1 (TREE_OPERAND (ref
, 0),
5776 gnat_stabilize_reference (TREE_OPERAND (ref
, 1),
5780 /* If arg isn't a kind of lvalue we recognize, make no change.
5781 Caller should recognize the error for an invalid lvalue. */
5786 return error_mark_node
;
5789 TREE_READONLY (result
) = TREE_READONLY (ref
);
5791 /* TREE_THIS_VOLATILE and TREE_SIDE_EFFECTS attached to the initial
5792 expression may not be sustained across some paths, such as the way via
5793 build1 for INDIRECT_REF. We re-populate those flags here for the general
5794 case, which is consistent with the GCC version of this routine.
5796 Special care should be taken regarding TREE_SIDE_EFFECTS, because some
5797 paths introduce side effects where there was none initially (e.g. calls
5798 to save_expr), and we also want to keep track of that. */
5800 TREE_THIS_VOLATILE (result
) = TREE_THIS_VOLATILE (ref
);
5801 TREE_SIDE_EFFECTS (result
) |= TREE_SIDE_EFFECTS (ref
);
5806 /* Similar to stabilize_reference_1 in tree.c, but supports an extra
5807 arg to force a SAVE_EXPR for everything. */
5810 gnat_stabilize_reference_1 (tree e
, bool force
)
5812 enum tree_code code
= TREE_CODE (e
);
5813 tree type
= TREE_TYPE (e
);
5816 /* We cannot ignore const expressions because it might be a reference
5817 to a const array but whose index contains side-effects. But we can
5818 ignore things that are actual constant or that already have been
5819 handled by this function. */
5821 if (TREE_CONSTANT (e
) || code
== SAVE_EXPR
)
5824 switch (TREE_CODE_CLASS (code
))
5826 case tcc_exceptional
:
5828 case tcc_declaration
:
5829 case tcc_comparison
:
5831 case tcc_expression
:
5833 /* If this is a COMPONENT_REF of a fat pointer, save the entire
5834 fat pointer. This may be more efficient, but will also allow
5835 us to more easily find the match for the PLACEHOLDER_EXPR. */
5836 if (code
== COMPONENT_REF
5837 && TYPE_FAT_POINTER_P (TREE_TYPE (TREE_OPERAND (e
, 0))))
5838 result
= build3 (COMPONENT_REF
, type
,
5839 gnat_stabilize_reference_1 (TREE_OPERAND (e
, 0),
5841 TREE_OPERAND (e
, 1), TREE_OPERAND (e
, 2));
5842 else if (TREE_SIDE_EFFECTS (e
) || force
)
5843 return save_expr (e
);
5849 /* Constants need no processing. In fact, we should never reach
5854 /* Recursively stabilize each operand. */
5855 result
= build2 (code
, type
,
5856 gnat_stabilize_reference_1 (TREE_OPERAND (e
, 0), force
),
5857 gnat_stabilize_reference_1 (TREE_OPERAND (e
, 1),
5862 /* Recursively stabilize each operand. */
5863 result
= build1 (code
, type
,
5864 gnat_stabilize_reference_1 (TREE_OPERAND (e
, 0),
5872 TREE_READONLY (result
) = TREE_READONLY (e
);
5874 TREE_THIS_VOLATILE (result
) = TREE_THIS_VOLATILE (e
);
5875 TREE_SIDE_EFFECTS (result
) |= TREE_SIDE_EFFECTS (e
);
5879 /* Build a global constructor or destructor function. METHOD_TYPE gives
5880 the type of the function and CDTORS points to the list of constructor
5881 or destructor functions to be invoked. FIXME: Migrate into cgraph. */
5884 build_global_cdtor (int method_type
, tree
*cdtors
)
5888 for (; *cdtors
; *cdtors
= TREE_CHAIN (*cdtors
))
5890 tree fn
= TREE_VALUE (*cdtors
);
5891 tree fntype
= TREE_TYPE (fn
);
5892 tree fnaddr
= build1 (ADDR_EXPR
, build_pointer_type (fntype
), fn
);
5893 tree fncall
= build3 (CALL_EXPR
, TREE_TYPE (fntype
), fnaddr
, NULL_TREE
,
5895 append_to_statement_list (fncall
, &body
);
5898 cgraph_build_static_cdtor (method_type
, body
, DEFAULT_INIT_PRIORITY
);
5901 extern char *__gnat_to_canonical_file_spec (char *);
5903 /* Convert Sloc into *LOCUS (a location_t). Return true if this Sloc
5904 corresponds to a source code location and false if it doesn't. In the
5905 latter case, we don't update *LOCUS. We also set the Gigi global variable
5906 REF_FILENAME to the reference file name as given by sinput (i.e no
5910 Sloc_to_locus (Source_Ptr Sloc
, location_t
*locus
)
5912 /* If node not from source code, ignore. */
5916 /* Use the identifier table to make a hashed, permanent copy of the filename,
5917 since the name table gets reallocated after Gigi returns but before all
5918 the debugging information is output. The __gnat_to_canonical_file_spec
5919 call translates filenames from pragmas Source_Reference that contain host
5920 style syntax not understood by gdb. */
5922 = IDENTIFIER_POINTER
5924 (__gnat_to_canonical_file_spec
5925 (Get_Name_String (Full_Debug_Name (Get_Source_File_Index (Sloc
))))));
5927 locus
->line
= Get_Logical_Line_Number (Sloc
);
5930 = IDENTIFIER_POINTER
5932 (Get_Name_String (Debug_Source_Name (Get_Source_File_Index (Sloc
)))));;
5937 /* Similar to annotate_with_locus, but start with the Sloc of GNAT_NODE and
5938 don't do anything if it doesn't correspond to a source location. */
5941 annotate_with_node (tree node
, Node_Id gnat_node
)
5945 if (!Sloc_to_locus (Sloc (gnat_node
), &locus
))
5948 annotate_with_locus (node
, locus
);
5951 /* Post an error message. MSG is the error message, properly annotated.
5952 NODE is the node at which to post the error and the node to use for the
5953 "&" substitution. */
5956 post_error (const char *msg
, Node_Id node
)
5958 String_Template temp
;
5961 temp
.Low_Bound
= 1, temp
.High_Bound
= strlen (msg
);
5962 fp
.Array
= msg
, fp
.Bounds
= &temp
;
5964 Error_Msg_N (fp
, node
);
5967 /* Similar, but NODE is the node at which to post the error and ENT
5968 is the node to use for the "&" substitution. */
5971 post_error_ne (const char *msg
, Node_Id node
, Entity_Id ent
)
5973 String_Template temp
;
5976 temp
.Low_Bound
= 1, temp
.High_Bound
= strlen (msg
);
5977 fp
.Array
= msg
, fp
.Bounds
= &temp
;
5979 Error_Msg_NE (fp
, node
, ent
);
5982 /* Similar, but NODE is the node at which to post the error, ENT is the node
5983 to use for the "&" substitution, and N is the number to use for the ^. */
5986 post_error_ne_num (const char *msg
, Node_Id node
, Entity_Id ent
, int n
)
5988 String_Template temp
;
5991 temp
.Low_Bound
= 1, temp
.High_Bound
= strlen (msg
);
5992 fp
.Array
= msg
, fp
.Bounds
= &temp
;
5993 Error_Msg_Uint_1
= UI_From_Int (n
);
5996 Error_Msg_NE (fp
, node
, ent
);
5999 /* Similar to post_error_ne_num, but T is a GCC tree representing the
6000 number to write. If the tree represents a constant that fits within
6001 a host integer, the text inside curly brackets in MSG will be output
6002 (presumably including a '^'). Otherwise that text will not be output
6003 and the text inside square brackets will be output instead. */
6006 post_error_ne_tree (const char *msg
, Node_Id node
, Entity_Id ent
, tree t
)
6008 char *newmsg
= alloca (strlen (msg
) + 1);
6009 String_Template temp
= {1, 0};
6011 char start_yes
, end_yes
, start_no
, end_no
;
6015 fp
.Array
= newmsg
, fp
.Bounds
= &temp
;
6017 if (host_integerp (t
, 1)
6018 #if HOST_BITS_PER_WIDE_INT > HOST_BITS_PER_INT
6021 (t
, (((unsigned HOST_WIDE_INT
) 1 << (HOST_BITS_PER_INT
- 1)) - 1)) < 0
6025 Error_Msg_Uint_1
= UI_From_Int (tree_low_cst (t
, 1));
6026 start_yes
= '{', end_yes
= '}', start_no
= '[', end_no
= ']';
6029 start_yes
= '[', end_yes
= ']', start_no
= '{', end_no
= '}';
6031 for (p
= msg
, q
= newmsg
; *p
; p
++)
6033 if (*p
== start_yes
)
6034 for (p
++; *p
!= end_yes
; p
++)
6036 else if (*p
== start_no
)
6037 for (p
++; *p
!= end_no
; p
++)
6045 temp
.High_Bound
= strlen (newmsg
);
6047 Error_Msg_NE (fp
, node
, ent
);
6050 /* Similar to post_error_ne_tree, except that NUM is a second
6051 integer to write in the message. */
6054 post_error_ne_tree_2 (const char *msg
,
6060 Error_Msg_Uint_2
= UI_From_Int (num
);
6061 post_error_ne_tree (msg
, node
, ent
, t
);
6064 /* Initialize the table that maps GNAT codes to GCC codes for simple
6065 binary and unary operations. */
6068 init_code_table (void)
6070 gnu_codes
[N_And_Then
] = TRUTH_ANDIF_EXPR
;
6071 gnu_codes
[N_Or_Else
] = TRUTH_ORIF_EXPR
;
6073 gnu_codes
[N_Op_And
] = TRUTH_AND_EXPR
;
6074 gnu_codes
[N_Op_Or
] = TRUTH_OR_EXPR
;
6075 gnu_codes
[N_Op_Xor
] = TRUTH_XOR_EXPR
;
6076 gnu_codes
[N_Op_Eq
] = EQ_EXPR
;
6077 gnu_codes
[N_Op_Ne
] = NE_EXPR
;
6078 gnu_codes
[N_Op_Lt
] = LT_EXPR
;
6079 gnu_codes
[N_Op_Le
] = LE_EXPR
;
6080 gnu_codes
[N_Op_Gt
] = GT_EXPR
;
6081 gnu_codes
[N_Op_Ge
] = GE_EXPR
;
6082 gnu_codes
[N_Op_Add
] = PLUS_EXPR
;
6083 gnu_codes
[N_Op_Subtract
] = MINUS_EXPR
;
6084 gnu_codes
[N_Op_Multiply
] = MULT_EXPR
;
6085 gnu_codes
[N_Op_Mod
] = FLOOR_MOD_EXPR
;
6086 gnu_codes
[N_Op_Rem
] = TRUNC_MOD_EXPR
;
6087 gnu_codes
[N_Op_Minus
] = NEGATE_EXPR
;
6088 gnu_codes
[N_Op_Abs
] = ABS_EXPR
;
6089 gnu_codes
[N_Op_Not
] = TRUTH_NOT_EXPR
;
6090 gnu_codes
[N_Op_Rotate_Left
] = LROTATE_EXPR
;
6091 gnu_codes
[N_Op_Rotate_Right
] = RROTATE_EXPR
;
6092 gnu_codes
[N_Op_Shift_Left
] = LSHIFT_EXPR
;
6093 gnu_codes
[N_Op_Shift_Right
] = RSHIFT_EXPR
;
6094 gnu_codes
[N_Op_Shift_Right_Arithmetic
] = RSHIFT_EXPR
;
6097 #include "gt-ada-trans.h"