1 /****************************************************************************
3 * GNAT COMPILER COMPONENTS *
9 * Copyright (C) 1992-2008, 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 3, 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 along with GCC; see the file COPYING3. If not see *
19 * <http://www.gnu.org/licenses/>. *
21 * GNAT was originally developed by the GNAT team at New York University. *
22 * Extensive contributions were provided by Ada Core Technologies Inc. *
24 ****************************************************************************/
26 /* Ada uses the lang_decl and lang_type fields to hold a tree. */
29 chain_next ("(union lang_tree_node *)GENERIC_NEXT (&%h.t)")))
31 union tree_node
GTY((tag ("0"))) t
;
33 struct lang_decl
GTY(()) {tree t
; };
34 struct lang_type
GTY(()) {tree t
; };
36 /* Define macros to get and set the tree in TYPE_ and DECL_LANG_SPECIFIC. */
37 #define GET_TYPE_LANG_SPECIFIC(NODE) \
38 (TYPE_LANG_SPECIFIC (NODE) ? TYPE_LANG_SPECIFIC (NODE)->t : NULL_TREE)
39 #define SET_TYPE_LANG_SPECIFIC(NODE, X) \
40 (TYPE_LANG_SPECIFIC (NODE) \
41 = (TYPE_LANG_SPECIFIC (NODE) \
42 ? TYPE_LANG_SPECIFIC (NODE) : GGC_NEW (struct lang_type))) \
45 #define GET_DECL_LANG_SPECIFIC(NODE) \
46 (DECL_LANG_SPECIFIC (NODE) ? DECL_LANG_SPECIFIC (NODE)->t : NULL_TREE)
47 #define SET_DECL_LANG_SPECIFIC(NODE, VALUE) \
48 (DECL_LANG_SPECIFIC (NODE) \
49 = (DECL_LANG_SPECIFIC (NODE) \
50 ? DECL_LANG_SPECIFIC (NODE) : GGC_NEW (struct lang_decl))) \
53 /* Flags added to GCC type nodes. */
55 /* For RECORD_TYPE, UNION_TYPE, and QUAL_UNION_TYPE, nonzero if this is a
56 record being used as a fat pointer (only true for RECORD_TYPE). */
57 #define TYPE_IS_FAT_POINTER_P(NODE) \
58 TYPE_LANG_FLAG_0 (RECORD_OR_UNION_CHECK (NODE))
60 #define TYPE_FAT_POINTER_P(NODE) \
61 (TREE_CODE (NODE) == RECORD_TYPE && TYPE_IS_FAT_POINTER_P (NODE))
63 /* For integral types and array types, nonzero if this is a packed array type
64 used for bit-packed types. Such types should not be extended to a larger
65 size or validated against a specified size. */
66 #define TYPE_PACKED_ARRAY_TYPE_P(NODE) TYPE_LANG_FLAG_0 (NODE)
68 #define TYPE_IS_PACKED_ARRAY_TYPE_P(NODE) \
69 ((TREE_CODE (NODE) == INTEGER_TYPE || TREE_CODE (NODE) == ARRAY_TYPE) \
70 && TYPE_PACKED_ARRAY_TYPE_P (NODE))
72 /* For INTEGER_TYPE, nonzero if this is a modular type with a modulus that
73 is not equal to two to the power of its mode's size. */
74 #define TYPE_MODULAR_P(NODE) TYPE_LANG_FLAG_1 (INTEGER_TYPE_CHECK (NODE))
76 /* For ARRAY_TYPE, nonzero if this type corresponds to a dimension of
77 an Ada array other than the first. */
78 #define TYPE_MULTI_ARRAY_P(NODE) TYPE_LANG_FLAG_1 (ARRAY_TYPE_CHECK (NODE))
80 /* For FUNCTION_TYPE, nonzero if this denotes a function returning an
81 unconstrained array or record. */
82 #define TYPE_RETURNS_UNCONSTRAINED_P(NODE) \
83 TYPE_LANG_FLAG_1 (FUNCTION_TYPE_CHECK (NODE))
85 /* For RECORD_TYPE, UNION_TYPE, and QUAL_UNION_TYPE, nonzero if this denotes
86 a justified modular type (will only be true for RECORD_TYPE). */
87 #define TYPE_JUSTIFIED_MODULAR_P(NODE) \
88 TYPE_LANG_FLAG_1 (RECORD_OR_UNION_CHECK (NODE))
90 /* Nonzero in an arithmetic subtype if this is a subtype not known to the
92 #define TYPE_EXTRA_SUBTYPE_P(NODE) TYPE_LANG_FLAG_2 (NODE)
94 /* Nonzero for composite types if this is a by-reference type. */
95 #define TYPE_BY_REFERENCE_P(NODE) TYPE_LANG_FLAG_2 (NODE)
97 /* For RECORD_TYPE, UNION_TYPE, and QUAL_UNION_TYPE, nonzero if this is the
98 type for an object whose type includes its template in addition to
99 its value (only true for RECORD_TYPE). */
100 #define TYPE_CONTAINS_TEMPLATE_P(NODE) \
101 TYPE_LANG_FLAG_3 (RECORD_OR_UNION_CHECK (NODE))
103 /* For INTEGER_TYPE, nonzero if this really represents a VAX
104 floating-point type. */
105 #define TYPE_VAX_FLOATING_POINT_P(NODE) \
106 TYPE_LANG_FLAG_3 (INTEGER_TYPE_CHECK (NODE))
108 /* True if NODE is a thin pointer. */
109 #define TYPE_THIN_POINTER_P(NODE) \
110 (POINTER_TYPE_P (NODE) \
111 && TREE_CODE (TREE_TYPE (NODE)) == RECORD_TYPE \
112 && TYPE_CONTAINS_TEMPLATE_P (TREE_TYPE (NODE)))
114 /* True if TYPE is either a fat or thin pointer to an unconstrained
116 #define TYPE_FAT_OR_THIN_POINTER_P(NODE) \
117 (TYPE_FAT_POINTER_P (NODE) || TYPE_THIN_POINTER_P (NODE))
119 /* For INTEGER_TYPEs, nonzero if the type has a biased representation. */
120 #define TYPE_BIASED_REPRESENTATION_P(NODE) \
121 TYPE_LANG_FLAG_4 (INTEGER_TYPE_CHECK (NODE))
123 /* For ARRAY_TYPEs, nonzero if the array type has Convention_Fortran. */
124 #define TYPE_CONVENTION_FORTRAN_P(NODE) \
125 TYPE_LANG_FLAG_4 (ARRAY_TYPE_CHECK (NODE))
127 /* For FUNCTION_TYPEs, nonzero if the function returns by reference. */
128 #define TYPE_RETURNS_BY_REF_P(NODE) \
129 TYPE_LANG_FLAG_4 (FUNCTION_TYPE_CHECK (NODE))
131 /* For VOID_TYPE, ENUMERAL_TYPE, UNION_TYPE, and RECORD_TYPE, nonzero if this
132 is a dummy type, made to correspond to a private or incomplete type. */
133 #define TYPE_DUMMY_P(NODE) TYPE_LANG_FLAG_4 (NODE)
135 /* True if TYPE is such a dummy type. */
136 #define TYPE_IS_DUMMY_P(NODE) \
137 ((TREE_CODE (NODE) == VOID_TYPE || TREE_CODE (NODE) == RECORD_TYPE \
138 || TREE_CODE (NODE) == UNION_TYPE || TREE_CODE (NODE) == ENUMERAL_TYPE) \
139 && TYPE_DUMMY_P (NODE))
141 /* For FUNCTION_TYPEs, nonzero if function returns by being passed a pointer
142 to a place to store its result. */
143 #define TYPE_RETURNS_BY_TARGET_PTR_P(NODE) \
144 TYPE_LANG_FLAG_5 (FUNCTION_TYPE_CHECK (NODE))
146 /* For an INTEGER_TYPE, nonzero if TYPE_ACTUAL_BOUNDS is present. */
147 #define TYPE_HAS_ACTUAL_BOUNDS_P(NODE) \
148 TYPE_LANG_FLAG_5 (INTEGER_TYPE_CHECK (NODE))
150 /* For a RECORD_TYPE, nonzero if this was made just to supply needed
151 padding or alignment. */
152 #define TYPE_IS_PADDING_P(NODE) TYPE_LANG_FLAG_5 (RECORD_TYPE_CHECK (NODE))
154 /* True if TYPE can alias any other types. */
155 #define TYPE_UNIVERSAL_ALIASING_P(NODE) TYPE_LANG_FLAG_6 (NODE)
157 /* This field is only defined for FUNCTION_TYPE nodes. If the Ada
158 subprogram contains no parameters passed by copy in/copy out then this
159 field is 0. Otherwise it points to a list of nodes used to specify the
160 return values of the out (or in out) parameters that qualify to be passed
161 by copy in copy out. It is a CONSTRUCTOR. For a full description of the
162 cico parameter passing mechanism refer to the routine gnat_to_gnu_entity. */
163 #define TYPE_CI_CO_LIST(NODE) TYPE_LANG_SLOT_1 (FUNCTION_TYPE_CHECK (NODE))
165 /* For an INTEGER_TYPE with TYPE_MODULAR_P, this is the value of the
167 #define TYPE_MODULUS(NODE) GET_TYPE_LANG_SPECIFIC (INTEGER_TYPE_CHECK (NODE))
168 #define SET_TYPE_MODULUS(NODE, X) \
169 SET_TYPE_LANG_SPECIFIC (INTEGER_TYPE_CHECK (NODE), X)
171 /* For an INTEGER_TYPE that is the TYPE_DOMAIN of some ARRAY_TYPE, points to
172 the type corresponding to the Ada index type. */
173 #define TYPE_INDEX_TYPE(NODE) \
174 GET_TYPE_LANG_SPECIFIC (INTEGER_TYPE_CHECK (NODE))
175 #define SET_TYPE_INDEX_TYPE(NODE, X) \
176 SET_TYPE_LANG_SPECIFIC (INTEGER_TYPE_CHECK (NODE), X)
178 /* For an INTEGER_TYPE with TYPE_VAX_FLOATING_POINT_P, stores the
180 #define TYPE_DIGITS_VALUE(NODE) \
181 GET_TYPE_LANG_SPECIFIC (INTEGER_TYPE_CHECK (NODE))
182 #define SET_TYPE_DIGITS_VALUE(NODE, X) \
183 SET_TYPE_LANG_SPECIFIC (INTEGER_TYPE_CHECK (NODE), X)
185 /* For numeric types, stores the RM_Size of the type. */
186 #define TYPE_RM_SIZE_NUM(NODE) TYPE_LANG_SLOT_1 (NUMERICAL_TYPE_CHECK (NODE))
188 #define TYPE_RM_SIZE(NODE) \
189 (INTEGRAL_TYPE_P (NODE) || TREE_CODE (NODE) == REAL_TYPE \
190 ? TYPE_RM_SIZE_NUM (NODE) : 0)
192 /* For a RECORD_TYPE that is a fat pointer, point to the type for the
193 unconstrained object. Likewise for a RECORD_TYPE that is pointed
194 to by a thin pointer. */
195 #define TYPE_UNCONSTRAINED_ARRAY(NODE) \
196 GET_TYPE_LANG_SPECIFIC (RECORD_TYPE_CHECK (NODE))
197 #define SET_TYPE_UNCONSTRAINED_ARRAY(NODE, X) \
198 SET_TYPE_LANG_SPECIFIC (RECORD_TYPE_CHECK (NODE), X)
200 /* For other RECORD_TYPEs and all UNION_TYPEs and QUAL_UNION_TYPEs, the Ada
201 size of the object. This differs from the GCC size in that it does not
202 include any rounding up to the alignment of the type. */
203 #define TYPE_ADA_SIZE(NODE) \
204 GET_TYPE_LANG_SPECIFIC (RECORD_OR_UNION_CHECK (NODE))
205 #define SET_TYPE_ADA_SIZE(NODE, X) \
206 SET_TYPE_LANG_SPECIFIC (RECORD_OR_UNION_CHECK (NODE), X)
208 /* For an INTEGER_TYPE with TYPE_HAS_ACTUAL_BOUNDS_P or an ARRAY_TYPE, this is
209 the index type that should be used when the actual bounds are required for
210 a template. This is used in the case of packed arrays. */
211 #define TYPE_ACTUAL_BOUNDS(NODE) \
212 GET_TYPE_LANG_SPECIFIC (TREE_CHECK2 (NODE, INTEGER_TYPE, ARRAY_TYPE))
213 #define SET_TYPE_ACTUAL_BOUNDS(NODE, X) \
214 SET_TYPE_LANG_SPECIFIC (TREE_CHECK2 (NODE, INTEGER_TYPE, ARRAY_TYPE), X)
216 /* In an UNCONSTRAINED_ARRAY_TYPE, points to the record containing both
217 the template and object.
219 ??? We also put this on an ENUMERAL_TYPE that's dummy. Technically,
220 this is a conflict on the minval field, but there doesn't seem to be
221 simple fix, so we'll live with this kludge for now. */
222 #define TYPE_OBJECT_RECORD_TYPE(NODE) \
223 (TREE_CHECK2 ((NODE), UNCONSTRAINED_ARRAY_TYPE, ENUMERAL_TYPE)->type.minval)
225 /* Nonzero in a FUNCTION_DECL that represents a stubbed function
227 #define DECL_STUBBED_P(NODE) DECL_LANG_FLAG_0 (FUNCTION_DECL_CHECK (NODE))
229 /* Nonzero in a VAR_DECL if it is guaranteed to be constant after having
230 been elaborated and TREE_READONLY is not set on it. */
231 #define DECL_READONLY_ONCE_ELAB(NODE) DECL_LANG_FLAG_0 (VAR_DECL_CHECK (NODE))
233 /* Nonzero if this decl is always used by reference; i.e., an INDIRECT_REF
234 is needed to access the object. */
235 #define DECL_BY_REF_P(NODE) DECL_LANG_FLAG_1 (NODE)
237 /* Nonzero in a FIELD_DECL that is a dummy built for some internal reason. */
238 #define DECL_INTERNAL_P(NODE) DECL_LANG_FLAG_3 (FIELD_DECL_CHECK (NODE))
240 /* Nonzero if this decl is a PARM_DECL for an Ada array being passed to a
241 foreign convention subprogram. */
242 #define DECL_BY_COMPONENT_PTR_P(NODE) DECL_LANG_FLAG_3 (PARM_DECL_CHECK (NODE))
244 /* Nonzero in a FUNCTION_DECL that corresponds to an elaboration procedure. */
245 #define DECL_ELABORATION_PROC_P(NODE) \
246 DECL_LANG_FLAG_3 (FUNCTION_DECL_CHECK (NODE))
248 /* Nonzero if this is a decl for a pointer that points to something which
249 is readonly. Used mostly for fat pointers. */
250 #define DECL_POINTS_TO_READONLY_P(NODE) DECL_LANG_FLAG_4 (NODE)
252 /* Nonzero in a FIELD_DECL if there was a record rep clause. */
253 #define DECL_HAS_REP_P(NODE) DECL_LANG_FLAG_5 (FIELD_DECL_CHECK (NODE))
255 /* Nonzero in a PARM_DECL if we are to pass by descriptor. */
256 #define DECL_BY_DESCRIPTOR_P(NODE) DECL_LANG_FLAG_5 (PARM_DECL_CHECK (NODE))
258 /* Nonzero in a VAR_DECL if it is a pointer renaming a global object. */
259 #define DECL_RENAMING_GLOBAL_P(NODE) DECL_LANG_FLAG_5 (VAR_DECL_CHECK (NODE))
261 /* In a CONST_DECL, points to a VAR_DECL that is allocatable to
262 memory. Used when a scalar constant is aliased or has its
264 #define DECL_CONST_CORRESPONDING_VAR(NODE) \
265 GET_DECL_LANG_SPECIFIC (CONST_DECL_CHECK (NODE))
266 #define SET_DECL_CONST_CORRESPONDING_VAR(NODE, X) \
267 SET_DECL_LANG_SPECIFIC (CONST_DECL_CHECK (NODE), X)
269 /* In a FIELD_DECL, points to the FIELD_DECL that was the ultimate
270 source of the decl. */
271 #define DECL_ORIGINAL_FIELD(NODE) \
272 GET_DECL_LANG_SPECIFIC (FIELD_DECL_CHECK (NODE))
273 #define SET_DECL_ORIGINAL_FIELD(NODE, X) \
274 SET_DECL_LANG_SPECIFIC (FIELD_DECL_CHECK (NODE), X)
276 /* In a VAR_DECL, points to the object being renamed if the VAR_DECL is a
277 renaming pointer, otherwise 0. Note that this object is guaranteed to
278 be protected against multiple evaluations. */
279 #define DECL_RENAMED_OBJECT(NODE) \
280 GET_DECL_LANG_SPECIFIC (VAR_DECL_CHECK (NODE))
281 #define SET_DECL_RENAMED_OBJECT(NODE, X) \
282 SET_DECL_LANG_SPECIFIC (VAR_DECL_CHECK (NODE), X)
284 /* In a TYPE_DECL, points to the parallel type if any, otherwise 0. */
285 #define DECL_PARALLEL_TYPE(NODE) \
286 GET_DECL_LANG_SPECIFIC (TYPE_DECL_CHECK (NODE))
287 #define SET_DECL_PARALLEL_TYPE(NODE, X) \
288 SET_DECL_LANG_SPECIFIC (TYPE_DECL_CHECK (NODE), X)
290 /* In a FUNCTION_DECL, points to the stub associated with the function
291 if any, otherwise 0. */
292 #define DECL_FUNCTION_STUB(NODE) \
293 GET_DECL_LANG_SPECIFIC (FUNCTION_DECL_CHECK (NODE))
294 #define SET_DECL_FUNCTION_STUB(NODE, X) \
295 SET_DECL_LANG_SPECIFIC (FUNCTION_DECL_CHECK (NODE), X)
297 /* In a FIELD_DECL corresponding to a discriminant, contains the
298 discriminant number. */
299 #define DECL_DISCRIMINANT_NUMBER(NODE) DECL_INITIAL (FIELD_DECL_CHECK (NODE))
301 /* Define fields and macros for statements.
303 Start by defining which tree codes are used for statements. */
304 #define IS_STMT(NODE) (STATEMENT_CLASS_P (NODE))
305 #define IS_ADA_STMT(NODE) (IS_STMT (NODE) \
306 && TREE_CODE (NODE) >= STMT_STMT)
308 #define STMT_STMT_STMT(NODE) TREE_OPERAND_CHECK_CODE (NODE, STMT_STMT, 0)
309 #define LOOP_STMT_TOP_COND(NODE) TREE_OPERAND_CHECK_CODE (NODE, LOOP_STMT, 0)
310 #define LOOP_STMT_BOT_COND(NODE) TREE_OPERAND_CHECK_CODE (NODE, LOOP_STMT, 1)
311 #define LOOP_STMT_UPDATE(NODE) TREE_OPERAND_CHECK_CODE (NODE, LOOP_STMT, 2)
312 #define LOOP_STMT_BODY(NODE) TREE_OPERAND_CHECK_CODE (NODE, LOOP_STMT, 3)
313 #define LOOP_STMT_LABEL(NODE) TREE_OPERAND_CHECK_CODE (NODE, LOOP_STMT, 4)
314 #define EXIT_STMT_COND(NODE) TREE_OPERAND_CHECK_CODE (NODE, EXIT_STMT, 0)
315 #define EXIT_STMT_LABEL(NODE) TREE_OPERAND_CHECK_CODE (NODE, EXIT_STMT, 1)
316 #define REGION_STMT_BODY(NODE) TREE_OPERAND_CHECK_CODE (NODE, REGION_STMT, 0)
317 #define REGION_STMT_HANDLE(NODE) TREE_OPERAND_CHECK_CODE (NODE, REGION_STMT, 1)
318 #define REGION_STMT_BLOCK(NODE) TREE_OPERAND_CHECK_CODE (NODE, REGION_STMT, 2)
319 #define HANDLER_STMT_ARG(NODE) TREE_OPERAND_CHECK_CODE (NODE, HANDLER_STMT, 0)
320 #define HANDLER_STMT_LIST(NODE) TREE_OPERAND_CHECK_CODE (NODE, HANDLER_STMT, 1)
321 #define HANDLER_STMT_BLOCK(NODE) TREE_OPERAND_CHECK_CODE(NODE, HANDLER_STMT, 2)