1 /****************************************************************************
3 * GNAT COMPILER COMPONENTS *
9 * Copyright (C) 1992-2007, 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 ****************************************************************************/
27 /* Ada language-specific GC tree codes. */
28 #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) SYM,
30 __DUMMY = LAST_AND_UNUSED_TREE_CODE,
31 #include "ada-tree.def"
36 /* Ada uses the lang_decl and lang_type fields to hold a tree. */
39 chain_next ("(union lang_tree_node *)GENERIC_NEXT (&%h.t)")))
42 union tree_node GTY((tag ("0"))) t;
44 struct lang_decl GTY(()) {tree t; };
45 struct lang_type GTY(()) {tree t; };
47 /* Define macros to get and set the tree in TYPE_ and DECL_LANG_SPECIFIC. */
48 #define GET_TYPE_LANG_SPECIFIC(NODE) \
49 (TYPE_LANG_SPECIFIC (NODE) ? TYPE_LANG_SPECIFIC (NODE)->t : NULL_TREE)
50 #define SET_TYPE_LANG_SPECIFIC(NODE, X) \
51 (TYPE_LANG_SPECIFIC (NODE) \
52 = (TYPE_LANG_SPECIFIC (NODE) \
53 ? TYPE_LANG_SPECIFIC (NODE) : ggc_alloc (sizeof (struct lang_type)))) \
56 #define GET_DECL_LANG_SPECIFIC(NODE) \
57 (DECL_LANG_SPECIFIC (NODE) ? DECL_LANG_SPECIFIC (NODE)->t : NULL_TREE)
58 #define SET_DECL_LANG_SPECIFIC(NODE, VALUE) \
59 (DECL_LANG_SPECIFIC (NODE) \
60 = (DECL_LANG_SPECIFIC (NODE) \
61 ? DECL_LANG_SPECIFIC (NODE) : ggc_alloc (sizeof (struct lang_decl)))) \
64 /* Flags added to GCC type nodes. */
66 /* For RECORD_TYPE, UNION_TYPE, and QUAL_UNION_TYPE, nonzero if this is a
67 record being used as a fat pointer (only true for RECORD_TYPE). */
68 #define TYPE_IS_FAT_POINTER_P(NODE) \
69 TYPE_LANG_FLAG_0 (RECORD_OR_UNION_CHECK (NODE))
71 #define TYPE_FAT_POINTER_P(NODE) \
72 (TREE_CODE (NODE) == RECORD_TYPE && TYPE_IS_FAT_POINTER_P (NODE))
74 /* For integral types and array types, nonzero if this is a packed array type.
75 Such types should not be extended to a larger size. */
76 #define TYPE_PACKED_ARRAY_TYPE_P(NODE) TYPE_LANG_FLAG_0 (NODE)
78 #define TYPE_IS_PACKED_ARRAY_TYPE_P(NODE) \
79 ((TREE_CODE (NODE) == INTEGER_TYPE || TREE_CODE (NODE) == ARRAY_TYPE) \
80 && TYPE_PACKED_ARRAY_TYPE_P (NODE))
82 /* For INTEGER_TYPE, nonzero if this is a modular type with a modulus that
83 is not equal to two to the power of its mode's size. */
84 #define TYPE_MODULAR_P(NODE) TYPE_LANG_FLAG_1 (INTEGER_TYPE_CHECK (NODE))
86 /* For ARRAY_TYPE, nonzero if this type corresponds to a dimension of
87 an Ada array other than the first. */
88 #define TYPE_MULTI_ARRAY_P(NODE) TYPE_LANG_FLAG_1 (ARRAY_TYPE_CHECK (NODE))
90 /* For FUNCTION_TYPE, nonzero if this denotes a function returning an
91 unconstrained array or record. */
92 #define TYPE_RETURNS_UNCONSTRAINED_P(NODE) \
93 TYPE_LANG_FLAG_1 (FUNCTION_TYPE_CHECK (NODE))
95 /* For RECORD_TYPE, UNION_TYPE, and QUAL_UNION_TYPE, nonzero if this denotes
96 a justified modular type (will only be true for RECORD_TYPE). */
97 #define TYPE_JUSTIFIED_MODULAR_P(NODE) \
98 TYPE_LANG_FLAG_1 (RECORD_OR_UNION_CHECK (NODE))
100 /* Nonzero in an arithmetic subtype if this is a subtype not known to the
102 #define TYPE_EXTRA_SUBTYPE_P(NODE) TYPE_LANG_FLAG_2 (NODE)
104 /* Nonzero for composite types if this is a by-reference type. */
105 #define TYPE_BY_REFERENCE_P(NODE) TYPE_LANG_FLAG_2 (NODE)
107 /* For RECORD_TYPE, UNION_TYPE, and QUAL_UNION_TYPE, nonzero if this is the
108 type for an object whose type includes its template in addition to
109 its value (only true for RECORD_TYPE). */
110 #define TYPE_CONTAINS_TEMPLATE_P(NODE) \
111 TYPE_LANG_FLAG_3 (RECORD_OR_UNION_CHECK (NODE))
113 /* For INTEGER_TYPE, nonzero if this really represents a VAX
114 floating-point type. */
115 #define TYPE_VAX_FLOATING_POINT_P(NODE) \
116 TYPE_LANG_FLAG_3 (INTEGER_TYPE_CHECK (NODE))
118 /* True if NODE is a thin pointer. */
119 #define TYPE_THIN_POINTER_P(NODE) \
120 (POINTER_TYPE_P (NODE) \
121 && TREE_CODE (TREE_TYPE (NODE)) == RECORD_TYPE \
122 && TYPE_CONTAINS_TEMPLATE_P (TREE_TYPE (NODE)))
124 /* True if TYPE is either a fat or thin pointer to an unconstrained
126 #define TYPE_FAT_OR_THIN_POINTER_P(NODE) \
127 (TYPE_FAT_POINTER_P (NODE) || TYPE_THIN_POINTER_P (NODE))
129 /* For INTEGER_TYPEs, nonzero if the type has a biased representation. */
130 #define TYPE_BIASED_REPRESENTATION_P(NODE) \
131 TYPE_LANG_FLAG_4 (INTEGER_TYPE_CHECK (NODE))
133 /* For ARRAY_TYPEs, nonzero if the array type has Convention_Fortran. */
134 #define TYPE_CONVENTION_FORTRAN_P(NODE) \
135 TYPE_LANG_FLAG_4 (ARRAY_TYPE_CHECK (NODE))
137 /* For FUNCTION_TYPEs, nonzero if the function returns by reference. */
138 #define TYPE_RETURNS_BY_REF_P(NODE) \
139 TYPE_LANG_FLAG_4 (FUNCTION_TYPE_CHECK (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 VOID_TYPE, ENUMERAL_TYPE, UNION_TYPE, and RECORD_TYPE, nonzero if this
147 is a dummy type, made to correspond to a private or incomplete type. */
148 #define TYPE_DUMMY_P(NODE) TYPE_LANG_FLAG_4 (NODE)
150 /* True if TYPE is such a dummy type. */
151 #define TYPE_IS_DUMMY_P(NODE) \
152 ((TREE_CODE (NODE) == VOID_TYPE || TREE_CODE (NODE) == RECORD_TYPE \
153 || TREE_CODE (NODE) == UNION_TYPE || TREE_CODE (NODE) == ENUMERAL_TYPE) \
154 && TYPE_DUMMY_P (NODE))
156 /* For an INTEGER_TYPE, nonzero if TYPE_ACTUAL_BOUNDS is present. */
157 #define TYPE_HAS_ACTUAL_BOUNDS_P(NODE) \
158 TYPE_LANG_FLAG_5 (INTEGER_TYPE_CHECK (NODE))
160 /* For a RECORD_TYPE, nonzero if this was made just to supply needed
161 padding or alignment. */
162 #define TYPE_IS_PADDING_P(NODE) TYPE_LANG_FLAG_5 (RECORD_TYPE_CHECK (NODE))
164 /* True if TYPE can alias any other types. */
165 #define TYPE_UNIVERSAL_ALIASING_P(NODE) TYPE_LANG_FLAG_6 (NODE)
167 /* This field is only defined for FUNCTION_TYPE nodes. If the Ada
168 subprogram contains no parameters passed by copy in/copy out then this
169 field is 0. Otherwise it points to a list of nodes used to specify the
170 return values of the out (or in out) parameters that qualify to be passed
171 by copy in copy out. It is a CONSTRUCTOR. For a full description of the
172 cico parameter passing mechanism refer to the routine gnat_to_gnu_entity. */
173 #define TYPE_CI_CO_LIST(NODE) TYPE_LANG_SLOT_1 (FUNCTION_TYPE_CHECK (NODE))
175 /* For an INTEGER_TYPE with TYPE_MODULAR_P, this is the value of the
177 #define TYPE_MODULUS(NODE) GET_TYPE_LANG_SPECIFIC (INTEGER_TYPE_CHECK (NODE))
178 #define SET_TYPE_MODULUS(NODE, X) \
179 SET_TYPE_LANG_SPECIFIC (INTEGER_TYPE_CHECK (NODE), X)
181 /* For an INTEGER_TYPE that is the TYPE_DOMAIN of some ARRAY_TYPE, points to
182 the type corresponding to the Ada index type. */
183 #define TYPE_INDEX_TYPE(NODE) \
184 GET_TYPE_LANG_SPECIFIC (INTEGER_TYPE_CHECK (NODE))
185 #define SET_TYPE_INDEX_TYPE(NODE, X) \
186 SET_TYPE_LANG_SPECIFIC (INTEGER_TYPE_CHECK (NODE), X)
188 /* For an INTEGER_TYPE with TYPE_VAX_FLOATING_POINT_P, stores the
190 #define TYPE_DIGITS_VALUE(NODE) \
191 GET_TYPE_LANG_SPECIFIC (INTEGER_TYPE_CHECK (NODE))
192 #define SET_TYPE_DIGITS_VALUE(NODE, X) \
193 SET_TYPE_LANG_SPECIFIC (INTEGER_TYPE_CHECK (NODE), X)
195 /* For numeric types, stores the RM_Size of the type. */
196 #define TYPE_RM_SIZE_NUM(NODE) TYPE_LANG_SLOT_1 (NUMERICAL_TYPE_CHECK (NODE))
198 #define TYPE_RM_SIZE(NODE) \
199 (INTEGRAL_TYPE_P (NODE) || TREE_CODE (NODE) == REAL_TYPE \
200 ? TYPE_RM_SIZE_NUM (NODE) : 0)
202 /* For a RECORD_TYPE that is a fat pointer, point to the type for the
203 unconstrained object. Likewise for a RECORD_TYPE that is pointed
204 to by a thin pointer. */
205 #define TYPE_UNCONSTRAINED_ARRAY(NODE) \
206 GET_TYPE_LANG_SPECIFIC (RECORD_TYPE_CHECK (NODE))
207 #define SET_TYPE_UNCONSTRAINED_ARRAY(NODE, X) \
208 SET_TYPE_LANG_SPECIFIC (RECORD_TYPE_CHECK (NODE), X)
210 /* For other RECORD_TYPEs and all UNION_TYPEs and QUAL_UNION_TYPEs, the Ada
211 size of the object. This differs from the GCC size in that it does not
212 include any rounding up to the alignment of the type. */
213 #define TYPE_ADA_SIZE(NODE) \
214 GET_TYPE_LANG_SPECIFIC (RECORD_OR_UNION_CHECK (NODE))
215 #define SET_TYPE_ADA_SIZE(NODE, X) \
216 SET_TYPE_LANG_SPECIFIC (RECORD_OR_UNION_CHECK (NODE), X)
218 /* For an INTEGER_TYPE with TYPE_HAS_ACTUAL_BOUNDS_P or an ARRAY_TYPE, this is
219 the index type that should be used when the actual bounds are required for
220 a template. This is used in the case of packed arrays. */
221 #define TYPE_ACTUAL_BOUNDS(NODE) \
222 GET_TYPE_LANG_SPECIFIC (TREE_CHECK2 (NODE, INTEGER_TYPE, ARRAY_TYPE))
223 #define SET_TYPE_ACTUAL_BOUNDS(NODE, X) \
224 SET_TYPE_LANG_SPECIFIC (TREE_CHECK2 (NODE, INTEGER_TYPE, ARRAY_TYPE), X)
226 /* In an UNCONSTRAINED_ARRAY_TYPE, points to the record containing both
227 the template and object.
229 ??? We also put this on an ENUMERAL_TYPE that's dummy. Technically,
230 this is a conflict on the minval field, but there doesn't seem to be
231 simple fix, so we'll live with this kludge for now. */
232 #define TYPE_OBJECT_RECORD_TYPE(NODE) \
233 (TREE_CHECK2 ((NODE), UNCONSTRAINED_ARRAY_TYPE, ENUMERAL_TYPE)->type.minval)
235 /* Nonzero in a FUNCTION_DECL that represents a stubbed function
237 #define DECL_STUBBED_P(NODE) DECL_LANG_FLAG_0 (FUNCTION_DECL_CHECK (NODE))
239 /* Nonzero in a VAR_DECL if it is guaranteed to be constant after having
240 been elaborated and TREE_READONLY is not set on it. */
241 #define DECL_READONLY_ONCE_ELAB(NODE) DECL_LANG_FLAG_0 (VAR_DECL_CHECK (NODE))
243 /* Nonzero if this decl is always used by reference; i.e., an INDIRECT_REF
244 is needed to access the object. */
245 #define DECL_BY_REF_P(NODE) DECL_LANG_FLAG_1 (NODE)
247 /* Nonzero if this decl is a PARM_DECL for an Ada array being passed to a
248 foreign convention subprogram. */
249 #define DECL_BY_COMPONENT_PTR_P(NODE) DECL_LANG_FLAG_2 (PARM_DECL_CHECK (NODE))
251 /* Nonzero in a FIELD_DECL that is a dummy built for some internal reason. */
252 #define DECL_INTERNAL_P(NODE) DECL_LANG_FLAG_3 (FIELD_DECL_CHECK (NODE))
254 /* Nonzero in a FUNCTION_DECL that corresponds to an elaboration procedure. */
255 #define DECL_ELABORATION_PROC_P(NODE) \
256 DECL_LANG_FLAG_3 (FUNCTION_DECL_CHECK (NODE))
258 /* Nonzero if this is a decl for a pointer that points to something which
259 is readonly. Used mostly for fat pointers. */
260 #define DECL_POINTS_TO_READONLY_P(NODE) DECL_LANG_FLAG_4 (NODE)
262 /* Nonzero in a FIELD_DECL if there was a record rep clause. */
263 #define DECL_HAS_REP_P(NODE) DECL_LANG_FLAG_5 (FIELD_DECL_CHECK (NODE))
265 /* Nonzero in a PARM_DECL if we are to pass by descriptor. */
266 #define DECL_BY_DESCRIPTOR_P(NODE) DECL_LANG_FLAG_5 (PARM_DECL_CHECK (NODE))
268 /* Nonzero in a VAR_DECL if it is a pointer renaming a global object. */
269 #define DECL_RENAMING_GLOBAL_P(NODE) DECL_LANG_FLAG_5 (VAR_DECL_CHECK (NODE))
271 /* In a CONST_DECL, points to a VAR_DECL that is allocatable to
272 memory. Used when a scalar constant is aliased or has its
274 #define DECL_CONST_CORRESPONDING_VAR(NODE) \
275 GET_DECL_LANG_SPECIFIC (CONST_DECL_CHECK (NODE))
276 #define SET_DECL_CONST_CORRESPONDING_VAR(NODE, X) \
277 SET_DECL_LANG_SPECIFIC (CONST_DECL_CHECK (NODE), X)
279 /* In a FIELD_DECL, points to the FIELD_DECL that was the ultimate
280 source of the decl. */
281 #define DECL_ORIGINAL_FIELD(NODE) \
282 GET_DECL_LANG_SPECIFIC (FIELD_DECL_CHECK (NODE))
283 #define SET_DECL_ORIGINAL_FIELD(NODE, X) \
284 SET_DECL_LANG_SPECIFIC (FIELD_DECL_CHECK (NODE), X)
286 /* In a VAR_DECL, points to the object being renamed if the VAR_DECL is a
287 renaming pointer, otherwise 0. Note that this object is guaranteed to
288 be protected against multiple evaluations. */
289 #define DECL_RENAMED_OBJECT(NODE) \
290 GET_DECL_LANG_SPECIFIC (VAR_DECL_CHECK (NODE))
291 #define SET_DECL_RENAMED_OBJECT(NODE, X) \
292 SET_DECL_LANG_SPECIFIC (VAR_DECL_CHECK (NODE), X)
294 /* In a FUNCTION_DECL, points to the stub associated with the function
295 if any, otherwise 0. */
296 #define DECL_FUNCTION_STUB(NODE) \
297 GET_DECL_LANG_SPECIFIC (FUNCTION_DECL_CHECK (NODE))
298 #define SET_DECL_FUNCTION_STUB(NODE, X) \
299 SET_DECL_LANG_SPECIFIC (FUNCTION_DECL_CHECK (NODE), X)
301 /* In a FIELD_DECL corresponding to a discriminant, contains the
302 discriminant number. */
303 #define DECL_DISCRIMINANT_NUMBER(NODE) DECL_INITIAL (FIELD_DECL_CHECK (NODE))
305 /* Define fields and macros for statements.
307 Start by defining which tree codes are used for statements. */
308 #define IS_STMT(NODE) (STATEMENT_CLASS_P (NODE))
309 #define IS_ADA_STMT(NODE) (IS_STMT (NODE) \
310 && TREE_CODE (NODE) >= STMT_STMT)
312 #define STMT_STMT_STMT(NODE) TREE_OPERAND_CHECK_CODE (NODE, STMT_STMT, 0)
313 #define LOOP_STMT_TOP_COND(NODE) TREE_OPERAND_CHECK_CODE (NODE, LOOP_STMT, 0)
314 #define LOOP_STMT_BOT_COND(NODE) TREE_OPERAND_CHECK_CODE (NODE, LOOP_STMT, 1)
315 #define LOOP_STMT_UPDATE(NODE) TREE_OPERAND_CHECK_CODE (NODE, LOOP_STMT, 2)
316 #define LOOP_STMT_BODY(NODE) TREE_OPERAND_CHECK_CODE (NODE, LOOP_STMT, 3)
317 #define LOOP_STMT_LABEL(NODE) TREE_OPERAND_CHECK_CODE (NODE, LOOP_STMT, 4)
318 #define EXIT_STMT_COND(NODE) TREE_OPERAND_CHECK_CODE (NODE, EXIT_STMT, 0)
319 #define EXIT_STMT_LABEL(NODE) TREE_OPERAND_CHECK_CODE (NODE, EXIT_STMT, 1)
320 #define REGION_STMT_BODY(NODE) TREE_OPERAND_CHECK_CODE (NODE, REGION_STMT, 0)
321 #define REGION_STMT_HANDLE(NODE) TREE_OPERAND_CHECK_CODE (NODE, REGION_STMT, 1)
322 #define REGION_STMT_BLOCK(NODE) TREE_OPERAND_CHECK_CODE (NODE, REGION_STMT, 2)
323 #define HANDLER_STMT_ARG(NODE) TREE_OPERAND_CHECK_CODE (NODE, HANDLER_STMT, 0)
324 #define HANDLER_STMT_LIST(NODE) TREE_OPERAND_CHECK_CODE (NODE, HANDLER_STMT, 1)
325 #define HANDLER_STMT_BLOCK(NODE) TREE_OPERAND_CHECK_CODE(NODE, HANDLER_STMT, 2)