1 /****************************************************************************
3 * GNAT COMPILER COMPONENTS *
9 * Copyright (C) 1992-2009, 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 /* The resulting tree type. */
27 union GTY((desc ("0"),
28 chain_next ("(union lang_tree_node *)TREE_CHAIN (&%h.generic)")))
31 union tree_node GTY((tag ("0"),
32 desc ("tree_node_structure (&%h)"))) generic;
35 /* Ada uses the lang_decl and lang_type fields to hold a tree. */
36 struct GTY(()) lang_type { tree t; };
37 struct GTY(()) lang_decl { tree t; };
39 /* Macros to get and set the tree in TYPE_LANG_SPECIFIC. */
40 #define GET_TYPE_LANG_SPECIFIC(NODE) \
41 (TYPE_LANG_SPECIFIC (NODE) ? TYPE_LANG_SPECIFIC (NODE)->t : NULL_TREE)
43 #define SET_TYPE_LANG_SPECIFIC(NODE, X) \
44 (TYPE_LANG_SPECIFIC (NODE) \
45 = (TYPE_LANG_SPECIFIC (NODE) \
46 ? TYPE_LANG_SPECIFIC (NODE) : GGC_NEW (struct lang_type)))->t = (X)
48 /* Macros to get and set the tree in DECL_LANG_SPECIFIC. */
49 #define GET_DECL_LANG_SPECIFIC(NODE) \
50 (DECL_LANG_SPECIFIC (NODE) ? DECL_LANG_SPECIFIC (NODE)->t : NULL_TREE)
52 #define SET_DECL_LANG_SPECIFIC(NODE, X) \
53 (DECL_LANG_SPECIFIC (NODE) \
54 = (DECL_LANG_SPECIFIC (NODE) \
55 ? DECL_LANG_SPECIFIC (NODE) : GGC_NEW (struct lang_decl)))->t = (X)
58 /* Flags added to type nodes. */
60 /* For RECORD_TYPE, UNION_TYPE, and QUAL_UNION_TYPE, nonzero if this is a
61 record being used as a fat pointer (only true for RECORD_TYPE). */
62 #define TYPE_IS_FAT_POINTER_P(NODE) \
63 TYPE_LANG_FLAG_0 (RECORD_OR_UNION_CHECK (NODE))
65 #define TYPE_FAT_POINTER_P(NODE) \
66 (TREE_CODE (NODE) == RECORD_TYPE && TYPE_IS_FAT_POINTER_P (NODE))
68 /* For integral types and array types, nonzero if this is a packed array type
69 used for bit-packed types. Such types should not be extended to a larger
70 size or validated against a specified size. */
71 #define TYPE_PACKED_ARRAY_TYPE_P(NODE) TYPE_LANG_FLAG_0 (NODE)
73 #define TYPE_IS_PACKED_ARRAY_TYPE_P(NODE) \
74 ((TREE_CODE (NODE) == INTEGER_TYPE || TREE_CODE (NODE) == ARRAY_TYPE) \
75 && TYPE_PACKED_ARRAY_TYPE_P (NODE))
77 /* For INTEGER_TYPE, nonzero if this is a modular type with a modulus that
78 is not equal to two to the power of its mode's size. */
79 #define TYPE_MODULAR_P(NODE) TYPE_LANG_FLAG_1 (INTEGER_TYPE_CHECK (NODE))
81 /* For ARRAY_TYPE, nonzero if this type corresponds to a dimension of
82 an Ada array other than the first. */
83 #define TYPE_MULTI_ARRAY_P(NODE) TYPE_LANG_FLAG_1 (ARRAY_TYPE_CHECK (NODE))
85 /* For FUNCTION_TYPE, nonzero if this denotes a function returning an
86 unconstrained array or record. */
87 #define TYPE_RETURNS_UNCONSTRAINED_P(NODE) \
88 TYPE_LANG_FLAG_1 (FUNCTION_TYPE_CHECK (NODE))
90 /* For RECORD_TYPE, UNION_TYPE, and QUAL_UNION_TYPE, nonzero if this denotes
91 a justified modular type (will only be true for RECORD_TYPE). */
92 #define TYPE_JUSTIFIED_MODULAR_P(NODE) \
93 TYPE_LANG_FLAG_1 (RECORD_OR_UNION_CHECK (NODE))
95 /* Nonzero in an arithmetic subtype if this is a subtype not known to the
97 #define TYPE_EXTRA_SUBTYPE_P(NODE) TYPE_LANG_FLAG_2 (NODE)
99 /* Nonzero for composite types if this is a by-reference type. */
100 #define TYPE_BY_REFERENCE_P(NODE) TYPE_LANG_FLAG_2 (NODE)
102 /* For RECORD_TYPE, UNION_TYPE, and QUAL_UNION_TYPE, nonzero if this is the
103 type for an object whose type includes its template in addition to
104 its value (only true for RECORD_TYPE). */
105 #define TYPE_CONTAINS_TEMPLATE_P(NODE) \
106 TYPE_LANG_FLAG_3 (RECORD_OR_UNION_CHECK (NODE))
108 /* For INTEGER_TYPE, nonzero if this really represents a VAX
109 floating-point type. */
110 #define TYPE_VAX_FLOATING_POINT_P(NODE) \
111 TYPE_LANG_FLAG_3 (INTEGER_TYPE_CHECK (NODE))
113 /* True if NODE is a thin pointer. */
114 #define TYPE_THIN_POINTER_P(NODE) \
115 (POINTER_TYPE_P (NODE) \
116 && TREE_CODE (TREE_TYPE (NODE)) == RECORD_TYPE \
117 && TYPE_CONTAINS_TEMPLATE_P (TREE_TYPE (NODE)))
119 /* True if TYPE is either a fat or thin pointer to an unconstrained
121 #define TYPE_FAT_OR_THIN_POINTER_P(NODE) \
122 (TYPE_FAT_POINTER_P (NODE) || TYPE_THIN_POINTER_P (NODE))
124 /* For INTEGER_TYPEs, nonzero if the type has a biased representation. */
125 #define TYPE_BIASED_REPRESENTATION_P(NODE) \
126 TYPE_LANG_FLAG_4 (INTEGER_TYPE_CHECK (NODE))
128 /* For ARRAY_TYPEs, nonzero if the array type has Convention_Fortran. */
129 #define TYPE_CONVENTION_FORTRAN_P(NODE) \
130 TYPE_LANG_FLAG_4 (ARRAY_TYPE_CHECK (NODE))
132 /* For FUNCTION_TYPEs, nonzero if the function returns by reference. */
133 #define TYPE_RETURNS_BY_REF_P(NODE) \
134 TYPE_LANG_FLAG_4 (FUNCTION_TYPE_CHECK (NODE))
136 /* For VOID_TYPE, ENUMERAL_TYPE, UNION_TYPE, and RECORD_TYPE, nonzero if this
137 is a dummy type, made to correspond to a private or incomplete type. */
138 #define TYPE_DUMMY_P(NODE) TYPE_LANG_FLAG_4 (NODE)
140 /* True if TYPE is such a dummy type. */
141 #define TYPE_IS_DUMMY_P(NODE) \
142 ((TREE_CODE (NODE) == VOID_TYPE || TREE_CODE (NODE) == RECORD_TYPE \
143 || TREE_CODE (NODE) == UNION_TYPE || TREE_CODE (NODE) == ENUMERAL_TYPE) \
144 && TYPE_DUMMY_P (NODE))
146 /* For FUNCTION_TYPEs, nonzero if function returns by being passed a pointer
147 to a place to store its result. */
148 #define TYPE_RETURNS_BY_TARGET_PTR_P(NODE) \
149 TYPE_LANG_FLAG_5 (FUNCTION_TYPE_CHECK (NODE))
151 /* For an INTEGER_TYPE, nonzero if TYPE_ACTUAL_BOUNDS is present. */
152 #define TYPE_HAS_ACTUAL_BOUNDS_P(NODE) \
153 TYPE_LANG_FLAG_5 (INTEGER_TYPE_CHECK (NODE))
155 /* For a RECORD_TYPE, nonzero if this was made just to supply needed
156 padding or alignment. */
157 #define TYPE_IS_PADDING_P(NODE) TYPE_LANG_FLAG_5 (RECORD_TYPE_CHECK (NODE))
159 /* True if TYPE can alias any other types. */
160 #define TYPE_UNIVERSAL_ALIASING_P(NODE) TYPE_LANG_FLAG_6 (NODE)
162 /* This field is only defined for FUNCTION_TYPE nodes. If the Ada subprogram
163 contains no parameters passed by copy in/copy out then this field is zero.
164 Otherwise it points to a list of nodes used to specify the return values
165 of the out (or in out) parameters that qualify to be passed by copy in/
166 copy out. For a full description of the copy in/copy out parameter passing
167 mechanism refer to the routine gnat_to_gnu_entity. */
168 #define TYPE_CI_CO_LIST(NODE) TYPE_LANG_SLOT_1 (FUNCTION_TYPE_CHECK (NODE))
170 /* For integral types, this is the RM size of the type. */
171 #define TYPE_RM_SIZE(NODE) \
172 TYPE_LANG_SLOT_1 (TREE_CHECK3 (NODE, ENUMERAL_TYPE, BOOLEAN_TYPE, INTEGER_TYPE))
174 /* In an UNCONSTRAINED_ARRAY_TYPE, points to the record containing both
175 the template and object.
177 ??? We also put this on an ENUMERAL_TYPE that's dummy. Technically,
178 this is a conflict on the minval field, but there doesn't seem to be
179 simple fix, so we'll live with this kludge for now. */
180 #define TYPE_OBJECT_RECORD_TYPE(NODE) \
181 (TREE_CHECK2 ((NODE), UNCONSTRAINED_ARRAY_TYPE, ENUMERAL_TYPE)->type.minval)
183 /* For an INTEGER_TYPE with TYPE_MODULAR_P, this is the value of the
185 #define TYPE_MODULUS(NODE) GET_TYPE_LANG_SPECIFIC (INTEGER_TYPE_CHECK (NODE))
186 #define SET_TYPE_MODULUS(NODE, X) \
187 SET_TYPE_LANG_SPECIFIC (INTEGER_TYPE_CHECK (NODE), X)
189 /* For an INTEGER_TYPE with TYPE_VAX_FLOATING_POINT_P, this is the
191 #define TYPE_DIGITS_VALUE(NODE) \
192 GET_TYPE_LANG_SPECIFIC (INTEGER_TYPE_CHECK (NODE))
193 #define SET_TYPE_DIGITS_VALUE(NODE, X) \
194 SET_TYPE_LANG_SPECIFIC (INTEGER_TYPE_CHECK (NODE), X)
196 /* For an INTEGER_TYPE that is the TYPE_DOMAIN of some ARRAY_TYPE, this is
197 the type corresponding to the Ada index type. */
198 #define TYPE_INDEX_TYPE(NODE) \
199 GET_TYPE_LANG_SPECIFIC (INTEGER_TYPE_CHECK (NODE))
200 #define SET_TYPE_INDEX_TYPE(NODE, X) \
201 SET_TYPE_LANG_SPECIFIC (INTEGER_TYPE_CHECK (NODE), X)
203 /* For an INTEGER_TYPE with TYPE_HAS_ACTUAL_BOUNDS_P or an ARRAY_TYPE, this is
204 the index type that should be used when the actual bounds are required for
205 a template. This is used in the case of packed arrays. */
206 #define TYPE_ACTUAL_BOUNDS(NODE) \
207 GET_TYPE_LANG_SPECIFIC (TREE_CHECK2 (NODE, INTEGER_TYPE, ARRAY_TYPE))
208 #define SET_TYPE_ACTUAL_BOUNDS(NODE, X) \
209 SET_TYPE_LANG_SPECIFIC (TREE_CHECK2 (NODE, INTEGER_TYPE, ARRAY_TYPE), X)
211 /* For a RECORD_TYPE that is a fat pointer, point to the type for the
212 unconstrained object. Likewise for a RECORD_TYPE that is pointed
213 to by a thin pointer. */
214 #define TYPE_UNCONSTRAINED_ARRAY(NODE) \
215 GET_TYPE_LANG_SPECIFIC (RECORD_TYPE_CHECK (NODE))
216 #define SET_TYPE_UNCONSTRAINED_ARRAY(NODE, X) \
217 SET_TYPE_LANG_SPECIFIC (RECORD_TYPE_CHECK (NODE), X)
219 /* For other RECORD_TYPEs and all UNION_TYPEs and QUAL_UNION_TYPEs, the Ada
220 size of the object. This differs from the GCC size in that it does not
221 include any rounding up to the alignment of the type. */
222 #define TYPE_ADA_SIZE(NODE) \
223 GET_TYPE_LANG_SPECIFIC (RECORD_OR_UNION_CHECK (NODE))
224 #define SET_TYPE_ADA_SIZE(NODE, X) \
225 SET_TYPE_LANG_SPECIFIC (RECORD_OR_UNION_CHECK (NODE), X)
228 /* Flags added to decl nodes. */
230 /* Nonzero in a FUNCTION_DECL that represents a stubbed function
232 #define DECL_STUBBED_P(NODE) DECL_LANG_FLAG_0 (FUNCTION_DECL_CHECK (NODE))
234 /* Nonzero in a VAR_DECL if it is guaranteed to be constant after having
235 been elaborated and TREE_READONLY is not set on it. */
236 #define DECL_READONLY_ONCE_ELAB(NODE) DECL_LANG_FLAG_0 (VAR_DECL_CHECK (NODE))
238 /* Nonzero if this decl is always used by reference; i.e., an INDIRECT_REF
239 is needed to access the object. */
240 #define DECL_BY_REF_P(NODE) DECL_LANG_FLAG_1 (NODE)
242 /* Nonzero in a FIELD_DECL that is a dummy built for some internal reason. */
243 #define DECL_INTERNAL_P(NODE) DECL_LANG_FLAG_3 (FIELD_DECL_CHECK (NODE))
245 /* Nonzero if this decl is a PARM_DECL for an Ada array being passed to a
246 foreign convention subprogram. */
247 #define DECL_BY_COMPONENT_PTR_P(NODE) DECL_LANG_FLAG_3 (PARM_DECL_CHECK (NODE))
249 /* Nonzero in a FUNCTION_DECL that corresponds to an elaboration procedure. */
250 #define DECL_ELABORATION_PROC_P(NODE) \
251 DECL_LANG_FLAG_3 (FUNCTION_DECL_CHECK (NODE))
253 /* Nonzero if this is a decl for a pointer that points to something which
254 is readonly. Used mostly for fat pointers. */
255 #define DECL_POINTS_TO_READONLY_P(NODE) DECL_LANG_FLAG_4 (NODE)
257 /* Nonzero in a PARM_DECL if we are to pass by descriptor. */
258 #define DECL_BY_DESCRIPTOR_P(NODE) DECL_LANG_FLAG_5 (PARM_DECL_CHECK (NODE))
260 /* Nonzero in a VAR_DECL if it is a pointer renaming a global object. */
261 #define DECL_RENAMING_GLOBAL_P(NODE) DECL_LANG_FLAG_5 (VAR_DECL_CHECK (NODE))
263 /* In a FIELD_DECL corresponding to a discriminant, contains the
264 discriminant number. */
265 #define DECL_DISCRIMINANT_NUMBER(NODE) DECL_INITIAL (FIELD_DECL_CHECK (NODE))
267 /* In a CONST_DECL, points to a VAR_DECL that is allocatable to
268 memory. Used when a scalar constant is aliased or has its
270 #define DECL_CONST_CORRESPONDING_VAR(NODE) \
271 GET_DECL_LANG_SPECIFIC (CONST_DECL_CHECK (NODE))
272 #define SET_DECL_CONST_CORRESPONDING_VAR(NODE, X) \
273 SET_DECL_LANG_SPECIFIC (CONST_DECL_CHECK (NODE), X)
275 /* In a FIELD_DECL, points to the FIELD_DECL that was the ultimate
276 source of the decl. */
277 #define DECL_ORIGINAL_FIELD(NODE) \
278 GET_DECL_LANG_SPECIFIC (FIELD_DECL_CHECK (NODE))
279 #define SET_DECL_ORIGINAL_FIELD(NODE, X) \
280 SET_DECL_LANG_SPECIFIC (FIELD_DECL_CHECK (NODE), X)
282 /* In a VAR_DECL, points to the object being renamed if the VAR_DECL is a
283 renaming pointer, otherwise 0. Note that this object is guaranteed to
284 be protected against multiple evaluations. */
285 #define DECL_RENAMED_OBJECT(NODE) \
286 GET_DECL_LANG_SPECIFIC (VAR_DECL_CHECK (NODE))
287 #define SET_DECL_RENAMED_OBJECT(NODE, X) \
288 SET_DECL_LANG_SPECIFIC (VAR_DECL_CHECK (NODE), X)
290 /* In a TYPE_DECL, points to the parallel type if any, otherwise 0. */
291 #define DECL_PARALLEL_TYPE(NODE) \
292 GET_DECL_LANG_SPECIFIC (TYPE_DECL_CHECK (NODE))
293 #define SET_DECL_PARALLEL_TYPE(NODE, X) \
294 SET_DECL_LANG_SPECIFIC (TYPE_DECL_CHECK (NODE), X)
296 /* In a FUNCTION_DECL, points to the stub associated with the function
297 if any, otherwise 0. */
298 #define DECL_FUNCTION_STUB(NODE) \
299 GET_DECL_LANG_SPECIFIC (FUNCTION_DECL_CHECK (NODE))
300 #define SET_DECL_FUNCTION_STUB(NODE, X) \
301 SET_DECL_LANG_SPECIFIC (FUNCTION_DECL_CHECK (NODE), X)
303 /* In a PARM_DECL, points to the alternate TREE_TYPE. */
304 #define DECL_PARM_ALT_TYPE(NODE) \
305 GET_DECL_LANG_SPECIFIC (PARM_DECL_CHECK (NODE))
306 #define SET_DECL_PARM_ALT_TYPE(NODE, X) \
307 SET_DECL_LANG_SPECIFIC (PARM_DECL_CHECK (NODE), X)
310 /* Fields and macros for statements. */
311 #define IS_ADA_STMT(NODE) \
312 (STATEMENT_CLASS_P (NODE) && TREE_CODE (NODE) >= STMT_STMT)
314 #define STMT_STMT_STMT(NODE) TREE_OPERAND_CHECK_CODE (NODE, STMT_STMT, 0)
315 #define LOOP_STMT_TOP_COND(NODE) TREE_OPERAND_CHECK_CODE (NODE, LOOP_STMT, 0)
316 #define LOOP_STMT_BOT_COND(NODE) TREE_OPERAND_CHECK_CODE (NODE, LOOP_STMT, 1)
317 #define LOOP_STMT_UPDATE(NODE) TREE_OPERAND_CHECK_CODE (NODE, LOOP_STMT, 2)
318 #define LOOP_STMT_BODY(NODE) TREE_OPERAND_CHECK_CODE (NODE, LOOP_STMT, 3)
319 #define LOOP_STMT_LABEL(NODE) TREE_OPERAND_CHECK_CODE (NODE, LOOP_STMT, 4)
320 #define EXIT_STMT_COND(NODE) TREE_OPERAND_CHECK_CODE (NODE, EXIT_STMT, 0)
321 #define EXIT_STMT_LABEL(NODE) TREE_OPERAND_CHECK_CODE (NODE, EXIT_STMT, 1)