316 lines
14 KiB
C
316 lines
14 KiB
C
/****************************************************************************
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* *
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* GNAT COMPILER COMPONENTS *
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* *
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* A D A - T R E E *
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* *
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* C Header File *
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* *
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* Copyright (C) 1992-2006 Free Software Foundation, Inc. *
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* *
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* GNAT is free software; you can redistribute it and/or modify it under *
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* terms of the GNU General Public License as published by the Free Soft- *
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* ware Foundation; either version 2, or (at your option) any later ver- *
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* sion. GNAT is distributed in the hope that it will be useful, but WITH- *
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* OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY *
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License *
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* for more details. You should have received a copy of the GNU General *
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* Public License distributed with GNAT; see file COPYING. If not, write *
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* to the Free Software Foundation, 51 Franklin Street, Fifth Floor, *
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* Boston, MA 02110-1301, USA. *
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* *
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* GNAT was originally developed by the GNAT team at New York University. *
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* Extensive contributions were provided by Ada Core Technologies Inc. *
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* *
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****************************************************************************/
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/* Ada language-specific GC tree codes. */
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#define DEFTREECODE(SYM, NAME, TYPE, LENGTH) SYM,
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enum gnat_tree_code {
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__DUMMY = LAST_AND_UNUSED_TREE_CODE,
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#include "ada-tree.def"
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LAST_GNAT_TREE_CODE
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};
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#undef DEFTREECODE
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/* Ada uses the lang_decl and lang_type fields to hold a tree. */
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union lang_tree_node
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GTY((desc ("0"),
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chain_next ("(GIMPLE_STMT_P (&%h.t) ? (union lang_tree_node *) 0 : (union lang_tree_node *)TREE_CHAIN (&%h.t))")))
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{
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union tree_node GTY((tag ("0"))) t;
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};
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struct lang_decl GTY(()) {tree t; };
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struct lang_type GTY(()) {tree t; };
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/* Define macros to get and set the tree in TYPE_ and DECL_LANG_SPECIFIC. */
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#define GET_TYPE_LANG_SPECIFIC(NODE) \
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(TYPE_LANG_SPECIFIC (NODE) ? TYPE_LANG_SPECIFIC (NODE)->t : NULL_TREE)
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#define SET_TYPE_LANG_SPECIFIC(NODE, X) \
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(TYPE_LANG_SPECIFIC (NODE) \
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= (TYPE_LANG_SPECIFIC (NODE) \
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? TYPE_LANG_SPECIFIC (NODE) : ggc_alloc (sizeof (struct lang_type)))) \
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->t = X;
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#define GET_DECL_LANG_SPECIFIC(NODE) \
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(DECL_LANG_SPECIFIC (NODE) ? DECL_LANG_SPECIFIC (NODE)->t : NULL_TREE)
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#define SET_DECL_LANG_SPECIFIC(NODE, VALUE) \
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(DECL_LANG_SPECIFIC (NODE) \
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= (DECL_LANG_SPECIFIC (NODE) \
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? DECL_LANG_SPECIFIC (NODE) : ggc_alloc (sizeof (struct lang_decl)))) \
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->t = VALUE;
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/* Flags added to GCC type nodes. */
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/* For RECORD_TYPE, UNION_TYPE, and QUAL_UNION_TYPE, nonzero if this is a
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record being used as a fat pointer (only true for RECORD_TYPE). */
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#define TYPE_IS_FAT_POINTER_P(NODE) \
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TYPE_LANG_FLAG_0 (RECORD_OR_UNION_CHECK (NODE))
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#define TYPE_FAT_POINTER_P(NODE) \
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(TREE_CODE (NODE) == RECORD_TYPE && TYPE_IS_FAT_POINTER_P (NODE))
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/* For integral types and array types, nonzero if this is a packed array type.
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Such types should not be extended to a larger size. */
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#define TYPE_PACKED_ARRAY_TYPE_P(NODE) TYPE_LANG_FLAG_0 (NODE)
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#define TYPE_IS_PACKED_ARRAY_TYPE_P(NODE) \
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((TREE_CODE (NODE) == INTEGER_TYPE || TREE_CODE (NODE) == ARRAY_TYPE) \
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&& TYPE_PACKED_ARRAY_TYPE_P (NODE))
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/* For INTEGER_TYPE, nonzero if this is a modular type with a modulus that
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is not equal to two to the power of its mode's size. */
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#define TYPE_MODULAR_P(NODE) TYPE_LANG_FLAG_1 (INTEGER_TYPE_CHECK (NODE))
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/* For ARRAY_TYPE, nonzero if this type corresponds to a dimension of
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an Ada array other than the first. */
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#define TYPE_MULTI_ARRAY_P(NODE) TYPE_LANG_FLAG_1 (ARRAY_TYPE_CHECK (NODE))
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/* For FUNCTION_TYPE, nonzero if this denotes a function returning an
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unconstrained array or record. */
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#define TYPE_RETURNS_UNCONSTRAINED_P(NODE) \
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TYPE_LANG_FLAG_1 (FUNCTION_TYPE_CHECK (NODE))
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/* For RECORD_TYPE, UNION_TYPE, and QUAL_UNION_TYPE, nonzero if this denotes
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a justified modular type (will only be true for RECORD_TYPE). */
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#define TYPE_JUSTIFIED_MODULAR_P(NODE) \
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TYPE_LANG_FLAG_1 (RECORD_OR_UNION_CHECK (NODE))
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/* Nonzero in an arithmetic subtype if this is a subtype not known to the
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front-end. */
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#define TYPE_EXTRA_SUBTYPE_P(NODE) TYPE_LANG_FLAG_2 (NODE)
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/* Nonzero for composite types if this is a by-reference type. */
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#define TYPE_BY_REFERENCE_P(NODE) TYPE_LANG_FLAG_2 (NODE)
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/* For RECORD_TYPE, UNION_TYPE, and QUAL_UNION_TYPE, nonzero if this is the
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type for an object whose type includes its template in addition to
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its value (only true for RECORD_TYPE). */
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#define TYPE_CONTAINS_TEMPLATE_P(NODE) \
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TYPE_LANG_FLAG_3 (RECORD_OR_UNION_CHECK (NODE))
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/* For INTEGER_TYPE, nonzero if this really represents a VAX
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floating-point type. */
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#define TYPE_VAX_FLOATING_POINT_P(NODE) \
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TYPE_LANG_FLAG_3 (INTEGER_TYPE_CHECK (NODE))
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/* True if NODE is a thin pointer. */
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#define TYPE_THIN_POINTER_P(NODE) \
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(POINTER_TYPE_P (NODE) \
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&& TREE_CODE (TREE_TYPE (NODE)) == RECORD_TYPE \
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&& TYPE_CONTAINS_TEMPLATE_P (TREE_TYPE (NODE)))
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/* True if TYPE is either a fat or thin pointer to an unconstrained
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array. */
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#define TYPE_FAT_OR_THIN_POINTER_P(NODE) \
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(TYPE_FAT_POINTER_P (NODE) || TYPE_THIN_POINTER_P (NODE))
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/* For INTEGER_TYPEs, nonzero if the type has a biased representation. */
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#define TYPE_BIASED_REPRESENTATION_P(NODE) \
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TYPE_LANG_FLAG_4 (INTEGER_TYPE_CHECK (NODE))
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/* For ARRAY_TYPEs, nonzero if the array type has Convention_Fortran. */
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#define TYPE_CONVENTION_FORTRAN_P(NODE) \
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TYPE_LANG_FLAG_4 (ARRAY_TYPE_CHECK (NODE))
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/* For FUNCTION_TYPEs, nonzero if the function returns by reference. */
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#define TYPE_RETURNS_BY_REF_P(NODE) \
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TYPE_LANG_FLAG_4 (FUNCTION_TYPE_CHECK (NODE))
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/* For FUNCTION_TYPEs, nonzero if function returns by being passed a pointer
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to a place to store its result. */
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#define TYPE_RETURNS_BY_TARGET_PTR_P(NODE) \
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TYPE_LANG_FLAG_5 (FUNCTION_TYPE_CHECK (NODE))
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/* For VOID_TYPE, ENUMERAL_TYPE, UNION_TYPE, and RECORD_TYPE, nonzero if this
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is a dummy type, made to correspond to a private or incomplete type. */
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#define TYPE_DUMMY_P(NODE) TYPE_LANG_FLAG_4 (NODE)
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/* True if TYPE is such a dummy type. */
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#define TYPE_IS_DUMMY_P(NODE) \
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((TREE_CODE (NODE) == VOID_TYPE || TREE_CODE (NODE) == RECORD_TYPE \
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|| TREE_CODE (NODE) == UNION_TYPE || TREE_CODE (NODE) == ENUMERAL_TYPE) \
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&& TYPE_DUMMY_P (NODE))
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/* For an INTEGER_TYPE, nonzero if TYPE_ACTUAL_BOUNDS is present. */
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#define TYPE_HAS_ACTUAL_BOUNDS_P(NODE) \
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TYPE_LANG_FLAG_5 (INTEGER_TYPE_CHECK (NODE))
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/* For a RECORD_TYPE, nonzero if this was made just to supply needed
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padding or alignment. */
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#define TYPE_IS_PADDING_P(NODE) TYPE_LANG_FLAG_5 (RECORD_TYPE_CHECK (NODE))
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/* This field is only defined for FUNCTION_TYPE nodes. If the Ada
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subprogram contains no parameters passed by copy in/copy out then this
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field is 0. Otherwise it points to a list of nodes used to specify the
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return values of the out (or in out) parameters that qualify to be passed
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by copy in copy out. It is a CONSTRUCTOR. For a full description of the
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cico parameter passing mechanism refer to the routine gnat_to_gnu_entity. */
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#define TYPE_CI_CO_LIST(NODE) TYPE_LANG_SLOT_1 (FUNCTION_TYPE_CHECK (NODE))
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/* For an INTEGER_TYPE with TYPE_MODULAR_P, this is the value of the
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modulus. */
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#define TYPE_MODULUS(NODE) GET_TYPE_LANG_SPECIFIC (INTEGER_TYPE_CHECK (NODE))
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#define SET_TYPE_MODULUS(NODE, X) \
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SET_TYPE_LANG_SPECIFIC (INTEGER_TYPE_CHECK (NODE), X)
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/* For an INTEGER_TYPE that is the TYPE_DOMAIN of some ARRAY_TYPE, points to
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the type corresponding to the Ada index type. */
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#define TYPE_INDEX_TYPE(NODE) \
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GET_TYPE_LANG_SPECIFIC (INTEGER_TYPE_CHECK (NODE))
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#define SET_TYPE_INDEX_TYPE(NODE, X) \
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SET_TYPE_LANG_SPECIFIC (INTEGER_TYPE_CHECK (NODE), X)
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/* For an INTEGER_TYPE with TYPE_VAX_FLOATING_POINT_P, stores the
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Digits_Value. */
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#define TYPE_DIGITS_VALUE(NODE) \
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GET_TYPE_LANG_SPECIFIC (INTEGER_TYPE_CHECK (NODE))
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#define SET_TYPE_DIGITS_VALUE(NODE, X) \
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SET_TYPE_LANG_SPECIFIC (INTEGER_TYPE_CHECK (NODE), X)
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/* For numeric types, stores the RM_Size of the type. */
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#define TYPE_RM_SIZE_NUM(NODE) TYPE_LANG_SLOT_1 (NUMERICAL_TYPE_CHECK (NODE))
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#define TYPE_RM_SIZE(NODE) \
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(INTEGRAL_TYPE_P (NODE) || TREE_CODE (NODE) == REAL_TYPE \
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? TYPE_RM_SIZE_NUM (NODE) : 0)
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/* For a RECORD_TYPE that is a fat pointer, point to the type for the
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unconstrained object. Likewise for a RECORD_TYPE that is pointed
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to by a thin pointer. */
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#define TYPE_UNCONSTRAINED_ARRAY(NODE) \
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GET_TYPE_LANG_SPECIFIC (RECORD_TYPE_CHECK (NODE))
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#define SET_TYPE_UNCONSTRAINED_ARRAY(NODE, X) \
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SET_TYPE_LANG_SPECIFIC (RECORD_TYPE_CHECK (NODE), X)
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/* For other RECORD_TYPEs and all UNION_TYPEs and QUAL_UNION_TYPEs, the Ada
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size of the object. This differs from the GCC size in that it does not
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include any rounding up to the alignment of the type. */
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#define TYPE_ADA_SIZE(NODE) \
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GET_TYPE_LANG_SPECIFIC (RECORD_OR_UNION_CHECK (NODE))
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#define SET_TYPE_ADA_SIZE(NODE, X) \
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SET_TYPE_LANG_SPECIFIC (RECORD_OR_UNION_CHECK (NODE), X)
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/* For an INTEGER_TYPE with TYPE_HAS_ACTUAL_BOUNDS_P or an ARRAY_TYPE, this is
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the index type that should be used when the actual bounds are required for
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a template. This is used in the case of packed arrays. */
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#define TYPE_ACTUAL_BOUNDS(NODE) \
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GET_TYPE_LANG_SPECIFIC (TREE_CHECK2 (NODE, INTEGER_TYPE, ARRAY_TYPE))
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#define SET_TYPE_ACTUAL_BOUNDS(NODE, X) \
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SET_TYPE_LANG_SPECIFIC (TREE_CHECK2 (NODE, INTEGER_TYPE, ARRAY_TYPE), X)
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/* In an UNCONSTRAINED_ARRAY_TYPE, points to the record containing both
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the template and object.
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??? We also put this on an ENUMERAL_TYPE that's dummy. Technically,
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this is a conflict on the minval field, but there doesn't seem to be
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simple fix, so we'll live with this kludge for now. */
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#define TYPE_OBJECT_RECORD_TYPE(NODE) \
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(TREE_CHECK2 ((NODE), UNCONSTRAINED_ARRAY_TYPE, ENUMERAL_TYPE)->type.minval)
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/* Nonzero in a FUNCTION_DECL that represents a stubbed function
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discriminant. */
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#define DECL_STUBBED_P(NODE) DECL_LANG_FLAG_0 (FUNCTION_DECL_CHECK (NODE))
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/* Nonzero in a VAR_DECL if it is guaranteed to be constant after having
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been elaborated and TREE_READONLY is not set on it. */
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#define DECL_READONLY_ONCE_ELAB(NODE) DECL_LANG_FLAG_0 (VAR_DECL_CHECK (NODE))
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/* Nonzero if this decl is always used by reference; i.e., an INDIRECT_REF
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is needed to access the object. */
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#define DECL_BY_REF_P(NODE) DECL_LANG_FLAG_1 (NODE)
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/* Nonzero if this decl is a PARM_DECL for an Ada array being passed to a
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foreign convention subprogram. */
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#define DECL_BY_COMPONENT_PTR_P(NODE) DECL_LANG_FLAG_2 (PARM_DECL_CHECK (NODE))
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/* Nonzero in a FIELD_DECL that is a dummy built for some internal reason. */
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#define DECL_INTERNAL_P(NODE) DECL_LANG_FLAG_3 (FIELD_DECL_CHECK (NODE))
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/* Nonzero in a FUNCTION_DECL that corresponds to an elaboration procedure. */
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#define DECL_ELABORATION_PROC_P(NODE) \
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DECL_LANG_FLAG_3 (FUNCTION_DECL_CHECK (NODE))
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/* Nonzero if this is a decl for a pointer that points to something which
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is readonly. Used mostly for fat pointers. */
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#define DECL_POINTS_TO_READONLY_P(NODE) DECL_LANG_FLAG_4 (NODE)
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/* Nonzero in a FIELD_DECL if there was a record rep clause. */
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#define DECL_HAS_REP_P(NODE) DECL_LANG_FLAG_5 (FIELD_DECL_CHECK (NODE))
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/* Nonzero in a PARM_DECL if we are to pass by descriptor. */
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#define DECL_BY_DESCRIPTOR_P(NODE) DECL_LANG_FLAG_5 (PARM_DECL_CHECK (NODE))
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/* Nonzero in a VAR_DECL if it is a pointer renaming a global object. */
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#define DECL_RENAMING_GLOBAL_P(NODE) DECL_LANG_FLAG_5 (VAR_DECL_CHECK (NODE))
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/* In a CONST_DECL, points to a VAR_DECL that is allocatable to
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memory. Used when a scalar constant is aliased or has its
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address taken. */
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#define DECL_CONST_CORRESPONDING_VAR(NODE) \
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GET_DECL_LANG_SPECIFIC (CONST_DECL_CHECK (NODE))
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#define SET_DECL_CONST_CORRESPONDING_VAR(NODE, X) \
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SET_DECL_LANG_SPECIFIC (CONST_DECL_CHECK (NODE), X)
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/* In a FIELD_DECL, points to the FIELD_DECL that was the ultimate
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source of the decl. */
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#define DECL_ORIGINAL_FIELD(NODE) \
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GET_DECL_LANG_SPECIFIC (FIELD_DECL_CHECK (NODE))
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#define SET_DECL_ORIGINAL_FIELD(NODE, X) \
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SET_DECL_LANG_SPECIFIC (FIELD_DECL_CHECK (NODE), X)
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/* In a VAR_DECL, points to the object being renamed if the VAR_DECL is a
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renaming pointer, otherwise 0. Note that this object is guaranteed to
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be protected against multiple evaluations. */
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#define DECL_RENAMED_OBJECT(NODE) \
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GET_DECL_LANG_SPECIFIC (VAR_DECL_CHECK (NODE))
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#define SET_DECL_RENAMED_OBJECT(NODE, X) \
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SET_DECL_LANG_SPECIFIC (VAR_DECL_CHECK (NODE), X)
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/* In a FIELD_DECL corresponding to a discriminant, contains the
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discriminant number. */
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#define DECL_DISCRIMINANT_NUMBER(NODE) DECL_INITIAL (FIELD_DECL_CHECK (NODE))
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/* Define fields and macros for statements.
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Start by defining which tree codes are used for statements. */
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#define IS_STMT(NODE) (STATEMENT_CLASS_P (NODE))
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#define IS_ADA_STMT(NODE) (IS_STMT (NODE) \
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&& TREE_CODE (NODE) >= STMT_STMT)
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#define STMT_STMT_STMT(NODE) TREE_OPERAND_CHECK_CODE (NODE, STMT_STMT, 0)
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#define LOOP_STMT_TOP_COND(NODE) TREE_OPERAND_CHECK_CODE (NODE, LOOP_STMT, 0)
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#define LOOP_STMT_BOT_COND(NODE) TREE_OPERAND_CHECK_CODE (NODE, LOOP_STMT, 1)
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#define LOOP_STMT_UPDATE(NODE) TREE_OPERAND_CHECK_CODE (NODE, LOOP_STMT, 2)
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#define LOOP_STMT_BODY(NODE) TREE_OPERAND_CHECK_CODE (NODE, LOOP_STMT, 3)
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#define LOOP_STMT_LABEL(NODE) TREE_OPERAND_CHECK_CODE (NODE, LOOP_STMT, 4)
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#define EXIT_STMT_COND(NODE) TREE_OPERAND_CHECK_CODE (NODE, EXIT_STMT, 0)
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#define EXIT_STMT_LABEL(NODE) TREE_OPERAND_CHECK_CODE (NODE, EXIT_STMT, 1)
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#define REGION_STMT_BODY(NODE) TREE_OPERAND_CHECK_CODE (NODE, REGION_STMT, 0)
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#define REGION_STMT_HANDLE(NODE) TREE_OPERAND_CHECK_CODE (NODE, REGION_STMT, 1)
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#define REGION_STMT_BLOCK(NODE) TREE_OPERAND_CHECK_CODE (NODE, REGION_STMT, 2)
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#define HANDLER_STMT_ARG(NODE) TREE_OPERAND_CHECK_CODE (NODE, HANDLER_STMT, 0)
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#define HANDLER_STMT_LIST(NODE) TREE_OPERAND_CHECK_CODE (NODE, HANDLER_STMT, 1)
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#define HANDLER_STMT_BLOCK(NODE) TREE_OPERAND_CHECK_CODE(NODE, HANDLER_STMT, 2)
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