1 /* Core data structures for the 'tree' type.
2 Copyright (C) 1989-2013 Free Software Foundation, Inc.
4 This file is part of GCC.
6 GCC is free software; you can redistribute it and/or modify it under
7 the terms of the GNU General Public License as published by the Free
8 Software Foundation; either version 3, or (at your option) any later
11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 You should have received a copy of the GNU General Public License
17 along with GCC; see the file COPYING3. If not see
18 <http://www.gnu.org/licenses/>. */
20 #ifndef GCC_TREE_CORE_H
21 #define GCC_TREE_CORE_H
26 #include "statistics.h"
28 #include "double-int.h"
30 #include "fixed-value.h"
35 /* This file contains all the data structures that define the 'tree' type.
36 There are no accessor macros nor functions in this file. Only the
37 basic data structures, extern declarations and type definitions. */
39 /*---------------------------------------------------------------------------
40 Forward type declarations. Mostly to avoid including unnecessary headers
41 ---------------------------------------------------------------------------*/
50 /*---------------------------------------------------------------------------
52 ---------------------------------------------------------------------------*/
53 /* Nonzero if this is a call to a function whose return value depends
54 solely on its arguments, has no side effects, and does not read
55 global memory. This corresponds to TREE_READONLY for function
57 #define ECF_CONST (1 << 0)
59 /* Nonzero if this is a call to "pure" function (like const function,
60 but may read memory. This corresponds to DECL_PURE_P for function
62 #define ECF_PURE (1 << 1)
64 /* Nonzero if this is ECF_CONST or ECF_PURE but cannot be proven to no
65 infinite loop. This corresponds to DECL_LOOPING_CONST_OR_PURE_P
67 #define ECF_LOOPING_CONST_OR_PURE (1 << 2)
69 /* Nonzero if this call will never return. */
70 #define ECF_NORETURN (1 << 3)
72 /* Nonzero if this is a call to malloc or a related function. */
73 #define ECF_MALLOC (1 << 4)
75 /* Nonzero if it is plausible that this is a call to alloca. */
76 #define ECF_MAY_BE_ALLOCA (1 << 5)
78 /* Nonzero if this is a call to a function that won't throw an exception. */
79 #define ECF_NOTHROW (1 << 6)
81 /* Nonzero if this is a call to setjmp or a related function. */
82 #define ECF_RETURNS_TWICE (1 << 7)
84 /* Nonzero if this call replaces the current stack frame. */
85 #define ECF_SIBCALL (1 << 8)
87 /* Function does not read or write memory (but may have side effects, so
88 it does not necessarily fit ECF_CONST). */
89 #define ECF_NOVOPS (1 << 9)
91 /* The function does not lead to calls within current function unit. */
92 #define ECF_LEAF (1 << 10)
94 /* Nonzero if this call does not affect transactions. */
95 #define ECF_TM_PURE (1 << 11)
97 /* Nonzero if this call is into the transaction runtime library. */
98 #define ECF_TM_BUILTIN (1 << 12)
100 /* Call argument flags. */
101 /* Nonzero if the argument is not dereferenced recursively, thus only
102 directly reachable memory is read or written. */
103 #define EAF_DIRECT (1 << 0)
105 /* Nonzero if memory reached by the argument is not clobbered. */
106 #define EAF_NOCLOBBER (1 << 1)
108 /* Nonzero if the argument does not escape. */
109 #define EAF_NOESCAPE (1 << 2)
111 /* Nonzero if the argument is not used by the function. */
112 #define EAF_UNUSED (1 << 3)
114 /* Call return flags. */
115 /* Mask for the argument number that is returned. Lower two bits of
116 the return flags, encodes argument slots zero to three. */
117 #define ERF_RETURN_ARG_MASK (3)
119 /* Nonzero if the return value is equal to the argument number
120 flags & ERF_RETURN_ARG_MASK. */
121 #define ERF_RETURNS_ARG (1 << 2)
123 /* Nonzero if the return value does not alias with anything. Functions
124 with the malloc attribute have this set on their return value. */
125 #define ERF_NOALIAS (1 << 3)
128 /*---------------------------------------------------------------------------
130 ---------------------------------------------------------------------------*/
131 /* Codes of tree nodes. */
132 #define DEFTREECODE(SYM, STRING, TYPE, NARGS) SYM,
133 #define END_OF_BASE_TREE_CODES LAST_AND_UNUSED_TREE_CODE,
136 #include "all-tree.def"
141 #undef END_OF_BASE_TREE_CODES
143 /* Number of language-independent tree codes. */
144 #define NUM_TREE_CODES \
145 ((int) LAST_AND_UNUSED_TREE_CODE)
147 #define CODE_CONTAINS_STRUCT(CODE, STRUCT) \
148 (tree_contains_struct[(CODE)][(STRUCT)])
151 /* Classify which part of the compiler has defined a given builtin function.
152 Note that we assume below that this is no more than two bits. */
153 enum built_in_class
{
160 /* Last marker used for LTO stremaing of built_in_class. We can not add it
161 to the enum since we need the enumb to fit in 2 bits. */
162 #define BUILT_IN_LAST (BUILT_IN_NORMAL + 1)
164 /* Codes that identify the various built in functions
165 so that expand_call can identify them quickly. */
166 #define DEF_BUILTIN(ENUM, N, C, T, LT, B, F, NA, AT, IM, COND) ENUM,
167 enum built_in_function
{
168 #include "builtins.def"
170 /* Complex division routines in libgcc. These are done via builtins
171 because emit_library_call_value can't handle complex values. */
172 BUILT_IN_COMPLEX_MUL_MIN
,
173 BUILT_IN_COMPLEX_MUL_MAX
174 = BUILT_IN_COMPLEX_MUL_MIN
175 + MAX_MODE_COMPLEX_FLOAT
176 - MIN_MODE_COMPLEX_FLOAT
,
178 BUILT_IN_COMPLEX_DIV_MIN
,
179 BUILT_IN_COMPLEX_DIV_MAX
180 = BUILT_IN_COMPLEX_DIV_MIN
181 + MAX_MODE_COMPLEX_FLOAT
182 - MIN_MODE_COMPLEX_FLOAT
,
184 /* Upper bound on non-language-specific builtins. */
189 /* Tree code classes. Each tree_code has an associated code class
190 represented by a TREE_CODE_CLASS. */
191 enum tree_code_class
{
192 tcc_exceptional
, /* An exceptional code (fits no category). */
193 tcc_constant
, /* A constant. */
194 /* Order of tcc_type and tcc_declaration is important. */
195 tcc_type
, /* A type object code. */
196 tcc_declaration
, /* A declaration (also serving as variable refs). */
197 tcc_reference
, /* A reference to storage. */
198 tcc_comparison
, /* A comparison expression. */
199 tcc_unary
, /* A unary arithmetic expression. */
200 tcc_binary
, /* A binary arithmetic expression. */
201 tcc_statement
, /* A statement expression, which have side effects
202 but usually no interesting value. */
203 tcc_vl_exp
, /* A function call or other expression with a
204 variable-length operand vector. */
205 tcc_expression
/* Any other expression. */
208 /* OMP_CLAUSE codes. Do not reorder, as this is used to index into
209 the tables omp_clause_num_ops and omp_clause_code_name. */
210 enum omp_clause_code
{
211 /* Clause zero is special-cased inside the parser
212 (c_parser_omp_variable_list). */
213 OMP_CLAUSE_ERROR
= 0,
215 /* OpenMP clause: private (variable_list). */
218 /* OpenMP clause: shared (variable_list). */
221 /* OpenMP clause: firstprivate (variable_list). */
222 OMP_CLAUSE_FIRSTPRIVATE
,
224 /* OpenMP clause: lastprivate (variable_list). */
225 OMP_CLAUSE_LASTPRIVATE
,
227 /* OpenMP clause: reduction (operator:variable_list).
228 OMP_CLAUSE_REDUCTION_CODE: The tree_code of the operator.
229 Operand 1: OMP_CLAUSE_REDUCTION_INIT: Stmt-list to initialize the var.
230 Operand 2: OMP_CLAUSE_REDUCTION_MERGE: Stmt-list to merge private var
232 Operand 3: OMP_CLAUSE_REDUCTION_PLACEHOLDER: A dummy VAR_DECL
233 placeholder used in OMP_CLAUSE_REDUCTION_{INIT,MERGE}. */
234 OMP_CLAUSE_REDUCTION
,
236 /* OpenMP clause: copyin (variable_list). */
239 /* OpenMP clause: copyprivate (variable_list). */
240 OMP_CLAUSE_COPYPRIVATE
,
242 /* OpenMP clause: linear (variable-list[:linear-step]). */
245 /* OpenMP clause: uniform (argument-list). */
248 /* OpenMP clause: if (scalar-expression). */
251 /* OpenMP clause: num_threads (integer-expression). */
252 OMP_CLAUSE_NUM_THREADS
,
254 /* OpenMP clause: schedule. */
257 /* OpenMP clause: nowait. */
260 /* OpenMP clause: ordered. */
263 /* OpenMP clause: default. */
266 /* OpenMP clause: collapse (constant-integer-expression). */
269 /* OpenMP clause: untied. */
272 /* OpenMP clause: final (scalar-expression). */
275 /* OpenMP clause: mergeable. */
276 OMP_CLAUSE_MERGEABLE
,
278 /* OpenMP clause: safelen (constant-integer-expression). */
281 /* Internally used only clause, holding SIMD uid. */
286 #define DEFTREESTRUCT(ENUM, NAME) ENUM,
287 enum tree_node_structure_enum
{
288 #include "treestruct.def"
293 enum omp_clause_schedule_kind
{
294 OMP_CLAUSE_SCHEDULE_STATIC
,
295 OMP_CLAUSE_SCHEDULE_DYNAMIC
,
296 OMP_CLAUSE_SCHEDULE_GUIDED
,
297 OMP_CLAUSE_SCHEDULE_AUTO
,
298 OMP_CLAUSE_SCHEDULE_RUNTIME
301 enum omp_clause_default_kind
{
302 OMP_CLAUSE_DEFAULT_UNSPECIFIED
,
303 OMP_CLAUSE_DEFAULT_SHARED
,
304 OMP_CLAUSE_DEFAULT_NONE
,
305 OMP_CLAUSE_DEFAULT_PRIVATE
,
306 OMP_CLAUSE_DEFAULT_FIRSTPRIVATE
309 /* There is a TYPE_QUAL value for each type qualifier. They can be
310 combined by bitwise-or to form the complete set of qualifiers for a
313 TYPE_UNQUALIFIED
= 0x0,
314 TYPE_QUAL_CONST
= 0x1,
315 TYPE_QUAL_VOLATILE
= 0x2,
316 TYPE_QUAL_RESTRICT
= 0x4
319 /* Enumerate visibility settings. */
320 #ifndef SYMBOL_VISIBILITY_DEFINED
321 #define SYMBOL_VISIBILITY_DEFINED
322 enum symbol_visibility
{
324 VISIBILITY_PROTECTED
,
328 #endif // SYMBOL_VISIBILITY_DEFINED
330 /* Standard named or nameless data types of the C compiler. */
352 TI_INTEGER_MINUS_ONE
,
369 TI_COMPLEX_INTEGER_TYPE
,
370 TI_COMPLEX_FLOAT_TYPE
,
371 TI_COMPLEX_DOUBLE_TYPE
,
372 TI_COMPLEX_LONG_DOUBLE_TYPE
,
380 TI_LONG_DOUBLE_PTR_TYPE
,
390 TI_VA_LIST_GPR_COUNTER_FIELD
,
391 TI_VA_LIST_FPR_COUNTER_FIELD
,
394 TI_POINTER_SIZED_TYPE
,
399 TI_DFLOAT32_PTR_TYPE
,
400 TI_DFLOAT64_PTR_TYPE
,
401 TI_DFLOAT128_PTR_TYPE
,
414 TI_SAT_ULLFRACT_TYPE
,
430 TI_SAT_ULLACCUM_TYPE
,
476 TI_OPTIMIZATION_DEFAULT
,
477 TI_OPTIMIZATION_CURRENT
,
478 TI_TARGET_OPTION_DEFAULT
,
479 TI_TARGET_OPTION_CURRENT
,
480 TI_CURRENT_TARGET_PRAGMA
,
481 TI_CURRENT_OPTIMIZE_PRAGMA
,
486 /* An enumeration of the standard C integer types. These must be
487 ordered so that shorter types appear before longer ones, and so
488 that signed types appear before unsigned ones, for the correct
489 functioning of interpret_integer() in c-lex.c. */
490 enum integer_type_kind
{
501 itk_unsigned_long_long
,
507 /* A pointer-to-function member type looks like:
514 If __pfn is NULL, it is a NULL pointer-to-member-function.
516 (Because the vtable is always the first thing in the object, we
517 don't need its offset.) If the function is virtual, then PFN is
518 one plus twice the index into the vtable; otherwise, it is just a
519 pointer to the function.
521 Unfortunately, using the lowest bit of PFN doesn't work in
522 architectures that don't impose alignment requirements on function
523 addresses, or that use the lowest bit to tell one ISA from another,
524 for example. For such architectures, we use the lowest bit of
525 DELTA instead of the lowest bit of the PFN, and DELTA will be
527 enum ptrmemfunc_vbit_where_t
{
528 ptrmemfunc_vbit_in_pfn
,
529 ptrmemfunc_vbit_in_delta
532 /* Flags that may be passed in the third argument of decl_attributes, and
533 to handler functions for attributes. */
534 enum attribute_flags
{
535 /* The type passed in is the type of a DECL, and any attributes that
536 should be passed in again to be applied to the DECL rather than the
537 type should be returned. */
538 ATTR_FLAG_DECL_NEXT
= 1,
539 /* The type passed in is a function return type, and any attributes that
540 should be passed in again to be applied to the function type rather
541 than the return type should be returned. */
542 ATTR_FLAG_FUNCTION_NEXT
= 2,
543 /* The type passed in is an array element type, and any attributes that
544 should be passed in again to be applied to the array type rather
545 than the element type should be returned. */
546 ATTR_FLAG_ARRAY_NEXT
= 4,
547 /* The type passed in is a structure, union or enumeration type being
548 created, and should be modified in place. */
549 ATTR_FLAG_TYPE_IN_PLACE
= 8,
550 /* The attributes are being applied by default to a library function whose
551 name indicates known behavior, and should be silently ignored if they
552 are not in fact compatible with the function type. */
553 ATTR_FLAG_BUILT_IN
= 16,
554 /* A given attribute has been parsed as a C++-11 attribute. */
558 /* Types used to represent sizes. */
559 enum size_type_kind
{
560 stk_sizetype
, /* Normal representation of sizes in bytes. */
561 stk_ssizetype
, /* Signed representation of sizes in bytes. */
562 stk_bitsizetype
, /* Normal representation of sizes in bits. */
563 stk_sbitsizetype
, /* Signed representation of sizes in bits. */
567 enum operand_equal_flag
{
570 OEP_CONSTANT_ADDRESS_OF
= 4
573 /* Enum and arrays used for tree allocation stats.
574 Keep in sync with tree.c:tree_node_kind_names. */
575 enum tree_node_kind
{
596 /*---------------------------------------------------------------------------
598 ---------------------------------------------------------------------------*/
599 /* When processing aliases at the symbol table level, we need the
600 declaration of target. For this reason we need to queue aliases and
601 process them after all declarations has been produced. */
602 typedef struct GTY(()) alias_pair
{
607 /* An initialization priority. */
608 typedef unsigned short priority_type
;
610 /* The type of a callback function for walking over tree structure. */
611 typedef tree (*walk_tree_fn
) (tree
*, int *, void *);
613 /* The type of a callback function that represents a custom walk_tree. */
614 typedef tree (*walk_tree_lh
) (tree
*, int *, tree (*) (tree
*, int *, void *),
615 void *, struct pointer_set_t
*);
618 /*---------------------------------------------------------------------------
620 ---------------------------------------------------------------------------*/
621 /* A tree node can represent a data type, a variable, an expression
622 or a statement. Each node has a TREE_CODE which says what kind of
623 thing it represents. Some common codes are:
624 INTEGER_TYPE -- represents a type of integers.
625 ARRAY_TYPE -- represents a type of pointer.
626 VAR_DECL -- represents a declared variable.
627 INTEGER_CST -- represents a constant integer value.
628 PLUS_EXPR -- represents a sum (an expression).
630 As for the contents of a tree node: there are some fields
631 that all nodes share. Each TREE_CODE has various special-purpose
632 fields as well. The fields of a node are never accessed directly,
633 always through accessor macros. */
635 /* Every kind of tree node starts with this structure,
636 so all nodes have these fields.
638 See the accessor macros, defined below, for documentation of the
639 fields, and the table below which connects the fields and the
642 struct GTY(()) tree_base
{
643 ENUM_BITFIELD(tree_code
) code
: 16;
645 unsigned side_effects_flag
: 1;
646 unsigned constant_flag
: 1;
647 unsigned addressable_flag
: 1;
648 unsigned volatile_flag
: 1;
649 unsigned readonly_flag
: 1;
650 unsigned asm_written_flag
: 1;
651 unsigned nowarning_flag
: 1;
652 unsigned visited
: 1;
654 unsigned used_flag
: 1;
655 unsigned nothrow_flag
: 1;
656 unsigned static_flag
: 1;
657 unsigned public_flag
: 1;
658 unsigned private_flag
: 1;
659 unsigned protected_flag
: 1;
660 unsigned deprecated_flag
: 1;
661 unsigned default_def_flag
: 1;
664 /* The bits in the following structure should only be used with
665 accessor macros that constrain inputs with tree checking. */
667 unsigned lang_flag_0
: 1;
668 unsigned lang_flag_1
: 1;
669 unsigned lang_flag_2
: 1;
670 unsigned lang_flag_3
: 1;
671 unsigned lang_flag_4
: 1;
672 unsigned lang_flag_5
: 1;
673 unsigned lang_flag_6
: 1;
674 unsigned saturating_flag
: 1;
676 unsigned unsigned_flag
: 1;
677 unsigned packed_flag
: 1;
678 unsigned user_align
: 1;
679 unsigned nameless_flag
: 1;
684 /* This field is only used with TREE_TYPE nodes; the only reason it is
685 present in tree_base instead of tree_type is to save space. The size
686 of the field must be large enough to hold addr_space_t values. */
687 unsigned address_space
: 8;
689 /* The following fields are present in tree_base to save space. The
690 nodes using them do not require any of the flags above and so can
691 make better use of the 4-byte sized word. */
692 /* VEC length. This field is only used with TREE_VEC. */
694 /* SSA version number. This field is only used with SSA_NAME. */
695 unsigned int version
;
699 /* The following table lists the uses of each of the above flags and
700 for which types of nodes they are defined.
705 VAR_DECL, PARM_DECL, RESULT_DECL, FUNCTION_DECL, LABEL_DECL
708 CONSTRUCTOR, IDENTIFIER_NODE
711 CALL_EXPR_TAILCALL in
717 PREDICT_EXPR_OUTCOME in
723 VAR_DECL, FUNCTION_DECL
726 TREE_NO_TRAMPOLINE in
732 TREE_SYMBOL_REFERENCED in
736 TARGET_EXPR, WITH_CLEANUP_EXPR
738 TRY_CATCH_IS_CLEANUP in
744 TYPE_REF_CAN_ALIAS_ALL in
745 POINTER_TYPE, REFERENCE_TYPE
753 TRANSACTION_EXPR_OUTER in
759 INTEGER_CST, REAL_CST, COMPLEX_CST, VECTOR_CST
762 VAR_DECL, FUNCTION_DECL
768 CALL_EXPR_VA_ARG_PACK in
771 TYPE_CACHED_VALUES_P in
774 SAVE_EXPR_RESOLVED_P in
777 OMP_CLAUSE_LASTPRIVATE_FIRSTPRIVATE in
778 OMP_CLAUSE_LASTPRIVATE
780 OMP_CLAUSE_PRIVATE_DEBUG in
783 TRANSACTION_EXPR_RELAXED in
791 CALL_EXPR_RETURN_SLOT_OPT in
797 OMP_PARALLEL_COMBINED in
800 OMP_CLAUSE_PRIVATE_OUTER_REF in
803 TYPE_REF_IS_RVALUE in
815 CALL_FROM_THUNK_P and
816 CALL_ALLOCA_FOR_VAR_P in
831 TREE_THIS_VOLATILE in
854 TYPE_SIZES_GIMPLIFIED in
868 VAR_DECL, FUNCTION_DECL, TYPE_DECL
869 RECORD_TYPE, UNION_TYPE, QUAL_UNION_TYPE
872 SSA_NAME_OCCURS_IN_ABNORMAL_PHI in
892 INDIRECT_REF, MEM_REF, TARGET_MEM_REF, ARRAY_REF, ARRAY_RANGE_REF
894 SSA_NAME_IN_FREELIST in
903 IDENTIFIER_TRANSPARENT_ALIAS in
909 all trees (used liberally by many passes)
916 VAR_DECL_IS_VIRTUAL_OPERAND in
930 TYPE_VECTOR_OPAQUE in
933 SSA_NAME_IS_DEFAULT_DEF in
936 DECL_NONLOCAL_FRAME in
940 struct GTY(()) tree_typed
{
941 struct tree_base base
;
945 struct GTY(()) tree_common
{
946 struct tree_typed typed
;
950 struct GTY(()) tree_int_cst
{
951 struct tree_typed typed
;
956 struct GTY(()) tree_real_cst
{
957 struct tree_typed typed
;
958 struct real_value
* real_cst_ptr
;
961 struct GTY(()) tree_fixed_cst
{
962 struct tree_typed typed
;
963 struct fixed_value
* fixed_cst_ptr
;
966 struct GTY(()) tree_string
{
967 struct tree_typed typed
;
972 struct GTY(()) tree_complex
{
973 struct tree_typed typed
;
978 struct GTY(()) tree_vector
{
979 struct tree_typed typed
;
980 tree
GTY ((length ("TYPE_VECTOR_SUBPARTS (TREE_TYPE ((tree)&%h))"))) elts
[1];
983 struct GTY(()) tree_identifier
{
984 struct tree_common common
;
985 struct ht_identifier id
;
988 struct GTY(()) tree_list
{
989 struct tree_common common
;
994 struct GTY(()) tree_vec
{
995 struct tree_common common
;
996 tree
GTY ((length ("TREE_VEC_LENGTH ((tree)&%h)"))) a
[1];
999 /* A single element of a CONSTRUCTOR. VALUE holds the actual value of the
1000 element. INDEX can optionally design the position of VALUE: in arrays,
1001 it is the index where VALUE has to be placed; in structures, it is the
1002 FIELD_DECL of the member. */
1003 typedef struct GTY(()) constructor_elt_d
{
1008 struct GTY(()) tree_constructor
{
1009 struct tree_typed typed
;
1010 vec
<constructor_elt
, va_gc
> *elts
;
1013 struct GTY(()) tree_exp
{
1014 struct tree_typed typed
;
1016 tree
GTY ((special ("tree_exp"),
1017 desc ("TREE_CODE ((tree) &%0)")))
1021 /* Immediate use linking structure. This structure is used for maintaining
1022 a doubly linked list of uses of an SSA_NAME. */
1023 typedef struct GTY(()) ssa_use_operand_d
{
1024 struct ssa_use_operand_d
* GTY((skip(""))) prev
;
1025 struct ssa_use_operand_d
* GTY((skip(""))) next
;
1026 /* Immediate uses for a given SSA name are maintained as a cyclic
1027 list. To recognize the root of this list, the location field
1028 needs to point to the original SSA name. Since statements and
1029 SSA names are of different data types, we need this union. See
1030 the explanation in struct immediate_use_iterator_d. */
1031 union { gimple stmt
; tree ssa_name
; } GTY((skip(""))) loc
;
1032 tree
*GTY((skip(""))) use
;
1033 } ssa_use_operand_t
;
1035 struct GTY(()) tree_ssa_name
{
1036 struct tree_typed typed
;
1038 /* _DECL wrapped by this SSA name. */
1041 /* Statement that defines this SSA name. */
1044 /* Pointer attributes used for alias analysis. */
1045 struct ptr_info_def
*ptr_info
;
1047 /* Immediate uses list for this SSA_NAME. */
1048 struct ssa_use_operand_d imm_uses
;
1051 struct GTY(()) phi_arg_d
{
1052 /* imm_use MUST be the first element in struct because we do some
1053 pointer arithmetic with it. See phi_arg_index_from_use. */
1054 struct ssa_use_operand_d imm_use
;
1059 struct GTY(()) tree_omp_clause
{
1060 struct tree_common common
;
1062 enum omp_clause_code code
;
1063 union omp_clause_subcode
{
1064 enum omp_clause_default_kind default_kind
;
1065 enum omp_clause_schedule_kind schedule_kind
;
1066 enum tree_code reduction_code
;
1067 } GTY ((skip
)) subcode
;
1069 /* The gimplification of OMP_CLAUSE_REDUCTION_{INIT,MERGE} for omp-low's
1071 gimple_seq gimple_reduction_init
;
1072 gimple_seq gimple_reduction_merge
;
1074 tree
GTY ((length ("omp_clause_num_ops[OMP_CLAUSE_CODE ((tree)&%h)]")))
1078 struct GTY(()) tree_block
{
1079 struct tree_base base
;
1082 unsigned abstract_flag
: 1;
1083 unsigned block_num
: 31;
1088 vec
<tree
, va_gc
> *nonlocalized_vars
;
1092 tree abstract_origin
;
1093 tree fragment_origin
;
1094 tree fragment_chain
;
1097 struct GTY(()) tree_type_common
{
1098 struct tree_common common
;
1104 unsigned int precision
: 10;
1105 unsigned no_force_blk_flag
: 1;
1106 unsigned needs_constructing_flag
: 1;
1107 unsigned transparent_aggr_flag
: 1;
1108 unsigned restrict_flag
: 1;
1109 unsigned contains_placeholder_bits
: 2;
1111 ENUM_BITFIELD(machine_mode
) mode
: 8;
1113 unsigned string_flag
: 1;
1114 unsigned lang_flag_0
: 1;
1115 unsigned lang_flag_1
: 1;
1116 unsigned lang_flag_2
: 1;
1117 unsigned lang_flag_3
: 1;
1118 unsigned lang_flag_4
: 1;
1119 unsigned lang_flag_5
: 1;
1120 unsigned lang_flag_6
: 1;
1123 alias_set_type alias_set
;
1126 union tree_type_symtab
{
1127 int GTY ((tag ("TYPE_SYMTAB_IS_ADDRESS"))) address
;
1128 const char * GTY ((tag ("TYPE_SYMTAB_IS_POINTER"))) pointer
;
1129 struct die_struct
* GTY ((tag ("TYPE_SYMTAB_IS_DIE"))) die
;
1130 } GTY ((desc ("debug_hooks->tree_type_symtab_field"))) symtab
;
1138 struct GTY(()) tree_type_with_lang_specific
{
1139 struct tree_type_common common
;
1140 /* Points to a structure whose details depend on the language in use. */
1141 struct lang_type
*lang_specific
;
1144 struct GTY(()) tree_type_non_common
{
1145 struct tree_type_with_lang_specific with_lang_specific
;
1152 struct GTY (()) tree_binfo
{
1153 struct tree_common common
;
1159 vec
<tree
, va_gc
> *base_accesses
;
1165 vec
<tree
, va_gc
> base_binfos
;
1168 struct GTY(()) tree_decl_minimal
{
1169 struct tree_common common
;
1176 struct GTY(()) tree_decl_common
{
1177 struct tree_decl_minimal common
;
1180 ENUM_BITFIELD(machine_mode
) mode
: 8;
1182 unsigned nonlocal_flag
: 1;
1183 unsigned virtual_flag
: 1;
1184 unsigned ignored_flag
: 1;
1185 unsigned abstract_flag
: 1;
1186 unsigned artificial_flag
: 1;
1187 unsigned preserve_flag
: 1;
1188 unsigned debug_expr_is_from
: 1;
1190 unsigned lang_flag_0
: 1;
1191 unsigned lang_flag_1
: 1;
1192 unsigned lang_flag_2
: 1;
1193 unsigned lang_flag_3
: 1;
1194 unsigned lang_flag_4
: 1;
1195 unsigned lang_flag_5
: 1;
1196 unsigned lang_flag_6
: 1;
1197 unsigned lang_flag_7
: 1;
1198 unsigned lang_flag_8
: 1;
1200 /* In LABEL_DECL, this is DECL_ERROR_ISSUED.
1201 In VAR_DECL and PARM_DECL, this is DECL_REGISTER. */
1202 unsigned decl_flag_0
: 1;
1203 /* In FIELD_DECL, this is DECL_BIT_FIELD
1204 In VAR_DECL and FUNCTION_DECL, this is DECL_EXTERNAL.
1205 In TYPE_DECL, this is TYPE_DECL_SUPPRESS_DEBUG. */
1206 unsigned decl_flag_1
: 1;
1207 /* In FIELD_DECL, this is DECL_NONADDRESSABLE_P
1208 In VAR_DECL, PARM_DECL and RESULT_DECL, this is
1209 DECL_HAS_VALUE_EXPR_P. */
1210 unsigned decl_flag_2
: 1;
1212 unsigned decl_flag_3
: 1;
1213 /* Logically, these two would go in a theoretical base shared by var and
1215 unsigned gimple_reg_flag
: 1;
1216 /* In VAR_DECL, PARM_DECL and RESULT_DECL, this is DECL_BY_REFERENCE. */
1217 unsigned decl_by_reference_flag
: 1;
1218 /* In a VAR_DECL and PARM_DECL, this is DECL_READ_P. */
1219 unsigned decl_read_flag
: 1;
1220 /* In a VAR_DECL or RESULT_DECL, this is DECL_NONSHAREABLE. */
1221 unsigned decl_nonshareable_flag
: 1;
1223 /* DECL_OFFSET_ALIGN, used only for FIELD_DECLs. */
1224 unsigned int off_align
: 8;
1226 /* 24 bits unused. */
1228 /* DECL_ALIGN. It should have the same size as TYPE_ALIGN. */
1231 /* UID for points-to sets, stable over copying from inlining. */
1232 unsigned int pt_uid
;
1237 tree abstract_origin
;
1239 /* Points to a structure whose details depend on the language in use. */
1240 struct lang_decl
*lang_specific
;
1243 struct GTY(()) tree_decl_with_rtl
{
1244 struct tree_decl_common common
;
1248 struct GTY(()) tree_field_decl
{
1249 struct tree_decl_common common
;
1252 tree bit_field_type
;
1258 struct GTY(()) tree_label_decl
{
1259 struct tree_decl_with_rtl common
;
1261 int eh_landing_pad_nr
;
1264 struct GTY(()) tree_result_decl
{
1265 struct tree_decl_with_rtl common
;
1268 struct GTY(()) tree_const_decl
{
1269 struct tree_decl_common common
;
1272 struct GTY(()) tree_parm_decl
{
1273 struct tree_decl_with_rtl common
;
1277 struct GTY(()) tree_decl_with_vis
{
1278 struct tree_decl_with_rtl common
;
1279 tree assembler_name
;
1283 /* Belong to VAR_DECL exclusively. */
1284 unsigned defer_output
: 1;
1285 unsigned hard_register
: 1;
1286 unsigned common_flag
: 1;
1287 unsigned in_text_section
: 1;
1288 unsigned in_constant_pool
: 1;
1289 unsigned dllimport_flag
: 1;
1290 /* Don't belong to VAR_DECL exclusively. */
1291 unsigned weak_flag
: 1;
1292 /* When SECTION_NAME is implied by -ffunction-section. */
1293 unsigned implicit_section_name_p
: 1;
1295 unsigned seen_in_bind_expr
: 1;
1296 unsigned comdat_flag
: 1;
1297 ENUM_BITFIELD(symbol_visibility
) visibility
: 2;
1298 unsigned visibility_specified
: 1;
1299 /* Belongs to VAR_DECL exclusively. */
1300 ENUM_BITFIELD(tls_model
) tls_model
: 3;
1302 /* Belong to FUNCTION_DECL exclusively. */
1303 unsigned init_priority_p
: 1;
1304 /* Used by C++ only. Might become a generic decl flag. */
1305 unsigned shadowed_for_var_p
: 1;
1306 /* Belong to FUNCTION_DECL exclusively. */
1307 unsigned cxx_constructor
: 1;
1308 /* Belong to FUNCTION_DECL exclusively. */
1309 unsigned cxx_destructor
: 1;
1310 /* Belong to FUNCTION_DECL exclusively. */
1312 /* 11 unused bits. */
1315 struct GTY(()) tree_var_decl
{
1316 struct tree_decl_with_vis common
;
1319 struct GTY(()) tree_decl_non_common
{
1320 struct tree_decl_with_vis common
;
1321 /* C++ uses this in namespaces. */
1323 /* C++ uses this in templates. */
1325 /* Almost all FE's use this. */
1327 /* C++ uses this in namespaces and function_decls. */
1331 struct GTY(()) tree_function_decl
{
1332 struct tree_decl_non_common common
;
1336 /* The personality function. Used for stack unwinding. */
1339 /* Function specific options that are used by this function. */
1340 tree function_specific_target
; /* target options */
1341 tree function_specific_optimization
; /* optimization options */
1343 /* In a FUNCTION_DECL for which DECL_BUILT_IN holds, this is
1344 DECL_FUNCTION_CODE. Otherwise unused.
1345 ??? The bitfield needs to be able to hold all target function
1347 ENUM_BITFIELD(built_in_function
) function_code
: 11;
1348 ENUM_BITFIELD(built_in_class
) built_in_class
: 2;
1350 unsigned static_ctor_flag
: 1;
1351 unsigned static_dtor_flag
: 1;
1352 unsigned uninlinable
: 1;
1354 unsigned possibly_inlined
: 1;
1355 unsigned novops_flag
: 1;
1356 unsigned returns_twice_flag
: 1;
1357 unsigned malloc_flag
: 1;
1358 unsigned operator_new_flag
: 1;
1359 unsigned declared_inline_flag
: 1;
1360 unsigned regdecl_flag
: 1;
1361 unsigned no_inline_warning_flag
: 1;
1363 unsigned no_instrument_function_entry_exit
: 1;
1364 unsigned no_limit_stack
: 1;
1365 unsigned disregard_inline_limits
: 1;
1366 unsigned pure_flag
: 1;
1367 unsigned looping_const_or_pure_flag
: 1;
1368 unsigned has_debug_args_flag
: 1;
1369 unsigned tm_clone_flag
: 1;
1370 unsigned versioned_function
: 1;
1374 struct GTY(()) tree_translation_unit_decl
{
1375 struct tree_decl_common common
;
1376 /* Source language of this translation unit. Used for DWARF output. */
1377 const char * GTY((skip(""))) language
;
1378 /* TODO: Non-optimization used to build this translation unit. */
1379 /* TODO: Root of a partial DWARF tree for global types and decls. */
1382 struct GTY(()) tree_type_decl
{
1383 struct tree_decl_non_common common
;
1387 struct GTY ((chain_next ("%h.next"), chain_prev ("%h.prev"))) tree_statement_list_node
1389 struct tree_statement_list_node
*prev
;
1390 struct tree_statement_list_node
*next
;
1394 struct GTY(()) tree_statement_list
1396 struct tree_typed typed
;
1397 struct tree_statement_list_node
*head
;
1398 struct tree_statement_list_node
*tail
;
1401 struct GTY(()) tree_optimization_option
{
1402 struct tree_common common
;
1404 /* The optimization options used by the user. */
1405 struct cl_optimization opts
;
1407 /* Target optabs for this set of optimization options. This is of
1408 type `struct target_optabs *'. */
1409 unsigned char *GTY ((atomic
)) optabs
;
1411 /* The value of this_target_optabs against which the optabs above were
1413 struct target_optabs
*GTY ((skip
)) base_optabs
;
1416 struct GTY(()) tree_target_option
{
1417 struct tree_common common
;
1419 /* The optimization options used by the user. */
1420 struct cl_target_option opts
;
1423 /* Define the overall contents of a tree node.
1424 It may be any of the structures declared above
1425 for various types of node. */
1426 union GTY ((ptr_alias (union lang_tree_node
),
1427 desc ("tree_node_structure (&%h)"), variable_size
)) tree_node
{
1428 struct tree_base
GTY ((tag ("TS_BASE"))) base
;
1429 struct tree_typed
GTY ((tag ("TS_TYPED"))) typed
;
1430 struct tree_common
GTY ((tag ("TS_COMMON"))) common
;
1431 struct tree_int_cst
GTY ((tag ("TS_INT_CST"))) int_cst
;
1432 struct tree_real_cst
GTY ((tag ("TS_REAL_CST"))) real_cst
;
1433 struct tree_fixed_cst
GTY ((tag ("TS_FIXED_CST"))) fixed_cst
;
1434 struct tree_vector
GTY ((tag ("TS_VECTOR"))) vector
;
1435 struct tree_string
GTY ((tag ("TS_STRING"))) string
;
1436 struct tree_complex
GTY ((tag ("TS_COMPLEX"))) complex;
1437 struct tree_identifier
GTY ((tag ("TS_IDENTIFIER"))) identifier
;
1438 struct tree_decl_minimal
GTY((tag ("TS_DECL_MINIMAL"))) decl_minimal
;
1439 struct tree_decl_common
GTY ((tag ("TS_DECL_COMMON"))) decl_common
;
1440 struct tree_decl_with_rtl
GTY ((tag ("TS_DECL_WRTL"))) decl_with_rtl
;
1441 struct tree_decl_non_common
GTY ((tag ("TS_DECL_NON_COMMON")))
1443 struct tree_parm_decl
GTY ((tag ("TS_PARM_DECL"))) parm_decl
;
1444 struct tree_decl_with_vis
GTY ((tag ("TS_DECL_WITH_VIS"))) decl_with_vis
;
1445 struct tree_var_decl
GTY ((tag ("TS_VAR_DECL"))) var_decl
;
1446 struct tree_field_decl
GTY ((tag ("TS_FIELD_DECL"))) field_decl
;
1447 struct tree_label_decl
GTY ((tag ("TS_LABEL_DECL"))) label_decl
;
1448 struct tree_result_decl
GTY ((tag ("TS_RESULT_DECL"))) result_decl
;
1449 struct tree_const_decl
GTY ((tag ("TS_CONST_DECL"))) const_decl
;
1450 struct tree_type_decl
GTY ((tag ("TS_TYPE_DECL"))) type_decl
;
1451 struct tree_function_decl
GTY ((tag ("TS_FUNCTION_DECL"))) function_decl
;
1452 struct tree_translation_unit_decl
GTY ((tag ("TS_TRANSLATION_UNIT_DECL")))
1453 translation_unit_decl
;
1454 struct tree_type_common
GTY ((tag ("TS_TYPE_COMMON"))) type_common
;
1455 struct tree_type_with_lang_specific
GTY ((tag ("TS_TYPE_WITH_LANG_SPECIFIC")))
1456 type_with_lang_specific
;
1457 struct tree_type_non_common
GTY ((tag ("TS_TYPE_NON_COMMON")))
1459 struct tree_list
GTY ((tag ("TS_LIST"))) list
;
1460 struct tree_vec
GTY ((tag ("TS_VEC"))) vec
;
1461 struct tree_exp
GTY ((tag ("TS_EXP"))) exp
;
1462 struct tree_ssa_name
GTY ((tag ("TS_SSA_NAME"))) ssa_name
;
1463 struct tree_block
GTY ((tag ("TS_BLOCK"))) block
;
1464 struct tree_binfo
GTY ((tag ("TS_BINFO"))) binfo
;
1465 struct tree_statement_list
GTY ((tag ("TS_STATEMENT_LIST"))) stmt_list
;
1466 struct tree_constructor
GTY ((tag ("TS_CONSTRUCTOR"))) constructor
;
1467 struct tree_omp_clause
GTY ((tag ("TS_OMP_CLAUSE"))) omp_clause
;
1468 struct tree_optimization_option
GTY ((tag ("TS_OPTIMIZATION"))) optimization
;
1469 struct tree_target_option
GTY ((tag ("TS_TARGET_OPTION"))) target_option
;
1472 /* Structure describing an attribute and a function to handle it. */
1473 struct attribute_spec
{
1474 /* The name of the attribute (without any leading or trailing __),
1475 or NULL to mark the end of a table of attributes. */
1477 /* The minimum length of the list of arguments of the attribute. */
1479 /* The maximum length of the list of arguments of the attribute
1480 (-1 for no maximum). */
1482 /* Whether this attribute requires a DECL. If it does, it will be passed
1483 from types of DECLs, function return types and array element types to
1484 the DECLs, function types and array types respectively; but when
1485 applied to a type in any other circumstances, it will be ignored with
1486 a warning. (If greater control is desired for a given attribute,
1487 this should be false, and the flags argument to the handler may be
1488 used to gain greater control in that case.) */
1490 /* Whether this attribute requires a type. If it does, it will be passed
1491 from a DECL to the type of that DECL. */
1493 /* Whether this attribute requires a function (or method) type. If it does,
1494 it will be passed from a function pointer type to the target type,
1495 and from a function return type (which is not itself a function
1496 pointer type) to the function type. */
1497 bool function_type_required
;
1498 /* Function to handle this attribute. NODE points to the node to which
1499 the attribute is to be applied. If a DECL, it should be modified in
1500 place; if a TYPE, a copy should be created. NAME is the name of the
1501 attribute (possibly with leading or trailing __). ARGS is the TREE_LIST
1502 of the arguments (which may be NULL). FLAGS gives further information
1503 about the context of the attribute. Afterwards, the attributes will
1504 be added to the DECL_ATTRIBUTES or TYPE_ATTRIBUTES, as appropriate,
1505 unless *NO_ADD_ATTRS is set to true (which should be done on error,
1506 as well as in any other cases when the attributes should not be added
1507 to the DECL or TYPE). Depending on FLAGS, any attributes to be
1508 applied to another type or DECL later may be returned;
1509 otherwise the return value should be NULL_TREE. This pointer may be
1510 NULL if no special handling is required beyond the checks implied
1511 by the rest of this structure. */
1512 tree (*handler
) (tree
*node
, tree name
, tree args
,
1513 int flags
, bool *no_add_attrs
);
1514 /* Specifies if attribute affects type's identity. */
1515 bool affects_type_identity
;
1518 /* These functions allow a front-end to perform a manual layout of a
1519 RECORD_TYPE. (For instance, if the placement of subsequent fields
1520 depends on the placement of fields so far.) Begin by calling
1521 start_record_layout. Then, call place_field for each of the
1522 fields. Then, call finish_record_layout. See layout_type for the
1523 default way in which these functions are used. */
1524 typedef struct record_layout_info_s
{
1525 /* The RECORD_TYPE that we are laying out. */
1527 /* The offset into the record so far, in bytes, not including bits in
1530 /* The last known alignment of SIZE. */
1531 unsigned int offset_align
;
1532 /* The bit position within the last OFFSET_ALIGN bits, in bits. */
1534 /* The alignment of the record so far, in bits. */
1535 unsigned int record_align
;
1536 /* The alignment of the record so far, ignoring #pragma pack and
1537 __attribute__ ((packed)), in bits. */
1538 unsigned int unpacked_align
;
1539 /* The previous field laid out. */
1541 /* The static variables (i.e., class variables, as opposed to
1542 instance variables) encountered in T. */
1543 vec
<tree
, va_gc
> *pending_statics
;
1544 /* Bits remaining in the current alignment group */
1545 int remaining_in_alignment
;
1546 /* True if we've seen a packed field that didn't have normal
1547 alignment anyway. */
1548 int packed_maybe_necessary
;
1549 } *record_layout_info
;
1551 /* Iterator for going through the function arguments. */
1552 struct function_args_iterator
{
1553 tree next
; /* TREE_LIST pointing to the next argument */
1556 /* Structures to map from a tree to another tree. */
1557 struct GTY(()) tree_map_base
{
1561 struct GTY(()) tree_map
{
1562 struct tree_map_base base
;
1567 /* Map from a decl tree to another tree. */
1568 struct GTY(()) tree_decl_map
{
1569 struct tree_map_base base
;
1573 /* Map from a tree to an int. */
1574 struct GTY(()) tree_int_map
{
1575 struct tree_map_base base
;
1579 /* Map from a tree to initialization/finalization priorities. */
1580 struct GTY(()) tree_priority_map
{
1581 struct tree_map_base base
;
1586 /* Map from a decl tree to a tree vector. */
1587 struct GTY(()) tree_vec_map
{
1588 struct tree_map_base base
;
1589 vec
<tree
, va_gc
> *to
;
1592 /* Abstract iterators for CALL_EXPRs. These static inline definitions
1593 have to go towards the end of tree.h so that union tree_node is fully
1594 defined by this point. */
1596 /* Structure containing iterator state. */
1597 struct call_expr_arg_iterator
{
1598 tree t
; /* the call_expr */
1599 int n
; /* argument count */
1600 int i
; /* next argument index */
1603 struct const_call_expr_arg_iterator
{
1604 const_tree t
; /* the call_expr */
1605 int n
; /* argument count */
1606 int i
; /* next argument index */
1609 /* The builtin_info structure holds the FUNCTION_DECL of the standard builtin
1610 function, and a flag that says if the function is available implicitly, or
1611 whether the user has to code explicit calls to __builtin_<xxx>. */
1612 struct GTY(()) builtin_info_type
{
1613 tree decl
[(int)END_BUILTINS
];
1614 bool implicit_p
[(int)END_BUILTINS
];
1618 /*---------------------------------------------------------------------------
1620 ---------------------------------------------------------------------------*/
1621 /* Matrix describing the structures contained in a given tree code. */
1622 extern unsigned char tree_contains_struct
[MAX_TREE_CODES
][64];
1624 /* Class of tree given its code. */
1625 extern const enum tree_code_class tree_code_type
[];
1627 /* Each tree code class has an associated string representation.
1628 These must correspond to the tree_code_class entries. */
1629 extern const char *const tree_code_class_strings
[];
1631 /* Number of argument-words in each kind of tree-node. */
1632 extern const unsigned char tree_code_length
[];
1634 /* Names of tree components. */
1635 extern const char *const tree_code_name
[];
1637 /* Vector of all alias pairs for global symbols. */
1638 extern GTY(()) vec
<alias_pair
, va_gc
> *alias_pairs
;
1640 /* Names of all the built_in classes. */
1641 extern const char *const built_in_class_names
[BUILT_IN_LAST
];
1643 /* Names of all the built_in functions. */
1644 extern const char * built_in_names
[(int) END_BUILTINS
];
1646 /* Number of operands and names for each OMP_CLAUSE node. */
1647 extern unsigned const char omp_clause_num_ops
[];
1648 extern const char * const omp_clause_code_name
[];
1650 /* A vector of all translation-units. */
1651 extern GTY (()) vec
<tree
, va_gc
> *all_translation_units
;
1653 /* Vector of standard trees used by the C compiler. */
1654 extern GTY(()) tree global_trees
[TI_MAX
];
1656 /* The standard C integer types. Use integer_type_kind to index into
1658 extern GTY(()) tree integer_types
[itk_none
];
1660 /* Types used to represent sizes. */
1661 extern GTY(()) tree sizetype_tab
[(int) stk_type_kind_last
];
1663 /* Arrays for keeping track of tree node statistics. */
1664 extern int tree_node_counts
[];
1665 extern int tree_node_sizes
[];
1667 /* True if we are in gimple form and the actions of the folders need to
1668 be restricted. False if we are not in gimple form and folding is not
1669 restricted to creating gimple expressions. */
1670 extern bool in_gimple_form
;
1672 /* Functional interface to the builtin functions. */
1673 extern GTY(()) builtin_info_type builtin_info
;
1675 /* If nonzero, an upper limit on alignment of structure fields, in bits, */
1676 extern unsigned int maximum_field_alignment
;
1678 /* Nonzero means lvalues are limited to those valid in pedantic ANSI C.
1679 Zero means allow extended lvalues. */
1680 extern int pedantic_lvalues
;
1682 /* Points to the FUNCTION_DECL of the function whose body we are reading. */
1683 extern GTY(()) tree current_function_decl
;
1685 /* Nonzero means a FUNC_BEGIN label was emitted. */
1686 extern GTY(()) const char * current_function_func_begin_label
;
1688 #endif // GCC_TREE_CORE_H