1 /* Core data structures for the 'tree' type.
2 Copyright (C) 1989-2016 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
25 /* This file contains all the data structures that define the 'tree' type.
26 There are no accessor macros nor functions in this file. Only the
27 basic data structures, extern declarations and type definitions. */
29 /*---------------------------------------------------------------------------
30 Forward type declarations. Mostly to avoid including unnecessary headers
31 ---------------------------------------------------------------------------*/
36 struct range_info_def
;
40 /*---------------------------------------------------------------------------
42 ---------------------------------------------------------------------------*/
43 /* Nonzero if this is a call to a function whose return value depends
44 solely on its arguments, has no side effects, and does not read
45 global memory. This corresponds to TREE_READONLY for function
47 #define ECF_CONST (1 << 0)
49 /* Nonzero if this is a call to "pure" function (like const function,
50 but may read memory. This corresponds to DECL_PURE_P for function
52 #define ECF_PURE (1 << 1)
54 /* Nonzero if this is ECF_CONST or ECF_PURE but cannot be proven to no
55 infinite loop. This corresponds to DECL_LOOPING_CONST_OR_PURE_P
57 #define ECF_LOOPING_CONST_OR_PURE (1 << 2)
59 /* Nonzero if this call will never return. */
60 #define ECF_NORETURN (1 << 3)
62 /* Nonzero if this is a call to malloc or a related function. */
63 #define ECF_MALLOC (1 << 4)
65 /* Nonzero if it is plausible that this is a call to alloca. */
66 #define ECF_MAY_BE_ALLOCA (1 << 5)
68 /* Nonzero if this is a call to a function that won't throw an exception. */
69 #define ECF_NOTHROW (1 << 6)
71 /* Nonzero if this is a call to setjmp or a related function. */
72 #define ECF_RETURNS_TWICE (1 << 7)
74 /* Nonzero if this call replaces the current stack frame. */
75 #define ECF_SIBCALL (1 << 8)
77 /* Function does not read or write memory (but may have side effects, so
78 it does not necessarily fit ECF_CONST). */
79 #define ECF_NOVOPS (1 << 9)
81 /* The function does not lead to calls within current function unit. */
82 #define ECF_LEAF (1 << 10)
84 /* Nonzero if this call does not affect transactions. */
85 #define ECF_TM_PURE (1 << 11)
87 /* Nonzero if this call is into the transaction runtime library. */
88 #define ECF_TM_BUILTIN (1 << 12)
90 /* Call argument flags. */
91 /* Nonzero if the argument is not dereferenced recursively, thus only
92 directly reachable memory is read or written. */
93 #define EAF_DIRECT (1 << 0)
95 /* Nonzero if memory reached by the argument is not clobbered. */
96 #define EAF_NOCLOBBER (1 << 1)
98 /* Nonzero if the argument does not escape. */
99 #define EAF_NOESCAPE (1 << 2)
101 /* Nonzero if the argument is not used by the function. */
102 #define EAF_UNUSED (1 << 3)
104 /* Call return flags. */
105 /* Mask for the argument number that is returned. Lower two bits of
106 the return flags, encodes argument slots zero to three. */
107 #define ERF_RETURN_ARG_MASK (3)
109 /* Nonzero if the return value is equal to the argument number
110 flags & ERF_RETURN_ARG_MASK. */
111 #define ERF_RETURNS_ARG (1 << 2)
113 /* Nonzero if the return value does not alias with anything. Functions
114 with the malloc attribute have this set on their return value. */
115 #define ERF_NOALIAS (1 << 3)
118 /*---------------------------------------------------------------------------
120 ---------------------------------------------------------------------------*/
121 /* Codes of tree nodes. */
122 #define DEFTREECODE(SYM, STRING, TYPE, NARGS) SYM,
123 #define END_OF_BASE_TREE_CODES LAST_AND_UNUSED_TREE_CODE,
126 #include "all-tree.def"
131 #undef END_OF_BASE_TREE_CODES
133 /* Number of language-independent tree codes. */
134 #define NUM_TREE_CODES \
135 ((int) LAST_AND_UNUSED_TREE_CODE)
137 #define CODE_CONTAINS_STRUCT(CODE, STRUCT) \
138 (tree_contains_struct[(CODE)][(STRUCT)])
141 /* Classify which part of the compiler has defined a given builtin function.
142 Note that we assume below that this is no more than two bits. */
143 enum built_in_class
{
150 /* Last marker used for LTO stremaing of built_in_class. We can not add it
151 to the enum since we need the enumb to fit in 2 bits. */
152 #define BUILT_IN_LAST (BUILT_IN_NORMAL + 1)
154 /* Codes that identify the various built in functions
155 so that expand_call can identify them quickly. */
156 #define DEF_BUILTIN(ENUM, N, C, T, LT, B, F, NA, AT, IM, COND) ENUM,
157 enum built_in_function
{
158 #include "builtins.def"
162 #define DEF_BUILTIN(ENUM, N, C, T, LT, B, F, NA, AT, IM, COND)
163 #define DEF_BUILTIN_CHKP(ENUM, N, C, T, LT, B, F, NA, AT, IM, COND) \
164 ENUM##_CHKP = ENUM + BEGIN_CHKP_BUILTINS + 1,
165 #include "builtins.def"
167 END_CHKP_BUILTINS
= BEGIN_CHKP_BUILTINS
* 2 + 1,
169 /* Complex division routines in libgcc. These are done via builtins
170 because emit_library_call_value can't handle complex values. */
171 BUILT_IN_COMPLEX_MUL_MIN
,
172 BUILT_IN_COMPLEX_MUL_MAX
173 = BUILT_IN_COMPLEX_MUL_MIN
174 + MAX_MODE_COMPLEX_FLOAT
175 - MIN_MODE_COMPLEX_FLOAT
,
177 BUILT_IN_COMPLEX_DIV_MIN
,
178 BUILT_IN_COMPLEX_DIV_MAX
179 = BUILT_IN_COMPLEX_DIV_MIN
180 + MAX_MODE_COMPLEX_FLOAT
181 - MIN_MODE_COMPLEX_FLOAT
,
183 /* Upper bound on non-language-specific builtins. */
187 /* Internal functions. */
189 #define DEF_INTERNAL_FN(CODE, FLAGS, FNSPEC) IFN_##CODE,
190 #include "internal-fn.def"
194 /* An enum that combines target-independent built-in functions with
195 internal functions, so that they can be treated in a similar way.
196 The numbers for built-in functions are the same as for the
197 built_in_function enum. The numbers for internal functions
198 start at END_BUITLINS. */
200 #define DEF_BUILTIN(ENUM, N, C, T, LT, B, F, NA, AT, IM, COND) \
201 CFN_##ENUM = int (ENUM),
202 #include "builtins.def"
204 #define DEF_BUILTIN(ENUM, N, C, T, LT, B, F, NA, AT, IM, COND)
205 #define DEF_BUILTIN_CHKP(ENUM, N, C, T, LT, B, F, NA, AT, IM, COND) \
206 CFN_##ENUM##_CHKP = int (ENUM##_CHKP),
207 #include "builtins.def"
209 #define DEF_INTERNAL_FN(CODE, FLAGS, FNSPEC) \
210 CFN_##CODE = int (END_BUILTINS) + int (IFN_##CODE),
211 #include "internal-fn.def"
216 /* Tree code classes. Each tree_code has an associated code class
217 represented by a TREE_CODE_CLASS. */
218 enum tree_code_class
{
219 tcc_exceptional
, /* An exceptional code (fits no category). */
220 tcc_constant
, /* A constant. */
221 /* Order of tcc_type and tcc_declaration is important. */
222 tcc_type
, /* A type object code. */
223 tcc_declaration
, /* A declaration (also serving as variable refs). */
224 tcc_reference
, /* A reference to storage. */
225 tcc_comparison
, /* A comparison expression. */
226 tcc_unary
, /* A unary arithmetic expression. */
227 tcc_binary
, /* A binary arithmetic expression. */
228 tcc_statement
, /* A statement expression, which have side effects
229 but usually no interesting value. */
230 tcc_vl_exp
, /* A function call or other expression with a
231 variable-length operand vector. */
232 tcc_expression
/* Any other expression. */
235 /* OMP_CLAUSE codes. Do not reorder, as this is used to index into
236 the tables omp_clause_num_ops and omp_clause_code_name. */
237 enum omp_clause_code
{
238 /* Clause zero is special-cased inside the parser
239 (c_parser_omp_variable_list). */
240 OMP_CLAUSE_ERROR
= 0,
242 /* OpenACC/OpenMP clause: private (variable_list). */
245 /* OpenMP clause: shared (variable_list). */
248 /* OpenACC/OpenMP clause: firstprivate (variable_list). */
249 OMP_CLAUSE_FIRSTPRIVATE
,
251 /* OpenMP clause: lastprivate (variable_list). */
252 OMP_CLAUSE_LASTPRIVATE
,
254 /* OpenACC/OpenMP clause: reduction (operator:variable_list).
255 OMP_CLAUSE_REDUCTION_CODE: The tree_code of the operator.
256 Operand 1: OMP_CLAUSE_REDUCTION_INIT: Stmt-list to initialize the var.
257 Operand 2: OMP_CLAUSE_REDUCTION_MERGE: Stmt-list to merge private var
259 Operand 3: OMP_CLAUSE_REDUCTION_PLACEHOLDER: A dummy VAR_DECL
260 placeholder used in OMP_CLAUSE_REDUCTION_{INIT,MERGE}.
261 Operand 4: OMP_CLAUSE_REDUCTION_DECL_PLACEHOLDER: Another dummy
262 VAR_DECL placeholder, used like the above for C/C++ array
264 OMP_CLAUSE_REDUCTION
,
266 /* OpenMP clause: copyin (variable_list). */
269 /* OpenMP clause: copyprivate (variable_list). */
270 OMP_CLAUSE_COPYPRIVATE
,
272 /* OpenMP clause: linear (variable-list[:linear-step]). */
275 /* OpenMP clause: aligned (variable-list[:alignment]). */
278 /* OpenMP clause: depend ({in,out,inout}:variable-list). */
281 /* OpenMP clause: uniform (argument-list). */
284 /* OpenMP clause: to (extended-list).
285 Only when it appears in declare target. */
286 OMP_CLAUSE_TO_DECLARE
,
288 /* OpenMP clause: link (variable-list). */
291 /* OpenMP clause: from (variable-list). */
294 /* OpenMP clause: to (variable-list). */
297 /* OpenACC clauses: {copy, copyin, copyout, create, delete, deviceptr,
298 device, host (self), present, present_or_copy (pcopy), present_or_copyin
299 (pcopyin), present_or_copyout (pcopyout), present_or_create (pcreate)}
302 OpenMP clause: map ({alloc:,to:,from:,tofrom:,}variable-list). */
305 /* OpenACC clause: use_device (variable_list).
306 OpenMP clause: use_device_ptr (variable-list). */
307 OMP_CLAUSE_USE_DEVICE_PTR
,
309 /* OpenMP clause: is_device_ptr (variable-list). */
310 OMP_CLAUSE_IS_DEVICE_PTR
,
312 /* Internal structure to hold OpenACC cache directive's variable-list.
313 #pragma acc cache (variable-list). */
316 /* OpenACC clause: device_resident (variable_list). */
317 OMP_CLAUSE_DEVICE_RESIDENT
,
319 /* OpenACC clause: gang [(gang-argument-list)].
321 gang-argument-list: [gang-argument-list, ] gang-argument
322 gang-argument: [num:] integer-expression
323 | static: size-expression
324 size-expression: * | integer-expression. */
327 /* OpenACC clause: async [(integer-expression)]. */
330 /* OpenACC clause: wait [(integer-expression-list)]. */
333 /* OpenACC clause: auto. */
336 /* OpenACC clause: seq. */
339 /* Internal clause: temporary for combined loops expansion. */
340 OMP_CLAUSE__LOOPTEMP_
,
342 /* OpenACC/OpenMP clause: if (scalar-expression). */
345 /* OpenMP clause: num_threads (integer-expression). */
346 OMP_CLAUSE_NUM_THREADS
,
348 /* OpenMP clause: schedule. */
351 /* OpenMP clause: nowait. */
354 /* OpenMP clause: ordered [(constant-integer-expression)]. */
357 /* OpenMP clause: default. */
360 /* OpenACC/OpenMP clause: collapse (constant-integer-expression). */
363 /* OpenMP clause: untied. */
366 /* OpenMP clause: final (scalar-expression). */
369 /* OpenMP clause: mergeable. */
370 OMP_CLAUSE_MERGEABLE
,
372 /* OpenMP clause: device (integer-expression). */
375 /* OpenMP clause: dist_schedule (static[:chunk-size]). */
376 OMP_CLAUSE_DIST_SCHEDULE
,
378 /* OpenMP clause: inbranch. */
381 /* OpenMP clause: notinbranch. */
382 OMP_CLAUSE_NOTINBRANCH
,
384 /* OpenMP clause: num_teams(integer-expression). */
385 OMP_CLAUSE_NUM_TEAMS
,
387 /* OpenMP clause: thread_limit(integer-expression). */
388 OMP_CLAUSE_THREAD_LIMIT
,
390 /* OpenMP clause: proc_bind ({master,close,spread}). */
391 OMP_CLAUSE_PROC_BIND
,
393 /* OpenMP clause: safelen (constant-integer-expression). */
396 /* OpenMP clause: simdlen (constant-integer-expression). */
399 /* OpenMP clause: for. */
402 /* OpenMP clause: parallel. */
405 /* OpenMP clause: sections. */
408 /* OpenMP clause: taskgroup. */
409 OMP_CLAUSE_TASKGROUP
,
411 /* OpenMP clause: priority (integer-expression). */
414 /* OpenMP clause: grainsize (integer-expression). */
415 OMP_CLAUSE_GRAINSIZE
,
417 /* OpenMP clause: num_tasks (integer-expression). */
418 OMP_CLAUSE_NUM_TASKS
,
420 /* OpenMP clause: nogroup. */
423 /* OpenMP clause: threads. */
426 /* OpenMP clause: simd. */
429 /* OpenMP clause: hint (integer-expression). */
432 /* OpenMP clause: defaultmap (tofrom: scalar). */
433 OMP_CLAUSE_DEFAULTMAP
,
435 /* Internally used only clause, holding SIMD uid. */
436 OMP_CLAUSE__SIMDUID_
,
438 /* Internally used only clause, holding _Cilk_for # of iterations
440 OMP_CLAUSE__CILK_FOR_COUNT_
,
442 /* OpenACC clause: independent. */
443 OMP_CLAUSE_INDEPENDENT
,
445 /* OpenACC clause: worker [( [num:] integer-expression)]. */
448 /* OpenACC clause: vector [( [length:] integer-expression)]. */
451 /* OpenACC clause: num_gangs (integer-expression). */
452 OMP_CLAUSE_NUM_GANGS
,
454 /* OpenACC clause: num_workers (integer-expression). */
455 OMP_CLAUSE_NUM_WORKERS
,
457 /* OpenACC clause: vector_length (integer-expression). */
458 OMP_CLAUSE_VECTOR_LENGTH
,
460 /* OpenACC clause: tile ( size-expr-list ). */
465 #define DEFTREESTRUCT(ENUM, NAME) ENUM,
466 enum tree_node_structure_enum
{
467 #include "treestruct.def"
472 enum omp_clause_schedule_kind
{
473 OMP_CLAUSE_SCHEDULE_STATIC
,
474 OMP_CLAUSE_SCHEDULE_DYNAMIC
,
475 OMP_CLAUSE_SCHEDULE_GUIDED
,
476 OMP_CLAUSE_SCHEDULE_AUTO
,
477 OMP_CLAUSE_SCHEDULE_RUNTIME
,
478 OMP_CLAUSE_SCHEDULE_CILKFOR
,
479 OMP_CLAUSE_SCHEDULE_MASK
= (1 << 3) - 1,
480 OMP_CLAUSE_SCHEDULE_MONOTONIC
= (1 << 3),
481 OMP_CLAUSE_SCHEDULE_NONMONOTONIC
= (1 << 4),
482 OMP_CLAUSE_SCHEDULE_LAST
= 2 * OMP_CLAUSE_SCHEDULE_NONMONOTONIC
- 1
485 enum omp_clause_default_kind
{
486 OMP_CLAUSE_DEFAULT_UNSPECIFIED
,
487 OMP_CLAUSE_DEFAULT_SHARED
,
488 OMP_CLAUSE_DEFAULT_NONE
,
489 OMP_CLAUSE_DEFAULT_PRIVATE
,
490 OMP_CLAUSE_DEFAULT_FIRSTPRIVATE
,
491 OMP_CLAUSE_DEFAULT_LAST
494 /* There is a TYPE_QUAL value for each type qualifier. They can be
495 combined by bitwise-or to form the complete set of qualifiers for a
498 TYPE_UNQUALIFIED
= 0x0,
499 TYPE_QUAL_CONST
= 0x1,
500 TYPE_QUAL_VOLATILE
= 0x2,
501 TYPE_QUAL_RESTRICT
= 0x4,
502 TYPE_QUAL_ATOMIC
= 0x8
505 /* Standard named or nameless data types of the C compiler. */
535 TI_INTEGER_MINUS_ONE
,
552 TI_COMPLEX_INTEGER_TYPE
,
553 TI_COMPLEX_FLOAT_TYPE
,
554 TI_COMPLEX_DOUBLE_TYPE
,
555 TI_COMPLEX_LONG_DOUBLE_TYPE
,
563 TI_LONG_DOUBLE_PTR_TYPE
,
573 TI_VA_LIST_GPR_COUNTER_FIELD
,
574 TI_VA_LIST_FPR_COUNTER_FIELD
,
577 TI_POINTER_SIZED_TYPE
,
579 TI_POINTER_BOUNDS_TYPE
,
584 TI_DFLOAT32_PTR_TYPE
,
585 TI_DFLOAT64_PTR_TYPE
,
586 TI_DFLOAT128_PTR_TYPE
,
599 TI_SAT_ULLFRACT_TYPE
,
615 TI_SAT_ULLACCUM_TYPE
,
661 TI_OPTIMIZATION_DEFAULT
,
662 TI_OPTIMIZATION_CURRENT
,
663 TI_TARGET_OPTION_DEFAULT
,
664 TI_TARGET_OPTION_CURRENT
,
665 TI_CURRENT_TARGET_PRAGMA
,
666 TI_CURRENT_OPTIMIZE_PRAGMA
,
671 /* An enumeration of the standard C integer types. These must be
672 ordered so that shorter types appear before longer ones, and so
673 that signed types appear before unsigned ones, for the correct
674 functioning of interpret_integer() in c-lex.c. */
675 enum integer_type_kind
{
686 itk_unsigned_long_long
,
700 /* A pointer-to-function member type looks like:
707 If __pfn is NULL, it is a NULL pointer-to-member-function.
709 (Because the vtable is always the first thing in the object, we
710 don't need its offset.) If the function is virtual, then PFN is
711 one plus twice the index into the vtable; otherwise, it is just a
712 pointer to the function.
714 Unfortunately, using the lowest bit of PFN doesn't work in
715 architectures that don't impose alignment requirements on function
716 addresses, or that use the lowest bit to tell one ISA from another,
717 for example. For such architectures, we use the lowest bit of
718 DELTA instead of the lowest bit of the PFN, and DELTA will be
720 enum ptrmemfunc_vbit_where_t
{
721 ptrmemfunc_vbit_in_pfn
,
722 ptrmemfunc_vbit_in_delta
725 /* Flags that may be passed in the third argument of decl_attributes, and
726 to handler functions for attributes. */
727 enum attribute_flags
{
728 /* The type passed in is the type of a DECL, and any attributes that
729 should be passed in again to be applied to the DECL rather than the
730 type should be returned. */
731 ATTR_FLAG_DECL_NEXT
= 1,
732 /* The type passed in is a function return type, and any attributes that
733 should be passed in again to be applied to the function type rather
734 than the return type should be returned. */
735 ATTR_FLAG_FUNCTION_NEXT
= 2,
736 /* The type passed in is an array element type, and any attributes that
737 should be passed in again to be applied to the array type rather
738 than the element type should be returned. */
739 ATTR_FLAG_ARRAY_NEXT
= 4,
740 /* The type passed in is a structure, union or enumeration type being
741 created, and should be modified in place. */
742 ATTR_FLAG_TYPE_IN_PLACE
= 8,
743 /* The attributes are being applied by default to a library function whose
744 name indicates known behavior, and should be silently ignored if they
745 are not in fact compatible with the function type. */
746 ATTR_FLAG_BUILT_IN
= 16,
747 /* A given attribute has been parsed as a C++-11 attribute. */
751 /* Types used to represent sizes. */
752 enum size_type_kind
{
753 stk_sizetype
, /* Normal representation of sizes in bytes. */
754 stk_ssizetype
, /* Signed representation of sizes in bytes. */
755 stk_bitsizetype
, /* Normal representation of sizes in bits. */
756 stk_sbitsizetype
, /* Signed representation of sizes in bits. */
760 enum operand_equal_flag
{
763 OEP_MATCH_SIDE_EFFECTS
= 4,
767 /* Enum and arrays used for tree allocation stats.
768 Keep in sync with tree.c:tree_node_kind_names. */
769 enum tree_node_kind
{
789 enum annot_expr_kind
{
790 annot_expr_ivdep_kind
,
791 annot_expr_no_vector_kind
,
792 annot_expr_vector_kind
,
796 /*---------------------------------------------------------------------------
798 ---------------------------------------------------------------------------*/
799 /* When processing aliases at the symbol table level, we need the
800 declaration of target. For this reason we need to queue aliases and
801 process them after all declarations has been produced. */
802 struct GTY(()) alias_pair
{
807 /* An initialization priority. */
808 typedef unsigned short priority_type
;
810 /* The type of a callback function for walking over tree structure. */
811 typedef tree (*walk_tree_fn
) (tree
*, int *, void *);
813 /* The type of a callback function that represents a custom walk_tree. */
814 typedef tree (*walk_tree_lh
) (tree
*, int *, tree (*) (tree
*, int *, void *),
815 void *, hash_set
<tree
> *);
818 /*---------------------------------------------------------------------------
820 ---------------------------------------------------------------------------*/
821 /* A tree node can represent a data type, a variable, an expression
822 or a statement. Each node has a TREE_CODE which says what kind of
823 thing it represents. Some common codes are:
824 INTEGER_TYPE -- represents a type of integers.
825 ARRAY_TYPE -- represents a type of pointer.
826 VAR_DECL -- represents a declared variable.
827 INTEGER_CST -- represents a constant integer value.
828 PLUS_EXPR -- represents a sum (an expression).
830 As for the contents of a tree node: there are some fields
831 that all nodes share. Each TREE_CODE has various special-purpose
832 fields as well. The fields of a node are never accessed directly,
833 always through accessor macros. */
835 /* Every kind of tree node starts with this structure,
836 so all nodes have these fields.
838 See the accessor macros, defined below, for documentation of the
839 fields, and the table below which connects the fields and the
842 struct GTY(()) tree_base
{
843 ENUM_BITFIELD(tree_code
) code
: 16;
845 unsigned side_effects_flag
: 1;
846 unsigned constant_flag
: 1;
847 unsigned addressable_flag
: 1;
848 unsigned volatile_flag
: 1;
849 unsigned readonly_flag
: 1;
850 unsigned asm_written_flag
: 1;
851 unsigned nowarning_flag
: 1;
852 unsigned visited
: 1;
854 unsigned used_flag
: 1;
855 unsigned nothrow_flag
: 1;
856 unsigned static_flag
: 1;
857 unsigned public_flag
: 1;
858 unsigned private_flag
: 1;
859 unsigned protected_flag
: 1;
860 unsigned deprecated_flag
: 1;
861 unsigned default_def_flag
: 1;
864 /* The bits in the following structure should only be used with
865 accessor macros that constrain inputs with tree checking. */
867 unsigned lang_flag_0
: 1;
868 unsigned lang_flag_1
: 1;
869 unsigned lang_flag_2
: 1;
870 unsigned lang_flag_3
: 1;
871 unsigned lang_flag_4
: 1;
872 unsigned lang_flag_5
: 1;
873 unsigned lang_flag_6
: 1;
874 unsigned saturating_flag
: 1;
876 unsigned unsigned_flag
: 1;
877 unsigned packed_flag
: 1;
878 unsigned user_align
: 1;
879 unsigned nameless_flag
: 1;
880 unsigned atomic_flag
: 1;
885 /* This field is only used with TREE_TYPE nodes; the only reason it is
886 present in tree_base instead of tree_type is to save space. The size
887 of the field must be large enough to hold addr_space_t values. */
888 unsigned address_space
: 8;
891 /* The following fields are present in tree_base to save space. The
892 nodes using them do not require any of the flags above and so can
893 make better use of the 4-byte sized word. */
895 /* The number of HOST_WIDE_INTs in an INTEGER_CST. */
897 /* The number of HOST_WIDE_INTs if the INTEGER_CST is accessed in
898 its native precision. */
899 unsigned char unextended
;
901 /* The number of HOST_WIDE_INTs if the INTEGER_CST is extended to
902 wider precisions based on its TYPE_SIGN. */
903 unsigned char extended
;
905 /* The number of HOST_WIDE_INTs if the INTEGER_CST is accessed in
906 offset_int precision, with smaller integers being extended
907 according to their TYPE_SIGN. This is equal to one of the two
908 fields above but is cached for speed. */
909 unsigned char offset
;
912 /* VEC length. This field is only used with TREE_VEC. */
915 /* SSA version number. This field is only used with SSA_NAME. */
916 unsigned int version
;
918 /* Internal function code. */
919 enum internal_fn ifn
;
921 /* The following two fields are used for MEM_REF and TARGET_MEM_REF
922 expression trees and specify known data non-dependences. For
923 two memory references in a function they are known to not
924 alias if dependence_info.clique are equal and dependence_info.base
927 unsigned short clique
;
933 /* The following table lists the uses of each of the above flags and
934 for which types of nodes they are defined.
939 VAR_DECL, PARM_DECL, RESULT_DECL, FUNCTION_DECL, LABEL_DECL
942 CONSTRUCTOR, IDENTIFIER_NODE
945 CALL_EXPR_TAILCALL in
951 PREDICT_EXPR_OUTCOME in
957 VAR_DECL, FUNCTION_DECL
960 TREE_NO_TRAMPOLINE in
966 TREE_SYMBOL_REFERENCED in
970 TARGET_EXPR, WITH_CLEANUP_EXPR
972 TRY_CATCH_IS_CLEANUP in
978 TYPE_REF_CAN_ALIAS_ALL in
979 POINTER_TYPE, REFERENCE_TYPE
987 TRANSACTION_EXPR_OUTER in
990 SSA_NAME_ANTI_RANGE_P in
996 INTEGER_CST, REAL_CST, COMPLEX_CST, VECTOR_CST
999 VAR_DECL, FUNCTION_DECL
1002 CONSTRUCTOR_NO_CLEARING in
1008 CALL_EXPR_VA_ARG_PACK in
1011 TYPE_CACHED_VALUES_P in
1014 SAVE_EXPR_RESOLVED_P in
1017 OMP_CLAUSE_LASTPRIVATE_FIRSTPRIVATE in
1018 OMP_CLAUSE_LASTPRIVATE
1020 OMP_CLAUSE_PRIVATE_DEBUG in
1023 OMP_CLAUSE_LINEAR_NO_COPYIN in
1026 OMP_CLAUSE_MAP_ZERO_BIAS_ARRAY_SECTION in
1029 OMP_CLAUSE_REDUCTION_OMP_ORIG_REF in
1030 OMP_CLAUSE_REDUCTION
1032 TRANSACTION_EXPR_RELAXED in
1040 CALL_EXPR_RETURN_SLOT_OPT in
1046 OMP_PARALLEL_COMBINED in
1049 OMP_ATOMIC_SEQ_CST in
1052 OMP_CLAUSE_PRIVATE_OUTER_REF in
1055 OMP_CLAUSE_LINEAR_NO_COPYOUT in
1058 TYPE_REF_IS_RVALUE in
1070 CALL_FROM_THUNK_P and
1071 CALL_ALLOCA_FOR_VAR_P in
1074 OMP_CLAUSE_LINEAR_VARIABLE_STRIDE in
1079 TREE_SIDE_EFFECTS in
1089 TREE_THIS_VOLATILE in
1112 TYPE_SIZES_GIMPLIFIED in
1126 VAR_DECL, FUNCTION_DECL, TYPE_DECL
1127 RECORD_TYPE, UNION_TYPE, QUAL_UNION_TYPE
1130 SSA_NAME_OCCURS_IN_ABNORMAL_PHI in
1150 INDIRECT_REF, MEM_REF, TARGET_MEM_REF, ARRAY_REF, ARRAY_RANGE_REF
1152 SSA_NAME_IN_FREE_LIST in
1164 IDENTIFIER_TRANSPARENT_ALIAS in
1170 all trees (used liberally by many passes)
1174 TYPE_REVERSE_STORAGE_ORDER in
1175 RECORD_TYPE, UNION_TYPE, QUAL_UNION_TYPE, ARRAY_TYPE
1180 VAR_DECL_IS_VIRTUAL_OPERAND in
1195 RECORD_TYPE, UNION_TYPE and QUAL_UNION_TYPE
1197 TYPE_VECTOR_OPAQUE in
1200 SSA_NAME_IS_DEFAULT_DEF in
1203 DECL_NONLOCAL_FRAME in
1206 REF_REVERSE_STORAGE_ORDER in
1207 BIT_FIELD_REF, MEM_REF
1210 struct GTY(()) tree_typed
{
1211 struct tree_base base
;
1215 struct GTY(()) tree_common
{
1216 struct tree_typed typed
;
1220 struct GTY(()) tree_int_cst
{
1221 struct tree_typed typed
;
1222 HOST_WIDE_INT val
[1];
1226 struct GTY(()) tree_real_cst
{
1227 struct tree_typed typed
;
1228 struct real_value
* real_cst_ptr
;
1231 struct GTY(()) tree_fixed_cst
{
1232 struct tree_typed typed
;
1233 struct fixed_value
* fixed_cst_ptr
;
1236 struct GTY(()) tree_string
{
1237 struct tree_typed typed
;
1242 struct GTY(()) tree_complex
{
1243 struct tree_typed typed
;
1248 struct GTY(()) tree_vector
{
1249 struct tree_typed typed
;
1250 tree
GTY ((length ("TYPE_VECTOR_SUBPARTS (TREE_TYPE ((tree)&%h))"))) elts
[1];
1253 struct GTY(()) tree_identifier
{
1254 struct tree_common common
;
1255 struct ht_identifier id
;
1258 struct GTY(()) tree_list
{
1259 struct tree_common common
;
1264 struct GTY(()) tree_vec
{
1265 struct tree_common common
;
1266 tree
GTY ((length ("TREE_VEC_LENGTH ((tree)&%h)"))) a
[1];
1269 /* A single element of a CONSTRUCTOR. VALUE holds the actual value of the
1270 element. INDEX can optionally design the position of VALUE: in arrays,
1271 it is the index where VALUE has to be placed; in structures, it is the
1272 FIELD_DECL of the member. */
1273 struct GTY(()) constructor_elt
{
1278 struct GTY(()) tree_constructor
{
1279 struct tree_typed typed
;
1280 vec
<constructor_elt
, va_gc
> *elts
;
1283 enum omp_clause_depend_kind
1285 OMP_CLAUSE_DEPEND_IN
,
1286 OMP_CLAUSE_DEPEND_OUT
,
1287 OMP_CLAUSE_DEPEND_INOUT
,
1288 OMP_CLAUSE_DEPEND_SOURCE
,
1289 OMP_CLAUSE_DEPEND_SINK
,
1290 OMP_CLAUSE_DEPEND_LAST
1293 enum omp_clause_proc_bind_kind
1295 /* Numbers should match omp_proc_bind_t enum in omp.h. */
1296 OMP_CLAUSE_PROC_BIND_FALSE
= 0,
1297 OMP_CLAUSE_PROC_BIND_TRUE
= 1,
1298 OMP_CLAUSE_PROC_BIND_MASTER
= 2,
1299 OMP_CLAUSE_PROC_BIND_CLOSE
= 3,
1300 OMP_CLAUSE_PROC_BIND_SPREAD
= 4,
1301 OMP_CLAUSE_PROC_BIND_LAST
1304 enum omp_clause_linear_kind
1306 OMP_CLAUSE_LINEAR_DEFAULT
,
1307 OMP_CLAUSE_LINEAR_REF
,
1308 OMP_CLAUSE_LINEAR_VAL
,
1309 OMP_CLAUSE_LINEAR_UVAL
1312 struct GTY(()) tree_exp
{
1313 struct tree_typed typed
;
1315 tree
GTY ((special ("tree_exp"),
1316 desc ("TREE_CODE ((tree) &%0)")))
1320 /* Immediate use linking structure. This structure is used for maintaining
1321 a doubly linked list of uses of an SSA_NAME. */
1322 struct GTY(()) ssa_use_operand_t
{
1323 struct ssa_use_operand_t
* GTY((skip(""))) prev
;
1324 struct ssa_use_operand_t
* GTY((skip(""))) next
;
1325 /* Immediate uses for a given SSA name are maintained as a cyclic
1326 list. To recognize the root of this list, the location field
1327 needs to point to the original SSA name. Since statements and
1328 SSA names are of different data types, we need this union. See
1329 the explanation in struct imm_use_iterator. */
1330 union { gimple
*stmt
; tree ssa_name
; } GTY((skip(""))) loc
;
1331 tree
*GTY((skip(""))) use
;
1334 struct GTY(()) tree_ssa_name
{
1335 struct tree_typed typed
;
1337 /* _DECL wrapped by this SSA name. */
1340 /* Statement that defines this SSA name. */
1343 /* Value range information. */
1344 union ssa_name_info_type
{
1345 /* Pointer attributes used for alias analysis. */
1346 struct GTY ((tag ("0"))) ptr_info_def
*ptr_info
;
1347 /* Value range attributes used for zero/sign extension elimination. */
1348 struct GTY ((tag ("1"))) range_info_def
*range_info
;
1349 } GTY ((desc ("%1.typed.type ?" \
1350 "!POINTER_TYPE_P (TREE_TYPE ((tree)&%1)) : 2"))) info
;
1352 /* Immediate uses list for this SSA_NAME. */
1353 struct ssa_use_operand_t imm_uses
;
1356 struct GTY(()) phi_arg_d
{
1357 /* imm_use MUST be the first element in struct because we do some
1358 pointer arithmetic with it. See phi_arg_index_from_use. */
1359 struct ssa_use_operand_t imm_use
;
1364 struct GTY(()) tree_omp_clause
{
1365 struct tree_common common
;
1367 enum omp_clause_code code
;
1368 union omp_clause_subcode
{
1369 enum omp_clause_default_kind default_kind
;
1370 enum omp_clause_schedule_kind schedule_kind
;
1371 enum omp_clause_depend_kind depend_kind
;
1372 /* See include/gomp-constants.h for enum gomp_map_kind's values. */
1373 unsigned int map_kind
;
1374 enum omp_clause_proc_bind_kind proc_bind_kind
;
1375 enum tree_code reduction_code
;
1376 enum omp_clause_linear_kind linear_kind
;
1377 enum tree_code if_modifier
;
1378 } GTY ((skip
)) subcode
;
1380 /* The gimplification of OMP_CLAUSE_REDUCTION_{INIT,MERGE} for omp-low's
1382 gimple_seq gimple_reduction_init
;
1383 gimple_seq gimple_reduction_merge
;
1385 tree
GTY ((length ("omp_clause_num_ops[OMP_CLAUSE_CODE ((tree)&%h)]")))
1389 struct GTY(()) tree_block
{
1390 struct tree_base base
;
1393 unsigned abstract_flag
: 1;
1394 unsigned block_num
: 31;
1397 location_t end_locus
;
1400 vec
<tree
, va_gc
> *nonlocalized_vars
;
1404 tree abstract_origin
;
1405 tree fragment_origin
;
1406 tree fragment_chain
;
1408 /* Pointer to the DWARF lexical block. */
1409 struct die_struct
*die
;
1412 struct GTY(()) tree_type_common
{
1413 struct tree_common common
;
1419 unsigned int precision
: 10;
1420 unsigned no_force_blk_flag
: 1;
1421 unsigned needs_constructing_flag
: 1;
1422 unsigned transparent_aggr_flag
: 1;
1423 unsigned restrict_flag
: 1;
1424 unsigned contains_placeholder_bits
: 2;
1426 ENUM_BITFIELD(machine_mode
) mode
: 8;
1428 unsigned string_flag
: 1;
1429 unsigned lang_flag_0
: 1;
1430 unsigned lang_flag_1
: 1;
1431 unsigned lang_flag_2
: 1;
1432 unsigned lang_flag_3
: 1;
1433 unsigned lang_flag_4
: 1;
1434 unsigned lang_flag_5
: 1;
1435 unsigned lang_flag_6
: 1;
1438 alias_set_type alias_set
;
1441 union tree_type_symtab
{
1442 int GTY ((tag ("TYPE_SYMTAB_IS_ADDRESS"))) address
;
1443 const char * GTY ((tag ("TYPE_SYMTAB_IS_POINTER"))) pointer
;
1444 struct die_struct
* GTY ((tag ("TYPE_SYMTAB_IS_DIE"))) die
;
1445 } GTY ((desc ("debug_hooks->tree_type_symtab_field"))) symtab
;
1453 struct GTY(()) tree_type_with_lang_specific
{
1454 struct tree_type_common common
;
1455 /* Points to a structure whose details depend on the language in use. */
1456 struct lang_type
*lang_specific
;
1459 struct GTY(()) tree_type_non_common
{
1460 struct tree_type_with_lang_specific with_lang_specific
;
1467 struct GTY (()) tree_binfo
{
1468 struct tree_common common
;
1474 vec
<tree
, va_gc
> *base_accesses
;
1480 vec
<tree
, va_gc
> base_binfos
;
1483 struct GTY(()) tree_decl_minimal
{
1484 struct tree_common common
;
1491 struct GTY(()) tree_decl_common
{
1492 struct tree_decl_minimal common
;
1495 ENUM_BITFIELD(machine_mode
) mode
: 8;
1497 unsigned nonlocal_flag
: 1;
1498 unsigned virtual_flag
: 1;
1499 unsigned ignored_flag
: 1;
1500 unsigned abstract_flag
: 1;
1501 unsigned artificial_flag
: 1;
1502 unsigned preserve_flag
: 1;
1503 unsigned debug_expr_is_from
: 1;
1505 unsigned lang_flag_0
: 1;
1506 unsigned lang_flag_1
: 1;
1507 unsigned lang_flag_2
: 1;
1508 unsigned lang_flag_3
: 1;
1509 unsigned lang_flag_4
: 1;
1510 unsigned lang_flag_5
: 1;
1511 unsigned lang_flag_6
: 1;
1512 unsigned lang_flag_7
: 1;
1513 unsigned lang_flag_8
: 1;
1515 /* In VAR_DECL and PARM_DECL, this is DECL_REGISTER. */
1516 unsigned decl_flag_0
: 1;
1517 /* In FIELD_DECL, this is DECL_BIT_FIELD
1518 In VAR_DECL and FUNCTION_DECL, this is DECL_EXTERNAL.
1519 In TYPE_DECL, this is TYPE_DECL_SUPPRESS_DEBUG. */
1520 unsigned decl_flag_1
: 1;
1521 /* In FIELD_DECL, this is DECL_NONADDRESSABLE_P
1522 In VAR_DECL, PARM_DECL and RESULT_DECL, this is
1523 DECL_HAS_VALUE_EXPR_P. */
1524 unsigned decl_flag_2
: 1;
1526 unsigned decl_flag_3
: 1;
1527 /* Logically, these two would go in a theoretical base shared by var and
1529 unsigned gimple_reg_flag
: 1;
1530 /* In VAR_DECL, PARM_DECL and RESULT_DECL, this is DECL_BY_REFERENCE. */
1531 unsigned decl_by_reference_flag
: 1;
1532 /* In a VAR_DECL and PARM_DECL, this is DECL_READ_P. */
1533 unsigned decl_read_flag
: 1;
1534 /* In a VAR_DECL or RESULT_DECL, this is DECL_NONSHAREABLE. */
1535 unsigned decl_nonshareable_flag
: 1;
1537 /* DECL_OFFSET_ALIGN, used only for FIELD_DECLs. */
1538 unsigned int off_align
: 8;
1540 /* 24 bits unused. */
1542 /* DECL_ALIGN. It should have the same size as TYPE_ALIGN. */
1545 /* UID for points-to sets, stable over copying from inlining. */
1546 unsigned int pt_uid
;
1551 tree abstract_origin
;
1553 /* Points to a structure whose details depend on the language in use. */
1554 struct lang_decl
*lang_specific
;
1557 struct GTY(()) tree_decl_with_rtl
{
1558 struct tree_decl_common common
;
1562 struct GTY(()) tree_field_decl
{
1563 struct tree_decl_common common
;
1566 tree bit_field_type
;
1572 struct GTY(()) tree_label_decl
{
1573 struct tree_decl_with_rtl common
;
1575 int eh_landing_pad_nr
;
1578 struct GTY(()) tree_result_decl
{
1579 struct tree_decl_with_rtl common
;
1582 struct GTY(()) tree_const_decl
{
1583 struct tree_decl_common common
;
1586 struct GTY(()) tree_parm_decl
{
1587 struct tree_decl_with_rtl common
;
1591 struct GTY(()) tree_decl_with_vis
{
1592 struct tree_decl_with_rtl common
;
1593 tree assembler_name
;
1594 struct symtab_node
*symtab_node
;
1596 /* Belong to VAR_DECL exclusively. */
1597 unsigned defer_output
: 1;
1598 unsigned hard_register
: 1;
1599 unsigned common_flag
: 1;
1600 unsigned in_text_section
: 1;
1601 unsigned in_constant_pool
: 1;
1602 unsigned dllimport_flag
: 1;
1603 /* Don't belong to VAR_DECL exclusively. */
1604 unsigned weak_flag
: 1;
1606 unsigned seen_in_bind_expr
: 1;
1607 unsigned comdat_flag
: 1;
1608 /* Used for FUNCTION_DECL, VAR_DECL and in C++ for TYPE_DECL. */
1609 ENUM_BITFIELD(symbol_visibility
) visibility
: 2;
1610 unsigned visibility_specified
: 1;
1612 /* Belong to FUNCTION_DECL exclusively. */
1613 unsigned init_priority_p
: 1;
1614 /* Used by C++ only. Might become a generic decl flag. */
1615 unsigned shadowed_for_var_p
: 1;
1616 /* Belong to FUNCTION_DECL exclusively. */
1617 unsigned cxx_constructor
: 1;
1618 /* Belong to FUNCTION_DECL exclusively. */
1619 unsigned cxx_destructor
: 1;
1620 /* Belong to FUNCTION_DECL exclusively. */
1622 /* Belong to FUNCTION_DECL exclusively. */
1623 unsigned regdecl_flag
: 1;
1624 /* 14 unused bits. */
1627 struct GTY(()) tree_var_decl
{
1628 struct tree_decl_with_vis common
;
1631 struct GTY(()) tree_decl_non_common
{
1632 struct tree_decl_with_vis common
;
1633 /* Almost all FE's use this. */
1637 /* FUNCTION_DECL inherits from DECL_NON_COMMON because of the use of the
1638 arguments/result/saved_tree fields by front ends. It was either inherit
1639 FUNCTION_DECL from non_common, or inherit non_common from FUNCTION_DECL,
1640 which seemed a bit strange. */
1642 struct GTY(()) tree_function_decl
{
1643 struct tree_decl_non_common common
;
1647 /* Arguments of the function. */
1649 /* The personality function. Used for stack unwinding. */
1652 /* Function specific options that are used by this function. */
1653 tree function_specific_target
; /* target options */
1654 tree function_specific_optimization
; /* optimization options */
1656 /* Generic function body. */
1658 /* Index within a virtual table. */
1661 /* In a FUNCTION_DECL for which DECL_BUILT_IN holds, this is
1662 DECL_FUNCTION_CODE. Otherwise unused.
1663 ??? The bitfield needs to be able to hold all target function
1665 ENUM_BITFIELD(built_in_function
) function_code
: 12;
1666 ENUM_BITFIELD(built_in_class
) built_in_class
: 2;
1668 unsigned static_ctor_flag
: 1;
1669 unsigned static_dtor_flag
: 1;
1671 unsigned uninlinable
: 1;
1672 unsigned possibly_inlined
: 1;
1673 unsigned novops_flag
: 1;
1674 unsigned returns_twice_flag
: 1;
1675 unsigned malloc_flag
: 1;
1676 unsigned operator_new_flag
: 1;
1677 unsigned declared_inline_flag
: 1;
1678 unsigned no_inline_warning_flag
: 1;
1680 unsigned no_instrument_function_entry_exit
: 1;
1681 unsigned no_limit_stack
: 1;
1682 unsigned disregard_inline_limits
: 1;
1683 unsigned pure_flag
: 1;
1684 unsigned looping_const_or_pure_flag
: 1;
1685 unsigned has_debug_args_flag
: 1;
1686 unsigned tm_clone_flag
: 1;
1687 unsigned versioned_function
: 1;
1691 struct GTY(()) tree_translation_unit_decl
{
1692 struct tree_decl_common common
;
1693 /* Source language of this translation unit. Used for DWARF output. */
1694 const char * GTY((skip(""))) language
;
1695 /* TODO: Non-optimization used to build this translation unit. */
1696 /* TODO: Root of a partial DWARF tree for global types and decls. */
1699 struct GTY(()) tree_type_decl
{
1700 struct tree_decl_non_common common
;
1704 struct GTY ((chain_next ("%h.next"), chain_prev ("%h.prev"))) tree_statement_list_node
1706 struct tree_statement_list_node
*prev
;
1707 struct tree_statement_list_node
*next
;
1711 struct GTY(()) tree_statement_list
1713 struct tree_typed typed
;
1714 struct tree_statement_list_node
*head
;
1715 struct tree_statement_list_node
*tail
;
1719 /* Optimization options used by a function. */
1721 struct GTY(()) tree_optimization_option
{
1722 struct tree_common common
;
1724 /* The optimization options used by the user. */
1725 struct cl_optimization
*opts
;
1727 /* Target optabs for this set of optimization options. This is of
1728 type `struct target_optabs *'. */
1729 void *GTY ((atomic
)) optabs
;
1731 /* The value of this_target_optabs against which the optabs above were
1733 struct target_optabs
*GTY ((skip
)) base_optabs
;
1736 /* Forward declaration, defined in target-globals.h. */
1738 struct GTY(()) target_globals
;
1740 /* Target options used by a function. */
1742 struct GTY(()) tree_target_option
{
1743 struct tree_common common
;
1745 /* Target globals for the corresponding target option. */
1746 struct target_globals
*globals
;
1748 /* The optimization options used by the user. */
1749 struct cl_target_option
*opts
;
1752 /* Define the overall contents of a tree node.
1753 It may be any of the structures declared above
1754 for various types of node. */
1755 union GTY ((ptr_alias (union lang_tree_node
),
1756 desc ("tree_node_structure (&%h)"), variable_size
)) tree_node
{
1757 struct tree_base
GTY ((tag ("TS_BASE"))) base
;
1758 struct tree_typed
GTY ((tag ("TS_TYPED"))) typed
;
1759 struct tree_common
GTY ((tag ("TS_COMMON"))) common
;
1760 struct tree_int_cst
GTY ((tag ("TS_INT_CST"))) int_cst
;
1761 struct tree_real_cst
GTY ((tag ("TS_REAL_CST"))) real_cst
;
1762 struct tree_fixed_cst
GTY ((tag ("TS_FIXED_CST"))) fixed_cst
;
1763 struct tree_vector
GTY ((tag ("TS_VECTOR"))) vector
;
1764 struct tree_string
GTY ((tag ("TS_STRING"))) string
;
1765 struct tree_complex
GTY ((tag ("TS_COMPLEX"))) complex;
1766 struct tree_identifier
GTY ((tag ("TS_IDENTIFIER"))) identifier
;
1767 struct tree_decl_minimal
GTY((tag ("TS_DECL_MINIMAL"))) decl_minimal
;
1768 struct tree_decl_common
GTY ((tag ("TS_DECL_COMMON"))) decl_common
;
1769 struct tree_decl_with_rtl
GTY ((tag ("TS_DECL_WRTL"))) decl_with_rtl
;
1770 struct tree_decl_non_common
GTY ((tag ("TS_DECL_NON_COMMON")))
1772 struct tree_parm_decl
GTY ((tag ("TS_PARM_DECL"))) parm_decl
;
1773 struct tree_decl_with_vis
GTY ((tag ("TS_DECL_WITH_VIS"))) decl_with_vis
;
1774 struct tree_var_decl
GTY ((tag ("TS_VAR_DECL"))) var_decl
;
1775 struct tree_field_decl
GTY ((tag ("TS_FIELD_DECL"))) field_decl
;
1776 struct tree_label_decl
GTY ((tag ("TS_LABEL_DECL"))) label_decl
;
1777 struct tree_result_decl
GTY ((tag ("TS_RESULT_DECL"))) result_decl
;
1778 struct tree_const_decl
GTY ((tag ("TS_CONST_DECL"))) const_decl
;
1779 struct tree_type_decl
GTY ((tag ("TS_TYPE_DECL"))) type_decl
;
1780 struct tree_function_decl
GTY ((tag ("TS_FUNCTION_DECL"))) function_decl
;
1781 struct tree_translation_unit_decl
GTY ((tag ("TS_TRANSLATION_UNIT_DECL")))
1782 translation_unit_decl
;
1783 struct tree_type_common
GTY ((tag ("TS_TYPE_COMMON"))) type_common
;
1784 struct tree_type_with_lang_specific
GTY ((tag ("TS_TYPE_WITH_LANG_SPECIFIC")))
1785 type_with_lang_specific
;
1786 struct tree_type_non_common
GTY ((tag ("TS_TYPE_NON_COMMON")))
1788 struct tree_list
GTY ((tag ("TS_LIST"))) list
;
1789 struct tree_vec
GTY ((tag ("TS_VEC"))) vec
;
1790 struct tree_exp
GTY ((tag ("TS_EXP"))) exp
;
1791 struct tree_ssa_name
GTY ((tag ("TS_SSA_NAME"))) ssa_name
;
1792 struct tree_block
GTY ((tag ("TS_BLOCK"))) block
;
1793 struct tree_binfo
GTY ((tag ("TS_BINFO"))) binfo
;
1794 struct tree_statement_list
GTY ((tag ("TS_STATEMENT_LIST"))) stmt_list
;
1795 struct tree_constructor
GTY ((tag ("TS_CONSTRUCTOR"))) constructor
;
1796 struct tree_omp_clause
GTY ((tag ("TS_OMP_CLAUSE"))) omp_clause
;
1797 struct tree_optimization_option
GTY ((tag ("TS_OPTIMIZATION"))) optimization
;
1798 struct tree_target_option
GTY ((tag ("TS_TARGET_OPTION"))) target_option
;
1801 /* Structure describing an attribute and a function to handle it. */
1802 struct attribute_spec
{
1803 /* The name of the attribute (without any leading or trailing __),
1804 or NULL to mark the end of a table of attributes. */
1806 /* The minimum length of the list of arguments of the attribute. */
1808 /* The maximum length of the list of arguments of the attribute
1809 (-1 for no maximum). */
1811 /* Whether this attribute requires a DECL. If it does, it will be passed
1812 from types of DECLs, function return types and array element types to
1813 the DECLs, function types and array types respectively; but when
1814 applied to a type in any other circumstances, it will be ignored with
1815 a warning. (If greater control is desired for a given attribute,
1816 this should be false, and the flags argument to the handler may be
1817 used to gain greater control in that case.) */
1819 /* Whether this attribute requires a type. If it does, it will be passed
1820 from a DECL to the type of that DECL. */
1822 /* Whether this attribute requires a function (or method) type. If it does,
1823 it will be passed from a function pointer type to the target type,
1824 and from a function return type (which is not itself a function
1825 pointer type) to the function type. */
1826 bool function_type_required
;
1827 /* Function to handle this attribute. NODE points to the node to which
1828 the attribute is to be applied. If a DECL, it should be modified in
1829 place; if a TYPE, a copy should be created. NAME is the name of the
1830 attribute (possibly with leading or trailing __). ARGS is the TREE_LIST
1831 of the arguments (which may be NULL). FLAGS gives further information
1832 about the context of the attribute. Afterwards, the attributes will
1833 be added to the DECL_ATTRIBUTES or TYPE_ATTRIBUTES, as appropriate,
1834 unless *NO_ADD_ATTRS is set to true (which should be done on error,
1835 as well as in any other cases when the attributes should not be added
1836 to the DECL or TYPE). Depending on FLAGS, any attributes to be
1837 applied to another type or DECL later may be returned;
1838 otherwise the return value should be NULL_TREE. This pointer may be
1839 NULL if no special handling is required beyond the checks implied
1840 by the rest of this structure. */
1841 tree (*handler
) (tree
*node
, tree name
, tree args
,
1842 int flags
, bool *no_add_attrs
);
1843 /* Specifies if attribute affects type's identity. */
1844 bool affects_type_identity
;
1847 /* These functions allow a front-end to perform a manual layout of a
1848 RECORD_TYPE. (For instance, if the placement of subsequent fields
1849 depends on the placement of fields so far.) Begin by calling
1850 start_record_layout. Then, call place_field for each of the
1851 fields. Then, call finish_record_layout. See layout_type for the
1852 default way in which these functions are used. */
1853 typedef struct record_layout_info_s
{
1854 /* The RECORD_TYPE that we are laying out. */
1856 /* The offset into the record so far, in bytes, not including bits in
1859 /* The last known alignment of SIZE. */
1860 unsigned int offset_align
;
1861 /* The bit position within the last OFFSET_ALIGN bits, in bits. */
1863 /* The alignment of the record so far, in bits. */
1864 unsigned int record_align
;
1865 /* The alignment of the record so far, ignoring #pragma pack and
1866 __attribute__ ((packed)), in bits. */
1867 unsigned int unpacked_align
;
1868 /* The previous field laid out. */
1870 /* The static variables (i.e., class variables, as opposed to
1871 instance variables) encountered in T. */
1872 vec
<tree
, va_gc
> *pending_statics
;
1873 /* Bits remaining in the current alignment group */
1874 int remaining_in_alignment
;
1875 /* True if we've seen a packed field that didn't have normal
1876 alignment anyway. */
1877 int packed_maybe_necessary
;
1878 } *record_layout_info
;
1880 /* Iterator for going through the function arguments. */
1881 struct function_args_iterator
{
1882 tree next
; /* TREE_LIST pointing to the next argument */
1885 /* Structures to map from a tree to another tree. */
1886 struct GTY(()) tree_map_base
{
1890 /* Map from a tree to another tree. */
1892 struct GTY((for_user
)) tree_map
{
1893 struct tree_map_base base
;
1898 /* Map from a decl tree to another tree. */
1899 struct GTY((for_user
)) tree_decl_map
{
1900 struct tree_map_base base
;
1904 /* Map from a tree to an int. */
1905 struct GTY((for_user
)) tree_int_map
{
1906 struct tree_map_base base
;
1910 /* Map from a decl tree to a tree vector. */
1911 struct GTY((for_user
)) tree_vec_map
{
1912 struct tree_map_base base
;
1913 vec
<tree
, va_gc
> *to
;
1916 /* Abstract iterators for CALL_EXPRs. These static inline definitions
1917 have to go towards the end of tree.h so that union tree_node is fully
1918 defined by this point. */
1920 /* Structure containing iterator state. */
1921 struct call_expr_arg_iterator
{
1922 tree t
; /* the call_expr */
1923 int n
; /* argument count */
1924 int i
; /* next argument index */
1927 struct const_call_expr_arg_iterator
{
1928 const_tree t
; /* the call_expr */
1929 int n
; /* argument count */
1930 int i
; /* next argument index */
1933 /* The builtin_info structure holds the FUNCTION_DECL of the standard builtin
1934 function, and flags. */
1935 struct GTY(()) builtin_info_type
{
1937 /* Whether the user can use <xxx> instead of explicitly using calls
1938 to __builtin_<xxx>. */
1939 unsigned implicit_p
: 1;
1940 /* Whether the user has provided a declaration of <xxx>. */
1941 unsigned declared_p
: 1;
1945 /*---------------------------------------------------------------------------
1947 ---------------------------------------------------------------------------*/
1948 /* Matrix describing the structures contained in a given tree code. */
1949 extern unsigned char tree_contains_struct
[MAX_TREE_CODES
][64];
1951 /* Class of tree given its code. */
1952 extern const enum tree_code_class tree_code_type
[];
1954 /* Each tree code class has an associated string representation.
1955 These must correspond to the tree_code_class entries. */
1956 extern const char *const tree_code_class_strings
[];
1958 /* Number of argument-words in each kind of tree-node. */
1959 extern const unsigned char tree_code_length
[];
1961 /* Vector of all alias pairs for global symbols. */
1962 extern GTY(()) vec
<alias_pair
, va_gc
> *alias_pairs
;
1964 /* Names of all the built_in classes. */
1965 extern const char *const built_in_class_names
[BUILT_IN_LAST
];
1967 /* Names of all the built_in functions. */
1968 extern const char * built_in_names
[(int) END_BUILTINS
];
1970 /* Number of operands and names for each OMP_CLAUSE node. */
1971 extern unsigned const char omp_clause_num_ops
[];
1972 extern const char * const omp_clause_code_name
[];
1974 /* A vector of all translation-units. */
1975 extern GTY (()) vec
<tree
, va_gc
> *all_translation_units
;
1977 /* Vector of standard trees used by the C compiler. */
1978 extern GTY(()) tree global_trees
[TI_MAX
];
1980 /* The standard C integer types. Use integer_type_kind to index into
1982 extern GTY(()) tree integer_types
[itk_none
];
1984 /* Types used to represent sizes. */
1985 extern GTY(()) tree sizetype_tab
[(int) stk_type_kind_last
];
1987 /* Arrays for keeping track of tree node statistics. */
1988 extern int tree_node_counts
[];
1989 extern int tree_node_sizes
[];
1991 /* True if we are in gimple form and the actions of the folders need to
1992 be restricted. False if we are not in gimple form and folding is not
1993 restricted to creating gimple expressions. */
1994 extern bool in_gimple_form
;
1996 /* Functional interface to the builtin functions. */
1997 extern GTY(()) builtin_info_type builtin_info
[(int)END_BUILTINS
];
1999 /* If nonzero, an upper limit on alignment of structure fields, in bits, */
2000 extern unsigned int maximum_field_alignment
;
2002 /* Points to the FUNCTION_DECL of the function whose body we are reading. */
2003 extern GTY(()) tree current_function_decl
;
2005 /* Nonzero means a FUNC_BEGIN label was emitted. */
2006 extern GTY(()) const char * current_function_func_begin_label
;
2008 #endif // GCC_TREE_CORE_H