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 ). */
463 /* OpenMP internal-only clause to specify grid dimensions of a gridified
469 #define DEFTREESTRUCT(ENUM, NAME) ENUM,
470 enum tree_node_structure_enum
{
471 #include "treestruct.def"
476 enum omp_clause_schedule_kind
{
477 OMP_CLAUSE_SCHEDULE_STATIC
,
478 OMP_CLAUSE_SCHEDULE_DYNAMIC
,
479 OMP_CLAUSE_SCHEDULE_GUIDED
,
480 OMP_CLAUSE_SCHEDULE_AUTO
,
481 OMP_CLAUSE_SCHEDULE_RUNTIME
,
482 OMP_CLAUSE_SCHEDULE_CILKFOR
,
483 OMP_CLAUSE_SCHEDULE_MASK
= (1 << 3) - 1,
484 OMP_CLAUSE_SCHEDULE_MONOTONIC
= (1 << 3),
485 OMP_CLAUSE_SCHEDULE_NONMONOTONIC
= (1 << 4),
486 OMP_CLAUSE_SCHEDULE_LAST
= 2 * OMP_CLAUSE_SCHEDULE_NONMONOTONIC
- 1
489 enum omp_clause_default_kind
{
490 OMP_CLAUSE_DEFAULT_UNSPECIFIED
,
491 OMP_CLAUSE_DEFAULT_SHARED
,
492 OMP_CLAUSE_DEFAULT_NONE
,
493 OMP_CLAUSE_DEFAULT_PRIVATE
,
494 OMP_CLAUSE_DEFAULT_FIRSTPRIVATE
,
495 OMP_CLAUSE_DEFAULT_LAST
498 /* There is a TYPE_QUAL value for each type qualifier. They can be
499 combined by bitwise-or to form the complete set of qualifiers for a
502 TYPE_UNQUALIFIED
= 0x0,
503 TYPE_QUAL_CONST
= 0x1,
504 TYPE_QUAL_VOLATILE
= 0x2,
505 TYPE_QUAL_RESTRICT
= 0x4,
506 TYPE_QUAL_ATOMIC
= 0x8
509 /* Standard named or nameless data types of the C compiler. */
539 TI_INTEGER_MINUS_ONE
,
556 TI_COMPLEX_INTEGER_TYPE
,
557 TI_COMPLEX_FLOAT_TYPE
,
558 TI_COMPLEX_DOUBLE_TYPE
,
559 TI_COMPLEX_LONG_DOUBLE_TYPE
,
567 TI_LONG_DOUBLE_PTR_TYPE
,
577 TI_VA_LIST_GPR_COUNTER_FIELD
,
578 TI_VA_LIST_FPR_COUNTER_FIELD
,
581 TI_POINTER_SIZED_TYPE
,
583 TI_POINTER_BOUNDS_TYPE
,
588 TI_DFLOAT32_PTR_TYPE
,
589 TI_DFLOAT64_PTR_TYPE
,
590 TI_DFLOAT128_PTR_TYPE
,
603 TI_SAT_ULLFRACT_TYPE
,
619 TI_SAT_ULLACCUM_TYPE
,
665 TI_OPTIMIZATION_DEFAULT
,
666 TI_OPTIMIZATION_CURRENT
,
667 TI_TARGET_OPTION_DEFAULT
,
668 TI_TARGET_OPTION_CURRENT
,
669 TI_CURRENT_TARGET_PRAGMA
,
670 TI_CURRENT_OPTIMIZE_PRAGMA
,
675 /* An enumeration of the standard C integer types. These must be
676 ordered so that shorter types appear before longer ones, and so
677 that signed types appear before unsigned ones, for the correct
678 functioning of interpret_integer() in c-lex.c. */
679 enum integer_type_kind
{
690 itk_unsigned_long_long
,
704 /* A pointer-to-function member type looks like:
711 If __pfn is NULL, it is a NULL pointer-to-member-function.
713 (Because the vtable is always the first thing in the object, we
714 don't need its offset.) If the function is virtual, then PFN is
715 one plus twice the index into the vtable; otherwise, it is just a
716 pointer to the function.
718 Unfortunately, using the lowest bit of PFN doesn't work in
719 architectures that don't impose alignment requirements on function
720 addresses, or that use the lowest bit to tell one ISA from another,
721 for example. For such architectures, we use the lowest bit of
722 DELTA instead of the lowest bit of the PFN, and DELTA will be
724 enum ptrmemfunc_vbit_where_t
{
725 ptrmemfunc_vbit_in_pfn
,
726 ptrmemfunc_vbit_in_delta
729 /* Flags that may be passed in the third argument of decl_attributes, and
730 to handler functions for attributes. */
731 enum attribute_flags
{
732 /* The type passed in is the type of a DECL, and any attributes that
733 should be passed in again to be applied to the DECL rather than the
734 type should be returned. */
735 ATTR_FLAG_DECL_NEXT
= 1,
736 /* The type passed in is a function return type, and any attributes that
737 should be passed in again to be applied to the function type rather
738 than the return type should be returned. */
739 ATTR_FLAG_FUNCTION_NEXT
= 2,
740 /* The type passed in is an array element type, and any attributes that
741 should be passed in again to be applied to the array type rather
742 than the element type should be returned. */
743 ATTR_FLAG_ARRAY_NEXT
= 4,
744 /* The type passed in is a structure, union or enumeration type being
745 created, and should be modified in place. */
746 ATTR_FLAG_TYPE_IN_PLACE
= 8,
747 /* The attributes are being applied by default to a library function whose
748 name indicates known behavior, and should be silently ignored if they
749 are not in fact compatible with the function type. */
750 ATTR_FLAG_BUILT_IN
= 16,
751 /* A given attribute has been parsed as a C++-11 attribute. */
755 /* Types used to represent sizes. */
756 enum size_type_kind
{
757 stk_sizetype
, /* Normal representation of sizes in bytes. */
758 stk_ssizetype
, /* Signed representation of sizes in bytes. */
759 stk_bitsizetype
, /* Normal representation of sizes in bits. */
760 stk_sbitsizetype
, /* Signed representation of sizes in bits. */
764 enum operand_equal_flag
{
767 OEP_MATCH_SIDE_EFFECTS
= 4,
771 /* Enum and arrays used for tree allocation stats.
772 Keep in sync with tree.c:tree_node_kind_names. */
773 enum tree_node_kind
{
793 enum annot_expr_kind
{
794 annot_expr_ivdep_kind
,
795 annot_expr_no_vector_kind
,
796 annot_expr_vector_kind
,
800 /*---------------------------------------------------------------------------
802 ---------------------------------------------------------------------------*/
803 /* When processing aliases at the symbol table level, we need the
804 declaration of target. For this reason we need to queue aliases and
805 process them after all declarations has been produced. */
806 struct GTY(()) alias_pair
{
811 /* An initialization priority. */
812 typedef unsigned short priority_type
;
814 /* The type of a callback function for walking over tree structure. */
815 typedef tree (*walk_tree_fn
) (tree
*, int *, void *);
817 /* The type of a callback function that represents a custom walk_tree. */
818 typedef tree (*walk_tree_lh
) (tree
*, int *, tree (*) (tree
*, int *, void *),
819 void *, hash_set
<tree
> *);
822 /*---------------------------------------------------------------------------
824 ---------------------------------------------------------------------------*/
825 /* A tree node can represent a data type, a variable, an expression
826 or a statement. Each node has a TREE_CODE which says what kind of
827 thing it represents. Some common codes are:
828 INTEGER_TYPE -- represents a type of integers.
829 ARRAY_TYPE -- represents a type of pointer.
830 VAR_DECL -- represents a declared variable.
831 INTEGER_CST -- represents a constant integer value.
832 PLUS_EXPR -- represents a sum (an expression).
834 As for the contents of a tree node: there are some fields
835 that all nodes share. Each TREE_CODE has various special-purpose
836 fields as well. The fields of a node are never accessed directly,
837 always through accessor macros. */
839 /* Every kind of tree node starts with this structure,
840 so all nodes have these fields.
842 See the accessor macros, defined below, for documentation of the
843 fields, and the table below which connects the fields and the
846 struct GTY(()) tree_base
{
847 ENUM_BITFIELD(tree_code
) code
: 16;
849 unsigned side_effects_flag
: 1;
850 unsigned constant_flag
: 1;
851 unsigned addressable_flag
: 1;
852 unsigned volatile_flag
: 1;
853 unsigned readonly_flag
: 1;
854 unsigned asm_written_flag
: 1;
855 unsigned nowarning_flag
: 1;
856 unsigned visited
: 1;
858 unsigned used_flag
: 1;
859 unsigned nothrow_flag
: 1;
860 unsigned static_flag
: 1;
861 unsigned public_flag
: 1;
862 unsigned private_flag
: 1;
863 unsigned protected_flag
: 1;
864 unsigned deprecated_flag
: 1;
865 unsigned default_def_flag
: 1;
868 /* The bits in the following structure should only be used with
869 accessor macros that constrain inputs with tree checking. */
871 unsigned lang_flag_0
: 1;
872 unsigned lang_flag_1
: 1;
873 unsigned lang_flag_2
: 1;
874 unsigned lang_flag_3
: 1;
875 unsigned lang_flag_4
: 1;
876 unsigned lang_flag_5
: 1;
877 unsigned lang_flag_6
: 1;
878 unsigned saturating_flag
: 1;
880 unsigned unsigned_flag
: 1;
881 unsigned packed_flag
: 1;
882 unsigned user_align
: 1;
883 unsigned nameless_flag
: 1;
884 unsigned atomic_flag
: 1;
889 /* This field is only used with TREE_TYPE nodes; the only reason it is
890 present in tree_base instead of tree_type is to save space. The size
891 of the field must be large enough to hold addr_space_t values. */
892 unsigned address_space
: 8;
895 /* The following fields are present in tree_base to save space. The
896 nodes using them do not require any of the flags above and so can
897 make better use of the 4-byte sized word. */
899 /* The number of HOST_WIDE_INTs in an INTEGER_CST. */
901 /* The number of HOST_WIDE_INTs if the INTEGER_CST is accessed in
902 its native precision. */
903 unsigned char unextended
;
905 /* The number of HOST_WIDE_INTs if the INTEGER_CST is extended to
906 wider precisions based on its TYPE_SIGN. */
907 unsigned char extended
;
909 /* The number of HOST_WIDE_INTs if the INTEGER_CST is accessed in
910 offset_int precision, with smaller integers being extended
911 according to their TYPE_SIGN. This is equal to one of the two
912 fields above but is cached for speed. */
913 unsigned char offset
;
916 /* VEC length. This field is only used with TREE_VEC. */
919 /* SSA version number. This field is only used with SSA_NAME. */
920 unsigned int version
;
922 /* Internal function code. */
923 enum internal_fn ifn
;
925 /* The following two fields are used for MEM_REF and TARGET_MEM_REF
926 expression trees and specify known data non-dependences. For
927 two memory references in a function they are known to not
928 alias if dependence_info.clique are equal and dependence_info.base
931 unsigned short clique
;
937 /* The following table lists the uses of each of the above flags and
938 for which types of nodes they are defined.
943 VAR_DECL, PARM_DECL, RESULT_DECL, FUNCTION_DECL, LABEL_DECL
946 CONSTRUCTOR, IDENTIFIER_NODE
949 CALL_EXPR_TAILCALL in
955 PREDICT_EXPR_OUTCOME in
961 VAR_DECL, FUNCTION_DECL
964 TREE_NO_TRAMPOLINE in
970 TREE_SYMBOL_REFERENCED in
974 TARGET_EXPR, WITH_CLEANUP_EXPR
976 TRY_CATCH_IS_CLEANUP in
982 TYPE_REF_CAN_ALIAS_ALL in
983 POINTER_TYPE, REFERENCE_TYPE
991 TRANSACTION_EXPR_OUTER in
994 SSA_NAME_ANTI_RANGE_P in
1000 INTEGER_CST, REAL_CST, COMPLEX_CST, VECTOR_CST
1003 VAR_DECL, FUNCTION_DECL
1006 CONSTRUCTOR_NO_CLEARING in
1012 CALL_EXPR_VA_ARG_PACK in
1015 TYPE_CACHED_VALUES_P in
1018 SAVE_EXPR_RESOLVED_P in
1021 OMP_CLAUSE_LASTPRIVATE_FIRSTPRIVATE in
1022 OMP_CLAUSE_LASTPRIVATE
1024 OMP_CLAUSE_PRIVATE_DEBUG in
1027 OMP_CLAUSE_LINEAR_NO_COPYIN in
1030 OMP_CLAUSE_MAP_ZERO_BIAS_ARRAY_SECTION in
1033 OMP_CLAUSE_REDUCTION_OMP_ORIG_REF in
1034 OMP_CLAUSE_REDUCTION
1036 TRANSACTION_EXPR_RELAXED in
1044 CALL_EXPR_RETURN_SLOT_OPT in
1050 OMP_PARALLEL_COMBINED in
1053 OMP_ATOMIC_SEQ_CST in
1056 OMP_CLAUSE_PRIVATE_OUTER_REF in
1059 OMP_CLAUSE_LINEAR_NO_COPYOUT in
1062 TYPE_REF_IS_RVALUE in
1074 CALL_FROM_THUNK_P and
1075 CALL_ALLOCA_FOR_VAR_P in
1078 OMP_CLAUSE_LINEAR_VARIABLE_STRIDE in
1083 TREE_SIDE_EFFECTS in
1093 TREE_THIS_VOLATILE in
1116 TYPE_SIZES_GIMPLIFIED in
1130 VAR_DECL, FUNCTION_DECL, TYPE_DECL
1131 RECORD_TYPE, UNION_TYPE, QUAL_UNION_TYPE
1134 SSA_NAME_OCCURS_IN_ABNORMAL_PHI in
1154 INDIRECT_REF, MEM_REF, TARGET_MEM_REF, ARRAY_REF, ARRAY_RANGE_REF
1156 SSA_NAME_IN_FREE_LIST in
1168 IDENTIFIER_TRANSPARENT_ALIAS in
1174 all trees (used liberally by many passes)
1178 TYPE_REVERSE_STORAGE_ORDER in
1179 RECORD_TYPE, UNION_TYPE, QUAL_UNION_TYPE, ARRAY_TYPE
1184 VAR_DECL_IS_VIRTUAL_OPERAND in
1199 RECORD_TYPE, UNION_TYPE and QUAL_UNION_TYPE
1201 TYPE_VECTOR_OPAQUE in
1204 SSA_NAME_IS_DEFAULT_DEF in
1207 DECL_NONLOCAL_FRAME in
1210 REF_REVERSE_STORAGE_ORDER in
1211 BIT_FIELD_REF, MEM_REF
1214 struct GTY(()) tree_typed
{
1215 struct tree_base base
;
1219 struct GTY(()) tree_common
{
1220 struct tree_typed typed
;
1224 struct GTY(()) tree_int_cst
{
1225 struct tree_typed typed
;
1226 HOST_WIDE_INT val
[1];
1230 struct GTY(()) tree_real_cst
{
1231 struct tree_typed typed
;
1232 struct real_value
* real_cst_ptr
;
1235 struct GTY(()) tree_fixed_cst
{
1236 struct tree_typed typed
;
1237 struct fixed_value
* fixed_cst_ptr
;
1240 struct GTY(()) tree_string
{
1241 struct tree_typed typed
;
1246 struct GTY(()) tree_complex
{
1247 struct tree_typed typed
;
1252 struct GTY(()) tree_vector
{
1253 struct tree_typed typed
;
1254 tree
GTY ((length ("TYPE_VECTOR_SUBPARTS (TREE_TYPE ((tree)&%h))"))) elts
[1];
1257 struct GTY(()) tree_identifier
{
1258 struct tree_common common
;
1259 struct ht_identifier id
;
1262 struct GTY(()) tree_list
{
1263 struct tree_common common
;
1268 struct GTY(()) tree_vec
{
1269 struct tree_common common
;
1270 tree
GTY ((length ("TREE_VEC_LENGTH ((tree)&%h)"))) a
[1];
1273 /* A single element of a CONSTRUCTOR. VALUE holds the actual value of the
1274 element. INDEX can optionally design the position of VALUE: in arrays,
1275 it is the index where VALUE has to be placed; in structures, it is the
1276 FIELD_DECL of the member. */
1277 struct GTY(()) constructor_elt
{
1282 struct GTY(()) tree_constructor
{
1283 struct tree_typed typed
;
1284 vec
<constructor_elt
, va_gc
> *elts
;
1287 enum omp_clause_depend_kind
1289 OMP_CLAUSE_DEPEND_IN
,
1290 OMP_CLAUSE_DEPEND_OUT
,
1291 OMP_CLAUSE_DEPEND_INOUT
,
1292 OMP_CLAUSE_DEPEND_SOURCE
,
1293 OMP_CLAUSE_DEPEND_SINK
,
1294 OMP_CLAUSE_DEPEND_LAST
1297 enum omp_clause_proc_bind_kind
1299 /* Numbers should match omp_proc_bind_t enum in omp.h. */
1300 OMP_CLAUSE_PROC_BIND_FALSE
= 0,
1301 OMP_CLAUSE_PROC_BIND_TRUE
= 1,
1302 OMP_CLAUSE_PROC_BIND_MASTER
= 2,
1303 OMP_CLAUSE_PROC_BIND_CLOSE
= 3,
1304 OMP_CLAUSE_PROC_BIND_SPREAD
= 4,
1305 OMP_CLAUSE_PROC_BIND_LAST
1308 enum omp_clause_linear_kind
1310 OMP_CLAUSE_LINEAR_DEFAULT
,
1311 OMP_CLAUSE_LINEAR_REF
,
1312 OMP_CLAUSE_LINEAR_VAL
,
1313 OMP_CLAUSE_LINEAR_UVAL
1316 struct GTY(()) tree_exp
{
1317 struct tree_typed typed
;
1319 tree
GTY ((special ("tree_exp"),
1320 desc ("TREE_CODE ((tree) &%0)")))
1324 /* Immediate use linking structure. This structure is used for maintaining
1325 a doubly linked list of uses of an SSA_NAME. */
1326 struct GTY(()) ssa_use_operand_t
{
1327 struct ssa_use_operand_t
* GTY((skip(""))) prev
;
1328 struct ssa_use_operand_t
* GTY((skip(""))) next
;
1329 /* Immediate uses for a given SSA name are maintained as a cyclic
1330 list. To recognize the root of this list, the location field
1331 needs to point to the original SSA name. Since statements and
1332 SSA names are of different data types, we need this union. See
1333 the explanation in struct imm_use_iterator. */
1334 union { gimple
*stmt
; tree ssa_name
; } GTY((skip(""))) loc
;
1335 tree
*GTY((skip(""))) use
;
1338 struct GTY(()) tree_ssa_name
{
1339 struct tree_typed typed
;
1341 /* _DECL wrapped by this SSA name. */
1344 /* Statement that defines this SSA name. */
1347 /* Value range information. */
1348 union ssa_name_info_type
{
1349 /* Pointer attributes used for alias analysis. */
1350 struct GTY ((tag ("0"))) ptr_info_def
*ptr_info
;
1351 /* Value range attributes used for zero/sign extension elimination. */
1352 struct GTY ((tag ("1"))) range_info_def
*range_info
;
1353 } GTY ((desc ("%1.typed.type ?" \
1354 "!POINTER_TYPE_P (TREE_TYPE ((tree)&%1)) : 2"))) info
;
1356 /* Immediate uses list for this SSA_NAME. */
1357 struct ssa_use_operand_t imm_uses
;
1360 struct GTY(()) phi_arg_d
{
1361 /* imm_use MUST be the first element in struct because we do some
1362 pointer arithmetic with it. See phi_arg_index_from_use. */
1363 struct ssa_use_operand_t imm_use
;
1368 struct GTY(()) tree_omp_clause
{
1369 struct tree_common common
;
1371 enum omp_clause_code code
;
1372 union omp_clause_subcode
{
1373 enum omp_clause_default_kind default_kind
;
1374 enum omp_clause_schedule_kind schedule_kind
;
1375 enum omp_clause_depend_kind depend_kind
;
1376 /* See include/gomp-constants.h for enum gomp_map_kind's values. */
1377 unsigned int map_kind
;
1378 enum omp_clause_proc_bind_kind proc_bind_kind
;
1379 enum tree_code reduction_code
;
1380 enum omp_clause_linear_kind linear_kind
;
1381 enum tree_code if_modifier
;
1382 /* The dimension a OMP_CLAUSE__GRIDDIM_ clause of a gridified target
1383 construct describes. */
1384 unsigned int dimension
;
1385 } GTY ((skip
)) subcode
;
1387 /* The gimplification of OMP_CLAUSE_REDUCTION_{INIT,MERGE} for omp-low's
1389 gimple_seq gimple_reduction_init
;
1390 gimple_seq gimple_reduction_merge
;
1392 tree
GTY ((length ("omp_clause_num_ops[OMP_CLAUSE_CODE ((tree)&%h)]")))
1396 struct GTY(()) tree_block
{
1397 struct tree_base base
;
1400 unsigned abstract_flag
: 1;
1401 unsigned block_num
: 31;
1404 location_t end_locus
;
1407 vec
<tree
, va_gc
> *nonlocalized_vars
;
1411 tree abstract_origin
;
1412 tree fragment_origin
;
1413 tree fragment_chain
;
1415 /* Pointer to the DWARF lexical block. */
1416 struct die_struct
*die
;
1419 struct GTY(()) tree_type_common
{
1420 struct tree_common common
;
1426 unsigned int precision
: 10;
1427 unsigned no_force_blk_flag
: 1;
1428 unsigned needs_constructing_flag
: 1;
1429 unsigned transparent_aggr_flag
: 1;
1430 unsigned restrict_flag
: 1;
1431 unsigned contains_placeholder_bits
: 2;
1433 ENUM_BITFIELD(machine_mode
) mode
: 8;
1435 unsigned string_flag
: 1;
1436 unsigned lang_flag_0
: 1;
1437 unsigned lang_flag_1
: 1;
1438 unsigned lang_flag_2
: 1;
1439 unsigned lang_flag_3
: 1;
1440 unsigned lang_flag_4
: 1;
1441 unsigned lang_flag_5
: 1;
1442 unsigned lang_flag_6
: 1;
1444 /* TYPE_ALIGN in log2; this has to be large enough to hold values
1445 of the maximum of BIGGEST_ALIGNMENT and MAX_OFILE_ALIGNMENT,
1446 the latter being usually the larger. For ELF it is 8<<28,
1447 so we need to store the value 32 (not 31, as we need the zero
1448 as well), hence six bits. */
1450 unsigned spare
: 26;
1451 alias_set_type alias_set
;
1454 union tree_type_symtab
{
1455 int GTY ((tag ("TYPE_SYMTAB_IS_ADDRESS"))) address
;
1456 const char * GTY ((tag ("TYPE_SYMTAB_IS_POINTER"))) pointer
;
1457 struct die_struct
* GTY ((tag ("TYPE_SYMTAB_IS_DIE"))) die
;
1458 } GTY ((desc ("debug_hooks->tree_type_symtab_field"))) symtab
;
1466 struct GTY(()) tree_type_with_lang_specific
{
1467 struct tree_type_common common
;
1468 /* Points to a structure whose details depend on the language in use. */
1469 struct lang_type
*lang_specific
;
1472 struct GTY(()) tree_type_non_common
{
1473 struct tree_type_with_lang_specific with_lang_specific
;
1480 struct GTY (()) tree_binfo
{
1481 struct tree_common common
;
1487 vec
<tree
, va_gc
> *base_accesses
;
1493 vec
<tree
, va_gc
> base_binfos
;
1496 struct GTY(()) tree_decl_minimal
{
1497 struct tree_common common
;
1504 struct GTY(()) tree_decl_common
{
1505 struct tree_decl_minimal common
;
1508 ENUM_BITFIELD(machine_mode
) mode
: 8;
1510 unsigned nonlocal_flag
: 1;
1511 unsigned virtual_flag
: 1;
1512 unsigned ignored_flag
: 1;
1513 unsigned abstract_flag
: 1;
1514 unsigned artificial_flag
: 1;
1515 unsigned preserve_flag
: 1;
1516 unsigned debug_expr_is_from
: 1;
1518 unsigned lang_flag_0
: 1;
1519 unsigned lang_flag_1
: 1;
1520 unsigned lang_flag_2
: 1;
1521 unsigned lang_flag_3
: 1;
1522 unsigned lang_flag_4
: 1;
1523 unsigned lang_flag_5
: 1;
1524 unsigned lang_flag_6
: 1;
1525 unsigned lang_flag_7
: 1;
1526 unsigned lang_flag_8
: 1;
1528 /* In VAR_DECL and PARM_DECL, this is DECL_REGISTER. */
1529 unsigned decl_flag_0
: 1;
1530 /* In FIELD_DECL, this is DECL_BIT_FIELD
1531 In VAR_DECL and FUNCTION_DECL, this is DECL_EXTERNAL.
1532 In TYPE_DECL, this is TYPE_DECL_SUPPRESS_DEBUG. */
1533 unsigned decl_flag_1
: 1;
1534 /* In FIELD_DECL, this is DECL_NONADDRESSABLE_P
1535 In VAR_DECL, PARM_DECL and RESULT_DECL, this is
1536 DECL_HAS_VALUE_EXPR_P. */
1537 unsigned decl_flag_2
: 1;
1539 unsigned decl_flag_3
: 1;
1540 /* Logically, these two would go in a theoretical base shared by var and
1542 unsigned gimple_reg_flag
: 1;
1543 /* In VAR_DECL, PARM_DECL and RESULT_DECL, this is DECL_BY_REFERENCE. */
1544 unsigned decl_by_reference_flag
: 1;
1545 /* In a VAR_DECL and PARM_DECL, this is DECL_READ_P. */
1546 unsigned decl_read_flag
: 1;
1547 /* In a VAR_DECL or RESULT_DECL, this is DECL_NONSHAREABLE. */
1548 unsigned decl_nonshareable_flag
: 1;
1550 /* DECL_OFFSET_ALIGN, used only for FIELD_DECLs. */
1551 unsigned int off_align
: 6;
1553 /* DECL_ALIGN. It should have the same size as TYPE_ALIGN. */
1554 unsigned int align
: 6;
1556 /* 20 bits unused. */
1558 /* UID for points-to sets, stable over copying from inlining. */
1559 unsigned int pt_uid
;
1564 tree abstract_origin
;
1566 /* Points to a structure whose details depend on the language in use. */
1567 struct lang_decl
*lang_specific
;
1570 struct GTY(()) tree_decl_with_rtl
{
1571 struct tree_decl_common common
;
1575 struct GTY(()) tree_field_decl
{
1576 struct tree_decl_common common
;
1579 tree bit_field_type
;
1585 struct GTY(()) tree_label_decl
{
1586 struct tree_decl_with_rtl common
;
1588 int eh_landing_pad_nr
;
1591 struct GTY(()) tree_result_decl
{
1592 struct tree_decl_with_rtl common
;
1595 struct GTY(()) tree_const_decl
{
1596 struct tree_decl_common common
;
1599 struct GTY(()) tree_parm_decl
{
1600 struct tree_decl_with_rtl common
;
1604 struct GTY(()) tree_decl_with_vis
{
1605 struct tree_decl_with_rtl common
;
1606 tree assembler_name
;
1607 struct symtab_node
*symtab_node
;
1609 /* Belong to VAR_DECL exclusively. */
1610 unsigned defer_output
: 1;
1611 unsigned hard_register
: 1;
1612 unsigned common_flag
: 1;
1613 unsigned in_text_section
: 1;
1614 unsigned in_constant_pool
: 1;
1615 unsigned dllimport_flag
: 1;
1616 /* Don't belong to VAR_DECL exclusively. */
1617 unsigned weak_flag
: 1;
1619 unsigned seen_in_bind_expr
: 1;
1620 unsigned comdat_flag
: 1;
1621 /* Used for FUNCTION_DECL, VAR_DECL and in C++ for TYPE_DECL. */
1622 ENUM_BITFIELD(symbol_visibility
) visibility
: 2;
1623 unsigned visibility_specified
: 1;
1625 /* Belong to FUNCTION_DECL exclusively. */
1626 unsigned init_priority_p
: 1;
1627 /* Used by C++ only. Might become a generic decl flag. */
1628 unsigned shadowed_for_var_p
: 1;
1629 /* Belong to FUNCTION_DECL exclusively. */
1630 unsigned cxx_constructor
: 1;
1631 /* Belong to FUNCTION_DECL exclusively. */
1632 unsigned cxx_destructor
: 1;
1633 /* Belong to FUNCTION_DECL exclusively. */
1635 /* Belong to FUNCTION_DECL exclusively. */
1636 unsigned regdecl_flag
: 1;
1637 /* 14 unused bits. */
1640 struct GTY(()) tree_var_decl
{
1641 struct tree_decl_with_vis common
;
1644 struct GTY(()) tree_decl_non_common
{
1645 struct tree_decl_with_vis common
;
1646 /* Almost all FE's use this. */
1650 /* FUNCTION_DECL inherits from DECL_NON_COMMON because of the use of the
1651 arguments/result/saved_tree fields by front ends. It was either inherit
1652 FUNCTION_DECL from non_common, or inherit non_common from FUNCTION_DECL,
1653 which seemed a bit strange. */
1655 struct GTY(()) tree_function_decl
{
1656 struct tree_decl_non_common common
;
1660 /* Arguments of the function. */
1662 /* The personality function. Used for stack unwinding. */
1665 /* Function specific options that are used by this function. */
1666 tree function_specific_target
; /* target options */
1667 tree function_specific_optimization
; /* optimization options */
1669 /* Generic function body. */
1671 /* Index within a virtual table. */
1674 /* In a FUNCTION_DECL for which DECL_BUILT_IN holds, this is
1675 DECL_FUNCTION_CODE. Otherwise unused.
1676 ??? The bitfield needs to be able to hold all target function
1678 ENUM_BITFIELD(built_in_function
) function_code
: 12;
1679 ENUM_BITFIELD(built_in_class
) built_in_class
: 2;
1681 unsigned static_ctor_flag
: 1;
1682 unsigned static_dtor_flag
: 1;
1684 unsigned uninlinable
: 1;
1685 unsigned possibly_inlined
: 1;
1686 unsigned novops_flag
: 1;
1687 unsigned returns_twice_flag
: 1;
1688 unsigned malloc_flag
: 1;
1689 unsigned operator_new_flag
: 1;
1690 unsigned declared_inline_flag
: 1;
1691 unsigned no_inline_warning_flag
: 1;
1693 unsigned no_instrument_function_entry_exit
: 1;
1694 unsigned no_limit_stack
: 1;
1695 unsigned disregard_inline_limits
: 1;
1696 unsigned pure_flag
: 1;
1697 unsigned looping_const_or_pure_flag
: 1;
1698 unsigned has_debug_args_flag
: 1;
1699 unsigned tm_clone_flag
: 1;
1700 unsigned versioned_function
: 1;
1704 struct GTY(()) tree_translation_unit_decl
{
1705 struct tree_decl_common common
;
1706 /* Source language of this translation unit. Used for DWARF output. */
1707 const char * GTY((skip(""))) language
;
1708 /* TODO: Non-optimization used to build this translation unit. */
1709 /* TODO: Root of a partial DWARF tree for global types and decls. */
1712 struct GTY(()) tree_type_decl
{
1713 struct tree_decl_non_common common
;
1717 struct GTY ((chain_next ("%h.next"), chain_prev ("%h.prev"))) tree_statement_list_node
1719 struct tree_statement_list_node
*prev
;
1720 struct tree_statement_list_node
*next
;
1724 struct GTY(()) tree_statement_list
1726 struct tree_typed typed
;
1727 struct tree_statement_list_node
*head
;
1728 struct tree_statement_list_node
*tail
;
1732 /* Optimization options used by a function. */
1734 struct GTY(()) tree_optimization_option
{
1735 struct tree_common common
;
1737 /* The optimization options used by the user. */
1738 struct cl_optimization
*opts
;
1740 /* Target optabs for this set of optimization options. This is of
1741 type `struct target_optabs *'. */
1742 void *GTY ((atomic
)) optabs
;
1744 /* The value of this_target_optabs against which the optabs above were
1746 struct target_optabs
*GTY ((skip
)) base_optabs
;
1749 /* Forward declaration, defined in target-globals.h. */
1751 struct GTY(()) target_globals
;
1753 /* Target options used by a function. */
1755 struct GTY(()) tree_target_option
{
1756 struct tree_common common
;
1758 /* Target globals for the corresponding target option. */
1759 struct target_globals
*globals
;
1761 /* The optimization options used by the user. */
1762 struct cl_target_option
*opts
;
1765 /* Define the overall contents of a tree node.
1766 It may be any of the structures declared above
1767 for various types of node. */
1768 union GTY ((ptr_alias (union lang_tree_node
),
1769 desc ("tree_node_structure (&%h)"), variable_size
)) tree_node
{
1770 struct tree_base
GTY ((tag ("TS_BASE"))) base
;
1771 struct tree_typed
GTY ((tag ("TS_TYPED"))) typed
;
1772 struct tree_common
GTY ((tag ("TS_COMMON"))) common
;
1773 struct tree_int_cst
GTY ((tag ("TS_INT_CST"))) int_cst
;
1774 struct tree_real_cst
GTY ((tag ("TS_REAL_CST"))) real_cst
;
1775 struct tree_fixed_cst
GTY ((tag ("TS_FIXED_CST"))) fixed_cst
;
1776 struct tree_vector
GTY ((tag ("TS_VECTOR"))) vector
;
1777 struct tree_string
GTY ((tag ("TS_STRING"))) string
;
1778 struct tree_complex
GTY ((tag ("TS_COMPLEX"))) complex;
1779 struct tree_identifier
GTY ((tag ("TS_IDENTIFIER"))) identifier
;
1780 struct tree_decl_minimal
GTY((tag ("TS_DECL_MINIMAL"))) decl_minimal
;
1781 struct tree_decl_common
GTY ((tag ("TS_DECL_COMMON"))) decl_common
;
1782 struct tree_decl_with_rtl
GTY ((tag ("TS_DECL_WRTL"))) decl_with_rtl
;
1783 struct tree_decl_non_common
GTY ((tag ("TS_DECL_NON_COMMON")))
1785 struct tree_parm_decl
GTY ((tag ("TS_PARM_DECL"))) parm_decl
;
1786 struct tree_decl_with_vis
GTY ((tag ("TS_DECL_WITH_VIS"))) decl_with_vis
;
1787 struct tree_var_decl
GTY ((tag ("TS_VAR_DECL"))) var_decl
;
1788 struct tree_field_decl
GTY ((tag ("TS_FIELD_DECL"))) field_decl
;
1789 struct tree_label_decl
GTY ((tag ("TS_LABEL_DECL"))) label_decl
;
1790 struct tree_result_decl
GTY ((tag ("TS_RESULT_DECL"))) result_decl
;
1791 struct tree_const_decl
GTY ((tag ("TS_CONST_DECL"))) const_decl
;
1792 struct tree_type_decl
GTY ((tag ("TS_TYPE_DECL"))) type_decl
;
1793 struct tree_function_decl
GTY ((tag ("TS_FUNCTION_DECL"))) function_decl
;
1794 struct tree_translation_unit_decl
GTY ((tag ("TS_TRANSLATION_UNIT_DECL")))
1795 translation_unit_decl
;
1796 struct tree_type_common
GTY ((tag ("TS_TYPE_COMMON"))) type_common
;
1797 struct tree_type_with_lang_specific
GTY ((tag ("TS_TYPE_WITH_LANG_SPECIFIC")))
1798 type_with_lang_specific
;
1799 struct tree_type_non_common
GTY ((tag ("TS_TYPE_NON_COMMON")))
1801 struct tree_list
GTY ((tag ("TS_LIST"))) list
;
1802 struct tree_vec
GTY ((tag ("TS_VEC"))) vec
;
1803 struct tree_exp
GTY ((tag ("TS_EXP"))) exp
;
1804 struct tree_ssa_name
GTY ((tag ("TS_SSA_NAME"))) ssa_name
;
1805 struct tree_block
GTY ((tag ("TS_BLOCK"))) block
;
1806 struct tree_binfo
GTY ((tag ("TS_BINFO"))) binfo
;
1807 struct tree_statement_list
GTY ((tag ("TS_STATEMENT_LIST"))) stmt_list
;
1808 struct tree_constructor
GTY ((tag ("TS_CONSTRUCTOR"))) constructor
;
1809 struct tree_omp_clause
GTY ((tag ("TS_OMP_CLAUSE"))) omp_clause
;
1810 struct tree_optimization_option
GTY ((tag ("TS_OPTIMIZATION"))) optimization
;
1811 struct tree_target_option
GTY ((tag ("TS_TARGET_OPTION"))) target_option
;
1814 /* Structure describing an attribute and a function to handle it. */
1815 struct attribute_spec
{
1816 /* The name of the attribute (without any leading or trailing __),
1817 or NULL to mark the end of a table of attributes. */
1819 /* The minimum length of the list of arguments of the attribute. */
1821 /* The maximum length of the list of arguments of the attribute
1822 (-1 for no maximum). */
1824 /* Whether this attribute requires a DECL. If it does, it will be passed
1825 from types of DECLs, function return types and array element types to
1826 the DECLs, function types and array types respectively; but when
1827 applied to a type in any other circumstances, it will be ignored with
1828 a warning. (If greater control is desired for a given attribute,
1829 this should be false, and the flags argument to the handler may be
1830 used to gain greater control in that case.) */
1832 /* Whether this attribute requires a type. If it does, it will be passed
1833 from a DECL to the type of that DECL. */
1835 /* Whether this attribute requires a function (or method) type. If it does,
1836 it will be passed from a function pointer type to the target type,
1837 and from a function return type (which is not itself a function
1838 pointer type) to the function type. */
1839 bool function_type_required
;
1840 /* Function to handle this attribute. NODE points to the node to which
1841 the attribute is to be applied. If a DECL, it should be modified in
1842 place; if a TYPE, a copy should be created. NAME is the name of the
1843 attribute (possibly with leading or trailing __). ARGS is the TREE_LIST
1844 of the arguments (which may be NULL). FLAGS gives further information
1845 about the context of the attribute. Afterwards, the attributes will
1846 be added to the DECL_ATTRIBUTES or TYPE_ATTRIBUTES, as appropriate,
1847 unless *NO_ADD_ATTRS is set to true (which should be done on error,
1848 as well as in any other cases when the attributes should not be added
1849 to the DECL or TYPE). Depending on FLAGS, any attributes to be
1850 applied to another type or DECL later may be returned;
1851 otherwise the return value should be NULL_TREE. This pointer may be
1852 NULL if no special handling is required beyond the checks implied
1853 by the rest of this structure. */
1854 tree (*handler
) (tree
*node
, tree name
, tree args
,
1855 int flags
, bool *no_add_attrs
);
1856 /* Specifies if attribute affects type's identity. */
1857 bool affects_type_identity
;
1860 /* These functions allow a front-end to perform a manual layout of a
1861 RECORD_TYPE. (For instance, if the placement of subsequent fields
1862 depends on the placement of fields so far.) Begin by calling
1863 start_record_layout. Then, call place_field for each of the
1864 fields. Then, call finish_record_layout. See layout_type for the
1865 default way in which these functions are used. */
1866 typedef struct record_layout_info_s
{
1867 /* The RECORD_TYPE that we are laying out. */
1869 /* The offset into the record so far, in bytes, not including bits in
1872 /* The last known alignment of SIZE. */
1873 unsigned int offset_align
;
1874 /* The bit position within the last OFFSET_ALIGN bits, in bits. */
1876 /* The alignment of the record so far, in bits. */
1877 unsigned int record_align
;
1878 /* The alignment of the record so far, ignoring #pragma pack and
1879 __attribute__ ((packed)), in bits. */
1880 unsigned int unpacked_align
;
1881 /* The previous field laid out. */
1883 /* The static variables (i.e., class variables, as opposed to
1884 instance variables) encountered in T. */
1885 vec
<tree
, va_gc
> *pending_statics
;
1886 /* Bits remaining in the current alignment group */
1887 int remaining_in_alignment
;
1888 /* True if we've seen a packed field that didn't have normal
1889 alignment anyway. */
1890 int packed_maybe_necessary
;
1891 } *record_layout_info
;
1893 /* Iterator for going through the function arguments. */
1894 struct function_args_iterator
{
1895 tree next
; /* TREE_LIST pointing to the next argument */
1898 /* Structures to map from a tree to another tree. */
1899 struct GTY(()) tree_map_base
{
1903 /* Map from a tree to another tree. */
1905 struct GTY((for_user
)) tree_map
{
1906 struct tree_map_base base
;
1911 /* Map from a decl tree to another tree. */
1912 struct GTY((for_user
)) tree_decl_map
{
1913 struct tree_map_base base
;
1917 /* Map from a tree to an int. */
1918 struct GTY((for_user
)) tree_int_map
{
1919 struct tree_map_base base
;
1923 /* Map from a decl tree to a tree vector. */
1924 struct GTY((for_user
)) tree_vec_map
{
1925 struct tree_map_base base
;
1926 vec
<tree
, va_gc
> *to
;
1929 /* Abstract iterators for CALL_EXPRs. These static inline definitions
1930 have to go towards the end of tree.h so that union tree_node is fully
1931 defined by this point. */
1933 /* Structure containing iterator state. */
1934 struct call_expr_arg_iterator
{
1935 tree t
; /* the call_expr */
1936 int n
; /* argument count */
1937 int i
; /* next argument index */
1940 struct const_call_expr_arg_iterator
{
1941 const_tree t
; /* the call_expr */
1942 int n
; /* argument count */
1943 int i
; /* next argument index */
1946 /* The builtin_info structure holds the FUNCTION_DECL of the standard builtin
1947 function, and flags. */
1948 struct GTY(()) builtin_info_type
{
1950 /* Whether the user can use <xxx> instead of explicitly using calls
1951 to __builtin_<xxx>. */
1952 unsigned implicit_p
: 1;
1953 /* Whether the user has provided a declaration of <xxx>. */
1954 unsigned declared_p
: 1;
1958 /*---------------------------------------------------------------------------
1960 ---------------------------------------------------------------------------*/
1961 /* Matrix describing the structures contained in a given tree code. */
1962 extern unsigned char tree_contains_struct
[MAX_TREE_CODES
][64];
1964 /* Class of tree given its code. */
1965 extern const enum tree_code_class tree_code_type
[];
1967 /* Each tree code class has an associated string representation.
1968 These must correspond to the tree_code_class entries. */
1969 extern const char *const tree_code_class_strings
[];
1971 /* Number of argument-words in each kind of tree-node. */
1972 extern const unsigned char tree_code_length
[];
1974 /* Vector of all alias pairs for global symbols. */
1975 extern GTY(()) vec
<alias_pair
, va_gc
> *alias_pairs
;
1977 /* Names of all the built_in classes. */
1978 extern const char *const built_in_class_names
[BUILT_IN_LAST
];
1980 /* Names of all the built_in functions. */
1981 extern const char * built_in_names
[(int) END_BUILTINS
];
1983 /* Number of operands and names for each OMP_CLAUSE node. */
1984 extern unsigned const char omp_clause_num_ops
[];
1985 extern const char * const omp_clause_code_name
[];
1987 /* A vector of all translation-units. */
1988 extern GTY (()) vec
<tree
, va_gc
> *all_translation_units
;
1990 /* Vector of standard trees used by the C compiler. */
1991 extern GTY(()) tree global_trees
[TI_MAX
];
1993 /* The standard C integer types. Use integer_type_kind to index into
1995 extern GTY(()) tree integer_types
[itk_none
];
1997 /* Types used to represent sizes. */
1998 extern GTY(()) tree sizetype_tab
[(int) stk_type_kind_last
];
2000 /* Arrays for keeping track of tree node statistics. */
2001 extern int tree_node_counts
[];
2002 extern int tree_node_sizes
[];
2004 /* True if we are in gimple form and the actions of the folders need to
2005 be restricted. False if we are not in gimple form and folding is not
2006 restricted to creating gimple expressions. */
2007 extern bool in_gimple_form
;
2009 /* Functional interface to the builtin functions. */
2010 extern GTY(()) builtin_info_type builtin_info
[(int)END_BUILTINS
];
2012 /* If nonzero, an upper limit on alignment of structure fields, in bits, */
2013 extern unsigned int maximum_field_alignment
;
2015 /* Points to the FUNCTION_DECL of the function whose body we are reading. */
2016 extern GTY(()) tree current_function_decl
;
2018 /* Nonzero means a FUNC_BEGIN label was emitted. */
2019 extern GTY(()) const char * current_function_func_begin_label
;
2021 #endif // GCC_TREE_CORE_H