1 /* Core data structures for the 'tree' type.
2 Copyright (C) 1989-2019 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 returns its first argument. */
85 #define ECF_RET1 (1 << 11)
87 /* Nonzero if this call does not affect transactions. */
88 #define ECF_TM_PURE (1 << 12)
90 /* Nonzero if this call is into the transaction runtime library. */
91 #define ECF_TM_BUILTIN (1 << 13)
93 /* Nonzero if this is an indirect call by descriptor. */
94 #define ECF_BY_DESCRIPTOR (1 << 14)
96 /* Nonzero if this is a cold function. */
97 #define ECF_COLD (1 << 15)
99 /* Call argument flags. */
100 /* Nonzero if the argument is not dereferenced recursively, thus only
101 directly reachable memory is read or written. */
102 #define EAF_DIRECT (1 << 0)
104 /* Nonzero if memory reached by the argument is not clobbered. */
105 #define EAF_NOCLOBBER (1 << 1)
107 /* Nonzero if the argument does not escape. */
108 #define EAF_NOESCAPE (1 << 2)
110 /* Nonzero if the argument is not used by the function. */
111 #define EAF_UNUSED (1 << 3)
113 /* Call return flags. */
114 /* Mask for the argument number that is returned. Lower two bits of
115 the return flags, encodes argument slots zero to three. */
116 #define ERF_RETURN_ARG_MASK (3)
118 /* Nonzero if the return value is equal to the argument number
119 flags & ERF_RETURN_ARG_MASK. */
120 #define ERF_RETURNS_ARG (1 << 2)
122 /* Nonzero if the return value does not alias with anything. Functions
123 with the malloc attribute have this set on their return value. */
124 #define ERF_NOALIAS (1 << 3)
127 /*---------------------------------------------------------------------------
129 ---------------------------------------------------------------------------*/
130 /* Codes of tree nodes. */
131 #define DEFTREECODE(SYM, STRING, TYPE, NARGS) SYM,
132 #define END_OF_BASE_TREE_CODES LAST_AND_UNUSED_TREE_CODE,
135 #include "all-tree.def"
140 #undef END_OF_BASE_TREE_CODES
142 /* Number of language-independent tree codes. */
143 #define NUM_TREE_CODES \
144 ((int) LAST_AND_UNUSED_TREE_CODE)
146 #define CODE_CONTAINS_STRUCT(CODE, STRUCT) \
147 (tree_contains_struct[(CODE)][(STRUCT)])
150 /* Classify which part of the compiler has defined a given builtin function.
151 Note that we assume below that this is no more than two bits. */
152 enum built_in_class
{
159 /* Last marker used for LTO stremaing of built_in_class. We cannot add it
160 to the enum since we need the enumb to fit in 2 bits. */
161 #define BUILT_IN_LAST (BUILT_IN_NORMAL + 1)
163 /* Codes that identify the various built in functions
164 so that expand_call can identify them quickly. */
165 #define DEF_BUILTIN(ENUM, N, C, T, LT, B, F, NA, AT, IM, COND) ENUM,
166 enum built_in_function
{
167 #include "builtins.def"
168 /* Complex division routines in libgcc. These are done via builtins
169 because emit_library_call_value can't handle complex values. */
170 BUILT_IN_COMPLEX_MUL_MIN
,
171 BUILT_IN_COMPLEX_MUL_MAX
172 = BUILT_IN_COMPLEX_MUL_MIN
173 + MAX_MODE_COMPLEX_FLOAT
174 - MIN_MODE_COMPLEX_FLOAT
,
176 BUILT_IN_COMPLEX_DIV_MIN
,
177 BUILT_IN_COMPLEX_DIV_MAX
178 = BUILT_IN_COMPLEX_DIV_MIN
179 + MAX_MODE_COMPLEX_FLOAT
180 - MIN_MODE_COMPLEX_FLOAT
,
182 /* Upper bound on non-language-specific builtins. */
186 /* Internal functions. */
188 #define DEF_INTERNAL_FN(CODE, FLAGS, FNSPEC) IFN_##CODE,
189 #include "internal-fn.def"
193 /* An enum that combines target-independent built-in functions with
194 internal functions, so that they can be treated in a similar way.
195 The numbers for built-in functions are the same as for the
196 built_in_function enum. The numbers for internal functions
197 start at END_BUITLINS. */
199 #define DEF_BUILTIN(ENUM, N, C, T, LT, B, F, NA, AT, IM, COND) \
200 CFN_##ENUM = int (ENUM),
201 #include "builtins.def"
204 #define DEF_INTERNAL_FN(CODE, FLAGS, FNSPEC) \
205 CFN_##CODE = int (END_BUILTINS) + int (IFN_##CODE),
206 #include "internal-fn.def"
211 /* Tree code classes. Each tree_code has an associated code class
212 represented by a TREE_CODE_CLASS. */
213 enum tree_code_class
{
214 tcc_exceptional
, /* An exceptional code (fits no category). */
215 tcc_constant
, /* A constant. */
216 /* Order of tcc_type and tcc_declaration is important. */
217 tcc_type
, /* A type object code. */
218 tcc_declaration
, /* A declaration (also serving as variable refs). */
219 tcc_reference
, /* A reference to storage. */
220 tcc_comparison
, /* A comparison expression. */
221 tcc_unary
, /* A unary arithmetic expression. */
222 tcc_binary
, /* A binary arithmetic expression. */
223 tcc_statement
, /* A statement expression, which have side effects
224 but usually no interesting value. */
225 tcc_vl_exp
, /* A function call or other expression with a
226 variable-length operand vector. */
227 tcc_expression
/* Any other expression. */
230 /* OMP_CLAUSE codes. Do not reorder, as this is used to index into
231 the tables omp_clause_num_ops and omp_clause_code_name. */
232 enum omp_clause_code
{
233 /* Clause zero is special-cased inside the parser
234 (c_parser_omp_variable_list). */
235 OMP_CLAUSE_ERROR
= 0,
237 /* OpenACC/OpenMP clause: private (variable_list). */
240 /* OpenMP clause: shared (variable_list). */
243 /* OpenACC/OpenMP clause: firstprivate (variable_list). */
244 OMP_CLAUSE_FIRSTPRIVATE
,
246 /* OpenMP clause: lastprivate (variable_list). */
247 OMP_CLAUSE_LASTPRIVATE
,
249 /* OpenACC/OpenMP clause: reduction (operator:variable_list).
250 OMP_CLAUSE_REDUCTION_CODE: The tree_code of the operator.
251 Operand 1: OMP_CLAUSE_REDUCTION_INIT: Stmt-list to initialize the var.
252 Operand 2: OMP_CLAUSE_REDUCTION_MERGE: Stmt-list to merge private var
254 Operand 3: OMP_CLAUSE_REDUCTION_PLACEHOLDER: A dummy VAR_DECL
255 placeholder used in OMP_CLAUSE_REDUCTION_{INIT,MERGE}.
256 Operand 4: OMP_CLAUSE_REDUCTION_DECL_PLACEHOLDER: Another dummy
257 VAR_DECL placeholder, used like the above for C/C++ array
259 OMP_CLAUSE_REDUCTION
,
261 /* OpenMP clause: task_reduction (operator:variable_list). */
262 OMP_CLAUSE_TASK_REDUCTION
,
264 /* OpenMP clause: in_reduction (operator:variable_list). */
265 OMP_CLAUSE_IN_REDUCTION
,
267 /* OpenMP clause: copyin (variable_list). */
270 /* OpenMP clause: copyprivate (variable_list). */
271 OMP_CLAUSE_COPYPRIVATE
,
273 /* OpenMP clause: linear (variable-list[:linear-step]). */
276 /* OpenMP clause: aligned (variable-list[:alignment]). */
279 /* OpenMP clause: depend ({in,out,inout}:variable-list). */
282 /* OpenMP clause: nontemporal (variable-list). */
283 OMP_CLAUSE_NONTEMPORAL
,
285 /* OpenMP clause: uniform (argument-list). */
288 /* OpenMP clause: to (extended-list).
289 Only when it appears in declare target. */
290 OMP_CLAUSE_TO_DECLARE
,
292 /* OpenMP clause: link (variable-list). */
295 /* OpenMP clause: from (variable-list). */
298 /* OpenMP clause: to (variable-list). */
301 /* OpenACC clauses: {copy, copyin, copyout, create, delete, deviceptr,
302 device, host (self), present, present_or_copy (pcopy), present_or_copyin
303 (pcopyin), present_or_copyout (pcopyout), present_or_create (pcreate)}
306 OpenMP clause: map ({alloc:,to:,from:,tofrom:,}variable-list). */
309 /* OpenACC clause: use_device (variable-list).
310 OpenMP clause: use_device_ptr (variable-list). */
311 OMP_CLAUSE_USE_DEVICE_PTR
,
313 /* OpenMP clause: is_device_ptr (variable-list). */
314 OMP_CLAUSE_IS_DEVICE_PTR
,
316 /* OpenMP clause: inclusive (variable-list). */
317 OMP_CLAUSE_INCLUSIVE
,
319 /* OpenMP clause: exclusive (variable-list). */
320 OMP_CLAUSE_EXCLUSIVE
,
322 /* Internal structure to hold OpenACC cache directive's variable-list.
323 #pragma acc cache (variable-list). */
326 /* OpenACC clause: gang [(gang-argument-list)].
328 gang-argument-list: [gang-argument-list, ] gang-argument
329 gang-argument: [num:] integer-expression
330 | static: size-expression
331 size-expression: * | integer-expression. */
334 /* OpenACC clause: async [(integer-expression)]. */
337 /* OpenACC clause: wait [(integer-expression-list)]. */
340 /* OpenACC clause: auto. */
343 /* OpenACC clause: seq. */
346 /* Internal clause: temporary for combined loops expansion. */
347 OMP_CLAUSE__LOOPTEMP_
,
349 /* Internal clause: temporary for task reductions. */
350 OMP_CLAUSE__REDUCTEMP_
,
352 /* Internal clause: temporary for lastprivate(conditional:). */
353 OMP_CLAUSE__CONDTEMP_
,
355 /* Internal clause: temporary for inscan reductions. */
356 OMP_CLAUSE__SCANTEMP_
,
358 /* OpenACC/OpenMP clause: if (scalar-expression). */
361 /* OpenMP clause: num_threads (integer-expression). */
362 OMP_CLAUSE_NUM_THREADS
,
364 /* OpenMP clause: schedule. */
367 /* OpenMP clause: nowait. */
370 /* OpenMP clause: ordered [(constant-integer-expression)]. */
373 /* OpenACC/OpenMP clause: default. */
376 /* OpenACC/OpenMP clause: collapse (constant-integer-expression). */
379 /* OpenMP clause: untied. */
382 /* OpenMP clause: final (scalar-expression). */
385 /* OpenMP clause: mergeable. */
386 OMP_CLAUSE_MERGEABLE
,
388 /* OpenMP clause: device (integer-expression). */
391 /* OpenMP clause: dist_schedule (static[:chunk-size]). */
392 OMP_CLAUSE_DIST_SCHEDULE
,
394 /* OpenMP clause: inbranch. */
397 /* OpenMP clause: notinbranch. */
398 OMP_CLAUSE_NOTINBRANCH
,
400 /* OpenMP clause: num_teams(integer-expression). */
401 OMP_CLAUSE_NUM_TEAMS
,
403 /* OpenMP clause: thread_limit(integer-expression). */
404 OMP_CLAUSE_THREAD_LIMIT
,
406 /* OpenMP clause: proc_bind ({master,close,spread}). */
407 OMP_CLAUSE_PROC_BIND
,
409 /* OpenMP clause: safelen (constant-integer-expression). */
412 /* OpenMP clause: simdlen (constant-integer-expression). */
415 /* OpenMP clause: for. */
418 /* OpenMP clause: parallel. */
421 /* OpenMP clause: sections. */
424 /* OpenMP clause: taskgroup. */
425 OMP_CLAUSE_TASKGROUP
,
427 /* OpenMP clause: priority (integer-expression). */
430 /* OpenMP clause: grainsize (integer-expression). */
431 OMP_CLAUSE_GRAINSIZE
,
433 /* OpenMP clause: num_tasks (integer-expression). */
434 OMP_CLAUSE_NUM_TASKS
,
436 /* OpenMP clause: nogroup. */
439 /* OpenMP clause: threads. */
442 /* OpenMP clause: simd. */
445 /* OpenMP clause: hint (integer-expression). */
448 /* OpenMP clause: defaultmap (tofrom: scalar). */
449 OMP_CLAUSE_DEFAULTMAP
,
451 /* OpenMP clause: order (concurrent). */
454 /* OpenMP clause: bind (binding). */
457 /* Internally used only clause, holding SIMD uid. */
458 OMP_CLAUSE__SIMDUID_
,
460 /* Internally used only clause, flag whether this is SIMT simd
464 /* OpenACC clause: independent. */
465 OMP_CLAUSE_INDEPENDENT
,
467 /* OpenACC clause: worker [( [num:] integer-expression)]. */
470 /* OpenACC clause: vector [( [length:] integer-expression)]. */
473 /* OpenACC clause: num_gangs (integer-expression). */
474 OMP_CLAUSE_NUM_GANGS
,
476 /* OpenACC clause: num_workers (integer-expression). */
477 OMP_CLAUSE_NUM_WORKERS
,
479 /* OpenACC clause: vector_length (integer-expression). */
480 OMP_CLAUSE_VECTOR_LENGTH
,
482 /* OpenACC clause: tile ( size-expr-list ). */
485 /* OpenMP internal-only clause to specify grid dimensions of a gridified
487 OMP_CLAUSE__GRIDDIM_
,
489 /* OpenACC clause: if_present. */
490 OMP_CLAUSE_IF_PRESENT
,
492 /* OpenACC clause: finalize. */
497 #define DEFTREESTRUCT(ENUM, NAME) ENUM,
498 enum tree_node_structure_enum
{
499 #include "treestruct.def"
504 enum omp_clause_schedule_kind
{
505 OMP_CLAUSE_SCHEDULE_STATIC
,
506 OMP_CLAUSE_SCHEDULE_DYNAMIC
,
507 OMP_CLAUSE_SCHEDULE_GUIDED
,
508 OMP_CLAUSE_SCHEDULE_AUTO
,
509 OMP_CLAUSE_SCHEDULE_RUNTIME
,
510 OMP_CLAUSE_SCHEDULE_MASK
= (1 << 3) - 1,
511 OMP_CLAUSE_SCHEDULE_MONOTONIC
= (1 << 3),
512 OMP_CLAUSE_SCHEDULE_NONMONOTONIC
= (1 << 4),
513 OMP_CLAUSE_SCHEDULE_LAST
= 2 * OMP_CLAUSE_SCHEDULE_NONMONOTONIC
- 1
516 enum omp_clause_default_kind
{
517 OMP_CLAUSE_DEFAULT_UNSPECIFIED
,
518 OMP_CLAUSE_DEFAULT_SHARED
,
519 OMP_CLAUSE_DEFAULT_NONE
,
520 OMP_CLAUSE_DEFAULT_PRIVATE
,
521 OMP_CLAUSE_DEFAULT_FIRSTPRIVATE
,
522 OMP_CLAUSE_DEFAULT_PRESENT
,
523 OMP_CLAUSE_DEFAULT_LAST
526 enum omp_clause_defaultmap_kind
{
527 OMP_CLAUSE_DEFAULTMAP_CATEGORY_UNSPECIFIED
,
528 OMP_CLAUSE_DEFAULTMAP_CATEGORY_SCALAR
,
529 OMP_CLAUSE_DEFAULTMAP_CATEGORY_AGGREGATE
,
530 OMP_CLAUSE_DEFAULTMAP_CATEGORY_ALLOCATABLE
,
531 OMP_CLAUSE_DEFAULTMAP_CATEGORY_POINTER
,
532 OMP_CLAUSE_DEFAULTMAP_CATEGORY_MASK
= 7,
533 OMP_CLAUSE_DEFAULTMAP_ALLOC
= 1 * (OMP_CLAUSE_DEFAULTMAP_CATEGORY_MASK
+ 1),
534 OMP_CLAUSE_DEFAULTMAP_TO
= 2 * (OMP_CLAUSE_DEFAULTMAP_CATEGORY_MASK
+ 1),
535 OMP_CLAUSE_DEFAULTMAP_FROM
= 3 * (OMP_CLAUSE_DEFAULTMAP_CATEGORY_MASK
+ 1),
536 OMP_CLAUSE_DEFAULTMAP_TOFROM
= 4 * (OMP_CLAUSE_DEFAULTMAP_CATEGORY_MASK
+ 1),
537 OMP_CLAUSE_DEFAULTMAP_FIRSTPRIVATE
538 = 5 * (OMP_CLAUSE_DEFAULTMAP_CATEGORY_MASK
+ 1),
539 OMP_CLAUSE_DEFAULTMAP_NONE
= 6 * (OMP_CLAUSE_DEFAULTMAP_CATEGORY_MASK
+ 1),
540 OMP_CLAUSE_DEFAULTMAP_DEFAULT
541 = 7 * (OMP_CLAUSE_DEFAULTMAP_CATEGORY_MASK
+ 1),
542 OMP_CLAUSE_DEFAULTMAP_MASK
= 7 * (OMP_CLAUSE_DEFAULTMAP_CATEGORY_MASK
+ 1)
545 enum omp_clause_bind_kind
{
546 OMP_CLAUSE_BIND_TEAMS
,
547 OMP_CLAUSE_BIND_PARALLEL
,
548 OMP_CLAUSE_BIND_THREAD
551 /* memory-order-clause on OpenMP atomic/flush constructs or
552 argument of atomic_default_mem_order clause. */
553 enum omp_memory_order
{
554 OMP_MEMORY_ORDER_UNSPECIFIED
,
555 OMP_MEMORY_ORDER_RELAXED
,
556 OMP_MEMORY_ORDER_ACQUIRE
,
557 OMP_MEMORY_ORDER_RELEASE
,
558 OMP_MEMORY_ORDER_ACQ_REL
,
559 OMP_MEMORY_ORDER_SEQ_CST
562 /* There is a TYPE_QUAL value for each type qualifier. They can be
563 combined by bitwise-or to form the complete set of qualifiers for a
566 TYPE_UNQUALIFIED
= 0x0,
567 TYPE_QUAL_CONST
= 0x1,
568 TYPE_QUAL_VOLATILE
= 0x2,
569 TYPE_QUAL_RESTRICT
= 0x4,
570 TYPE_QUAL_ATOMIC
= 0x8
573 /* Standard named or nameless data types of the C compiler. */
603 TI_INTEGER_MINUS_ONE
,
624 /* The _FloatN and _FloatNx types must be consecutive, and in the
625 same sequence as the corresponding complex types, which must also
626 be consecutive; _FloatN must come before _FloatNx; the order must
627 also be the same as in the floatn_nx_types array and the RID_*
628 values in c-common.h. This is so that iterations over these
629 types work as intended. */
631 TI_FLOATN_TYPE_FIRST
= TI_FLOAT16_TYPE
,
632 TI_FLOATN_NX_TYPE_FIRST
= TI_FLOAT16_TYPE
,
636 TI_FLOATN_TYPE_LAST
= TI_FLOAT128_TYPE
,
637 #define NUM_FLOATN_TYPES (TI_FLOATN_TYPE_LAST - TI_FLOATN_TYPE_FIRST + 1)
639 TI_FLOATNX_TYPE_FIRST
= TI_FLOAT32X_TYPE
,
642 TI_FLOATNX_TYPE_LAST
= TI_FLOAT128X_TYPE
,
643 TI_FLOATN_NX_TYPE_LAST
= TI_FLOAT128X_TYPE
,
644 #define NUM_FLOATNX_TYPES (TI_FLOATNX_TYPE_LAST - TI_FLOATNX_TYPE_FIRST + 1)
645 #define NUM_FLOATN_NX_TYPES (TI_FLOATN_NX_TYPE_LAST \
646 - TI_FLOATN_NX_TYPE_FIRST \
649 /* Put the complex types after their component types, so that in (sequential)
650 tree streaming we can assert that their component types have already been
651 handled (see tree-streamer.c:record_common_node). */
652 TI_COMPLEX_INTEGER_TYPE
,
653 TI_COMPLEX_FLOAT_TYPE
,
654 TI_COMPLEX_DOUBLE_TYPE
,
655 TI_COMPLEX_LONG_DOUBLE_TYPE
,
657 TI_COMPLEX_FLOAT16_TYPE
,
658 TI_COMPLEX_FLOATN_NX_TYPE_FIRST
= TI_COMPLEX_FLOAT16_TYPE
,
659 TI_COMPLEX_FLOAT32_TYPE
,
660 TI_COMPLEX_FLOAT64_TYPE
,
661 TI_COMPLEX_FLOAT128_TYPE
,
662 TI_COMPLEX_FLOAT32X_TYPE
,
663 TI_COMPLEX_FLOAT64X_TYPE
,
664 TI_COMPLEX_FLOAT128X_TYPE
,
668 TI_LONG_DOUBLE_PTR_TYPE
,
678 TI_VA_LIST_GPR_COUNTER_FIELD
,
679 TI_VA_LIST_FPR_COUNTER_FIELD
,
682 TI_CONST_TM_PTR_TYPE
,
684 TI_CONST_FENV_T_PTR_TYPE
,
685 TI_FEXCEPT_T_PTR_TYPE
,
686 TI_CONST_FEXCEPT_T_PTR_TYPE
,
687 TI_POINTER_SIZED_TYPE
,
692 TI_DFLOAT32_PTR_TYPE
,
693 TI_DFLOAT64_PTR_TYPE
,
694 TI_DFLOAT128_PTR_TYPE
,
707 TI_SAT_ULLFRACT_TYPE
,
723 TI_SAT_ULLACCUM_TYPE
,
769 TI_OPTIMIZATION_DEFAULT
,
770 TI_OPTIMIZATION_CURRENT
,
771 TI_TARGET_OPTION_DEFAULT
,
772 TI_TARGET_OPTION_CURRENT
,
773 TI_CURRENT_TARGET_PRAGMA
,
774 TI_CURRENT_OPTIMIZE_PRAGMA
,
782 /* An enumeration of the standard C integer types. These must be
783 ordered so that shorter types appear before longer ones, and so
784 that signed types appear before unsigned ones, for the correct
785 functioning of interpret_integer() in c-lex.c. */
786 enum integer_type_kind
{
797 itk_unsigned_long_long
,
811 /* A pointer-to-function member type looks like:
818 If __pfn is NULL, it is a NULL pointer-to-member-function.
820 (Because the vtable is always the first thing in the object, we
821 don't need its offset.) If the function is virtual, then PFN is
822 one plus twice the index into the vtable; otherwise, it is just a
823 pointer to the function.
825 Unfortunately, using the lowest bit of PFN doesn't work in
826 architectures that don't impose alignment requirements on function
827 addresses, or that use the lowest bit to tell one ISA from another,
828 for example. For such architectures, we use the lowest bit of
829 DELTA instead of the lowest bit of the PFN, and DELTA will be
831 enum ptrmemfunc_vbit_where_t
{
832 ptrmemfunc_vbit_in_pfn
,
833 ptrmemfunc_vbit_in_delta
836 /* Flags that may be passed in the third argument of decl_attributes, and
837 to handler functions for attributes. */
838 enum attribute_flags
{
839 /* The type passed in is the type of a DECL, and any attributes that
840 should be passed in again to be applied to the DECL rather than the
841 type should be returned. */
842 ATTR_FLAG_DECL_NEXT
= 1,
843 /* The type passed in is a function return type, and any attributes that
844 should be passed in again to be applied to the function type rather
845 than the return type should be returned. */
846 ATTR_FLAG_FUNCTION_NEXT
= 2,
847 /* The type passed in is an array element type, and any attributes that
848 should be passed in again to be applied to the array type rather
849 than the element type should be returned. */
850 ATTR_FLAG_ARRAY_NEXT
= 4,
851 /* The type passed in is a structure, union or enumeration type being
852 created, and should be modified in place. */
853 ATTR_FLAG_TYPE_IN_PLACE
= 8,
854 /* The attributes are being applied by default to a library function whose
855 name indicates known behavior, and should be silently ignored if they
856 are not in fact compatible with the function type. */
857 ATTR_FLAG_BUILT_IN
= 16,
858 /* A given attribute has been parsed as a C++-11 attribute. */
862 /* Types used to represent sizes. */
863 enum size_type_kind
{
864 stk_sizetype
, /* Normal representation of sizes in bytes. */
865 stk_ssizetype
, /* Signed representation of sizes in bytes. */
866 stk_bitsizetype
, /* Normal representation of sizes in bits. */
867 stk_sbitsizetype
, /* Signed representation of sizes in bits. */
871 enum operand_equal_flag
{
874 OEP_MATCH_SIDE_EFFECTS
= 4,
876 /* Internal within operand_equal_p: */
877 OEP_NO_HASH_CHECK
= 16,
878 /* Internal within inchash::add_expr: */
880 /* Makes operand_equal_p handle more expressions: */
881 OEP_LEXICOGRAPHIC
= 64
884 /* Enum and arrays used for tree allocation stats.
885 Keep in sync with tree.c:tree_node_kind_names. */
886 enum tree_node_kind
{
906 enum annot_expr_kind
{
907 annot_expr_ivdep_kind
,
908 annot_expr_unroll_kind
,
909 annot_expr_no_vector_kind
,
910 annot_expr_vector_kind
,
911 annot_expr_parallel_kind
,
915 /*---------------------------------------------------------------------------
917 ---------------------------------------------------------------------------*/
918 /* When processing aliases at the symbol table level, we need the
919 declaration of target. For this reason we need to queue aliases and
920 process them after all declarations has been produced. */
921 struct GTY(()) alias_pair
{
926 /* An initialization priority. */
927 typedef unsigned short priority_type
;
929 /* The type of a callback function for walking over tree structure. */
930 typedef tree (*walk_tree_fn
) (tree
*, int *, void *);
932 /* The type of a callback function that represents a custom walk_tree. */
933 typedef tree (*walk_tree_lh
) (tree
*, int *, tree (*) (tree
*, int *, void *),
934 void *, hash_set
<tree
> *);
937 /*---------------------------------------------------------------------------
939 ---------------------------------------------------------------------------*/
940 /* A tree node can represent a data type, a variable, an expression
941 or a statement. Each node has a TREE_CODE which says what kind of
942 thing it represents. Some common codes are:
943 INTEGER_TYPE -- represents a type of integers.
944 ARRAY_TYPE -- represents a type of pointer.
945 VAR_DECL -- represents a declared variable.
946 INTEGER_CST -- represents a constant integer value.
947 PLUS_EXPR -- represents a sum (an expression).
949 As for the contents of a tree node: there are some fields
950 that all nodes share. Each TREE_CODE has various special-purpose
951 fields as well. The fields of a node are never accessed directly,
952 always through accessor macros. */
954 /* Every kind of tree node starts with this structure,
955 so all nodes have these fields.
957 See the accessor macros, defined below, for documentation of the
958 fields, and the table below which connects the fields and the
961 struct GTY(()) tree_base
{
962 ENUM_BITFIELD(tree_code
) code
: 16;
964 unsigned side_effects_flag
: 1;
965 unsigned constant_flag
: 1;
966 unsigned addressable_flag
: 1;
967 unsigned volatile_flag
: 1;
968 unsigned readonly_flag
: 1;
969 unsigned asm_written_flag
: 1;
970 unsigned nowarning_flag
: 1;
971 unsigned visited
: 1;
973 unsigned used_flag
: 1;
974 unsigned nothrow_flag
: 1;
975 unsigned static_flag
: 1;
976 unsigned public_flag
: 1;
977 unsigned private_flag
: 1;
978 unsigned protected_flag
: 1;
979 unsigned deprecated_flag
: 1;
980 unsigned default_def_flag
: 1;
983 /* The bits in the following structure should only be used with
984 accessor macros that constrain inputs with tree checking. */
986 unsigned lang_flag_0
: 1;
987 unsigned lang_flag_1
: 1;
988 unsigned lang_flag_2
: 1;
989 unsigned lang_flag_3
: 1;
990 unsigned lang_flag_4
: 1;
991 unsigned lang_flag_5
: 1;
992 unsigned lang_flag_6
: 1;
993 unsigned saturating_flag
: 1;
995 unsigned unsigned_flag
: 1;
996 unsigned packed_flag
: 1;
997 unsigned user_align
: 1;
998 unsigned nameless_flag
: 1;
999 unsigned atomic_flag
: 1;
1000 unsigned spare0
: 3;
1002 unsigned spare1
: 8;
1004 /* This field is only used with TREE_TYPE nodes; the only reason it is
1005 present in tree_base instead of tree_type is to save space. The size
1006 of the field must be large enough to hold addr_space_t values. */
1007 unsigned address_space
: 8;
1010 /* The following fields are present in tree_base to save space. The
1011 nodes using them do not require any of the flags above and so can
1012 make better use of the 4-byte sized word. */
1014 /* The number of HOST_WIDE_INTs in an INTEGER_CST. */
1016 /* The number of HOST_WIDE_INTs if the INTEGER_CST is accessed in
1017 its native precision. */
1018 unsigned char unextended
;
1020 /* The number of HOST_WIDE_INTs if the INTEGER_CST is extended to
1021 wider precisions based on its TYPE_SIGN. */
1022 unsigned char extended
;
1024 /* The number of HOST_WIDE_INTs if the INTEGER_CST is accessed in
1025 offset_int precision, with smaller integers being extended
1026 according to their TYPE_SIGN. This is equal to one of the two
1027 fields above but is cached for speed. */
1028 unsigned char offset
;
1031 /* VEC length. This field is only used with TREE_VEC. */
1034 /* This field is only used with VECTOR_CST. */
1036 /* The value of VECTOR_CST_LOG2_NPATTERNS. */
1037 unsigned int log2_npatterns
: 8;
1039 /* The value of VECTOR_CST_NELTS_PER_PATTERN. */
1040 unsigned int nelts_per_pattern
: 8;
1042 /* For future expansion. */
1043 unsigned int unused
: 16;
1046 /* SSA version number. This field is only used with SSA_NAME. */
1047 unsigned int version
;
1049 /* CHREC_VARIABLE. This field is only used with POLYNOMIAL_CHREC. */
1050 unsigned int chrec_var
;
1052 /* Internal function code. */
1053 enum internal_fn ifn
;
1055 /* OMP_ATOMIC* memory order. */
1056 enum omp_memory_order omp_atomic_memory_order
;
1058 /* The following two fields are used for MEM_REF and TARGET_MEM_REF
1059 expression trees and specify known data non-dependences. For
1060 two memory references in a function they are known to not
1061 alias if dependence_info.clique are equal and dependence_info.base
1062 are distinct. Clique number zero means there is no information,
1063 clique number one is populated from function global information
1064 and thus needs no remapping on transforms like loop unrolling. */
1066 unsigned short clique
;
1067 unsigned short base
;
1069 } GTY((skip(""))) u
;
1072 /* The following table lists the uses of each of the above flags and
1073 for which types of nodes they are defined.
1078 VAR_DECL, PARM_DECL, RESULT_DECL, FUNCTION_DECL, LABEL_DECL
1081 CONSTRUCTOR, IDENTIFIER_NODE
1084 CALL_EXPR_TAILCALL in
1090 PREDICT_EXPR_OUTCOME in
1096 VAR_DECL, FUNCTION_DECL
1099 TREE_NO_TRAMPOLINE in
1105 TREE_SYMBOL_REFERENCED in
1109 TARGET_EXPR, WITH_CLEANUP_EXPR
1111 TRY_CATCH_IS_CLEANUP in
1117 TYPE_REF_CAN_ALIAS_ALL in
1118 POINTER_TYPE, REFERENCE_TYPE
1126 TRANSACTION_EXPR_OUTER in
1129 SSA_NAME_ANTI_RANGE_P in
1138 INTEGER_CST, REAL_CST, COMPLEX_CST, VECTOR_CST
1141 VAR_DECL, FUNCTION_DECL
1144 CONSTRUCTOR_NO_CLEARING in
1150 CALL_EXPR_VA_ARG_PACK in
1153 TYPE_CACHED_VALUES_P in
1156 SAVE_EXPR_RESOLVED_P in
1159 OMP_CLAUSE_LASTPRIVATE_FIRSTPRIVATE in
1160 OMP_CLAUSE_LASTPRIVATE
1162 OMP_CLAUSE_PRIVATE_DEBUG in
1165 OMP_CLAUSE_LINEAR_NO_COPYIN in
1168 OMP_CLAUSE_MAP_ZERO_BIAS_ARRAY_SECTION in
1171 OMP_CLAUSE_REDUCTION_OMP_ORIG_REF in
1172 OMP_CLAUSE_{,TASK_,IN_}REDUCTION
1174 TRANSACTION_EXPR_RELAXED in
1177 FALLTHROUGH_LABEL_P in
1180 SSA_NAME_IS_VIRTUAL_OPERAND in
1183 EXPR_LOCATION_WRAPPER_P in
1184 NON_LVALUE_EXPR, VIEW_CONVERT_EXPR
1191 CALL_EXPR_RETURN_SLOT_OPT in
1197 OMP_PARALLEL_COMBINED in
1200 OMP_CLAUSE_PRIVATE_OUTER_REF in
1203 OMP_CLAUSE_LINEAR_NO_COPYOUT in
1206 TYPE_REF_IS_RVALUE in
1218 CALL_FROM_THUNK_P and
1219 CALL_ALLOCA_FOR_VAR_P in
1222 OMP_CLAUSE_LINEAR_VARIABLE_STRIDE in
1230 TREE_SIDE_EFFECTS in
1240 TREE_THIS_VOLATILE in
1263 TYPE_SIZES_GIMPLIFIED in
1277 VAR_DECL, FUNCTION_DECL, TYPE_DECL
1278 RECORD_TYPE, UNION_TYPE, QUAL_UNION_TYPE
1281 SSA_NAME_OCCURS_IN_ABNORMAL_PHI in
1298 INDIRECT_REF, MEM_REF, TARGET_MEM_REF, ARRAY_REF, ARRAY_RANGE_REF
1300 SSA_NAME_IN_FREE_LIST in
1312 IDENTIFIER_TRANSPARENT_ALIAS in
1315 SSA_NAME_POINTS_TO_READONLY_MEMORY in
1321 all trees (used liberally by many passes)
1325 TYPE_REVERSE_STORAGE_ORDER in
1326 RECORD_TYPE, UNION_TYPE, QUAL_UNION_TYPE, ARRAY_TYPE
1331 VAR_DECL_IS_VIRTUAL_OPERAND in
1346 RECORD_TYPE, UNION_TYPE and QUAL_UNION_TYPE
1348 TYPE_VECTOR_OPAQUE in
1351 SSA_NAME_IS_DEFAULT_DEF in
1354 DECL_NONLOCAL_FRAME in
1357 REF_REVERSE_STORAGE_ORDER in
1358 BIT_FIELD_REF, MEM_REF
1360 FUNC_ADDR_BY_DESCRIPTOR in
1363 CALL_EXPR_BY_DESCRIPTOR in
1367 struct GTY(()) tree_typed
{
1368 struct tree_base base
;
1372 struct GTY(()) tree_common
{
1373 struct tree_typed typed
;
1377 struct GTY(()) tree_int_cst
{
1378 struct tree_typed typed
;
1379 HOST_WIDE_INT val
[1];
1383 struct GTY(()) tree_real_cst
{
1384 struct tree_typed typed
;
1385 struct real_value
* real_cst_ptr
;
1388 struct GTY(()) tree_fixed_cst
{
1389 struct tree_typed typed
;
1390 struct fixed_value
* fixed_cst_ptr
;
1393 struct GTY(()) tree_string
{
1394 struct tree_typed typed
;
1399 struct GTY(()) tree_complex
{
1400 struct tree_typed typed
;
1405 struct GTY(()) tree_vector
{
1406 struct tree_typed typed
;
1407 tree
GTY ((length ("vector_cst_encoded_nelts ((tree) &%h)"))) elts
[1];
1410 struct GTY(()) tree_poly_int_cst
{
1411 struct tree_typed typed
;
1412 tree coeffs
[NUM_POLY_INT_COEFFS
];
1415 struct GTY(()) tree_identifier
{
1416 struct tree_common common
;
1417 struct ht_identifier id
;
1420 struct GTY(()) tree_list
{
1421 struct tree_common common
;
1426 struct GTY(()) tree_vec
{
1427 struct tree_common common
;
1428 tree
GTY ((length ("TREE_VEC_LENGTH ((tree)&%h)"))) a
[1];
1431 /* A single element of a CONSTRUCTOR. VALUE holds the actual value of the
1432 element. INDEX can optionally design the position of VALUE: in arrays,
1433 it is the index where VALUE has to be placed; in structures, it is the
1434 FIELD_DECL of the member. */
1435 struct GTY(()) constructor_elt
{
1440 struct GTY(()) tree_constructor
{
1441 struct tree_typed typed
;
1442 vec
<constructor_elt
, va_gc
> *elts
;
1445 enum omp_clause_depend_kind
1447 OMP_CLAUSE_DEPEND_IN
,
1448 OMP_CLAUSE_DEPEND_OUT
,
1449 OMP_CLAUSE_DEPEND_INOUT
,
1450 OMP_CLAUSE_DEPEND_MUTEXINOUTSET
,
1451 OMP_CLAUSE_DEPEND_SOURCE
,
1452 OMP_CLAUSE_DEPEND_SINK
,
1453 OMP_CLAUSE_DEPEND_DEPOBJ
,
1454 OMP_CLAUSE_DEPEND_LAST
1457 enum omp_clause_proc_bind_kind
1459 /* Numbers should match omp_proc_bind_t enum in omp.h. */
1460 OMP_CLAUSE_PROC_BIND_FALSE
= 0,
1461 OMP_CLAUSE_PROC_BIND_TRUE
= 1,
1462 OMP_CLAUSE_PROC_BIND_MASTER
= 2,
1463 OMP_CLAUSE_PROC_BIND_CLOSE
= 3,
1464 OMP_CLAUSE_PROC_BIND_SPREAD
= 4,
1465 OMP_CLAUSE_PROC_BIND_LAST
1468 enum omp_clause_linear_kind
1470 OMP_CLAUSE_LINEAR_DEFAULT
,
1471 OMP_CLAUSE_LINEAR_REF
,
1472 OMP_CLAUSE_LINEAR_VAL
,
1473 OMP_CLAUSE_LINEAR_UVAL
1476 struct GTY(()) tree_exp
{
1477 struct tree_typed typed
;
1479 tree
GTY ((special ("tree_exp"),
1480 desc ("TREE_CODE ((tree) &%0)")))
1484 /* Immediate use linking structure. This structure is used for maintaining
1485 a doubly linked list of uses of an SSA_NAME. */
1486 struct GTY(()) ssa_use_operand_t
{
1487 struct ssa_use_operand_t
* GTY((skip(""))) prev
;
1488 struct ssa_use_operand_t
* GTY((skip(""))) next
;
1489 /* Immediate uses for a given SSA name are maintained as a cyclic
1490 list. To recognize the root of this list, the location field
1491 needs to point to the original SSA name. Since statements and
1492 SSA names are of different data types, we need this union. See
1493 the explanation in struct imm_use_iterator. */
1494 union { gimple
*stmt
; tree ssa_name
; } GTY((skip(""))) loc
;
1495 tree
*GTY((skip(""))) use
;
1498 struct GTY(()) tree_ssa_name
{
1499 struct tree_typed typed
;
1501 /* _DECL wrapped by this SSA name. */
1504 /* Statement that defines this SSA name. */
1507 /* Value range information. */
1508 union ssa_name_info_type
{
1509 /* Pointer attributes used for alias analysis. */
1510 struct GTY ((tag ("0"))) ptr_info_def
*ptr_info
;
1511 /* Value range attributes used for zero/sign extension elimination. */
1512 struct GTY ((tag ("1"))) range_info_def
*range_info
;
1513 } GTY ((desc ("%1.typed.type ?" \
1514 "!POINTER_TYPE_P (TREE_TYPE ((tree)&%1)) : 2"))) info
;
1516 /* Immediate uses list for this SSA_NAME. */
1517 struct ssa_use_operand_t imm_uses
;
1520 struct GTY(()) phi_arg_d
{
1521 /* imm_use MUST be the first element in struct because we do some
1522 pointer arithmetic with it. See phi_arg_index_from_use. */
1523 struct ssa_use_operand_t imm_use
;
1528 struct GTY(()) tree_omp_clause
{
1529 struct tree_common common
;
1531 enum omp_clause_code code
;
1532 union omp_clause_subcode
{
1533 enum omp_clause_default_kind default_kind
;
1534 enum omp_clause_schedule_kind schedule_kind
;
1535 enum omp_clause_depend_kind depend_kind
;
1536 /* See include/gomp-constants.h for enum gomp_map_kind's values. */
1537 unsigned int map_kind
;
1538 enum omp_clause_proc_bind_kind proc_bind_kind
;
1539 enum tree_code reduction_code
;
1540 enum omp_clause_linear_kind linear_kind
;
1541 enum tree_code if_modifier
;
1542 enum omp_clause_defaultmap_kind defaultmap_kind
;
1543 enum omp_clause_bind_kind bind_kind
;
1544 /* The dimension a OMP_CLAUSE__GRIDDIM_ clause of a gridified target
1545 construct describes. */
1546 unsigned int dimension
;
1547 } GTY ((skip
)) subcode
;
1549 /* The gimplification of OMP_CLAUSE_REDUCTION_{INIT,MERGE} for omp-low's
1551 gimple_seq gimple_reduction_init
;
1552 gimple_seq gimple_reduction_merge
;
1554 tree
GTY ((length ("omp_clause_num_ops[OMP_CLAUSE_CODE ((tree)&%h)]")))
1558 struct GTY(()) tree_block
{
1559 struct tree_base base
;
1565 location_t end_locus
;
1568 vec
<tree
, va_gc
> *nonlocalized_vars
;
1572 tree abstract_origin
;
1573 tree fragment_origin
;
1574 tree fragment_chain
;
1576 /* Pointer to the DWARF lexical block. */
1577 struct die_struct
*die
;
1580 struct GTY(()) tree_type_common
{
1581 struct tree_common common
;
1587 unsigned int precision
: 10;
1588 unsigned no_force_blk_flag
: 1;
1589 unsigned needs_constructing_flag
: 1;
1590 unsigned transparent_aggr_flag
: 1;
1591 unsigned restrict_flag
: 1;
1592 unsigned contains_placeholder_bits
: 2;
1594 ENUM_BITFIELD(machine_mode
) mode
: 8;
1596 /* TYPE_STRING_FLAG for INTEGER_TYPE and ARRAY_TYPE.
1597 TYPE_CXX_ODR_P for RECORD_TYPE and UNION_TYPE. */
1598 unsigned string_flag
: 1;
1599 unsigned lang_flag_0
: 1;
1600 unsigned lang_flag_1
: 1;
1601 unsigned lang_flag_2
: 1;
1602 unsigned lang_flag_3
: 1;
1603 unsigned lang_flag_4
: 1;
1604 unsigned lang_flag_5
: 1;
1605 unsigned lang_flag_6
: 1;
1606 unsigned lang_flag_7
: 1;
1608 /* TYPE_ALIGN in log2; this has to be large enough to hold values
1609 of the maximum of BIGGEST_ALIGNMENT and MAX_OFILE_ALIGNMENT,
1610 the latter being usually the larger. For ELF it is 8<<28,
1611 so we need to store the value 32 (not 31, as we need the zero
1612 as well), hence six bits. */
1614 unsigned warn_if_not_align
: 6;
1615 unsigned typeless_storage
: 1;
1616 unsigned empty_flag
: 1;
1617 unsigned spare
: 17;
1619 alias_set_type alias_set
;
1622 union tree_type_symtab
{
1623 int GTY ((tag ("TYPE_SYMTAB_IS_ADDRESS"))) address
;
1624 struct die_struct
* GTY ((tag ("TYPE_SYMTAB_IS_DIE"))) die
;
1625 } GTY ((desc ("debug_hooks->tree_type_symtab_field"))) symtab
;
1633 struct GTY(()) tree_type_with_lang_specific
{
1634 struct tree_type_common common
;
1635 /* Points to a structure whose details depend on the language in use. */
1636 struct lang_type
*lang_specific
;
1639 struct GTY(()) tree_type_non_common
{
1640 struct tree_type_with_lang_specific with_lang_specific
;
1647 struct GTY (()) tree_binfo
{
1648 struct tree_common common
;
1654 vec
<tree
, va_gc
> *base_accesses
;
1660 vec
<tree
, va_gc
> base_binfos
;
1663 struct GTY(()) tree_decl_minimal
{
1664 struct tree_common common
;
1671 struct GTY(()) tree_decl_common
{
1672 struct tree_decl_minimal common
;
1675 ENUM_BITFIELD(machine_mode
) mode
: 8;
1677 unsigned nonlocal_flag
: 1;
1678 unsigned virtual_flag
: 1;
1679 unsigned ignored_flag
: 1;
1680 unsigned abstract_flag
: 1;
1681 unsigned artificial_flag
: 1;
1682 unsigned preserve_flag
: 1;
1683 unsigned debug_expr_is_from
: 1;
1685 unsigned lang_flag_0
: 1;
1686 unsigned lang_flag_1
: 1;
1687 unsigned lang_flag_2
: 1;
1688 unsigned lang_flag_3
: 1;
1689 unsigned lang_flag_4
: 1;
1690 unsigned lang_flag_5
: 1;
1691 unsigned lang_flag_6
: 1;
1692 unsigned lang_flag_7
: 1;
1693 unsigned lang_flag_8
: 1;
1695 /* In VAR_DECL and PARM_DECL, this is DECL_REGISTER
1696 IN TRANSLATION_UNIT_DECL, this is TRANSLATION_UNIT_WARN_EMPTY_P. */
1697 unsigned decl_flag_0
: 1;
1698 /* In FIELD_DECL, this is DECL_BIT_FIELD
1699 In VAR_DECL and FUNCTION_DECL, this is DECL_EXTERNAL.
1700 In TYPE_DECL, this is TYPE_DECL_SUPPRESS_DEBUG. */
1701 unsigned decl_flag_1
: 1;
1702 /* In FIELD_DECL, this is DECL_NONADDRESSABLE_P
1703 In VAR_DECL, PARM_DECL and RESULT_DECL, this is
1704 DECL_HAS_VALUE_EXPR_P. */
1705 unsigned decl_flag_2
: 1;
1706 /* In FIELD_DECL, this is DECL_PADDING_P. */
1707 unsigned decl_flag_3
: 1;
1708 /* Logically, these two would go in a theoretical base shared by var and
1710 unsigned gimple_reg_flag
: 1;
1711 /* In VAR_DECL, PARM_DECL and RESULT_DECL, this is DECL_BY_REFERENCE. */
1712 unsigned decl_by_reference_flag
: 1;
1713 /* In a VAR_DECL and PARM_DECL, this is DECL_READ_P. */
1714 unsigned decl_read_flag
: 1;
1715 /* In a VAR_DECL or RESULT_DECL, this is DECL_NONSHAREABLE. */
1716 /* In a PARM_DECL, this is DECL_HIDDEN_STRING_LENGTH. */
1717 unsigned decl_nonshareable_flag
: 1;
1719 /* DECL_OFFSET_ALIGN, used only for FIELD_DECLs. */
1720 unsigned int off_align
: 6;
1722 /* DECL_ALIGN. It should have the same size as TYPE_ALIGN. */
1723 unsigned int align
: 6;
1725 /* DECL_WARN_IF_NOT_ALIGN. It should have the same size as
1726 TYPE_WARN_IF_NOT_ALIGN. */
1727 unsigned int warn_if_not_align
: 6;
1729 /* 14 bits unused. */
1731 /* UID for points-to sets, stable over copying from inlining. */
1732 unsigned int pt_uid
;
1737 tree abstract_origin
;
1739 /* Points to a structure whose details depend on the language in use. */
1740 struct lang_decl
*lang_specific
;
1743 struct GTY(()) tree_decl_with_rtl
{
1744 struct tree_decl_common common
;
1748 struct GTY(()) tree_field_decl
{
1749 struct tree_decl_common common
;
1752 tree bit_field_type
;
1758 struct GTY(()) tree_label_decl
{
1759 struct tree_decl_with_rtl common
;
1761 int eh_landing_pad_nr
;
1764 struct GTY(()) tree_result_decl
{
1765 struct tree_decl_with_rtl common
;
1768 struct GTY(()) tree_const_decl
{
1769 struct tree_decl_common common
;
1772 struct GTY(()) tree_parm_decl
{
1773 struct tree_decl_with_rtl common
;
1777 struct GTY(()) tree_decl_with_vis
{
1778 struct tree_decl_with_rtl common
;
1779 tree assembler_name
;
1780 struct symtab_node
*symtab_node
;
1782 /* Belong to VAR_DECL exclusively. */
1783 unsigned defer_output
: 1;
1784 unsigned hard_register
: 1;
1785 unsigned common_flag
: 1;
1786 unsigned in_text_section
: 1;
1787 unsigned in_constant_pool
: 1;
1788 unsigned dllimport_flag
: 1;
1789 /* Don't belong to VAR_DECL exclusively. */
1790 unsigned weak_flag
: 1;
1792 unsigned seen_in_bind_expr
: 1;
1793 unsigned comdat_flag
: 1;
1794 /* Used for FUNCTION_DECL, VAR_DECL and in C++ for TYPE_DECL. */
1795 ENUM_BITFIELD(symbol_visibility
) visibility
: 2;
1796 unsigned visibility_specified
: 1;
1798 /* Belong to FUNCTION_DECL exclusively. */
1799 unsigned init_priority_p
: 1;
1800 /* Used by C++ only. Might become a generic decl flag. */
1801 unsigned shadowed_for_var_p
: 1;
1802 /* Belong to FUNCTION_DECL exclusively. */
1803 unsigned cxx_constructor
: 1;
1804 /* Belong to FUNCTION_DECL exclusively. */
1805 unsigned cxx_destructor
: 1;
1806 /* Belong to FUNCTION_DECL exclusively. */
1808 /* Belong to FUNCTION_DECL exclusively. */
1809 unsigned regdecl_flag
: 1;
1810 /* 14 unused bits. */
1813 struct GTY(()) tree_var_decl
{
1814 struct tree_decl_with_vis common
;
1817 struct GTY(()) tree_decl_non_common
{
1818 struct tree_decl_with_vis common
;
1819 /* Almost all FE's use this. */
1823 /* Classify a special function declaration type. */
1825 enum function_decl_type
1835 /* FUNCTION_DECL inherits from DECL_NON_COMMON because of the use of the
1836 arguments/result/saved_tree fields by front ends. It was either inherit
1837 FUNCTION_DECL from non_common, or inherit non_common from FUNCTION_DECL,
1838 which seemed a bit strange. */
1840 struct GTY(()) tree_function_decl
{
1841 struct tree_decl_non_common common
;
1845 /* Arguments of the function. */
1847 /* The personality function. Used for stack unwinding. */
1850 /* Function specific options that are used by this function. */
1851 tree function_specific_target
; /* target options */
1852 tree function_specific_optimization
; /* optimization options */
1854 /* Generic function body. */
1856 /* Index within a virtual table. */
1859 /* In a FUNCTION_DECL for which DECL_BUILT_IN holds, this is
1860 DECL_FUNCTION_CODE. Otherwise unused.
1861 ??? The bitfield needs to be able to hold all target function
1863 ENUM_BITFIELD(built_in_function
) function_code
: 12;
1864 ENUM_BITFIELD(built_in_class
) built_in_class
: 2;
1866 unsigned static_ctor_flag
: 1;
1867 unsigned static_dtor_flag
: 1;
1869 unsigned uninlinable
: 1;
1870 unsigned possibly_inlined
: 1;
1871 unsigned novops_flag
: 1;
1872 unsigned returns_twice_flag
: 1;
1873 unsigned malloc_flag
: 1;
1874 unsigned declared_inline_flag
: 1;
1875 unsigned no_inline_warning_flag
: 1;
1877 unsigned no_instrument_function_entry_exit
: 1;
1879 /* Align the bitfield to boundary of a byte. */
1880 ENUM_BITFIELD(function_decl_type
) decl_type
: 2;
1882 unsigned no_limit_stack
: 1;
1883 unsigned disregard_inline_limits
: 1;
1884 unsigned pure_flag
: 1;
1885 unsigned looping_const_or_pure_flag
: 1;
1886 unsigned has_debug_args_flag
: 1;
1887 unsigned versioned_function
: 1;
1892 struct GTY(()) tree_translation_unit_decl
{
1893 struct tree_decl_common common
;
1894 /* Source language of this translation unit. Used for DWARF output. */
1895 const char * GTY((skip(""))) language
;
1896 /* TODO: Non-optimization used to build this translation unit. */
1897 /* TODO: Root of a partial DWARF tree for global types and decls. */
1900 struct GTY(()) tree_type_decl
{
1901 struct tree_decl_non_common common
;
1905 struct GTY ((chain_next ("%h.next"), chain_prev ("%h.prev"))) tree_statement_list_node
1907 struct tree_statement_list_node
*prev
;
1908 struct tree_statement_list_node
*next
;
1912 struct GTY(()) tree_statement_list
1914 struct tree_typed typed
;
1915 struct tree_statement_list_node
*head
;
1916 struct tree_statement_list_node
*tail
;
1920 /* Optimization options used by a function. */
1922 struct GTY(()) tree_optimization_option
{
1923 struct tree_base base
;
1925 /* The optimization options used by the user. */
1926 struct cl_optimization
*opts
;
1928 /* Target optabs for this set of optimization options. This is of
1929 type `struct target_optabs *'. */
1930 void *GTY ((atomic
)) optabs
;
1932 /* The value of this_target_optabs against which the optabs above were
1934 struct target_optabs
*GTY ((skip
)) base_optabs
;
1937 /* Forward declaration, defined in target-globals.h. */
1939 class GTY(()) target_globals
;
1941 /* Target options used by a function. */
1943 struct GTY(()) tree_target_option
{
1944 struct tree_base base
;
1946 /* Target globals for the corresponding target option. */
1947 class target_globals
*globals
;
1949 /* The optimization options used by the user. */
1950 struct cl_target_option
*opts
;
1953 /* Define the overall contents of a tree node.
1954 It may be any of the structures declared above
1955 for various types of node. */
1956 union GTY ((ptr_alias (union lang_tree_node
),
1957 desc ("tree_node_structure (&%h)"), variable_size
)) tree_node
{
1958 struct tree_base
GTY ((tag ("TS_BASE"))) base
;
1959 struct tree_typed
GTY ((tag ("TS_TYPED"))) typed
;
1960 struct tree_common
GTY ((tag ("TS_COMMON"))) common
;
1961 struct tree_int_cst
GTY ((tag ("TS_INT_CST"))) int_cst
;
1962 struct tree_poly_int_cst
GTY ((tag ("TS_POLY_INT_CST"))) poly_int_cst
;
1963 struct tree_real_cst
GTY ((tag ("TS_REAL_CST"))) real_cst
;
1964 struct tree_fixed_cst
GTY ((tag ("TS_FIXED_CST"))) fixed_cst
;
1965 struct tree_vector
GTY ((tag ("TS_VECTOR"))) vector
;
1966 struct tree_string
GTY ((tag ("TS_STRING"))) string
;
1967 struct tree_complex
GTY ((tag ("TS_COMPLEX"))) complex;
1968 struct tree_identifier
GTY ((tag ("TS_IDENTIFIER"))) identifier
;
1969 struct tree_decl_minimal
GTY((tag ("TS_DECL_MINIMAL"))) decl_minimal
;
1970 struct tree_decl_common
GTY ((tag ("TS_DECL_COMMON"))) decl_common
;
1971 struct tree_decl_with_rtl
GTY ((tag ("TS_DECL_WRTL"))) decl_with_rtl
;
1972 struct tree_decl_non_common
GTY ((tag ("TS_DECL_NON_COMMON")))
1974 struct tree_parm_decl
GTY ((tag ("TS_PARM_DECL"))) parm_decl
;
1975 struct tree_decl_with_vis
GTY ((tag ("TS_DECL_WITH_VIS"))) decl_with_vis
;
1976 struct tree_var_decl
GTY ((tag ("TS_VAR_DECL"))) var_decl
;
1977 struct tree_field_decl
GTY ((tag ("TS_FIELD_DECL"))) field_decl
;
1978 struct tree_label_decl
GTY ((tag ("TS_LABEL_DECL"))) label_decl
;
1979 struct tree_result_decl
GTY ((tag ("TS_RESULT_DECL"))) result_decl
;
1980 struct tree_const_decl
GTY ((tag ("TS_CONST_DECL"))) const_decl
;
1981 struct tree_type_decl
GTY ((tag ("TS_TYPE_DECL"))) type_decl
;
1982 struct tree_function_decl
GTY ((tag ("TS_FUNCTION_DECL"))) function_decl
;
1983 struct tree_translation_unit_decl
GTY ((tag ("TS_TRANSLATION_UNIT_DECL")))
1984 translation_unit_decl
;
1985 struct tree_type_common
GTY ((tag ("TS_TYPE_COMMON"))) type_common
;
1986 struct tree_type_with_lang_specific
GTY ((tag ("TS_TYPE_WITH_LANG_SPECIFIC")))
1987 type_with_lang_specific
;
1988 struct tree_type_non_common
GTY ((tag ("TS_TYPE_NON_COMMON")))
1990 struct tree_list
GTY ((tag ("TS_LIST"))) list
;
1991 struct tree_vec
GTY ((tag ("TS_VEC"))) vec
;
1992 struct tree_exp
GTY ((tag ("TS_EXP"))) exp
;
1993 struct tree_ssa_name
GTY ((tag ("TS_SSA_NAME"))) ssa_name
;
1994 struct tree_block
GTY ((tag ("TS_BLOCK"))) block
;
1995 struct tree_binfo
GTY ((tag ("TS_BINFO"))) binfo
;
1996 struct tree_statement_list
GTY ((tag ("TS_STATEMENT_LIST"))) stmt_list
;
1997 struct tree_constructor
GTY ((tag ("TS_CONSTRUCTOR"))) constructor
;
1998 struct tree_omp_clause
GTY ((tag ("TS_OMP_CLAUSE"))) omp_clause
;
1999 struct tree_optimization_option
GTY ((tag ("TS_OPTIMIZATION"))) optimization
;
2000 struct tree_target_option
GTY ((tag ("TS_TARGET_OPTION"))) target_option
;
2003 /* Structure describing an attribute and a function to handle it. */
2004 struct attribute_spec
{
2005 /* The name of the attribute (without any leading or trailing __),
2006 or NULL to mark the end of a table of attributes. */
2008 /* The minimum length of the list of arguments of the attribute. */
2010 /* The maximum length of the list of arguments of the attribute
2011 (-1 for no maximum). */
2013 /* Whether this attribute requires a DECL. If it does, it will be passed
2014 from types of DECLs, function return types and array element types to
2015 the DECLs, function types and array types respectively; but when
2016 applied to a type in any other circumstances, it will be ignored with
2017 a warning. (If greater control is desired for a given attribute,
2018 this should be false, and the flags argument to the handler may be
2019 used to gain greater control in that case.) */
2021 /* Whether this attribute requires a type. If it does, it will be passed
2022 from a DECL to the type of that DECL. */
2024 /* Whether this attribute requires a function (or method) type. If it does,
2025 it will be passed from a function pointer type to the target type,
2026 and from a function return type (which is not itself a function
2027 pointer type) to the function type. */
2028 bool function_type_required
;
2029 /* Specifies if attribute affects type's identity. */
2030 bool affects_type_identity
;
2031 /* Function to handle this attribute. NODE points to the node to which
2032 the attribute is to be applied. If a DECL, it should be modified in
2033 place; if a TYPE, a copy should be created. NAME is the canonicalized
2034 name of the attribute i.e. without any leading or trailing underscores.
2035 ARGS is the TREE_LIST of the arguments (which may be NULL). FLAGS gives
2036 further information about the context of the attribute. Afterwards, the
2037 attributes will be added to the DECL_ATTRIBUTES or TYPE_ATTRIBUTES, as
2038 appropriate, unless *NO_ADD_ATTRS is set to true (which should be done on
2039 error, as well as in any other cases when the attributes should not be
2040 added to the DECL or TYPE). Depending on FLAGS, any attributes to be
2041 applied to another type or DECL later may be returned;
2042 otherwise the return value should be NULL_TREE. This pointer may be
2043 NULL if no special handling is required beyond the checks implied
2044 by the rest of this structure. */
2045 tree (*handler
) (tree
*node
, tree name
, tree args
,
2046 int flags
, bool *no_add_attrs
);
2048 /* Specifies the name of an attribute that's mutually exclusive with
2049 this one, and whether the relationship applies to the function,
2050 variable, or type form of the attribute. */
2058 /* An array of attribute exclusions describing names of other attributes
2059 that this attribute is mutually exclusive with. */
2060 const exclusions
*exclude
;
2063 /* These functions allow a front-end to perform a manual layout of a
2064 RECORD_TYPE. (For instance, if the placement of subsequent fields
2065 depends on the placement of fields so far.) Begin by calling
2066 start_record_layout. Then, call place_field for each of the
2067 fields. Then, call finish_record_layout. See layout_type for the
2068 default way in which these functions are used. */
2069 typedef struct record_layout_info_s
{
2070 /* The RECORD_TYPE that we are laying out. */
2072 /* The offset into the record so far, in bytes, not including bits in
2075 /* The last known alignment of SIZE. */
2076 unsigned int offset_align
;
2077 /* The bit position within the last OFFSET_ALIGN bits, in bits. */
2079 /* The alignment of the record so far, in bits. */
2080 unsigned int record_align
;
2081 /* The alignment of the record so far, ignoring #pragma pack and
2082 __attribute__ ((packed)), in bits. */
2083 unsigned int unpacked_align
;
2084 /* The previous field laid out. */
2086 /* The static variables (i.e., class variables, as opposed to
2087 instance variables) encountered in T. */
2088 vec
<tree
, va_gc
> *pending_statics
;
2089 /* Bits remaining in the current alignment group */
2090 int remaining_in_alignment
;
2091 /* True if we've seen a packed field that didn't have normal
2092 alignment anyway. */
2093 int packed_maybe_necessary
;
2094 } *record_layout_info
;
2096 /* Iterator for going through the function arguments. */
2097 struct function_args_iterator
{
2098 tree next
; /* TREE_LIST pointing to the next argument */
2101 /* Structures to map from a tree to another tree. */
2102 struct GTY(()) tree_map_base
{
2106 /* Map from a tree to another tree. */
2108 struct GTY((for_user
)) tree_map
{
2109 struct tree_map_base base
;
2114 /* Map from a decl tree to another tree. */
2115 struct GTY((for_user
)) tree_decl_map
{
2116 struct tree_map_base base
;
2120 /* Map from a tree to an int. */
2121 struct GTY((for_user
)) tree_int_map
{
2122 struct tree_map_base base
;
2126 /* Map from a decl tree to a tree vector. */
2127 struct GTY((for_user
)) tree_vec_map
{
2128 struct tree_map_base base
;
2129 vec
<tree
, va_gc
> *to
;
2132 /* Abstract iterators for CALL_EXPRs. These static inline definitions
2133 have to go towards the end of tree.h so that union tree_node is fully
2134 defined by this point. */
2136 /* Structure containing iterator state. */
2137 struct call_expr_arg_iterator
{
2138 tree t
; /* the call_expr */
2139 int n
; /* argument count */
2140 int i
; /* next argument index */
2143 struct const_call_expr_arg_iterator
{
2144 const_tree t
; /* the call_expr */
2145 int n
; /* argument count */
2146 int i
; /* next argument index */
2149 /* The builtin_info structure holds the FUNCTION_DECL of the standard builtin
2150 function, and flags. */
2151 struct GTY(()) builtin_info_type
{
2153 /* Whether the user can use <xxx> instead of explicitly using calls
2154 to __builtin_<xxx>. */
2155 unsigned implicit_p
: 1;
2156 /* Whether the user has provided a declaration of <xxx>. */
2157 unsigned declared_p
: 1;
2160 /* Information about a _FloatN or _FloatNx type that may be
2162 struct floatn_type_info
{
2163 /* The number N in the type name. */
2165 /* Whether it is an extended type _FloatNx (true) or an interchange
2171 /*---------------------------------------------------------------------------
2173 ---------------------------------------------------------------------------*/
2174 /* Matrix describing the structures contained in a given tree code. */
2175 extern bool tree_contains_struct
[MAX_TREE_CODES
][64];
2177 /* Class of tree given its code. */
2178 extern const enum tree_code_class tree_code_type
[];
2180 /* Each tree code class has an associated string representation.
2181 These must correspond to the tree_code_class entries. */
2182 extern const char *const tree_code_class_strings
[];
2184 /* Number of argument-words in each kind of tree-node. */
2185 extern const unsigned char tree_code_length
[];
2187 /* Vector of all alias pairs for global symbols. */
2188 extern GTY(()) vec
<alias_pair
, va_gc
> *alias_pairs
;
2190 /* Names of all the built_in classes. */
2191 extern const char *const built_in_class_names
[BUILT_IN_LAST
];
2193 /* Names of all the built_in functions. */
2194 extern const char * built_in_names
[(int) END_BUILTINS
];
2196 /* Number of operands and names for each OMP_CLAUSE node. */
2197 extern unsigned const char omp_clause_num_ops
[];
2198 extern const char * const omp_clause_code_name
[];
2200 /* A vector of all translation-units. */
2201 extern GTY (()) vec
<tree
, va_gc
> *all_translation_units
;
2203 /* Vector of standard trees used by the C compiler. */
2204 extern GTY(()) tree global_trees
[TI_MAX
];
2206 /* The standard C integer types. Use integer_type_kind to index into
2208 extern GTY(()) tree integer_types
[itk_none
];
2210 /* Types used to represent sizes. */
2211 extern GTY(()) tree sizetype_tab
[(int) stk_type_kind_last
];
2213 /* Arrays for keeping track of tree node statistics. */
2214 extern uint64_t tree_node_counts
[];
2215 extern uint64_t tree_node_sizes
[];
2217 /* True if we are in gimple form and the actions of the folders need to
2218 be restricted. False if we are not in gimple form and folding is not
2219 restricted to creating gimple expressions. */
2220 extern bool in_gimple_form
;
2222 /* Functional interface to the builtin functions. */
2223 extern GTY(()) builtin_info_type builtin_info
[(int)END_BUILTINS
];
2225 /* If nonzero, an upper limit on alignment of structure fields, in bits, */
2226 extern unsigned int maximum_field_alignment
;
2228 /* Points to the FUNCTION_DECL of the function whose body we are reading. */
2229 extern GTY(()) tree current_function_decl
;
2231 /* Nonzero means a FUNC_BEGIN label was emitted. */
2232 extern GTY(()) const char * current_function_func_begin_label
;
2234 /* Information about the _FloatN and _FloatNx types. */
2235 extern const floatn_type_info floatn_nx_types
[NUM_FLOATN_NX_TYPES
];
2237 #endif // GCC_TREE_CORE_H