1 /* Core data structures for the 'tree' type.
2 Copyright (C) 1989-2017 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 can not 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"
171 #define DEF_BUILTIN(ENUM, N, C, T, LT, B, F, NA, AT, IM, COND)
172 #define DEF_BUILTIN_CHKP(ENUM, N, C, T, LT, B, F, NA, AT, IM, COND) \
173 ENUM##_CHKP = ENUM + BEGIN_CHKP_BUILTINS + 1,
174 #include "builtins.def"
176 END_CHKP_BUILTINS
= BEGIN_CHKP_BUILTINS
* 2 + 1,
178 /* Complex division routines in libgcc. These are done via builtins
179 because emit_library_call_value can't handle complex values. */
180 BUILT_IN_COMPLEX_MUL_MIN
,
181 BUILT_IN_COMPLEX_MUL_MAX
182 = BUILT_IN_COMPLEX_MUL_MIN
183 + MAX_MODE_COMPLEX_FLOAT
184 - MIN_MODE_COMPLEX_FLOAT
,
186 BUILT_IN_COMPLEX_DIV_MIN
,
187 BUILT_IN_COMPLEX_DIV_MAX
188 = BUILT_IN_COMPLEX_DIV_MIN
189 + MAX_MODE_COMPLEX_FLOAT
190 - MIN_MODE_COMPLEX_FLOAT
,
192 /* Upper bound on non-language-specific builtins. */
196 /* Internal functions. */
198 #define DEF_INTERNAL_FN(CODE, FLAGS, FNSPEC) IFN_##CODE,
199 #include "internal-fn.def"
203 /* An enum that combines target-independent built-in functions with
204 internal functions, so that they can be treated in a similar way.
205 The numbers for built-in functions are the same as for the
206 built_in_function enum. The numbers for internal functions
207 start at END_BUITLINS. */
209 #define DEF_BUILTIN(ENUM, N, C, T, LT, B, F, NA, AT, IM, COND) \
210 CFN_##ENUM = int (ENUM),
211 #include "builtins.def"
213 #define DEF_BUILTIN(ENUM, N, C, T, LT, B, F, NA, AT, IM, COND)
214 #define DEF_BUILTIN_CHKP(ENUM, N, C, T, LT, B, F, NA, AT, IM, COND) \
215 CFN_##ENUM##_CHKP = int (ENUM##_CHKP),
216 #include "builtins.def"
218 #define DEF_INTERNAL_FN(CODE, FLAGS, FNSPEC) \
219 CFN_##CODE = int (END_BUILTINS) + int (IFN_##CODE),
220 #include "internal-fn.def"
225 /* Tree code classes. Each tree_code has an associated code class
226 represented by a TREE_CODE_CLASS. */
227 enum tree_code_class
{
228 tcc_exceptional
, /* An exceptional code (fits no category). */
229 tcc_constant
, /* A constant. */
230 /* Order of tcc_type and tcc_declaration is important. */
231 tcc_type
, /* A type object code. */
232 tcc_declaration
, /* A declaration (also serving as variable refs). */
233 tcc_reference
, /* A reference to storage. */
234 tcc_comparison
, /* A comparison expression. */
235 tcc_unary
, /* A unary arithmetic expression. */
236 tcc_binary
, /* A binary arithmetic expression. */
237 tcc_statement
, /* A statement expression, which have side effects
238 but usually no interesting value. */
239 tcc_vl_exp
, /* A function call or other expression with a
240 variable-length operand vector. */
241 tcc_expression
/* Any other expression. */
244 /* OMP_CLAUSE codes. Do not reorder, as this is used to index into
245 the tables omp_clause_num_ops and omp_clause_code_name. */
246 enum omp_clause_code
{
247 /* Clause zero is special-cased inside the parser
248 (c_parser_omp_variable_list). */
249 OMP_CLAUSE_ERROR
= 0,
251 /* OpenACC/OpenMP clause: private (variable_list). */
254 /* OpenMP clause: shared (variable_list). */
257 /* OpenACC/OpenMP clause: firstprivate (variable_list). */
258 OMP_CLAUSE_FIRSTPRIVATE
,
260 /* OpenMP clause: lastprivate (variable_list). */
261 OMP_CLAUSE_LASTPRIVATE
,
263 /* OpenACC/OpenMP clause: reduction (operator:variable_list).
264 OMP_CLAUSE_REDUCTION_CODE: The tree_code of the operator.
265 Operand 1: OMP_CLAUSE_REDUCTION_INIT: Stmt-list to initialize the var.
266 Operand 2: OMP_CLAUSE_REDUCTION_MERGE: Stmt-list to merge private var
268 Operand 3: OMP_CLAUSE_REDUCTION_PLACEHOLDER: A dummy VAR_DECL
269 placeholder used in OMP_CLAUSE_REDUCTION_{INIT,MERGE}.
270 Operand 4: OMP_CLAUSE_REDUCTION_DECL_PLACEHOLDER: Another dummy
271 VAR_DECL placeholder, used like the above for C/C++ array
273 OMP_CLAUSE_REDUCTION
,
275 /* OpenMP clause: copyin (variable_list). */
278 /* OpenMP clause: copyprivate (variable_list). */
279 OMP_CLAUSE_COPYPRIVATE
,
281 /* OpenMP clause: linear (variable-list[:linear-step]). */
284 /* OpenMP clause: aligned (variable-list[:alignment]). */
287 /* OpenMP clause: depend ({in,out,inout}:variable-list). */
290 /* OpenMP clause: uniform (argument-list). */
293 /* OpenMP clause: to (extended-list).
294 Only when it appears in declare target. */
295 OMP_CLAUSE_TO_DECLARE
,
297 /* OpenMP clause: link (variable-list). */
300 /* OpenMP clause: from (variable-list). */
303 /* OpenMP clause: to (variable-list). */
306 /* OpenACC clauses: {copy, copyin, copyout, create, delete, deviceptr,
307 device, host (self), present, present_or_copy (pcopy), present_or_copyin
308 (pcopyin), present_or_copyout (pcopyout), present_or_create (pcreate)}
311 OpenMP clause: map ({alloc:,to:,from:,tofrom:,}variable-list). */
314 /* OpenACC clause: use_device (variable_list).
315 OpenMP clause: use_device_ptr (variable-list). */
316 OMP_CLAUSE_USE_DEVICE_PTR
,
318 /* OpenMP clause: is_device_ptr (variable-list). */
319 OMP_CLAUSE_IS_DEVICE_PTR
,
321 /* Internal structure to hold OpenACC cache directive's variable-list.
322 #pragma acc cache (variable-list). */
325 /* OpenACC clause: gang [(gang-argument-list)].
327 gang-argument-list: [gang-argument-list, ] gang-argument
328 gang-argument: [num:] integer-expression
329 | static: size-expression
330 size-expression: * | integer-expression. */
333 /* OpenACC clause: async [(integer-expression)]. */
336 /* OpenACC clause: wait [(integer-expression-list)]. */
339 /* OpenACC clause: auto. */
342 /* OpenACC clause: seq. */
345 /* Internal clause: temporary for combined loops expansion. */
346 OMP_CLAUSE__LOOPTEMP_
,
348 /* OpenACC/OpenMP clause: if (scalar-expression). */
351 /* OpenMP clause: num_threads (integer-expression). */
352 OMP_CLAUSE_NUM_THREADS
,
354 /* OpenMP clause: schedule. */
357 /* OpenMP clause: nowait. */
360 /* OpenMP clause: ordered [(constant-integer-expression)]. */
363 /* OpenACC/OpenMP clause: default. */
366 /* OpenACC/OpenMP clause: collapse (constant-integer-expression). */
369 /* OpenMP clause: untied. */
372 /* OpenMP clause: final (scalar-expression). */
375 /* OpenMP clause: mergeable. */
376 OMP_CLAUSE_MERGEABLE
,
378 /* OpenMP clause: device (integer-expression). */
381 /* OpenMP clause: dist_schedule (static[:chunk-size]). */
382 OMP_CLAUSE_DIST_SCHEDULE
,
384 /* OpenMP clause: inbranch. */
387 /* OpenMP clause: notinbranch. */
388 OMP_CLAUSE_NOTINBRANCH
,
390 /* OpenMP clause: num_teams(integer-expression). */
391 OMP_CLAUSE_NUM_TEAMS
,
393 /* OpenMP clause: thread_limit(integer-expression). */
394 OMP_CLAUSE_THREAD_LIMIT
,
396 /* OpenMP clause: proc_bind ({master,close,spread}). */
397 OMP_CLAUSE_PROC_BIND
,
399 /* OpenMP clause: safelen (constant-integer-expression). */
402 /* OpenMP clause: simdlen (constant-integer-expression). */
405 /* OpenMP clause: for. */
408 /* OpenMP clause: parallel. */
411 /* OpenMP clause: sections. */
414 /* OpenMP clause: taskgroup. */
415 OMP_CLAUSE_TASKGROUP
,
417 /* OpenMP clause: priority (integer-expression). */
420 /* OpenMP clause: grainsize (integer-expression). */
421 OMP_CLAUSE_GRAINSIZE
,
423 /* OpenMP clause: num_tasks (integer-expression). */
424 OMP_CLAUSE_NUM_TASKS
,
426 /* OpenMP clause: nogroup. */
429 /* OpenMP clause: threads. */
432 /* OpenMP clause: simd. */
435 /* OpenMP clause: hint (integer-expression). */
438 /* OpenMP clause: defaultmap (tofrom: scalar). */
439 OMP_CLAUSE_DEFAULTMAP
,
441 /* Internally used only clause, holding SIMD uid. */
442 OMP_CLAUSE__SIMDUID_
,
444 /* Internally used only clause, flag whether this is SIMT simd
448 /* Internally used only clause, holding _Cilk_for # of iterations
450 OMP_CLAUSE__CILK_FOR_COUNT_
,
452 /* OpenACC clause: independent. */
453 OMP_CLAUSE_INDEPENDENT
,
455 /* OpenACC clause: worker [( [num:] integer-expression)]. */
458 /* OpenACC clause: vector [( [length:] integer-expression)]. */
461 /* OpenACC clause: num_gangs (integer-expression). */
462 OMP_CLAUSE_NUM_GANGS
,
464 /* OpenACC clause: num_workers (integer-expression). */
465 OMP_CLAUSE_NUM_WORKERS
,
467 /* OpenACC clause: vector_length (integer-expression). */
468 OMP_CLAUSE_VECTOR_LENGTH
,
470 /* OpenACC clause: tile ( size-expr-list ). */
473 /* OpenMP internal-only clause to specify grid dimensions of a gridified
479 #define DEFTREESTRUCT(ENUM, NAME) ENUM,
480 enum tree_node_structure_enum
{
481 #include "treestruct.def"
486 enum omp_clause_schedule_kind
{
487 OMP_CLAUSE_SCHEDULE_STATIC
,
488 OMP_CLAUSE_SCHEDULE_DYNAMIC
,
489 OMP_CLAUSE_SCHEDULE_GUIDED
,
490 OMP_CLAUSE_SCHEDULE_AUTO
,
491 OMP_CLAUSE_SCHEDULE_RUNTIME
,
492 OMP_CLAUSE_SCHEDULE_CILKFOR
,
493 OMP_CLAUSE_SCHEDULE_MASK
= (1 << 3) - 1,
494 OMP_CLAUSE_SCHEDULE_MONOTONIC
= (1 << 3),
495 OMP_CLAUSE_SCHEDULE_NONMONOTONIC
= (1 << 4),
496 OMP_CLAUSE_SCHEDULE_LAST
= 2 * OMP_CLAUSE_SCHEDULE_NONMONOTONIC
- 1
499 enum omp_clause_default_kind
{
500 OMP_CLAUSE_DEFAULT_UNSPECIFIED
,
501 OMP_CLAUSE_DEFAULT_SHARED
,
502 OMP_CLAUSE_DEFAULT_NONE
,
503 OMP_CLAUSE_DEFAULT_PRIVATE
,
504 OMP_CLAUSE_DEFAULT_FIRSTPRIVATE
,
505 OMP_CLAUSE_DEFAULT_PRESENT
,
506 OMP_CLAUSE_DEFAULT_LAST
509 /* There is a TYPE_QUAL value for each type qualifier. They can be
510 combined by bitwise-or to form the complete set of qualifiers for a
513 TYPE_UNQUALIFIED
= 0x0,
514 TYPE_QUAL_CONST
= 0x1,
515 TYPE_QUAL_VOLATILE
= 0x2,
516 TYPE_QUAL_RESTRICT
= 0x4,
517 TYPE_QUAL_ATOMIC
= 0x8
520 /* Standard named or nameless data types of the C compiler. */
550 TI_INTEGER_MINUS_ONE
,
571 /* The _FloatN and _FloatNx types must be consecutive, and in the
572 same sequence as the corresponding complex types, which must also
573 be consecutive; _FloatN must come before _FloatNx; the order must
574 also be the same as in the floatn_nx_types array and the RID_*
575 values in c-common.h. This is so that iterations over these
576 types work as intended. */
578 TI_FLOATN_TYPE_FIRST
= TI_FLOAT16_TYPE
,
579 TI_FLOATN_NX_TYPE_FIRST
= TI_FLOAT16_TYPE
,
583 TI_FLOATN_TYPE_LAST
= TI_FLOAT128_TYPE
,
584 #define NUM_FLOATN_TYPES (TI_FLOATN_TYPE_LAST - TI_FLOATN_TYPE_FIRST + 1)
586 TI_FLOATNX_TYPE_FIRST
= TI_FLOAT32X_TYPE
,
589 TI_FLOATNX_TYPE_LAST
= TI_FLOAT128X_TYPE
,
590 TI_FLOATN_NX_TYPE_LAST
= TI_FLOAT128X_TYPE
,
591 #define NUM_FLOATNX_TYPES (TI_FLOATNX_TYPE_LAST - TI_FLOATNX_TYPE_FIRST + 1)
592 #define NUM_FLOATN_NX_TYPES (TI_FLOATN_NX_TYPE_LAST \
593 - TI_FLOATN_NX_TYPE_FIRST \
596 /* Put the complex types after their component types, so that in (sequential)
597 tree streaming we can assert that their component types have already been
598 handled (see tree-streamer.c:record_common_node). */
599 TI_COMPLEX_INTEGER_TYPE
,
600 TI_COMPLEX_FLOAT_TYPE
,
601 TI_COMPLEX_DOUBLE_TYPE
,
602 TI_COMPLEX_LONG_DOUBLE_TYPE
,
604 TI_COMPLEX_FLOAT16_TYPE
,
605 TI_COMPLEX_FLOATN_NX_TYPE_FIRST
= TI_COMPLEX_FLOAT16_TYPE
,
606 TI_COMPLEX_FLOAT32_TYPE
,
607 TI_COMPLEX_FLOAT64_TYPE
,
608 TI_COMPLEX_FLOAT128_TYPE
,
609 TI_COMPLEX_FLOAT32X_TYPE
,
610 TI_COMPLEX_FLOAT64X_TYPE
,
611 TI_COMPLEX_FLOAT128X_TYPE
,
615 TI_LONG_DOUBLE_PTR_TYPE
,
625 TI_VA_LIST_GPR_COUNTER_FIELD
,
626 TI_VA_LIST_FPR_COUNTER_FIELD
,
629 TI_CONST_TM_PTR_TYPE
,
631 TI_CONST_FENV_T_PTR_TYPE
,
632 TI_FEXCEPT_T_PTR_TYPE
,
633 TI_CONST_FEXCEPT_T_PTR_TYPE
,
634 TI_POINTER_SIZED_TYPE
,
636 TI_POINTER_BOUNDS_TYPE
,
641 TI_DFLOAT32_PTR_TYPE
,
642 TI_DFLOAT64_PTR_TYPE
,
643 TI_DFLOAT128_PTR_TYPE
,
656 TI_SAT_ULLFRACT_TYPE
,
672 TI_SAT_ULLACCUM_TYPE
,
718 TI_OPTIMIZATION_DEFAULT
,
719 TI_OPTIMIZATION_CURRENT
,
720 TI_TARGET_OPTION_DEFAULT
,
721 TI_TARGET_OPTION_CURRENT
,
722 TI_CURRENT_TARGET_PRAGMA
,
723 TI_CURRENT_OPTIMIZE_PRAGMA
,
728 /* An enumeration of the standard C integer types. These must be
729 ordered so that shorter types appear before longer ones, and so
730 that signed types appear before unsigned ones, for the correct
731 functioning of interpret_integer() in c-lex.c. */
732 enum integer_type_kind
{
743 itk_unsigned_long_long
,
757 /* A pointer-to-function member type looks like:
764 If __pfn is NULL, it is a NULL pointer-to-member-function.
766 (Because the vtable is always the first thing in the object, we
767 don't need its offset.) If the function is virtual, then PFN is
768 one plus twice the index into the vtable; otherwise, it is just a
769 pointer to the function.
771 Unfortunately, using the lowest bit of PFN doesn't work in
772 architectures that don't impose alignment requirements on function
773 addresses, or that use the lowest bit to tell one ISA from another,
774 for example. For such architectures, we use the lowest bit of
775 DELTA instead of the lowest bit of the PFN, and DELTA will be
777 enum ptrmemfunc_vbit_where_t
{
778 ptrmemfunc_vbit_in_pfn
,
779 ptrmemfunc_vbit_in_delta
782 /* Flags that may be passed in the third argument of decl_attributes, and
783 to handler functions for attributes. */
784 enum attribute_flags
{
785 /* The type passed in is the type of a DECL, and any attributes that
786 should be passed in again to be applied to the DECL rather than the
787 type should be returned. */
788 ATTR_FLAG_DECL_NEXT
= 1,
789 /* The type passed in is a function return type, and any attributes that
790 should be passed in again to be applied to the function type rather
791 than the return type should be returned. */
792 ATTR_FLAG_FUNCTION_NEXT
= 2,
793 /* The type passed in is an array element type, and any attributes that
794 should be passed in again to be applied to the array type rather
795 than the element type should be returned. */
796 ATTR_FLAG_ARRAY_NEXT
= 4,
797 /* The type passed in is a structure, union or enumeration type being
798 created, and should be modified in place. */
799 ATTR_FLAG_TYPE_IN_PLACE
= 8,
800 /* The attributes are being applied by default to a library function whose
801 name indicates known behavior, and should be silently ignored if they
802 are not in fact compatible with the function type. */
803 ATTR_FLAG_BUILT_IN
= 16,
804 /* A given attribute has been parsed as a C++-11 attribute. */
808 /* Types used to represent sizes. */
809 enum size_type_kind
{
810 stk_sizetype
, /* Normal representation of sizes in bytes. */
811 stk_ssizetype
, /* Signed representation of sizes in bytes. */
812 stk_bitsizetype
, /* Normal representation of sizes in bits. */
813 stk_sbitsizetype
, /* Signed representation of sizes in bits. */
817 enum operand_equal_flag
{
820 OEP_MATCH_SIDE_EFFECTS
= 4,
822 /* Internal within operand_equal_p: */
823 OEP_NO_HASH_CHECK
= 16,
824 /* Internal within inchash::add_expr: */
826 /* Makes operand_equal_p handle more expressions: */
827 OEP_LEXICOGRAPHIC
= 64
830 /* Enum and arrays used for tree allocation stats.
831 Keep in sync with tree.c:tree_node_kind_names. */
832 enum tree_node_kind
{
852 enum annot_expr_kind
{
853 annot_expr_ivdep_kind
,
854 annot_expr_no_vector_kind
,
855 annot_expr_vector_kind
,
859 /*---------------------------------------------------------------------------
861 ---------------------------------------------------------------------------*/
862 /* When processing aliases at the symbol table level, we need the
863 declaration of target. For this reason we need to queue aliases and
864 process them after all declarations has been produced. */
865 struct GTY(()) alias_pair
{
870 /* An initialization priority. */
871 typedef unsigned short priority_type
;
873 /* The type of a callback function for walking over tree structure. */
874 typedef tree (*walk_tree_fn
) (tree
*, int *, void *);
876 /* The type of a callback function that represents a custom walk_tree. */
877 typedef tree (*walk_tree_lh
) (tree
*, int *, tree (*) (tree
*, int *, void *),
878 void *, hash_set
<tree
> *);
881 /*---------------------------------------------------------------------------
883 ---------------------------------------------------------------------------*/
884 /* A tree node can represent a data type, a variable, an expression
885 or a statement. Each node has a TREE_CODE which says what kind of
886 thing it represents. Some common codes are:
887 INTEGER_TYPE -- represents a type of integers.
888 ARRAY_TYPE -- represents a type of pointer.
889 VAR_DECL -- represents a declared variable.
890 INTEGER_CST -- represents a constant integer value.
891 PLUS_EXPR -- represents a sum (an expression).
893 As for the contents of a tree node: there are some fields
894 that all nodes share. Each TREE_CODE has various special-purpose
895 fields as well. The fields of a node are never accessed directly,
896 always through accessor macros. */
898 /* Every kind of tree node starts with this structure,
899 so all nodes have these fields.
901 See the accessor macros, defined below, for documentation of the
902 fields, and the table below which connects the fields and the
905 struct GTY(()) tree_base
{
906 ENUM_BITFIELD(tree_code
) code
: 16;
908 unsigned side_effects_flag
: 1;
909 unsigned constant_flag
: 1;
910 unsigned addressable_flag
: 1;
911 unsigned volatile_flag
: 1;
912 unsigned readonly_flag
: 1;
913 unsigned asm_written_flag
: 1;
914 unsigned nowarning_flag
: 1;
915 unsigned visited
: 1;
917 unsigned used_flag
: 1;
918 unsigned nothrow_flag
: 1;
919 unsigned static_flag
: 1;
920 unsigned public_flag
: 1;
921 unsigned private_flag
: 1;
922 unsigned protected_flag
: 1;
923 unsigned deprecated_flag
: 1;
924 unsigned default_def_flag
: 1;
927 /* The bits in the following structure should only be used with
928 accessor macros that constrain inputs with tree checking. */
930 unsigned lang_flag_0
: 1;
931 unsigned lang_flag_1
: 1;
932 unsigned lang_flag_2
: 1;
933 unsigned lang_flag_3
: 1;
934 unsigned lang_flag_4
: 1;
935 unsigned lang_flag_5
: 1;
936 unsigned lang_flag_6
: 1;
937 unsigned saturating_flag
: 1;
939 unsigned unsigned_flag
: 1;
940 unsigned packed_flag
: 1;
941 unsigned user_align
: 1;
942 unsigned nameless_flag
: 1;
943 unsigned atomic_flag
: 1;
948 /* This field is only used with TREE_TYPE nodes; the only reason it is
949 present in tree_base instead of tree_type is to save space. The size
950 of the field must be large enough to hold addr_space_t values. */
951 unsigned address_space
: 8;
954 /* The following fields are present in tree_base to save space. The
955 nodes using them do not require any of the flags above and so can
956 make better use of the 4-byte sized word. */
958 /* The number of HOST_WIDE_INTs in an INTEGER_CST. */
960 /* The number of HOST_WIDE_INTs if the INTEGER_CST is accessed in
961 its native precision. */
962 unsigned char unextended
;
964 /* The number of HOST_WIDE_INTs if the INTEGER_CST is extended to
965 wider precisions based on its TYPE_SIGN. */
966 unsigned char extended
;
968 /* The number of HOST_WIDE_INTs if the INTEGER_CST is accessed in
969 offset_int precision, with smaller integers being extended
970 according to their TYPE_SIGN. This is equal to one of the two
971 fields above but is cached for speed. */
972 unsigned char offset
;
975 /* VEC length. This field is only used with TREE_VEC. */
978 /* Number of elements. This field is only used with VECTOR_CST. */
981 /* SSA version number. This field is only used with SSA_NAME. */
982 unsigned int version
;
984 /* Internal function code. */
985 enum internal_fn ifn
;
987 /* The following two fields are used for MEM_REF and TARGET_MEM_REF
988 expression trees and specify known data non-dependences. For
989 two memory references in a function they are known to not
990 alias if dependence_info.clique are equal and dependence_info.base
993 unsigned short clique
;
999 /* The following table lists the uses of each of the above flags and
1000 for which types of nodes they are defined.
1005 VAR_DECL, PARM_DECL, RESULT_DECL, FUNCTION_DECL, LABEL_DECL
1008 CONSTRUCTOR, IDENTIFIER_NODE
1011 CALL_EXPR_TAILCALL in
1017 PREDICT_EXPR_OUTCOME in
1023 VAR_DECL, FUNCTION_DECL
1026 TREE_NO_TRAMPOLINE in
1032 TREE_SYMBOL_REFERENCED in
1036 TARGET_EXPR, WITH_CLEANUP_EXPR
1038 TRY_CATCH_IS_CLEANUP in
1044 TYPE_REF_CAN_ALIAS_ALL in
1045 POINTER_TYPE, REFERENCE_TYPE
1053 TRANSACTION_EXPR_OUTER in
1056 SSA_NAME_ANTI_RANGE_P in
1065 INTEGER_CST, REAL_CST, COMPLEX_CST, VECTOR_CST
1068 VAR_DECL, FUNCTION_DECL
1071 CONSTRUCTOR_NO_CLEARING in
1077 CALL_EXPR_VA_ARG_PACK in
1080 TYPE_CACHED_VALUES_P in
1083 SAVE_EXPR_RESOLVED_P in
1086 OMP_CLAUSE_LASTPRIVATE_FIRSTPRIVATE in
1087 OMP_CLAUSE_LASTPRIVATE
1089 OMP_CLAUSE_PRIVATE_DEBUG in
1092 OMP_CLAUSE_LINEAR_NO_COPYIN in
1095 OMP_CLAUSE_MAP_ZERO_BIAS_ARRAY_SECTION in
1098 OMP_CLAUSE_REDUCTION_OMP_ORIG_REF in
1099 OMP_CLAUSE_REDUCTION
1101 TRANSACTION_EXPR_RELAXED in
1104 FALLTHROUGH_LABEL_P in
1107 SSA_NAME_IS_VIRTUAL_OPERAND in
1115 CALL_EXPR_RETURN_SLOT_OPT in
1121 OMP_PARALLEL_COMBINED in
1124 OMP_ATOMIC_SEQ_CST in
1127 OMP_CLAUSE_PRIVATE_OUTER_REF in
1130 OMP_CLAUSE_LINEAR_NO_COPYOUT in
1133 TYPE_REF_IS_RVALUE in
1145 CALL_FROM_THUNK_P and
1146 CALL_ALLOCA_FOR_VAR_P in
1149 OMP_CLAUSE_LINEAR_VARIABLE_STRIDE in
1154 TREE_SIDE_EFFECTS in
1164 TREE_THIS_VOLATILE in
1187 TYPE_SIZES_GIMPLIFIED in
1201 VAR_DECL, FUNCTION_DECL, TYPE_DECL
1202 RECORD_TYPE, UNION_TYPE, QUAL_UNION_TYPE
1205 SSA_NAME_OCCURS_IN_ABNORMAL_PHI in
1226 INDIRECT_REF, MEM_REF, TARGET_MEM_REF, ARRAY_REF, ARRAY_RANGE_REF
1228 SSA_NAME_IN_FREE_LIST in
1240 IDENTIFIER_TRANSPARENT_ALIAS in
1246 all trees (used liberally by many passes)
1250 TYPE_REVERSE_STORAGE_ORDER in
1251 RECORD_TYPE, UNION_TYPE, QUAL_UNION_TYPE, ARRAY_TYPE
1256 VAR_DECL_IS_VIRTUAL_OPERAND in
1271 RECORD_TYPE, UNION_TYPE and QUAL_UNION_TYPE
1273 TYPE_VECTOR_OPAQUE in
1276 SSA_NAME_IS_DEFAULT_DEF in
1279 DECL_NONLOCAL_FRAME in
1282 REF_REVERSE_STORAGE_ORDER in
1283 BIT_FIELD_REF, MEM_REF
1285 FUNC_ADDR_BY_DESCRIPTOR in
1288 CALL_EXPR_BY_DESCRIPTOR in
1292 struct GTY(()) tree_typed
{
1293 struct tree_base base
;
1297 struct GTY(()) tree_common
{
1298 struct tree_typed typed
;
1302 struct GTY(()) tree_int_cst
{
1303 struct tree_typed typed
;
1304 HOST_WIDE_INT val
[1];
1308 struct GTY(()) tree_real_cst
{
1309 struct tree_typed typed
;
1310 struct real_value
* real_cst_ptr
;
1313 struct GTY(()) tree_fixed_cst
{
1314 struct tree_typed typed
;
1315 struct fixed_value
* fixed_cst_ptr
;
1318 struct GTY(()) tree_string
{
1319 struct tree_typed typed
;
1324 struct GTY(()) tree_complex
{
1325 struct tree_typed typed
;
1330 struct GTY(()) tree_vector
{
1331 struct tree_typed typed
;
1332 tree
GTY ((length ("VECTOR_CST_NELTS ((tree) &%h)"))) elts
[1];
1335 struct GTY(()) tree_identifier
{
1336 struct tree_common common
;
1337 struct ht_identifier id
;
1340 struct GTY(()) tree_list
{
1341 struct tree_common common
;
1346 struct GTY(()) tree_vec
{
1347 struct tree_common common
;
1348 tree
GTY ((length ("TREE_VEC_LENGTH ((tree)&%h)"))) a
[1];
1351 /* A single element of a CONSTRUCTOR. VALUE holds the actual value of the
1352 element. INDEX can optionally design the position of VALUE: in arrays,
1353 it is the index where VALUE has to be placed; in structures, it is the
1354 FIELD_DECL of the member. */
1355 struct GTY(()) constructor_elt
{
1360 struct GTY(()) tree_constructor
{
1361 struct tree_typed typed
;
1362 vec
<constructor_elt
, va_gc
> *elts
;
1365 enum omp_clause_depend_kind
1367 OMP_CLAUSE_DEPEND_IN
,
1368 OMP_CLAUSE_DEPEND_OUT
,
1369 OMP_CLAUSE_DEPEND_INOUT
,
1370 OMP_CLAUSE_DEPEND_SOURCE
,
1371 OMP_CLAUSE_DEPEND_SINK
,
1372 OMP_CLAUSE_DEPEND_LAST
1375 enum omp_clause_proc_bind_kind
1377 /* Numbers should match omp_proc_bind_t enum in omp.h. */
1378 OMP_CLAUSE_PROC_BIND_FALSE
= 0,
1379 OMP_CLAUSE_PROC_BIND_TRUE
= 1,
1380 OMP_CLAUSE_PROC_BIND_MASTER
= 2,
1381 OMP_CLAUSE_PROC_BIND_CLOSE
= 3,
1382 OMP_CLAUSE_PROC_BIND_SPREAD
= 4,
1383 OMP_CLAUSE_PROC_BIND_LAST
1386 enum omp_clause_linear_kind
1388 OMP_CLAUSE_LINEAR_DEFAULT
,
1389 OMP_CLAUSE_LINEAR_REF
,
1390 OMP_CLAUSE_LINEAR_VAL
,
1391 OMP_CLAUSE_LINEAR_UVAL
1394 struct GTY(()) tree_exp
{
1395 struct tree_typed typed
;
1397 tree
GTY ((special ("tree_exp"),
1398 desc ("TREE_CODE ((tree) &%0)")))
1402 /* Immediate use linking structure. This structure is used for maintaining
1403 a doubly linked list of uses of an SSA_NAME. */
1404 struct GTY(()) ssa_use_operand_t
{
1405 struct ssa_use_operand_t
* GTY((skip(""))) prev
;
1406 struct ssa_use_operand_t
* GTY((skip(""))) next
;
1407 /* Immediate uses for a given SSA name are maintained as a cyclic
1408 list. To recognize the root of this list, the location field
1409 needs to point to the original SSA name. Since statements and
1410 SSA names are of different data types, we need this union. See
1411 the explanation in struct imm_use_iterator. */
1412 union { gimple
*stmt
; tree ssa_name
; } GTY((skip(""))) loc
;
1413 tree
*GTY((skip(""))) use
;
1416 struct GTY(()) tree_ssa_name
{
1417 struct tree_typed typed
;
1419 /* _DECL wrapped by this SSA name. */
1422 /* Statement that defines this SSA name. */
1425 /* Value range information. */
1426 union ssa_name_info_type
{
1427 /* Pointer attributes used for alias analysis. */
1428 struct GTY ((tag ("0"))) ptr_info_def
*ptr_info
;
1429 /* Value range attributes used for zero/sign extension elimination. */
1430 struct GTY ((tag ("1"))) range_info_def
*range_info
;
1431 } GTY ((desc ("%1.typed.type ?" \
1432 "!POINTER_TYPE_P (TREE_TYPE ((tree)&%1)) : 2"))) info
;
1434 /* Immediate uses list for this SSA_NAME. */
1435 struct ssa_use_operand_t imm_uses
;
1438 struct GTY(()) phi_arg_d
{
1439 /* imm_use MUST be the first element in struct because we do some
1440 pointer arithmetic with it. See phi_arg_index_from_use. */
1441 struct ssa_use_operand_t imm_use
;
1446 struct GTY(()) tree_omp_clause
{
1447 struct tree_common common
;
1449 enum omp_clause_code code
;
1450 union omp_clause_subcode
{
1451 enum omp_clause_default_kind default_kind
;
1452 enum omp_clause_schedule_kind schedule_kind
;
1453 enum omp_clause_depend_kind depend_kind
;
1454 /* See include/gomp-constants.h for enum gomp_map_kind's values. */
1455 unsigned int map_kind
;
1456 enum omp_clause_proc_bind_kind proc_bind_kind
;
1457 enum tree_code reduction_code
;
1458 enum omp_clause_linear_kind linear_kind
;
1459 enum tree_code if_modifier
;
1460 /* The dimension a OMP_CLAUSE__GRIDDIM_ clause of a gridified target
1461 construct describes. */
1462 unsigned int dimension
;
1463 } GTY ((skip
)) subcode
;
1465 /* The gimplification of OMP_CLAUSE_REDUCTION_{INIT,MERGE} for omp-low's
1467 gimple_seq gimple_reduction_init
;
1468 gimple_seq gimple_reduction_merge
;
1470 tree
GTY ((length ("omp_clause_num_ops[OMP_CLAUSE_CODE ((tree)&%h)]")))
1474 struct GTY(()) tree_block
{
1475 struct tree_base base
;
1478 unsigned abstract_flag
: 1;
1479 unsigned block_num
: 31;
1482 location_t end_locus
;
1485 vec
<tree
, va_gc
> *nonlocalized_vars
;
1489 tree abstract_origin
;
1490 tree fragment_origin
;
1491 tree fragment_chain
;
1493 /* Pointer to the DWARF lexical block. */
1494 struct die_struct
*die
;
1497 struct GTY(()) tree_type_common
{
1498 struct tree_common common
;
1504 unsigned int precision
: 10;
1505 unsigned no_force_blk_flag
: 1;
1506 unsigned needs_constructing_flag
: 1;
1507 unsigned transparent_aggr_flag
: 1;
1508 unsigned restrict_flag
: 1;
1509 unsigned contains_placeholder_bits
: 2;
1511 ENUM_BITFIELD(machine_mode
) mode
: 8;
1513 unsigned string_flag
: 1;
1514 unsigned lang_flag_0
: 1;
1515 unsigned lang_flag_1
: 1;
1516 unsigned lang_flag_2
: 1;
1517 unsigned lang_flag_3
: 1;
1518 unsigned lang_flag_4
: 1;
1519 unsigned lang_flag_5
: 1;
1520 unsigned lang_flag_6
: 1;
1521 unsigned lang_flag_7
: 1;
1523 /* TYPE_ALIGN in log2; this has to be large enough to hold values
1524 of the maximum of BIGGEST_ALIGNMENT and MAX_OFILE_ALIGNMENT,
1525 the latter being usually the larger. For ELF it is 8<<28,
1526 so we need to store the value 32 (not 31, as we need the zero
1527 as well), hence six bits. */
1529 unsigned warn_if_not_align
: 6;
1530 unsigned typeless_storage
: 1;
1531 unsigned spare
: 18;
1533 alias_set_type alias_set
;
1536 union tree_type_symtab
{
1537 int GTY ((tag ("TYPE_SYMTAB_IS_ADDRESS"))) address
;
1538 const char * GTY ((tag ("TYPE_SYMTAB_IS_POINTER"))) pointer
;
1539 struct die_struct
* GTY ((tag ("TYPE_SYMTAB_IS_DIE"))) die
;
1540 } GTY ((desc ("debug_hooks->tree_type_symtab_field"))) symtab
;
1548 struct GTY(()) tree_type_with_lang_specific
{
1549 struct tree_type_common common
;
1550 /* Points to a structure whose details depend on the language in use. */
1551 struct lang_type
*lang_specific
;
1554 struct GTY(()) tree_type_non_common
{
1555 struct tree_type_with_lang_specific with_lang_specific
;
1562 struct GTY (()) tree_binfo
{
1563 struct tree_common common
;
1569 vec
<tree
, va_gc
> *base_accesses
;
1575 vec
<tree
, va_gc
> base_binfos
;
1578 struct GTY(()) tree_decl_minimal
{
1579 struct tree_common common
;
1586 struct GTY(()) tree_decl_common
{
1587 struct tree_decl_minimal common
;
1590 ENUM_BITFIELD(machine_mode
) mode
: 8;
1592 unsigned nonlocal_flag
: 1;
1593 unsigned virtual_flag
: 1;
1594 unsigned ignored_flag
: 1;
1595 unsigned abstract_flag
: 1;
1596 unsigned artificial_flag
: 1;
1597 unsigned preserve_flag
: 1;
1598 unsigned debug_expr_is_from
: 1;
1600 unsigned lang_flag_0
: 1;
1601 unsigned lang_flag_1
: 1;
1602 unsigned lang_flag_2
: 1;
1603 unsigned lang_flag_3
: 1;
1604 unsigned lang_flag_4
: 1;
1605 unsigned lang_flag_5
: 1;
1606 unsigned lang_flag_6
: 1;
1607 unsigned lang_flag_7
: 1;
1608 unsigned lang_flag_8
: 1;
1610 /* In VAR_DECL and PARM_DECL, this is DECL_REGISTER. */
1611 unsigned decl_flag_0
: 1;
1612 /* In FIELD_DECL, this is DECL_BIT_FIELD
1613 In VAR_DECL and FUNCTION_DECL, this is DECL_EXTERNAL.
1614 In TYPE_DECL, this is TYPE_DECL_SUPPRESS_DEBUG. */
1615 unsigned decl_flag_1
: 1;
1616 /* In FIELD_DECL, this is DECL_NONADDRESSABLE_P
1617 In VAR_DECL, PARM_DECL and RESULT_DECL, this is
1618 DECL_HAS_VALUE_EXPR_P. */
1619 unsigned decl_flag_2
: 1;
1621 unsigned decl_flag_3
: 1;
1622 /* Logically, these two would go in a theoretical base shared by var and
1624 unsigned gimple_reg_flag
: 1;
1625 /* In VAR_DECL, PARM_DECL and RESULT_DECL, this is DECL_BY_REFERENCE. */
1626 unsigned decl_by_reference_flag
: 1;
1627 /* In a VAR_DECL and PARM_DECL, this is DECL_READ_P. */
1628 unsigned decl_read_flag
: 1;
1629 /* In a VAR_DECL or RESULT_DECL, this is DECL_NONSHAREABLE. */
1630 unsigned decl_nonshareable_flag
: 1;
1632 /* DECL_OFFSET_ALIGN, used only for FIELD_DECLs. */
1633 unsigned int off_align
: 6;
1635 /* DECL_ALIGN. It should have the same size as TYPE_ALIGN. */
1636 unsigned int align
: 6;
1638 /* DECL_WARN_IF_NOT_ALIGN. It should have the same size as
1639 TYPE_WARN_IF_NOT_ALIGN. */
1640 unsigned int warn_if_not_align
: 6;
1642 /* 14 bits unused. */
1644 /* UID for points-to sets, stable over copying from inlining. */
1645 unsigned int pt_uid
;
1650 tree abstract_origin
;
1652 /* Points to a structure whose details depend on the language in use. */
1653 struct lang_decl
*lang_specific
;
1656 struct GTY(()) tree_decl_with_rtl
{
1657 struct tree_decl_common common
;
1661 struct GTY(()) tree_field_decl
{
1662 struct tree_decl_common common
;
1665 tree bit_field_type
;
1671 struct GTY(()) tree_label_decl
{
1672 struct tree_decl_with_rtl common
;
1674 int eh_landing_pad_nr
;
1677 struct GTY(()) tree_result_decl
{
1678 struct tree_decl_with_rtl common
;
1681 struct GTY(()) tree_const_decl
{
1682 struct tree_decl_common common
;
1685 struct GTY(()) tree_parm_decl
{
1686 struct tree_decl_with_rtl common
;
1690 struct GTY(()) tree_decl_with_vis
{
1691 struct tree_decl_with_rtl common
;
1692 tree assembler_name
;
1693 struct symtab_node
*symtab_node
;
1695 /* Belong to VAR_DECL exclusively. */
1696 unsigned defer_output
: 1;
1697 unsigned hard_register
: 1;
1698 unsigned common_flag
: 1;
1699 unsigned in_text_section
: 1;
1700 unsigned in_constant_pool
: 1;
1701 unsigned dllimport_flag
: 1;
1702 /* Don't belong to VAR_DECL exclusively. */
1703 unsigned weak_flag
: 1;
1705 unsigned seen_in_bind_expr
: 1;
1706 unsigned comdat_flag
: 1;
1707 /* Used for FUNCTION_DECL, VAR_DECL and in C++ for TYPE_DECL. */
1708 ENUM_BITFIELD(symbol_visibility
) visibility
: 2;
1709 unsigned visibility_specified
: 1;
1711 /* Belong to FUNCTION_DECL exclusively. */
1712 unsigned init_priority_p
: 1;
1713 /* Used by C++ only. Might become a generic decl flag. */
1714 unsigned shadowed_for_var_p
: 1;
1715 /* Belong to FUNCTION_DECL exclusively. */
1716 unsigned cxx_constructor
: 1;
1717 /* Belong to FUNCTION_DECL exclusively. */
1718 unsigned cxx_destructor
: 1;
1719 /* Belong to FUNCTION_DECL exclusively. */
1721 /* Belong to FUNCTION_DECL exclusively. */
1722 unsigned regdecl_flag
: 1;
1723 /* 14 unused bits. */
1726 struct GTY(()) tree_var_decl
{
1727 struct tree_decl_with_vis common
;
1730 struct GTY(()) tree_decl_non_common
{
1731 struct tree_decl_with_vis common
;
1732 /* Almost all FE's use this. */
1736 /* FUNCTION_DECL inherits from DECL_NON_COMMON because of the use of the
1737 arguments/result/saved_tree fields by front ends. It was either inherit
1738 FUNCTION_DECL from non_common, or inherit non_common from FUNCTION_DECL,
1739 which seemed a bit strange. */
1741 struct GTY(()) tree_function_decl
{
1742 struct tree_decl_non_common common
;
1746 /* Arguments of the function. */
1748 /* The personality function. Used for stack unwinding. */
1751 /* Function specific options that are used by this function. */
1752 tree function_specific_target
; /* target options */
1753 tree function_specific_optimization
; /* optimization options */
1755 /* Generic function body. */
1757 /* Index within a virtual table. */
1760 /* In a FUNCTION_DECL for which DECL_BUILT_IN holds, this is
1761 DECL_FUNCTION_CODE. Otherwise unused.
1762 ??? The bitfield needs to be able to hold all target function
1764 ENUM_BITFIELD(built_in_function
) function_code
: 12;
1765 ENUM_BITFIELD(built_in_class
) built_in_class
: 2;
1767 unsigned static_ctor_flag
: 1;
1768 unsigned static_dtor_flag
: 1;
1770 unsigned uninlinable
: 1;
1771 unsigned possibly_inlined
: 1;
1772 unsigned novops_flag
: 1;
1773 unsigned returns_twice_flag
: 1;
1774 unsigned malloc_flag
: 1;
1775 unsigned operator_new_flag
: 1;
1776 unsigned declared_inline_flag
: 1;
1777 unsigned no_inline_warning_flag
: 1;
1779 unsigned no_instrument_function_entry_exit
: 1;
1780 unsigned no_limit_stack
: 1;
1781 unsigned disregard_inline_limits
: 1;
1782 unsigned pure_flag
: 1;
1783 unsigned looping_const_or_pure_flag
: 1;
1784 unsigned has_debug_args_flag
: 1;
1785 unsigned tm_clone_flag
: 1;
1786 unsigned versioned_function
: 1;
1790 struct GTY(()) tree_translation_unit_decl
{
1791 struct tree_decl_common common
;
1792 /* Source language of this translation unit. Used for DWARF output. */
1793 const char * GTY((skip(""))) language
;
1794 /* TODO: Non-optimization used to build this translation unit. */
1795 /* TODO: Root of a partial DWARF tree for global types and decls. */
1798 struct GTY(()) tree_type_decl
{
1799 struct tree_decl_non_common common
;
1803 struct GTY ((chain_next ("%h.next"), chain_prev ("%h.prev"))) tree_statement_list_node
1805 struct tree_statement_list_node
*prev
;
1806 struct tree_statement_list_node
*next
;
1810 struct GTY(()) tree_statement_list
1812 struct tree_typed typed
;
1813 struct tree_statement_list_node
*head
;
1814 struct tree_statement_list_node
*tail
;
1818 /* Optimization options used by a function. */
1820 struct GTY(()) tree_optimization_option
{
1821 struct tree_base base
;
1823 /* The optimization options used by the user. */
1824 struct cl_optimization
*opts
;
1826 /* Target optabs for this set of optimization options. This is of
1827 type `struct target_optabs *'. */
1828 void *GTY ((atomic
)) optabs
;
1830 /* The value of this_target_optabs against which the optabs above were
1832 struct target_optabs
*GTY ((skip
)) base_optabs
;
1835 /* Forward declaration, defined in target-globals.h. */
1837 struct GTY(()) target_globals
;
1839 /* Target options used by a function. */
1841 struct GTY(()) tree_target_option
{
1842 struct tree_base base
;
1844 /* Target globals for the corresponding target option. */
1845 struct target_globals
*globals
;
1847 /* The optimization options used by the user. */
1848 struct cl_target_option
*opts
;
1851 /* Define the overall contents of a tree node.
1852 It may be any of the structures declared above
1853 for various types of node. */
1854 union GTY ((ptr_alias (union lang_tree_node
),
1855 desc ("tree_node_structure (&%h)"), variable_size
)) tree_node
{
1856 struct tree_base
GTY ((tag ("TS_BASE"))) base
;
1857 struct tree_typed
GTY ((tag ("TS_TYPED"))) typed
;
1858 struct tree_common
GTY ((tag ("TS_COMMON"))) common
;
1859 struct tree_int_cst
GTY ((tag ("TS_INT_CST"))) int_cst
;
1860 struct tree_real_cst
GTY ((tag ("TS_REAL_CST"))) real_cst
;
1861 struct tree_fixed_cst
GTY ((tag ("TS_FIXED_CST"))) fixed_cst
;
1862 struct tree_vector
GTY ((tag ("TS_VECTOR"))) vector
;
1863 struct tree_string
GTY ((tag ("TS_STRING"))) string
;
1864 struct tree_complex
GTY ((tag ("TS_COMPLEX"))) complex;
1865 struct tree_identifier
GTY ((tag ("TS_IDENTIFIER"))) identifier
;
1866 struct tree_decl_minimal
GTY((tag ("TS_DECL_MINIMAL"))) decl_minimal
;
1867 struct tree_decl_common
GTY ((tag ("TS_DECL_COMMON"))) decl_common
;
1868 struct tree_decl_with_rtl
GTY ((tag ("TS_DECL_WRTL"))) decl_with_rtl
;
1869 struct tree_decl_non_common
GTY ((tag ("TS_DECL_NON_COMMON")))
1871 struct tree_parm_decl
GTY ((tag ("TS_PARM_DECL"))) parm_decl
;
1872 struct tree_decl_with_vis
GTY ((tag ("TS_DECL_WITH_VIS"))) decl_with_vis
;
1873 struct tree_var_decl
GTY ((tag ("TS_VAR_DECL"))) var_decl
;
1874 struct tree_field_decl
GTY ((tag ("TS_FIELD_DECL"))) field_decl
;
1875 struct tree_label_decl
GTY ((tag ("TS_LABEL_DECL"))) label_decl
;
1876 struct tree_result_decl
GTY ((tag ("TS_RESULT_DECL"))) result_decl
;
1877 struct tree_const_decl
GTY ((tag ("TS_CONST_DECL"))) const_decl
;
1878 struct tree_type_decl
GTY ((tag ("TS_TYPE_DECL"))) type_decl
;
1879 struct tree_function_decl
GTY ((tag ("TS_FUNCTION_DECL"))) function_decl
;
1880 struct tree_translation_unit_decl
GTY ((tag ("TS_TRANSLATION_UNIT_DECL")))
1881 translation_unit_decl
;
1882 struct tree_type_common
GTY ((tag ("TS_TYPE_COMMON"))) type_common
;
1883 struct tree_type_with_lang_specific
GTY ((tag ("TS_TYPE_WITH_LANG_SPECIFIC")))
1884 type_with_lang_specific
;
1885 struct tree_type_non_common
GTY ((tag ("TS_TYPE_NON_COMMON")))
1887 struct tree_list
GTY ((tag ("TS_LIST"))) list
;
1888 struct tree_vec
GTY ((tag ("TS_VEC"))) vec
;
1889 struct tree_exp
GTY ((tag ("TS_EXP"))) exp
;
1890 struct tree_ssa_name
GTY ((tag ("TS_SSA_NAME"))) ssa_name
;
1891 struct tree_block
GTY ((tag ("TS_BLOCK"))) block
;
1892 struct tree_binfo
GTY ((tag ("TS_BINFO"))) binfo
;
1893 struct tree_statement_list
GTY ((tag ("TS_STATEMENT_LIST"))) stmt_list
;
1894 struct tree_constructor
GTY ((tag ("TS_CONSTRUCTOR"))) constructor
;
1895 struct tree_omp_clause
GTY ((tag ("TS_OMP_CLAUSE"))) omp_clause
;
1896 struct tree_optimization_option
GTY ((tag ("TS_OPTIMIZATION"))) optimization
;
1897 struct tree_target_option
GTY ((tag ("TS_TARGET_OPTION"))) target_option
;
1900 /* Structure describing an attribute and a function to handle it. */
1901 struct attribute_spec
{
1902 /* The name of the attribute (without any leading or trailing __),
1903 or NULL to mark the end of a table of attributes. */
1905 /* The minimum length of the list of arguments of the attribute. */
1907 /* The maximum length of the list of arguments of the attribute
1908 (-1 for no maximum). */
1910 /* Whether this attribute requires a DECL. If it does, it will be passed
1911 from types of DECLs, function return types and array element types to
1912 the DECLs, function types and array types respectively; but when
1913 applied to a type in any other circumstances, it will be ignored with
1914 a warning. (If greater control is desired for a given attribute,
1915 this should be false, and the flags argument to the handler may be
1916 used to gain greater control in that case.) */
1918 /* Whether this attribute requires a type. If it does, it will be passed
1919 from a DECL to the type of that DECL. */
1921 /* Whether this attribute requires a function (or method) type. If it does,
1922 it will be passed from a function pointer type to the target type,
1923 and from a function return type (which is not itself a function
1924 pointer type) to the function type. */
1925 bool function_type_required
;
1926 /* Function to handle this attribute. NODE points to the node to which
1927 the attribute is to be applied. If a DECL, it should be modified in
1928 place; if a TYPE, a copy should be created. NAME is the name of the
1929 attribute (possibly with leading or trailing __). ARGS is the TREE_LIST
1930 of the arguments (which may be NULL). FLAGS gives further information
1931 about the context of the attribute. Afterwards, the attributes will
1932 be added to the DECL_ATTRIBUTES or TYPE_ATTRIBUTES, as appropriate,
1933 unless *NO_ADD_ATTRS is set to true (which should be done on error,
1934 as well as in any other cases when the attributes should not be added
1935 to the DECL or TYPE). Depending on FLAGS, any attributes to be
1936 applied to another type or DECL later may be returned;
1937 otherwise the return value should be NULL_TREE. This pointer may be
1938 NULL if no special handling is required beyond the checks implied
1939 by the rest of this structure. */
1940 tree (*handler
) (tree
*node
, tree name
, tree args
,
1941 int flags
, bool *no_add_attrs
);
1942 /* Specifies if attribute affects type's identity. */
1943 bool affects_type_identity
;
1946 /* These functions allow a front-end to perform a manual layout of a
1947 RECORD_TYPE. (For instance, if the placement of subsequent fields
1948 depends on the placement of fields so far.) Begin by calling
1949 start_record_layout. Then, call place_field for each of the
1950 fields. Then, call finish_record_layout. See layout_type for the
1951 default way in which these functions are used. */
1952 typedef struct record_layout_info_s
{
1953 /* The RECORD_TYPE that we are laying out. */
1955 /* The offset into the record so far, in bytes, not including bits in
1958 /* The last known alignment of SIZE. */
1959 unsigned int offset_align
;
1960 /* The bit position within the last OFFSET_ALIGN bits, in bits. */
1962 /* The alignment of the record so far, in bits. */
1963 unsigned int record_align
;
1964 /* The alignment of the record so far, ignoring #pragma pack and
1965 __attribute__ ((packed)), in bits. */
1966 unsigned int unpacked_align
;
1967 /* The previous field laid out. */
1969 /* The static variables (i.e., class variables, as opposed to
1970 instance variables) encountered in T. */
1971 vec
<tree
, va_gc
> *pending_statics
;
1972 /* Bits remaining in the current alignment group */
1973 int remaining_in_alignment
;
1974 /* True if we've seen a packed field that didn't have normal
1975 alignment anyway. */
1976 int packed_maybe_necessary
;
1977 } *record_layout_info
;
1979 /* Iterator for going through the function arguments. */
1980 struct function_args_iterator
{
1981 tree next
; /* TREE_LIST pointing to the next argument */
1984 /* Structures to map from a tree to another tree. */
1985 struct GTY(()) tree_map_base
{
1989 /* Map from a tree to another tree. */
1991 struct GTY((for_user
)) tree_map
{
1992 struct tree_map_base base
;
1997 /* Map from a decl tree to another tree. */
1998 struct GTY((for_user
)) tree_decl_map
{
1999 struct tree_map_base base
;
2003 /* Map from a tree to an int. */
2004 struct GTY((for_user
)) tree_int_map
{
2005 struct tree_map_base base
;
2009 /* Map from a decl tree to a tree vector. */
2010 struct GTY((for_user
)) tree_vec_map
{
2011 struct tree_map_base base
;
2012 vec
<tree
, va_gc
> *to
;
2015 /* Abstract iterators for CALL_EXPRs. These static inline definitions
2016 have to go towards the end of tree.h so that union tree_node is fully
2017 defined by this point. */
2019 /* Structure containing iterator state. */
2020 struct call_expr_arg_iterator
{
2021 tree t
; /* the call_expr */
2022 int n
; /* argument count */
2023 int i
; /* next argument index */
2026 struct const_call_expr_arg_iterator
{
2027 const_tree t
; /* the call_expr */
2028 int n
; /* argument count */
2029 int i
; /* next argument index */
2032 /* The builtin_info structure holds the FUNCTION_DECL of the standard builtin
2033 function, and flags. */
2034 struct GTY(()) builtin_info_type
{
2036 /* Whether the user can use <xxx> instead of explicitly using calls
2037 to __builtin_<xxx>. */
2038 unsigned implicit_p
: 1;
2039 /* Whether the user has provided a declaration of <xxx>. */
2040 unsigned declared_p
: 1;
2043 /* Information about a _FloatN or _FloatNx type that may be
2045 struct floatn_type_info
{
2046 /* The number N in the type name. */
2048 /* Whether it is an extended type _FloatNx (true) or an interchange
2054 /*---------------------------------------------------------------------------
2056 ---------------------------------------------------------------------------*/
2057 /* Matrix describing the structures contained in a given tree code. */
2058 extern unsigned char tree_contains_struct
[MAX_TREE_CODES
][64];
2060 /* Class of tree given its code. */
2061 extern const enum tree_code_class tree_code_type
[];
2063 /* Each tree code class has an associated string representation.
2064 These must correspond to the tree_code_class entries. */
2065 extern const char *const tree_code_class_strings
[];
2067 /* Number of argument-words in each kind of tree-node. */
2068 extern const unsigned char tree_code_length
[];
2070 /* Vector of all alias pairs for global symbols. */
2071 extern GTY(()) vec
<alias_pair
, va_gc
> *alias_pairs
;
2073 /* Names of all the built_in classes. */
2074 extern const char *const built_in_class_names
[BUILT_IN_LAST
];
2076 /* Names of all the built_in functions. */
2077 extern const char * built_in_names
[(int) END_BUILTINS
];
2079 /* Number of operands and names for each OMP_CLAUSE node. */
2080 extern unsigned const char omp_clause_num_ops
[];
2081 extern const char * const omp_clause_code_name
[];
2083 /* A vector of all translation-units. */
2084 extern GTY (()) vec
<tree
, va_gc
> *all_translation_units
;
2086 /* Vector of standard trees used by the C compiler. */
2087 extern GTY(()) tree global_trees
[TI_MAX
];
2089 /* The standard C integer types. Use integer_type_kind to index into
2091 extern GTY(()) tree integer_types
[itk_none
];
2093 /* Types used to represent sizes. */
2094 extern GTY(()) tree sizetype_tab
[(int) stk_type_kind_last
];
2096 /* Arrays for keeping track of tree node statistics. */
2097 extern int tree_node_counts
[];
2098 extern int tree_node_sizes
[];
2100 /* True if we are in gimple form and the actions of the folders need to
2101 be restricted. False if we are not in gimple form and folding is not
2102 restricted to creating gimple expressions. */
2103 extern bool in_gimple_form
;
2105 /* Functional interface to the builtin functions. */
2106 extern GTY(()) builtin_info_type builtin_info
[(int)END_BUILTINS
];
2108 /* If nonzero, an upper limit on alignment of structure fields, in bits, */
2109 extern unsigned int maximum_field_alignment
;
2111 /* Points to the FUNCTION_DECL of the function whose body we are reading. */
2112 extern GTY(()) tree current_function_decl
;
2114 /* Nonzero means a FUNC_BEGIN label was emitted. */
2115 extern GTY(()) const char * current_function_func_begin_label
;
2117 /* Information about the _FloatN and _FloatNx types. */
2118 extern const floatn_type_info floatn_nx_types
[NUM_FLOATN_NX_TYPES
];
2120 #endif // GCC_TREE_CORE_H