1 /* Core data structures for the 'tree' type.
2 Copyright (C) 1989-2016 Free Software Foundation, Inc.
4 This file is part of GCC.
6 GCC is free software; you can redistribute it and/or modify it under
7 the terms of the GNU General Public License as published by the Free
8 Software Foundation; either version 3, or (at your option) any later
11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 You should have received a copy of the GNU General Public License
17 along with GCC; see the file COPYING3. If not see
18 <http://www.gnu.org/licenses/>. */
20 #ifndef GCC_TREE_CORE_H
21 #define GCC_TREE_CORE_H
25 /* This file contains all the data structures that define the 'tree' type.
26 There are no accessor macros nor functions in this file. Only the
27 basic data structures, extern declarations and type definitions. */
29 /*---------------------------------------------------------------------------
30 Forward type declarations. Mostly to avoid including unnecessary headers
31 ---------------------------------------------------------------------------*/
36 struct range_info_def
;
40 /*---------------------------------------------------------------------------
42 ---------------------------------------------------------------------------*/
43 /* Nonzero if this is a call to a function whose return value depends
44 solely on its arguments, has no side effects, and does not read
45 global memory. This corresponds to TREE_READONLY for function
47 #define ECF_CONST (1 << 0)
49 /* Nonzero if this is a call to "pure" function (like const function,
50 but may read memory. This corresponds to DECL_PURE_P for function
52 #define ECF_PURE (1 << 1)
54 /* Nonzero if this is ECF_CONST or ECF_PURE but cannot be proven to no
55 infinite loop. This corresponds to DECL_LOOPING_CONST_OR_PURE_P
57 #define ECF_LOOPING_CONST_OR_PURE (1 << 2)
59 /* Nonzero if this call will never return. */
60 #define ECF_NORETURN (1 << 3)
62 /* Nonzero if this is a call to malloc or a related function. */
63 #define ECF_MALLOC (1 << 4)
65 /* Nonzero if it is plausible that this is a call to alloca. */
66 #define ECF_MAY_BE_ALLOCA (1 << 5)
68 /* Nonzero if this is a call to a function that won't throw an exception. */
69 #define ECF_NOTHROW (1 << 6)
71 /* Nonzero if this is a call to setjmp or a related function. */
72 #define ECF_RETURNS_TWICE (1 << 7)
74 /* Nonzero if this call replaces the current stack frame. */
75 #define ECF_SIBCALL (1 << 8)
77 /* Function does not read or write memory (but may have side effects, so
78 it does not necessarily fit ECF_CONST). */
79 #define ECF_NOVOPS (1 << 9)
81 /* The function does not lead to calls within current function unit. */
82 #define ECF_LEAF (1 << 10)
84 /* Nonzero if this call 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 /* Call argument flags. */
94 /* Nonzero if the argument is not dereferenced recursively, thus only
95 directly reachable memory is read or written. */
96 #define EAF_DIRECT (1 << 0)
98 /* Nonzero if memory reached by the argument is not clobbered. */
99 #define EAF_NOCLOBBER (1 << 1)
101 /* Nonzero if the argument does not escape. */
102 #define EAF_NOESCAPE (1 << 2)
104 /* Nonzero if the argument is not used by the function. */
105 #define EAF_UNUSED (1 << 3)
107 /* Call return flags. */
108 /* Mask for the argument number that is returned. Lower two bits of
109 the return flags, encodes argument slots zero to three. */
110 #define ERF_RETURN_ARG_MASK (3)
112 /* Nonzero if the return value is equal to the argument number
113 flags & ERF_RETURN_ARG_MASK. */
114 #define ERF_RETURNS_ARG (1 << 2)
116 /* Nonzero if the return value does not alias with anything. Functions
117 with the malloc attribute have this set on their return value. */
118 #define ERF_NOALIAS (1 << 3)
121 /*---------------------------------------------------------------------------
123 ---------------------------------------------------------------------------*/
124 /* Codes of tree nodes. */
125 #define DEFTREECODE(SYM, STRING, TYPE, NARGS) SYM,
126 #define END_OF_BASE_TREE_CODES LAST_AND_UNUSED_TREE_CODE,
129 #include "all-tree.def"
134 #undef END_OF_BASE_TREE_CODES
136 /* Number of language-independent tree codes. */
137 #define NUM_TREE_CODES \
138 ((int) LAST_AND_UNUSED_TREE_CODE)
140 #define CODE_CONTAINS_STRUCT(CODE, STRUCT) \
141 (tree_contains_struct[(CODE)][(STRUCT)])
144 /* Classify which part of the compiler has defined a given builtin function.
145 Note that we assume below that this is no more than two bits. */
146 enum built_in_class
{
153 /* Last marker used for LTO stremaing of built_in_class. We can not add it
154 to the enum since we need the enumb to fit in 2 bits. */
155 #define BUILT_IN_LAST (BUILT_IN_NORMAL + 1)
157 /* Codes that identify the various built in functions
158 so that expand_call can identify them quickly. */
159 #define DEF_BUILTIN(ENUM, N, C, T, LT, B, F, NA, AT, IM, COND) ENUM,
160 enum built_in_function
{
161 #include "builtins.def"
165 #define DEF_BUILTIN(ENUM, N, C, T, LT, B, F, NA, AT, IM, COND)
166 #define DEF_BUILTIN_CHKP(ENUM, N, C, T, LT, B, F, NA, AT, IM, COND) \
167 ENUM##_CHKP = ENUM + BEGIN_CHKP_BUILTINS + 1,
168 #include "builtins.def"
170 END_CHKP_BUILTINS
= BEGIN_CHKP_BUILTINS
* 2 + 1,
172 /* Complex division routines in libgcc. These are done via builtins
173 because emit_library_call_value can't handle complex values. */
174 BUILT_IN_COMPLEX_MUL_MIN
,
175 BUILT_IN_COMPLEX_MUL_MAX
176 = BUILT_IN_COMPLEX_MUL_MIN
177 + MAX_MODE_COMPLEX_FLOAT
178 - MIN_MODE_COMPLEX_FLOAT
,
180 BUILT_IN_COMPLEX_DIV_MIN
,
181 BUILT_IN_COMPLEX_DIV_MAX
182 = BUILT_IN_COMPLEX_DIV_MIN
183 + MAX_MODE_COMPLEX_FLOAT
184 - MIN_MODE_COMPLEX_FLOAT
,
186 /* Upper bound on non-language-specific builtins. */
190 /* Internal functions. */
192 #define DEF_INTERNAL_FN(CODE, FLAGS, FNSPEC) IFN_##CODE,
193 #include "internal-fn.def"
197 /* An enum that combines target-independent built-in functions with
198 internal functions, so that they can be treated in a similar way.
199 The numbers for built-in functions are the same as for the
200 built_in_function enum. The numbers for internal functions
201 start at END_BUITLINS. */
203 #define DEF_BUILTIN(ENUM, N, C, T, LT, B, F, NA, AT, IM, COND) \
204 CFN_##ENUM = int (ENUM),
205 #include "builtins.def"
207 #define DEF_BUILTIN(ENUM, N, C, T, LT, B, F, NA, AT, IM, COND)
208 #define DEF_BUILTIN_CHKP(ENUM, N, C, T, LT, B, F, NA, AT, IM, COND) \
209 CFN_##ENUM##_CHKP = int (ENUM##_CHKP),
210 #include "builtins.def"
212 #define DEF_INTERNAL_FN(CODE, FLAGS, FNSPEC) \
213 CFN_##CODE = int (END_BUILTINS) + int (IFN_##CODE),
214 #include "internal-fn.def"
219 /* Tree code classes. Each tree_code has an associated code class
220 represented by a TREE_CODE_CLASS. */
221 enum tree_code_class
{
222 tcc_exceptional
, /* An exceptional code (fits no category). */
223 tcc_constant
, /* A constant. */
224 /* Order of tcc_type and tcc_declaration is important. */
225 tcc_type
, /* A type object code. */
226 tcc_declaration
, /* A declaration (also serving as variable refs). */
227 tcc_reference
, /* A reference to storage. */
228 tcc_comparison
, /* A comparison expression. */
229 tcc_unary
, /* A unary arithmetic expression. */
230 tcc_binary
, /* A binary arithmetic expression. */
231 tcc_statement
, /* A statement expression, which have side effects
232 but usually no interesting value. */
233 tcc_vl_exp
, /* A function call or other expression with a
234 variable-length operand vector. */
235 tcc_expression
/* Any other expression. */
238 /* OMP_CLAUSE codes. Do not reorder, as this is used to index into
239 the tables omp_clause_num_ops and omp_clause_code_name. */
240 enum omp_clause_code
{
241 /* Clause zero is special-cased inside the parser
242 (c_parser_omp_variable_list). */
243 OMP_CLAUSE_ERROR
= 0,
245 /* OpenACC/OpenMP clause: private (variable_list). */
248 /* OpenMP clause: shared (variable_list). */
251 /* OpenACC/OpenMP clause: firstprivate (variable_list). */
252 OMP_CLAUSE_FIRSTPRIVATE
,
254 /* OpenMP clause: lastprivate (variable_list). */
255 OMP_CLAUSE_LASTPRIVATE
,
257 /* OpenACC/OpenMP clause: reduction (operator:variable_list).
258 OMP_CLAUSE_REDUCTION_CODE: The tree_code of the operator.
259 Operand 1: OMP_CLAUSE_REDUCTION_INIT: Stmt-list to initialize the var.
260 Operand 2: OMP_CLAUSE_REDUCTION_MERGE: Stmt-list to merge private var
262 Operand 3: OMP_CLAUSE_REDUCTION_PLACEHOLDER: A dummy VAR_DECL
263 placeholder used in OMP_CLAUSE_REDUCTION_{INIT,MERGE}.
264 Operand 4: OMP_CLAUSE_REDUCTION_DECL_PLACEHOLDER: Another dummy
265 VAR_DECL placeholder, used like the above for C/C++ array
267 OMP_CLAUSE_REDUCTION
,
269 /* OpenMP clause: copyin (variable_list). */
272 /* OpenMP clause: copyprivate (variable_list). */
273 OMP_CLAUSE_COPYPRIVATE
,
275 /* OpenMP clause: linear (variable-list[:linear-step]). */
278 /* OpenMP clause: aligned (variable-list[:alignment]). */
281 /* OpenMP clause: depend ({in,out,inout}:variable-list). */
284 /* OpenMP clause: uniform (argument-list). */
287 /* OpenMP clause: to (extended-list).
288 Only when it appears in declare target. */
289 OMP_CLAUSE_TO_DECLARE
,
291 /* OpenMP clause: link (variable-list). */
294 /* OpenMP clause: from (variable-list). */
297 /* OpenMP clause: to (variable-list). */
300 /* OpenACC clauses: {copy, copyin, copyout, create, delete, deviceptr,
301 device, host (self), present, present_or_copy (pcopy), present_or_copyin
302 (pcopyin), present_or_copyout (pcopyout), present_or_create (pcreate)}
305 OpenMP clause: map ({alloc:,to:,from:,tofrom:,}variable-list). */
308 /* OpenACC clause: use_device (variable_list).
309 OpenMP clause: use_device_ptr (variable-list). */
310 OMP_CLAUSE_USE_DEVICE_PTR
,
312 /* OpenMP clause: is_device_ptr (variable-list). */
313 OMP_CLAUSE_IS_DEVICE_PTR
,
315 /* Internal structure to hold OpenACC cache directive's variable-list.
316 #pragma acc cache (variable-list). */
319 /* OpenACC clause: gang [(gang-argument-list)].
321 gang-argument-list: [gang-argument-list, ] gang-argument
322 gang-argument: [num:] integer-expression
323 | static: size-expression
324 size-expression: * | integer-expression. */
327 /* OpenACC clause: async [(integer-expression)]. */
330 /* OpenACC clause: wait [(integer-expression-list)]. */
333 /* OpenACC clause: auto. */
336 /* OpenACC clause: seq. */
339 /* Internal clause: temporary for combined loops expansion. */
340 OMP_CLAUSE__LOOPTEMP_
,
342 /* OpenACC/OpenMP clause: if (scalar-expression). */
345 /* OpenMP clause: num_threads (integer-expression). */
346 OMP_CLAUSE_NUM_THREADS
,
348 /* OpenMP clause: schedule. */
351 /* OpenMP clause: nowait. */
354 /* OpenMP clause: ordered [(constant-integer-expression)]. */
357 /* OpenMP clause: default. */
360 /* OpenACC/OpenMP clause: collapse (constant-integer-expression). */
363 /* OpenMP clause: untied. */
366 /* OpenMP clause: final (scalar-expression). */
369 /* OpenMP clause: mergeable. */
370 OMP_CLAUSE_MERGEABLE
,
372 /* OpenMP clause: device (integer-expression). */
375 /* OpenMP clause: dist_schedule (static[:chunk-size]). */
376 OMP_CLAUSE_DIST_SCHEDULE
,
378 /* OpenMP clause: inbranch. */
381 /* OpenMP clause: notinbranch. */
382 OMP_CLAUSE_NOTINBRANCH
,
384 /* OpenMP clause: num_teams(integer-expression). */
385 OMP_CLAUSE_NUM_TEAMS
,
387 /* OpenMP clause: thread_limit(integer-expression). */
388 OMP_CLAUSE_THREAD_LIMIT
,
390 /* OpenMP clause: proc_bind ({master,close,spread}). */
391 OMP_CLAUSE_PROC_BIND
,
393 /* OpenMP clause: safelen (constant-integer-expression). */
396 /* OpenMP clause: simdlen (constant-integer-expression). */
399 /* OpenMP clause: for. */
402 /* OpenMP clause: parallel. */
405 /* OpenMP clause: sections. */
408 /* OpenMP clause: taskgroup. */
409 OMP_CLAUSE_TASKGROUP
,
411 /* OpenMP clause: priority (integer-expression). */
414 /* OpenMP clause: grainsize (integer-expression). */
415 OMP_CLAUSE_GRAINSIZE
,
417 /* OpenMP clause: num_tasks (integer-expression). */
418 OMP_CLAUSE_NUM_TASKS
,
420 /* OpenMP clause: nogroup. */
423 /* OpenMP clause: threads. */
426 /* OpenMP clause: simd. */
429 /* OpenMP clause: hint (integer-expression). */
432 /* OpenMP clause: defaultmap (tofrom: scalar). */
433 OMP_CLAUSE_DEFAULTMAP
,
435 /* Internally used only clause, holding SIMD uid. */
436 OMP_CLAUSE__SIMDUID_
,
438 /* Internally used only clause, holding _Cilk_for # of iterations
440 OMP_CLAUSE__CILK_FOR_COUNT_
,
442 /* OpenACC clause: independent. */
443 OMP_CLAUSE_INDEPENDENT
,
445 /* OpenACC clause: worker [( [num:] integer-expression)]. */
448 /* OpenACC clause: vector [( [length:] integer-expression)]. */
451 /* OpenACC clause: num_gangs (integer-expression). */
452 OMP_CLAUSE_NUM_GANGS
,
454 /* OpenACC clause: num_workers (integer-expression). */
455 OMP_CLAUSE_NUM_WORKERS
,
457 /* OpenACC clause: vector_length (integer-expression). */
458 OMP_CLAUSE_VECTOR_LENGTH
,
460 /* OpenACC clause: tile ( size-expr-list ). */
463 /* OpenMP internal-only clause to specify grid dimensions of a gridified
469 #define DEFTREESTRUCT(ENUM, NAME) ENUM,
470 enum tree_node_structure_enum
{
471 #include "treestruct.def"
476 enum omp_clause_schedule_kind
{
477 OMP_CLAUSE_SCHEDULE_STATIC
,
478 OMP_CLAUSE_SCHEDULE_DYNAMIC
,
479 OMP_CLAUSE_SCHEDULE_GUIDED
,
480 OMP_CLAUSE_SCHEDULE_AUTO
,
481 OMP_CLAUSE_SCHEDULE_RUNTIME
,
482 OMP_CLAUSE_SCHEDULE_CILKFOR
,
483 OMP_CLAUSE_SCHEDULE_MASK
= (1 << 3) - 1,
484 OMP_CLAUSE_SCHEDULE_MONOTONIC
= (1 << 3),
485 OMP_CLAUSE_SCHEDULE_NONMONOTONIC
= (1 << 4),
486 OMP_CLAUSE_SCHEDULE_LAST
= 2 * OMP_CLAUSE_SCHEDULE_NONMONOTONIC
- 1
489 enum omp_clause_default_kind
{
490 OMP_CLAUSE_DEFAULT_UNSPECIFIED
,
491 OMP_CLAUSE_DEFAULT_SHARED
,
492 OMP_CLAUSE_DEFAULT_NONE
,
493 OMP_CLAUSE_DEFAULT_PRIVATE
,
494 OMP_CLAUSE_DEFAULT_FIRSTPRIVATE
,
495 OMP_CLAUSE_DEFAULT_LAST
498 /* There is a TYPE_QUAL value for each type qualifier. They can be
499 combined by bitwise-or to form the complete set of qualifiers for a
502 TYPE_UNQUALIFIED
= 0x0,
503 TYPE_QUAL_CONST
= 0x1,
504 TYPE_QUAL_VOLATILE
= 0x2,
505 TYPE_QUAL_RESTRICT
= 0x4,
506 TYPE_QUAL_ATOMIC
= 0x8
509 /* Standard named or nameless data types of the C compiler. */
539 TI_INTEGER_MINUS_ONE
,
556 TI_COMPLEX_INTEGER_TYPE
,
557 TI_COMPLEX_FLOAT_TYPE
,
558 TI_COMPLEX_DOUBLE_TYPE
,
559 TI_COMPLEX_LONG_DOUBLE_TYPE
,
561 TI_COMPLEX_FLOAT16_TYPE
,
562 TI_COMPLEX_FLOATN_NX_TYPE_FIRST
= TI_COMPLEX_FLOAT16_TYPE
,
563 TI_COMPLEX_FLOAT32_TYPE
,
564 TI_COMPLEX_FLOAT64_TYPE
,
565 TI_COMPLEX_FLOAT128_TYPE
,
566 TI_COMPLEX_FLOAT32X_TYPE
,
567 TI_COMPLEX_FLOAT64X_TYPE
,
568 TI_COMPLEX_FLOAT128X_TYPE
,
574 /* The _FloatN and _FloatNx types must be consecutive, and in the
575 same sequence as the corresponding complex types, which must also
576 be consecutive; _FloatN must come before _FloatNx; the order must
577 also be the same as in the floatn_nx_types array and the RID_*
578 values in c-common.h. This is so that iterations over these
579 types work as intended. */
581 TI_FLOATN_TYPE_FIRST
= TI_FLOAT16_TYPE
,
582 TI_FLOATN_NX_TYPE_FIRST
= TI_FLOAT16_TYPE
,
586 TI_FLOATN_TYPE_LAST
= TI_FLOAT128_TYPE
,
587 #define NUM_FLOATN_TYPES (TI_FLOATN_TYPE_LAST - TI_FLOATN_TYPE_FIRST + 1)
589 TI_FLOATNX_TYPE_FIRST
= TI_FLOAT32X_TYPE
,
592 TI_FLOATNX_TYPE_LAST
= TI_FLOAT128X_TYPE
,
593 TI_FLOATN_NX_TYPE_LAST
= TI_FLOAT128X_TYPE
,
594 #define NUM_FLOATNX_TYPES (TI_FLOATNX_TYPE_LAST - TI_FLOATNX_TYPE_FIRST + 1)
595 #define NUM_FLOATN_NX_TYPES (TI_FLOATN_NX_TYPE_LAST \
596 - TI_FLOATN_NX_TYPE_FIRST \
601 TI_LONG_DOUBLE_PTR_TYPE
,
611 TI_VA_LIST_GPR_COUNTER_FIELD
,
612 TI_VA_LIST_FPR_COUNTER_FIELD
,
615 TI_POINTER_SIZED_TYPE
,
617 TI_POINTER_BOUNDS_TYPE
,
622 TI_DFLOAT32_PTR_TYPE
,
623 TI_DFLOAT64_PTR_TYPE
,
624 TI_DFLOAT128_PTR_TYPE
,
637 TI_SAT_ULLFRACT_TYPE
,
653 TI_SAT_ULLACCUM_TYPE
,
699 TI_OPTIMIZATION_DEFAULT
,
700 TI_OPTIMIZATION_CURRENT
,
701 TI_TARGET_OPTION_DEFAULT
,
702 TI_TARGET_OPTION_CURRENT
,
703 TI_CURRENT_TARGET_PRAGMA
,
704 TI_CURRENT_OPTIMIZE_PRAGMA
,
709 /* An enumeration of the standard C integer types. These must be
710 ordered so that shorter types appear before longer ones, and so
711 that signed types appear before unsigned ones, for the correct
712 functioning of interpret_integer() in c-lex.c. */
713 enum integer_type_kind
{
724 itk_unsigned_long_long
,
738 /* A pointer-to-function member type looks like:
745 If __pfn is NULL, it is a NULL pointer-to-member-function.
747 (Because the vtable is always the first thing in the object, we
748 don't need its offset.) If the function is virtual, then PFN is
749 one plus twice the index into the vtable; otherwise, it is just a
750 pointer to the function.
752 Unfortunately, using the lowest bit of PFN doesn't work in
753 architectures that don't impose alignment requirements on function
754 addresses, or that use the lowest bit to tell one ISA from another,
755 for example. For such architectures, we use the lowest bit of
756 DELTA instead of the lowest bit of the PFN, and DELTA will be
758 enum ptrmemfunc_vbit_where_t
{
759 ptrmemfunc_vbit_in_pfn
,
760 ptrmemfunc_vbit_in_delta
763 /* Flags that may be passed in the third argument of decl_attributes, and
764 to handler functions for attributes. */
765 enum attribute_flags
{
766 /* The type passed in is the type of a DECL, and any attributes that
767 should be passed in again to be applied to the DECL rather than the
768 type should be returned. */
769 ATTR_FLAG_DECL_NEXT
= 1,
770 /* The type passed in is a function return type, and any attributes that
771 should be passed in again to be applied to the function type rather
772 than the return type should be returned. */
773 ATTR_FLAG_FUNCTION_NEXT
= 2,
774 /* The type passed in is an array element type, and any attributes that
775 should be passed in again to be applied to the array type rather
776 than the element type should be returned. */
777 ATTR_FLAG_ARRAY_NEXT
= 4,
778 /* The type passed in is a structure, union or enumeration type being
779 created, and should be modified in place. */
780 ATTR_FLAG_TYPE_IN_PLACE
= 8,
781 /* The attributes are being applied by default to a library function whose
782 name indicates known behavior, and should be silently ignored if they
783 are not in fact compatible with the function type. */
784 ATTR_FLAG_BUILT_IN
= 16,
785 /* A given attribute has been parsed as a C++-11 attribute. */
789 /* Types used to represent sizes. */
790 enum size_type_kind
{
791 stk_sizetype
, /* Normal representation of sizes in bytes. */
792 stk_ssizetype
, /* Signed representation of sizes in bytes. */
793 stk_bitsizetype
, /* Normal representation of sizes in bits. */
794 stk_sbitsizetype
, /* Signed representation of sizes in bits. */
798 enum operand_equal_flag
{
801 OEP_MATCH_SIDE_EFFECTS
= 4,
803 /* Internal within operand_equal_p: */
804 OEP_NO_HASH_CHECK
= 16,
805 /* Internal within inchash::add_expr: */
809 /* Enum and arrays used for tree allocation stats.
810 Keep in sync with tree.c:tree_node_kind_names. */
811 enum tree_node_kind
{
831 enum annot_expr_kind
{
832 annot_expr_ivdep_kind
,
833 annot_expr_no_vector_kind
,
834 annot_expr_vector_kind
,
838 /*---------------------------------------------------------------------------
840 ---------------------------------------------------------------------------*/
841 /* When processing aliases at the symbol table level, we need the
842 declaration of target. For this reason we need to queue aliases and
843 process them after all declarations has been produced. */
844 struct GTY(()) alias_pair
{
849 /* An initialization priority. */
850 typedef unsigned short priority_type
;
852 /* The type of a callback function for walking over tree structure. */
853 typedef tree (*walk_tree_fn
) (tree
*, int *, void *);
855 /* The type of a callback function that represents a custom walk_tree. */
856 typedef tree (*walk_tree_lh
) (tree
*, int *, tree (*) (tree
*, int *, void *),
857 void *, hash_set
<tree
> *);
860 /*---------------------------------------------------------------------------
862 ---------------------------------------------------------------------------*/
863 /* A tree node can represent a data type, a variable, an expression
864 or a statement. Each node has a TREE_CODE which says what kind of
865 thing it represents. Some common codes are:
866 INTEGER_TYPE -- represents a type of integers.
867 ARRAY_TYPE -- represents a type of pointer.
868 VAR_DECL -- represents a declared variable.
869 INTEGER_CST -- represents a constant integer value.
870 PLUS_EXPR -- represents a sum (an expression).
872 As for the contents of a tree node: there are some fields
873 that all nodes share. Each TREE_CODE has various special-purpose
874 fields as well. The fields of a node are never accessed directly,
875 always through accessor macros. */
877 /* Every kind of tree node starts with this structure,
878 so all nodes have these fields.
880 See the accessor macros, defined below, for documentation of the
881 fields, and the table below which connects the fields and the
884 struct GTY(()) tree_base
{
885 ENUM_BITFIELD(tree_code
) code
: 16;
887 unsigned side_effects_flag
: 1;
888 unsigned constant_flag
: 1;
889 unsigned addressable_flag
: 1;
890 unsigned volatile_flag
: 1;
891 unsigned readonly_flag
: 1;
892 unsigned asm_written_flag
: 1;
893 unsigned nowarning_flag
: 1;
894 unsigned visited
: 1;
896 unsigned used_flag
: 1;
897 unsigned nothrow_flag
: 1;
898 unsigned static_flag
: 1;
899 unsigned public_flag
: 1;
900 unsigned private_flag
: 1;
901 unsigned protected_flag
: 1;
902 unsigned deprecated_flag
: 1;
903 unsigned default_def_flag
: 1;
906 /* The bits in the following structure should only be used with
907 accessor macros that constrain inputs with tree checking. */
909 unsigned lang_flag_0
: 1;
910 unsigned lang_flag_1
: 1;
911 unsigned lang_flag_2
: 1;
912 unsigned lang_flag_3
: 1;
913 unsigned lang_flag_4
: 1;
914 unsigned lang_flag_5
: 1;
915 unsigned lang_flag_6
: 1;
916 unsigned saturating_flag
: 1;
918 unsigned unsigned_flag
: 1;
919 unsigned packed_flag
: 1;
920 unsigned user_align
: 1;
921 unsigned nameless_flag
: 1;
922 unsigned atomic_flag
: 1;
927 /* This field is only used with TREE_TYPE nodes; the only reason it is
928 present in tree_base instead of tree_type is to save space. The size
929 of the field must be large enough to hold addr_space_t values. */
930 unsigned address_space
: 8;
933 /* The following fields are present in tree_base to save space. The
934 nodes using them do not require any of the flags above and so can
935 make better use of the 4-byte sized word. */
937 /* The number of HOST_WIDE_INTs in an INTEGER_CST. */
939 /* The number of HOST_WIDE_INTs if the INTEGER_CST is accessed in
940 its native precision. */
941 unsigned char unextended
;
943 /* The number of HOST_WIDE_INTs if the INTEGER_CST is extended to
944 wider precisions based on its TYPE_SIGN. */
945 unsigned char extended
;
947 /* The number of HOST_WIDE_INTs if the INTEGER_CST is accessed in
948 offset_int precision, with smaller integers being extended
949 according to their TYPE_SIGN. This is equal to one of the two
950 fields above but is cached for speed. */
951 unsigned char offset
;
954 /* VEC length. This field is only used with TREE_VEC. */
957 /* SSA version number. This field is only used with SSA_NAME. */
958 unsigned int version
;
960 /* Internal function code. */
961 enum internal_fn ifn
;
963 /* The following two fields are used for MEM_REF and TARGET_MEM_REF
964 expression trees and specify known data non-dependences. For
965 two memory references in a function they are known to not
966 alias if dependence_info.clique are equal and dependence_info.base
969 unsigned short clique
;
975 /* The following table lists the uses of each of the above flags and
976 for which types of nodes they are defined.
981 VAR_DECL, PARM_DECL, RESULT_DECL, FUNCTION_DECL, LABEL_DECL
984 CONSTRUCTOR, IDENTIFIER_NODE
987 CALL_EXPR_TAILCALL in
993 PREDICT_EXPR_OUTCOME in
999 VAR_DECL, FUNCTION_DECL
1002 TREE_NO_TRAMPOLINE in
1008 TREE_SYMBOL_REFERENCED in
1012 TARGET_EXPR, WITH_CLEANUP_EXPR
1014 TRY_CATCH_IS_CLEANUP in
1020 TYPE_REF_CAN_ALIAS_ALL in
1021 POINTER_TYPE, REFERENCE_TYPE
1029 TRANSACTION_EXPR_OUTER in
1032 SSA_NAME_ANTI_RANGE_P in
1041 INTEGER_CST, REAL_CST, COMPLEX_CST, VECTOR_CST
1044 VAR_DECL, FUNCTION_DECL
1047 CONSTRUCTOR_NO_CLEARING in
1053 CALL_EXPR_VA_ARG_PACK in
1056 TYPE_CACHED_VALUES_P in
1059 SAVE_EXPR_RESOLVED_P in
1062 OMP_CLAUSE_LASTPRIVATE_FIRSTPRIVATE in
1063 OMP_CLAUSE_LASTPRIVATE
1065 OMP_CLAUSE_PRIVATE_DEBUG in
1068 OMP_CLAUSE_LINEAR_NO_COPYIN in
1071 OMP_CLAUSE_MAP_ZERO_BIAS_ARRAY_SECTION in
1074 OMP_CLAUSE_REDUCTION_OMP_ORIG_REF in
1075 OMP_CLAUSE_REDUCTION
1077 TRANSACTION_EXPR_RELAXED in
1085 CALL_EXPR_RETURN_SLOT_OPT in
1091 OMP_PARALLEL_COMBINED in
1094 OMP_ATOMIC_SEQ_CST in
1097 OMP_CLAUSE_PRIVATE_OUTER_REF in
1100 OMP_CLAUSE_LINEAR_NO_COPYOUT in
1103 TYPE_REF_IS_RVALUE in
1115 CALL_FROM_THUNK_P and
1116 CALL_ALLOCA_FOR_VAR_P in
1119 OMP_CLAUSE_LINEAR_VARIABLE_STRIDE in
1124 TREE_SIDE_EFFECTS in
1134 TREE_THIS_VOLATILE in
1157 TYPE_SIZES_GIMPLIFIED in
1171 VAR_DECL, FUNCTION_DECL, TYPE_DECL
1172 RECORD_TYPE, UNION_TYPE, QUAL_UNION_TYPE
1175 SSA_NAME_OCCURS_IN_ABNORMAL_PHI in
1192 INDIRECT_REF, MEM_REF, TARGET_MEM_REF, ARRAY_REF, ARRAY_RANGE_REF
1194 SSA_NAME_IN_FREE_LIST in
1206 IDENTIFIER_TRANSPARENT_ALIAS in
1212 all trees (used liberally by many passes)
1216 TYPE_REVERSE_STORAGE_ORDER in
1217 RECORD_TYPE, UNION_TYPE, QUAL_UNION_TYPE, ARRAY_TYPE
1222 VAR_DECL_IS_VIRTUAL_OPERAND in
1237 RECORD_TYPE, UNION_TYPE and QUAL_UNION_TYPE
1239 TYPE_VECTOR_OPAQUE in
1242 SSA_NAME_IS_DEFAULT_DEF in
1245 DECL_NONLOCAL_FRAME in
1248 REF_REVERSE_STORAGE_ORDER in
1249 BIT_FIELD_REF, MEM_REF
1252 struct GTY(()) tree_typed
{
1253 struct tree_base base
;
1257 struct GTY(()) tree_common
{
1258 struct tree_typed typed
;
1262 struct GTY(()) tree_int_cst
{
1263 struct tree_typed typed
;
1264 HOST_WIDE_INT val
[1];
1268 struct GTY(()) tree_real_cst
{
1269 struct tree_typed typed
;
1270 struct real_value
* real_cst_ptr
;
1273 struct GTY(()) tree_fixed_cst
{
1274 struct tree_typed typed
;
1275 struct fixed_value
* fixed_cst_ptr
;
1278 struct GTY(()) tree_string
{
1279 struct tree_typed typed
;
1284 struct GTY(()) tree_complex
{
1285 struct tree_typed typed
;
1290 struct GTY(()) tree_vector
{
1291 struct tree_typed typed
;
1292 tree
GTY ((length ("TYPE_VECTOR_SUBPARTS (TREE_TYPE ((tree)&%h))"))) elts
[1];
1295 struct GTY(()) tree_identifier
{
1296 struct tree_common common
;
1297 struct ht_identifier id
;
1300 struct GTY(()) tree_list
{
1301 struct tree_common common
;
1306 struct GTY(()) tree_vec
{
1307 struct tree_common common
;
1308 tree
GTY ((length ("TREE_VEC_LENGTH ((tree)&%h)"))) a
[1];
1311 /* A single element of a CONSTRUCTOR. VALUE holds the actual value of the
1312 element. INDEX can optionally design the position of VALUE: in arrays,
1313 it is the index where VALUE has to be placed; in structures, it is the
1314 FIELD_DECL of the member. */
1315 struct GTY(()) constructor_elt
{
1320 struct GTY(()) tree_constructor
{
1321 struct tree_typed typed
;
1322 vec
<constructor_elt
, va_gc
> *elts
;
1325 enum omp_clause_depend_kind
1327 OMP_CLAUSE_DEPEND_IN
,
1328 OMP_CLAUSE_DEPEND_OUT
,
1329 OMP_CLAUSE_DEPEND_INOUT
,
1330 OMP_CLAUSE_DEPEND_SOURCE
,
1331 OMP_CLAUSE_DEPEND_SINK
,
1332 OMP_CLAUSE_DEPEND_LAST
1335 enum omp_clause_proc_bind_kind
1337 /* Numbers should match omp_proc_bind_t enum in omp.h. */
1338 OMP_CLAUSE_PROC_BIND_FALSE
= 0,
1339 OMP_CLAUSE_PROC_BIND_TRUE
= 1,
1340 OMP_CLAUSE_PROC_BIND_MASTER
= 2,
1341 OMP_CLAUSE_PROC_BIND_CLOSE
= 3,
1342 OMP_CLAUSE_PROC_BIND_SPREAD
= 4,
1343 OMP_CLAUSE_PROC_BIND_LAST
1346 enum omp_clause_linear_kind
1348 OMP_CLAUSE_LINEAR_DEFAULT
,
1349 OMP_CLAUSE_LINEAR_REF
,
1350 OMP_CLAUSE_LINEAR_VAL
,
1351 OMP_CLAUSE_LINEAR_UVAL
1354 struct GTY(()) tree_exp
{
1355 struct tree_typed typed
;
1357 tree
GTY ((special ("tree_exp"),
1358 desc ("TREE_CODE ((tree) &%0)")))
1362 /* Immediate use linking structure. This structure is used for maintaining
1363 a doubly linked list of uses of an SSA_NAME. */
1364 struct GTY(()) ssa_use_operand_t
{
1365 struct ssa_use_operand_t
* GTY((skip(""))) prev
;
1366 struct ssa_use_operand_t
* GTY((skip(""))) next
;
1367 /* Immediate uses for a given SSA name are maintained as a cyclic
1368 list. To recognize the root of this list, the location field
1369 needs to point to the original SSA name. Since statements and
1370 SSA names are of different data types, we need this union. See
1371 the explanation in struct imm_use_iterator. */
1372 union { gimple
*stmt
; tree ssa_name
; } GTY((skip(""))) loc
;
1373 tree
*GTY((skip(""))) use
;
1376 struct GTY(()) tree_ssa_name
{
1377 struct tree_typed typed
;
1379 /* _DECL wrapped by this SSA name. */
1382 /* Statement that defines this SSA name. */
1385 /* Value range information. */
1386 union ssa_name_info_type
{
1387 /* Pointer attributes used for alias analysis. */
1388 struct GTY ((tag ("0"))) ptr_info_def
*ptr_info
;
1389 /* Value range attributes used for zero/sign extension elimination. */
1390 struct GTY ((tag ("1"))) range_info_def
*range_info
;
1391 } GTY ((desc ("%1.typed.type ?" \
1392 "!POINTER_TYPE_P (TREE_TYPE ((tree)&%1)) : 2"))) info
;
1394 /* Immediate uses list for this SSA_NAME. */
1395 struct ssa_use_operand_t imm_uses
;
1398 struct GTY(()) phi_arg_d
{
1399 /* imm_use MUST be the first element in struct because we do some
1400 pointer arithmetic with it. See phi_arg_index_from_use. */
1401 struct ssa_use_operand_t imm_use
;
1406 struct GTY(()) tree_omp_clause
{
1407 struct tree_common common
;
1409 enum omp_clause_code code
;
1410 union omp_clause_subcode
{
1411 enum omp_clause_default_kind default_kind
;
1412 enum omp_clause_schedule_kind schedule_kind
;
1413 enum omp_clause_depend_kind depend_kind
;
1414 /* See include/gomp-constants.h for enum gomp_map_kind's values. */
1415 unsigned int map_kind
;
1416 enum omp_clause_proc_bind_kind proc_bind_kind
;
1417 enum tree_code reduction_code
;
1418 enum omp_clause_linear_kind linear_kind
;
1419 enum tree_code if_modifier
;
1420 /* The dimension a OMP_CLAUSE__GRIDDIM_ clause of a gridified target
1421 construct describes. */
1422 unsigned int dimension
;
1423 } GTY ((skip
)) subcode
;
1425 /* The gimplification of OMP_CLAUSE_REDUCTION_{INIT,MERGE} for omp-low's
1427 gimple_seq gimple_reduction_init
;
1428 gimple_seq gimple_reduction_merge
;
1430 tree
GTY ((length ("omp_clause_num_ops[OMP_CLAUSE_CODE ((tree)&%h)]")))
1434 struct GTY(()) tree_block
{
1435 struct tree_base base
;
1438 unsigned abstract_flag
: 1;
1439 unsigned block_num
: 31;
1442 location_t end_locus
;
1445 vec
<tree
, va_gc
> *nonlocalized_vars
;
1449 tree abstract_origin
;
1450 tree fragment_origin
;
1451 tree fragment_chain
;
1453 /* Pointer to the DWARF lexical block. */
1454 struct die_struct
*die
;
1457 struct GTY(()) tree_type_common
{
1458 struct tree_common common
;
1464 unsigned int precision
: 10;
1465 unsigned no_force_blk_flag
: 1;
1466 unsigned needs_constructing_flag
: 1;
1467 unsigned transparent_aggr_flag
: 1;
1468 unsigned restrict_flag
: 1;
1469 unsigned contains_placeholder_bits
: 2;
1471 ENUM_BITFIELD(machine_mode
) mode
: 8;
1473 unsigned string_flag
: 1;
1474 unsigned lang_flag_0
: 1;
1475 unsigned lang_flag_1
: 1;
1476 unsigned lang_flag_2
: 1;
1477 unsigned lang_flag_3
: 1;
1478 unsigned lang_flag_4
: 1;
1479 unsigned lang_flag_5
: 1;
1480 unsigned lang_flag_6
: 1;
1481 unsigned lang_flag_7
: 1;
1483 /* TYPE_ALIGN in log2; this has to be large enough to hold values
1484 of the maximum of BIGGEST_ALIGNMENT and MAX_OFILE_ALIGNMENT,
1485 the latter being usually the larger. For ELF it is 8<<28,
1486 so we need to store the value 32 (not 31, as we need the zero
1487 as well), hence six bits. */
1489 unsigned spare
: 25;
1490 alias_set_type alias_set
;
1493 union tree_type_symtab
{
1494 int GTY ((tag ("TYPE_SYMTAB_IS_ADDRESS"))) address
;
1495 const char * GTY ((tag ("TYPE_SYMTAB_IS_POINTER"))) pointer
;
1496 struct die_struct
* GTY ((tag ("TYPE_SYMTAB_IS_DIE"))) die
;
1497 } GTY ((desc ("debug_hooks->tree_type_symtab_field"))) symtab
;
1505 struct GTY(()) tree_type_with_lang_specific
{
1506 struct tree_type_common common
;
1507 /* Points to a structure whose details depend on the language in use. */
1508 struct lang_type
*lang_specific
;
1511 struct GTY(()) tree_type_non_common
{
1512 struct tree_type_with_lang_specific with_lang_specific
;
1519 struct GTY (()) tree_binfo
{
1520 struct tree_common common
;
1526 vec
<tree
, va_gc
> *base_accesses
;
1532 vec
<tree
, va_gc
> base_binfos
;
1535 struct GTY(()) tree_decl_minimal
{
1536 struct tree_common common
;
1543 struct GTY(()) tree_decl_common
{
1544 struct tree_decl_minimal common
;
1547 ENUM_BITFIELD(machine_mode
) mode
: 8;
1549 unsigned nonlocal_flag
: 1;
1550 unsigned virtual_flag
: 1;
1551 unsigned ignored_flag
: 1;
1552 unsigned abstract_flag
: 1;
1553 unsigned artificial_flag
: 1;
1554 unsigned preserve_flag
: 1;
1555 unsigned debug_expr_is_from
: 1;
1557 unsigned lang_flag_0
: 1;
1558 unsigned lang_flag_1
: 1;
1559 unsigned lang_flag_2
: 1;
1560 unsigned lang_flag_3
: 1;
1561 unsigned lang_flag_4
: 1;
1562 unsigned lang_flag_5
: 1;
1563 unsigned lang_flag_6
: 1;
1564 unsigned lang_flag_7
: 1;
1565 unsigned lang_flag_8
: 1;
1567 /* In VAR_DECL and PARM_DECL, this is DECL_REGISTER. */
1568 unsigned decl_flag_0
: 1;
1569 /* In FIELD_DECL, this is DECL_BIT_FIELD
1570 In VAR_DECL and FUNCTION_DECL, this is DECL_EXTERNAL.
1571 In TYPE_DECL, this is TYPE_DECL_SUPPRESS_DEBUG. */
1572 unsigned decl_flag_1
: 1;
1573 /* In FIELD_DECL, this is DECL_NONADDRESSABLE_P
1574 In VAR_DECL, PARM_DECL and RESULT_DECL, this is
1575 DECL_HAS_VALUE_EXPR_P. */
1576 unsigned decl_flag_2
: 1;
1578 unsigned decl_flag_3
: 1;
1579 /* Logically, these two would go in a theoretical base shared by var and
1581 unsigned gimple_reg_flag
: 1;
1582 /* In VAR_DECL, PARM_DECL and RESULT_DECL, this is DECL_BY_REFERENCE. */
1583 unsigned decl_by_reference_flag
: 1;
1584 /* In a VAR_DECL and PARM_DECL, this is DECL_READ_P. */
1585 unsigned decl_read_flag
: 1;
1586 /* In a VAR_DECL or RESULT_DECL, this is DECL_NONSHAREABLE. */
1587 unsigned decl_nonshareable_flag
: 1;
1589 /* DECL_OFFSET_ALIGN, used only for FIELD_DECLs. */
1590 unsigned int off_align
: 6;
1592 /* DECL_ALIGN. It should have the same size as TYPE_ALIGN. */
1593 unsigned int align
: 6;
1595 /* 20 bits unused. */
1597 /* UID for points-to sets, stable over copying from inlining. */
1598 unsigned int pt_uid
;
1603 tree abstract_origin
;
1605 /* Points to a structure whose details depend on the language in use. */
1606 struct lang_decl
*lang_specific
;
1609 struct GTY(()) tree_decl_with_rtl
{
1610 struct tree_decl_common common
;
1614 struct GTY(()) tree_field_decl
{
1615 struct tree_decl_common common
;
1618 tree bit_field_type
;
1624 struct GTY(()) tree_label_decl
{
1625 struct tree_decl_with_rtl common
;
1627 int eh_landing_pad_nr
;
1630 struct GTY(()) tree_result_decl
{
1631 struct tree_decl_with_rtl common
;
1634 struct GTY(()) tree_const_decl
{
1635 struct tree_decl_common common
;
1638 struct GTY(()) tree_parm_decl
{
1639 struct tree_decl_with_rtl common
;
1643 struct GTY(()) tree_decl_with_vis
{
1644 struct tree_decl_with_rtl common
;
1645 tree assembler_name
;
1646 struct symtab_node
*symtab_node
;
1648 /* Belong to VAR_DECL exclusively. */
1649 unsigned defer_output
: 1;
1650 unsigned hard_register
: 1;
1651 unsigned common_flag
: 1;
1652 unsigned in_text_section
: 1;
1653 unsigned in_constant_pool
: 1;
1654 unsigned dllimport_flag
: 1;
1655 /* Don't belong to VAR_DECL exclusively. */
1656 unsigned weak_flag
: 1;
1658 unsigned seen_in_bind_expr
: 1;
1659 unsigned comdat_flag
: 1;
1660 /* Used for FUNCTION_DECL, VAR_DECL and in C++ for TYPE_DECL. */
1661 ENUM_BITFIELD(symbol_visibility
) visibility
: 2;
1662 unsigned visibility_specified
: 1;
1664 /* Belong to FUNCTION_DECL exclusively. */
1665 unsigned init_priority_p
: 1;
1666 /* Used by C++ only. Might become a generic decl flag. */
1667 unsigned shadowed_for_var_p
: 1;
1668 /* Belong to FUNCTION_DECL exclusively. */
1669 unsigned cxx_constructor
: 1;
1670 /* Belong to FUNCTION_DECL exclusively. */
1671 unsigned cxx_destructor
: 1;
1672 /* Belong to FUNCTION_DECL exclusively. */
1674 /* Belong to FUNCTION_DECL exclusively. */
1675 unsigned regdecl_flag
: 1;
1676 /* 14 unused bits. */
1679 struct GTY(()) tree_var_decl
{
1680 struct tree_decl_with_vis common
;
1683 struct GTY(()) tree_decl_non_common
{
1684 struct tree_decl_with_vis common
;
1685 /* Almost all FE's use this. */
1689 /* FUNCTION_DECL inherits from DECL_NON_COMMON because of the use of the
1690 arguments/result/saved_tree fields by front ends. It was either inherit
1691 FUNCTION_DECL from non_common, or inherit non_common from FUNCTION_DECL,
1692 which seemed a bit strange. */
1694 struct GTY(()) tree_function_decl
{
1695 struct tree_decl_non_common common
;
1699 /* Arguments of the function. */
1701 /* The personality function. Used for stack unwinding. */
1704 /* Function specific options that are used by this function. */
1705 tree function_specific_target
; /* target options */
1706 tree function_specific_optimization
; /* optimization options */
1708 /* Generic function body. */
1710 /* Index within a virtual table. */
1713 /* In a FUNCTION_DECL for which DECL_BUILT_IN holds, this is
1714 DECL_FUNCTION_CODE. Otherwise unused.
1715 ??? The bitfield needs to be able to hold all target function
1717 ENUM_BITFIELD(built_in_function
) function_code
: 12;
1718 ENUM_BITFIELD(built_in_class
) built_in_class
: 2;
1720 unsigned static_ctor_flag
: 1;
1721 unsigned static_dtor_flag
: 1;
1723 unsigned uninlinable
: 1;
1724 unsigned possibly_inlined
: 1;
1725 unsigned novops_flag
: 1;
1726 unsigned returns_twice_flag
: 1;
1727 unsigned malloc_flag
: 1;
1728 unsigned operator_new_flag
: 1;
1729 unsigned declared_inline_flag
: 1;
1730 unsigned no_inline_warning_flag
: 1;
1732 unsigned no_instrument_function_entry_exit
: 1;
1733 unsigned no_limit_stack
: 1;
1734 unsigned disregard_inline_limits
: 1;
1735 unsigned pure_flag
: 1;
1736 unsigned looping_const_or_pure_flag
: 1;
1737 unsigned has_debug_args_flag
: 1;
1738 unsigned tm_clone_flag
: 1;
1739 unsigned versioned_function
: 1;
1743 struct GTY(()) tree_translation_unit_decl
{
1744 struct tree_decl_common common
;
1745 /* Source language of this translation unit. Used for DWARF output. */
1746 const char * GTY((skip(""))) language
;
1747 /* TODO: Non-optimization used to build this translation unit. */
1748 /* TODO: Root of a partial DWARF tree for global types and decls. */
1751 struct GTY(()) tree_type_decl
{
1752 struct tree_decl_non_common common
;
1756 struct GTY ((chain_next ("%h.next"), chain_prev ("%h.prev"))) tree_statement_list_node
1758 struct tree_statement_list_node
*prev
;
1759 struct tree_statement_list_node
*next
;
1763 struct GTY(()) tree_statement_list
1765 struct tree_typed typed
;
1766 struct tree_statement_list_node
*head
;
1767 struct tree_statement_list_node
*tail
;
1771 /* Optimization options used by a function. */
1773 struct GTY(()) tree_optimization_option
{
1774 struct tree_common common
;
1776 /* The optimization options used by the user. */
1777 struct cl_optimization
*opts
;
1779 /* Target optabs for this set of optimization options. This is of
1780 type `struct target_optabs *'. */
1781 void *GTY ((atomic
)) optabs
;
1783 /* The value of this_target_optabs against which the optabs above were
1785 struct target_optabs
*GTY ((skip
)) base_optabs
;
1788 /* Forward declaration, defined in target-globals.h. */
1790 struct GTY(()) target_globals
;
1792 /* Target options used by a function. */
1794 struct GTY(()) tree_target_option
{
1795 struct tree_common common
;
1797 /* Target globals for the corresponding target option. */
1798 struct target_globals
*globals
;
1800 /* The optimization options used by the user. */
1801 struct cl_target_option
*opts
;
1804 /* Define the overall contents of a tree node.
1805 It may be any of the structures declared above
1806 for various types of node. */
1807 union GTY ((ptr_alias (union lang_tree_node
),
1808 desc ("tree_node_structure (&%h)"), variable_size
)) tree_node
{
1809 struct tree_base
GTY ((tag ("TS_BASE"))) base
;
1810 struct tree_typed
GTY ((tag ("TS_TYPED"))) typed
;
1811 struct tree_common
GTY ((tag ("TS_COMMON"))) common
;
1812 struct tree_int_cst
GTY ((tag ("TS_INT_CST"))) int_cst
;
1813 struct tree_real_cst
GTY ((tag ("TS_REAL_CST"))) real_cst
;
1814 struct tree_fixed_cst
GTY ((tag ("TS_FIXED_CST"))) fixed_cst
;
1815 struct tree_vector
GTY ((tag ("TS_VECTOR"))) vector
;
1816 struct tree_string
GTY ((tag ("TS_STRING"))) string
;
1817 struct tree_complex
GTY ((tag ("TS_COMPLEX"))) complex;
1818 struct tree_identifier
GTY ((tag ("TS_IDENTIFIER"))) identifier
;
1819 struct tree_decl_minimal
GTY((tag ("TS_DECL_MINIMAL"))) decl_minimal
;
1820 struct tree_decl_common
GTY ((tag ("TS_DECL_COMMON"))) decl_common
;
1821 struct tree_decl_with_rtl
GTY ((tag ("TS_DECL_WRTL"))) decl_with_rtl
;
1822 struct tree_decl_non_common
GTY ((tag ("TS_DECL_NON_COMMON")))
1824 struct tree_parm_decl
GTY ((tag ("TS_PARM_DECL"))) parm_decl
;
1825 struct tree_decl_with_vis
GTY ((tag ("TS_DECL_WITH_VIS"))) decl_with_vis
;
1826 struct tree_var_decl
GTY ((tag ("TS_VAR_DECL"))) var_decl
;
1827 struct tree_field_decl
GTY ((tag ("TS_FIELD_DECL"))) field_decl
;
1828 struct tree_label_decl
GTY ((tag ("TS_LABEL_DECL"))) label_decl
;
1829 struct tree_result_decl
GTY ((tag ("TS_RESULT_DECL"))) result_decl
;
1830 struct tree_const_decl
GTY ((tag ("TS_CONST_DECL"))) const_decl
;
1831 struct tree_type_decl
GTY ((tag ("TS_TYPE_DECL"))) type_decl
;
1832 struct tree_function_decl
GTY ((tag ("TS_FUNCTION_DECL"))) function_decl
;
1833 struct tree_translation_unit_decl
GTY ((tag ("TS_TRANSLATION_UNIT_DECL")))
1834 translation_unit_decl
;
1835 struct tree_type_common
GTY ((tag ("TS_TYPE_COMMON"))) type_common
;
1836 struct tree_type_with_lang_specific
GTY ((tag ("TS_TYPE_WITH_LANG_SPECIFIC")))
1837 type_with_lang_specific
;
1838 struct tree_type_non_common
GTY ((tag ("TS_TYPE_NON_COMMON")))
1840 struct tree_list
GTY ((tag ("TS_LIST"))) list
;
1841 struct tree_vec
GTY ((tag ("TS_VEC"))) vec
;
1842 struct tree_exp
GTY ((tag ("TS_EXP"))) exp
;
1843 struct tree_ssa_name
GTY ((tag ("TS_SSA_NAME"))) ssa_name
;
1844 struct tree_block
GTY ((tag ("TS_BLOCK"))) block
;
1845 struct tree_binfo
GTY ((tag ("TS_BINFO"))) binfo
;
1846 struct tree_statement_list
GTY ((tag ("TS_STATEMENT_LIST"))) stmt_list
;
1847 struct tree_constructor
GTY ((tag ("TS_CONSTRUCTOR"))) constructor
;
1848 struct tree_omp_clause
GTY ((tag ("TS_OMP_CLAUSE"))) omp_clause
;
1849 struct tree_optimization_option
GTY ((tag ("TS_OPTIMIZATION"))) optimization
;
1850 struct tree_target_option
GTY ((tag ("TS_TARGET_OPTION"))) target_option
;
1853 /* Structure describing an attribute and a function to handle it. */
1854 struct attribute_spec
{
1855 /* The name of the attribute (without any leading or trailing __),
1856 or NULL to mark the end of a table of attributes. */
1858 /* The minimum length of the list of arguments of the attribute. */
1860 /* The maximum length of the list of arguments of the attribute
1861 (-1 for no maximum). */
1863 /* Whether this attribute requires a DECL. If it does, it will be passed
1864 from types of DECLs, function return types and array element types to
1865 the DECLs, function types and array types respectively; but when
1866 applied to a type in any other circumstances, it will be ignored with
1867 a warning. (If greater control is desired for a given attribute,
1868 this should be false, and the flags argument to the handler may be
1869 used to gain greater control in that case.) */
1871 /* Whether this attribute requires a type. If it does, it will be passed
1872 from a DECL to the type of that DECL. */
1874 /* Whether this attribute requires a function (or method) type. If it does,
1875 it will be passed from a function pointer type to the target type,
1876 and from a function return type (which is not itself a function
1877 pointer type) to the function type. */
1878 bool function_type_required
;
1879 /* Function to handle this attribute. NODE points to the node to which
1880 the attribute is to be applied. If a DECL, it should be modified in
1881 place; if a TYPE, a copy should be created. NAME is the name of the
1882 attribute (possibly with leading or trailing __). ARGS is the TREE_LIST
1883 of the arguments (which may be NULL). FLAGS gives further information
1884 about the context of the attribute. Afterwards, the attributes will
1885 be added to the DECL_ATTRIBUTES or TYPE_ATTRIBUTES, as appropriate,
1886 unless *NO_ADD_ATTRS is set to true (which should be done on error,
1887 as well as in any other cases when the attributes should not be added
1888 to the DECL or TYPE). Depending on FLAGS, any attributes to be
1889 applied to another type or DECL later may be returned;
1890 otherwise the return value should be NULL_TREE. This pointer may be
1891 NULL if no special handling is required beyond the checks implied
1892 by the rest of this structure. */
1893 tree (*handler
) (tree
*node
, tree name
, tree args
,
1894 int flags
, bool *no_add_attrs
);
1895 /* Specifies if attribute affects type's identity. */
1896 bool affects_type_identity
;
1899 /* These functions allow a front-end to perform a manual layout of a
1900 RECORD_TYPE. (For instance, if the placement of subsequent fields
1901 depends on the placement of fields so far.) Begin by calling
1902 start_record_layout. Then, call place_field for each of the
1903 fields. Then, call finish_record_layout. See layout_type for the
1904 default way in which these functions are used. */
1905 typedef struct record_layout_info_s
{
1906 /* The RECORD_TYPE that we are laying out. */
1908 /* The offset into the record so far, in bytes, not including bits in
1911 /* The last known alignment of SIZE. */
1912 unsigned int offset_align
;
1913 /* The bit position within the last OFFSET_ALIGN bits, in bits. */
1915 /* The alignment of the record so far, in bits. */
1916 unsigned int record_align
;
1917 /* The alignment of the record so far, ignoring #pragma pack and
1918 __attribute__ ((packed)), in bits. */
1919 unsigned int unpacked_align
;
1920 /* The previous field laid out. */
1922 /* The static variables (i.e., class variables, as opposed to
1923 instance variables) encountered in T. */
1924 vec
<tree
, va_gc
> *pending_statics
;
1925 /* Bits remaining in the current alignment group */
1926 int remaining_in_alignment
;
1927 /* True if we've seen a packed field that didn't have normal
1928 alignment anyway. */
1929 int packed_maybe_necessary
;
1930 } *record_layout_info
;
1932 /* Iterator for going through the function arguments. */
1933 struct function_args_iterator
{
1934 tree next
; /* TREE_LIST pointing to the next argument */
1937 /* Structures to map from a tree to another tree. */
1938 struct GTY(()) tree_map_base
{
1942 /* Map from a tree to another tree. */
1944 struct GTY((for_user
)) tree_map
{
1945 struct tree_map_base base
;
1950 /* Map from a decl tree to another tree. */
1951 struct GTY((for_user
)) tree_decl_map
{
1952 struct tree_map_base base
;
1956 /* Map from a tree to an int. */
1957 struct GTY((for_user
)) tree_int_map
{
1958 struct tree_map_base base
;
1962 /* Map from a decl tree to a tree vector. */
1963 struct GTY((for_user
)) tree_vec_map
{
1964 struct tree_map_base base
;
1965 vec
<tree
, va_gc
> *to
;
1968 /* Abstract iterators for CALL_EXPRs. These static inline definitions
1969 have to go towards the end of tree.h so that union tree_node is fully
1970 defined by this point. */
1972 /* Structure containing iterator state. */
1973 struct call_expr_arg_iterator
{
1974 tree t
; /* the call_expr */
1975 int n
; /* argument count */
1976 int i
; /* next argument index */
1979 struct const_call_expr_arg_iterator
{
1980 const_tree t
; /* the call_expr */
1981 int n
; /* argument count */
1982 int i
; /* next argument index */
1985 /* The builtin_info structure holds the FUNCTION_DECL of the standard builtin
1986 function, and flags. */
1987 struct GTY(()) builtin_info_type
{
1989 /* Whether the user can use <xxx> instead of explicitly using calls
1990 to __builtin_<xxx>. */
1991 unsigned implicit_p
: 1;
1992 /* Whether the user has provided a declaration of <xxx>. */
1993 unsigned declared_p
: 1;
1996 /* Information about a _FloatN or _FloatNx type that may be
1998 struct floatn_type_info
{
1999 /* The number N in the type name. */
2001 /* Whether it is an extended type _FloatNx (true) or an interchange
2007 /*---------------------------------------------------------------------------
2009 ---------------------------------------------------------------------------*/
2010 /* Matrix describing the structures contained in a given tree code. */
2011 extern unsigned char tree_contains_struct
[MAX_TREE_CODES
][64];
2013 /* Class of tree given its code. */
2014 extern const enum tree_code_class tree_code_type
[];
2016 /* Each tree code class has an associated string representation.
2017 These must correspond to the tree_code_class entries. */
2018 extern const char *const tree_code_class_strings
[];
2020 /* Number of argument-words in each kind of tree-node. */
2021 extern const unsigned char tree_code_length
[];
2023 /* Vector of all alias pairs for global symbols. */
2024 extern GTY(()) vec
<alias_pair
, va_gc
> *alias_pairs
;
2026 /* Names of all the built_in classes. */
2027 extern const char *const built_in_class_names
[BUILT_IN_LAST
];
2029 /* Names of all the built_in functions. */
2030 extern const char * built_in_names
[(int) END_BUILTINS
];
2032 /* Number of operands and names for each OMP_CLAUSE node. */
2033 extern unsigned const char omp_clause_num_ops
[];
2034 extern const char * const omp_clause_code_name
[];
2036 /* A vector of all translation-units. */
2037 extern GTY (()) vec
<tree
, va_gc
> *all_translation_units
;
2039 /* Vector of standard trees used by the C compiler. */
2040 extern GTY(()) tree global_trees
[TI_MAX
];
2042 /* The standard C integer types. Use integer_type_kind to index into
2044 extern GTY(()) tree integer_types
[itk_none
];
2046 /* Types used to represent sizes. */
2047 extern GTY(()) tree sizetype_tab
[(int) stk_type_kind_last
];
2049 /* Arrays for keeping track of tree node statistics. */
2050 extern int tree_node_counts
[];
2051 extern int tree_node_sizes
[];
2053 /* True if we are in gimple form and the actions of the folders need to
2054 be restricted. False if we are not in gimple form and folding is not
2055 restricted to creating gimple expressions. */
2056 extern bool in_gimple_form
;
2058 /* Functional interface to the builtin functions. */
2059 extern GTY(()) builtin_info_type builtin_info
[(int)END_BUILTINS
];
2061 /* If nonzero, an upper limit on alignment of structure fields, in bits, */
2062 extern unsigned int maximum_field_alignment
;
2064 /* Points to the FUNCTION_DECL of the function whose body we are reading. */
2065 extern GTY(()) tree current_function_decl
;
2067 /* Nonzero means a FUNC_BEGIN label was emitted. */
2068 extern GTY(()) const char * current_function_func_begin_label
;
2070 /* Information about the _FloatN and _FloatNx types. */
2071 extern const floatn_type_info floatn_nx_types
[NUM_FLOATN_NX_TYPES
];
2073 #endif // GCC_TREE_CORE_H