1 /* Core data structures for the 'tree' type.
2 Copyright (C) 1989-2013 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
26 #include "statistics.h"
28 #include "double-int.h"
30 #include "fixed-value.h"
35 /* This file contains all the data structures that define the 'tree' type.
36 There are no accessor macros nor functions in this file. Only the
37 basic data structures, extern declarations and type definitions. */
39 /*---------------------------------------------------------------------------
40 Forward type declarations. Mostly to avoid including unnecessary headers
41 ---------------------------------------------------------------------------*/
50 /*---------------------------------------------------------------------------
52 ---------------------------------------------------------------------------*/
53 /* Nonzero if this is a call to a function whose return value depends
54 solely on its arguments, has no side effects, and does not read
55 global memory. This corresponds to TREE_READONLY for function
57 #define ECF_CONST (1 << 0)
59 /* Nonzero if this is a call to "pure" function (like const function,
60 but may read memory. This corresponds to DECL_PURE_P for function
62 #define ECF_PURE (1 << 1)
64 /* Nonzero if this is ECF_CONST or ECF_PURE but cannot be proven to no
65 infinite loop. This corresponds to DECL_LOOPING_CONST_OR_PURE_P
67 #define ECF_LOOPING_CONST_OR_PURE (1 << 2)
69 /* Nonzero if this call will never return. */
70 #define ECF_NORETURN (1 << 3)
72 /* Nonzero if this is a call to malloc or a related function. */
73 #define ECF_MALLOC (1 << 4)
75 /* Nonzero if it is plausible that this is a call to alloca. */
76 #define ECF_MAY_BE_ALLOCA (1 << 5)
78 /* Nonzero if this is a call to a function that won't throw an exception. */
79 #define ECF_NOTHROW (1 << 6)
81 /* Nonzero if this is a call to setjmp or a related function. */
82 #define ECF_RETURNS_TWICE (1 << 7)
84 /* Nonzero if this call replaces the current stack frame. */
85 #define ECF_SIBCALL (1 << 8)
87 /* Function does not read or write memory (but may have side effects, so
88 it does not necessarily fit ECF_CONST). */
89 #define ECF_NOVOPS (1 << 9)
91 /* The function does not lead to calls within current function unit. */
92 #define ECF_LEAF (1 << 10)
94 /* Nonzero if this call does not affect transactions. */
95 #define ECF_TM_PURE (1 << 11)
97 /* Nonzero if this call is into the transaction runtime library. */
98 #define ECF_TM_BUILTIN (1 << 12)
100 /* Call argument flags. */
101 /* Nonzero if the argument is not dereferenced recursively, thus only
102 directly reachable memory is read or written. */
103 #define EAF_DIRECT (1 << 0)
105 /* Nonzero if memory reached by the argument is not clobbered. */
106 #define EAF_NOCLOBBER (1 << 1)
108 /* Nonzero if the argument does not escape. */
109 #define EAF_NOESCAPE (1 << 2)
111 /* Nonzero if the argument is not used by the function. */
112 #define EAF_UNUSED (1 << 3)
114 /* Call return flags. */
115 /* Mask for the argument number that is returned. Lower two bits of
116 the return flags, encodes argument slots zero to three. */
117 #define ERF_RETURN_ARG_MASK (3)
119 /* Nonzero if the return value is equal to the argument number
120 flags & ERF_RETURN_ARG_MASK. */
121 #define ERF_RETURNS_ARG (1 << 2)
123 /* Nonzero if the return value does not alias with anything. Functions
124 with the malloc attribute have this set on their return value. */
125 #define ERF_NOALIAS (1 << 3)
128 /*---------------------------------------------------------------------------
130 ---------------------------------------------------------------------------*/
131 /* Codes of tree nodes. */
132 #define DEFTREECODE(SYM, STRING, TYPE, NARGS) SYM,
133 #define END_OF_BASE_TREE_CODES LAST_AND_UNUSED_TREE_CODE,
136 #include "all-tree.def"
141 #undef END_OF_BASE_TREE_CODES
143 /* Number of language-independent tree codes. */
144 #define NUM_TREE_CODES \
145 ((int) LAST_AND_UNUSED_TREE_CODE)
147 #define CODE_CONTAINS_STRUCT(CODE, STRUCT) \
148 (tree_contains_struct[(CODE)][(STRUCT)])
151 /* Classify which part of the compiler has defined a given builtin function.
152 Note that we assume below that this is no more than two bits. */
153 enum built_in_class
{
160 /* Last marker used for LTO stremaing of built_in_class. We can not add it
161 to the enum since we need the enumb to fit in 2 bits. */
162 #define BUILT_IN_LAST (BUILT_IN_NORMAL + 1)
164 /* Codes that identify the various built in functions
165 so that expand_call can identify them quickly. */
166 #define DEF_BUILTIN(ENUM, N, C, T, LT, B, F, NA, AT, IM, COND) ENUM,
167 enum built_in_function
{
168 #include "builtins.def"
170 /* Complex division routines in libgcc. These are done via builtins
171 because emit_library_call_value can't handle complex values. */
172 BUILT_IN_COMPLEX_MUL_MIN
,
173 BUILT_IN_COMPLEX_MUL_MAX
174 = BUILT_IN_COMPLEX_MUL_MIN
175 + MAX_MODE_COMPLEX_FLOAT
176 - MIN_MODE_COMPLEX_FLOAT
,
178 BUILT_IN_COMPLEX_DIV_MIN
,
179 BUILT_IN_COMPLEX_DIV_MAX
180 = BUILT_IN_COMPLEX_DIV_MIN
181 + MAX_MODE_COMPLEX_FLOAT
182 - MIN_MODE_COMPLEX_FLOAT
,
184 /* Upper bound on non-language-specific builtins. */
189 /* Tree code classes. Each tree_code has an associated code class
190 represented by a TREE_CODE_CLASS. */
191 enum tree_code_class
{
192 tcc_exceptional
, /* An exceptional code (fits no category). */
193 tcc_constant
, /* A constant. */
194 /* Order of tcc_type and tcc_declaration is important. */
195 tcc_type
, /* A type object code. */
196 tcc_declaration
, /* A declaration (also serving as variable refs). */
197 tcc_reference
, /* A reference to storage. */
198 tcc_comparison
, /* A comparison expression. */
199 tcc_unary
, /* A unary arithmetic expression. */
200 tcc_binary
, /* A binary arithmetic expression. */
201 tcc_statement
, /* A statement expression, which have side effects
202 but usually no interesting value. */
203 tcc_vl_exp
, /* A function call or other expression with a
204 variable-length operand vector. */
205 tcc_expression
/* Any other expression. */
208 /* OMP_CLAUSE codes. Do not reorder, as this is used to index into
209 the tables omp_clause_num_ops and omp_clause_code_name. */
210 enum omp_clause_code
{
211 /* Clause zero is special-cased inside the parser
212 (c_parser_omp_variable_list). */
213 OMP_CLAUSE_ERROR
= 0,
215 /* OpenMP clause: private (variable_list). */
218 /* OpenMP clause: shared (variable_list). */
221 /* OpenMP clause: firstprivate (variable_list). */
222 OMP_CLAUSE_FIRSTPRIVATE
,
224 /* OpenMP clause: lastprivate (variable_list). */
225 OMP_CLAUSE_LASTPRIVATE
,
227 /* OpenMP clause: reduction (operator:variable_list).
228 OMP_CLAUSE_REDUCTION_CODE: The tree_code of the operator.
229 Operand 1: OMP_CLAUSE_REDUCTION_INIT: Stmt-list to initialize the var.
230 Operand 2: OMP_CLAUSE_REDUCTION_MERGE: Stmt-list to merge private var
232 Operand 3: OMP_CLAUSE_REDUCTION_PLACEHOLDER: A dummy VAR_DECL
233 placeholder used in OMP_CLAUSE_REDUCTION_{INIT,MERGE}. */
234 OMP_CLAUSE_REDUCTION
,
236 /* OpenMP clause: copyin (variable_list). */
239 /* OpenMP clause: copyprivate (variable_list). */
240 OMP_CLAUSE_COPYPRIVATE
,
242 /* OpenMP clause: linear (variable-list[:linear-step]). */
245 /* OpenMP clause: uniform (argument-list). */
248 /* OpenMP clause: if (scalar-expression). */
251 /* OpenMP clause: num_threads (integer-expression). */
252 OMP_CLAUSE_NUM_THREADS
,
254 /* OpenMP clause: schedule. */
257 /* OpenMP clause: nowait. */
260 /* OpenMP clause: ordered. */
263 /* OpenMP clause: default. */
266 /* OpenMP clause: collapse (constant-integer-expression). */
269 /* OpenMP clause: untied. */
272 /* OpenMP clause: final (scalar-expression). */
275 /* OpenMP clause: mergeable. */
276 OMP_CLAUSE_MERGEABLE
,
278 /* OpenMP clause: safelen (constant-integer-expression). */
281 /* Internally used only clause, holding SIMD uid. */
286 #define DEFTREESTRUCT(ENUM, NAME) ENUM,
287 enum tree_node_structure_enum
{
288 #include "treestruct.def"
293 enum omp_clause_schedule_kind
{
294 OMP_CLAUSE_SCHEDULE_STATIC
,
295 OMP_CLAUSE_SCHEDULE_DYNAMIC
,
296 OMP_CLAUSE_SCHEDULE_GUIDED
,
297 OMP_CLAUSE_SCHEDULE_AUTO
,
298 OMP_CLAUSE_SCHEDULE_RUNTIME
301 enum omp_clause_default_kind
{
302 OMP_CLAUSE_DEFAULT_UNSPECIFIED
,
303 OMP_CLAUSE_DEFAULT_SHARED
,
304 OMP_CLAUSE_DEFAULT_NONE
,
305 OMP_CLAUSE_DEFAULT_PRIVATE
,
306 OMP_CLAUSE_DEFAULT_FIRSTPRIVATE
309 /* There is a TYPE_QUAL value for each type qualifier. They can be
310 combined by bitwise-or to form the complete set of qualifiers for a
313 TYPE_UNQUALIFIED
= 0x0,
314 TYPE_QUAL_CONST
= 0x1,
315 TYPE_QUAL_VOLATILE
= 0x2,
316 TYPE_QUAL_RESTRICT
= 0x4
319 /* Enumerate visibility settings. */
320 #ifndef SYMBOL_VISIBILITY_DEFINED
321 #define SYMBOL_VISIBILITY_DEFINED
322 enum symbol_visibility
{
324 VISIBILITY_PROTECTED
,
328 #endif // SYMBOL_VISIBILITY_DEFINED
330 /* Standard named or nameless data types of the C compiler. */
352 TI_INTEGER_MINUS_ONE
,
369 TI_COMPLEX_INTEGER_TYPE
,
370 TI_COMPLEX_FLOAT_TYPE
,
371 TI_COMPLEX_DOUBLE_TYPE
,
372 TI_COMPLEX_LONG_DOUBLE_TYPE
,
380 TI_LONG_DOUBLE_PTR_TYPE
,
390 TI_VA_LIST_GPR_COUNTER_FIELD
,
391 TI_VA_LIST_FPR_COUNTER_FIELD
,
394 TI_POINTER_SIZED_TYPE
,
399 TI_DFLOAT32_PTR_TYPE
,
400 TI_DFLOAT64_PTR_TYPE
,
401 TI_DFLOAT128_PTR_TYPE
,
414 TI_SAT_ULLFRACT_TYPE
,
430 TI_SAT_ULLACCUM_TYPE
,
476 TI_OPTIMIZATION_DEFAULT
,
477 TI_OPTIMIZATION_CURRENT
,
478 TI_TARGET_OPTION_DEFAULT
,
479 TI_TARGET_OPTION_CURRENT
,
480 TI_CURRENT_TARGET_PRAGMA
,
481 TI_CURRENT_OPTIMIZE_PRAGMA
,
486 /* An enumeration of the standard C integer types. These must be
487 ordered so that shorter types appear before longer ones, and so
488 that signed types appear before unsigned ones, for the correct
489 functioning of interpret_integer() in c-lex.c. */
490 enum integer_type_kind
{
501 itk_unsigned_long_long
,
507 /* A pointer-to-function member type looks like:
514 If __pfn is NULL, it is a NULL pointer-to-member-function.
516 (Because the vtable is always the first thing in the object, we
517 don't need its offset.) If the function is virtual, then PFN is
518 one plus twice the index into the vtable; otherwise, it is just a
519 pointer to the function.
521 Unfortunately, using the lowest bit of PFN doesn't work in
522 architectures that don't impose alignment requirements on function
523 addresses, or that use the lowest bit to tell one ISA from another,
524 for example. For such architectures, we use the lowest bit of
525 DELTA instead of the lowest bit of the PFN, and DELTA will be
527 enum ptrmemfunc_vbit_where_t
{
528 ptrmemfunc_vbit_in_pfn
,
529 ptrmemfunc_vbit_in_delta
532 /* Flags that may be passed in the third argument of decl_attributes, and
533 to handler functions for attributes. */
534 enum attribute_flags
{
535 /* The type passed in is the type of a DECL, and any attributes that
536 should be passed in again to be applied to the DECL rather than the
537 type should be returned. */
538 ATTR_FLAG_DECL_NEXT
= 1,
539 /* The type passed in is a function return type, and any attributes that
540 should be passed in again to be applied to the function type rather
541 than the return type should be returned. */
542 ATTR_FLAG_FUNCTION_NEXT
= 2,
543 /* The type passed in is an array element type, and any attributes that
544 should be passed in again to be applied to the array type rather
545 than the element type should be returned. */
546 ATTR_FLAG_ARRAY_NEXT
= 4,
547 /* The type passed in is a structure, union or enumeration type being
548 created, and should be modified in place. */
549 ATTR_FLAG_TYPE_IN_PLACE
= 8,
550 /* The attributes are being applied by default to a library function whose
551 name indicates known behavior, and should be silently ignored if they
552 are not in fact compatible with the function type. */
553 ATTR_FLAG_BUILT_IN
= 16,
554 /* A given attribute has been parsed as a C++-11 attribute. */
558 /* Types used to represent sizes. */
559 enum size_type_kind
{
560 stk_sizetype
, /* Normal representation of sizes in bytes. */
561 stk_ssizetype
, /* Signed representation of sizes in bytes. */
562 stk_bitsizetype
, /* Normal representation of sizes in bits. */
563 stk_sbitsizetype
, /* Signed representation of sizes in bits. */
567 enum operand_equal_flag
{
570 OEP_CONSTANT_ADDRESS_OF
= 4
573 /* Enum and arrays used for tree allocation stats.
574 Keep in sync with tree.c:tree_node_kind_names. */
575 enum tree_node_kind
{
596 /*---------------------------------------------------------------------------
598 ---------------------------------------------------------------------------*/
599 /* When processing aliases at the symbol table level, we need the
600 declaration of target. For this reason we need to queue aliases and
601 process them after all declarations has been produced. */
602 typedef struct GTY(()) alias_pair
{
607 /* An initialization priority. */
608 typedef unsigned short priority_type
;
610 /* The type of a callback function for walking over tree structure. */
611 typedef tree (*walk_tree_fn
) (tree
*, int *, void *);
613 /* The type of a callback function that represents a custom walk_tree. */
614 typedef tree (*walk_tree_lh
) (tree
*, int *, tree (*) (tree
*, int *, void *),
615 void *, struct pointer_set_t
*);
618 /*---------------------------------------------------------------------------
620 ---------------------------------------------------------------------------*/
621 /* A tree node can represent a data type, a variable, an expression
622 or a statement. Each node has a TREE_CODE which says what kind of
623 thing it represents. Some common codes are:
624 INTEGER_TYPE -- represents a type of integers.
625 ARRAY_TYPE -- represents a type of pointer.
626 VAR_DECL -- represents a declared variable.
627 INTEGER_CST -- represents a constant integer value.
628 PLUS_EXPR -- represents a sum (an expression).
630 As for the contents of a tree node: there are some fields
631 that all nodes share. Each TREE_CODE has various special-purpose
632 fields as well. The fields of a node are never accessed directly,
633 always through accessor macros. */
635 /* Every kind of tree node starts with this structure,
636 so all nodes have these fields.
638 See the accessor macros, defined below, for documentation of the
639 fields, and the table below which connects the fields and the
642 struct GTY(()) tree_base
{
643 ENUM_BITFIELD(tree_code
) code
: 16;
645 unsigned side_effects_flag
: 1;
646 unsigned constant_flag
: 1;
647 unsigned addressable_flag
: 1;
648 unsigned volatile_flag
: 1;
649 unsigned readonly_flag
: 1;
650 unsigned asm_written_flag
: 1;
651 unsigned nowarning_flag
: 1;
652 unsigned visited
: 1;
654 unsigned used_flag
: 1;
655 unsigned nothrow_flag
: 1;
656 unsigned static_flag
: 1;
657 unsigned public_flag
: 1;
658 unsigned private_flag
: 1;
659 unsigned protected_flag
: 1;
660 unsigned deprecated_flag
: 1;
661 unsigned default_def_flag
: 1;
664 /* The bits in the following structure should only be used with
665 accessor macros that constrain inputs with tree checking. */
667 unsigned lang_flag_0
: 1;
668 unsigned lang_flag_1
: 1;
669 unsigned lang_flag_2
: 1;
670 unsigned lang_flag_3
: 1;
671 unsigned lang_flag_4
: 1;
672 unsigned lang_flag_5
: 1;
673 unsigned lang_flag_6
: 1;
674 unsigned saturating_flag
: 1;
676 unsigned unsigned_flag
: 1;
677 unsigned packed_flag
: 1;
678 unsigned user_align
: 1;
679 unsigned nameless_flag
: 1;
684 /* This field is only used with TREE_TYPE nodes; the only reason it is
685 present in tree_base instead of tree_type is to save space. The size
686 of the field must be large enough to hold addr_space_t values. */
687 unsigned address_space
: 8;
689 /* The following fields are present in tree_base to save space. The
690 nodes using them do not require any of the flags above and so can
691 make better use of the 4-byte sized word. */
692 /* VEC length. This field is only used with TREE_VEC. */
694 /* SSA version number. This field is only used with SSA_NAME. */
695 unsigned int version
;
699 /* The following table lists the uses of each of the above flags and
700 for which types of nodes they are defined.
705 VAR_DECL, PARM_DECL, RESULT_DECL, FUNCTION_DECL, LABEL_DECL
708 CONSTRUCTOR, IDENTIFIER_NODE
711 CALL_EXPR_TAILCALL in
717 PREDICT_EXPR_OUTCOME in
723 VAR_DECL, FUNCTION_DECL
726 TREE_NO_TRAMPOLINE in
732 TREE_SYMBOL_REFERENCED in
736 TARGET_EXPR, WITH_CLEANUP_EXPR
738 TRY_CATCH_IS_CLEANUP in
744 TYPE_REF_CAN_ALIAS_ALL in
745 POINTER_TYPE, REFERENCE_TYPE
753 TRANSACTION_EXPR_OUTER in
759 INTEGER_CST, REAL_CST, COMPLEX_CST, VECTOR_CST
762 VAR_DECL, FUNCTION_DECL
768 CALL_EXPR_VA_ARG_PACK in
771 TYPE_CACHED_VALUES_P in
774 SAVE_EXPR_RESOLVED_P in
777 OMP_CLAUSE_LASTPRIVATE_FIRSTPRIVATE in
778 OMP_CLAUSE_LASTPRIVATE
780 OMP_CLAUSE_PRIVATE_DEBUG in
783 OMP_CLAUSE_LINEAR_NO_COPYIN in
786 TRANSACTION_EXPR_RELAXED in
794 CALL_EXPR_RETURN_SLOT_OPT in
800 OMP_PARALLEL_COMBINED in
803 OMP_CLAUSE_PRIVATE_OUTER_REF in
806 OMP_CLAUSE_LINEAR_NO_COPYOUT in
809 TYPE_REF_IS_RVALUE in
821 CALL_FROM_THUNK_P and
822 CALL_ALLOCA_FOR_VAR_P in
837 TREE_THIS_VOLATILE in
860 TYPE_SIZES_GIMPLIFIED in
874 VAR_DECL, FUNCTION_DECL, TYPE_DECL
875 RECORD_TYPE, UNION_TYPE, QUAL_UNION_TYPE
878 SSA_NAME_OCCURS_IN_ABNORMAL_PHI in
898 INDIRECT_REF, MEM_REF, TARGET_MEM_REF, ARRAY_REF, ARRAY_RANGE_REF
900 SSA_NAME_IN_FREELIST in
909 IDENTIFIER_TRANSPARENT_ALIAS in
915 all trees (used liberally by many passes)
922 VAR_DECL_IS_VIRTUAL_OPERAND in
936 TYPE_VECTOR_OPAQUE in
939 SSA_NAME_IS_DEFAULT_DEF in
942 DECL_NONLOCAL_FRAME in
946 RECORD_TYPE, UNION_TYPE and QUAL_UNION_TYPE
949 struct GTY(()) tree_typed
{
950 struct tree_base base
;
954 struct GTY(()) tree_common
{
955 struct tree_typed typed
;
959 struct GTY(()) tree_int_cst
{
960 struct tree_typed typed
;
965 struct GTY(()) tree_real_cst
{
966 struct tree_typed typed
;
967 struct real_value
* real_cst_ptr
;
970 struct GTY(()) tree_fixed_cst
{
971 struct tree_typed typed
;
972 struct fixed_value
* fixed_cst_ptr
;
975 struct GTY(()) tree_string
{
976 struct tree_typed typed
;
981 struct GTY(()) tree_complex
{
982 struct tree_typed typed
;
987 struct GTY(()) tree_vector
{
988 struct tree_typed typed
;
989 tree
GTY ((length ("TYPE_VECTOR_SUBPARTS (TREE_TYPE ((tree)&%h))"))) elts
[1];
992 struct GTY(()) tree_identifier
{
993 struct tree_common common
;
994 struct ht_identifier id
;
997 struct GTY(()) tree_list
{
998 struct tree_common common
;
1003 struct GTY(()) tree_vec
{
1004 struct tree_common common
;
1005 tree
GTY ((length ("TREE_VEC_LENGTH ((tree)&%h)"))) a
[1];
1008 /* A single element of a CONSTRUCTOR. VALUE holds the actual value of the
1009 element. INDEX can optionally design the position of VALUE: in arrays,
1010 it is the index where VALUE has to be placed; in structures, it is the
1011 FIELD_DECL of the member. */
1012 typedef struct GTY(()) constructor_elt_d
{
1017 struct GTY(()) tree_constructor
{
1018 struct tree_typed typed
;
1019 vec
<constructor_elt
, va_gc
> *elts
;
1022 struct GTY(()) tree_exp
{
1023 struct tree_typed typed
;
1025 tree
GTY ((special ("tree_exp"),
1026 desc ("TREE_CODE ((tree) &%0)")))
1030 /* Immediate use linking structure. This structure is used for maintaining
1031 a doubly linked list of uses of an SSA_NAME. */
1032 typedef struct GTY(()) ssa_use_operand_d
{
1033 struct ssa_use_operand_d
* GTY((skip(""))) prev
;
1034 struct ssa_use_operand_d
* GTY((skip(""))) next
;
1035 /* Immediate uses for a given SSA name are maintained as a cyclic
1036 list. To recognize the root of this list, the location field
1037 needs to point to the original SSA name. Since statements and
1038 SSA names are of different data types, we need this union. See
1039 the explanation in struct immediate_use_iterator_d. */
1040 union { gimple stmt
; tree ssa_name
; } GTY((skip(""))) loc
;
1041 tree
*GTY((skip(""))) use
;
1042 } ssa_use_operand_t
;
1044 struct GTY(()) tree_ssa_name
{
1045 struct tree_typed typed
;
1047 /* _DECL wrapped by this SSA name. */
1050 /* Statement that defines this SSA name. */
1053 /* Pointer attributes used for alias analysis. */
1054 struct ptr_info_def
*ptr_info
;
1056 /* Immediate uses list for this SSA_NAME. */
1057 struct ssa_use_operand_d imm_uses
;
1060 struct GTY(()) phi_arg_d
{
1061 /* imm_use MUST be the first element in struct because we do some
1062 pointer arithmetic with it. See phi_arg_index_from_use. */
1063 struct ssa_use_operand_d imm_use
;
1068 struct GTY(()) tree_omp_clause
{
1069 struct tree_common common
;
1071 enum omp_clause_code code
;
1072 union omp_clause_subcode
{
1073 enum omp_clause_default_kind default_kind
;
1074 enum omp_clause_schedule_kind schedule_kind
;
1075 enum tree_code reduction_code
;
1076 } GTY ((skip
)) subcode
;
1078 /* The gimplification of OMP_CLAUSE_REDUCTION_{INIT,MERGE} for omp-low's
1080 gimple_seq gimple_reduction_init
;
1081 gimple_seq gimple_reduction_merge
;
1083 tree
GTY ((length ("omp_clause_num_ops[OMP_CLAUSE_CODE ((tree)&%h)]")))
1087 struct GTY(()) tree_block
{
1088 struct tree_base base
;
1091 unsigned abstract_flag
: 1;
1092 unsigned block_num
: 31;
1097 vec
<tree
, va_gc
> *nonlocalized_vars
;
1101 tree abstract_origin
;
1102 tree fragment_origin
;
1103 tree fragment_chain
;
1106 struct GTY(()) tree_type_common
{
1107 struct tree_common common
;
1113 unsigned int precision
: 10;
1114 unsigned no_force_blk_flag
: 1;
1115 unsigned needs_constructing_flag
: 1;
1116 unsigned transparent_aggr_flag
: 1;
1117 unsigned restrict_flag
: 1;
1118 unsigned contains_placeholder_bits
: 2;
1120 ENUM_BITFIELD(machine_mode
) mode
: 8;
1122 unsigned string_flag
: 1;
1123 unsigned lang_flag_0
: 1;
1124 unsigned lang_flag_1
: 1;
1125 unsigned lang_flag_2
: 1;
1126 unsigned lang_flag_3
: 1;
1127 unsigned lang_flag_4
: 1;
1128 unsigned lang_flag_5
: 1;
1129 unsigned lang_flag_6
: 1;
1132 alias_set_type alias_set
;
1135 union tree_type_symtab
{
1136 int GTY ((tag ("TYPE_SYMTAB_IS_ADDRESS"))) address
;
1137 const char * GTY ((tag ("TYPE_SYMTAB_IS_POINTER"))) pointer
;
1138 struct die_struct
* GTY ((tag ("TYPE_SYMTAB_IS_DIE"))) die
;
1139 } GTY ((desc ("debug_hooks->tree_type_symtab_field"))) symtab
;
1147 struct GTY(()) tree_type_with_lang_specific
{
1148 struct tree_type_common common
;
1149 /* Points to a structure whose details depend on the language in use. */
1150 struct lang_type
*lang_specific
;
1153 struct GTY(()) tree_type_non_common
{
1154 struct tree_type_with_lang_specific with_lang_specific
;
1161 struct GTY (()) tree_binfo
{
1162 struct tree_common common
;
1168 vec
<tree
, va_gc
> *base_accesses
;
1174 vec
<tree
, va_gc
> base_binfos
;
1177 struct GTY(()) tree_decl_minimal
{
1178 struct tree_common common
;
1185 struct GTY(()) tree_decl_common
{
1186 struct tree_decl_minimal common
;
1189 ENUM_BITFIELD(machine_mode
) mode
: 8;
1191 unsigned nonlocal_flag
: 1;
1192 unsigned virtual_flag
: 1;
1193 unsigned ignored_flag
: 1;
1194 unsigned abstract_flag
: 1;
1195 unsigned artificial_flag
: 1;
1196 unsigned preserve_flag
: 1;
1197 unsigned debug_expr_is_from
: 1;
1199 unsigned lang_flag_0
: 1;
1200 unsigned lang_flag_1
: 1;
1201 unsigned lang_flag_2
: 1;
1202 unsigned lang_flag_3
: 1;
1203 unsigned lang_flag_4
: 1;
1204 unsigned lang_flag_5
: 1;
1205 unsigned lang_flag_6
: 1;
1206 unsigned lang_flag_7
: 1;
1207 unsigned lang_flag_8
: 1;
1209 /* In VAR_DECL and PARM_DECL, this is DECL_REGISTER. */
1210 unsigned decl_flag_0
: 1;
1211 /* In FIELD_DECL, this is DECL_BIT_FIELD
1212 In VAR_DECL and FUNCTION_DECL, this is DECL_EXTERNAL.
1213 In TYPE_DECL, this is TYPE_DECL_SUPPRESS_DEBUG. */
1214 unsigned decl_flag_1
: 1;
1215 /* In FIELD_DECL, this is DECL_NONADDRESSABLE_P
1216 In VAR_DECL, PARM_DECL and RESULT_DECL, this is
1217 DECL_HAS_VALUE_EXPR_P. */
1218 unsigned decl_flag_2
: 1;
1220 unsigned decl_flag_3
: 1;
1221 /* Logically, these two would go in a theoretical base shared by var and
1223 unsigned gimple_reg_flag
: 1;
1224 /* In VAR_DECL, PARM_DECL and RESULT_DECL, this is DECL_BY_REFERENCE. */
1225 unsigned decl_by_reference_flag
: 1;
1226 /* In a VAR_DECL and PARM_DECL, this is DECL_READ_P. */
1227 unsigned decl_read_flag
: 1;
1228 /* In a VAR_DECL or RESULT_DECL, this is DECL_NONSHAREABLE. */
1229 unsigned decl_nonshareable_flag
: 1;
1231 /* DECL_OFFSET_ALIGN, used only for FIELD_DECLs. */
1232 unsigned int off_align
: 8;
1234 /* 24 bits unused. */
1236 /* DECL_ALIGN. It should have the same size as TYPE_ALIGN. */
1239 /* UID for points-to sets, stable over copying from inlining. */
1240 unsigned int pt_uid
;
1245 tree abstract_origin
;
1247 /* Points to a structure whose details depend on the language in use. */
1248 struct lang_decl
*lang_specific
;
1251 struct GTY(()) tree_decl_with_rtl
{
1252 struct tree_decl_common common
;
1256 struct GTY(()) tree_field_decl
{
1257 struct tree_decl_common common
;
1260 tree bit_field_type
;
1266 struct GTY(()) tree_label_decl
{
1267 struct tree_decl_with_rtl common
;
1269 int eh_landing_pad_nr
;
1272 struct GTY(()) tree_result_decl
{
1273 struct tree_decl_with_rtl common
;
1276 struct GTY(()) tree_const_decl
{
1277 struct tree_decl_common common
;
1280 struct GTY(()) tree_parm_decl
{
1281 struct tree_decl_with_rtl common
;
1285 struct GTY(()) tree_decl_with_vis
{
1286 struct tree_decl_with_rtl common
;
1287 tree assembler_name
;
1291 /* Belong to VAR_DECL exclusively. */
1292 unsigned defer_output
: 1;
1293 unsigned hard_register
: 1;
1294 unsigned common_flag
: 1;
1295 unsigned in_text_section
: 1;
1296 unsigned in_constant_pool
: 1;
1297 unsigned dllimport_flag
: 1;
1298 /* Don't belong to VAR_DECL exclusively. */
1299 unsigned weak_flag
: 1;
1300 /* When SECTION_NAME is implied by -ffunction-section. */
1301 unsigned implicit_section_name_p
: 1;
1303 unsigned seen_in_bind_expr
: 1;
1304 unsigned comdat_flag
: 1;
1305 ENUM_BITFIELD(symbol_visibility
) visibility
: 2;
1306 unsigned visibility_specified
: 1;
1307 /* Belongs to VAR_DECL exclusively. */
1308 ENUM_BITFIELD(tls_model
) tls_model
: 3;
1310 /* Belong to FUNCTION_DECL exclusively. */
1311 unsigned init_priority_p
: 1;
1312 /* Used by C++ only. Might become a generic decl flag. */
1313 unsigned shadowed_for_var_p
: 1;
1314 /* Belong to FUNCTION_DECL exclusively. */
1315 unsigned cxx_constructor
: 1;
1316 /* Belong to FUNCTION_DECL exclusively. */
1317 unsigned cxx_destructor
: 1;
1318 /* Belong to FUNCTION_DECL exclusively. */
1320 /* 11 unused bits. */
1323 struct GTY(()) tree_var_decl
{
1324 struct tree_decl_with_vis common
;
1327 struct GTY(()) tree_decl_non_common
{
1328 struct tree_decl_with_vis common
;
1329 /* C++ uses this in namespaces. */
1331 /* C++ uses this in templates. */
1333 /* Almost all FE's use this. */
1335 /* C++ uses this in namespaces and function_decls. */
1339 /* FUNCTION_DECL inherits from DECL_NON_COMMON because of the use of the
1340 arguments/result/saved_tree fields by front ends. It was either inherit
1341 FUNCTION_DECL from non_common, or inherit non_common from FUNCTION_DECL,
1342 which seemed a bit strange. */
1344 struct GTY(()) tree_function_decl
{
1345 struct tree_decl_non_common common
;
1349 /* The personality function. Used for stack unwinding. */
1352 /* Function specific options that are used by this function. */
1353 tree function_specific_target
; /* target options */
1354 tree function_specific_optimization
; /* optimization options */
1356 /* In a FUNCTION_DECL for which DECL_BUILT_IN holds, this is
1357 DECL_FUNCTION_CODE. Otherwise unused.
1358 ??? The bitfield needs to be able to hold all target function
1360 ENUM_BITFIELD(built_in_function
) function_code
: 11;
1361 ENUM_BITFIELD(built_in_class
) built_in_class
: 2;
1363 unsigned static_ctor_flag
: 1;
1364 unsigned static_dtor_flag
: 1;
1365 unsigned uninlinable
: 1;
1367 unsigned possibly_inlined
: 1;
1368 unsigned novops_flag
: 1;
1369 unsigned returns_twice_flag
: 1;
1370 unsigned malloc_flag
: 1;
1371 unsigned operator_new_flag
: 1;
1372 unsigned declared_inline_flag
: 1;
1373 unsigned regdecl_flag
: 1;
1374 unsigned no_inline_warning_flag
: 1;
1376 unsigned no_instrument_function_entry_exit
: 1;
1377 unsigned no_limit_stack
: 1;
1378 unsigned disregard_inline_limits
: 1;
1379 unsigned pure_flag
: 1;
1380 unsigned looping_const_or_pure_flag
: 1;
1381 unsigned has_debug_args_flag
: 1;
1382 unsigned tm_clone_flag
: 1;
1383 unsigned versioned_function
: 1;
1387 struct GTY(()) tree_translation_unit_decl
{
1388 struct tree_decl_common common
;
1389 /* Source language of this translation unit. Used for DWARF output. */
1390 const char * GTY((skip(""))) language
;
1391 /* TODO: Non-optimization used to build this translation unit. */
1392 /* TODO: Root of a partial DWARF tree for global types and decls. */
1395 struct GTY(()) tree_type_decl
{
1396 struct tree_decl_non_common common
;
1400 struct GTY ((chain_next ("%h.next"), chain_prev ("%h.prev"))) tree_statement_list_node
1402 struct tree_statement_list_node
*prev
;
1403 struct tree_statement_list_node
*next
;
1407 struct GTY(()) tree_statement_list
1409 struct tree_typed typed
;
1410 struct tree_statement_list_node
*head
;
1411 struct tree_statement_list_node
*tail
;
1415 /* Optimization options used by a function. */
1417 struct GTY(()) tree_optimization_option
{
1418 struct tree_common common
;
1420 /* The optimization options used by the user. */
1421 struct cl_optimization opts
;
1423 /* Target optabs for this set of optimization options. This is of
1424 type `struct target_optabs *'. */
1425 unsigned char *GTY ((atomic
)) optabs
;
1427 /* The value of this_target_optabs against which the optabs above were
1429 struct target_optabs
*GTY ((skip
)) base_optabs
;
1432 /* Target options used by a function. */
1434 struct GTY(()) tree_target_option
{
1435 struct tree_common common
;
1437 /* The optimization options used by the user. */
1438 struct cl_target_option opts
;
1441 /* Define the overall contents of a tree node.
1442 It may be any of the structures declared above
1443 for various types of node. */
1444 union GTY ((ptr_alias (union lang_tree_node
),
1445 desc ("tree_node_structure (&%h)"), variable_size
)) tree_node
{
1446 struct tree_base
GTY ((tag ("TS_BASE"))) base
;
1447 struct tree_typed
GTY ((tag ("TS_TYPED"))) typed
;
1448 struct tree_common
GTY ((tag ("TS_COMMON"))) common
;
1449 struct tree_int_cst
GTY ((tag ("TS_INT_CST"))) int_cst
;
1450 struct tree_real_cst
GTY ((tag ("TS_REAL_CST"))) real_cst
;
1451 struct tree_fixed_cst
GTY ((tag ("TS_FIXED_CST"))) fixed_cst
;
1452 struct tree_vector
GTY ((tag ("TS_VECTOR"))) vector
;
1453 struct tree_string
GTY ((tag ("TS_STRING"))) string
;
1454 struct tree_complex
GTY ((tag ("TS_COMPLEX"))) complex;
1455 struct tree_identifier
GTY ((tag ("TS_IDENTIFIER"))) identifier
;
1456 struct tree_decl_minimal
GTY((tag ("TS_DECL_MINIMAL"))) decl_minimal
;
1457 struct tree_decl_common
GTY ((tag ("TS_DECL_COMMON"))) decl_common
;
1458 struct tree_decl_with_rtl
GTY ((tag ("TS_DECL_WRTL"))) decl_with_rtl
;
1459 struct tree_decl_non_common
GTY ((tag ("TS_DECL_NON_COMMON")))
1461 struct tree_parm_decl
GTY ((tag ("TS_PARM_DECL"))) parm_decl
;
1462 struct tree_decl_with_vis
GTY ((tag ("TS_DECL_WITH_VIS"))) decl_with_vis
;
1463 struct tree_var_decl
GTY ((tag ("TS_VAR_DECL"))) var_decl
;
1464 struct tree_field_decl
GTY ((tag ("TS_FIELD_DECL"))) field_decl
;
1465 struct tree_label_decl
GTY ((tag ("TS_LABEL_DECL"))) label_decl
;
1466 struct tree_result_decl
GTY ((tag ("TS_RESULT_DECL"))) result_decl
;
1467 struct tree_const_decl
GTY ((tag ("TS_CONST_DECL"))) const_decl
;
1468 struct tree_type_decl
GTY ((tag ("TS_TYPE_DECL"))) type_decl
;
1469 struct tree_function_decl
GTY ((tag ("TS_FUNCTION_DECL"))) function_decl
;
1470 struct tree_translation_unit_decl
GTY ((tag ("TS_TRANSLATION_UNIT_DECL")))
1471 translation_unit_decl
;
1472 struct tree_type_common
GTY ((tag ("TS_TYPE_COMMON"))) type_common
;
1473 struct tree_type_with_lang_specific
GTY ((tag ("TS_TYPE_WITH_LANG_SPECIFIC")))
1474 type_with_lang_specific
;
1475 struct tree_type_non_common
GTY ((tag ("TS_TYPE_NON_COMMON")))
1477 struct tree_list
GTY ((tag ("TS_LIST"))) list
;
1478 struct tree_vec
GTY ((tag ("TS_VEC"))) vec
;
1479 struct tree_exp
GTY ((tag ("TS_EXP"))) exp
;
1480 struct tree_ssa_name
GTY ((tag ("TS_SSA_NAME"))) ssa_name
;
1481 struct tree_block
GTY ((tag ("TS_BLOCK"))) block
;
1482 struct tree_binfo
GTY ((tag ("TS_BINFO"))) binfo
;
1483 struct tree_statement_list
GTY ((tag ("TS_STATEMENT_LIST"))) stmt_list
;
1484 struct tree_constructor
GTY ((tag ("TS_CONSTRUCTOR"))) constructor
;
1485 struct tree_omp_clause
GTY ((tag ("TS_OMP_CLAUSE"))) omp_clause
;
1486 struct tree_optimization_option
GTY ((tag ("TS_OPTIMIZATION"))) optimization
;
1487 struct tree_target_option
GTY ((tag ("TS_TARGET_OPTION"))) target_option
;
1490 /* Structure describing an attribute and a function to handle it. */
1491 struct attribute_spec
{
1492 /* The name of the attribute (without any leading or trailing __),
1493 or NULL to mark the end of a table of attributes. */
1495 /* The minimum length of the list of arguments of the attribute. */
1497 /* The maximum length of the list of arguments of the attribute
1498 (-1 for no maximum). */
1500 /* Whether this attribute requires a DECL. If it does, it will be passed
1501 from types of DECLs, function return types and array element types to
1502 the DECLs, function types and array types respectively; but when
1503 applied to a type in any other circumstances, it will be ignored with
1504 a warning. (If greater control is desired for a given attribute,
1505 this should be false, and the flags argument to the handler may be
1506 used to gain greater control in that case.) */
1508 /* Whether this attribute requires a type. If it does, it will be passed
1509 from a DECL to the type of that DECL. */
1511 /* Whether this attribute requires a function (or method) type. If it does,
1512 it will be passed from a function pointer type to the target type,
1513 and from a function return type (which is not itself a function
1514 pointer type) to the function type. */
1515 bool function_type_required
;
1516 /* Function to handle this attribute. NODE points to the node to which
1517 the attribute is to be applied. If a DECL, it should be modified in
1518 place; if a TYPE, a copy should be created. NAME is the name of the
1519 attribute (possibly with leading or trailing __). ARGS is the TREE_LIST
1520 of the arguments (which may be NULL). FLAGS gives further information
1521 about the context of the attribute. Afterwards, the attributes will
1522 be added to the DECL_ATTRIBUTES or TYPE_ATTRIBUTES, as appropriate,
1523 unless *NO_ADD_ATTRS is set to true (which should be done on error,
1524 as well as in any other cases when the attributes should not be added
1525 to the DECL or TYPE). Depending on FLAGS, any attributes to be
1526 applied to another type or DECL later may be returned;
1527 otherwise the return value should be NULL_TREE. This pointer may be
1528 NULL if no special handling is required beyond the checks implied
1529 by the rest of this structure. */
1530 tree (*handler
) (tree
*node
, tree name
, tree args
,
1531 int flags
, bool *no_add_attrs
);
1532 /* Specifies if attribute affects type's identity. */
1533 bool affects_type_identity
;
1536 /* These functions allow a front-end to perform a manual layout of a
1537 RECORD_TYPE. (For instance, if the placement of subsequent fields
1538 depends on the placement of fields so far.) Begin by calling
1539 start_record_layout. Then, call place_field for each of the
1540 fields. Then, call finish_record_layout. See layout_type for the
1541 default way in which these functions are used. */
1542 typedef struct record_layout_info_s
{
1543 /* The RECORD_TYPE that we are laying out. */
1545 /* The offset into the record so far, in bytes, not including bits in
1548 /* The last known alignment of SIZE. */
1549 unsigned int offset_align
;
1550 /* The bit position within the last OFFSET_ALIGN bits, in bits. */
1552 /* The alignment of the record so far, in bits. */
1553 unsigned int record_align
;
1554 /* The alignment of the record so far, ignoring #pragma pack and
1555 __attribute__ ((packed)), in bits. */
1556 unsigned int unpacked_align
;
1557 /* The previous field laid out. */
1559 /* The static variables (i.e., class variables, as opposed to
1560 instance variables) encountered in T. */
1561 vec
<tree
, va_gc
> *pending_statics
;
1562 /* Bits remaining in the current alignment group */
1563 int remaining_in_alignment
;
1564 /* True if we've seen a packed field that didn't have normal
1565 alignment anyway. */
1566 int packed_maybe_necessary
;
1567 } *record_layout_info
;
1569 /* Iterator for going through the function arguments. */
1570 struct function_args_iterator
{
1571 tree next
; /* TREE_LIST pointing to the next argument */
1574 /* Structures to map from a tree to another tree. */
1575 struct GTY(()) tree_map_base
{
1579 /* Map from a tree to another tree. */
1581 struct GTY(()) tree_map
{
1582 struct tree_map_base base
;
1587 /* Map from a decl tree to another tree. */
1588 struct GTY(()) tree_decl_map
{
1589 struct tree_map_base base
;
1593 /* Map from a tree to an int. */
1594 struct GTY(()) tree_int_map
{
1595 struct tree_map_base base
;
1599 /* Map from a tree to initialization/finalization priorities. */
1600 struct GTY(()) tree_priority_map
{
1601 struct tree_map_base base
;
1606 /* Map from a decl tree to a tree vector. */
1607 struct GTY(()) tree_vec_map
{
1608 struct tree_map_base base
;
1609 vec
<tree
, va_gc
> *to
;
1612 /* Abstract iterators for CALL_EXPRs. These static inline definitions
1613 have to go towards the end of tree.h so that union tree_node is fully
1614 defined by this point. */
1616 /* Structure containing iterator state. */
1617 struct call_expr_arg_iterator
{
1618 tree t
; /* the call_expr */
1619 int n
; /* argument count */
1620 int i
; /* next argument index */
1623 struct const_call_expr_arg_iterator
{
1624 const_tree t
; /* the call_expr */
1625 int n
; /* argument count */
1626 int i
; /* next argument index */
1629 /* The builtin_info structure holds the FUNCTION_DECL of the standard builtin
1630 function, and a flag that says if the function is available implicitly, or
1631 whether the user has to code explicit calls to __builtin_<xxx>. */
1632 struct GTY(()) builtin_info_type
{
1633 tree decl
[(int)END_BUILTINS
];
1634 bool implicit_p
[(int)END_BUILTINS
];
1638 /*---------------------------------------------------------------------------
1640 ---------------------------------------------------------------------------*/
1641 /* Matrix describing the structures contained in a given tree code. */
1642 extern unsigned char tree_contains_struct
[MAX_TREE_CODES
][64];
1644 /* Class of tree given its code. */
1645 extern const enum tree_code_class tree_code_type
[];
1647 /* Each tree code class has an associated string representation.
1648 These must correspond to the tree_code_class entries. */
1649 extern const char *const tree_code_class_strings
[];
1651 /* Number of argument-words in each kind of tree-node. */
1652 extern const unsigned char tree_code_length
[];
1654 /* Names of tree components. */
1655 extern const char *const tree_code_name
[];
1657 /* Vector of all alias pairs for global symbols. */
1658 extern GTY(()) vec
<alias_pair
, va_gc
> *alias_pairs
;
1660 /* Names of all the built_in classes. */
1661 extern const char *const built_in_class_names
[BUILT_IN_LAST
];
1663 /* Names of all the built_in functions. */
1664 extern const char * built_in_names
[(int) END_BUILTINS
];
1666 /* Number of operands and names for each OMP_CLAUSE node. */
1667 extern unsigned const char omp_clause_num_ops
[];
1668 extern const char * const omp_clause_code_name
[];
1670 /* A vector of all translation-units. */
1671 extern GTY (()) vec
<tree
, va_gc
> *all_translation_units
;
1673 /* Vector of standard trees used by the C compiler. */
1674 extern GTY(()) tree global_trees
[TI_MAX
];
1676 /* The standard C integer types. Use integer_type_kind to index into
1678 extern GTY(()) tree integer_types
[itk_none
];
1680 /* Types used to represent sizes. */
1681 extern GTY(()) tree sizetype_tab
[(int) stk_type_kind_last
];
1683 /* Arrays for keeping track of tree node statistics. */
1684 extern int tree_node_counts
[];
1685 extern int tree_node_sizes
[];
1687 /* True if we are in gimple form and the actions of the folders need to
1688 be restricted. False if we are not in gimple form and folding is not
1689 restricted to creating gimple expressions. */
1690 extern bool in_gimple_form
;
1692 /* Functional interface to the builtin functions. */
1693 extern GTY(()) builtin_info_type builtin_info
;
1695 /* If nonzero, an upper limit on alignment of structure fields, in bits, */
1696 extern unsigned int maximum_field_alignment
;
1698 /* Nonzero means lvalues are limited to those valid in pedantic ANSI C.
1699 Zero means allow extended lvalues. */
1700 extern int pedantic_lvalues
;
1702 /* Points to the FUNCTION_DECL of the function whose body we are reading. */
1703 extern GTY(()) tree current_function_decl
;
1705 /* Nonzero means a FUNC_BEGIN label was emitted. */
1706 extern GTY(()) const char * current_function_func_begin_label
;
1708 #endif // GCC_TREE_CORE_H