1 /* Core data structures for the 'tree' type.
2 Copyright (C) 1989-2014 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
27 #include "statistics.h"
29 #include "double-int.h"
31 #include "fixed-value.h"
36 /* This file contains all the data structures that define the 'tree' type.
37 There are no accessor macros nor functions in this file. Only the
38 basic data structures, extern declarations and type definitions. */
40 /*---------------------------------------------------------------------------
41 Forward type declarations. Mostly to avoid including unnecessary headers
42 ---------------------------------------------------------------------------*/
47 struct range_info_def
;
51 /*---------------------------------------------------------------------------
53 ---------------------------------------------------------------------------*/
54 /* Nonzero if this is a call to a function whose return value depends
55 solely on its arguments, has no side effects, and does not read
56 global memory. This corresponds to TREE_READONLY for function
58 #define ECF_CONST (1 << 0)
60 /* Nonzero if this is a call to "pure" function (like const function,
61 but may read memory. This corresponds to DECL_PURE_P for function
63 #define ECF_PURE (1 << 1)
65 /* Nonzero if this is ECF_CONST or ECF_PURE but cannot be proven to no
66 infinite loop. This corresponds to DECL_LOOPING_CONST_OR_PURE_P
68 #define ECF_LOOPING_CONST_OR_PURE (1 << 2)
70 /* Nonzero if this call will never return. */
71 #define ECF_NORETURN (1 << 3)
73 /* Nonzero if this is a call to malloc or a related function. */
74 #define ECF_MALLOC (1 << 4)
76 /* Nonzero if it is plausible that this is a call to alloca. */
77 #define ECF_MAY_BE_ALLOCA (1 << 5)
79 /* Nonzero if this is a call to a function that won't throw an exception. */
80 #define ECF_NOTHROW (1 << 6)
82 /* Nonzero if this is a call to setjmp or a related function. */
83 #define ECF_RETURNS_TWICE (1 << 7)
85 /* Nonzero if this call replaces the current stack frame. */
86 #define ECF_SIBCALL (1 << 8)
88 /* Function does not read or write memory (but may have side effects, so
89 it does not necessarily fit ECF_CONST). */
90 #define ECF_NOVOPS (1 << 9)
92 /* The function does not lead to calls within current function unit. */
93 #define ECF_LEAF (1 << 10)
95 /* Nonzero if this call does not affect transactions. */
96 #define ECF_TM_PURE (1 << 11)
98 /* Nonzero if this call is into the transaction runtime library. */
99 #define ECF_TM_BUILTIN (1 << 12)
101 /* Call argument flags. */
102 /* Nonzero if the argument is not dereferenced recursively, thus only
103 directly reachable memory is read or written. */
104 #define EAF_DIRECT (1 << 0)
106 /* Nonzero if memory reached by the argument is not clobbered. */
107 #define EAF_NOCLOBBER (1 << 1)
109 /* Nonzero if the argument does not escape. */
110 #define EAF_NOESCAPE (1 << 2)
112 /* Nonzero if the argument is not used by the function. */
113 #define EAF_UNUSED (1 << 3)
115 /* Call return flags. */
116 /* Mask for the argument number that is returned. Lower two bits of
117 the return flags, encodes argument slots zero to three. */
118 #define ERF_RETURN_ARG_MASK (3)
120 /* Nonzero if the return value is equal to the argument number
121 flags & ERF_RETURN_ARG_MASK. */
122 #define ERF_RETURNS_ARG (1 << 2)
124 /* Nonzero if the return value does not alias with anything. Functions
125 with the malloc attribute have this set on their return value. */
126 #define ERF_NOALIAS (1 << 3)
129 /*---------------------------------------------------------------------------
131 ---------------------------------------------------------------------------*/
132 /* Codes of tree nodes. */
133 #define DEFTREECODE(SYM, STRING, TYPE, NARGS) SYM,
134 #define END_OF_BASE_TREE_CODES LAST_AND_UNUSED_TREE_CODE,
137 #include "all-tree.def"
142 #undef END_OF_BASE_TREE_CODES
144 /* Number of language-independent tree codes. */
145 #define NUM_TREE_CODES \
146 ((int) LAST_AND_UNUSED_TREE_CODE)
148 #define CODE_CONTAINS_STRUCT(CODE, STRUCT) \
149 (tree_contains_struct[(CODE)][(STRUCT)])
152 /* Classify which part of the compiler has defined a given builtin function.
153 Note that we assume below that this is no more than two bits. */
154 enum built_in_class
{
161 /* Last marker used for LTO stremaing of built_in_class. We can not add it
162 to the enum since we need the enumb to fit in 2 bits. */
163 #define BUILT_IN_LAST (BUILT_IN_NORMAL + 1)
165 /* Codes that identify the various built in functions
166 so that expand_call can identify them quickly. */
167 #define DEF_BUILTIN(ENUM, N, C, T, LT, B, F, NA, AT, IM, COND) ENUM,
168 enum built_in_function
{
169 #include "builtins.def"
174 #define DEF_BUILTIN(ENUM, N, C, T, LT, B, F, NA, AT, IM, COND) ENUM##_CHKP,
175 #include "builtins.def"
179 /* Complex division routines in libgcc. These are done via builtins
180 because emit_library_call_value can't handle complex values. */
181 BUILT_IN_COMPLEX_MUL_MIN
,
182 BUILT_IN_COMPLEX_MUL_MAX
183 = BUILT_IN_COMPLEX_MUL_MIN
184 + MAX_MODE_COMPLEX_FLOAT
185 - MIN_MODE_COMPLEX_FLOAT
,
187 BUILT_IN_COMPLEX_DIV_MIN
,
188 BUILT_IN_COMPLEX_DIV_MAX
189 = BUILT_IN_COMPLEX_DIV_MIN
190 + MAX_MODE_COMPLEX_FLOAT
191 - MIN_MODE_COMPLEX_FLOAT
,
193 /* Upper bound on non-language-specific builtins. */
198 /* Tree code classes. Each tree_code has an associated code class
199 represented by a TREE_CODE_CLASS. */
200 enum tree_code_class
{
201 tcc_exceptional
, /* An exceptional code (fits no category). */
202 tcc_constant
, /* A constant. */
203 /* Order of tcc_type and tcc_declaration is important. */
204 tcc_type
, /* A type object code. */
205 tcc_declaration
, /* A declaration (also serving as variable refs). */
206 tcc_reference
, /* A reference to storage. */
207 tcc_comparison
, /* A comparison expression. */
208 tcc_unary
, /* A unary arithmetic expression. */
209 tcc_binary
, /* A binary arithmetic expression. */
210 tcc_statement
, /* A statement expression, which have side effects
211 but usually no interesting value. */
212 tcc_vl_exp
, /* A function call or other expression with a
213 variable-length operand vector. */
214 tcc_expression
/* Any other expression. */
217 /* OMP_CLAUSE codes. Do not reorder, as this is used to index into
218 the tables omp_clause_num_ops and omp_clause_code_name. */
219 enum omp_clause_code
{
220 /* Clause zero is special-cased inside the parser
221 (c_parser_omp_variable_list). */
222 OMP_CLAUSE_ERROR
= 0,
224 /* OpenMP clause: private (variable_list). */
227 /* OpenMP clause: shared (variable_list). */
230 /* OpenMP clause: firstprivate (variable_list). */
231 OMP_CLAUSE_FIRSTPRIVATE
,
233 /* OpenMP clause: lastprivate (variable_list). */
234 OMP_CLAUSE_LASTPRIVATE
,
236 /* OpenMP clause: reduction (operator:variable_list).
237 OMP_CLAUSE_REDUCTION_CODE: The tree_code of the operator.
238 Operand 1: OMP_CLAUSE_REDUCTION_INIT: Stmt-list to initialize the var.
239 Operand 2: OMP_CLAUSE_REDUCTION_MERGE: Stmt-list to merge private var
241 Operand 3: OMP_CLAUSE_REDUCTION_PLACEHOLDER: A dummy VAR_DECL
242 placeholder used in OMP_CLAUSE_REDUCTION_{INIT,MERGE}. */
243 OMP_CLAUSE_REDUCTION
,
245 /* OpenMP clause: copyin (variable_list). */
248 /* OpenMP clause: copyprivate (variable_list). */
249 OMP_CLAUSE_COPYPRIVATE
,
251 /* OpenMP clause: linear (variable-list[:linear-step]). */
254 /* OpenMP clause: aligned (variable-list[:alignment]). */
257 /* OpenMP clause: depend ({in,out,inout}:variable-list). */
260 /* OpenMP clause: uniform (argument-list). */
263 /* OpenMP clause: from (variable-list). */
266 /* OpenMP clause: to (variable-list). */
269 /* OpenMP clause: map ({alloc:,to:,from:,tofrom:,}variable-list). */
272 /* Internal clause: temporary for combined loops expansion. */
273 OMP_CLAUSE__LOOPTEMP_
,
275 /* OpenMP clause: if (scalar-expression). */
278 /* OpenMP clause: num_threads (integer-expression). */
279 OMP_CLAUSE_NUM_THREADS
,
281 /* OpenMP clause: schedule. */
284 /* OpenMP clause: nowait. */
287 /* OpenMP clause: ordered. */
290 /* OpenMP clause: default. */
293 /* OpenMP clause: collapse (constant-integer-expression). */
296 /* OpenMP clause: untied. */
299 /* OpenMP clause: final (scalar-expression). */
302 /* OpenMP clause: mergeable. */
303 OMP_CLAUSE_MERGEABLE
,
305 /* OpenMP clause: device (integer-expression). */
308 /* OpenMP clause: dist_schedule (static[:chunk-size]). */
309 OMP_CLAUSE_DIST_SCHEDULE
,
311 /* OpenMP clause: inbranch. */
314 /* OpenMP clause: notinbranch. */
315 OMP_CLAUSE_NOTINBRANCH
,
317 /* OpenMP clause: num_teams(integer-expression). */
318 OMP_CLAUSE_NUM_TEAMS
,
320 /* OpenMP clause: thread_limit(integer-expression). */
321 OMP_CLAUSE_THREAD_LIMIT
,
323 /* OpenMP clause: proc_bind ({master,close,spread}). */
324 OMP_CLAUSE_PROC_BIND
,
326 /* OpenMP clause: safelen (constant-integer-expression). */
329 /* OpenMP clause: simdlen (constant-integer-expression). */
332 /* OpenMP clause: for. */
335 /* OpenMP clause: parallel. */
338 /* OpenMP clause: sections. */
341 /* OpenMP clause: taskgroup. */
342 OMP_CLAUSE_TASKGROUP
,
344 /* Internally used only clause, holding SIMD uid. */
345 OMP_CLAUSE__SIMDUID_
,
347 /* Internally used only clause, holding _Cilk_for # of iterations
349 OMP_CLAUSE__CILK_FOR_COUNT_
353 #define DEFTREESTRUCT(ENUM, NAME) ENUM,
354 enum tree_node_structure_enum
{
355 #include "treestruct.def"
360 enum omp_clause_schedule_kind
{
361 OMP_CLAUSE_SCHEDULE_STATIC
,
362 OMP_CLAUSE_SCHEDULE_DYNAMIC
,
363 OMP_CLAUSE_SCHEDULE_GUIDED
,
364 OMP_CLAUSE_SCHEDULE_AUTO
,
365 OMP_CLAUSE_SCHEDULE_RUNTIME
,
366 OMP_CLAUSE_SCHEDULE_CILKFOR
,
367 OMP_CLAUSE_SCHEDULE_LAST
370 enum omp_clause_default_kind
{
371 OMP_CLAUSE_DEFAULT_UNSPECIFIED
,
372 OMP_CLAUSE_DEFAULT_SHARED
,
373 OMP_CLAUSE_DEFAULT_NONE
,
374 OMP_CLAUSE_DEFAULT_PRIVATE
,
375 OMP_CLAUSE_DEFAULT_FIRSTPRIVATE
,
376 OMP_CLAUSE_DEFAULT_LAST
379 /* There is a TYPE_QUAL value for each type qualifier. They can be
380 combined by bitwise-or to form the complete set of qualifiers for a
383 TYPE_UNQUALIFIED
= 0x0,
384 TYPE_QUAL_CONST
= 0x1,
385 TYPE_QUAL_VOLATILE
= 0x2,
386 TYPE_QUAL_RESTRICT
= 0x4,
387 TYPE_QUAL_ATOMIC
= 0x8
390 /* Enumerate visibility settings. */
391 #ifndef SYMBOL_VISIBILITY_DEFINED
392 #define SYMBOL_VISIBILITY_DEFINED
393 enum symbol_visibility
{
395 VISIBILITY_PROTECTED
,
399 #endif // SYMBOL_VISIBILITY_DEFINED
401 /* Standard named or nameless data types of the C compiler. */
431 TI_INTEGER_MINUS_ONE
,
448 TI_COMPLEX_INTEGER_TYPE
,
449 TI_COMPLEX_FLOAT_TYPE
,
450 TI_COMPLEX_DOUBLE_TYPE
,
451 TI_COMPLEX_LONG_DOUBLE_TYPE
,
459 TI_LONG_DOUBLE_PTR_TYPE
,
469 TI_VA_LIST_GPR_COUNTER_FIELD
,
470 TI_VA_LIST_FPR_COUNTER_FIELD
,
473 TI_POINTER_SIZED_TYPE
,
475 TI_POINTER_BOUNDS_TYPE
,
480 TI_DFLOAT32_PTR_TYPE
,
481 TI_DFLOAT64_PTR_TYPE
,
482 TI_DFLOAT128_PTR_TYPE
,
495 TI_SAT_ULLFRACT_TYPE
,
511 TI_SAT_ULLACCUM_TYPE
,
557 TI_OPTIMIZATION_DEFAULT
,
558 TI_OPTIMIZATION_CURRENT
,
559 TI_TARGET_OPTION_DEFAULT
,
560 TI_TARGET_OPTION_CURRENT
,
561 TI_CURRENT_TARGET_PRAGMA
,
562 TI_CURRENT_OPTIMIZE_PRAGMA
,
567 /* An enumeration of the standard C integer types. These must be
568 ordered so that shorter types appear before longer ones, and so
569 that signed types appear before unsigned ones, for the correct
570 functioning of interpret_integer() in c-lex.c. */
571 enum integer_type_kind
{
582 itk_unsigned_long_long
,
596 /* A pointer-to-function member type looks like:
603 If __pfn is NULL, it is a NULL pointer-to-member-function.
605 (Because the vtable is always the first thing in the object, we
606 don't need its offset.) If the function is virtual, then PFN is
607 one plus twice the index into the vtable; otherwise, it is just a
608 pointer to the function.
610 Unfortunately, using the lowest bit of PFN doesn't work in
611 architectures that don't impose alignment requirements on function
612 addresses, or that use the lowest bit to tell one ISA from another,
613 for example. For such architectures, we use the lowest bit of
614 DELTA instead of the lowest bit of the PFN, and DELTA will be
616 enum ptrmemfunc_vbit_where_t
{
617 ptrmemfunc_vbit_in_pfn
,
618 ptrmemfunc_vbit_in_delta
621 /* Flags that may be passed in the third argument of decl_attributes, and
622 to handler functions for attributes. */
623 enum attribute_flags
{
624 /* The type passed in is the type of a DECL, and any attributes that
625 should be passed in again to be applied to the DECL rather than the
626 type should be returned. */
627 ATTR_FLAG_DECL_NEXT
= 1,
628 /* The type passed in is a function return type, and any attributes that
629 should be passed in again to be applied to the function type rather
630 than the return type should be returned. */
631 ATTR_FLAG_FUNCTION_NEXT
= 2,
632 /* The type passed in is an array element type, and any attributes that
633 should be passed in again to be applied to the array type rather
634 than the element type should be returned. */
635 ATTR_FLAG_ARRAY_NEXT
= 4,
636 /* The type passed in is a structure, union or enumeration type being
637 created, and should be modified in place. */
638 ATTR_FLAG_TYPE_IN_PLACE
= 8,
639 /* The attributes are being applied by default to a library function whose
640 name indicates known behavior, and should be silently ignored if they
641 are not in fact compatible with the function type. */
642 ATTR_FLAG_BUILT_IN
= 16,
643 /* A given attribute has been parsed as a C++-11 attribute. */
647 /* Types used to represent sizes. */
648 enum size_type_kind
{
649 stk_sizetype
, /* Normal representation of sizes in bytes. */
650 stk_ssizetype
, /* Signed representation of sizes in bytes. */
651 stk_bitsizetype
, /* Normal representation of sizes in bits. */
652 stk_sbitsizetype
, /* Signed representation of sizes in bits. */
656 enum operand_equal_flag
{
659 OEP_CONSTANT_ADDRESS_OF
= 4
662 /* Enum and arrays used for tree allocation stats.
663 Keep in sync with tree.c:tree_node_kind_names. */
664 enum tree_node_kind
{
684 enum annot_expr_kind
{
685 annot_expr_ivdep_kind
,
686 annot_expr_no_vector_kind
,
687 annot_expr_vector_kind
,
691 /* Internal functions. */
693 #define DEF_INTERNAL_FN(CODE, FLAGS, FNSPEC) IFN_##CODE,
694 #include "internal-fn.def"
695 #undef DEF_INTERNAL_FN
699 /*---------------------------------------------------------------------------
701 ---------------------------------------------------------------------------*/
702 /* When processing aliases at the symbol table level, we need the
703 declaration of target. For this reason we need to queue aliases and
704 process them after all declarations has been produced. */
705 struct GTY(()) alias_pair
{
710 /* An initialization priority. */
711 typedef unsigned short priority_type
;
713 /* The type of a callback function for walking over tree structure. */
714 typedef tree (*walk_tree_fn
) (tree
*, int *, void *);
716 /* The type of a callback function that represents a custom walk_tree. */
717 typedef tree (*walk_tree_lh
) (tree
*, int *, tree (*) (tree
*, int *, void *),
718 void *, hash_set
<tree
> *);
721 /*---------------------------------------------------------------------------
723 ---------------------------------------------------------------------------*/
724 /* A tree node can represent a data type, a variable, an expression
725 or a statement. Each node has a TREE_CODE which says what kind of
726 thing it represents. Some common codes are:
727 INTEGER_TYPE -- represents a type of integers.
728 ARRAY_TYPE -- represents a type of pointer.
729 VAR_DECL -- represents a declared variable.
730 INTEGER_CST -- represents a constant integer value.
731 PLUS_EXPR -- represents a sum (an expression).
733 As for the contents of a tree node: there are some fields
734 that all nodes share. Each TREE_CODE has various special-purpose
735 fields as well. The fields of a node are never accessed directly,
736 always through accessor macros. */
738 /* Every kind of tree node starts with this structure,
739 so all nodes have these fields.
741 See the accessor macros, defined below, for documentation of the
742 fields, and the table below which connects the fields and the
745 struct GTY(()) tree_base
{
746 ENUM_BITFIELD(tree_code
) code
: 16;
748 unsigned side_effects_flag
: 1;
749 unsigned constant_flag
: 1;
750 unsigned addressable_flag
: 1;
751 unsigned volatile_flag
: 1;
752 unsigned readonly_flag
: 1;
753 unsigned asm_written_flag
: 1;
754 unsigned nowarning_flag
: 1;
755 unsigned visited
: 1;
757 unsigned used_flag
: 1;
758 unsigned nothrow_flag
: 1;
759 unsigned static_flag
: 1;
760 unsigned public_flag
: 1;
761 unsigned private_flag
: 1;
762 unsigned protected_flag
: 1;
763 unsigned deprecated_flag
: 1;
764 unsigned default_def_flag
: 1;
767 /* The bits in the following structure should only be used with
768 accessor macros that constrain inputs with tree checking. */
770 unsigned lang_flag_0
: 1;
771 unsigned lang_flag_1
: 1;
772 unsigned lang_flag_2
: 1;
773 unsigned lang_flag_3
: 1;
774 unsigned lang_flag_4
: 1;
775 unsigned lang_flag_5
: 1;
776 unsigned lang_flag_6
: 1;
777 unsigned saturating_flag
: 1;
779 unsigned unsigned_flag
: 1;
780 unsigned packed_flag
: 1;
781 unsigned user_align
: 1;
782 unsigned nameless_flag
: 1;
783 unsigned atomic_flag
: 1;
788 /* This field is only used with TREE_TYPE nodes; the only reason it is
789 present in tree_base instead of tree_type is to save space. The size
790 of the field must be large enough to hold addr_space_t values. */
791 unsigned address_space
: 8;
794 /* The following fields are present in tree_base to save space. The
795 nodes using them do not require any of the flags above and so can
796 make better use of the 4-byte sized word. */
798 /* The number of HOST_WIDE_INTs in an INTEGER_CST. */
800 /* The number of HOST_WIDE_INTs if the INTEGER_CST is accessed in
801 its native precision. */
802 unsigned char unextended
;
804 /* The number of HOST_WIDE_INTs if the INTEGER_CST is extended to
805 wider precisions based on its TYPE_SIGN. */
806 unsigned char extended
;
808 /* The number of HOST_WIDE_INTs if the INTEGER_CST is accessed in
809 offset_int precision, with smaller integers being extended
810 according to their TYPE_SIGN. This is equal to one of the two
811 fields above but is cached for speed. */
812 unsigned char offset
;
815 /* VEC length. This field is only used with TREE_VEC. */
818 /* SSA version number. This field is only used with SSA_NAME. */
819 unsigned int version
;
821 /* Internal function code. */
822 enum internal_fn ifn
;
826 /* The following table lists the uses of each of the above flags and
827 for which types of nodes they are defined.
832 VAR_DECL, PARM_DECL, RESULT_DECL, FUNCTION_DECL, LABEL_DECL
835 CONSTRUCTOR, IDENTIFIER_NODE
838 CALL_EXPR_TAILCALL in
844 PREDICT_EXPR_OUTCOME in
850 VAR_DECL, FUNCTION_DECL
853 TREE_NO_TRAMPOLINE in
859 TREE_SYMBOL_REFERENCED in
863 TARGET_EXPR, WITH_CLEANUP_EXPR
865 TRY_CATCH_IS_CLEANUP in
871 TYPE_REF_CAN_ALIAS_ALL in
872 POINTER_TYPE, REFERENCE_TYPE
880 TRANSACTION_EXPR_OUTER in
883 SSA_NAME_ANTI_RANGE_P in
889 INTEGER_CST, REAL_CST, COMPLEX_CST, VECTOR_CST
892 VAR_DECL, FUNCTION_DECL
895 CONSTRUCTOR_NO_CLEARING in
901 CALL_EXPR_VA_ARG_PACK in
904 TYPE_CACHED_VALUES_P in
907 SAVE_EXPR_RESOLVED_P in
910 OMP_CLAUSE_LASTPRIVATE_FIRSTPRIVATE in
911 OMP_CLAUSE_LASTPRIVATE
913 OMP_CLAUSE_PRIVATE_DEBUG in
916 OMP_CLAUSE_LINEAR_NO_COPYIN in
919 OMP_CLAUSE_MAP_ZERO_BIAS_ARRAY_SECTION in
922 OMP_CLAUSE_REDUCTION_OMP_ORIG_REF in
925 TRANSACTION_EXPR_RELAXED in
933 CALL_EXPR_RETURN_SLOT_OPT in
939 OMP_PARALLEL_COMBINED in
942 OMP_ATOMIC_SEQ_CST in
945 OMP_CLAUSE_PRIVATE_OUTER_REF in
948 OMP_CLAUSE_LINEAR_NO_COPYOUT in
951 TYPE_REF_IS_RVALUE in
963 CALL_FROM_THUNK_P and
964 CALL_ALLOCA_FOR_VAR_P in
967 OMP_CLAUSE_LINEAR_VARIABLE_STRIDE in
982 TREE_THIS_VOLATILE in
1005 TYPE_SIZES_GIMPLIFIED in
1019 VAR_DECL, FUNCTION_DECL, TYPE_DECL
1020 RECORD_TYPE, UNION_TYPE, QUAL_UNION_TYPE
1023 SSA_NAME_OCCURS_IN_ABNORMAL_PHI in
1043 INDIRECT_REF, MEM_REF, TARGET_MEM_REF, ARRAY_REF, ARRAY_RANGE_REF
1045 SSA_NAME_IN_FREELIST in
1057 IDENTIFIER_TRANSPARENT_ALIAS in
1063 all trees (used liberally by many passes)
1070 VAR_DECL_IS_VIRTUAL_OPERAND in
1084 TYPE_VECTOR_OPAQUE in
1087 SSA_NAME_IS_DEFAULT_DEF in
1090 DECL_NONLOCAL_FRAME in
1094 RECORD_TYPE, UNION_TYPE and QUAL_UNION_TYPE
1097 struct GTY(()) tree_typed
{
1098 struct tree_base base
;
1102 struct GTY(()) tree_common
{
1103 struct tree_typed typed
;
1107 struct GTY(()) tree_int_cst
{
1108 struct tree_typed typed
;
1109 HOST_WIDE_INT val
[1];
1113 struct GTY(()) tree_real_cst
{
1114 struct tree_typed typed
;
1115 struct real_value
* real_cst_ptr
;
1118 struct GTY(()) tree_fixed_cst
{
1119 struct tree_typed typed
;
1120 struct fixed_value
* fixed_cst_ptr
;
1123 struct GTY(()) tree_string
{
1124 struct tree_typed typed
;
1129 struct GTY(()) tree_complex
{
1130 struct tree_typed typed
;
1135 struct GTY(()) tree_vector
{
1136 struct tree_typed typed
;
1137 tree
GTY ((length ("TYPE_VECTOR_SUBPARTS (TREE_TYPE ((tree)&%h))"))) elts
[1];
1140 struct GTY(()) tree_identifier
{
1141 struct tree_common common
;
1142 struct ht_identifier id
;
1145 struct GTY(()) tree_list
{
1146 struct tree_common common
;
1151 struct GTY(()) tree_vec
{
1152 struct tree_common common
;
1153 tree
GTY ((length ("TREE_VEC_LENGTH ((tree)&%h)"))) a
[1];
1156 /* A single element of a CONSTRUCTOR. VALUE holds the actual value of the
1157 element. INDEX can optionally design the position of VALUE: in arrays,
1158 it is the index where VALUE has to be placed; in structures, it is the
1159 FIELD_DECL of the member. */
1160 struct GTY(()) constructor_elt
{
1165 struct GTY(()) tree_constructor
{
1166 struct tree_typed typed
;
1167 vec
<constructor_elt
, va_gc
> *elts
;
1170 enum omp_clause_depend_kind
1172 OMP_CLAUSE_DEPEND_IN
,
1173 OMP_CLAUSE_DEPEND_OUT
,
1174 OMP_CLAUSE_DEPEND_INOUT
,
1175 OMP_CLAUSE_DEPEND_LAST
1178 enum omp_clause_map_kind
1180 OMP_CLAUSE_MAP_ALLOC
,
1182 OMP_CLAUSE_MAP_FROM
,
1183 OMP_CLAUSE_MAP_TOFROM
,
1184 /* The following kind is an internal only map kind, used for pointer based
1185 array sections. OMP_CLAUSE_SIZE for these is not the pointer size,
1186 which is implicitly POINTER_SIZE_UNITS, but the bias. */
1187 OMP_CLAUSE_MAP_POINTER
,
1188 /* Also internal, behaves like OMP_CLAUS_MAP_TO, but additionally any
1189 OMP_CLAUSE_MAP_POINTER records consecutive after it which have addresses
1190 falling into that range will not be ignored if OMP_CLAUSE_MAP_TO_PSET
1191 wasn't mapped already. */
1192 OMP_CLAUSE_MAP_TO_PSET
,
1196 enum omp_clause_proc_bind_kind
1198 /* Numbers should match omp_proc_bind_t enum in omp.h. */
1199 OMP_CLAUSE_PROC_BIND_FALSE
= 0,
1200 OMP_CLAUSE_PROC_BIND_TRUE
= 1,
1201 OMP_CLAUSE_PROC_BIND_MASTER
= 2,
1202 OMP_CLAUSE_PROC_BIND_CLOSE
= 3,
1203 OMP_CLAUSE_PROC_BIND_SPREAD
= 4,
1204 OMP_CLAUSE_PROC_BIND_LAST
1207 struct GTY(()) tree_exp
{
1208 struct tree_typed typed
;
1210 tree
GTY ((special ("tree_exp"),
1211 desc ("TREE_CODE ((tree) &%0)")))
1215 /* Immediate use linking structure. This structure is used for maintaining
1216 a doubly linked list of uses of an SSA_NAME. */
1217 struct GTY(()) ssa_use_operand_t
{
1218 struct ssa_use_operand_t
* GTY((skip(""))) prev
;
1219 struct ssa_use_operand_t
* GTY((skip(""))) next
;
1220 /* Immediate uses for a given SSA name are maintained as a cyclic
1221 list. To recognize the root of this list, the location field
1222 needs to point to the original SSA name. Since statements and
1223 SSA names are of different data types, we need this union. See
1224 the explanation in struct imm_use_iterator. */
1225 union { gimple stmt
; tree ssa_name
; } GTY((skip(""))) loc
;
1226 tree
*GTY((skip(""))) use
;
1229 struct GTY(()) tree_ssa_name
{
1230 struct tree_typed typed
;
1232 /* _DECL wrapped by this SSA name. */
1235 /* Statement that defines this SSA name. */
1238 /* Value range information. */
1239 union ssa_name_info_type
{
1240 /* Pointer attributes used for alias analysis. */
1241 struct GTY ((tag ("0"))) ptr_info_def
*ptr_info
;
1242 /* Value range attributes used for zero/sign extension elimination. */
1243 struct GTY ((tag ("1"))) range_info_def
*range_info
;
1244 } GTY ((desc ("%1.typed.type ?" \
1245 "!POINTER_TYPE_P (TREE_TYPE ((tree)&%1)) : 2"))) info
;
1247 /* Immediate uses list for this SSA_NAME. */
1248 struct ssa_use_operand_t imm_uses
;
1251 struct GTY(()) phi_arg_d
{
1252 /* imm_use MUST be the first element in struct because we do some
1253 pointer arithmetic with it. See phi_arg_index_from_use. */
1254 struct ssa_use_operand_t imm_use
;
1259 struct GTY(()) tree_omp_clause
{
1260 struct tree_common common
;
1262 enum omp_clause_code code
;
1263 union omp_clause_subcode
{
1264 enum omp_clause_default_kind default_kind
;
1265 enum omp_clause_schedule_kind schedule_kind
;
1266 enum omp_clause_depend_kind depend_kind
;
1267 enum omp_clause_map_kind map_kind
;
1268 enum omp_clause_proc_bind_kind proc_bind_kind
;
1269 enum tree_code reduction_code
;
1270 } GTY ((skip
)) subcode
;
1272 /* The gimplification of OMP_CLAUSE_REDUCTION_{INIT,MERGE} for omp-low's
1274 gimple_seq gimple_reduction_init
;
1275 gimple_seq gimple_reduction_merge
;
1277 tree
GTY ((length ("omp_clause_num_ops[OMP_CLAUSE_CODE ((tree)&%h)]")))
1281 struct GTY(()) tree_block
{
1282 struct tree_base base
;
1285 unsigned abstract_flag
: 1;
1286 unsigned block_num
: 31;
1289 location_t end_locus
;
1292 vec
<tree
, va_gc
> *nonlocalized_vars
;
1296 tree abstract_origin
;
1297 tree fragment_origin
;
1298 tree fragment_chain
;
1301 struct GTY(()) tree_type_common
{
1302 struct tree_common common
;
1308 unsigned int precision
: 10;
1309 unsigned no_force_blk_flag
: 1;
1310 unsigned needs_constructing_flag
: 1;
1311 unsigned transparent_aggr_flag
: 1;
1312 unsigned restrict_flag
: 1;
1313 unsigned contains_placeholder_bits
: 2;
1315 ENUM_BITFIELD(machine_mode
) mode
: 8;
1317 unsigned string_flag
: 1;
1318 unsigned lang_flag_0
: 1;
1319 unsigned lang_flag_1
: 1;
1320 unsigned lang_flag_2
: 1;
1321 unsigned lang_flag_3
: 1;
1322 unsigned lang_flag_4
: 1;
1323 unsigned lang_flag_5
: 1;
1324 unsigned lang_flag_6
: 1;
1327 alias_set_type alias_set
;
1330 union tree_type_symtab
{
1331 int GTY ((tag ("TYPE_SYMTAB_IS_ADDRESS"))) address
;
1332 const char * GTY ((tag ("TYPE_SYMTAB_IS_POINTER"))) pointer
;
1333 struct die_struct
* GTY ((tag ("TYPE_SYMTAB_IS_DIE"))) die
;
1334 } GTY ((desc ("debug_hooks->tree_type_symtab_field"))) symtab
;
1342 struct GTY(()) tree_type_with_lang_specific
{
1343 struct tree_type_common common
;
1344 /* Points to a structure whose details depend on the language in use. */
1345 struct lang_type
*lang_specific
;
1348 struct GTY(()) tree_type_non_common
{
1349 struct tree_type_with_lang_specific with_lang_specific
;
1356 struct GTY (()) tree_binfo
{
1357 struct tree_common common
;
1363 vec
<tree
, va_gc
> *base_accesses
;
1369 vec
<tree
, va_gc
> base_binfos
;
1372 struct GTY(()) tree_decl_minimal
{
1373 struct tree_common common
;
1380 struct GTY(()) tree_decl_common
{
1381 struct tree_decl_minimal common
;
1384 ENUM_BITFIELD(machine_mode
) mode
: 8;
1386 unsigned nonlocal_flag
: 1;
1387 unsigned virtual_flag
: 1;
1388 unsigned ignored_flag
: 1;
1389 unsigned abstract_flag
: 1;
1390 unsigned artificial_flag
: 1;
1391 unsigned preserve_flag
: 1;
1392 unsigned debug_expr_is_from
: 1;
1394 unsigned lang_flag_0
: 1;
1395 unsigned lang_flag_1
: 1;
1396 unsigned lang_flag_2
: 1;
1397 unsigned lang_flag_3
: 1;
1398 unsigned lang_flag_4
: 1;
1399 unsigned lang_flag_5
: 1;
1400 unsigned lang_flag_6
: 1;
1401 unsigned lang_flag_7
: 1;
1402 unsigned lang_flag_8
: 1;
1404 /* In VAR_DECL and PARM_DECL, this is DECL_REGISTER. */
1405 unsigned decl_flag_0
: 1;
1406 /* In FIELD_DECL, this is DECL_BIT_FIELD
1407 In VAR_DECL and FUNCTION_DECL, this is DECL_EXTERNAL.
1408 In TYPE_DECL, this is TYPE_DECL_SUPPRESS_DEBUG. */
1409 unsigned decl_flag_1
: 1;
1410 /* In FIELD_DECL, this is DECL_NONADDRESSABLE_P
1411 In VAR_DECL, PARM_DECL and RESULT_DECL, this is
1412 DECL_HAS_VALUE_EXPR_P. */
1413 unsigned decl_flag_2
: 1;
1415 unsigned decl_flag_3
: 1;
1416 /* Logically, these two would go in a theoretical base shared by var and
1418 unsigned gimple_reg_flag
: 1;
1419 /* In VAR_DECL, PARM_DECL and RESULT_DECL, this is DECL_BY_REFERENCE. */
1420 unsigned decl_by_reference_flag
: 1;
1421 /* In a VAR_DECL and PARM_DECL, this is DECL_READ_P. */
1422 unsigned decl_read_flag
: 1;
1423 /* In a VAR_DECL or RESULT_DECL, this is DECL_NONSHAREABLE. */
1424 unsigned decl_nonshareable_flag
: 1;
1426 /* DECL_OFFSET_ALIGN, used only for FIELD_DECLs. */
1427 unsigned int off_align
: 8;
1429 /* 24 bits unused. */
1431 /* DECL_ALIGN. It should have the same size as TYPE_ALIGN. */
1434 /* UID for points-to sets, stable over copying from inlining. */
1435 unsigned int pt_uid
;
1440 tree abstract_origin
;
1442 /* Points to a structure whose details depend on the language in use. */
1443 struct lang_decl
*lang_specific
;
1446 struct GTY(()) tree_decl_with_rtl
{
1447 struct tree_decl_common common
;
1451 struct GTY(()) tree_field_decl
{
1452 struct tree_decl_common common
;
1455 tree bit_field_type
;
1461 struct GTY(()) tree_label_decl
{
1462 struct tree_decl_with_rtl common
;
1464 int eh_landing_pad_nr
;
1467 struct GTY(()) tree_result_decl
{
1468 struct tree_decl_with_rtl common
;
1471 struct GTY(()) tree_const_decl
{
1472 struct tree_decl_common common
;
1475 struct GTY(()) tree_parm_decl
{
1476 struct tree_decl_with_rtl common
;
1480 struct GTY(()) tree_decl_with_vis
{
1481 struct tree_decl_with_rtl common
;
1482 tree assembler_name
;
1483 struct symtab_node
*symtab_node
;
1485 /* Belong to VAR_DECL exclusively. */
1486 unsigned defer_output
: 1;
1487 unsigned hard_register
: 1;
1488 unsigned common_flag
: 1;
1489 unsigned in_text_section
: 1;
1490 unsigned in_constant_pool
: 1;
1491 unsigned dllimport_flag
: 1;
1492 /* Don't belong to VAR_DECL exclusively. */
1493 unsigned weak_flag
: 1;
1495 unsigned seen_in_bind_expr
: 1;
1496 unsigned comdat_flag
: 1;
1497 /* Used for FUNCTION_DECL, VAR_DECL and in C++ for TYPE_DECL. */
1498 ENUM_BITFIELD(symbol_visibility
) visibility
: 2;
1499 unsigned visibility_specified
: 1;
1501 /* Belong to FUNCTION_DECL exclusively. */
1502 unsigned init_priority_p
: 1;
1503 /* Used by C++ only. Might become a generic decl flag. */
1504 unsigned shadowed_for_var_p
: 1;
1505 /* Belong to FUNCTION_DECL exclusively. */
1506 unsigned cxx_constructor
: 1;
1507 /* Belong to FUNCTION_DECL exclusively. */
1508 unsigned cxx_destructor
: 1;
1509 /* Belong to FUNCTION_DECL exclusively. */
1511 /* Belong to FUNCTION_DECL exclusively. */
1512 unsigned regdecl_flag
: 1;
1513 /* 14 unused bits. */
1516 struct GTY(()) tree_var_decl
{
1517 struct tree_decl_with_vis common
;
1520 struct GTY(()) tree_decl_non_common
{
1521 struct tree_decl_with_vis common
;
1522 /* Almost all FE's use this. */
1526 /* FUNCTION_DECL inherits from DECL_NON_COMMON because of the use of the
1527 arguments/result/saved_tree fields by front ends. It was either inherit
1528 FUNCTION_DECL from non_common, or inherit non_common from FUNCTION_DECL,
1529 which seemed a bit strange. */
1531 struct GTY(()) tree_function_decl
{
1532 struct tree_decl_non_common common
;
1536 /* Arguments of the function. */
1538 /* The personality function. Used for stack unwinding. */
1541 /* Function specific options that are used by this function. */
1542 tree function_specific_target
; /* target options */
1543 tree function_specific_optimization
; /* optimization options */
1545 /* Generic function body. */
1547 /* Index within a virtual table. */
1550 /* In a FUNCTION_DECL for which DECL_BUILT_IN holds, this is
1551 DECL_FUNCTION_CODE. Otherwise unused.
1552 ??? The bitfield needs to be able to hold all target function
1554 ENUM_BITFIELD(built_in_function
) function_code
: 12;
1555 ENUM_BITFIELD(built_in_class
) built_in_class
: 2;
1557 unsigned static_ctor_flag
: 1;
1558 unsigned static_dtor_flag
: 1;
1560 unsigned uninlinable
: 1;
1561 unsigned possibly_inlined
: 1;
1562 unsigned novops_flag
: 1;
1563 unsigned returns_twice_flag
: 1;
1564 unsigned malloc_flag
: 1;
1565 unsigned operator_new_flag
: 1;
1566 unsigned declared_inline_flag
: 1;
1567 unsigned no_inline_warning_flag
: 1;
1569 unsigned no_instrument_function_entry_exit
: 1;
1570 unsigned no_limit_stack
: 1;
1571 unsigned disregard_inline_limits
: 1;
1572 unsigned pure_flag
: 1;
1573 unsigned looping_const_or_pure_flag
: 1;
1574 unsigned has_debug_args_flag
: 1;
1575 unsigned tm_clone_flag
: 1;
1576 unsigned versioned_function
: 1;
1580 struct GTY(()) tree_translation_unit_decl
{
1581 struct tree_decl_common common
;
1582 /* Source language of this translation unit. Used for DWARF output. */
1583 const char * GTY((skip(""))) language
;
1584 /* TODO: Non-optimization used to build this translation unit. */
1585 /* TODO: Root of a partial DWARF tree for global types and decls. */
1588 struct GTY(()) tree_type_decl
{
1589 struct tree_decl_non_common common
;
1593 struct GTY ((chain_next ("%h.next"), chain_prev ("%h.prev"))) tree_statement_list_node
1595 struct tree_statement_list_node
*prev
;
1596 struct tree_statement_list_node
*next
;
1600 struct GTY(()) tree_statement_list
1602 struct tree_typed typed
;
1603 struct tree_statement_list_node
*head
;
1604 struct tree_statement_list_node
*tail
;
1608 /* Optimization options used by a function. */
1610 struct GTY(()) tree_optimization_option
{
1611 struct tree_common common
;
1613 /* The optimization options used by the user. */
1614 struct cl_optimization opts
;
1616 /* Target optabs for this set of optimization options. This is of
1617 type `struct target_optabs *'. */
1618 void *GTY ((atomic
)) optabs
;
1620 /* The value of this_target_optabs against which the optabs above were
1622 struct target_optabs
*GTY ((skip
)) base_optabs
;
1625 /* Forward declaration, defined in target-globals.h. */
1627 struct GTY(()) target_globals
;
1629 /* Target options used by a function. */
1631 struct GTY(()) tree_target_option
{
1632 struct tree_common common
;
1634 /* Target globals for the corresponding target option. */
1635 struct target_globals
*globals
;
1637 /* The optimization options used by the user. */
1638 struct cl_target_option opts
;
1641 /* Define the overall contents of a tree node.
1642 It may be any of the structures declared above
1643 for various types of node. */
1644 union GTY ((ptr_alias (union lang_tree_node
),
1645 desc ("tree_node_structure (&%h)"), variable_size
)) tree_node
{
1646 struct tree_base
GTY ((tag ("TS_BASE"))) base
;
1647 struct tree_typed
GTY ((tag ("TS_TYPED"))) typed
;
1648 struct tree_common
GTY ((tag ("TS_COMMON"))) common
;
1649 struct tree_int_cst
GTY ((tag ("TS_INT_CST"))) int_cst
;
1650 struct tree_real_cst
GTY ((tag ("TS_REAL_CST"))) real_cst
;
1651 struct tree_fixed_cst
GTY ((tag ("TS_FIXED_CST"))) fixed_cst
;
1652 struct tree_vector
GTY ((tag ("TS_VECTOR"))) vector
;
1653 struct tree_string
GTY ((tag ("TS_STRING"))) string
;
1654 struct tree_complex
GTY ((tag ("TS_COMPLEX"))) complex;
1655 struct tree_identifier
GTY ((tag ("TS_IDENTIFIER"))) identifier
;
1656 struct tree_decl_minimal
GTY((tag ("TS_DECL_MINIMAL"))) decl_minimal
;
1657 struct tree_decl_common
GTY ((tag ("TS_DECL_COMMON"))) decl_common
;
1658 struct tree_decl_with_rtl
GTY ((tag ("TS_DECL_WRTL"))) decl_with_rtl
;
1659 struct tree_decl_non_common
GTY ((tag ("TS_DECL_NON_COMMON")))
1661 struct tree_parm_decl
GTY ((tag ("TS_PARM_DECL"))) parm_decl
;
1662 struct tree_decl_with_vis
GTY ((tag ("TS_DECL_WITH_VIS"))) decl_with_vis
;
1663 struct tree_var_decl
GTY ((tag ("TS_VAR_DECL"))) var_decl
;
1664 struct tree_field_decl
GTY ((tag ("TS_FIELD_DECL"))) field_decl
;
1665 struct tree_label_decl
GTY ((tag ("TS_LABEL_DECL"))) label_decl
;
1666 struct tree_result_decl
GTY ((tag ("TS_RESULT_DECL"))) result_decl
;
1667 struct tree_const_decl
GTY ((tag ("TS_CONST_DECL"))) const_decl
;
1668 struct tree_type_decl
GTY ((tag ("TS_TYPE_DECL"))) type_decl
;
1669 struct tree_function_decl
GTY ((tag ("TS_FUNCTION_DECL"))) function_decl
;
1670 struct tree_translation_unit_decl
GTY ((tag ("TS_TRANSLATION_UNIT_DECL")))
1671 translation_unit_decl
;
1672 struct tree_type_common
GTY ((tag ("TS_TYPE_COMMON"))) type_common
;
1673 struct tree_type_with_lang_specific
GTY ((tag ("TS_TYPE_WITH_LANG_SPECIFIC")))
1674 type_with_lang_specific
;
1675 struct tree_type_non_common
GTY ((tag ("TS_TYPE_NON_COMMON")))
1677 struct tree_list
GTY ((tag ("TS_LIST"))) list
;
1678 struct tree_vec
GTY ((tag ("TS_VEC"))) vec
;
1679 struct tree_exp
GTY ((tag ("TS_EXP"))) exp
;
1680 struct tree_ssa_name
GTY ((tag ("TS_SSA_NAME"))) ssa_name
;
1681 struct tree_block
GTY ((tag ("TS_BLOCK"))) block
;
1682 struct tree_binfo
GTY ((tag ("TS_BINFO"))) binfo
;
1683 struct tree_statement_list
GTY ((tag ("TS_STATEMENT_LIST"))) stmt_list
;
1684 struct tree_constructor
GTY ((tag ("TS_CONSTRUCTOR"))) constructor
;
1685 struct tree_omp_clause
GTY ((tag ("TS_OMP_CLAUSE"))) omp_clause
;
1686 struct tree_optimization_option
GTY ((tag ("TS_OPTIMIZATION"))) optimization
;
1687 struct tree_target_option
GTY ((tag ("TS_TARGET_OPTION"))) target_option
;
1690 /* Structure describing an attribute and a function to handle it. */
1691 struct attribute_spec
{
1692 /* The name of the attribute (without any leading or trailing __),
1693 or NULL to mark the end of a table of attributes. */
1695 /* The minimum length of the list of arguments of the attribute. */
1697 /* The maximum length of the list of arguments of the attribute
1698 (-1 for no maximum). */
1700 /* Whether this attribute requires a DECL. If it does, it will be passed
1701 from types of DECLs, function return types and array element types to
1702 the DECLs, function types and array types respectively; but when
1703 applied to a type in any other circumstances, it will be ignored with
1704 a warning. (If greater control is desired for a given attribute,
1705 this should be false, and the flags argument to the handler may be
1706 used to gain greater control in that case.) */
1708 /* Whether this attribute requires a type. If it does, it will be passed
1709 from a DECL to the type of that DECL. */
1711 /* Whether this attribute requires a function (or method) type. If it does,
1712 it will be passed from a function pointer type to the target type,
1713 and from a function return type (which is not itself a function
1714 pointer type) to the function type. */
1715 bool function_type_required
;
1716 /* Function to handle this attribute. NODE points to the node to which
1717 the attribute is to be applied. If a DECL, it should be modified in
1718 place; if a TYPE, a copy should be created. NAME is the name of the
1719 attribute (possibly with leading or trailing __). ARGS is the TREE_LIST
1720 of the arguments (which may be NULL). FLAGS gives further information
1721 about the context of the attribute. Afterwards, the attributes will
1722 be added to the DECL_ATTRIBUTES or TYPE_ATTRIBUTES, as appropriate,
1723 unless *NO_ADD_ATTRS is set to true (which should be done on error,
1724 as well as in any other cases when the attributes should not be added
1725 to the DECL or TYPE). Depending on FLAGS, any attributes to be
1726 applied to another type or DECL later may be returned;
1727 otherwise the return value should be NULL_TREE. This pointer may be
1728 NULL if no special handling is required beyond the checks implied
1729 by the rest of this structure. */
1730 tree (*handler
) (tree
*node
, tree name
, tree args
,
1731 int flags
, bool *no_add_attrs
);
1732 /* Specifies if attribute affects type's identity. */
1733 bool affects_type_identity
;
1736 /* These functions allow a front-end to perform a manual layout of a
1737 RECORD_TYPE. (For instance, if the placement of subsequent fields
1738 depends on the placement of fields so far.) Begin by calling
1739 start_record_layout. Then, call place_field for each of the
1740 fields. Then, call finish_record_layout. See layout_type for the
1741 default way in which these functions are used. */
1742 typedef struct record_layout_info_s
{
1743 /* The RECORD_TYPE that we are laying out. */
1745 /* The offset into the record so far, in bytes, not including bits in
1748 /* The last known alignment of SIZE. */
1749 unsigned int offset_align
;
1750 /* The bit position within the last OFFSET_ALIGN bits, in bits. */
1752 /* The alignment of the record so far, in bits. */
1753 unsigned int record_align
;
1754 /* The alignment of the record so far, ignoring #pragma pack and
1755 __attribute__ ((packed)), in bits. */
1756 unsigned int unpacked_align
;
1757 /* The previous field laid out. */
1759 /* The static variables (i.e., class variables, as opposed to
1760 instance variables) encountered in T. */
1761 vec
<tree
, va_gc
> *pending_statics
;
1762 /* Bits remaining in the current alignment group */
1763 int remaining_in_alignment
;
1764 /* True if we've seen a packed field that didn't have normal
1765 alignment anyway. */
1766 int packed_maybe_necessary
;
1767 } *record_layout_info
;
1769 /* Iterator for going through the function arguments. */
1770 struct function_args_iterator
{
1771 tree next
; /* TREE_LIST pointing to the next argument */
1774 /* Structures to map from a tree to another tree. */
1775 struct GTY(()) tree_map_base
{
1779 /* Map from a tree to another tree. */
1781 struct GTY((for_user
)) tree_map
{
1782 struct tree_map_base base
;
1787 /* Map from a decl tree to another tree. */
1788 struct GTY((for_user
)) tree_decl_map
{
1789 struct tree_map_base base
;
1793 /* Map from a tree to an int. */
1794 struct GTY((for_user
)) tree_int_map
{
1795 struct tree_map_base base
;
1799 /* Map from a decl tree to a tree vector. */
1800 struct GTY((for_user
)) tree_vec_map
{
1801 struct tree_map_base base
;
1802 vec
<tree
, va_gc
> *to
;
1805 /* Abstract iterators for CALL_EXPRs. These static inline definitions
1806 have to go towards the end of tree.h so that union tree_node is fully
1807 defined by this point. */
1809 /* Structure containing iterator state. */
1810 struct call_expr_arg_iterator
{
1811 tree t
; /* the call_expr */
1812 int n
; /* argument count */
1813 int i
; /* next argument index */
1816 struct const_call_expr_arg_iterator
{
1817 const_tree t
; /* the call_expr */
1818 int n
; /* argument count */
1819 int i
; /* next argument index */
1822 /* The builtin_info structure holds the FUNCTION_DECL of the standard builtin
1823 function, and a flag that says if the function is available implicitly, or
1824 whether the user has to code explicit calls to __builtin_<xxx>. */
1825 struct GTY(()) builtin_info_type
{
1826 tree decl
[(int)END_BUILTINS
];
1827 bool implicit_p
[(int)END_BUILTINS
];
1831 /*---------------------------------------------------------------------------
1833 ---------------------------------------------------------------------------*/
1834 /* Matrix describing the structures contained in a given tree code. */
1835 extern unsigned char tree_contains_struct
[MAX_TREE_CODES
][64];
1837 /* Class of tree given its code. */
1838 extern const enum tree_code_class tree_code_type
[];
1840 /* Each tree code class has an associated string representation.
1841 These must correspond to the tree_code_class entries. */
1842 extern const char *const tree_code_class_strings
[];
1844 /* Number of argument-words in each kind of tree-node. */
1845 extern const unsigned char tree_code_length
[];
1847 /* Vector of all alias pairs for global symbols. */
1848 extern GTY(()) vec
<alias_pair
, va_gc
> *alias_pairs
;
1850 /* Names of all the built_in classes. */
1851 extern const char *const built_in_class_names
[BUILT_IN_LAST
];
1853 /* Names of all the built_in functions. */
1854 extern const char * built_in_names
[(int) END_BUILTINS
];
1856 /* Number of operands and names for each OMP_CLAUSE node. */
1857 extern unsigned const char omp_clause_num_ops
[];
1858 extern const char * const omp_clause_code_name
[];
1860 /* A vector of all translation-units. */
1861 extern GTY (()) vec
<tree
, va_gc
> *all_translation_units
;
1863 /* Vector of standard trees used by the C compiler. */
1864 extern GTY(()) tree global_trees
[TI_MAX
];
1866 /* The standard C integer types. Use integer_type_kind to index into
1868 extern GTY(()) tree integer_types
[itk_none
];
1870 /* Types used to represent sizes. */
1871 extern GTY(()) tree sizetype_tab
[(int) stk_type_kind_last
];
1873 /* Arrays for keeping track of tree node statistics. */
1874 extern int tree_node_counts
[];
1875 extern int tree_node_sizes
[];
1877 /* True if we are in gimple form and the actions of the folders need to
1878 be restricted. False if we are not in gimple form and folding is not
1879 restricted to creating gimple expressions. */
1880 extern bool in_gimple_form
;
1882 /* Functional interface to the builtin functions. */
1883 extern GTY(()) builtin_info_type builtin_info
;
1885 /* If nonzero, an upper limit on alignment of structure fields, in bits, */
1886 extern unsigned int maximum_field_alignment
;
1888 /* Points to the FUNCTION_DECL of the function whose body we are reading. */
1889 extern GTY(()) tree current_function_decl
;
1891 /* Nonzero means a FUNC_BEGIN label was emitted. */
1892 extern GTY(()) const char * current_function_func_begin_label
;
1894 #endif // GCC_TREE_CORE_H