1 /* Front-end tree definitions for GNU compiler.
2 Copyright (C) 1989, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000
3 Free Software Foundation, Inc.
5 This file is part of GNU CC.
7 GNU CC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU CC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU CC; see the file COPYING. If not, write to
19 the Free Software Foundation, 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
29 /* Codes of tree nodes */
31 #define DEFTREECODE(SYM, STRING, TYPE, NARGS) SYM,
36 LAST_AND_UNUSED_TREE_CODE /* A convenient way to get a value for
42 /* Number of language-independent tree codes. */
43 #define NUM_TREE_CODES ((int) LAST_AND_UNUSED_TREE_CODE)
45 /* Indexed by enum tree_code, contains a character which is
46 `<' for a comparison expression, `1', for a unary arithmetic
47 expression, `2' for a binary arithmetic expression, `e' for
48 other types of expressions, `r' for a reference, `c' for a
49 constant, `d' for a decl, `t' for a type, `s' for a statement,
50 and `x' for anything else (TREE_LIST, IDENTIFIER, etc). */
52 #define MAX_TREE_CODES 256
53 extern char tree_code_type[MAX_TREE_CODES];
54 #define TREE_CODE_CLASS(CODE) tree_code_type[(int) (CODE)]
56 /* Returns non-zero iff CLASS is the tree-code class of an
59 #define IS_EXPR_CODE_CLASS(CLASS) \
60 (CLASS == '<' || CLASS == '1' || CLASS == '2' || CLASS == 'e')
62 /* Number of argument-words in each kind of tree-node. */
64 extern int tree_code_length[MAX_TREE_CODES];
65 #define TREE_CODE_LENGTH(CODE) tree_code_length[(int) (CODE)]
67 /* Names of tree components. */
69 extern const char *tree_code_name[MAX_TREE_CODES];
71 /* Classify which part of the compiler has defined a given builtin function.
72 Note that we assume below that this is no more than two bits. */
81 /* Names for the above. */
82 extern const char *const built_in_class_names[4];
84 /* Codes that identify the various built in functions
85 so that expand_call can identify them quickly. */
87 #define DEF_BUILTIN(x) x,
88 enum built_in_function
90 #include "builtins.def"
92 /* Upper bound on non-language-specific builtins. */
97 /* Names for the above. */
98 extern const char *const built_in_names[(int) END_BUILTINS];
100 /* An array of _DECL trees for the above. */
101 extern union tree_node *built_in_decls[(int) END_BUILTINS];
103 /* The definition of tree nodes fills the next several pages. */
105 /* A tree node can represent a data type, a variable, an expression
106 or a statement. Each node has a TREE_CODE which says what kind of
107 thing it represents. Some common codes are:
108 INTEGER_TYPE -- represents a type of integers.
109 ARRAY_TYPE -- represents a type of pointer.
110 VAR_DECL -- represents a declared variable.
111 INTEGER_CST -- represents a constant integer value.
112 PLUS_EXPR -- represents a sum (an expression).
114 As for the contents of a tree node: there are some fields
115 that all nodes share. Each TREE_CODE has various special-purpose
116 fields as well. The fields of a node are never accessed directly,
117 always through accessor macros. */
119 /* This type is used everywhere to refer to a tree node. */
121 typedef union tree_node *tree;
123 /* Every kind of tree node starts with this structure,
124 so all nodes have these fields.
126 See the accessor macros, defined below, for documentation of the
131 union tree_node *chain;
132 union tree_node *type;
133 ENUM_BITFIELD(tree_code) code : 8;
134 unsigned side_effects_flag : 1;
135 unsigned constant_flag : 1;
136 unsigned addressable_flag : 1;
137 unsigned volatile_flag : 1;
138 unsigned readonly_flag : 1;
139 unsigned unsigned_flag : 1;
140 unsigned asm_written_flag: 1;
142 unsigned used_flag : 1;
143 unsigned nothrow_flag : 1;
144 unsigned static_flag : 1;
145 unsigned public_flag : 1;
146 unsigned private_flag : 1;
147 unsigned protected_flag : 1;
148 unsigned bounded_flag : 1;
150 unsigned lang_flag_0 : 1;
151 unsigned lang_flag_1 : 1;
152 unsigned lang_flag_2 : 1;
153 unsigned lang_flag_3 : 1;
154 unsigned lang_flag_4 : 1;
155 unsigned lang_flag_5 : 1;
156 unsigned lang_flag_6 : 1;
157 /* This flag is presently unused. However, language front-ends
158 should not make use of this flag; it is reserved for future
163 /* The following table lists the uses of each of the above flags and
164 for which types of nodes they are defined. Note that expressions
170 VAR_DECL, FUNCTION_DECL, FIELD_DECL, CONSTRUCTOR, LABEL_DECL,
171 ..._TYPE, IDENTIFIER_NODE
176 VAR_DECL, FUNCTION_DECL, CONSTRUCTOR, ADDR_EXPR
177 TREE_NO_UNUSED_WARNING in
178 CONVERT_EXPR, NOP_EXPR, COMPOUND_EXPR
180 TREE_LIST or TREE_VEC
181 TREE_CONSTANT_OVERFLOW in
182 INTEGER_CST, REAL_CST, COMPLEX_CST
183 TREE_SYMBOL_REFERENCED in
189 INTEGER_CST, REAL_CST, COMPLEX_CST
191 VAR_DECL or FUNCTION_DECL
193 TREE_LIST or TREE_VEC
194 EXPR_WFL_EMIT_LINE_NOTE in
195 EXPR_WITH_FILE_LOCATION
200 TREE_LIST or TREE_VEC
202 ??? unspecified nodes
206 TREE_VIA_PROTECTED in
210 ??? unspecified nodes
219 TREE_THIS_VOLATILE in
239 INTEGER_TYPE, ENUMERAL_TYPE, FIELD_DECL
240 DECL_BUILT_IN_NONANSI in
244 SAVE_EXPR_NOPLACEHOLDER in
250 VAR_DECL, FUNCTION_DECL, RECORD_TYPE, UNION_TYPE, QUAL_UNION_TYPE
256 expressions, IDENTIFIER_NODE
261 CALL_EXPR, FUNCTION_DECL
266 expressions, VAR_DECL, PARM_DECL, FIELD_DECL, FUNCTION_DECL
271 /* Define accessors for the fields that all tree nodes have
272 (though some fields are not used for all kinds of nodes). */
274 /* The tree-code says what kind of node it is.
275 Codes are defined in tree.def. */
276 #define TREE_CODE(NODE) ((enum tree_code) (NODE)->common.code)
277 #define TREE_SET_CODE(NODE, VALUE) ((NODE)->common.code = (int) (VALUE))
279 /* When checking is enabled, errors will be generated if a tree node
280 is accessed incorrectly. The macros abort with a fatal error. */
281 #if defined ENABLE_TREE_CHECKING && (GCC_VERSION >= 2007)
283 #define TREE_CHECK(t, code) __extension__ \
284 ({ const tree __t = t; \
285 if (TREE_CODE(__t) != (code)) \
286 tree_check_failed (__t, code, __FILE__, __LINE__, __FUNCTION__); \
288 #define TREE_CLASS_CHECK(t, class) __extension__ \
289 ({ const tree __t = t; \
290 if (TREE_CODE_CLASS(TREE_CODE(__t)) != (class)) \
291 tree_class_check_failed (__t, class, __FILE__, __LINE__, __FUNCTION__); \
294 /* These checks have to be special cased. */
295 #define CST_OR_CONSTRUCTOR_CHECK(t) __extension__ \
296 ({ const tree __t = t; \
297 enum tree_code __c = TREE_CODE(__t); \
298 if (__c != CONSTRUCTOR && TREE_CODE_CLASS(__c) != 'c') \
299 tree_check_failed (__t, CONSTRUCTOR, __FILE__, __LINE__, __FUNCTION__); \
301 #define EXPR_CHECK(t) __extension__ \
302 ({ const tree __t = t; \
303 char __c = TREE_CODE_CLASS(TREE_CODE(__t)); \
304 if (__c != 'r' && __c != 's' && __c != '<' \
305 && __c != '1' && __c != '2' && __c != 'e') \
306 tree_class_check_failed(__t, 'e', __FILE__, __LINE__, __FUNCTION__); \
309 extern void tree_check_failed PARAMS ((const tree, enum tree_code,
310 const char *, int, const char *))
312 extern void tree_class_check_failed PARAMS ((const tree, int,
313 const char *, int, const char *))
316 #else /* not ENABLE_TREE_CHECKING, or not gcc */
318 #define TREE_CHECK(t, code) (t)
319 #define TREE_CLASS_CHECK(t, code) (t)
320 #define CST_OR_CONSTRUCTOR_CHECK(t) (t)
321 #define EXPR_CHECK(t) (t)
325 #include "tree-check.h"
327 #define TYPE_CHECK(tree) TREE_CLASS_CHECK (tree, 't')
328 #define DECL_CHECK(tree) TREE_CLASS_CHECK (tree, 'd')
329 #define CST_CHECK(tree) TREE_CLASS_CHECK (tree, 'c')
331 /* In all nodes that are expressions, this is the data type of the expression.
332 In POINTER_TYPE nodes, this is the type that the pointer points to.
333 In ARRAY_TYPE nodes, this is the type of the elements.
334 In VECTOR_TYPE nodes, this is the type of the elements. */
335 #define TREE_TYPE(NODE) ((NODE)->common.type)
337 /* Nodes are chained together for many purposes.
338 Types are chained together to record them for being output to the debugger
339 (see the function `chain_type').
340 Decls in the same scope are chained together to record the contents
342 Statement nodes for successive statements used to be chained together.
343 Often lists of things are represented by TREE_LIST nodes that
344 are chained together. */
346 #define TREE_CHAIN(NODE) ((NODE)->common.chain)
348 /* Given an expression as a tree, strip any NON_LVALUE_EXPRs and NOP_EXPRs
349 that don't change the machine mode. */
351 #define STRIP_NOPS(EXP) \
352 while ((TREE_CODE (EXP) == NOP_EXPR \
353 || TREE_CODE (EXP) == CONVERT_EXPR \
354 || TREE_CODE (EXP) == NON_LVALUE_EXPR) \
355 && TREE_OPERAND (EXP, 0) != error_mark_node \
356 && (TYPE_MODE (TREE_TYPE (EXP)) \
357 == TYPE_MODE (TREE_TYPE (TREE_OPERAND (EXP, 0))))) \
358 (EXP) = TREE_OPERAND (EXP, 0);
360 /* Like STRIP_NOPS, but don't let the signedness change either. */
362 #define STRIP_SIGN_NOPS(EXP) \
363 while ((TREE_CODE (EXP) == NOP_EXPR \
364 || TREE_CODE (EXP) == CONVERT_EXPR \
365 || TREE_CODE (EXP) == NON_LVALUE_EXPR) \
366 && TREE_OPERAND (EXP, 0) != error_mark_node \
367 && (TYPE_MODE (TREE_TYPE (EXP)) \
368 == TYPE_MODE (TREE_TYPE (TREE_OPERAND (EXP, 0)))) \
369 && (TREE_UNSIGNED (TREE_TYPE (EXP)) \
370 == TREE_UNSIGNED (TREE_TYPE (TREE_OPERAND (EXP, 0))))) \
371 (EXP) = TREE_OPERAND (EXP, 0);
373 /* Like STRIP_NOPS, but don't alter the TREE_TYPE either. */
375 #define STRIP_TYPE_NOPS(EXP) \
376 while ((TREE_CODE (EXP) == NOP_EXPR \
377 || TREE_CODE (EXP) == CONVERT_EXPR \
378 || TREE_CODE (EXP) == NON_LVALUE_EXPR) \
379 && TREE_OPERAND (EXP, 0) != error_mark_node \
380 && (TREE_TYPE (EXP) \
381 == TREE_TYPE (TREE_OPERAND (EXP, 0)))) \
382 (EXP) = TREE_OPERAND (EXP, 0);
384 /* Nonzero if TYPE represents an integral type. Note that we do not
385 include COMPLEX types here. */
387 #define INTEGRAL_TYPE_P(TYPE) \
388 (TREE_CODE (TYPE) == INTEGER_TYPE || TREE_CODE (TYPE) == ENUMERAL_TYPE \
389 || TREE_CODE (TYPE) == BOOLEAN_TYPE || TREE_CODE (TYPE) == CHAR_TYPE)
391 /* Nonzero if TYPE represents a floating-point type, including complex
392 floating-point types. */
394 #define FLOAT_TYPE_P(TYPE) \
395 (TREE_CODE (TYPE) == REAL_TYPE \
396 || (TREE_CODE (TYPE) == COMPLEX_TYPE \
397 && TREE_CODE (TREE_TYPE (TYPE)) == REAL_TYPE))
399 /* Nonzero if TYPE represents an aggregate (multi-component) type. */
401 #define AGGREGATE_TYPE_P(TYPE) \
402 (TREE_CODE (TYPE) == ARRAY_TYPE || TREE_CODE (TYPE) == RECORD_TYPE \
403 || TREE_CODE (TYPE) == UNION_TYPE || TREE_CODE (TYPE) == QUAL_UNION_TYPE \
404 || TREE_CODE (TYPE) == SET_TYPE)
406 /* Nonzero if TYPE represents an unbounded pointer or unbounded
407 reference type. (It should be renamed to INDIRECT_TYPE_P.) */
409 #define POINTER_TYPE_P(TYPE) \
410 (TREE_CODE (TYPE) == POINTER_TYPE || TREE_CODE (TYPE) == REFERENCE_TYPE)
412 /* Nonzero if TYPE represents a bounded pointer or bounded reference type. */
414 #define BOUNDED_INDIRECT_TYPE_P(TYPE) \
415 (TREE_CODE (TYPE) == RECORD_TYPE && TREE_TYPE (TYPE))
417 /* Nonzero if TYPE represents a bounded pointer type. */
419 #define BOUNDED_POINTER_TYPE_P(TYPE) \
420 (BOUNDED_INDIRECT_TYPE_P (TYPE) \
421 && TREE_CODE (TYPE_BOUNDED_SUBTYPE (TYPE)) == POINTER_TYPE)
423 /* Nonzero if TYPE represents a bounded reference type. Bounded
424 reference types have two specific uses: (1) When a reference is
425 seated to a variable-length RECORD_TYPE that has an array of
426 indeterminate length as its final field. For all other objects, it
427 is sufficient to check bounds at the time the reference is seated,
428 and assume that all future uses of the reference are safe, since
429 the address of references cannot change. (2) When a reference
430 supertype is seated to an subtype object. The bounds "remember"
431 the true size of the complete object, so that subsequent upcasts of
432 the address of the reference will be checked properly (is such a
433 thing valid C++?). */
435 #define BOUNDED_REFERENCE_TYPE_P(TYPE) \
436 (BOUNDED_INDIRECT_TYPE_P (TYPE) \
437 && TREE_CODE (TYPE_BOUNDED_SUBTYPE (TYPE)) == REFERENCE_TYPE)
439 /* Nonzero if TYPE represents a pointer or reference type, either
440 bounded or unbounded. */
442 #define MAYBE_BOUNDED_INDIRECT_TYPE_P(TYPE) \
443 (POINTER_TYPE_P (TYPE) || BOUNDED_INDIRECT_TYPE_P (TYPE))
445 /* Nonzero if TYPE represents a pointer type, either bounded or unbounded. */
447 #define MAYBE_BOUNDED_POINTER_TYPE_P(TYPE) \
448 (TREE_CODE (TYPE) == POINTER_TYPE || BOUNDED_POINTER_TYPE_P (TYPE))
450 /* Nonzero if TYPE represents a reference type, either bounded or unbounded. */
452 #define MAYBE_BOUNDED_REFERENCE_TYPE_P(TYPE) \
453 (TREE_CODE (TYPE) == REFERENCE_TYPE || BOUNDED_REFERENCE_TYPE_P (TYPE))
455 /* Nonzero if this type is a complete type. */
456 #define COMPLETE_TYPE_P(NODE) (TYPE_SIZE (NODE) != NULL_TREE)
458 /* Nonzero if this type is the (possibly qualified) void type. */
459 #define VOID_TYPE_P(NODE) (TREE_CODE (NODE) == VOID_TYPE)
461 /* Nonzero if this type is complete or is cv void. */
462 #define COMPLETE_OR_VOID_TYPE_P(NODE) \
463 (COMPLETE_TYPE_P (NODE) || VOID_TYPE_P (NODE))
465 /* Nonzero if this type is complete or is an array with unspecified bound. */
466 #define COMPLETE_OR_UNBOUND_ARRAY_TYPE_P(NODE) \
467 (COMPLETE_TYPE_P (TREE_CODE (NODE) == ARRAY_TYPE ? TREE_TYPE (NODE) : NODE))
469 /* Nonzero if TYPE represents a type. */
471 #define TYPE_P(TYPE) (TREE_CODE_CLASS (TREE_CODE (TYPE)) == 't')
473 /* Define many boolean fields that all tree nodes have. */
475 /* In VAR_DECL nodes, nonzero means address of this is needed.
476 So it cannot be in a register.
477 In a FUNCTION_DECL, nonzero means its address is needed.
478 So it must be compiled even if it is an inline function.
479 In a FIELD_DECL node, it means that the programmer is permitted to
480 construct the address of this field. This is used for aliasing
481 purposes: see record_component_aliases.
482 In CONSTRUCTOR nodes, it means object constructed must be in memory.
483 In LABEL_DECL nodes, it means a goto for this label has been seen
484 from a place outside all binding contours that restore stack levels.
485 In ..._TYPE nodes, it means that objects of this type must
486 be fully addressable. This means that pieces of this
487 object cannot go into register parameters, for example.
488 In IDENTIFIER_NODEs, this means that some extern decl for this name
489 had its address taken. That matters for inline functions. */
490 #define TREE_ADDRESSABLE(NODE) ((NODE)->common.addressable_flag)
492 /* In a VAR_DECL, nonzero means allocate static storage.
493 In a FUNCTION_DECL, nonzero if function has been defined.
494 In a CONSTRUCTOR, nonzero means allocate static storage. */
495 #define TREE_STATIC(NODE) ((NODE)->common.static_flag)
497 /* In a CONVERT_EXPR, NOP_EXPR or COMPOUND_EXPR, this means the node was
498 made implicitly and should not lead to an "unused value" warning. */
499 #define TREE_NO_UNUSED_WARNING(NODE) ((NODE)->common.static_flag)
501 /* Nonzero for a TREE_LIST or TREE_VEC node means that the derivation
502 chain is via a `virtual' declaration. */
503 #define TREE_VIA_VIRTUAL(NODE) ((NODE)->common.static_flag)
505 /* In an INTEGER_CST, REAL_CST, or COMPLEX_CST, this means there was an
506 overflow in folding. This is distinct from TREE_OVERFLOW because ANSI C
507 requires a diagnostic when overflows occur in constant expressions. */
508 #define TREE_CONSTANT_OVERFLOW(NODE) ((NODE)->common.static_flag)
510 /* In an IDENTIFIER_NODE, this means that assemble_name was called with
511 this string as an argument. */
512 #define TREE_SYMBOL_REFERENCED(NODE) ((NODE)->common.static_flag)
514 /* In an INTEGER_CST, REAL_CST, of COMPLEX_CST, this means there was an
515 overflow in folding, and no warning has been issued for this subexpression.
516 TREE_OVERFLOW implies TREE_CONSTANT_OVERFLOW, but not vice versa. */
517 #define TREE_OVERFLOW(NODE) ((NODE)->common.public_flag)
519 /* In a VAR_DECL or FUNCTION_DECL,
520 nonzero means name is to be accessible from outside this module.
521 In an identifier node, nonzero means an external declaration
522 accessible from outside this module was previously seen
523 for this name in an inner scope. */
524 #define TREE_PUBLIC(NODE) ((NODE)->common.public_flag)
526 /* Nonzero for TREE_LIST or TREE_VEC node means that the path to the
527 base class is via a `public' declaration, which preserves public
528 fields from the base class as public. */
529 #define TREE_VIA_PUBLIC(NODE) ((NODE)->common.public_flag)
531 /* Ditto, for `private' declarations. */
532 #define TREE_VIA_PRIVATE(NODE) ((NODE)->common.private_flag)
534 /* Nonzero for TREE_LIST node means that the path to the
535 base class is via a `protected' declaration, which preserves
536 protected fields from the base class as protected.
538 #define TREE_VIA_PROTECTED(NODE) ((NODE)->common.protected_flag)
540 /* In any expression, nonzero means it has side effects or reevaluation
541 of the whole expression could produce a different value.
542 This is set if any subexpression is a function call, a side effect
543 or a reference to a volatile variable.
544 In a ..._DECL, this is set only if the declaration said `volatile'. */
545 #define TREE_SIDE_EFFECTS(NODE) ((NODE)->common.side_effects_flag)
547 /* Nonzero means this expression is volatile in the C sense:
548 its address should be of type `volatile WHATEVER *'.
549 In other words, the declared item is volatile qualified.
550 This is used in _DECL nodes and _REF nodes.
552 In a ..._TYPE node, means this type is volatile-qualified.
553 But use TYPE_VOLATILE instead of this macro when the node is a type,
554 because eventually we may make that a different bit.
556 If this bit is set in an expression, so is TREE_SIDE_EFFECTS. */
557 #define TREE_THIS_VOLATILE(NODE) ((NODE)->common.volatile_flag)
559 /* In a VAR_DECL, PARM_DECL or FIELD_DECL, or any kind of ..._REF node,
560 nonzero means it may not be the lhs of an assignment.
561 In a ..._TYPE node, means this type is const-qualified
562 (but the macro TYPE_READONLY should be used instead of this macro
563 when the node is a type). */
564 #define TREE_READONLY(NODE) ((NODE)->common.readonly_flag)
566 /* Value of expression is constant.
567 Always appears in all ..._CST nodes.
568 May also appear in an arithmetic expression, an ADDR_EXPR or a CONSTRUCTOR
569 if the value is constant. */
570 #define TREE_CONSTANT(NODE) ((NODE)->common.constant_flag)
572 /* In INTEGER_TYPE or ENUMERAL_TYPE nodes, means an unsigned type.
573 In FIELD_DECL nodes, means an unsigned bit field.
574 The same bit is used in functions as DECL_BUILT_IN_NONANSI. */
575 #define TREE_UNSIGNED(NODE) ((NODE)->common.unsigned_flag)
577 #define TYPE_TRAP_SIGNED(NODE) (flag_trapv && ! TREE_UNSIGNED (NODE))
579 /* Nonzero in a VAR_DECL means assembler code has been written.
580 Nonzero in a FUNCTION_DECL means that the function has been compiled.
581 This is interesting in an inline function, since it might not need
582 to be compiled separately.
583 Nonzero in a RECORD_TYPE, UNION_TYPE, QUAL_UNION_TYPE or ENUMERAL_TYPE
584 if the sdb debugging info for the type has been written.
585 In a BLOCK node, nonzero if reorder_blocks has already seen this block. */
586 #define TREE_ASM_WRITTEN(NODE) ((NODE)->common.asm_written_flag)
588 /* Nonzero in a _DECL if the name is used in its scope.
589 Nonzero in an expr node means inhibit warning if value is unused.
590 In IDENTIFIER_NODEs, this means that some extern decl for this name
592 #define TREE_USED(NODE) ((NODE)->common.used_flag)
594 /* In a FUNCTION_DECL, nonzero means a call to the function cannot throw
595 an exception. In a CALL_EXPR, nonzero means the call cannot throw. */
596 #define TREE_NOTHROW(NODE) ((NODE)->common.nothrow_flag)
598 /* Used in classes in C++. */
599 #define TREE_PRIVATE(NODE) ((NODE)->common.private_flag)
600 /* Used in classes in C++.
601 In a BLOCK node, this is BLOCK_HANDLER_BLOCK. */
602 #define TREE_PROTECTED(NODE) ((NODE)->common.protected_flag)
604 /* In a ..._TYPE node, nonzero means that the type's size and layout,
605 (or the size and layout of its arguments and/or return value in the
606 case of a FUNCTION_TYPE or METHOD_TYPE) was changed by the presence
607 of pointer bounds. Use TYPE_BOUNDED instead of this macro when the
608 node is a type, because eventually we may make that a different
609 bit. TYPE_BOUNDED doesn't mean that this type is a bounded indirect
610 type--use BOUNDED_POINTER_TYPE_P, BOUNDED_REFERENCE_TYPE_P,
611 BOUNDED_INDIRECT_TYPE_P to test for that.
613 In a FUNCTION_DECL, nonzero means that the size and layout of one
614 of its arguments and/or return value was changed by the presence of
615 pointer bounds. This value can differ from the value of
616 TYPE_BOUNDED (TREE_TYPE (fundecl)) if the function was implicitly
617 declared, then later called with pointer args, or was declared with
618 a variable argument list and is later called with pointer values in
619 the variable argument list.
621 In a VAR_DECL, PARM_DECL or FIELD_DECL, TREE_BOUNDED matches the value
622 of the decl's type's BOUNDED_POINTER_TYPE_P.
624 In a CONSTRUCTOR or other expression, nonzero means the value is a
625 bounded pointer. It is insufficient to determine the boundedness
626 of an expression EXP with BOUNDED_POINTER_TYPE_P (TREE_TYPE (EXP)),
627 since we allow pointer to be temporarily cast to integer for
628 rounding up to an alignment boudary in a way that preserves the
631 In an IDENTIFIER_NODE, nonzero means that the name is prefixed with
632 BP_PREFIX (see varasm.c). This occurs for the DECL_ASSEMBLER_NAME
633 of a function that has bounded pointer(s) for its return type and/or
636 #define TREE_BOUNDED(NODE) ((NODE)->common.bounded_flag)
638 /* These flags are available for each language front end to use internally. */
639 #define TREE_LANG_FLAG_0(NODE) ((NODE)->common.lang_flag_0)
640 #define TREE_LANG_FLAG_1(NODE) ((NODE)->common.lang_flag_1)
641 #define TREE_LANG_FLAG_2(NODE) ((NODE)->common.lang_flag_2)
642 #define TREE_LANG_FLAG_3(NODE) ((NODE)->common.lang_flag_3)
643 #define TREE_LANG_FLAG_4(NODE) ((NODE)->common.lang_flag_4)
644 #define TREE_LANG_FLAG_5(NODE) ((NODE)->common.lang_flag_5)
645 #define TREE_LANG_FLAG_6(NODE) ((NODE)->common.lang_flag_6)
647 /* Define additional fields and accessors for nodes representing constants. */
649 /* In an INTEGER_CST node. These two together make a 2-word integer.
650 If the data type is signed, the value is sign-extended to 2 words
651 even though not all of them may really be in use.
652 In an unsigned constant shorter than 2 words, the extra bits are 0. */
653 #define TREE_INT_CST(NODE) (INTEGER_CST_CHECK (NODE)->int_cst.int_cst)
654 #define TREE_INT_CST_LOW(NODE) (TREE_INT_CST (NODE).low)
655 #define TREE_INT_CST_HIGH(NODE) (TREE_INT_CST (NODE).high)
657 #define INT_CST_LT(A, B) \
658 (TREE_INT_CST_HIGH (A) < TREE_INT_CST_HIGH (B) \
659 || (TREE_INT_CST_HIGH (A) == TREE_INT_CST_HIGH (B) \
660 && TREE_INT_CST_LOW (A) < TREE_INT_CST_LOW (B)))
662 #define INT_CST_LT_UNSIGNED(A, B) \
663 (((unsigned HOST_WIDE_INT) TREE_INT_CST_HIGH (A) \
664 < (unsigned HOST_WIDE_INT) TREE_INT_CST_HIGH (B)) \
665 || (((unsigned HOST_WIDE_INT) TREE_INT_CST_HIGH (A) \
666 == (unsigned HOST_WIDE_INT) TREE_INT_CST_HIGH (B)) \
667 && TREE_INT_CST_LOW (A) < TREE_INT_CST_LOW (B)))
671 struct tree_common common;
672 struct rtx_def *rtl; /* acts as link to register transfer language
674 /* A sub-struct is necessary here because the function `const_hash'
675 wants to scan both words as a unit and taking the address of the
676 sub-struct yields the properly inclusive bounded pointer. */
678 unsigned HOST_WIDE_INT low;
683 /* In REAL_CST, STRING_CST, COMPLEX_CST nodes, and CONSTRUCTOR nodes,
684 and generally in all kinds of constants that could
685 be given labels (rather than being immediate). */
687 #define TREE_CST_RTL(NODE) (CST_OR_CONSTRUCTOR_CHECK (NODE)->real_cst.rtl)
689 /* In a REAL_CST node. */
690 /* We can represent a real value as either a `double' or a string.
691 Strings don't allow for any optimization, but they do allow
692 for cross-compilation. */
694 #define TREE_REAL_CST(NODE) (REAL_CST_CHECK (NODE)->real_cst.real_cst)
700 struct tree_common common;
701 struct rtx_def *rtl; /* acts as link to register transfer language
703 REAL_VALUE_TYPE real_cst;
706 /* In a STRING_CST */
707 #define TREE_STRING_LENGTH(NODE) (STRING_CST_CHECK (NODE)->string.length)
708 #define TREE_STRING_POINTER(NODE) (STRING_CST_CHECK (NODE)->string.pointer)
712 struct tree_common common;
713 struct rtx_def *rtl; /* acts as link to register transfer language
719 /* In a COMPLEX_CST node. */
720 #define TREE_REALPART(NODE) (COMPLEX_CST_CHECK (NODE)->complex.real)
721 #define TREE_IMAGPART(NODE) (COMPLEX_CST_CHECK (NODE)->complex.imag)
725 struct tree_common common;
726 struct rtx_def *rtl; /* acts as link to register transfer language
728 union tree_node *real;
729 union tree_node *imag;
732 /* Define fields and accessors for some special-purpose tree nodes. */
734 #define IDENTIFIER_LENGTH(NODE) (IDENTIFIER_NODE_CHECK (NODE)->identifier.length)
735 #define IDENTIFIER_POINTER(NODE) (IDENTIFIER_NODE_CHECK (NODE)->identifier.pointer)
737 struct tree_identifier
739 struct tree_common common;
744 /* In a TREE_LIST node. */
745 #define TREE_PURPOSE(NODE) (TREE_LIST_CHECK (NODE)->list.purpose)
746 #define TREE_VALUE(NODE) (TREE_LIST_CHECK (NODE)->list.value)
750 struct tree_common common;
751 union tree_node *purpose;
752 union tree_node *value;
755 /* In a TREE_VEC node. */
756 #define TREE_VEC_LENGTH(NODE) (TREE_VEC_CHECK (NODE)->vec.length)
757 #define TREE_VEC_ELT(NODE,I) (TREE_VEC_CHECK (NODE)->vec.a[I])
758 #define TREE_VEC_END(NODE) ((void) TREE_VEC_CHECK (NODE),&((NODE)->vec.a[(NODE)->vec.length]))
762 struct tree_common common;
764 union tree_node *a[1];
767 /* Define fields and accessors for some nodes that represent expressions. */
769 /* In a SAVE_EXPR node. */
770 #define SAVE_EXPR_CONTEXT(NODE) TREE_OPERAND(NODE, 1)
771 #define SAVE_EXPR_RTL(NODE) (*(struct rtx_def **) &EXPR_CHECK (NODE)->exp.operands[2])
772 #define SAVE_EXPR_NOPLACEHOLDER(NODE) TREE_UNSIGNED (NODE)
773 /* Nonzero if the SAVE_EXPRs value should be kept, even if it occurs
774 both in normal code and in a handler. (Normally, in a handler, all
775 SAVE_EXPRs are unsaved, meaning that there values are
777 #define SAVE_EXPR_PERSISTENT_P(NODE) TREE_ASM_WRITTEN (NODE)
779 /* In a RTL_EXPR node. */
780 #define RTL_EXPR_SEQUENCE(NODE) (*(struct rtx_def **) &EXPR_CHECK (NODE)->exp.operands[0])
781 #define RTL_EXPR_RTL(NODE) (*(struct rtx_def **) &EXPR_CHECK (NODE)->exp.operands[1])
783 /* In a CONSTRUCTOR node. */
784 #define CONSTRUCTOR_ELTS(NODE) TREE_OPERAND (NODE, 1)
786 /* In ordinary expression nodes. */
787 #define TREE_OPERAND(NODE, I) (EXPR_CHECK (NODE)->exp.operands[I])
788 #define TREE_COMPLEXITY(NODE) (EXPR_CHECK (NODE)->exp.complexity)
790 /* In a LABELED_BLOCK_EXPR node. */
791 #define LABELED_BLOCK_LABEL(NODE) TREE_OPERAND (NODE, 0)
792 #define LABELED_BLOCK_BODY(NODE) TREE_OPERAND (NODE, 1)
794 /* In a EXIT_BLOCK_EXPR node. */
795 #define EXIT_BLOCK_LABELED_BLOCK(NODE) TREE_OPERAND (NODE, 0)
796 #define EXIT_BLOCK_RETURN(NODE) TREE_OPERAND (NODE, 1)
798 /* In a LOOP_EXPR node. */
799 #define LOOP_EXPR_BODY(NODE) TREE_OPERAND (NODE, 0)
801 /* In a EXPR_WITH_FILE_LOCATION node. */
802 #define EXPR_WFL_NODE(NODE) TREE_OPERAND((NODE), 0)
803 #define EXPR_WFL_FILENAME(NODE) \
804 (IDENTIFIER_POINTER (EXPR_WFL_FILENAME_NODE ((NODE))))
805 #define EXPR_WFL_FILENAME_NODE(NODE) TREE_OPERAND((NODE), 1)
806 #define EXPR_WFL_LINENO(NODE) (EXPR_CHECK (NODE)->exp.complexity >> 12)
807 #define EXPR_WFL_COLNO(NODE) (EXPR_CHECK (NODE)->exp.complexity & 0xfff)
808 #define EXPR_WFL_LINECOL(NODE) (EXPR_CHECK (NODE)->exp.complexity)
809 #define EXPR_WFL_SET_LINECOL(NODE, LINE, COL) \
810 (EXPR_WFL_LINECOL(NODE) = ((LINE) << 12) | ((COL) & 0xfff))
811 #define EXPR_WFL_EMIT_LINE_NOTE(NODE) ((NODE)->common.public_flag)
815 struct tree_common common;
817 union tree_node *operands[1];
820 /* In a BLOCK node. */
821 #define BLOCK_VARS(NODE) (BLOCK_CHECK (NODE)->block.vars)
822 #define BLOCK_SUBBLOCKS(NODE) (BLOCK_CHECK (NODE)->block.subblocks)
823 #define BLOCK_SUPERCONTEXT(NODE) (BLOCK_CHECK (NODE)->block.supercontext)
824 /* Note: when changing this, make sure to find the places
825 that use chainon or nreverse. */
826 #define BLOCK_CHAIN(NODE) TREE_CHAIN (NODE)
827 #define BLOCK_ABSTRACT_ORIGIN(NODE) (BLOCK_CHECK (NODE)->block.abstract_origin)
828 #define BLOCK_ABSTRACT(NODE) (BLOCK_CHECK (NODE)->block.abstract_flag)
830 /* Nonzero means that this block is prepared to handle exceptions
831 listed in the BLOCK_VARS slot. */
832 #define BLOCK_HANDLER_BLOCK(NODE) (BLOCK_CHECK (NODE)->block.handler_block_flag)
834 /* An index number for this block. These values are not guaranteed to
835 be unique across functions -- whether or not they are depends on
836 the debugging output format in use. */
837 #define BLOCK_NUMBER(NODE) (BLOCK_CHECK (NODE)->block.block_num)
841 struct tree_common common;
843 unsigned handler_block_flag : 1;
844 unsigned abstract_flag : 1;
845 unsigned block_num : 30;
847 union tree_node *vars;
848 union tree_node *subblocks;
849 union tree_node *supercontext;
850 union tree_node *abstract_origin;
853 /* Define fields and accessors for nodes representing data types. */
855 /* See tree.def for documentation of the use of these fields.
856 Look at the documentation of the various ..._TYPE tree codes. */
858 #define TYPE_UID(NODE) (TYPE_CHECK (NODE)->type.uid)
859 #define TYPE_SIZE(NODE) (TYPE_CHECK (NODE)->type.size)
860 #define TYPE_SIZE_UNIT(NODE) (TYPE_CHECK (NODE)->type.size_unit)
861 #define TYPE_MODE(NODE) (TYPE_CHECK (NODE)->type.mode)
862 #define TYPE_VALUES(NODE) (TYPE_CHECK (NODE)->type.values)
863 #define TYPE_DOMAIN(NODE) (TYPE_CHECK (NODE)->type.values)
864 #define TYPE_FIELDS(NODE) (TYPE_CHECK (NODE)->type.values)
865 #define TYPE_METHODS(NODE) (TYPE_CHECK (NODE)->type.maxval)
866 #define TYPE_VFIELD(NODE) (TYPE_CHECK (NODE)->type.minval)
867 #define TYPE_ARG_TYPES(NODE) (TYPE_CHECK (NODE)->type.values)
868 #define TYPE_METHOD_BASETYPE(NODE) (TYPE_CHECK (NODE)->type.maxval)
869 #define TYPE_OFFSET_BASETYPE(NODE) (TYPE_CHECK (NODE)->type.maxval)
870 #define TYPE_POINTER_TO(NODE) (TYPE_CHECK (NODE)->type.pointer_to)
871 #define TYPE_REFERENCE_TO(NODE) (TYPE_CHECK (NODE)->type.reference_to)
872 #define TYPE_MIN_VALUE(NODE) (TYPE_CHECK (NODE)->type.minval)
873 #define TYPE_MAX_VALUE(NODE) (TYPE_CHECK (NODE)->type.maxval)
874 #define TYPE_PRECISION(NODE) (TYPE_CHECK (NODE)->type.precision)
875 #define TYPE_SYMTAB_ADDRESS(NODE) (TYPE_CHECK (NODE)->type.symtab.address)
876 #define TYPE_SYMTAB_POINTER(NODE) (TYPE_CHECK (NODE)->type.symtab.pointer)
877 #define TYPE_NAME(NODE) (TYPE_CHECK (NODE)->type.name)
878 #define TYPE_NEXT_VARIANT(NODE) (TYPE_CHECK (NODE)->type.next_variant)
879 #define TYPE_MAIN_VARIANT(NODE) (TYPE_CHECK (NODE)->type.main_variant)
880 #define TYPE_NONCOPIED_PARTS(NODE) (TYPE_CHECK (NODE)->type.noncopied_parts)
881 #define TYPE_CONTEXT(NODE) (TYPE_CHECK (NODE)->type.context)
882 #define TYPE_LANG_SPECIFIC(NODE) (TYPE_CHECK (NODE)->type.lang_specific)
884 /* For a VECTOR_TYPE node, this describes a different type which is emitted
885 in the debugging output. We use this to describe a vector as a
886 structure containing an array. */
887 #define TYPE_DEBUG_REPRESENTATION_TYPE(NODE) (TYPE_CHECK (NODE)->type.values)
889 /* Indirect types present difficulties because they may be represented
890 as either POINTER_TYPE/REFERENCE_TYPE nodes (unbounded) or as
891 RECORD_TYPE nodes (bounded). Bounded and unbounded pointers might
892 be logically equivalent, but physically different. Simple
893 comparison of the main variant only tells if the types are
894 logically equivalent. Use this predicate to compare for physical
897 /* Types have the same main variant, and have the same boundedness. */
898 #define TYPE_MAIN_VARIANTS_PHYSICALLY_EQUAL_P(TYPE1, TYPE2) \
899 (TYPE_MAIN_VARIANT (TYPE1) == TYPE_MAIN_VARIANT (TYPE2) \
900 && TREE_CODE (TYPE1) == TREE_CODE (TYPE2))
902 /* Return the type variant that has no qualifiers (i.e., the main variant),
903 except that the boundedness qualifier is preserved. */
904 #define TYPE_MAIN_PHYSICAL_VARIANT(TYPE) \
905 (BOUNDED_POINTER_TYPE_P (TYPE) \
906 ? build_qualified_type (TYPE, TYPE_QUAL_BOUNDED) \
907 : TYPE_MAIN_VARIANT (TYPE))
909 /* For aggregate types, information about this type, as a base type
910 for itself. Used in a language-dependent way for types that are
911 neither a RECORD_TYPE, QUAL_UNION_TYPE, nor a UNION_TYPE. */
912 #define TYPE_BINFO(NODE) (TYPE_CHECK (NODE)->type.binfo)
914 /* The (language-specific) typed-based alias set for this type.
915 Objects whose TYPE_ALIAS_SETs are different cannot alias each
916 other. If the TYPE_ALIAS_SET is -1, no alias set has yet been
917 assigned to this type. If the TYPE_ALIAS_SET is 0, objects of this
918 type can alias objects of any type. */
919 #define TYPE_ALIAS_SET(NODE) (TYPE_CHECK (NODE)->type.alias_set)
921 /* Nonzero iff the typed-based alias set for this type has been
923 #define TYPE_ALIAS_SET_KNOWN_P(NODE) \
924 (TYPE_CHECK (NODE)->type.alias_set != -1)
926 /* A TREE_LIST of IDENTIFIER nodes of the attributes that apply
928 #define TYPE_ATTRIBUTES(NODE) (TYPE_CHECK (NODE)->type.attributes)
930 /* The alignment necessary for objects of this type.
931 The value is an int, measured in bits. */
932 #define TYPE_ALIGN(NODE) (TYPE_CHECK (NODE)->type.align)
934 /* 1 if the alignment for this type was requested by "aligned" attribute,
935 0 if it is the default for this type. */
936 #define TYPE_USER_ALIGN(NODE) (TYPE_CHECK (NODE)->type.user_align)
938 /* The alignment for NODE, in bytes. */
939 #define TYPE_ALIGN_UNIT(NODE) \
940 (TYPE_ALIGN (NODE) / BITS_PER_UNIT)
942 #define TYPE_STUB_DECL(NODE) (TREE_CHAIN (NODE))
944 /* In a RECORD_TYPE, UNION_TYPE or QUAL_UNION_TYPE, it means the type
945 has BLKmode only because it lacks the alignment requirement for
947 #define TYPE_NO_FORCE_BLK(NODE) (TYPE_CHECK (NODE)->type.no_force_blk_flag)
949 /* In an INTEGER_TYPE, it means the type represents a size. We use
950 this both for validity checking and to permit optimizations that
951 are unsafe for other types. Note that the C `size_t' type should
952 *not* have this flag set. The `size_t' type is simply a typedef
953 for an ordinary integer type that happens to be the type of an
954 expression returned by `sizeof'; `size_t' has no special
955 properties. Expressions whose type have TYPE_IS_SIZETYPE set are
956 always actual sizes. */
957 #define TYPE_IS_SIZETYPE(NODE) \
958 (INTEGER_TYPE_CHECK (NODE)->type.no_force_blk_flag)
960 /* In a FUNCTION_TYPE, indicates that the function returns with the stack
961 pointer depressed. */
962 #define TYPE_RETURNS_STACK_DEPRESSED(NODE) \
963 (FUNCTION_TYPE_CHECK (NODE)->type.no_force_blk_flag)
965 /* Nonzero in a type considered volatile as a whole. */
966 #define TYPE_VOLATILE(NODE) ((NODE)->common.volatile_flag)
968 /* Means this type is const-qualified. */
969 #define TYPE_READONLY(NODE) ((NODE)->common.readonly_flag)
971 /* If nonzero, this type is `restrict'-qualified, in the C sense of
973 #define TYPE_RESTRICT(NODE) (TYPE_CHECK (NODE)->type.restrict_flag)
975 /* If nonzero, this type's size and layout, (or the size and layout of
976 its arguments and/or return value in the case of a FUNCTION_TYPE or
977 METHOD_TYPE) was changed by the presence of pointer bounds. */
978 #define TYPE_BOUNDED(NODE) (TYPE_CHECK (NODE)->common.bounded_flag)
980 /* There is a TYPE_QUAL value for each type qualifier. They can be
981 combined by bitwise-or to form the complete set of qualifiers for a
984 #define TYPE_UNQUALIFIED 0x0
985 #define TYPE_QUAL_CONST 0x1
986 #define TYPE_QUAL_VOLATILE 0x2
987 #define TYPE_QUAL_RESTRICT 0x4
988 #define TYPE_QUAL_BOUNDED 0x8
990 /* The set of type qualifiers for this type. */
991 #define TYPE_QUALS(NODE) \
992 ((TYPE_READONLY (NODE) * TYPE_QUAL_CONST) \
993 | (TYPE_VOLATILE (NODE) * TYPE_QUAL_VOLATILE) \
994 | (TYPE_RESTRICT (NODE) * TYPE_QUAL_RESTRICT) \
995 | (BOUNDED_INDIRECT_TYPE_P (NODE) * TYPE_QUAL_BOUNDED))
997 /* The set of qualifiers pertinent to an expression node. */
998 #define TREE_EXPR_QUALS(NODE) \
999 ((TREE_READONLY (NODE) * TYPE_QUAL_CONST) \
1000 | (TREE_THIS_VOLATILE (NODE) * TYPE_QUAL_VOLATILE) \
1001 | (TREE_BOUNDED (NODE) * TYPE_QUAL_BOUNDED))
1003 /* The set of qualifiers pertinent to a FUNCTION_DECL node. */
1004 #define TREE_FUNC_QUALS(NODE) \
1005 ((TREE_READONLY (NODE) * TYPE_QUAL_CONST) \
1006 | (TREE_THIS_VOLATILE (NODE) * TYPE_QUAL_VOLATILE))
1008 /* These flags are available for each language front end to use internally. */
1009 #define TYPE_LANG_FLAG_0(NODE) (TYPE_CHECK (NODE)->type.lang_flag_0)
1010 #define TYPE_LANG_FLAG_1(NODE) (TYPE_CHECK (NODE)->type.lang_flag_1)
1011 #define TYPE_LANG_FLAG_2(NODE) (TYPE_CHECK (NODE)->type.lang_flag_2)
1012 #define TYPE_LANG_FLAG_3(NODE) (TYPE_CHECK (NODE)->type.lang_flag_3)
1013 #define TYPE_LANG_FLAG_4(NODE) (TYPE_CHECK (NODE)->type.lang_flag_4)
1014 #define TYPE_LANG_FLAG_5(NODE) (TYPE_CHECK (NODE)->type.lang_flag_5)
1015 #define TYPE_LANG_FLAG_6(NODE) (TYPE_CHECK (NODE)->type.lang_flag_6)
1017 /* If set in an ARRAY_TYPE, indicates a string type (for languages
1018 that distinguish string from array of char).
1019 If set in a SET_TYPE, indicates a bitstring type. */
1020 #define TYPE_STRING_FLAG(NODE) (TYPE_CHECK (NODE)->type.string_flag)
1022 /* If non-NULL, this is a upper bound of the size (in bytes) of an
1023 object of the given ARRAY_TYPE. This allows temporaries to be allocated. */
1024 #define TYPE_ARRAY_MAX_SIZE(ARRAY_TYPE) TYPE_MAX_VALUE (ARRAY_TYPE)
1026 /* For a VECTOR_TYPE, this is the number of sub-parts of the vector. */
1027 #define TYPE_VECTOR_SUBPARTS(VECTOR_TYPE) (GET_MODE_NUNITS (TYPE_CHECK (VECTOR_TYPE)->type.mode))
1029 /* Indicates that objects of this type must be initialized by calling a
1030 function when they are created. */
1031 #define TYPE_NEEDS_CONSTRUCTING(NODE) \
1032 (TYPE_CHECK (NODE)->type.needs_constructing_flag)
1034 /* Indicates that objects of this type (a UNION_TYPE), should be passed
1035 the same way that the first union alternative would be passed. */
1036 #define TYPE_TRANSPARENT_UNION(NODE) \
1037 (UNION_TYPE_CHECK (NODE)->type.transparent_union_flag)
1039 /* For an ARRAY_TYPE, indicates that it is not permitted to
1040 take the address of a component of the type. */
1041 #define TYPE_NONALIASED_COMPONENT(NODE) \
1042 (ARRAY_TYPE_CHECK (NODE)->type.transparent_union_flag)
1044 /* Indicated that objects of this type should be laid out in as
1045 compact a way as possible. */
1046 #define TYPE_PACKED(NODE) (TYPE_CHECK (NODE)->type.packed_flag)
1048 /* A bounded pointer or bounded reference type (collectively called
1049 indirect types) is represented as a RECORD_TYPE node containing
1050 three pointer fields whose type is the corresponding unbounded
1051 POINTER_TYPE or REFERENCE_TYPE. A RECORD_TYPE node that represents
1052 a bounded indirect type differs from a normal RECORD_TYPE node in
1053 that its TREE_TYPE is non-NULL and has the pointed-to type just as
1054 a POINTER_TYPE or REFERENCE_TYPE node has. The bounded RECORD_TYPE
1055 nodes are stored on the same type variant chain alongside the
1056 variants of the underlaying indirect types nodes. The main variant
1057 of such chains is always the unbounded type. */
1059 /* Access the field decls of a bounded-pointer type. */
1060 #define TYPE_BOUNDED_VALUE(TYPE) TYPE_FIELDS (TYPE)
1061 #define TYPE_BOUNDED_BASE(TYPE) TREE_CHAIN (TYPE_BOUNDED_VALUE (TYPE))
1062 #define TYPE_BOUNDED_EXTENT(TYPE) TREE_CHAIN (TYPE_BOUNDED_BASE (TYPE))
1064 /* Access the simple-pointer subtype of a bounded-pointer type. */
1065 #define TYPE_BOUNDED_SUBTYPE(TYPE) TREE_TYPE (TYPE_BOUNDED_VALUE (TYPE))
1067 /* Find the unbounded counterpart to a type, or return TYPE if it is
1068 already unbounded. */
1069 #define TYPE_UNBOUNDED_VARIANT(TYPE) \
1070 (BOUNDED_POINTER_TYPE_P (TYPE) ? TYPE_BOUNDED_SUBTYPE (TYPE) : (TYPE))
1072 /* This field comprises two bits, for values in the range 0..3:
1074 depth=0 means that type is a scalar, or an aggregate that contains
1075 only depth=0 types, or a function that has only depth=0 types for
1076 its return value and argument types.
1078 depth=1 means that type is a pointer to a depth=0 type, or an
1079 aggregate that contains only depth=0 and depth=1 types, or a
1080 function that has only depth=0 and depth=1 types for its return
1081 value and argument types.
1083 The meanings of depth=2 and depth=3 are obvious by induction.
1084 Varargs functions are depth=3. The type `va_list' is depth=3.
1086 The purpose of measuring pointer depth of a type is to determine
1087 the eligibility of a function for an automatically-generated
1088 bounded-pointer thunk. A depth=0 functions needs no thunk. A
1089 depth=1 function is eligible for an automatic thunk. Functions
1090 with depth 2 or more are too complex to get automatic thunks.
1092 Function decls also have a pointer_depth field, since we also
1093 consider the actual argument types for functions. */
1095 #define TYPE_POINTER_DEPTH(TYPE) (TYPE_CHECK (TYPE)->type.pointer_depth)
1097 /* In a FUNCTION_TYPE node, this bit stores the value of
1098 default_pointer_boundedness at the time TYPE was created. It is
1099 useful for choosing default boundedness of function arguments for
1100 non-prototype function decls and for varargs/stdarg lists. */
1101 #define TYPE_AMBIENT_BOUNDEDNESS(TYPE) \
1102 (FUNCTION_TYPE_CHECK (TYPE)->type.transparent_union_flag)
1104 #define MAX_POINTER_DEPTH 2
1105 #define VA_LIST_POINTER_DEPTH 3
1109 struct tree_common common;
1110 union tree_node *values;
1111 union tree_node *size;
1112 union tree_node *size_unit;
1113 union tree_node *attributes;
1116 unsigned int precision : 9;
1117 ENUM_BITFIELD(machine_mode) mode : 7;
1119 unsigned string_flag : 1;
1120 unsigned no_force_blk_flag : 1;
1121 unsigned needs_constructing_flag : 1;
1122 unsigned transparent_union_flag : 1;
1123 unsigned packed_flag : 1;
1124 unsigned restrict_flag : 1;
1125 unsigned pointer_depth : 2;
1127 unsigned lang_flag_0 : 1;
1128 unsigned lang_flag_1 : 1;
1129 unsigned lang_flag_2 : 1;
1130 unsigned lang_flag_3 : 1;
1131 unsigned lang_flag_4 : 1;
1132 unsigned lang_flag_5 : 1;
1133 unsigned lang_flag_6 : 1;
1134 unsigned user_align : 1;
1137 union tree_node *pointer_to;
1138 union tree_node *reference_to;
1139 union {int address; char *pointer; } symtab;
1140 union tree_node *name;
1141 union tree_node *minval;
1142 union tree_node *maxval;
1143 union tree_node *next_variant;
1144 union tree_node *main_variant;
1145 union tree_node *binfo;
1146 union tree_node *noncopied_parts;
1147 union tree_node *context;
1148 HOST_WIDE_INT alias_set;
1149 /* Points to a structure whose details depend on the language in use. */
1150 struct lang_type *lang_specific;
1153 /* Define accessor macros for information about type inheritance
1156 A "basetype" means a particular usage of a data type for inheritance
1157 in another type. Each such basetype usage has its own "binfo"
1158 object to describe it. The binfo object is a TREE_VEC node.
1160 Inheritance is represented by the binfo nodes allocated for a
1161 given type. For example, given types C and D, such that D is
1162 inherited by C, 3 binfo nodes will be allocated: one for describing
1163 the binfo properties of C, similarly one for D, and one for
1164 describing the binfo properties of D as a base type for C.
1165 Thus, given a pointer to class C, one can get a pointer to the binfo
1166 of D acting as a basetype for C by looking at C's binfo's basetypes. */
1168 /* The actual data type node being inherited in this basetype. */
1169 #define BINFO_TYPE(NODE) TREE_TYPE (NODE)
1171 /* The offset where this basetype appears in its containing type.
1172 BINFO_OFFSET slot holds the offset (in bytes)
1173 from the base of the complete object to the base of the part of the
1174 object that is allocated on behalf of this `type'.
1175 This is always 0 except when there is multiple inheritance. */
1177 #define BINFO_OFFSET(NODE) TREE_VEC_ELT ((NODE), 1)
1178 #define TYPE_BINFO_OFFSET(NODE) BINFO_OFFSET (TYPE_BINFO (NODE))
1179 #define BINFO_OFFSET_ZEROP(NODE) (integer_zerop (BINFO_OFFSET (NODE)))
1181 /* The virtual function table belonging to this basetype. Virtual
1182 function tables provide a mechanism for run-time method dispatching.
1183 The entries of a virtual function table are language-dependent. */
1185 #define BINFO_VTABLE(NODE) TREE_VEC_ELT ((NODE), 2)
1186 #define TYPE_BINFO_VTABLE(NODE) BINFO_VTABLE (TYPE_BINFO (NODE))
1188 /* The virtual functions in the virtual function table. This is
1189 a TREE_LIST that is used as an initial approximation for building
1190 a virtual function table for this basetype. */
1191 #define BINFO_VIRTUALS(NODE) TREE_VEC_ELT ((NODE), 3)
1192 #define TYPE_BINFO_VIRTUALS(NODE) BINFO_VIRTUALS (TYPE_BINFO (NODE))
1194 /* A vector of binfos for the direct basetypes inherited by this
1197 If this basetype describes type D as inherited in C, and if the
1198 basetypes of D are E and F, then this vector contains binfos for
1199 inheritance of E and F by C.
1201 ??? This could probably be done by just allocating the
1202 base types at the end of this TREE_VEC (instead of using
1203 another TREE_VEC). This would simplify the calculation
1204 of how many basetypes a given type had. */
1205 #define BINFO_BASETYPES(NODE) TREE_VEC_ELT ((NODE), 4)
1206 #define TYPE_BINFO_BASETYPES(NODE) TREE_VEC_ELT (TYPE_BINFO (NODE), 4)
1208 /* The number of basetypes for NODE. */
1209 #define BINFO_N_BASETYPES(NODE) \
1210 (BINFO_BASETYPES (NODE) ? TREE_VEC_LENGTH (BINFO_BASETYPES (NODE)) : 0)
1212 /* Accessor macro to get to the Nth basetype of this basetype. */
1213 #define BINFO_BASETYPE(NODE,N) TREE_VEC_ELT (BINFO_BASETYPES (NODE), (N))
1214 #define TYPE_BINFO_BASETYPE(NODE,N) BINFO_TYPE (TREE_VEC_ELT (BINFO_BASETYPES (TYPE_BINFO (NODE)), (N)))
1216 /* For a BINFO record describing a virtual base class, i.e., one where
1217 TREE_VIA_VIRTUAL is set, this field assists in locating the virtual
1218 base. The actual contents are language-dependent. Under the old
1219 ABI, the C++ front-end uses a FIELD_DECL whose contents are a
1220 pointer to the virtual base; under the new ABI this field is
1221 instead a INTEGER_CST giving an offset into the vtable where the
1222 offset to the virtual base can be found. */
1223 #define BINFO_VPTR_FIELD(NODE) TREE_VEC_ELT ((NODE), 5)
1225 /* The size of a base class subobject of this type. Not all frontends
1226 currently allocate the space for these fields. */
1227 #define BINFO_SIZE(NODE) TREE_VEC_ELT ((NODE), 6)
1228 #define BINFO_SIZE_UNIT(NODE) TREE_VEC_ELT ((NODE), 7)
1229 #define TYPE_BINFO_SIZE(NODE) BINFO_SIZE (TYPE_BINFO (NODE))
1230 #define TYPE_BINFO_SIZE_UNIT(NODE) BINFO_SIZE_UNIT (TYPE_BINFO (NODE))
1232 /* Slot used to build a chain that represents a use of inheritance.
1233 For example, if X is derived from Y, and Y is derived from Z,
1234 then this field can be used to link the binfo node for X to
1235 the binfo node for X's Y to represent the use of inheritance
1236 from X to Y. Similarly, this slot of the binfo node for X's Y
1237 can point to the Z from which Y is inherited (in X's inheritance
1238 hierarchy). In this fashion, one can represent and traverse specific
1239 uses of inheritance using the binfo nodes themselves (instead of
1240 consing new space pointing to binfo nodes).
1241 It is up to the language-dependent front-ends to maintain
1242 this information as necessary. */
1243 #define BINFO_INHERITANCE_CHAIN(NODE) TREE_VEC_ELT ((NODE), 0)
1245 /* Define fields and accessors for nodes representing declared names. */
1247 /* Nonzero if DECL represents a decl. */
1248 #define DECL_P(DECL) (TREE_CODE_CLASS (TREE_CODE (DECL)) == 'd')
1249 /* This is the name of the object as written by the user.
1250 It is an IDENTIFIER_NODE. */
1251 #define DECL_NAME(NODE) (DECL_CHECK (NODE)->decl.name)
1252 /* This is the name of the object as the assembler will see it
1253 (but before any translations made by ASM_OUTPUT_LABELREF).
1254 Often this is the same as DECL_NAME.
1255 It is an IDENTIFIER_NODE. */
1256 #define DECL_ASSEMBLER_NAME(NODE) (DECL_CHECK (NODE)->decl.assembler_name)
1257 /* Records the section name in a section attribute. Used to pass
1258 the name from decl_attributes to make_function_rtl and make_decl_rtl. */
1259 #define DECL_SECTION_NAME(NODE) (DECL_CHECK (NODE)->decl.section_name)
1260 /* For FIELD_DECLs, this is the
1261 RECORD_TYPE, UNION_TYPE, or QUAL_UNION_TYPE node that the field is
1262 a member of. For VAR_DECL, PARM_DECL, FUNCTION_DECL, LABEL_DECL,
1263 and CONST_DECL nodes, this points to either the FUNCTION_DECL for the
1264 containing function, the RECORD_TYPE or UNION_TYPE for the containing
1265 type, or NULL_TREE if the given decl has "file scope". */
1266 #define DECL_CONTEXT(NODE) (DECL_CHECK (NODE)->decl.context)
1267 #define DECL_FIELD_CONTEXT(NODE) (FIELD_DECL_CHECK (NODE)->decl.context)
1268 /* In a DECL this is the field where configuration dependent machine
1269 attributes are store */
1270 #define DECL_MACHINE_ATTRIBUTES(NODE) (DECL_CHECK (NODE)->decl.machine_attributes)
1271 /* In a FIELD_DECL, this is the field position, counting in bytes, of the
1272 byte containing the bit closest to the beginning of the structure. */
1273 #define DECL_FIELD_OFFSET(NODE) (FIELD_DECL_CHECK (NODE)->decl.arguments)
1274 /* In a FIELD_DECL, this is the offset, in bits, of the first bit of the
1275 field from DECL_FIELD_OFFSET. */
1276 #define DECL_FIELD_BIT_OFFSET(NODE) (FIELD_DECL_CHECK (NODE)->decl.u2.t)
1277 /* In a FIELD_DECL, this indicates whether the field was a bit-field and
1278 if so, the type that was originally specified for it.
1279 TREE_TYPE may have been modified (in finish_struct). */
1280 #define DECL_BIT_FIELD_TYPE(NODE) (FIELD_DECL_CHECK (NODE)->decl.result)
1281 /* In FUNCTION_DECL, a chain of ..._DECL nodes. */
1282 /* VAR_DECL and PARM_DECL reserve the arguments slot
1283 for language-specific uses. */
1284 #define DECL_ARGUMENTS(NODE) (DECL_CHECK (NODE)->decl.arguments)
1285 /* This field is used to reference anything in decl.result and is meant only
1286 for use by the garbage collector. */
1287 #define DECL_RESULT_FLD(NODE) (DECL_CHECK (NODE)->decl.result)
1288 /* In FUNCTION_DECL, holds the decl for the return value. */
1289 #define DECL_RESULT(NODE) (FUNCTION_DECL_CHECK (NODE)->decl.result)
1290 /* For a TYPE_DECL, holds the "original" type. (TREE_TYPE has the copy.) */
1291 #define DECL_ORIGINAL_TYPE(NODE) (TYPE_DECL_CHECK (NODE)->decl.result)
1292 /* In PARM_DECL, holds the type as written (perhaps a function or array). */
1293 #define DECL_ARG_TYPE_AS_WRITTEN(NODE) (PARM_DECL_CHECK (NODE)->decl.result)
1294 /* For a FUNCTION_DECL, holds the tree of BINDINGs.
1295 For a VAR_DECL, holds the initial value.
1296 For a PARM_DECL, not used--default
1297 values for parameters are encoded in the type of the function,
1298 not in the PARM_DECL slot. */
1299 #define DECL_INITIAL(NODE) (DECL_CHECK (NODE)->decl.initial)
1300 /* For a PARM_DECL, records the data type used to pass the argument,
1301 which may be different from the type seen in the program. */
1302 #define DECL_ARG_TYPE(NODE) (PARM_DECL_CHECK (NODE)->decl.initial)
1303 /* For a FIELD_DECL in a QUAL_UNION_TYPE, records the expression, which
1304 if nonzero, indicates that the field occupies the type. */
1305 #define DECL_QUALIFIER(NODE) (FIELD_DECL_CHECK (NODE)->decl.initial)
1306 /* These two fields describe where in the source code the declaration was. */
1307 #define DECL_SOURCE_FILE(NODE) (DECL_CHECK (NODE)->decl.filename)
1308 #define DECL_SOURCE_LINE(NODE) (DECL_CHECK (NODE)->decl.linenum)
1309 /* Holds the size of the datum, in bits, as a tree expression.
1310 Need not be constant. */
1311 #define DECL_SIZE(NODE) (DECL_CHECK (NODE)->decl.size)
1312 /* Likewise for the size in bytes. */
1313 #define DECL_SIZE_UNIT(NODE) (DECL_CHECK (NODE)->decl.size_unit)
1314 /* Holds the alignment required for the datum, in bits. */
1315 #define DECL_ALIGN(NODE) (DECL_CHECK (NODE)->decl.u1.a.align)
1316 /* The alignment of NODE, in bytes. */
1317 #define DECL_ALIGN_UNIT(NODE) (DECL_ALIGN (NODE) / BITS_PER_UNIT)
1318 /* For FIELD_DECLs, off_align holds the number of low-order bits of
1319 DECL_FIELD_OFFSET which are known to be always zero.
1320 DECL_OFFSET_ALIGN thus returns the alignment that DECL_FIELD_OFFSET
1322 #define DECL_OFFSET_ALIGN(NODE) \
1323 (((unsigned HOST_WIDE_INT)1) << FIELD_DECL_CHECK (NODE)->decl.u1.a.off_align)
1324 /* Specify that DECL_ALIGN(NODE) is a multiple of X. */
1325 #define SET_DECL_OFFSET_ALIGN(NODE, X) \
1326 (FIELD_DECL_CHECK (NODE)->decl.u1.a.off_align = exact_log2 ((X) & -(X)))
1327 /* 1 if the alignment for this type was requested by "aligned" attribute,
1328 0 if it is the default for this type. */
1329 #define DECL_USER_ALIGN(NODE) (DECL_CHECK (NODE)->decl.user_align)
1330 /* Holds the machine mode corresponding to the declaration of a variable or
1331 field. Always equal to TYPE_MODE (TREE_TYPE (decl)) except for a
1333 #define DECL_MODE(NODE) (DECL_CHECK (NODE)->decl.mode)
1334 /* Holds the RTL expression for the value of a variable or function. If
1335 PROMOTED_MODE is defined, the mode of this expression may not be same
1336 as DECL_MODE. In that case, DECL_MODE contains the mode corresponding
1337 to the variable's data type, while the mode
1338 of DECL_RTL is the mode actually used to contain the data. */
1339 #define DECL_RTL(NODE) (DECL_CHECK (NODE)->decl.rtl)
1340 /* Holds an INSN_LIST of all of the live ranges in which the variable
1341 has been moved to a possibly different register. */
1342 #define DECL_LIVE_RANGE_RTL(NODE) (DECL_CHECK (NODE)->decl.live_range_rtl)
1343 /* For PARM_DECL, holds an RTL for the stack slot or register
1344 where the data was actually passed. */
1345 #define DECL_INCOMING_RTL(NODE) (PARM_DECL_CHECK (NODE)->decl.u2.r)
1346 /* For FUNCTION_DECL, if it is inline, holds the saved insn chain. */
1347 #define DECL_SAVED_INSNS(NODE) (FUNCTION_DECL_CHECK (NODE)->decl.u2.f)
1348 /* For FUNCTION_DECL, if it is inline,
1349 holds the size of the stack frame, as an integer. */
1350 #define DECL_FRAME_SIZE(NODE) (FUNCTION_DECL_CHECK (NODE)->decl.u1.i)
1351 /* For FUNCTION_DECL, if it is built-in,
1352 this identifies which built-in operation it is. */
1353 #define DECL_FUNCTION_CODE(NODE) (FUNCTION_DECL_CHECK (NODE)->decl.u1.f)
1355 /* The DECL_VINDEX is used for FUNCTION_DECLS in two different ways.
1356 Before the struct containing the FUNCTION_DECL is laid out,
1357 DECL_VINDEX may point to a FUNCTION_DECL in a base class which
1358 is the FUNCTION_DECL which this FUNCTION_DECL will replace as a virtual
1359 function. When the class is laid out, this pointer is changed
1360 to an INTEGER_CST node which is suitable for use as an index
1361 into the virtual function table. */
1362 #define DECL_VINDEX(NODE) (DECL_CHECK (NODE)->decl.vindex)
1363 /* For FIELD_DECLS, DECL_FCONTEXT is the *first* baseclass in
1364 which this FIELD_DECL is defined. This information is needed when
1365 writing debugging information about vfield and vbase decls for C++. */
1366 #define DECL_FCONTEXT(NODE) (FIELD_DECL_CHECK (NODE)->decl.vindex)
1368 /* Every ..._DECL node gets a unique number. */
1369 #define DECL_UID(NODE) (DECL_CHECK (NODE)->decl.uid)
1371 /* For any sort of a ..._DECL node, this points to the original (abstract)
1372 decl node which this decl is an instance of, or else it is NULL indicating
1373 that this decl is not an instance of some other decl. For example,
1374 in a nested declaration of an inline function, this points back to the
1376 #define DECL_ABSTRACT_ORIGIN(NODE) (DECL_CHECK (NODE)->decl.abstract_origin)
1378 /* Like DECL_ABSTRACT_ORIGIN, but returns NODE if there's no abstract
1379 origin. This is useful when setting the DECL_ABSTRACT_ORIGIN. */
1380 #define DECL_ORIGIN(NODE) \
1381 (DECL_ABSTRACT_ORIGIN (NODE) ? DECL_ABSTRACT_ORIGIN (NODE) : NODE)
1383 /* Nonzero for any sort of ..._DECL node means this decl node represents an
1384 inline instance of some original (abstract) decl from an inline function;
1385 suppress any warnings about shadowing some other variable. FUNCTION_DECL
1386 nodes can also have their abstract origin set to themselves. */
1387 #define DECL_FROM_INLINE(NODE) (DECL_ABSTRACT_ORIGIN (NODE) != (tree) 0 \
1388 && DECL_ABSTRACT_ORIGIN (NODE) != (NODE))
1390 /* Nonzero if a _DECL means that the name of this decl should be ignored
1391 for symbolic debug purposes. */
1392 #define DECL_IGNORED_P(NODE) (DECL_CHECK (NODE)->decl.ignored_flag)
1394 /* Nonzero for a given ..._DECL node means that this node represents an
1395 "abstract instance" of the given declaration (e.g. in the original
1396 declaration of an inline function). When generating symbolic debugging
1397 information, we mustn't try to generate any address information for nodes
1398 marked as "abstract instances" because we don't actually generate
1399 any code or allocate any data space for such instances. */
1400 #define DECL_ABSTRACT(NODE) (DECL_CHECK (NODE)->decl.abstract_flag)
1402 /* Nonzero if a _DECL means that no warnings should be generated just
1403 because this decl is unused. */
1404 #define DECL_IN_SYSTEM_HEADER(NODE) (DECL_CHECK (NODE)->decl.in_system_header_flag)
1406 /* Nonzero for a given ..._DECL node means that this node should be
1407 put in .common, if possible. If a DECL_INITIAL is given, and it
1408 is not error_mark_node, then the decl cannot be put in .common. */
1409 #define DECL_COMMON(NODE) (DECL_CHECK (NODE)->decl.common_flag)
1411 /* Language-specific decl information. */
1412 #define DECL_LANG_SPECIFIC(NODE) (DECL_CHECK (NODE)->decl.lang_specific)
1414 /* In a VAR_DECL or FUNCTION_DECL,
1415 nonzero means external reference:
1416 do not allocate storage, and refer to a definition elsewhere. */
1417 #define DECL_EXTERNAL(NODE) (DECL_CHECK (NODE)->decl.external_flag)
1419 /* In a VAR_DECL for a RECORD_TYPE, sets number for non-init_priority
1421 #define DEFAULT_INIT_PRIORITY 65535
1422 #define MAX_INIT_PRIORITY 65535
1423 #define MAX_RESERVED_INIT_PRIORITY 100
1426 nonzero means the detail info about this type is not dumped into stabs.
1427 Instead it will generate cross reference ('x') of names.
1428 This uses the same flag as DECL_EXTERNAL. */
1429 #define TYPE_DECL_SUPPRESS_DEBUG(NODE) \
1430 (TYPE_DECL_CHECK (NODE)->decl.external_flag)
1432 /* In VAR_DECL and PARM_DECL nodes, nonzero means declared `register'. */
1433 #define DECL_REGISTER(NODE) (DECL_CHECK (NODE)->decl.regdecl_flag)
1434 /* In LABEL_DECL nodes, nonzero means that an error message about
1435 jumping into such a binding contour has been printed for this label. */
1436 #define DECL_ERROR_ISSUED(NODE) (LABEL_DECL_CHECK (NODE)->decl.regdecl_flag)
1437 /* In a FIELD_DECL, indicates this field should be bit-packed. */
1438 #define DECL_PACKED(NODE) (FIELD_DECL_CHECK (NODE)->decl.regdecl_flag)
1439 /* In a FUNCTION_DECL with a non-zero DECL_CONTEXT, indicates that a
1440 static chain is not needed. */
1441 #define DECL_NO_STATIC_CHAIN(NODE) \
1442 (FUNCTION_DECL_CHECK (NODE)->decl.regdecl_flag)
1444 /* Nonzero in a ..._DECL means this variable is ref'd from a nested function.
1445 For VAR_DECL nodes, PARM_DECL nodes, and FUNCTION_DECL nodes.
1447 For LABEL_DECL nodes, nonzero if nonlocal gotos to the label are permitted.
1449 Also set in some languages for variables, etc., outside the normal
1450 lexical scope, such as class instance variables. */
1451 #define DECL_NONLOCAL(NODE) (DECL_CHECK (NODE)->decl.nonlocal_flag)
1453 /* Nonzero in a FUNCTION_DECL means this function can be substituted
1454 where it is called. */
1455 #define DECL_INLINE(NODE) (FUNCTION_DECL_CHECK (NODE)->decl.inline_flag)
1457 /* Nonzero in a FUNCTION_DECL means this is a built-in function
1458 that is not specified by ansi C and that users are supposed to be allowed
1459 to redefine for any purpose whatever. */
1460 #define DECL_BUILT_IN_NONANSI(NODE) \
1461 (FUNCTION_DECL_CHECK (NODE)->common.unsigned_flag)
1463 /* Nonzero in a FUNCTION_DECL means this function should be treated
1464 as if it were a malloc, meaning it returns a pointer that is
1466 #define DECL_IS_MALLOC(NODE) (FUNCTION_DECL_CHECK (NODE)->decl.malloc_flag)
1468 /* Nonzero in a FUNCTION_DECL means this function should be treated
1469 as "pure" function (like const function, but may read global memory). */
1470 #define DECL_IS_PURE(NODE) (FUNCTION_DECL_CHECK (NODE)->decl.pure_flag)
1472 /* Nonzero in a FIELD_DECL means it is a bit field, and must be accessed
1474 #define DECL_BIT_FIELD(NODE) (FIELD_DECL_CHECK (NODE)->decl.bit_field_flag)
1475 /* In a LABEL_DECL, nonzero means label was defined inside a binding
1476 contour that restored a stack level and which is now exited. */
1477 #define DECL_TOO_LATE(NODE) (LABEL_DECL_CHECK (NODE)->decl.bit_field_flag)
1479 /* Unused in FUNCTION_DECL. */
1481 /* In a VAR_DECL that's static,
1482 nonzero if the space is in the text section. */
1483 #define DECL_IN_TEXT_SECTION(NODE) (VAR_DECL_CHECK (NODE)->decl.bit_field_flag)
1485 /* In a FUNCTION_DECL, nonzero means a built in function. */
1486 #define DECL_BUILT_IN(NODE) (DECL_BUILT_IN_CLASS (NODE) != NOT_BUILT_IN)
1487 /* For a builtin function, identify which part of the compiler defined it. */
1488 #define DECL_BUILT_IN_CLASS(NODE) \
1489 (FUNCTION_DECL_CHECK (NODE)->decl.built_in_class)
1491 /* Used in VAR_DECLs to indicate that the variable is a vtable.
1492 Used in FIELD_DECLs for vtable pointers.
1493 Used in FUNCTION_DECLs to indicate that the function is virtual. */
1494 #define DECL_VIRTUAL_P(NODE) (DECL_CHECK (NODE)->decl.virtual_flag)
1496 /* Used to indicate that the linkage status of this DECL is not yet known,
1497 so it should not be output now. */
1498 #define DECL_DEFER_OUTPUT(NODE) (DECL_CHECK (NODE)->decl.defer_output)
1500 /* Used in PARM_DECLs whose type are unions to indicate that the
1501 argument should be passed in the same way that the first union
1502 alternative would be passed. */
1503 #define DECL_TRANSPARENT_UNION(NODE) \
1504 (PARM_DECL_CHECK (NODE)->decl.transparent_union)
1506 /* Used in FUNCTION_DECLs to indicate that they should be run automatically
1507 at the beginning or end of execution. */
1508 #define DECL_STATIC_CONSTRUCTOR(NODE) \
1509 (FUNCTION_DECL_CHECK (NODE)->decl.static_ctor_flag)
1511 #define DECL_STATIC_DESTRUCTOR(NODE) \
1512 (FUNCTION_DECL_CHECK (NODE)->decl.static_dtor_flag)
1514 /* Used to indicate that this DECL represents a compiler-generated entity. */
1515 #define DECL_ARTIFICIAL(NODE) (DECL_CHECK (NODE)->decl.artificial_flag)
1517 /* Used to indicate that this DECL has weak linkage. */
1518 #define DECL_WEAK(NODE) (DECL_CHECK (NODE)->decl.weak_flag)
1520 /* Used in TREE_PUBLIC decls to indicate that copies of this DECL in
1521 multiple translation units should be merged. */
1522 #define DECL_ONE_ONLY(NODE) (DECL_CHECK (NODE)->decl.transparent_union)
1524 /* Used in a DECL to indicate that, even if it TREE_PUBLIC, it need
1525 not be put out unless it is needed in this translation unit.
1526 Entities like this are shared across translation units (like weak
1527 entities), but are guaranteed to be generated by any translation
1528 unit that needs them, and therefore need not be put out anywhere
1529 where they are not needed. DECL_COMDAT is just a hint to the
1530 back-end; it is up to front-ends which set this flag to ensure
1531 that there will never be any harm, other than bloat, in putting out
1532 something which is DECL_COMDAT. */
1533 #define DECL_COMDAT(NODE) (DECL_CHECK (NODE)->decl.comdat_flag)
1535 /* Used in FUNCTION_DECLs to indicate that function entry and exit should
1536 be instrumented with calls to support routines. */
1537 #define DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT(NODE) \
1538 (FUNCTION_DECL_CHECK (NODE)->decl.no_instrument_function_entry_exit)
1540 /* Used in FUNCTION_DECLs to indicate that check-memory-usage should be
1541 disabled in this function. */
1542 #define DECL_NO_CHECK_MEMORY_USAGE(NODE) \
1543 (FUNCTION_DECL_CHECK (NODE)->decl.no_check_memory_usage)
1545 /* Used in FUNCTION_DECLs to indicate that limit-stack-* should be
1546 disabled in this function. */
1547 #define DECL_NO_LIMIT_STACK(NODE) \
1548 (FUNCTION_DECL_CHECK (NODE)->decl.no_limit_stack)
1550 /* Additional flags for language-specific uses. */
1551 #define DECL_LANG_FLAG_0(NODE) (DECL_CHECK (NODE)->decl.lang_flag_0)
1552 #define DECL_LANG_FLAG_1(NODE) (DECL_CHECK (NODE)->decl.lang_flag_1)
1553 #define DECL_LANG_FLAG_2(NODE) (DECL_CHECK (NODE)->decl.lang_flag_2)
1554 #define DECL_LANG_FLAG_3(NODE) (DECL_CHECK (NODE)->decl.lang_flag_3)
1555 #define DECL_LANG_FLAG_4(NODE) (DECL_CHECK (NODE)->decl.lang_flag_4)
1556 #define DECL_LANG_FLAG_5(NODE) (DECL_CHECK (NODE)->decl.lang_flag_5)
1557 #define DECL_LANG_FLAG_6(NODE) (DECL_CHECK (NODE)->decl.lang_flag_6)
1558 #define DECL_LANG_FLAG_7(NODE) (DECL_CHECK (NODE)->decl.lang_flag_7)
1560 /* Used to indicate that the pointer to this DECL cannot be treated as
1561 an address constant. */
1562 #define DECL_NON_ADDR_CONST_P(NODE) (DECL_CHECK (NODE)->decl.non_addr_const_p)
1564 /* Used in a FIELD_DECL to indicate that we cannot form the address of
1566 #define DECL_NONADDRESSABLE_P(NODE) \
1567 (FIELD_DECL_CHECK (NODE)->decl.non_addressable)
1569 /* Used to indicate an alias set for the memory pointed to by this
1570 particular FIELD_DECL, PARM_DECL, or VAR_DECL, which must have
1571 pointer (or reference) type. */
1572 #define DECL_POINTER_ALIAS_SET(NODE) \
1573 (DECL_CHECK (NODE)->decl.pointer_alias_set)
1575 /* Nonzero if an alias set has been assigned to this declaration. */
1576 #define DECL_POINTER_ALIAS_SET_KNOWN_P(NODE) \
1577 (DECL_POINTER_ALIAS_SET (NODE) != - 1)
1579 /* The pointer_depth field comprises two bits for values in the range
1580 0..3. The value is normally equal to TYPE_POINTER_DEPTH of decl's
1581 type node, but for functions it migth be greater. For example,
1582 this can happen when the function is declared to accept a parameter
1583 of type void* (depth=1), but is actually called with an argument of
1584 type foo** (depth=2). The function type will get the formal
1585 parameter's depth, but the function decl will get the actual
1586 argument's depth. */
1587 #define DECL_POINTER_DEPTH(DECL) (DECL_CHECK (DECL)->decl.pointer_depth)
1591 struct tree_common common;
1592 const char *filename;
1595 union tree_node *size;
1596 ENUM_BITFIELD(machine_mode) mode : 8;
1598 unsigned external_flag : 1;
1599 unsigned nonlocal_flag : 1;
1600 unsigned regdecl_flag : 1;
1601 unsigned inline_flag : 1;
1602 unsigned bit_field_flag : 1;
1603 unsigned virtual_flag : 1;
1604 unsigned ignored_flag : 1;
1605 unsigned abstract_flag : 1;
1607 unsigned in_system_header_flag : 1;
1608 unsigned common_flag : 1;
1609 unsigned defer_output : 1;
1610 unsigned transparent_union : 1;
1611 unsigned static_ctor_flag : 1;
1612 unsigned static_dtor_flag : 1;
1613 unsigned artificial_flag : 1;
1614 unsigned weak_flag : 1;
1616 unsigned non_addr_const_p : 1;
1617 unsigned no_instrument_function_entry_exit : 1;
1618 unsigned no_check_memory_usage : 1;
1619 unsigned comdat_flag : 1;
1620 unsigned malloc_flag : 1;
1621 unsigned no_limit_stack : 1;
1622 ENUM_BITFIELD(built_in_class) built_in_class : 2;
1624 unsigned pure_flag : 1;
1625 unsigned pointer_depth : 2;
1626 unsigned non_addressable : 1;
1627 unsigned user_align : 1;
1628 /* Three unused bits. */
1630 unsigned lang_flag_0 : 1;
1631 unsigned lang_flag_1 : 1;
1632 unsigned lang_flag_2 : 1;
1633 unsigned lang_flag_3 : 1;
1634 unsigned lang_flag_4 : 1;
1635 unsigned lang_flag_5 : 1;
1636 unsigned lang_flag_6 : 1;
1637 unsigned lang_flag_7 : 1;
1639 /* For a FUNCTION_DECL, if inline, this is the size of frame needed.
1640 If built-in, this is the code for which built-in function.
1641 For other kinds of decls, this is DECL_ALIGN and DECL_OFFSET_ALIGN. */
1644 enum built_in_function f;
1645 struct {unsigned int align : 24; unsigned int off_align : 8;} a;
1648 union tree_node *size_unit;
1649 union tree_node *name;
1650 union tree_node *context;
1651 union tree_node *arguments; /* Also used for DECL_FIELD_OFFSET */
1652 union tree_node *result; /* Also used for DECL_BIT_FIELD_TYPE */
1653 union tree_node *initial; /* Also used for DECL_QUALIFIER */
1654 union tree_node *abstract_origin;
1655 union tree_node *assembler_name;
1656 union tree_node *section_name;
1657 union tree_node *machine_attributes;
1658 struct rtx_def *rtl; /* RTL representation for object. */
1659 struct rtx_def *live_range_rtl;
1661 /* In FUNCTION_DECL, if it is inline, holds the saved insn chain.
1662 In FIELD_DECL, is DECL_FIELD_BIT_OFFSET.
1663 In PARM_DECL, holds an RTL for the stack slot
1664 of register where the data was actually passed.
1665 Used by Chill and Java in LABEL_DECL and by C++ and Java in VAR_DECL. */
1673 union tree_node *vindex;
1674 HOST_WIDE_INT pointer_alias_set;
1675 /* Points to a structure whose details depend on the language in use. */
1676 struct lang_decl *lang_specific;
1679 /* Define the overall contents of a tree node.
1680 It may be any of the structures declared above
1681 for various types of node. */
1685 struct tree_common common;
1686 struct tree_int_cst int_cst;
1687 struct tree_real_cst real_cst;
1688 struct tree_string string;
1689 struct tree_complex complex;
1690 struct tree_identifier identifier;
1691 struct tree_decl decl;
1692 struct tree_type type;
1693 struct tree_list list;
1694 struct tree_vec vec;
1695 struct tree_exp exp;
1696 struct tree_block block;
1699 /* Standard named or nameless data types of the C compiler. */
1718 TI_INTEGER_MINUS_ONE,
1728 TI_COMPLEX_INTEGER_TYPE,
1729 TI_COMPLEX_FLOAT_TYPE,
1730 TI_COMPLEX_DOUBLE_TYPE,
1731 TI_COMPLEX_LONG_DOUBLE_TYPE,
1735 TI_LONG_DOUBLE_TYPE,
1756 extern tree global_trees[TI_MAX];
1758 #define error_mark_node global_trees[TI_ERROR_MARK]
1760 #define intQI_type_node global_trees[TI_INTQI_TYPE]
1761 #define intHI_type_node global_trees[TI_INTHI_TYPE]
1762 #define intSI_type_node global_trees[TI_INTSI_TYPE]
1763 #define intDI_type_node global_trees[TI_INTDI_TYPE]
1764 #define intTI_type_node global_trees[TI_INTTI_TYPE]
1766 #define unsigned_intQI_type_node global_trees[TI_UINTQI_TYPE]
1767 #define unsigned_intHI_type_node global_trees[TI_UINTHI_TYPE]
1768 #define unsigned_intSI_type_node global_trees[TI_UINTSI_TYPE]
1769 #define unsigned_intDI_type_node global_trees[TI_UINTDI_TYPE]
1770 #define unsigned_intTI_type_node global_trees[TI_UINTTI_TYPE]
1772 #define integer_zero_node global_trees[TI_INTEGER_ZERO]
1773 #define integer_one_node global_trees[TI_INTEGER_ONE]
1774 #define integer_minus_one_node global_trees[TI_INTEGER_MINUS_ONE]
1775 #define size_zero_node global_trees[TI_SIZE_ZERO]
1776 #define size_one_node global_trees[TI_SIZE_ONE]
1777 #define bitsize_zero_node global_trees[TI_BITSIZE_ZERO]
1778 #define bitsize_one_node global_trees[TI_BITSIZE_ONE]
1779 #define bitsize_unit_node global_trees[TI_BITSIZE_UNIT]
1781 #define null_pointer_node global_trees[TI_NULL_POINTER]
1783 #define float_type_node global_trees[TI_FLOAT_TYPE]
1784 #define double_type_node global_trees[TI_DOUBLE_TYPE]
1785 #define long_double_type_node global_trees[TI_LONG_DOUBLE_TYPE]
1787 #define complex_integer_type_node global_trees[TI_COMPLEX_INTEGER_TYPE]
1788 #define complex_float_type_node global_trees[TI_COMPLEX_FLOAT_TYPE]
1789 #define complex_double_type_node global_trees[TI_COMPLEX_DOUBLE_TYPE]
1790 #define complex_long_double_type_node global_trees[TI_COMPLEX_LONG_DOUBLE_TYPE]
1792 #define void_type_node global_trees[TI_VOID_TYPE]
1793 /* The C type `void *'. */
1794 #define ptr_type_node global_trees[TI_PTR_TYPE]
1795 /* The C type `const void *'. */
1796 #define const_ptr_type_node global_trees[TI_CONST_PTR_TYPE]
1797 #define ptrdiff_type_node global_trees[TI_PTRDIFF_TYPE]
1798 #define va_list_type_node global_trees[TI_VA_LIST_TYPE]
1800 /* The node that should be placed at the end of a parameter list to
1801 indicate that the function does not take a variable number of
1802 arguments. The TREE_VALUE will be void_type_node and there will be
1803 no TREE_CHAIN. Language-independent code should not assume
1804 anything else about this node. */
1805 #define void_list_node global_trees[TI_VOID_LIST_NODE]
1807 #define main_identifier_node global_trees[TI_MAIN_IDENTIFIER]
1808 #define MAIN_NAME_P(NODE) (IDENTIFIER_NODE_CHECK (NODE) == main_identifier_node)
1810 #define V4SF_type_node global_trees[TI_V4SF_TYPE]
1811 #define V4SI_type_node global_trees[TI_V4SI_TYPE]
1812 #define V8QI_type_node global_trees[TI_V8QI_TYPE]
1813 #define V4HI_type_node global_trees[TI_V4HI_TYPE]
1814 #define V2SI_type_node global_trees[TI_V2SI_TYPE]
1816 /* An enumeration of the standard C integer types. These must be
1817 ordered so that shorter types appear before longer ones. */
1818 enum integer_type_kind
1830 itk_unsigned_long_long,
1834 typedef enum integer_type_kind integer_type_kind;
1836 /* The standard C integer types. Use integer_type_kind to index into
1838 extern tree integer_types[itk_none];
1840 #define char_type_node integer_types[itk_char]
1841 #define signed_char_type_node integer_types[itk_signed_char]
1842 #define unsigned_char_type_node integer_types[itk_unsigned_char]
1843 #define short_integer_type_node integer_types[itk_short]
1844 #define short_unsigned_type_node integer_types[itk_unsigned_short]
1845 #define integer_type_node integer_types[itk_int]
1846 #define unsigned_type_node integer_types[itk_unsigned_int]
1847 #define long_integer_type_node integer_types[itk_long]
1848 #define long_unsigned_type_node integer_types[itk_unsigned_long]
1849 #define long_long_integer_type_node integer_types[itk_long_long]
1850 #define long_long_unsigned_type_node integer_types[itk_unsigned_long_long]
1853 #define NULL_TREE (tree) NULL
1855 /* The following functions accept a wide integer argument. Rather than
1856 having to cast on every function call, we use a macro instead, that is
1857 defined here and in rtl.h. */
1860 #define exact_log2(N) exact_log2_wide ((unsigned HOST_WIDE_INT) (N))
1861 #define floor_log2(N) floor_log2_wide ((unsigned HOST_WIDE_INT) (N))
1863 extern int exact_log2_wide PARAMS ((unsigned HOST_WIDE_INT));
1864 extern int floor_log2_wide PARAMS ((unsigned HOST_WIDE_INT));
1866 /* Approximate positive square root of a host double. This is for
1867 statistical reports, not code generation. */
1868 extern double approx_sqrt PARAMS ((double));
1870 extern char *permalloc PARAMS ((int));
1871 extern char *expralloc PARAMS ((int));
1873 /* Compute the number of bytes occupied by 'node'. This routine only
1874 looks at TREE_CODE and, if the code is TREE_VEC, TREE_VEC_LENGTH. */
1876 extern size_t tree_size PARAMS ((tree));
1878 /* Lowest level primitive for allocating a node.
1879 The TREE_CODE is the only argument. Contents are initialized
1880 to zero except for a few of the common fields. */
1882 extern tree make_node PARAMS ((enum tree_code));
1883 extern tree make_lang_type PARAMS ((enum tree_code));
1884 extern tree (*make_lang_type_fn) PARAMS ((enum tree_code));
1886 /* Make a copy of a node, with all the same contents except
1887 for TREE_PERMANENT. (The copy is permanent
1888 iff nodes being made now are permanent.) */
1890 extern tree copy_node PARAMS ((tree));
1892 /* Make a copy of a chain of TREE_LIST nodes. */
1894 extern tree copy_list PARAMS ((tree));
1896 /* Make a TREE_VEC. */
1898 extern tree make_tree_vec PARAMS ((int));
1900 /* Return the (unique) IDENTIFIER_NODE node for a given name.
1901 The name is supplied as a char *. */
1903 extern tree get_identifier PARAMS ((const char *));
1905 /* If an identifier with the name TEXT (a null-terminated string) has
1906 previously been referred to, return that node; otherwise return
1909 extern tree maybe_get_identifier PARAMS ((const char *));
1911 /* Construct various types of nodes. */
1913 #define build_int_2(LO,HI) \
1914 build_int_2_wide ((unsigned HOST_WIDE_INT) (LO), (HOST_WIDE_INT) (HI))
1916 extern tree build PARAMS ((enum tree_code, tree, ...));
1917 extern tree build_nt PARAMS ((enum tree_code, ...));
1918 extern tree build_parse_node PARAMS ((enum tree_code, ...));
1920 extern tree build_int_2_wide PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT));
1921 extern tree build_real PARAMS ((tree, REAL_VALUE_TYPE));
1922 extern tree build_real_from_int_cst PARAMS ((tree, tree));
1923 extern tree build_complex PARAMS ((tree, tree, tree));
1924 extern tree build_string PARAMS ((int, const char *));
1925 extern tree build1 PARAMS ((enum tree_code, tree, tree));
1926 extern tree build_tree_list PARAMS ((tree, tree));
1927 extern tree build_decl PARAMS ((enum tree_code, tree, tree));
1928 extern tree build_block PARAMS ((tree, tree, tree, tree, tree));
1929 extern tree build_expr_wfl PARAMS ((tree, const char *, int, int));
1931 /* Construct various nodes representing data types. */
1933 extern tree make_signed_type PARAMS ((int));
1934 extern tree make_unsigned_type PARAMS ((int));
1935 extern void initialize_sizetypes PARAMS ((void));
1936 extern void set_sizetype PARAMS ((tree));
1937 extern tree signed_or_unsigned_type PARAMS ((int, tree));
1938 extern void fixup_unsigned_type PARAMS ((tree));
1939 extern tree build_pointer_type PARAMS ((tree));
1940 extern tree build_reference_type PARAMS ((tree));
1941 extern tree build_type_no_quals PARAMS ((tree));
1942 extern tree build_index_type PARAMS ((tree));
1943 extern tree build_index_2_type PARAMS ((tree, tree));
1944 extern tree build_array_type PARAMS ((tree, tree));
1945 extern tree build_function_type PARAMS ((tree, tree));
1946 extern tree build_method_type PARAMS ((tree, tree));
1947 extern tree build_offset_type PARAMS ((tree, tree));
1948 extern tree build_complex_type PARAMS ((tree));
1949 extern tree array_type_nelts PARAMS ((tree));
1951 extern tree value_member PARAMS ((tree, tree));
1952 extern tree purpose_member PARAMS ((tree, tree));
1953 extern tree binfo_member PARAMS ((tree, tree));
1954 extern unsigned int attribute_hash_list PARAMS ((tree));
1955 extern int attribute_list_equal PARAMS ((tree, tree));
1956 extern int attribute_list_contained PARAMS ((tree, tree));
1957 extern int tree_int_cst_equal PARAMS ((tree, tree));
1958 extern int tree_int_cst_lt PARAMS ((tree, tree));
1959 extern int tree_int_cst_compare PARAMS ((tree, tree));
1960 extern int host_integerp PARAMS ((tree, int));
1961 extern HOST_WIDE_INT tree_low_cst PARAMS ((tree, int));
1962 extern int tree_int_cst_msb PARAMS ((tree));
1963 extern int tree_int_cst_sgn PARAMS ((tree));
1964 extern int tree_expr_nonnegative_p PARAMS ((tree));
1965 extern int rtl_expr_nonnegative_p PARAMS ((struct rtx_def *));
1966 extern int index_type_equal PARAMS ((tree, tree));
1967 extern tree get_inner_array_type PARAMS ((tree));
1969 /* From expmed.c. Since rtl.h is included after tree.h, we can't
1970 put the prototype here. Rtl.h does declare the prototype if
1971 tree.h had been included. */
1973 extern tree make_tree PARAMS ((tree, struct rtx_def *));
1975 /* Return a type like TTYPE except that its TYPE_ATTRIBUTES
1978 Such modified types already made are recorded so that duplicates
1981 extern tree build_type_attribute_variant PARAMS ((tree, tree));
1982 extern tree build_decl_attribute_variant PARAMS ((tree, tree));
1984 extern tree merge_machine_decl_attributes PARAMS ((tree, tree));
1985 extern tree merge_machine_type_attributes PARAMS ((tree, tree));
1987 /* Split a list of declspecs and attributes into two. */
1989 extern void split_specs_attrs PARAMS ((tree, tree *, tree *));
1991 /* Strip attributes from a list of combined specs and attrs. */
1993 extern tree strip_attrs PARAMS ((tree));
1995 /* Return 1 if an attribute and its arguments are valid for a decl or type. */
1997 extern int valid_machine_attribute PARAMS ((tree, tree, tree, tree));
1999 /* Given a tree node and a string, return non-zero if the tree node is
2000 a valid attribute name for the string. */
2002 extern int is_attribute_p PARAMS ((const char *, tree));
2004 /* Given an attribute name and a list of attributes, return the list element
2005 of the attribute or NULL_TREE if not found. */
2007 extern tree lookup_attribute PARAMS ((const char *, tree));
2009 /* Given two attributes lists, return a list of their union. */
2011 extern tree merge_attributes PARAMS ((tree, tree));
2013 /* Given a type node TYPE and a TYPE_QUALIFIER_SET, return a type for
2014 the same kind of data as TYPE describes. Variants point to the
2015 "main variant" (which has no qualifiers set) via TYPE_MAIN_VARIANT,
2016 and it points to a chain of other variants so that duplicate
2017 variants are never made. Only main variants should ever appear as
2018 types of expressions. */
2020 extern tree build_qualified_type PARAMS ((tree, int));
2022 /* Like build_qualified_type, but only deals with the `const' and
2023 `volatile' qualifiers. This interface is retained for backwards
2024 compatiblity with the various front-ends; new code should use
2025 build_qualified_type instead. */
2027 #define build_type_variant(TYPE, CONST_P, VOLATILE_P) \
2028 build_qualified_type (TYPE, \
2029 ((CONST_P) ? TYPE_QUAL_CONST : 0) \
2030 | ((VOLATILE_P) ? TYPE_QUAL_VOLATILE : 0))
2032 /* Make a copy of a type node. */
2034 extern tree build_type_copy PARAMS ((tree));
2036 /* Given a ..._TYPE node, calculate the TYPE_SIZE, TYPE_SIZE_UNIT,
2037 TYPE_ALIGN and TYPE_MODE fields. If called more than once on one
2038 node, does nothing except for the first time. */
2040 extern void layout_type PARAMS ((tree));
2042 /* These functions allow a front-end to perform a manual layout of a
2043 RECORD_TYPE. (For instance, if the placement of subsequent fields
2044 depends on the placement of fields so far.) Begin by calling
2045 start_record_layout. Then, call place_field for each of the
2046 fields. Then, call finish_record_layout. See layout_type for the
2047 default way in which these functions are used. */
2049 typedef struct record_layout_info_s
2051 /* The RECORD_TYPE that we are laying out. */
2053 /* The offset into the record so far, in bytes, not including bits in
2056 /* The last known alignment of SIZE. */
2057 unsigned int offset_align;
2058 /* The bit position within the last OFFSET_ALIGN bits, in bits. */
2060 /* The alignment of the record so far, in bits. */
2061 unsigned int record_align;
2062 /* The alignment of the record so far, not including padding, in bits. */
2063 unsigned int unpacked_align;
2064 /* The static variables (i.e., class variables, as opposed to
2065 instance variables) encountered in T. */
2066 tree pending_statics;
2067 int packed_maybe_necessary;
2068 } *record_layout_info;
2070 extern record_layout_info start_record_layout PARAMS ((tree));
2071 extern tree bit_from_pos PARAMS ((tree, tree));
2072 extern tree byte_from_pos PARAMS ((tree, tree));
2073 extern void pos_from_byte PARAMS ((tree *, tree *, unsigned int,
2075 extern void pos_from_bit PARAMS ((tree *, tree *, unsigned int,
2077 extern void normalize_offset PARAMS ((tree *, tree *,
2079 extern tree rli_size_unit_so_far PARAMS ((record_layout_info));
2080 extern tree rli_size_so_far PARAMS ((record_layout_info));
2081 extern void normalize_rli PARAMS ((record_layout_info));
2082 extern void place_field PARAMS ((record_layout_info, tree));
2083 extern void compute_record_mode PARAMS ((tree));
2084 extern void finish_record_layout PARAMS ((record_layout_info));
2086 /* Given a hashcode and a ..._TYPE node (for which the hashcode was made),
2087 return a canonicalized ..._TYPE node, so that duplicates are not made.
2088 How the hash code is computed is up to the caller, as long as any two
2089 callers that could hash identical-looking type nodes agree. */
2091 extern tree type_hash_canon PARAMS ((unsigned int, tree));
2093 /* Given a VAR_DECL, PARM_DECL, RESULT_DECL or FIELD_DECL node,
2094 calculates the DECL_SIZE, DECL_SIZE_UNIT, DECL_ALIGN and DECL_MODE
2095 fields. Call this only once for any given decl node.
2097 Second argument is the boundary that this field can be assumed to
2098 be starting at (in bits). Zero means it can be assumed aligned
2099 on any boundary that may be needed. */
2101 extern void layout_decl PARAMS ((tree, unsigned));
2103 /* Return the mode for data of a given size SIZE and mode class CLASS.
2104 If LIMIT is nonzero, then don't use modes bigger than MAX_FIXED_MODE_SIZE.
2105 The value is BLKmode if no other mode is found. This is like
2106 mode_for_size, but is passed a tree. */
2108 extern enum machine_mode mode_for_size_tree PARAMS ((tree, enum mode_class,
2111 /* Return an expr equal to X but certainly not valid as an lvalue. */
2113 extern tree non_lvalue PARAMS ((tree));
2114 extern tree pedantic_non_lvalue PARAMS ((tree));
2116 extern tree convert PARAMS ((tree, tree));
2117 extern unsigned int expr_align PARAMS ((tree));
2118 extern tree size_in_bytes PARAMS ((tree));
2119 extern HOST_WIDE_INT int_size_in_bytes PARAMS ((tree));
2120 extern tree bit_position PARAMS ((tree));
2121 extern HOST_WIDE_INT int_bit_position PARAMS ((tree));
2122 extern tree byte_position PARAMS ((tree));
2123 extern HOST_WIDE_INT int_byte_position PARAMS ((tree));
2125 /* Define data structures, macros, and functions for handling sizes
2126 and the various types used to represent sizes. */
2130 SIZETYPE, /* Normal representation of sizes in bytes. */
2131 SSIZETYPE, /* Signed representation of sizes in bytes. */
2132 USIZETYPE, /* Unsigned representation of sizes in bytes. */
2133 BITSIZETYPE, /* Normal representation of sizes in bits. */
2134 SBITSIZETYPE, /* Signed representation of sizes in bits. */
2135 UBITSIZETYPE, /* Unsifgned representation of sizes in bits. */
2138 extern tree sizetype_tab[(int) TYPE_KIND_LAST];
2140 #define sizetype sizetype_tab[(int) SIZETYPE]
2141 #define bitsizetype sizetype_tab[(int) BITSIZETYPE]
2142 #define ssizetype sizetype_tab[(int) SSIZETYPE]
2143 #define usizetype sizetype_tab[(int) USIZETYPE]
2144 #define sbitsizetype sizetype_tab[(int) SBITSIZETYPE]
2145 #define ubitsizetype sizetype_tab[(int) UBITSIZETYPE]
2147 extern tree size_binop PARAMS ((enum tree_code, tree, tree));
2148 extern tree size_diffop PARAMS ((tree, tree));
2149 extern tree size_int_wide PARAMS ((HOST_WIDE_INT,
2150 enum size_type_kind));
2151 extern tree size_int_type_wide PARAMS ((HOST_WIDE_INT, tree));
2153 #define size_int_type(L, T) size_int_type_wide ((HOST_WIDE_INT) (L), T)
2154 #define size_int(L) size_int_wide ((HOST_WIDE_INT) (L), SIZETYPE)
2155 #define ssize_int(L) size_int_wide ((HOST_WIDE_INT) (L), SSIZETYPE)
2156 #define bitsize_int(L) size_int_wide ((HOST_WIDE_INT) (L), BITSIZETYPE)
2157 #define sbitsize_int(L) size_int_wide ((HOST_WIDE_INT) (L), SBITSIZETYPE)
2159 extern tree round_up PARAMS ((tree, int));
2160 extern tree round_down PARAMS ((tree, int));
2161 extern tree get_pending_sizes PARAMS ((void));
2162 extern void put_pending_sizes PARAMS ((tree));
2164 /* Type for sizes of data-type. */
2166 #define BITS_PER_UNIT_LOG \
2167 ((BITS_PER_UNIT > 1) + (BITS_PER_UNIT > 2) + (BITS_PER_UNIT > 4) \
2168 + (BITS_PER_UNIT > 8) + (BITS_PER_UNIT > 16) + (BITS_PER_UNIT > 32) \
2169 + (BITS_PER_UNIT > 64) + (BITS_PER_UNIT > 128) + (BITS_PER_UNIT > 256))
2171 /* If nonzero, an upper limit on alignment of structure fields, in bits. */
2172 extern unsigned int maximum_field_alignment;
2174 /* If non-zero, the alignment of a bitstring or (power-)set value, in bits. */
2175 extern unsigned int set_alignment;
2177 /* Concatenate two lists (chains of TREE_LIST nodes) X and Y
2178 by making the last node in X point to Y.
2179 Returns X, except if X is 0 returns Y. */
2181 extern tree chainon PARAMS ((tree, tree));
2183 /* Make a new TREE_LIST node from specified PURPOSE, VALUE and CHAIN. */
2185 extern tree tree_cons PARAMS ((tree, tree, tree));
2187 /* Return the last tree node in a chain. */
2189 extern tree tree_last PARAMS ((tree));
2191 /* Reverse the order of elements in a chain, and return the new head. */
2193 extern tree nreverse PARAMS ((tree));
2195 /* Returns the length of a chain of nodes
2196 (number of chain pointers to follow before reaching a null pointer). */
2198 extern int list_length PARAMS ((tree));
2200 /* Returns the number of FIELD_DECLs in a type. */
2202 extern int fields_length PARAMS ((tree));
2204 /* integer_zerop (tree x) is nonzero if X is an integer constant of value 0 */
2206 extern int integer_zerop PARAMS ((tree));
2208 /* integer_onep (tree x) is nonzero if X is an integer constant of value 1 */
2210 extern int integer_onep PARAMS ((tree));
2212 /* integer_all_onesp (tree x) is nonzero if X is an integer constant
2213 all of whose significant bits are 1. */
2215 extern int integer_all_onesp PARAMS ((tree));
2217 /* integer_pow2p (tree x) is nonzero is X is an integer constant with
2218 exactly one bit 1. */
2220 extern int integer_pow2p PARAMS ((tree));
2222 /* staticp (tree x) is nonzero if X is a reference to data allocated
2223 at a fixed address in memory. */
2225 extern int staticp PARAMS ((tree));
2227 /* Gets an error if argument X is not an lvalue.
2228 Also returns 1 if X is an lvalue, 0 if not. */
2230 extern int lvalue_or_else PARAMS ((tree, const char *));
2232 /* save_expr (EXP) returns an expression equivalent to EXP
2233 but it can be used multiple times within context CTX
2234 and only evaluate EXP once. */
2236 extern tree save_expr PARAMS ((tree));
2238 /* Returns the index of the first non-tree operand for CODE, or the number
2239 of operands if all are trees. */
2241 extern int first_rtl_op PARAMS ((enum tree_code));
2243 /* unsave_expr (EXP) returns an expression equivalent to EXP but it
2244 can be used multiple times and will evaluate EXP in its entirety
2247 extern tree unsave_expr PARAMS ((tree));
2249 /* Reset EXP in place so that it can be expaned again. Does not
2250 recurse into subtrees. */
2252 extern void unsave_expr_1 PARAMS ((tree));
2254 /* Like unsave_expr_1, but recurses into all subtrees. */
2256 extern tree unsave_expr_now PARAMS ((tree));
2258 /* If non-null, these are language-specific helper functions for
2259 unsave_expr_now. If present, LANG_UNSAVE is called before its
2260 argument (an UNSAVE_EXPR) is to be unsaved, and all other
2261 processing in unsave_expr_now is aborted. LANG_UNSAVE_EXPR_NOW is
2262 called from unsave_expr_1 for language-specific tree codes. */
2263 extern void (*lang_unsave) PARAMS ((tree *));
2264 extern void (*lang_unsave_expr_now) PARAMS ((tree));
2266 /* Return 0 if it is safe to evaluate EXPR multiple times,
2267 return 1 if it is safe if EXPR is unsaved afterward, or
2268 return 2 if it is completely unsafe. */
2269 extern int unsafe_for_reeval PARAMS ((tree));
2271 /* If non-null, these are language-specific helper functions for
2272 unsafe_for_reeval. Return negative to not handle some tree. */
2273 extern int (*lang_unsafe_for_reeval) PARAMS ((tree));
2275 /* Return 1 if EXP contains a PLACEHOLDER_EXPR; i.e., if it represents a size
2276 or offset that depends on a field within a record.
2278 Note that we only allow such expressions within simple arithmetic
2281 extern int contains_placeholder_p PARAMS ((tree));
2283 /* Return 1 if EXP contains any expressions that produce cleanups for an
2284 outer scope to deal with. Used by fold. */
2286 extern int has_cleanups PARAMS ((tree));
2288 /* Given a tree EXP, a FIELD_DECL F, and a replacement value R,
2289 return a tree with all occurrences of references to F in a
2290 PLACEHOLDER_EXPR replaced by R. Note that we assume here that EXP
2291 contains only arithmetic expressions. */
2293 extern tree substitute_in_expr PARAMS ((tree, tree, tree));
2295 /* variable_size (EXP) is like save_expr (EXP) except that it
2296 is for the special case of something that is part of a
2297 variable size for a data type. It makes special arrangements
2298 to compute the value at the right time when the data type
2299 belongs to a function parameter. */
2301 extern tree variable_size PARAMS ((tree));
2303 /* stabilize_reference (EXP) returns an reference equivalent to EXP
2304 but it can be used multiple times
2305 and only evaluate the subexpressions once. */
2307 extern tree stabilize_reference PARAMS ((tree));
2309 /* Subroutine of stabilize_reference; this is called for subtrees of
2310 references. Any expression with side-effects must be put in a SAVE_EXPR
2311 to ensure that it is only evaluated once. */
2313 extern tree stabilize_reference_1 PARAMS ((tree));
2315 /* Return EXP, stripped of any conversions to wider types
2316 in such a way that the result of converting to type FOR_TYPE
2317 is the same as if EXP were converted to FOR_TYPE.
2318 If FOR_TYPE is 0, it signifies EXP's type. */
2320 extern tree get_unwidened PARAMS ((tree, tree));
2322 /* Return OP or a simpler expression for a narrower value
2323 which can be sign-extended or zero-extended to give back OP.
2324 Store in *UNSIGNEDP_PTR either 1 if the value should be zero-extended
2325 or 0 if the value should be sign-extended. */
2327 extern tree get_narrower PARAMS ((tree, int *));
2329 /* Given MODE and UNSIGNEDP, return a suitable type-tree
2331 The definition of this resides in language-specific code
2332 as the repertoire of available types may vary. */
2334 extern tree type_for_mode PARAMS ((enum machine_mode, int));
2336 /* Given PRECISION and UNSIGNEDP, return a suitable type-tree
2337 for an integer type with at least that precision.
2338 The definition of this resides in language-specific code
2339 as the repertoire of available types may vary. */
2341 extern tree type_for_size PARAMS ((unsigned, int));
2343 /* Given an integer type T, return a type like T but unsigned.
2344 If T is unsigned, the value is T.
2345 The definition of this resides in language-specific code
2346 as the repertoire of available types may vary. */
2348 extern tree unsigned_type PARAMS ((tree));
2350 /* Given an integer type T, return a type like T but signed.
2351 If T is signed, the value is T.
2352 The definition of this resides in language-specific code
2353 as the repertoire of available types may vary. */
2355 extern tree signed_type PARAMS ((tree));
2357 /* This function must be defined in the language-specific files.
2358 expand_expr calls it to build the cleanup-expression for a TARGET_EXPR.
2359 This is defined in a language-specific file. */
2361 extern tree maybe_build_cleanup PARAMS ((tree));
2363 /* Given an expression EXP that may be a COMPONENT_REF or an ARRAY_REF,
2364 look for nested component-refs or array-refs at constant positions
2365 and find the ultimate containing object, which is returned. */
2367 extern tree get_inner_reference PARAMS ((tree, HOST_WIDE_INT *,
2368 HOST_WIDE_INT *, tree *,
2369 enum machine_mode *, int *,
2370 int *, unsigned int *));
2372 /* Given a DECL or TYPE, return the scope in which it was declared, or
2373 NUL_TREE if there is no containing scope. */
2375 extern tree get_containing_scope PARAMS ((tree));
2377 /* Return the FUNCTION_DECL which provides this _DECL with its context,
2379 extern tree decl_function_context PARAMS ((tree));
2381 /* Return the RECORD_TYPE, UNION_TYPE, or QUAL_UNION_TYPE which provides
2382 this _DECL with its context, or zero if none. */
2383 extern tree decl_type_context PARAMS ((tree));
2385 /* Given the FUNCTION_DECL for the current function,
2386 return zero if it is ok for this function to be inline.
2387 Otherwise return a warning message with a single %s
2388 for the function's name. */
2390 extern const char *function_cannot_inline_p PARAMS ((tree));
2392 /* Return 1 if EXPR is the real constant zero. */
2393 extern int real_zerop PARAMS ((tree));
2395 /* Declare commonly used variables for tree structure. */
2397 /* Points to the name of the input file from which the current input
2398 being parsed originally came (before it went into cpp). */
2399 extern const char *input_filename;
2401 /* Current line number in input file. */
2404 /* Nonzero for -pedantic switch: warn about anything
2405 that standard C forbids. */
2406 extern int pedantic;
2408 /* Nonzero means lvalues are limited to those valid in pedantic ANSI C.
2409 Zero means allow extended lvalues. */
2411 extern int pedantic_lvalues;
2413 /* Nonzero means can safely call expand_expr now;
2414 otherwise layout_type puts variable sizes onto `pending_sizes' instead. */
2416 extern int immediate_size_expand;
2418 /* Points to the FUNCTION_DECL of the function whose body we are reading. */
2420 extern tree current_function_decl;
2422 /* Nonzero means a FUNC_BEGIN label was emitted. */
2423 extern tree current_function_func_begin_label;
2425 /* Nonzero means all ..._TYPE nodes should be allocated permanently. */
2427 extern int all_types_permanent;
2429 /* Pointer to function to compute the name to use to print a declaration.
2430 DECL is the declaration in question.
2431 VERBOSITY determines what information will be printed:
2432 0: DECL_NAME, demangled as necessary.
2433 1: and scope information.
2434 2: and any other information that might be interesting, such as function
2435 parameter types in C++. */
2437 extern const char *(*decl_printable_name) PARAMS ((tree, int));
2439 /* Pointer to function to finish handling an incomplete decl at the
2440 end of compilation. */
2442 extern void (*incomplete_decl_finalize_hook) PARAMS ((tree));
2444 extern const char *init_parse PARAMS ((const char *));
2445 extern void finish_parse PARAMS ((void));
2447 extern const char * const language_string;
2449 /* Declare a predefined function. Return the declaration. This function is
2450 provided by each language frontend. */
2451 extern tree builtin_function PARAMS ((const char *, tree, int,
2452 enum built_in_class,
2456 extern char *perm_calloc PARAMS ((int, long));
2457 extern void clean_symbol_name PARAMS ((char *));
2458 extern tree get_file_function_name_long PARAMS ((const char *));
2459 extern tree get_set_constructor_bits PARAMS ((tree, char *, int));
2460 extern tree get_set_constructor_bytes PARAMS ((tree,
2461 unsigned char *, int));
2462 extern tree get_callee_fndecl PARAMS ((tree));
2466 extern int in_control_zone_p PARAMS ((void));
2467 extern void expand_fixups PARAMS ((struct rtx_def *));
2468 extern tree expand_start_stmt_expr PARAMS ((void));
2469 extern tree expand_end_stmt_expr PARAMS ((tree));
2470 extern void expand_expr_stmt PARAMS ((tree));
2471 extern int warn_if_unused_value PARAMS ((tree));
2472 extern void expand_decl_init PARAMS ((tree));
2473 extern void clear_last_expr PARAMS ((void));
2474 extern void expand_label PARAMS ((tree));
2475 extern void expand_goto PARAMS ((tree));
2476 extern void expand_asm PARAMS ((tree));
2477 extern void expand_start_cond PARAMS ((tree, int));
2478 extern void expand_end_cond PARAMS ((void));
2479 extern void expand_start_else PARAMS ((void));
2480 extern void expand_start_elseif PARAMS ((tree));
2481 extern struct nesting *expand_start_loop PARAMS ((int));
2482 extern struct nesting *expand_start_loop_continue_elsewhere PARAMS ((int));
2483 extern struct nesting *expand_start_null_loop PARAMS ((void));
2484 extern void expand_loop_continue_here PARAMS ((void));
2485 extern void expand_end_loop PARAMS ((void));
2486 extern void expand_end_null_loop PARAMS ((void));
2487 extern int expand_continue_loop PARAMS ((struct nesting *));
2488 extern int expand_exit_loop PARAMS ((struct nesting *));
2489 extern int expand_exit_loop_if_false PARAMS ((struct nesting *,
2491 extern int expand_exit_something PARAMS ((void));
2493 extern void expand_null_return PARAMS ((void));
2494 extern void expand_return PARAMS ((tree));
2495 extern int optimize_tail_recursion PARAMS ((tree, struct rtx_def *));
2496 extern void expand_start_bindings_and_block PARAMS ((int, tree));
2497 #define expand_start_bindings(flags) \
2498 expand_start_bindings_and_block(flags, NULL_TREE)
2499 extern void expand_end_bindings PARAMS ((tree, int, int));
2500 extern void warn_about_unused_variables PARAMS ((tree));
2501 extern void start_cleanup_deferral PARAMS ((void));
2502 extern void end_cleanup_deferral PARAMS ((void));
2503 extern int is_body_block PARAMS ((tree));
2505 extern void mark_block_as_eh_region PARAMS ((void));
2506 extern void mark_block_as_not_eh_region PARAMS ((void));
2507 extern int is_eh_region PARAMS ((void));
2508 extern int conditional_context PARAMS ((void));
2509 extern tree last_cleanup_this_contour PARAMS ((void));
2510 extern int expand_dhc_cleanup PARAMS ((tree));
2511 extern int expand_dcc_cleanup PARAMS ((tree));
2512 extern void expand_start_case PARAMS ((int, tree, tree,
2514 extern void expand_end_case PARAMS ((tree));
2515 extern int add_case_node PARAMS ((tree, tree,
2517 extern int pushcase PARAMS ((tree,
2518 tree (*) (tree, tree),
2520 extern int pushcase_range PARAMS ((tree, tree,
2521 tree (*) (tree, tree),
2523 extern void using_eh_for_cleanups PARAMS ((void));
2524 extern int stmt_loop_nest_empty PARAMS ((void));
2526 /* In fold-const.c */
2528 /* Fold constants as much as possible in an expression.
2529 Returns the simplified expression.
2530 Acts only on the top level of the expression;
2531 if the argument itself cannot be simplified, its
2532 subexpressions are not changed. */
2534 extern tree fold PARAMS ((tree));
2536 extern int force_fit_type PARAMS ((tree, int));
2537 extern int add_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
2538 unsigned HOST_WIDE_INT, HOST_WIDE_INT,
2539 unsigned HOST_WIDE_INT *,
2541 extern int neg_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
2542 unsigned HOST_WIDE_INT *,
2544 extern int mul_double PARAMS ((unsigned HOST_WIDE_INT,
2546 unsigned HOST_WIDE_INT, HOST_WIDE_INT,
2547 unsigned HOST_WIDE_INT *,
2549 extern void lshift_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
2550 HOST_WIDE_INT, unsigned int,
2551 unsigned HOST_WIDE_INT *,
2552 HOST_WIDE_INT *, int));
2553 extern void rshift_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
2554 HOST_WIDE_INT, unsigned int,
2555 unsigned HOST_WIDE_INT *,
2556 HOST_WIDE_INT *, int));
2557 extern void lrotate_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
2558 HOST_WIDE_INT, unsigned int,
2559 unsigned HOST_WIDE_INT *,
2561 extern void rrotate_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
2562 HOST_WIDE_INT, unsigned int,
2563 unsigned HOST_WIDE_INT *,
2565 extern int operand_equal_p PARAMS ((tree, tree, int));
2566 extern tree invert_truthvalue PARAMS ((tree));
2568 /* In builtins.c. Given a type, apply default promotions wrt unnamed
2569 function arguments and return the new type. Return NULL_TREE if no
2570 change. Required by any language that supports variadic arguments. */
2572 extern tree (*lang_type_promotes_to) PARAMS ((tree));
2573 extern tree fold_builtin PARAMS ((tree));
2575 /* The language front-end must define these functions. */
2577 /* Function of no arguments for initializing lexical scanning. */
2578 extern void init_lex PARAMS ((void));
2579 /* Function of no arguments for initializing the symbol table. */
2580 extern void init_decl_processing PARAMS ((void));
2582 /* Function to identify which front-end produced the output file. */
2583 extern const char *lang_identify PARAMS ((void));
2585 /* Called by report_error_function to print out function name.
2586 * Default may be overridden by language front-ends. */
2587 extern void (*print_error_function) PARAMS ((const char *));
2589 /* Function to replace the DECL_LANG_SPECIFIC field of a DECL with a copy. */
2590 extern void copy_lang_decl PARAMS ((tree));
2592 /* Function called with no arguments to parse and compile the input. */
2593 extern int yyparse PARAMS ((void));
2594 /* Functions for processing symbol declarations. */
2595 /* Function to enter a new lexical scope.
2596 Takes one argument: always zero when called from outside the front end. */
2597 extern void pushlevel PARAMS ((int));
2598 /* Function to exit a lexical scope. It returns a BINDING for that scope.
2599 Takes three arguments:
2600 KEEP -- nonzero if there were declarations in this scope.
2601 REVERSE -- reverse the order of decls before returning them.
2602 FUNCTIONBODY -- nonzero if this level is the body of a function. */
2603 extern tree poplevel PARAMS ((int, int, int));
2604 /* Set the BLOCK node for the current scope level. */
2605 extern void set_block PARAMS ((tree));
2606 /* Function to add a decl to the current scope level.
2607 Takes one argument, a decl to add.
2608 Returns that decl, or, if the same symbol is already declared, may
2609 return a different decl for that name. */
2610 extern tree pushdecl PARAMS ((tree));
2611 /* Function to return the chain of decls so far in the current scope level. */
2612 extern tree getdecls PARAMS ((void));
2613 /* Function to return the chain of structure tags in the current scope level. */
2614 extern tree gettags PARAMS ((void));
2616 extern tree build_range_type PARAMS ((tree, tree, tree));
2618 /* Called after finishing a record, union or enumeral type. */
2619 extern void rest_of_type_compilation PARAMS ((tree, int));
2622 extern void record_component_aliases PARAMS ((tree));
2623 extern HOST_WIDE_INT get_alias_set PARAMS ((tree));
2624 extern int alias_sets_conflict_p PARAMS ((HOST_WIDE_INT,
2626 extern int readonly_fields_p PARAMS ((tree));
2627 extern int objects_must_conflict_p PARAMS ((tree, tree));
2630 extern HOST_WIDE_INT lang_get_alias_set PARAMS ((tree));
2635 extern int really_constant_p PARAMS ((tree));
2636 extern void set_identifier_size PARAMS ((int));
2637 extern int int_fits_type_p PARAMS ((tree, tree));
2638 extern int tree_log2 PARAMS ((tree));
2639 extern int tree_floor_log2 PARAMS ((tree));
2640 extern void preserve_data PARAMS ((void));
2641 extern int object_permanent_p PARAMS ((tree));
2642 extern int type_precision PARAMS ((tree));
2643 extern int simple_cst_equal PARAMS ((tree, tree));
2644 extern int compare_tree_int PARAMS ((tree, unsigned int));
2645 extern int type_list_equal PARAMS ((tree, tree));
2646 extern int chain_member PARAMS ((tree, tree));
2647 extern int chain_member_purpose PARAMS ((tree, tree));
2648 extern int chain_member_value PARAMS ((tree, tree));
2649 extern tree listify PARAMS ((tree));
2650 extern tree type_hash_lookup PARAMS ((unsigned int, tree));
2651 extern void type_hash_add PARAMS ((unsigned int, tree));
2652 extern unsigned int type_hash_list PARAMS ((tree));
2653 extern int simple_cst_list_equal PARAMS ((tree, tree));
2654 extern void dump_tree_statistics PARAMS ((void));
2655 extern void print_obstack_statistics PARAMS ((const char *,
2658 extern void print_obstack_name PARAMS ((char *, FILE *,
2661 extern void expand_function_end PARAMS ((const char *, int, int));
2662 extern void expand_function_start PARAMS ((tree, int));
2664 extern int real_onep PARAMS ((tree));
2665 extern int real_twop PARAMS ((tree));
2666 extern void start_identifier_warnings PARAMS ((void));
2667 extern void gcc_obstack_init PARAMS ((struct obstack *));
2668 extern void init_obstacks PARAMS ((void));
2669 extern void build_common_tree_nodes PARAMS ((int));
2670 extern void build_common_tree_nodes_2 PARAMS ((int));
2671 extern void mark_tree_hashtable PARAMS ((void *));
2674 extern void setjmp_protect_args PARAMS ((void));
2675 extern void setjmp_protect PARAMS ((tree));
2676 extern void expand_main_function PARAMS ((void));
2677 extern void mark_varargs PARAMS ((void));
2678 extern void init_dummy_function_start PARAMS ((void));
2679 extern void expand_dummy_function_end PARAMS ((void));
2680 extern void init_function_for_compilation PARAMS ((void));
2681 extern void init_function_start PARAMS ((tree, const char *, int));
2682 extern void assign_parms PARAMS ((tree));
2683 extern void put_var_into_stack PARAMS ((tree));
2684 extern void flush_addressof PARAMS ((tree));
2685 extern void uninitialized_vars_warning PARAMS ((tree));
2686 extern void setjmp_args_warning PARAMS ((void));
2687 extern void mark_all_temps_used PARAMS ((void));
2688 extern void init_temp_slots PARAMS ((void));
2689 extern void combine_temp_slots PARAMS ((void));
2690 extern void free_temp_slots PARAMS ((void));
2691 extern void pop_temp_slots PARAMS ((void));
2692 extern void push_temp_slots PARAMS ((void));
2693 extern void preserve_temp_slots PARAMS ((struct rtx_def *));
2694 extern void preserve_rtl_expr_temps PARAMS ((tree));
2695 extern int aggregate_value_p PARAMS ((tree));
2696 extern void free_temps_for_rtl_expr PARAMS ((tree));
2697 extern void instantiate_virtual_regs PARAMS ((tree, struct rtx_def *));
2698 extern void unshare_all_rtl PARAMS ((tree, struct rtx_def *));
2699 extern int max_parm_reg_num PARAMS ((void));
2700 extern void push_function_context PARAMS ((void));
2701 extern void pop_function_context PARAMS ((void));
2702 extern void push_function_context_to PARAMS ((tree));
2703 extern void pop_function_context_from PARAMS ((tree));
2705 /* In print-rtl.c */
2707 extern void print_rtl PARAMS ((FILE *, struct rtx_def *));
2710 /* In print-tree.c */
2711 extern void debug_tree PARAMS ((tree));
2713 extern void print_node PARAMS ((FILE *, const char *, tree,
2715 extern void print_node_brief PARAMS ((FILE *, const char *, tree,
2717 extern void indent_to PARAMS ((FILE *, int));
2721 extern void emit_queue PARAMS ((void));
2722 extern int apply_args_register_offset PARAMS ((int));
2723 extern struct rtx_def *expand_builtin_return_addr
2724 PARAMS ((enum built_in_function, int, struct rtx_def *));
2725 extern void do_pending_stack_adjust PARAMS ((void));
2726 extern struct rtx_def *expand_assignment PARAMS ((tree, tree, int,
2728 extern struct rtx_def *store_expr PARAMS ((tree,
2731 extern void check_max_integer_computation_mode PARAMS ((tree));
2734 extern void start_sequence_for_rtl_expr PARAMS ((tree));
2735 extern struct rtx_def *emit_line_note_after PARAMS ((const char *, int,
2737 extern struct rtx_def *emit_line_note PARAMS ((const char *, int));
2738 extern struct rtx_def *emit_line_note_force PARAMS ((const char *, int));
2742 extern int setjmp_call_p PARAMS ((tree));
2746 extern int mark_addressable PARAMS ((tree));
2747 extern void incomplete_type_error PARAMS ((tree, tree));
2748 extern void print_lang_statistics PARAMS ((void));
2749 extern tree truthvalue_conversion PARAMS ((tree));
2750 extern void split_specs_attrs PARAMS ((tree, tree *, tree *));
2752 extern void print_lang_decl PARAMS ((FILE *, tree, int));
2753 extern void print_lang_type PARAMS ((FILE *, tree, int));
2754 extern void print_lang_identifier PARAMS ((FILE *, tree, int));
2756 extern int global_bindings_p PARAMS ((void));
2757 extern void insert_block PARAMS ((tree));
2759 /* In integrate.c */
2760 extern void save_for_inline PARAMS ((tree));
2761 extern void set_decl_abstract_flags PARAMS ((tree, int));
2762 extern void output_inline_function PARAMS ((tree));
2763 extern void set_decl_origin_self PARAMS ((tree));
2766 extern void set_yydebug PARAMS ((int));
2768 /* In stor-layout.c */
2769 extern void fixup_signed_type PARAMS ((tree));
2772 extern void make_decl_rtl PARAMS ((tree, const char *));
2773 extern void make_decl_one_only PARAMS ((tree));
2774 extern int supports_one_only PARAMS ((void));
2775 extern void variable_section PARAMS ((tree, int));
2777 /* In fold-const.c */
2778 extern int div_and_round_double PARAMS ((enum tree_code, int,
2779 unsigned HOST_WIDE_INT,
2781 unsigned HOST_WIDE_INT,
2783 unsigned HOST_WIDE_INT *,
2785 unsigned HOST_WIDE_INT *,
2789 extern void emit_nop PARAMS ((void));
2790 extern void expand_computed_goto PARAMS ((tree));
2791 extern struct rtx_def *label_rtx PARAMS ((tree));
2792 extern void expand_asm_operands PARAMS ((tree, tree, tree, tree, int,
2793 const char *, int));
2794 extern int any_pending_cleanups PARAMS ((int));
2795 extern void init_stmt PARAMS ((void));
2796 extern void init_stmt_for_function PARAMS ((void));
2797 extern int drop_through_at_end_p PARAMS ((void));
2798 extern void expand_start_target_temps PARAMS ((void));
2799 extern void expand_end_target_temps PARAMS ((void));
2800 extern void expand_elseif PARAMS ((tree));
2801 extern void save_stack_pointer PARAMS ((void));
2802 extern void expand_decl PARAMS ((tree));
2803 extern int expand_decl_cleanup PARAMS ((tree, tree));
2804 extern void expand_anon_union_decl PARAMS ((tree, tree, tree));
2805 extern void move_cleanups_up PARAMS ((void));
2806 extern void expand_start_case_dummy PARAMS ((void));
2807 extern void expand_end_case_dummy PARAMS ((void));
2808 extern tree case_index_expr_type PARAMS ((void));
2809 extern HOST_WIDE_INT all_cases_count PARAMS ((tree, int *));
2810 extern void check_for_full_enumeration_handling PARAMS ((tree));
2811 extern void declare_nonlocal_label PARAMS ((tree));
2813 extern void lang_print_xnode PARAMS ((FILE *, tree, int));
2817 /* If KIND=='I', return a suitable global initializer (constructor) name.
2818 If KIND=='D', return a suitable global clean-up (destructor) name. */
2819 extern tree get_file_function_name PARAMS ((int));
2821 /* Interface of the DWARF2 unwind info support. */
2823 /* Decide whether we want to emit frame unwind information for the current
2824 translation unit. */
2826 extern int dwarf2out_do_frame PARAMS ((void));
2828 /* Generate a new label for the CFI info to refer to. */
2830 extern char *dwarf2out_cfi_label PARAMS ((void));
2832 /* Entry point to update the canonical frame address (CFA). */
2834 extern void dwarf2out_def_cfa PARAMS ((const char *, unsigned, long));
2836 /* Add the CFI for saving a register window. */
2838 extern void dwarf2out_window_save PARAMS ((const char *));
2840 /* Add a CFI to update the running total of the size of arguments pushed
2843 extern void dwarf2out_args_size PARAMS ((const char *, long));
2845 /* Entry point for saving a register to the stack. */
2847 extern void dwarf2out_reg_save PARAMS ((const char *, unsigned, long));
2849 /* Entry point for saving the return address in the stack. */
2851 extern void dwarf2out_return_save PARAMS ((const char *, long));
2853 /* Entry point for saving the return address in a register. */
2855 extern void dwarf2out_return_reg PARAMS ((const char *, unsigned));
2857 /* Output a marker (i.e. a label) for the beginning of a function, before
2860 extern void dwarf2out_begin_prologue PARAMS ((void));
2862 /* Output a marker (i.e. a label) for the absolute end of the generated
2863 code for a function definition. */
2865 extern void dwarf2out_end_epilogue PARAMS ((void));
2867 /* Redefine abort to report an internal error w/o coredump, and
2868 reporting the location of the error in the source file. This logic
2869 is duplicated in rtl.h and tree.h because every file that needs the
2870 special abort includes one or both. toplev.h gets too few files,
2871 system.h gets too many. */
2873 extern void fancy_abort PARAMS ((const char *, int, const char *))
2875 #define abort() fancy_abort (__FILE__, __LINE__, __FUNCTION__)