/* This file contains the definitions and documentation for the
tree codes used in the GNU C compiler.
- Copyright (C) 1987, 1988, 1993 Free Software Foundation, Inc.
+ Copyright (C) 1987, 1988, 1993, 1995, 1997, 1998, 2000 Free Software Foundation, Inc.
This file is part of GNU CC.
You should have received a copy of the GNU General Public License
along with GNU CC; see the file COPYING. If not, write to
-the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+the Free Software Foundation, 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
/* The third argument can be:
- "x" for an exceptional code (fits no category).
- "t" for a type object code.
- "b" for a lexical block.
- "c" for codes for constants.
- "d" for codes for declarations (also serving as variable refs).
- "r" for codes for references to storage.
- "<" for codes for comparison expressions.
- "1" for codes for unary arithmetic expressions.
- "2" for codes for binary arithmetic expressions.
- "s" for codes for expressions with inherent side effects.
- "e" for codes for other kinds of expressions. */
+ 'x' for an exceptional code (fits no category).
+ 't' for a type object code.
+ 'b' for a lexical block.
+ 'c' for codes for constants.
+ 'd' for codes for declarations (also serving as variable refs).
+ 'r' for codes for references to storage.
+ '<' for codes for comparison expressions.
+ '1' for codes for unary arithmetic expressions.
+ '2' for codes for binary arithmetic expressions.
+ 's' for codes for expressions with inherent side effects.
+ 'e' for codes for other kinds of expressions. */
/* For `r', `e', `<', `1', `2', `s' and `x' nodes,
the 4th element is the number of argument slots to allocate.
by later parsing activities, to avoid multiple error messages
for one error.
No fields in these nodes are used except the TREE_CODE. */
-DEFTREECODE (ERROR_MARK, "error_mark", "x", 0)
+DEFTREECODE (ERROR_MARK, "error_mark", 'x', 0)
/* Used to represent a name (such as, in the DECL_NAME of a decl node).
Internally it looks like a STRING_CST node.
There is only one IDENTIFIER_NODE ever made for any particular name.
Use `get_identifier' to get it (or create it, the first time). */
-DEFTREECODE (IDENTIFIER_NODE, "identifier_node", "x", -1)
+DEFTREECODE (IDENTIFIER_NODE, "identifier_node", 'x', -1)
/* Used to hold information to identify an operator (or combination
of two operators) considered as a `noun' rather than a `verb'.
The first operand is encoded in the TREE_TYPE field. */
-DEFTREECODE (OP_IDENTIFIER, "op_identifier", "x", 2)
+DEFTREECODE (OP_IDENTIFIER, "op_identifier", 'x', 2)
/* Has the TREE_VALUE and TREE_PURPOSE fields. */
/* These nodes are made into lists by chaining through the
TREE_CHAIN field. The elements of the list live in the
TREE_VALUE fields, while TREE_PURPOSE fields are occasionally
used as well to get the effect of Lisp association lists. */
-DEFTREECODE (TREE_LIST, "tree_list", "x", 2)
+DEFTREECODE (TREE_LIST, "tree_list", 'x', 2)
/* These nodes contain an array of tree nodes. */
-DEFTREECODE (TREE_VEC, "tree_vec", "x", 2)
+DEFTREECODE (TREE_VEC, "tree_vec", 'x', 2)
/* A symbol binding block. These are arranged in a tree,
where the BLOCK_SUBBLOCKS field contains a chain of subblocks
outermost scope of a particular inlining of a function).
BLOCK_ABSTRACT is non-zero if the block represents an abstract
instance of a block (i.e. one which is nested within an abstract
- instance of a inline function. */
-DEFTREECODE (BLOCK, "block", "b", 0)
+ instance of an inline function).
+ TREE_ASM_WRITTEN is non-zero if the block was actually referenced
+ in the generated assembly. */
+DEFTREECODE (BLOCK, "block", 'b', 0)
\f
/* Each data type is represented by a tree node whose code is one of
the following: */
points to the start of the chain.
The TYPE_NONCOPIED_PARTS field is a list specifying which parts
of an object of this type should *not* be copied by assignment.
- The TREE_PURPOSE of each element is the offset of the part
- and the TREE_VALUE is the size in bits of the part.
+ The TREE_VALUE of each is a FIELD_DECL that should not be
+ copied. The TREE_PURPOSE is an initial value for that field when
+ an object of this type is initialized via an INIT_EXPR. It may
+ be NULL if no special value is required. Even the things in this
+ list are copied if the right-hand side of an assignment is known
+ to be a complete object (rather than being, perhaps, a subobject
+ of some other object.) The determination of what constitutes a
+ complete object is done by fixed_type_p.
The TYPE_NAME field contains info on the name used in the program
for this type (for GDB symbol table output). It is either a
TYPE_DECL node, for types that are typedefs, or an IDENTIFIER_NODE
ENUMERAL_TYPE, RECORD_TYPE, UNION_TYPE, and QUAL_UNION_TYPE nodes;
see below. */
-DEFTREECODE (VOID_TYPE, "void_type", "t", 0) /* The void type in C */
+DEFTREECODE (VOID_TYPE, "void_type", 't', 0) /* The void type in C */
/* Integer types in all languages, including char in C.
Also used for sub-ranges of other discrete types.
of this will point at the supertype (another INTEGER_TYPE,
or an ENUMERAL_TYPE, CHAR_TYPE, or BOOLEAN_TYPE).
Otherwise, the TREE_TYPE is zero. */
-DEFTREECODE (INTEGER_TYPE, "integer_type", "t", 0)
+DEFTREECODE (INTEGER_TYPE, "integer_type", 't', 0)
/* C's float and double. Different floating types are distinguished
by machine mode and by the TYPE_SIZE and the TYPE_PRECISION. */
-DEFTREECODE (REAL_TYPE, "real_type", "t", 0)
+DEFTREECODE (REAL_TYPE, "real_type", 't', 0)
/* Complex number types. The TREE_TYPE field is the data type
of the real and imaginary parts. */
-DEFTREECODE (COMPLEX_TYPE, "complex_type", "t", 0)
+DEFTREECODE (COMPLEX_TYPE, "complex_type", 't', 0)
+
+/* Vector types. The TREE_TYPE field is the data type of the vector
+ elements. */
+DEFTREECODE (VECTOR_TYPE, "vector_type", 't', 0)
/* C enums. The type node looks just like an INTEGER_TYPE node.
The symbols for the values of the enum type are defined by
fields are filled in.
RECORD_TYPE, UNION_TYPE, and QUAL_UNION_TYPE forward refs are
treated similarly. */
-DEFTREECODE (ENUMERAL_TYPE, "enumeral_type", "t", 0)
+DEFTREECODE (ENUMERAL_TYPE, "enumeral_type", 't', 0)
/* Pascal's boolean type (true or false are the only values);
no special fields needed. */
-DEFTREECODE (BOOLEAN_TYPE, "boolean_type", "t", 0)
+DEFTREECODE (BOOLEAN_TYPE, "boolean_type", 't', 0)
/* CHAR in Pascal; not used in C.
No special fields needed. */
-DEFTREECODE (CHAR_TYPE, "char_type", "t", 0)
+DEFTREECODE (CHAR_TYPE, "char_type", 't', 0)
/* All pointer-to-x types have code POINTER_TYPE.
The TREE_TYPE points to the node for the type pointed to. */
-DEFTREECODE (POINTER_TYPE, "pointer_type", "t", 0)
+DEFTREECODE (POINTER_TYPE, "pointer_type", 't', 0)
/* An offset is a pointer relative to an object.
The TREE_TYPE field is the type of the object at the offset.
The TYPE_OFFSET_BASETYPE points to the node for the type of object
that the offset is relative to. */
-DEFTREECODE (OFFSET_TYPE, "offset_type", "t", 0)
+DEFTREECODE (OFFSET_TYPE, "offset_type", 't', 0)
/* A reference is like a pointer except that it is coerced
automatically to the value it points to. Used in C++. */
-DEFTREECODE (REFERENCE_TYPE, "reference_type", "t", 0)
+DEFTREECODE (REFERENCE_TYPE, "reference_type", 't', 0)
/* METHOD_TYPE is the type of a function which takes an extra first
argument for "self", which is not present in the declared argument list.
The TREE_TYPE is the return type of the method. The TYPE_METHOD_BASETYPE
is the type of "self". TYPE_ARG_TYPES is the real argument list, which
includes the hidden argument for "self". */
-DEFTREECODE (METHOD_TYPE, "method_type", "t", 0)
+DEFTREECODE (METHOD_TYPE, "method_type", 't', 0)
/* Used for Pascal; details not determined right now. */
-DEFTREECODE (FILE_TYPE, "file_type", "t", 0)
+DEFTREECODE (FILE_TYPE, "file_type", 't', 0)
/* Types of arrays. Special fields:
TREE_TYPE Type of an array element.
TYPE_SEP Expression for units from one elt to the next.
TYPE_SEP_UNIT Number of bits in a unit for previous.
The field TYPE_POINTER_TO (TREE_TYPE (array_type)) is always nonzero
- and holds the type to coerce a value of that array type to in C. */
+ and holds the type to coerce a value of that array type to in C.
+ TYPE_STRING_FLAG indicates a string (in contrast to an array of chars)
+ in languages (such as Chill) that make a distinction. */
/* Array types in C or Pascal */
-DEFTREECODE (ARRAY_TYPE, "array_type", "t", 0)
+DEFTREECODE (ARRAY_TYPE, "array_type", 't', 0)
/* Types of sets for Pascal. Special fields are the same as
- in an array type. The target type is always a boolean type. */
-DEFTREECODE (SET_TYPE, "set_type", "t", 0)
-
-/* Not known whether Pascal really needs this
- or what it should contain. */
-DEFTREECODE (STRING_TYPE, "string_type", "t", 0)
+ in an array type. The target type is always a boolean type.
+ Used for both bitstrings and powersets in Chill;
+ TYPE_STRING_FLAG indicates a bitstring. */
+DEFTREECODE (SET_TYPE, "set_type", 't', 0)
/* Struct in C, or record in Pascal. */
/* Special fields:
- TYPE_FIELDS chain of FIELD_DECLs for the fields of the struct.
+ TYPE_FIELDS chain of FIELD_DECLs for the fields of the struct,
+ and VAR_DECLs, TYPE_DECLs and CONST_DECLs for record-scope variables,
+ types and enumerators.
A few may need to be added for Pascal. */
/* See the comment above, before ENUMERAL_TYPE, for how
forward references to struct tags are handled in C. */
-DEFTREECODE (RECORD_TYPE, "record_type", "t", 0)
+DEFTREECODE (RECORD_TYPE, "record_type", 't', 0)
/* Union in C. Like a struct, except that the offsets of the fields
will all be zero. */
/* See the comment above, before ENUMERAL_TYPE, for how
forward references to union tags are handled in C. */
-DEFTREECODE (UNION_TYPE, "union_type", "t", 0) /* C union type */
+DEFTREECODE (UNION_TYPE, "union_type", 't', 0) /* C union type */
/* Similar to UNION_TYPE, except that the expressions in DECL_QUALIFIER
in each FIELD_DECL determine what the union contains. The first
field whose DECL_QUALIFIER expression is true is deemed to occupy
the union. */
-DEFTREECODE (QUAL_UNION_TYPE, "qual_union_type", "t", 0)
+DEFTREECODE (QUAL_UNION_TYPE, "qual_union_type", 't', 0)
/* Type of functions. Special fields:
TREE_TYPE type of value returned.
this list is made of TREE_LIST nodes.
Types of "Procedures" in languages where they are different from functions
have code FUNCTION_TYPE also, but then TREE_TYPE is zero or void type. */
-DEFTREECODE (FUNCTION_TYPE, "function_type", "t", 0)
+DEFTREECODE (FUNCTION_TYPE, "function_type", 't', 0)
/* This is a language-specific kind of type.
Its meaning is defined by the language front end.
layout_type does not know how to lay this out,
so the front-end must do so manually. */
-DEFTREECODE (LANG_TYPE, "lang_type", "t", 0)
+DEFTREECODE (LANG_TYPE, "lang_type", 't', 0)
\f
/* Expressions */
Note: constants of type char in Pascal are INTEGER_CST,
and so are pointer constants such as nil in Pascal or NULL in C.
`(int *) 1' in C also results in an INTEGER_CST. */
-DEFTREECODE (INTEGER_CST, "integer_cst", "c", 2)
+DEFTREECODE (INTEGER_CST, "integer_cst", 'c', 2)
/* Contents are in TREE_REAL_CST field. Also there is TREE_CST_RTL. */
-DEFTREECODE (REAL_CST, "real_cst", "c", 3)
+DEFTREECODE (REAL_CST, "real_cst", 'c', 3)
/* Contents are in TREE_REALPART and TREE_IMAGPART fields,
whose contents are other constant nodes.
Also there is TREE_CST_RTL. */
-DEFTREECODE (COMPLEX_CST, "complex_cst", "c", 3)
+DEFTREECODE (COMPLEX_CST, "complex_cst", 'c', 3)
/* Contents are TREE_STRING_LENGTH and TREE_STRING_POINTER fields.
Also there is TREE_CST_RTL. */
-DEFTREECODE (STRING_CST, "string_cst", "c", 3)
+DEFTREECODE (STRING_CST, "string_cst", 'c', 3)
/* Declarations. All references to names are represented as ..._DECL nodes.
The decls in one binding context are chained through the TREE_CHAIN field.
this declaration has its scope. For FIELD_DECLs, this is the
RECORD_TYPE, UNION_TYPE, or QUAL_UNION_TYPE node that the field
is a member of. For VAR_DECL, PARM_DECL, FUNCTION_DECL, LABEL_DECL,
- and CONST_DECL nodes, this points to the FUNCTION_DECL for the
- containing function, or else yields NULL_TREE if the given decl
- has "file scope".
+ and CONST_DECL nodes, this points to either the FUNCTION_DECL for the
+ containing function, the RECORD_TYPE or UNION_TYPE for the containing
+ type, or NULL_TREE if the given decl has "file scope".
DECL_ABSTRACT_ORIGIN, if non-NULL, points to the original (abstract)
..._DECL node of which this decl is an (inlined or template expanded)
instance.
DECL_RESULT holds a RESULT_DECL node for the value of a function,
or it is 0 for a function that returns no value.
(C functions returning void have zero here.)
- DECL_RESULT_TYPE holds the type in which the result is actually
- returned. This is usually the same as the type of DECL_RESULT,
- but (1) it may be a wider integer type and
- (2) it remains valid, for the sake of inlining, even after the
- function's compilation is done.
+ The TREE_TYPE field is the type in which the result is actually
+ returned. This is usually the same as the return type of the
+ FUNCTION_DECL, but it may be a wider integer type because of
+ promotion.
DECL_FUNCTION_CODE is a code number that is nonzero for
built-in functions. Its value is an enum built_in_function
that says which built-in function it is.
of a decl (i.e. one which is nested within an abstract instance of a
inline function. */
-DEFTREECODE (FUNCTION_DECL, "function_decl", "d", 0)
-DEFTREECODE (LABEL_DECL, "label_decl", "d", 0)
-DEFTREECODE (CONST_DECL, "const_decl", "d", 0)
-DEFTREECODE (TYPE_DECL, "type_decl", "d", 0)
-DEFTREECODE (VAR_DECL, "var_decl", "d", 0)
-DEFTREECODE (PARM_DECL, "parm_decl", "d", 0)
-DEFTREECODE (RESULT_DECL, "result_decl", "d", 0)
-DEFTREECODE (FIELD_DECL, "field_decl", "d", 0)
+DEFTREECODE (FUNCTION_DECL, "function_decl", 'd', 0)
+DEFTREECODE (LABEL_DECL, "label_decl", 'd', 0)
+DEFTREECODE (CONST_DECL, "const_decl", 'd', 0)
+DEFTREECODE (TYPE_DECL, "type_decl", 'd', 0)
+DEFTREECODE (VAR_DECL, "var_decl", 'd', 0)
+DEFTREECODE (PARM_DECL, "parm_decl", 'd', 0)
+DEFTREECODE (RESULT_DECL, "result_decl", 'd', 0)
+DEFTREECODE (FIELD_DECL, "field_decl", 'd', 0)
+
+/* A namespace declaration. Namespaces appear in DECL_CONTEXT of other
+ _DECLs, providing a hierarchy of names. */
+DEFTREECODE (NAMESPACE_DECL, "namespace_decl", 'd', 0)
\f
/* References to storage. */
/* Value is structure or union component.
Operand 0 is the structure or union (an expression);
operand 1 is the field (a node of type FIELD_DECL). */
-DEFTREECODE (COMPONENT_REF, "component_ref", "r", 2)
+DEFTREECODE (COMPONENT_REF, "component_ref", 'r', 2)
/* Reference to a group of bits within an object. Similar to COMPONENT_REF
except the position is given explicitly rather than via a FIELD_DECL.
operand 2 is a tree giving the position of the first referenced bit.
The field can be either a signed or unsigned field;
TREE_UNSIGNED says which. */
-DEFTREECODE (BIT_FIELD_REF, "bit_field_ref", "r", 3)
+DEFTREECODE (BIT_FIELD_REF, "bit_field_ref", 'r', 3)
/* C unary `*' or Pascal `^'. One operand, an expression for a pointer. */
-DEFTREECODE (INDIRECT_REF, "indirect_ref", "r", 1)
-
-/* Reference to the contents of an offset
- (a value whose type is an OFFSET_TYPE).
- Operand 0 is the object within which the offset is taken.
- Operand 1 is the offset. */
-DEFTREECODE (OFFSET_REF, "offset_ref", "r", 2)
+DEFTREECODE (INDIRECT_REF, "indirect_ref", 'r', 1)
/* Pascal `^` on a file. One operand, an expression for the file. */
-DEFTREECODE (BUFFER_REF, "buffer_ref", "r", 1)
+DEFTREECODE (BUFFER_REF, "buffer_ref", 'r', 1)
/* Array indexing in languages other than C.
- Operand 0 is the array; operand 1 is a list of indices
- stored as a chain of TREE_LIST nodes. */
-DEFTREECODE (ARRAY_REF, "array_ref", "r", 2)
+ Operand 0 is the array; operand 1 is a (single) array index. */
+DEFTREECODE (ARRAY_REF, "array_ref", 'r', 2)
/* Constructor: return an aggregate value made from specified components.
In C, this is used only for structure and array initializers.
+ Also used for SET_TYPE in Chill (and potentially Pascal).
The first "operand" is really a pointer to the RTL,
for constant constructors only.
The second operand is a list of component values
- made out of a chain of TREE_LIST nodes. */
-DEFTREECODE (CONSTRUCTOR, "constructor", "e", 2)
+ made out of a chain of TREE_LIST nodes.
+
+ For ARRAY_TYPE:
+ The TREE_PURPOSE of each node is the corresponding index.
+ If the TREE_PURPOSE is a RANGE_EXPR, it is a short-hand for many nodes,
+ one for each index in the range. (If the corresponding TREE_VALUE
+ has side-effects, they are evaluated once for each element. Wrap the
+ value in a SAVE_EXPR if you want to evaluate side effects only once.)
-/* The expression types are mostly straightforward,
- with the fourth argument of DEFTREECODE saying
- how many operands there are.
- Unless otherwise specified, the operands are expressions. */
+ For RECORD_TYPE, UNION_TYPE, or QUAL_UNION_TYPE:
+ The TREE_PURPOSE of each node is a FIELD_DECL.
+
+ For SET_TYPE:
+ The TREE_VALUE specifies a value (index) in the set that is true.
+ If TREE_PURPOSE is non-NULL, it specifies the lower limit of a
+ range of true values. Elements not listed are false (not in the set). */
+DEFTREECODE (CONSTRUCTOR, "constructor", 'e', 2)
+
+/* The expression types are mostly straightforward, with the fourth argument
+ of DEFTREECODE saying how many operands there are.
+ Unless otherwise specified, the operands are expressions and the
+ types of all the operands and the expression must all be the same. */
/* Contains two expressions to compute, one followed by the other.
- the first value is ignored. The second one's value is used. */
-DEFTREECODE (COMPOUND_EXPR, "compound_expr", "e", 2)
+ the first value is ignored. The second one's value is used. The
+ type of the first expression need not agree with the other types. */
+DEFTREECODE (COMPOUND_EXPR, "compound_expr", 'e', 2)
/* Assignment expression. Operand 0 is the what to set; 1, the new value. */
-DEFTREECODE (MODIFY_EXPR, "modify_expr", "e", 2)
+DEFTREECODE (MODIFY_EXPR, "modify_expr", 'e', 2)
/* Initialization expression. Operand 0 is the variable to initialize;
Operand 1 is the initializer. */
-DEFTREECODE (INIT_EXPR, "init_expr", "e", 2)
+DEFTREECODE (INIT_EXPR, "init_expr", 'e', 2)
/* For TARGET_EXPR, operand 0 is the target of an initialization,
operand 1 is the initializer for the target,
- and operand 2 is the cleanup for this node, if any. */
-DEFTREECODE (TARGET_EXPR, "target_expr", "e", 3)
+ and operand 2 is the cleanup for this node, if any.
+ and operand 3 is the saved initializer after this node has been
+ expanded once, this is so we can re-expand the tree later. */
+DEFTREECODE (TARGET_EXPR, "target_expr", 'e', 4)
/* Conditional expression ( ... ? ... : ... in C).
Operand 0 is the condition.
Operand 1 is the then-value.
- Operand 2 is the else-value. */
-DEFTREECODE (COND_EXPR, "cond_expr", "e", 3)
+ Operand 2 is the else-value.
+ Operand 0 may be of any type, but the types of operands 1 and 2
+ must be the same and the same as the type of this expression. */
+DEFTREECODE (COND_EXPR, "cond_expr", 'e', 3)
/* Declare local variables, including making RTL and allocating space.
Operand 0 is a chain of VAR_DECL nodes for the variables.
In order for the BIND_EXPR to be known at all, the code that creates it
must also install it as a subblock in the tree of BLOCK
nodes for the function. */
-DEFTREECODE (BIND_EXPR, "bind_expr", "e", 3)
+DEFTREECODE (BIND_EXPR, "bind_expr", 'e', 3)
/* Function call. Operand 0 is the function.
Operand 1 is the argument list, a list of expressions
- made out of a chain of TREE_LIST nodes.
- There is no operand 2. That slot is used for the
- CALL_EXPR_RTL macro (see preexpand_calls). */
-DEFTREECODE (CALL_EXPR, "call_expr", "e", 3)
+ made out of a chain of TREE_LIST nodes. */
+DEFTREECODE (CALL_EXPR, "call_expr", 'e', 2)
/* Call a method. Operand 0 is the method, whose type is a METHOD_TYPE.
Operand 1 is the expression for "self".
Operand 2 is the list of explicit arguments. */
-DEFTREECODE (METHOD_CALL_EXPR, "method_call_expr", "e", 4)
+DEFTREECODE (METHOD_CALL_EXPR, "method_call_expr", 'e', 4)
/* Specify a value to compute along with its corresponding cleanup.
Operand 0 argument is an expression whose value needs a cleanup.
Operand 2 is the cleanup expression for the object.
The RTL_EXPR is used in this expression, which is how the expression
manages to act on the proper value.
- The cleanup is executed when the value is no longer needed,
- which is not at precisely the same time that this value is computed. */
-DEFTREECODE (WITH_CLEANUP_EXPR, "with_cleanup_expr", "e", 3)
+ The cleanup is executed by the first enclosing CLEANUP_POINT_EXPR, if
+ it exists, otherwise it is the responsibility of the caller to manually
+ call expand_start_target_temps/expand_end_target_temps, as needed.
+
+ This differs from TRY_CATCH_EXPR in that operand 2 is always
+ evaluated when an exception isn't thrown when cleanups are run. */
+DEFTREECODE (WITH_CLEANUP_EXPR, "with_cleanup_expr", 'e', 3)
+
+/* Specify a cleanup point.
+ Operand 0 is an expression that may have cleanups. If it does, those
+ cleanups are executed after the expression is expanded.
+
+ Note that if the expression is a reference to storage, it is forced out
+ of memory before the cleanups are run. This is necessary to handle
+ cases where the cleanups modify the storage referenced; in the
+ expression 't.i', if 't' is a struct with an integer member 'i' and a
+ cleanup which modifies 'i', the value of the expression depends on
+ whether the cleanup is run before or after 't.i' is evaluated. When
+ expand_expr is run on 't.i', it returns a MEM. This is not good enough;
+ the value of 't.i' must be forced out of memory.
+
+ As a consequence, the operand of a CLEANUP_POINT_EXPR must not have
+ BLKmode, because it will not be forced out of memory. */
+DEFTREECODE (CLEANUP_POINT_EXPR, "cleanup_point_expr", 'e', 1)
/* The following two codes are used in languages that have types where
- the position and/or sizes of fields vary from object to object of the
- same type, i.e., where some other field in the object contains a value
- that is used in the computation of another field's offset or size.
-
- For example, a record type with a discriminant in Ada is such a type.
- This mechanism is also used to create "fat pointers" for unconstrained
- array types in Ada; the fat pointer is a structure one of whose fields is
- a pointer to the actual array type and the other field is a pointer to a
- template, which is a structure containing the bounds of the array. The
- bounds in the type pointed to by the first field in the fat pointer refer
- to the values in the template.
-
- These "self-references" are doing using a PLACEHOLDER_EXPR. This is a
- node that will later be replaced with the object being referenced. Its type
- is that of the object and selects which object to use from a chain of
- references (see below).
-
- When we wish to evaluate a size or offset, we check it is contains a
- placeholder. If it does, we construct a WITH_RECORD_EXPR that contains
- both the expression we wish to evaluate and an expression within which the
- object may be found. The latter expression is the object itself in
- the simple case of an Ada record with discriminant, but it can be the
- array in the case of an unconstrained array.
-
- In the latter case, we need the fat pointer, because the bounds of the
- array can only be accessed from it. However, we rely here on the fact that
- the expression for the array contains the dereference of the fat pointer
- that obtained the array pointer.
+ some field in an object of the type contains a value that is used in
+ the computation of another field's offset or size and/or the size of
+ the type. The positions and/or sizes of fields can vary from object
+ to object of the same type.
+
+ Record types with discriminants in Ada or schema types in Pascal are
+ examples of such types. This mechanism is also used to create "fat
+ pointers" for unconstrained array types in Ada; the fat pointer is a
+ structure one of whose fields is a pointer to the actual array type
+ and the other field is a pointer to a template, which is a structure
+ containing the bounds of the array. The bounds in the type pointed
+ to by the first field in the fat pointer refer to the values in the
+ template.
+
+ When you wish to construct such a type you need "self-references"
+ that allow you to reference the object having this type from the
+ TYPE node, i.e. without having a variable instantiating this type.
+
+ Such a "self-references" is done using a PLACEHOLDER_EXPR. This is
+ a node that will later be replaced with the object being referenced.
+ Its type is that of the object and selects which object to use from
+ a chain of references (see below). No other slots are used in the
+ PLACEHOLDER_EXPR.
+
+ For example, if your type FOO is a RECORD_TYPE with a field BAR,
+ and you need the value of <variable>.BAR to calculate TYPE_SIZE
+ (FOO), just substitute <variable> above with a PLACEHOLDER_EXPR
+ what contains both the expression we wish to
+ evaluate and an expression within which the object may be found.
+ The latter expression is the object itself in the simple case of an
+ Ada record with discriminant, but it can be the array in the case of
+ an unconstrained array.
+
+ In the latter case, we need the fat pointer, because the bounds of
+ the array can only be accessed from it. However, we rely here on the
+ fact that the expression for the array contains the dereference of
+ the fat pointer that obtained the array pointer.
Accordingly, when looking for the object to substitute in place of
a PLACEHOLDER_EXPR, we look down the first operand of the expression
- passed as the second operand to WITH_RECORD_EXPR until we find something
- of the desired type or reach a constant. */
+ passed as the second operand to WITH_RECORD_EXPR until we find
+ something of the desired type or reach a constant. */
/* Denotes a record to later be supplied with a WITH_RECORD_EXPR when
evaluating this expression. The type of this expression is used to
find the record to replace it. */
-DEFTREECODE (PLACEHOLDER_EXPR, "placeholder_expr", "x", 0)
+DEFTREECODE (PLACEHOLDER_EXPR, "placeholder_expr", 'x', 0)
/* Provide an expression that references a record to be used in place
of a PLACEHOLDER_EXPR. The record to be used is the record within
operand 1 that has the same type as the PLACEHOLDER_EXPR in
operand 0. */
-DEFTREECODE (WITH_RECORD_EXPR, "with_record_expr", "e", 2)
+DEFTREECODE (WITH_RECORD_EXPR, "with_record_expr", 'e', 2)
-/* Simple arithmetic. Operands must have the same machine mode
- and the value shares that mode. */
-DEFTREECODE (PLUS_EXPR, "plus_expr", "2", 2)
-DEFTREECODE (MINUS_EXPR, "minus_expr", "2", 2)
-DEFTREECODE (MULT_EXPR, "mult_expr", "2", 2)
+/* Simple arithmetic. */
+DEFTREECODE (PLUS_EXPR, "plus_expr", '2', 2)
+DEFTREECODE (MINUS_EXPR, "minus_expr", '2', 2)
+DEFTREECODE (MULT_EXPR, "mult_expr", '2', 2)
/* Division for integer result that rounds the quotient toward zero. */
-/* Operands must have the same machine mode.
- In principle they may be real, but that is not currently supported.
- The result is always fixed point, and it has the same type as the
- operands if they are fixed point. */
-DEFTREECODE (TRUNC_DIV_EXPR, "trunc_div_expr", "2", 2)
+DEFTREECODE (TRUNC_DIV_EXPR, "trunc_div_expr", '2', 2)
/* Division for integer result that rounds the quotient toward infinity. */
-DEFTREECODE (CEIL_DIV_EXPR, "ceil_div_expr", "2", 2)
+DEFTREECODE (CEIL_DIV_EXPR, "ceil_div_expr", '2', 2)
/* Division for integer result that rounds toward minus infinity. */
-DEFTREECODE (FLOOR_DIV_EXPR, "floor_div_expr", "2", 2)
+DEFTREECODE (FLOOR_DIV_EXPR, "floor_div_expr", '2', 2)
/* Division for integer result that rounds toward nearest integer. */
-DEFTREECODE (ROUND_DIV_EXPR, "round_div_expr", "2", 2)
+DEFTREECODE (ROUND_DIV_EXPR, "round_div_expr", '2', 2)
/* Four kinds of remainder that go with the four kinds of division. */
-DEFTREECODE (TRUNC_MOD_EXPR, "trunc_mod_expr", "2", 2)
-DEFTREECODE (CEIL_MOD_EXPR, "ceil_mod_expr", "2", 2)
-DEFTREECODE (FLOOR_MOD_EXPR, "floor_mod_expr", "2", 2)
-DEFTREECODE (ROUND_MOD_EXPR, "round_mod_expr", "2", 2)
+DEFTREECODE (TRUNC_MOD_EXPR, "trunc_mod_expr", '2', 2)
+DEFTREECODE (CEIL_MOD_EXPR, "ceil_mod_expr", '2', 2)
+DEFTREECODE (FLOOR_MOD_EXPR, "floor_mod_expr", '2', 2)
+DEFTREECODE (ROUND_MOD_EXPR, "round_mod_expr", '2', 2)
-/* Division for real result. The two operands must have the same type.
- In principle they could be integers, but currently only real
- operands are supported. The result must have the same type
- as the operands. */
-DEFTREECODE (RDIV_EXPR, "rdiv_expr", "2", 2)
+/* Division for real result. */
+DEFTREECODE (RDIV_EXPR, "rdiv_expr", '2', 2)
/* Division which is not supposed to need rounding.
Used for pointer subtraction in C. */
-DEFTREECODE (EXACT_DIV_EXPR, "exact_div_expr", "2", 2)
+DEFTREECODE (EXACT_DIV_EXPR, "exact_div_expr", '2', 2)
/* Conversion of real to fixed point: four ways to round,
like the four ways to divide.
CONVERT_EXPR can also be used to convert a real to an integer,
and that is what is used in languages that do not have ways of
specifying which of these is wanted. Maybe these are not needed. */
-DEFTREECODE (FIX_TRUNC_EXPR, "fix_trunc_expr", "1", 1)
-DEFTREECODE (FIX_CEIL_EXPR, "fix_ceil_expr", "1", 1)
-DEFTREECODE (FIX_FLOOR_EXPR, "fix_floor_expr", "1", 1)
-DEFTREECODE (FIX_ROUND_EXPR, "fix_round_expr", "1", 1)
+DEFTREECODE (FIX_TRUNC_EXPR, "fix_trunc_expr", '1', 1)
+DEFTREECODE (FIX_CEIL_EXPR, "fix_ceil_expr", '1', 1)
+DEFTREECODE (FIX_FLOOR_EXPR, "fix_floor_expr", '1', 1)
+DEFTREECODE (FIX_ROUND_EXPR, "fix_round_expr", '1', 1)
/* Conversion of an integer to a real. */
-DEFTREECODE (FLOAT_EXPR, "float_expr", "1", 1)
+DEFTREECODE (FLOAT_EXPR, "float_expr", '1', 1)
/* Exponentiation. Operands may have any types;
constraints on value type are not known yet. */
-DEFTREECODE (EXPON_EXPR, "expon_expr", "2", 2)
+DEFTREECODE (EXPON_EXPR, "expon_expr", '2', 2)
-/* Unary negation. Value has same type as operand. */
-DEFTREECODE (NEGATE_EXPR, "negate_expr", "1", 1)
+/* Unary negation. */
+DEFTREECODE (NEGATE_EXPR, "negate_expr", '1', 1)
-DEFTREECODE (MIN_EXPR, "min_expr", "2", 2)
-DEFTREECODE (MAX_EXPR, "max_expr", "2", 2)
-DEFTREECODE (ABS_EXPR, "abs_expr", "1", 1)
-DEFTREECODE (FFS_EXPR, "ffs_expr", "1", 1)
+DEFTREECODE (MIN_EXPR, "min_expr", '2', 2)
+DEFTREECODE (MAX_EXPR, "max_expr", '2', 2)
+DEFTREECODE (ABS_EXPR, "abs_expr", '1', 1)
+DEFTREECODE (FFS_EXPR, "ffs_expr", '1', 1)
/* Shift operations for shift and rotate.
- Shift is supposed to mean logical shift if done on an
- unsigned type, arithmetic shift on a signed type.
+ Shift means logical shift if done on an
+ unsigned type, arithmetic shift if done on a signed type.
The second operand is the number of bits to
- shift by, and must always have mode SImode.
- The result has the same mode as the first operand. */
-DEFTREECODE (LSHIFT_EXPR, "alshift_expr", "2", 2)
-DEFTREECODE (RSHIFT_EXPR, "arshift_expr", "2", 2)
-DEFTREECODE (LROTATE_EXPR, "lrotate_expr", "2", 2)
-DEFTREECODE (RROTATE_EXPR, "rrotate_expr", "2", 2)
+ shift by; it need not be the same type as the first operand and result. */
+DEFTREECODE (LSHIFT_EXPR, "lshift_expr", '2', 2)
+DEFTREECODE (RSHIFT_EXPR, "rshift_expr", '2', 2)
+DEFTREECODE (LROTATE_EXPR, "lrotate_expr", '2', 2)
+DEFTREECODE (RROTATE_EXPR, "rrotate_expr", '2', 2)
/* Bitwise operations. Operands have same mode as result. */
-DEFTREECODE (BIT_IOR_EXPR, "bit_ior_expr", "2", 2)
-DEFTREECODE (BIT_XOR_EXPR, "bit_xor_expr", "2", 2)
-DEFTREECODE (BIT_AND_EXPR, "bit_and_expr", "2", 2)
-DEFTREECODE (BIT_ANDTC_EXPR, "bit_andtc_expr", "2", 2)
-DEFTREECODE (BIT_NOT_EXPR, "bit_not_expr", "1", 1)
+DEFTREECODE (BIT_IOR_EXPR, "bit_ior_expr", '2', 2)
+DEFTREECODE (BIT_XOR_EXPR, "bit_xor_expr", '2', 2)
+DEFTREECODE (BIT_AND_EXPR, "bit_and_expr", '2', 2)
+DEFTREECODE (BIT_ANDTC_EXPR, "bit_andtc_expr", '2', 2)
+DEFTREECODE (BIT_NOT_EXPR, "bit_not_expr", '1', 1)
/* Combination of boolean values or of integers considered only
as zero or nonzero. ANDIF and ORIF allow the second operand
not to be computed if the value of the expression is determined
from the first operand. AND, OR, and XOR always compute the second
operand whether its value is needed or not (for side effects). */
-DEFTREECODE (TRUTH_ANDIF_EXPR, "truth_andif_expr", "e", 2)
-DEFTREECODE (TRUTH_ORIF_EXPR, "truth_orif_expr", "e", 2)
-DEFTREECODE (TRUTH_AND_EXPR, "truth_and_expr", "e", 2)
-DEFTREECODE (TRUTH_OR_EXPR, "truth_or_expr", "e", 2)
-DEFTREECODE (TRUTH_XOR_EXPR, "truth_xor_expr", "e", 2)
-DEFTREECODE (TRUTH_NOT_EXPR, "truth_not_expr", "e", 1)
+DEFTREECODE (TRUTH_ANDIF_EXPR, "truth_andif_expr", 'e', 2)
+DEFTREECODE (TRUTH_ORIF_EXPR, "truth_orif_expr", 'e', 2)
+DEFTREECODE (TRUTH_AND_EXPR, "truth_and_expr", 'e', 2)
+DEFTREECODE (TRUTH_OR_EXPR, "truth_or_expr", 'e', 2)
+DEFTREECODE (TRUTH_XOR_EXPR, "truth_xor_expr", 'e', 2)
+DEFTREECODE (TRUTH_NOT_EXPR, "truth_not_expr", 'e', 1)
/* Relational operators.
`EQ_EXPR' and `NE_EXPR' are allowed for any types.
or real types.
In all cases the operands will have the same type,
and the value is always the type used by the language for booleans. */
-DEFTREECODE (LT_EXPR, "lt_expr", "<", 2)
-DEFTREECODE (LE_EXPR, "le_expr", "<", 2)
-DEFTREECODE (GT_EXPR, "gt_expr", "<", 2)
-DEFTREECODE (GE_EXPR, "ge_expr", "<", 2)
-DEFTREECODE (EQ_EXPR, "eq_expr", "<", 2)
-DEFTREECODE (NE_EXPR, "ne_expr", "<", 2)
+DEFTREECODE (LT_EXPR, "lt_expr", '<', 2)
+DEFTREECODE (LE_EXPR, "le_expr", '<', 2)
+DEFTREECODE (GT_EXPR, "gt_expr", '<', 2)
+DEFTREECODE (GE_EXPR, "ge_expr", '<', 2)
+DEFTREECODE (EQ_EXPR, "eq_expr", '<', 2)
+DEFTREECODE (NE_EXPR, "ne_expr", '<', 2)
+
+/* Additional relational operators for floating point unordered. */
+DEFTREECODE (UNORDERED_EXPR, "unordered_expr", '<', 2)
+DEFTREECODE (ORDERED_EXPR, "ordered_expr", '<', 2)
+
+/* These are equivalent to unordered or ... */
+DEFTREECODE (UNLT_EXPR, "unlt_expr", '<', 2)
+DEFTREECODE (UNLE_EXPR, "unle_expr", '<', 2)
+DEFTREECODE (UNGT_EXPR, "ungt_expr", '<', 2)
+DEFTREECODE (UNGE_EXPR, "unge_expr", '<', 2)
+DEFTREECODE (UNEQ_EXPR, "uneq_expr", '<', 2)
/* Operations for Pascal sets. Not used now. */
-DEFTREECODE (IN_EXPR, "in_expr", "2", 2)
-DEFTREECODE (SET_LE_EXPR, "set_le_expr", "<", 2)
-DEFTREECODE (CARD_EXPR, "card_expr", "1", 1)
-DEFTREECODE (RANGE_EXPR, "range_expr", "2", 2)
+DEFTREECODE (IN_EXPR, "in_expr", '2', 2)
+DEFTREECODE (SET_LE_EXPR, "set_le_expr", '<', 2)
+DEFTREECODE (CARD_EXPR, "card_expr", '1', 1)
+DEFTREECODE (RANGE_EXPR, "range_expr", '2', 2)
/* Represents a conversion of type of a value.
All conversions, including implicit ones, must be
- represented by CONVERT_EXPR nodes. */
-DEFTREECODE (CONVERT_EXPR, "convert_expr", "1", 1)
+ represented by CONVERT_EXPR or NOP_EXPR nodes. */
+DEFTREECODE (CONVERT_EXPR, "convert_expr", '1', 1)
/* Represents a conversion expected to require no code to be generated. */
-DEFTREECODE (NOP_EXPR, "nop_expr", "1", 1)
+DEFTREECODE (NOP_EXPR, "nop_expr", '1', 1)
/* Value is same as argument, but guaranteed not an lvalue. */
-DEFTREECODE (NON_LVALUE_EXPR, "non_lvalue_expr", "1", 1)
+DEFTREECODE (NON_LVALUE_EXPR, "non_lvalue_expr", '1', 1)
/* Represents something we computed once and will use multiple times.
First operand is that expression. Second is the function decl
in which the SAVE_EXPR was created. The third operand is the RTL,
nonzero only after the expression has been computed. */
-DEFTREECODE (SAVE_EXPR, "save_expr", "e", 3)
-
-/* Represents something whose RTL has already been expanded
- as a sequence which should be emitted when this expression is expanded.
- The first operand is the RTL to emit. It is the first of a chain of insns.
- The second is the RTL expression for the result. */
-DEFTREECODE (RTL_EXPR, "rtl_expr", "e", 2)
+DEFTREECODE (SAVE_EXPR, "save_expr", 'e', 3)
+
+/* For a UNSAVE_EXPR, operand 0 is the value to unsave. By unsave, we
+ mean that all _EXPRs such as TARGET_EXPRs, SAVE_EXPRs,
+ CALL_EXPRs and RTL_EXPRs, that are protected
+ from being evaluated more than once should be reset so that a new
+ expand_expr call of this expr will cause those to be re-evaluated.
+ This is useful when we want to reuse a tree in different places,
+ but where we must re-expand. */
+DEFTREECODE (UNSAVE_EXPR, "unsave_expr", 'e', 1)
+
+/* Represents something whose RTL has already been expanded as a
+ sequence which should be emitted when this expression is expanded.
+ The first operand is the RTL to emit. It is the first of a chain
+ of insns. The second is the RTL expression for the result. Any
+ temporaries created during the building of the RTL_EXPR can be
+ reused once the RTL_EXPR has been expanded, with the exception of
+ the RTL_EXPR_RTL. */
+DEFTREECODE (RTL_EXPR, "rtl_expr", 'e', 2)
/* & in C. Value is the address at which the operand's value resides.
Operand may have any mode. Result mode is Pmode. */
-DEFTREECODE (ADDR_EXPR, "addr_expr", "e", 1)
+DEFTREECODE (ADDR_EXPR, "addr_expr", 'e', 1)
/* Non-lvalue reference or pointer to an object. */
-DEFTREECODE (REFERENCE_EXPR, "reference_expr", "e", 1)
+DEFTREECODE (REFERENCE_EXPR, "reference_expr", 'e', 1)
/* Operand is a function constant; result is a function variable value
of typeEPmode. Used only for languages that need static chains. */
-DEFTREECODE (ENTRY_VALUE_EXPR, "entry_value_expr", "e", 1)
+DEFTREECODE (ENTRY_VALUE_EXPR, "entry_value_expr", 'e', 1)
/* Given two real or integer operands of the same type,
returns a complex value of the corresponding complex type. */
-DEFTREECODE (COMPLEX_EXPR, "complex_expr", "2", 2)
+DEFTREECODE (COMPLEX_EXPR, "complex_expr", '2', 2)
-/* Complex conjugate of operand. Used only on complex types.
- The value has the same type as the operand. */
-DEFTREECODE (CONJ_EXPR, "conj_expr", "1", 1)
+/* Complex conjugate of operand. Used only on complex types. */
+DEFTREECODE (CONJ_EXPR, "conj_expr", '1', 1)
/* Used only on an operand of complex type, these return
a value of the corresponding component type. */
-DEFTREECODE (REALPART_EXPR, "realpart_expr", "1", 1)
-DEFTREECODE (IMAGPART_EXPR, "imagpart_expr", "1", 1)
+DEFTREECODE (REALPART_EXPR, "realpart_expr", '1', 1)
+DEFTREECODE (IMAGPART_EXPR, "imagpart_expr", '1', 1)
/* Nodes for ++ and -- in C.
The second arg is how much to increment or decrement by.
For a pointer, it would be the size of the object pointed to. */
-DEFTREECODE (PREDECREMENT_EXPR, "predecrement_expr", "e", 2)
-DEFTREECODE (PREINCREMENT_EXPR, "preincrement_expr", "e", 2)
-DEFTREECODE (POSTDECREMENT_EXPR, "postdecrement_expr", "e", 2)
-DEFTREECODE (POSTINCREMENT_EXPR, "postincrement_expr", "e", 2)
+DEFTREECODE (PREDECREMENT_EXPR, "predecrement_expr", 'e', 2)
+DEFTREECODE (PREINCREMENT_EXPR, "preincrement_expr", 'e', 2)
+DEFTREECODE (POSTDECREMENT_EXPR, "postdecrement_expr", 'e', 2)
+DEFTREECODE (POSTINCREMENT_EXPR, "postincrement_expr", 'e', 2)
+
+/* Used to implement `va_arg'. */
+DEFTREECODE (VA_ARG_EXPR, "va_arg_expr", 'e', 1)
+
+/* Evaluate operand 1. If and only if an exception is thrown during
+ the evaluation of operand 1, evaluate operand 2.
+
+ This differs from WITH_CLEANUP_EXPR, in that operand 2 is never
+ evaluated unless an exception is throw. */
+DEFTREECODE (TRY_CATCH_EXPR, "try_catch_expr", 'e', 2)
+
+/* Evaluate the first operand.
+ The second operand is a a cleanup expression which is evaluated
+ before an exit (normal, exception, or jump out) from this expression.
+
+ Like a CLEANUP_POINT_EXPR/WITH_CLEANUP_EXPR combination, but those
+ always copy the cleanup expression where needed. In contrast,
+ TRY_FINALLY_EXPR generates a jump to a cleanup subroutine.
+ (At least conceptually; the optimizer could inline the cleanup
+ subroutine in the same way it could inline normal subroutines.)
+ TRY_FINALLY_EXPR should be used when the cleanup is actual statements
+ in the source of the current function (which people might want to
+ set breakpoints in). */
+DEFTREECODE (TRY_FINALLY_EXPR, "try_finally", 'e', 2)
+
+/* Used internally for cleanups in the implementation of TRY_FINALLY_EXPR.
+ (Specifically, it is created by expand_expr, not front-ends.)
+ Operand 0 is the rtx for the start of the subroutine we need to call.
+ Operand 1 is the rtx for a variable in which to store the address
+ of where the subroutine should return to. */
+DEFTREECODE (GOTO_SUBROUTINE_EXPR, "goto_subroutine", 'e', 2)
+
+/* Pop the top element off the dynamic handler chain. Used in
+ conjunction with setjmp/longjmp based exception handling, see
+ except.c for more details. This is meant to be used only by the
+ exception handling backend, expand_dhc_cleanup specifically. */
+DEFTREECODE (POPDHC_EXPR, "popdhc_expr", 's', 0)
+
+/* Pop the top element off the dynamic cleanup chain. Used in
+ conjunction with the exception handling. This is meant to be used
+ only by the exception handling backend. */
+DEFTREECODE (POPDCC_EXPR, "popdcc_expr", 's', 0)
\f
/* These types of expressions have no useful value,
and always have side effects. */
/* A label definition, encapsulated as a statement.
Operand 0 is the LABEL_DECL node for the label that appears here.
The type should be void and the value should be ignored. */
-DEFTREECODE (LABEL_EXPR, "label_expr", "s", 1)
+DEFTREECODE (LABEL_EXPR, "label_expr", 's', 1)
-/* GOTO. Operand 0 is a LABEL_DECL node.
+/* GOTO. Operand 0 is a LABEL_DECL node or an expression.
The type should be void and the value should be ignored. */
-DEFTREECODE (GOTO_EXPR, "goto_expr", "s", 1)
+DEFTREECODE (GOTO_EXPR, "goto_expr", 's', 1)
/* RETURN. Evaluates operand 0, then returns from the current function.
Presumably that operand is an assignment that stores into the
RESULT_DECL that hold the value to be returned.
The operand may be null.
The type should be void and the value should be ignored. */
-DEFTREECODE (RETURN_EXPR, "return_expr", "s", 1)
+DEFTREECODE (RETURN_EXPR, "return_expr", 's', 1)
/* Exit the inner most loop conditionally. Operand 0 is the condition.
The type should be void and the value should be ignored. */
-DEFTREECODE (EXIT_EXPR, "exit_expr", "s", 1)
+DEFTREECODE (EXIT_EXPR, "exit_expr", 's', 1)
/* A loop. Operand 0 is the body of the loop.
It must contain an EXIT_EXPR or is an infinite loop.
The type should be void and the value should be ignored. */
-DEFTREECODE (LOOP_EXPR, "loop_expr", "s", 1)
-
+DEFTREECODE (LOOP_EXPR, "loop_expr", 's', 1)
+
+/* A labeled block. Operand 0 is the label that will be generated to
+ mark the end of the block.
+ Operand 1 is the labeled block body. */
+DEFTREECODE (LABELED_BLOCK_EXPR, "labeled_block_expr", 'e', 2)
+
+/* Exit a labeled block, possibly returning a value. Operand 0 is a
+ LABELED_BLOCK_EXPR to exit. Operand 1 is the value to return. It
+ may be left null. */
+DEFTREECODE (EXIT_BLOCK_EXPR, "exit_block_expr", 'e', 2)
+
+/* Annotates a tree node (usually an expression) with source location
+ information: a file name (EXPR_WFL_FILENAME); a line number
+ (EXPR_WFL_LINENO); and column number (EXPR_WFL_COLNO). It is
+ expanded as the contained node (EXPR_WFL_NODE); a line note should
+ be emitted first if EXPR_WFL_EMIT_LINE_NOTE.
+ The third operand is only used in the Java front-end, and will
+ eventually be removed. */
+DEFTREECODE (EXPR_WITH_FILE_LOCATION, "expr_with_file_location", 'e', 3)
+
+/* Switch expression.
+ Operand 0 is the expression used to perform the branch,
+ Operand 1 contains the case values. The way they're organized is
+ front-end implementation defined. */
+DEFTREECODE (SWITCH_EXPR, "switch_expr", 'e', 2)
/*
Local variables:
mode:c
-version-control: t
End:
*/
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