--- /dev/null
+/* This file contains the definitions and documentation for the
+ tree codes used in the GNU C compiler.
+ Copyright (C) 1987, 1988 Free Software Foundation, Inc.
+
+This file is part of GNU CC.
+
+GNU CC is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU CC is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+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 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. */
+
+/* For `r', `e', `<', `1', `2', `s' and `x' nodes,
+ the 4th element is the number of argument slots to allocate.
+ This determines the size of the tree node object. */
+
+/* Any erroneous construct is parsed into a node of this type.
+ This type of node is accepted without complaint in all contexts
+ 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)
+
+/* 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)
+
+/* 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)
+
+/* 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)
+
+/* These nodes contain an array of tree nodes. */
+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
+ chained through the BLOCK_CHAIN field.
+ BLOCK_SUPERCONTEXT points to the parent block.
+ For a block which represents the outermost scope of a function, it
+ points to the FUNCTION_DECL node.
+ BLOCK_VARS points to a chain of decl nodes.
+ BLOCK_TYPE_TAGS points to a chain of types which have their own names.
+ BLOCK_CHAIN points to the next BLOCK at the same level.
+ BLOCK_ABSTRACT_ORIGIN points to the original (abstract) tree node which
+ this block is an instance of, or else is NULL to indicate that this
+ block is not an instance of anything else. When non-NULL, the value
+ could either point to another BLOCK node or it could point to a
+ FUNCTION_DECL node (e.g. in the case of a block representing the
+ 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)
+\f
+/* Each data type is represented by a tree node whose code is one of
+ the following: */
+/* Each node that represents a data type has a component TYPE_SIZE
+ containing a tree that is an expression for the size in bits.
+ The TYPE_MODE contains the machine mode for values of this type.
+ The TYPE_POINTER_TO field contains a type for a pointer to this type,
+ or zero if no such has been created yet.
+ The TYPE_NEXT_VARIANT field is used to chain together types
+ that are variants made by type modifiers such as "const" and "volatile".
+ The TYPE_MAIN_VARIANT field, in any member of such a chain,
+ 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 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
+ in the case of structs, unions or enums that are known with a tag,
+ or zero for types that have no special name.
+ The TYPE_CONTEXT for any sort of type which could have a name or
+ which could have named members (e.g. tagged types in C/C++) will
+ point to the node which represents the scope of the given type, or
+ will be NULL_TREE if the type has "file scope". For most types, this
+ will point to a BLOCK node or a FUNCTION_DECL node, but it could also
+ point to a FUNCTION_TYPE node (for types whose scope is limited to the
+ formal parameter list of some function type specification) or it
+ could point to a RECORD_TYPE or UNION_TYPE node (for C++ "member" types).
+ For non-tagged-types, TYPE_CONTEXT need not be set to anything in
+ particular, since any type which is of some type category (e.g.
+ an array type or a function type) which cannot either have a name
+ itself or have named members doesn't really have a "scope" per se. */
+/* TREE_CHAIN is used for ENUMERAL_TYPE, RECORD_TYPE and UNION_TYPE
+ nodes used as forward-references to names; see below. */
+
+DEFTREECODE (VOID_TYPE, "void_type", "t", 0) /* The void type in C */
+
+/* Integer types in all languages, including char in C. */
+/* Has components TYPE_MIN_VALUE, TYPE_MAX_VALUE (expressions, inclusive)
+ and TYPE_PRECISION (number of bits used by this type).
+ In the case of a subrange type in Pascal, the TREE_TYPE
+ of this will point at the supertype (another INTEGER_TYPE).
+ Otherwise, the TREE_TYPE is zero. */
+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)
+
+/* Complex number types. The TREE_TYPE field is the data type
+ of the real and imaginary parts. */
+DEFTREECODE (COMPLEX_TYPE, "complex_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
+ CONST_DECL nodes, but the type does not point to them;
+ however, the TREE_VALUES is a list in which each elements' TREE_PURPOSE
+ is a name and the TREE_VALUE is the value (an INTEGER_CST node). */
+/* A forward reference `enum foo' when no enum named foo is defined yet
+ has zero (a null pointer) in its TYPE_SIZE. The tag name is in
+ the TYPE_NAME field. If the type is later defined, the normal
+ fields are filled in.
+ RECORD_TYPE and UNION_TYPE forward refs are treated similarly. */
+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)
+
+/* CHAR in Pascal; not used in C.
+ No special fields needed. */
+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)
+
+/* 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)
+
+/* 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)
+
+/* 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)
+
+/* Used for Pascal; details not determined right now. */
+DEFTREECODE (FILE_TYPE, "file_type", "t", 0)
+
+/* Types of arrays. Special fields:
+ TREE_TYPE Type of an array element.
+ TYPE_DOMAIN Type to index by.
+ Its range of values specifies the array length.
+ 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. */
+/* Array types in C or Pascal */
+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)
+
+/* Struct in C, or record in Pascal. */
+/* Special fields:
+ TYPE_FIELDS chain of FIELD_DECLs for the fields of the struct.
+ 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)
+
+/* 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 */
+
+/* Type of functions. Special fields:
+ TREE_TYPE type of value returned.
+ TYPE_ARG_TYPES list of types of arguments expected.
+ 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)
+
+/* 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)
+\f
+/* Expressions */
+
+/* First, the constants. */
+
+/* Contents are in TREE_INT_CST_LOW and TREE_INT_CST_HIGH fields,
+ 32 bits each, giving us a 64 bit constant capability.
+ 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)
+
+/* Contents are in TREE_REAL_CST field. Also there is TREE_CST_RTL. */
+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)
+
+/* Contents are TREE_STRING_LENGTH and TREE_STRING_POINTER fields.
+ Also there is TREE_CST_RTL. */
+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.
+ Each DECL has a DECL_NAME field which contains an IDENTIFIER_NODE.
+ (Some decls, most often labels, may have zero as the DECL_NAME).
+ DECL_CONTEXT points to the node representing the context in which
+ this declaration has its scope. For FIELD_DECLs, this is the
+ RECORD_TYPE or 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".
+ DECL_ABSTRACT_ORIGIN, if non-NULL, points to the original (abstract)
+ ..._DECL node of which this decl is an (inlined or template expanded)
+ instance.
+ The TREE_TYPE field holds the data type of the object, when relevant.
+ LABEL_DECLs have no data type. For TYPE_DECL, the TREE_TYPE field
+ contents are the type whose name is being declared.
+ The DECL_ALIGN, DECL_SIZE,
+ and DECL_MODE fields exist in decl nodes just as in type nodes.
+ They are unused in LABEL_DECL, TYPE_DECL and CONST_DECL nodes.
+
+ DECL_OFFSET holds an integer number of bits offset for the location.
+ DECL_VOFFSET holds an expression for a variable offset; it is
+ to be multiplied by DECL_VOFFSET_UNIT (an integer).
+ These fields are relevant only in FIELD_DECLs and PARM_DECLs.
+
+ DECL_INITIAL holds the value to initialize a variable to,
+ or the value of a constant. For a function, it holds the body
+ (a node of type BLOCK representing the function's binding contour
+ and whose body contains the function's statements.) For a LABEL_DECL
+ in C, it is a flag, nonzero if the label's definition has been seen.
+
+ PARM_DECLs use a special field:
+ DECL_ARG_TYPE is the type in which the argument is actually
+ passed, which may be different from its type within the function.
+
+ FUNCTION_DECLs use four special fields:
+ DECL_ARGUMENTS holds a chain of PARM_DECL nodes for the arguments.
+ 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.
+ 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.
+
+ DECL_SOURCE_FILE holds a filename string and DECL_SOURCE_LINE
+ holds a line number. In some cases these can be the location of
+ a reference, if no definition has been seen.
+
+ DECL_ABSTRACT is non-zero if the decl represents an abstract instance
+ 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)
+\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)
+
+/* 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 0 is the structure or union expression;
+ operand 1 is a tree giving the number of bits being referenced;
+ 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)
+
+/* 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)
+
+/* Pascal `^` on a file. One operand, an expression for the file. */
+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)
+
+/* Constructor: return an aggregate value made from specified components.
+ In C, this is used only for structure and array initializers.
+ 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)
+
+/* 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. */
+
+/* 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)
+
+/* Assignment expression. Operand 0 is the what to set; 1, the new value. */
+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)
+
+/* 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)
+
+/* 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)
+
+/* Declare local variables, including making RTL and allocating space.
+ Operand 0 is a chain of VAR_DECL nodes for the variables.
+ Operand 1 is the body, the expression to be computed using
+ the variables. The value of operand 1 becomes that of the BIND_EXPR.
+ Operand 2 is the BLOCK that corresponds to these bindings
+ for debugging purposes. If this BIND_EXPR is actually expanded,
+ that sets the TREE_USED flag in the BLOCK.
+
+ The BIND_EXPR is not responsible for informing parsers
+ about these variables. If the body is coming from the input file,
+ then the code that creates the BIND_EXPR is also responsible for
+ informing the parser of the variables.
+
+ If the BIND_EXPR is ever expanded, its TREE_USED flag is set.
+ This tells the code for debugging symbol tables not to ignore the BIND_EXPR.
+ If the BIND_EXPR should be output for debugging but will not be expanded,
+ set the TREE_USED flag by hand.
+
+ 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)
+
+/* 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)
+
+/* 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)
+
+/* Specify a value to compute along with its corresponding cleanup.
+ Operand 0 argument is an expression whose value needs a cleanup.
+ Operand 1 is an RTL_EXPR which will eventually represent that value.
+ 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)
+
+/* 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)
+
+/* 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)
+
+/* Division for integer result that rounds the quotient toward infinity. */
+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)
+
+/* Division for integer result that rounds toward nearest integer. */
+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)
+
+/* 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 which is not supposed to need rounding.
+ Used for pointer subtraction in C. */
+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)
+
+/* Conversion of an integer to a real. */
+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)
+
+/* Unary negation. Value has same type as operand. */
+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)
+
+/* 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.
+ 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)
+
+/* 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)
+
+/* 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 and OR 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", "2", 2)
+DEFTREECODE (TRUTH_OR_EXPR, "truth_or_expr", "2", 2)
+DEFTREECODE (TRUTH_NOT_EXPR, "truth_not_expr", "e", 1)
+
+/* Relational operators.
+ `EQ_EXPR' and `NE_EXPR' are allowed for any types.
+ The others are allowed only for integer (or pointer or enumeral)
+ 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)
+
+/* 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)
+
+/* 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)
+
+/* Represents a conversion expected to require no code to be generated. */
+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)
+
+/* 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)
+
+/* & 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)
+
+/* Non-lvalue reference or pointer to an object. */
+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)
+
+/* 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)
+
+/* 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)
+
+/* 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)
+
+/* 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)
+\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)
+
+/* GOTO. Operand 0 is a LABEL_DECL node.
+ The type should be void and the value should be ignored. */
+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)
+
+/* 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)
+
+/* 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)
+
+/*
+Local variables:
+mode:c
+version-control: t
+End:
+*/
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