/* This file contains the definitions and documentation for the
tree codes used in the GNU C compiler.
- Copyright (C) 1987, 1988, 1993, 1995, 1997, 1998, 2000, 2001 Free Software Foundation, Inc.
+ Copyright (C) 1987, 1988, 1993, 1995, 1997, 1998, 2000, 2001
+ Free Software Foundation, Inc.
-This file is part of GNU CC.
+This file is part of GCC.
-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.
+GCC 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.
+GCC 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, 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
+along with GCC; see the file COPYING. If not, write to the Free
+Software Foundation, 59 Temple Place - Suite 330, Boston, MA
+02111-1307, USA. */
/* The third argument can be:
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
/* 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.
+/* Array indexing.
Operand 0 is the array; operand 1 is a (single) array index. */
DEFTREECODE (ARRAY_REF, "array_ref", 'r', 2)
+/* Likewise, except that the result is a range ("slice") of the array. The
+ starting index of the resulting array is taken from operand 1 and the size
+ of the range is taken from the type of the expression. */
+DEFTREECODE (ARRAY_RANGE_REF, "array_range_ref", 'r', 2)
+
+/* Vtable indexing. Carries data useful for emitting information
+ for vtable garbage collection.
+ Operand 0: an array_ref (or equivalent expression)
+ Operand 1: the vtable base (must be a var_decl)
+ Operand 2: index into vtable (must be an integer_cst). */
+DEFTREECODE (VTABLE_REF, "vtable_ref", 'r', 3)
+
/* 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).
/* 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.
+ Operand 1 is the cleanup expression for the object.
+ Operand 2 is an RTL_EXPR which will eventually represent that value.
The RTL_EXPR is used in this expression, which is how the expression
manages to act on the proper value.
The cleanup is executed by the first enclosing CLEANUP_POINT_EXPR, if
/* 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. */
DEFTREECODE (NEGATE_EXPR, "negate_expr", '1', 1)
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; it need not be the same type as the first operand and result. */
+ shift by; it need not be the same type as the first operand and result.
+ Note that the result is undefined if the second operand is larger
+ than the first operand's type size. */
DEFTREECODE (LSHIFT_EXPR, "lshift_expr", '2', 2)
DEFTREECODE (RSHIFT_EXPR, "rshift_expr", '2', 2)
DEFTREECODE (LROTATE_EXPR, "lrotate_expr", '2', 2)
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. */
+ of type EPmode. Used only for languages that need static chains. */
DEFTREECODE (ENTRY_VALUE_EXPR, "entry_value_expr", 'e', 1)
+/* Operand0 is a function constant; result is part N of a function
+ descriptor of type ptr_mode. */
+DEFTREECODE (FDESC_EXPR, "fdesc_expr", 'e', 2)
+
/* 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)