/* 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 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:
/* 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)
+
/* 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).
Operand 0 is the condition.
Operand 1 is the then-value.
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. */
+ Operand 0 may be of any type.
+ Operand 1 must have the same type as the entire expression, unless
+ it unconditionally throws an exception, in which case it should
+ have VOID_TYPE. The same constraints apply to operand 2. */
DEFTREECODE (COND_EXPR, "cond_expr", 'e', 3)
/* Declare local variables, including making RTL and allocating space.
/* 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)
DEFTREECODE (MIN_EXPR, "min_expr", '2', 2)
DEFTREECODE (MAX_EXPR, "max_expr", '2', 2)
+
+/* Represents the absolute value of the operand.
+
+ An ABS_EXPR must have either an INTEGER_TYPE or a REAL_TYPE. The
+ operand of the ABS_EXPR must have the same type. */
DEFTREECODE (ABS_EXPR, "abs_expr", '1', 1)
+
DEFTREECODE (FFS_EXPR, "ffs_expr", '1', 1)
/* Shift operations for shift and rotate.
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)
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. */
Operand 1 contains the case values. The way they're organized is
front-end implementation defined. */
DEFTREECODE (SWITCH_EXPR, "switch_expr", 'e', 2)
+
+/* The exception object from the runtime. */
+DEFTREECODE (EXC_PTR_EXPR, "exc_ptr_expr", 'e', 0)
+
/*
Local variables:
mode:c
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