1 /****************************************************************************
3 * GNAT COMPILER COMPONENTS
*
5 * GNAT
-SPECIFIC GCC TREE CODES
*
10 * Copyright (C
) 1992-2001 Free Software Foundation
, Inc.
*
12 * GNAT is free software
; you can redistribute it and
/or modify it under
*
13 * terms of the GNU General Public License as published by the Free Soft
- *
14 * ware Foundation
; either version
2, or (at your option
) any later ver
- *
15 * sion. GNAT is distributed in the hope that it will be useful
, but
WITH- *
16 * OUT ANY WARRANTY
; without even the implied warranty of MERCHANTABILITY
*
17 * or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License
*
18 * for more details. You should have received a copy of the GNU General
*
19 * Public License distributed with GNAT
; see file COPYING. If not
, write
*
20 * to the Free Software Foundation
, 59 Temple Place
- Suite
330, Boston
, *
21 * MA
02111-1307, USA.
*
23 * GNAT was originally developed by the GNAT team at New York University.
*
24 * Extensive contributions were provided by Ada Core Technologies Inc.
*
26 ****************************************************************************/
28 /* A GNAT tree node to transform to a GCC tree. This is only used when the
29 node would generate code
, rather then just a tree
, and we are in the global
32 The only field used is TREE_COMPLEXITY
, which contains the GNAT node
35 DEFTREECODE (TRANSFORM_EXPR
, "transform_expr", 'e', 0)
37 /* Dynamically allocate on the stack a number of bytes of memory given
38 by operand
0 at the alignment given by operand
1 and return the
39 address of the resulting memory.
*/
41 DEFTREECODE (ALLOCATE_EXPR
, "allocate_expr", 's', 2)
43 /* A type that is an unconstrained array itself. This node is never passed
44 to GCC. TREE_TYPE is the type of the fat pointer and TYPE_OBJECT_RECORD_TYPE
45 is the type of a record containing the template and data.
*/
47 DEFTREECODE (UNCONSTRAINED_ARRAY_TYPE
, "unconstrained_array_type", 't', 0)
49 /* A reference to an unconstrained array. This node only exists as an
50 intermediate node during the translation of a GNAT tree to a GCC tree
;
51 it is never passed to GCC. The only field used is operand
0, which
52 is the fat pointer object.
*/
54 DEFTREECODE (UNCONSTRAINED_ARRAY_REF
, "unconstrained_array_ref", 'r', 1)
56 /* An expression that returns an RTL suitable for its type. Operand
0
57 is an expression to be evaluated for side effects only.
*/
59 DEFTREECODE (NULL_EXPR
, "null_expr", 'e', 1)
61 /* An expression that emits a USE for its single operand.
*/
63 DEFTREECODE (USE_EXPR
, "use_expr", 'e', 1)
65 /* Same as ADDR_EXPR
, except that if the operand represents a bit field
,
66 return the address of the byte containing the bit. This is used
67 for the
'Address attribute and never shows up in the tree. */
68 DEFTREECODE (ATTR_ADDR_EXPR, "attr_addr_expr", 'r
', 1)
70 /* An expression that is treated as a conversion while generating code, but is
71 used to prevent infinite recursion when conversions of biased types are
74 DEFTREECODE (GNAT_NOP_EXPR, "gnat_nop_expr", '1', 1)
76 /* This is used as a place to store the ID of a loop.
78 ??? This should be redone at some point. */
80 DEFTREECODE (GNAT_LOOP_ID, "gnat_loop_id", 'x
', 1)