2 * Copyright (C) 1995-2010 University of Karlsruhe. All right reserved.
4 * This file is part of libFirm.
6 * This file may be distributed and/or modified under the terms of the
7 * GNU General Public License version 2 as published by the Free Software
8 * Foundation and appearing in the file LICENSE.GPL included in the
9 * packaging of this file.
11 * Licensees holding valid libFirm Professional Edition licenses may use
12 * this file in accordance with the libFirm Commercial License.
13 * Agreement provided with the Software.
15 * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
16 * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * @brief Analyse the graph with value range propagation
27 #include "firm_types.h"
33 VRP_UNDEFINED, /**< No information could be derived so far */
34 VRP_RANGE, /**< bottom and top form a range, including both values */
35 VRP_ANTIRANGE, /**< range from bottom to top can not be, but borders might
37 VRP_VARYING /**< information can not be derived */
40 /** VRP information */
42 int valid; /**< This node has valid vrp information */
43 tarval *bits_set; /**< The bits which, by analysis, are definitely set.
44 0: may be not set, 1: definitely set*/
45 tarval *bits_not_set; /**< The bits which by analysis are definitely
46 not set, 1 for may be set, 0: definitely not set */
47 enum range_types range_type; /**< The range represented by range_top, range_bottom */
48 tarval *range_bottom, *range_top;
52 * Set vrp data on the graph irg
53 * @param irg graph on which to set vrp data
55 void set_vrp_data(ir_graph *irg);
58 * Creates an ir_prog_pass for vrp
60 * @param name the name of this pass or NULL
62 ir_graph_pass_t *set_vrp_pass(const char *name);
65 * Test, if the two nodes can be compared with their vrp information
67 * @param left: the left node
68 * @param right: the right node
70 * @return the pn_Cmp, if one can be derived
72 pn_Cmp vrp_cmp(const ir_node *left, const ir_node *right);
75 * Return the vrp data for this node
77 * @param n: the node for which to return the vrp information
79 * @return a pointer to the vrp data or NULL if there is none
81 vrp_attr *vrp_get_info(const ir_node *n);