2 * Copyright (C) 1995-2007 Inria Rhone-Alpes. 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 * @author Sebastian Hack
26 * Live in/end checks whose only precomputation concerns the structure of the CFG.
27 * Hence, nothing has to be updated if the program is modified unless the CFG is touched.
28 * See .c file for more comments.
31 #ifndef FIRM_ANA_IRLIVECHK_H
32 #define FIRM_ANA_IRLIVECHK_H
42 lv_chk_state_through = lv_chk_state_in | lv_chk_state_out | lv_chk_state_end,
45 typedef struct lv_chk_t lv_chk_t;
48 * Filter out some nodes for which we never need liveness.
50 * @param irn the node t check
51 * @return 0 if no liveness info is needed, 1 else
53 static inline bool is_liveness_node(const ir_node *irn)
55 switch (get_irn_opcode(irn)) {
68 * Make a new liveness check environment.
69 * @param irg The graph.
70 * @return The environment.
72 extern lv_chk_t *lv_chk_new(ir_graph *irg);
75 * Free liveness check information.
76 * @param lv The liveness check information.
78 extern void lv_chk_free(lv_chk_t *lv);
82 * Return liveness information for a node concerning a block.
83 * @param lv The liveness environment.
84 * @param bl The block to investigate.
85 * @param irn The node to check for.
86 * @return A bitmask of <code>lv_chk_state_t</code>.
88 extern unsigned lv_chk_bl_xxx(lv_chk_t *lv, const ir_node *bl, const ir_node *irn);
90 #define lv_chk_bl_in(lv, bl, irn) ((lv_chk_bl_xxx((lv), (bl), (irn)) & lv_chk_state_in) != 0)
91 #define lv_chk_bl_end(lv, bl, irn) ((lv_chk_bl_xxx((lv), (bl), (irn)) & lv_chk_state_end) != 0)
92 #define lv_chk_bl_out(lv, bl, irn) ((lv_chk_bl_xxx((lv), (bl), (irn)) & lv_chk_state_out) != 0)
94 #endif /* FIRM_ANA_IRLIVECHK_H */