3 * File name: ir/opt/ifconv.h
4 * Purpose: If conversion.
5 * Author: Sebastian Hack.
8 * Copyright: (c) 1998-2005 Universität Karlsruhe
9 * Licence: This file protected by GPL - GNU GENERAL PUBLIC LICENSE.
11 #ifndef _FIRM_IF_CONV_H
12 #define _FIRM_IF_CONV_H
18 * @author Sebastian Hack
24 * This function is called to evaluate, if a mux can build
25 * of the current architecture.
26 * If it returns non-zero, a mux is created, else the code
28 * @param sel A selector of a Cond.
29 * @param phi_list List of Phi nodes about to be converted (linked via link field)
30 * @param i First data predecessor involved in if conversion
31 * @param j Second data predecessor involved in if conversion
33 typedef int (*arch_allow_ifconv_func)(ir_node *sel, ir_node* phi_list, int i, int j);
36 * The parameters structure.
38 typedef struct _opt_if_conv_info_t {
39 int max_depth; /**< The maximum depth up to which expressions
40 are examined when it has to be decided if they
41 can be placed into another block. */
42 arch_allow_ifconv_func allow_ifconv; /**< Evaluator function, if not set all possible Psi
43 nodes will be created. */
47 * Perform If conversion on a graph.
49 * @param irg The graph.
50 * @param params The parameters for the if conversion.
52 * Cannot handle blocks with Bad control predecessors, so call it after control
55 void opt_if_conv(ir_graph *irg, const opt_if_conv_info_t *params);
57 #endif /* _FIRM_IF_CONV_H */