3 * Internal data structures for the chordal register allocator.
4 * @author Sebastian Hack
11 #include "firm_types.h"
12 #include "firm_config.h"
29 #include "bechordal.h"
34 typedef struct _be_ra_chordal_opts_t be_ra_chordal_opts_t;
36 /** Defines an invalid register index. */
40 * A liveness interval border.
42 typedef struct _border_t {
43 unsigned magic; /**< A magic number for checking. */
44 struct list_head list; /**< list head for queuing. */
45 struct _border_t *other_end; /**< The other end of the border. */
46 ir_node *irn; /**< The node. */
47 unsigned step; /**< The number equal to the interval border. */
48 unsigned pressure; /**< The pressure at this interval border. (The border itself is counting). */
49 unsigned is_def : 1; /**< Does this border denote a use or a def. */
50 unsigned is_real : 1; /**< Is the def/use real? Or is it just inserted
51 at block beginnings or ends to ensure that inside
52 a block, each value has one begin and one end. */
56 * Environment for each of the chordal register allocator phases
58 struct _be_chordal_env_t {
59 struct obstack obst; /**< An obstack for temporary storage. */
60 be_ra_chordal_opts_t *opts; /**< A pointer to the chordal ra options. */
61 be_irg_t *birg; /**< Back-end IRG session. */
62 ir_graph *irg; /**< The graph under examination. */
63 const arch_register_class_t *cls; /**< The current register class. */
64 pmap *border_heads; /**< Maps blocks to border heads. */
65 be_ifg_t *ifg; /**< The interference graph. */
66 void *data; /**< Some pointer, to which different phases can attach data to. */
67 bitset_t *ignore_colors; /**< A set of colors which shall be ignored in register allocation. */
68 DEBUG_ONLY(firm_dbg_module_t *dbg;) /**< Debug module for the chordal register allocator. */
71 static INLINE struct list_head *_get_block_border_head(const be_chordal_env_t *inf, ir_node *bl) {
72 return pmap_get(inf->border_heads, bl);
75 #define get_block_border_head(info, bl) _get_block_border_head(info, bl)
77 #define foreach_border_head(head, pos) list_for_each_entry_reverse(border_t, pos, head, list)
78 #define border_next(b) (list_entry((b)->list.next, border_t, list))
79 #define border_prev(b) (list_entry((b)->list.prev, border_t, list))
81 #define chordal_has_class(chordal_env, irn) \
82 arch_irn_consider_in_reg_alloc(chordal_env->birg->main_env->arch_env, chordal_env->cls, irn)
84 int nodes_interfere(const be_chordal_env_t *env, const ir_node *a, const ir_node *b);
86 void be_ra_chordal_color(be_chordal_env_t *chordal_env);
89 * Check a register allocation obtained with the chordal register allocator.
90 * @param chordal_env The chordal environment.
92 void be_ra_chordal_check(be_chordal_env_t *chordal_env);
96 BE_CH_SPILL_BELADY = 1,
97 BE_CH_SPILL_MORGAN = 2,
98 BE_CH_SPILL_REMAT = 3,
101 BE_CH_DUMP_NONE = (1 << 0),
102 BE_CH_DUMP_SPILL = (1 << 1),
103 BE_CH_DUMP_LIVE = (1 << 2),
104 BE_CH_DUMP_COLOR = (1 << 3),
105 BE_CH_DUMP_COPYMIN = (1 << 4),
106 BE_CH_DUMP_SSADESTR = (1 << 5),
107 BE_CH_DUMP_TREE_INTV = (1 << 6),
108 BE_CH_DUMP_CONSTR = (1 << 7),
109 BE_CH_DUMP_SPILLSLOTS = (1 << 8),
110 BE_CH_DUMP_LOWER = (1 << 9),
111 BE_CH_DUMP_APPEL = (1 << 10),
112 BE_CH_DUMP_ALL = 2 * BE_CH_DUMP_APPEL - 1,
117 BE_CH_IFG_CLIQUE = 3,
118 BE_CH_IFG_POINTER = 4,
122 /* lower perm options */
123 BE_CH_LOWER_PERM_SWAP = 1,
124 BE_CH_LOWER_PERM_COPY = 2,
129 BE_CH_VRFY_ASSERT = 3,
132 struct _be_ra_chordal_opts_t {
139 char ilp_server[128];
140 char ilp_solver[128];
144 * Open a file whose name is composed from the graph's name and the current register class.
145 * @note The name of the file will be prefix(ifg_name)_(reg_class_name).suffix
146 * @param prefix The file name's prefix.
147 * @param suffix The file name's ending (the . is inserted automatically).
148 * @return A text file opened for writing.
150 FILE *be_chordal_open(const be_chordal_env_t *env, const char *prefix, const char *suffix);
152 void be_pre_spill_prepare_constr(be_chordal_env_t *cenv);
154 #endif /* _BECHORDAL_T_H */