/* Graph coloring register allocator
- Copyright (C) 2001, 2002 Free Software Foundation, Inc.
+ Copyright (C) 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
Contributed by Michael Matz <matz@suse.de>
and Daniel Berlin <dan@cgsoftware.com>.
with GCC; see the file COPYING. If not, write to the Free Software
Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+#ifndef GCC_RA_H
+#define GCC_RA_H
+
+#include "bitmap.h"
+#include "sbitmap.h"
+#include "hard-reg-set.h"
+#include "insn-modes.h"
+
/* Double linked list to implement the per-type lists of webs
and moves. */
struct dlist
#define DLIST_MOVE(l) ((l)->value.move)
/* Classification of a given node (i.e. what state it's in). */
-enum node_type
+enum ra_node_type
{
INITIAL = 0, FREE,
PRECOLORED,
was illegal for hardregs in CLASS_CANNOT_CHANGE_MODE. */
unsigned int mode_changed:1;
+ /* Nonzero if some references of this web, where in subreg context,
+ but the actual subreg is already stripped (i.e. we don't know the
+ outer mode of the actual reference). */
+ unsigned int subreg_stripped:1;
+
/* Nonzero, when this web stems from the last pass of the allocator,
and all info is still valid (i.e. it wasn't spilled). */
unsigned int old_web:1;
unsigned int have_orig_conflicts:1;
/* Current state of the node. */
- ENUM_BITFIELD(node_type) type:5;
+ ENUM_BITFIELD(ra_node_type) type:5;
/* A regclass, combined from preferred and alternate class, or calculated
from usable_regs. Used only for debugging, and to determine
/* Number of usable colors in usable_regs. */
int num_freedom;
- /* After successfull coloring the graph each web gets a new reg rtx,
+ /* After successful coloring the graph each web gets a new reg rtx,
with which the original uses and defs are replaced. This is it. */
rtx reg_rtx;
/* The largest DF_REF_ID of defs resp. uses, as it was in the
last pass. In the first pass this is zero. Used to distinguish new
- from old refrences. */
+ from old references. */
extern unsigned int last_def_id;
extern unsigned int last_use_id;
extern HARD_REG_SET usable_regs[N_REG_CLASSES];
/* For each class C the count of hardregs in usable_regs[C]. */
extern unsigned int num_free_regs[N_REG_CLASSES];
+/* For each class C which has num_free_regs[C]==1, the color of the
+ single register in that class, -1 otherwise. */
+extern int single_reg_in_regclass[N_REG_CLASSES];
/* For each mode M the hardregs, which are MODE_OK for M, and have
enough space behind them to hold an M value. Additionally
if reg R is OK for mode M, but it needs two hardregs, then R+1 will
represent the possible resources which could be taken away be a value
in mode M. */
extern HARD_REG_SET hardregs_for_mode[NUM_MACHINE_MODES];
+/* The set of hardregs, for which _any_ mode change is invalid. */
+extern HARD_REG_SET invalid_mode_change_regs;
/* For 0 <= I <= 255, the number of bits set in I. Used to calculate
the number of set bits in a HARD_REG_SET. */
extern unsigned char byte2bitcount[256];
extern int flag_ra_merge_spill_costs;
/* Nonzero if we want to spill at every use, instead of at deaths,
- or intereference region borders. */
+ or interference region borders. */
extern int flag_ra_spill_every_use;
/* Nonzero to output all notes in the debug dumps. */
extern int flag_ra_dump_notes;
-extern inline void * ra_alloc PARAMS ((size_t));
-extern inline void * ra_calloc PARAMS ((size_t));
-extern int hard_regs_count PARAMS ((HARD_REG_SET));
-extern rtx ra_emit_move_insn PARAMS ((rtx, rtx));
-extern void ra_debug_msg PARAMS ((unsigned int,
- const char *, ...)) ATTRIBUTE_PRINTF_2;
-extern int hard_regs_intersect_p PARAMS ((HARD_REG_SET *, HARD_REG_SET *));
-extern unsigned int rtx_to_bits PARAMS ((rtx));
-extern struct web * find_subweb PARAMS ((struct web *, rtx));
-extern struct web * find_subweb_2 PARAMS ((struct web *, unsigned int));
-extern struct web * find_web_for_subweb_1 PARAMS ((struct web *));
+extern void * ra_alloc (size_t);
+extern void * ra_calloc (size_t);
+extern int hard_regs_count (HARD_REG_SET);
+extern rtx ra_emit_move_insn (rtx, rtx);
+extern void ra_debug_msg (unsigned int, const char *, ...) ATTRIBUTE_PRINTF_2;
+extern int hard_regs_intersect_p (HARD_REG_SET *, HARD_REG_SET *);
+extern unsigned int rtx_to_bits (rtx);
+extern struct web * find_subweb (struct web *, rtx);
+extern struct web * find_subweb_2 (struct web *, unsigned int);
+extern struct web * find_web_for_subweb_1 (struct web *);
#define find_web_for_subweb(w) (((w)->parent_web) \
? find_web_for_subweb_1 ((w)->parent_web) \
: (w))
-extern void ra_build_realloc PARAMS ((struct df *));
-extern void ra_build_free PARAMS ((void));
-extern void ra_build_free_all PARAMS ((struct df *));
-extern void ra_colorize_init PARAMS ((void));
-extern void ra_colorize_free_all PARAMS ((void));
-extern void ra_rewrite_init PARAMS ((void));
-
-extern void ra_print_rtx PARAMS ((FILE *, rtx, int));
-extern void ra_print_rtx_top PARAMS ((FILE *, rtx, int));
-extern void ra_debug_rtx PARAMS ((rtx));
-extern void ra_debug_insns PARAMS ((rtx, int));
-extern void ra_debug_bbi PARAMS ((int));
-extern void ra_print_rtl_with_bb PARAMS ((FILE *, rtx));
-extern void dump_igraph PARAMS ((struct df *));
-extern void dump_igraph_machine PARAMS ((void));
-extern void dump_constraints PARAMS ((void));
-extern void dump_cost PARAMS ((unsigned int));
-extern void dump_graph_cost PARAMS ((unsigned int, const char *));
-extern void dump_ra PARAMS ((struct df *));
-extern void dump_number_seen PARAMS ((void));
-extern void dump_static_insn_cost PARAMS ((FILE *, const char *,
- const char *));
-extern void dump_web_conflicts PARAMS ((struct web *));
-extern void dump_web_insns PARAMS ((struct web*));
-extern int web_conflicts_p PARAMS ((struct web *, struct web *));
-extern void debug_hard_reg_set PARAMS ((HARD_REG_SET));
-
-extern void remove_list PARAMS ((struct dlist *, struct dlist **));
-extern struct dlist * pop_list PARAMS ((struct dlist **));
-extern void record_conflict PARAMS ((struct web *, struct web *));
-extern int memref_is_stack_slot PARAMS ((rtx));
-extern void build_i_graph PARAMS ((struct df *));
-extern void put_web PARAMS ((struct web *, enum node_type));
-extern void remove_web_from_list PARAMS ((struct web *));
-extern void reset_lists PARAMS ((void));
-extern struct web * alias PARAMS ((struct web *));
-extern void merge_moves PARAMS ((struct web *, struct web *));
-extern void ra_colorize_graph PARAMS ((struct df *));
-
-extern void actual_spill PARAMS ((void));
-extern void emit_colors PARAMS ((struct df *));
-extern void delete_moves PARAMS ((void));
-extern void setup_renumber PARAMS ((int));
-extern void remove_suspicious_death_notes PARAMS ((void));
+extern void ra_build_realloc (struct df *);
+extern void ra_build_free (void);
+extern void ra_build_free_all (struct df *);
+extern void ra_colorize_init (void);
+extern void ra_colorize_free_all (void);
+extern void ra_rewrite_init (void);
+
+extern void ra_print_rtx (FILE *, rtx, int);
+extern void ra_print_rtx_top (FILE *, rtx, int);
+extern void ra_debug_rtx (rtx);
+extern void ra_debug_insns (rtx, int);
+extern void ra_debug_bbi (int);
+extern void ra_print_rtl_with_bb (FILE *, rtx);
+extern void dump_igraph (struct df *);
+extern void dump_igraph_machine (void);
+extern void dump_constraints (void);
+extern void dump_cost (unsigned int);
+extern void dump_graph_cost (unsigned int, const char *);
+extern void dump_ra (struct df *);
+extern void dump_number_seen (void);
+extern void dump_static_insn_cost (FILE *, const char *, const char *);
+extern void dump_web_conflicts (struct web *);
+extern void dump_web_insns (struct web*);
+extern int web_conflicts_p (struct web *, struct web *);
+extern void debug_hard_reg_set (HARD_REG_SET);
+
+extern void remove_list (struct dlist *, struct dlist **);
+extern struct dlist * pop_list (struct dlist **);
+extern void record_conflict (struct web *, struct web *);
+extern int memref_is_stack_slot (rtx);
+extern void build_i_graph (struct df *);
+extern void put_web (struct web *, enum ra_node_type);
+extern void remove_web_from_list (struct web *);
+extern void reset_lists (void);
+extern struct web * alias (struct web *);
+extern void merge_moves (struct web *, struct web *);
+extern void ra_colorize_graph (struct df *);
+
+extern void actual_spill (void);
+extern void emit_colors (struct df *);
+extern void delete_moves (void);
+extern void setup_renumber (int);
+extern void remove_suspicious_death_notes (void);
+
+#endif /* GCC_RA_H */
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