/* Define per-register tables for data flow info and register allocation.
Copyright (C) 1987, 1993, 1994, 1995, 1996, 1997, 1998,
- 1999, 2000 Free Software Foundation, Inc.
+ 1999, 2000, 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
This file is part of GCC.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING. If not, write to the Free
-Software Foundation, 59 Temple Place - Suite 330, Boston, MA
-02111-1307, USA. */
+Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301, USA. */
+#ifndef GCC_REGS_H
+#define GCC_REGS_H
#include "varray.h"
+#include "obstack.h"
#include "hard-reg-set.h"
#include "basic-block.h"
{ /* fields set by reg_scan */
int first_uid; /* UID of first insn to use (REG n) */
int last_uid; /* UID of last insn to use (REG n) */
- int last_note_uid; /* UID of last note to use (REG n) */
/* fields set by reg_scan & flow_analysis */
int sets; /* # of times (REG n) is set */
int deaths; /* # of times (REG n) dies */
int live_length; /* # of instructions (REG n) is live */
int calls_crossed; /* # of calls (REG n) is live across */
+ int throw_calls_crossed; /* # of calls that may throw (REG n) is live across */
int basic_block; /* # of basic blocks (REG n) is used in */
- char changes_mode; /* whether (SUBREG (REG n)) exists and
- is illegal. */
} reg_info;
-extern varray_type reg_n_info;
+typedef reg_info *reg_info_p;
-extern regset_head subregs_of_mode [NUM_MACHINE_MODES];
+DEF_VEC_P(reg_info_p);
+DEF_VEC_ALLOC_P(reg_info_p,heap);
+
+extern VEC(reg_info_p,heap) *reg_n_info;
/* Indexed by n, gives number of times (REG n) is used or set. */
-#define REG_N_REFS(N) (VARRAY_REG (reg_n_info, N)->refs)
+#define REG_N_REFS(N) (VEC_index (reg_info_p, reg_n_info, N)->refs)
/* Estimate frequency of references to register N. */
-#define REG_FREQ(N) (VARRAY_REG (reg_n_info, N)->freq)
+#define REG_FREQ(N) (VEC_index (reg_info_p, reg_n_info, N)->freq)
-/* The weights for each insn varries from 0 to REG_FREQ_BASE.
+/* The weights for each insn varries from 0 to REG_FREQ_BASE.
This constant does not need to be high, as in infrequently executed
regions we want to count instructions equivalently to optimize for
size instead of speed. */
??? both regscan and flow allocate space for this. We should settle
on just copy. */
-#define REG_N_SETS(N) (VARRAY_REG (reg_n_info, N)->sets)
+#define REG_N_SETS(N) (VEC_index (reg_info_p, reg_n_info, N)->sets)
/* Indexed by N, gives number of insns in which register N dies.
Note that if register N is live around loops, it can die
So this is only a reliable indicator of how many regions of life there are
for registers that are contained in one basic block. */
-#define REG_N_DEATHS(N) (VARRAY_REG (reg_n_info, N)->deaths)
+#define REG_N_DEATHS(N) (VEC_index (reg_info_p, reg_n_info, N)->deaths)
/* Get the number of consecutive words required to hold pseudo-reg N. */
/* Indexed by N, gives number of CALL_INSNS across which (REG n) is live. */
-#define REG_N_CALLS_CROSSED(N) (VARRAY_REG (reg_n_info, N)->calls_crossed)
+#define REG_N_CALLS_CROSSED(N) \
+ (VEC_index (reg_info_p, reg_n_info, N)->calls_crossed)
+
+/* Indexed by N, gives number of CALL_INSNS that may throw, across which
+ (REG n) is live. */
+
+#define REG_N_THROWING_CALLS_CROSSED(N) \
+ (VEC_index (reg_info_p, reg_n_info, N)->throw_calls_crossed)
/* Total number of instructions at which (REG n) is live.
The larger this is, the less priority (REG n) gets for
is not required. global.c makes an allocno for this but does
not try to assign a hard register to it. */
-#define REG_LIVE_LENGTH(N) (VARRAY_REG (reg_n_info, N)->live_length)
+#define REG_LIVE_LENGTH(N) \
+ (VEC_index (reg_info_p, reg_n_info, N)->live_length)
/* Vector of substitutions of register numbers,
used to map pseudo regs into hardware regs.
extern short *reg_renumber;
-/* Vector indexed by hardware reg
- saying whether that reg is ever used. */
+/* Vector indexed by hardware reg saying whether that reg is ever used. */
extern char regs_ever_live[FIRST_PSEUDO_REGISTER];
-/* Vector indexed by hardware reg giving its name. */
+/* Like regs_ever_live, but saying whether reg is set by asm statements. */
+
+extern char regs_asm_clobbered[FIRST_PSEUDO_REGISTER];
+
+/* Vector indexed by machine mode saying whether there are regs of that mode. */
-extern const char * reg_names[FIRST_PSEUDO_REGISTER];
+extern bool have_regs_of_mode [MAX_MACHINE_MODE];
/* For each hard register, the widest mode object that it can contain.
This will be a MODE_INT mode if the register can hold integers. Otherwise
It is sometimes adjusted for subsequent changes during loop,
but not adjusted by cse even if cse invalidates it. */
-#define REGNO_FIRST_UID(N) (VARRAY_REG (reg_n_info, N)->first_uid)
+#define REGNO_FIRST_UID(N) (VEC_index (reg_info_p, reg_n_info, N)->first_uid)
/* Vector indexed by regno; gives uid of last insn using that reg.
This is computed by reg_scan for use by cse and loop.
but not adjusted by cse even if cse invalidates it.
This is harmless since cse won't scan through a loop end. */
-#define REGNO_LAST_UID(N) (VARRAY_REG (reg_n_info, N)->last_uid)
-
-/* Similar, but includes insns that mention the reg in their notes. */
-
-#define REGNO_LAST_NOTE_UID(N) (VARRAY_REG (reg_n_info, N)->last_note_uid)
+#define REGNO_LAST_UID(N) (VEC_index (reg_info_p, reg_n_info, N)->last_uid)
/* List made of EXPR_LIST rtx's which gives pairs of pseudo registers
that have to go in the same hard reg. */
/* Select a register mode required for caller save of hard regno REGNO. */
#ifndef HARD_REGNO_CALLER_SAVE_MODE
#define HARD_REGNO_CALLER_SAVE_MODE(REGNO, NREGS, MODE) \
- choose_hard_reg_mode (REGNO, NREGS)
+ choose_hard_reg_mode (REGNO, NREGS, false)
#endif
-/* Registers that get partially clobbered by a call in a given mode.
+/* Registers that get partially clobbered by a call in a given mode.
These must not be call used registers. */
#ifndef HARD_REGNO_CALL_PART_CLOBBERED
#define HARD_REGNO_CALL_PART_CLOBBERED(REGNO, MODE) 0
#endif
/* Allocate reg_n_info tables */
-extern void allocate_reg_info PARAMS ((size_t, int, int));
+extern void allocate_reg_info (size_t, int, int);
+
+/* Clear the register information for regno. */
+extern void clear_reg_info_regno (unsigned int);
+
+/* Specify number of hard registers given machine mode occupy. */
+extern unsigned char hard_regno_nregs[FIRST_PSEUDO_REGISTER][MAX_MACHINE_MODE];
+
+#endif /* GCC_REGS_H */