/* Try to unroll loops, and split induction variables.
- Copyright (C) 1992, 93-95, 97-99, 2000 Free Software Foundation, Inc.
+ Copyright (C) 1992, 1993, 1994, 1995, 1997, 1998,
+ 1999, 2000 Free Software Foundation, Inc.
Contributed by James E. Wilson, Cygnus Support/UC Berkeley.
This file is part of GNU CC.
/* Forward declarations. */
static void init_reg_map PARAMS ((struct inline_remap *, int));
-static rtx calculate_giv_inc PARAMS ((rtx, rtx, int));
+static rtx calculate_giv_inc PARAMS ((rtx, rtx, unsigned int));
static rtx initial_reg_note_copy PARAMS ((rtx, struct inline_remap *));
static void final_reg_note_copy PARAMS ((rtx, struct inline_remap *));
static void copy_loop_body PARAMS ((rtx, rtx, struct inline_remap *, rtx, int,
int strength_reduce_p;
{
int i, j;
+ unsigned int r;
unsigned HOST_WIDE_INT temp;
- int unroll_number;
+ int unroll_number = 1;
rtx copy_start, copy_end;
rtx insn, sequence, pattern, tem;
int max_labelno, max_insnno;
struct inline_remap *map;
char *local_label = NULL;
char *local_regno;
- int max_local_regnum;
- int maxregnum;
+ unsigned int max_local_regnum;
+ unsigned int maxregnum;
rtx exit_label = 0;
rtx start_label;
struct iv_class *bl;
results in better code. */
/* We must limit the generic test to max_reg_before_loop, because only
these pseudo registers have valid regno_first_uid info. */
- for (j = FIRST_PSEUDO_REGISTER; j < max_reg_before_loop; ++j)
- if (REGNO_FIRST_UID (j) > 0 && REGNO_FIRST_UID (j) <= max_uid_for_loop
- && uid_luid[REGNO_FIRST_UID (j)] >= copy_start_luid
- && REGNO_LAST_UID (j) > 0 && REGNO_LAST_UID (j) <= max_uid_for_loop
- && uid_luid[REGNO_LAST_UID (j)] <= copy_end_luid)
+ for (r = FIRST_PSEUDO_REGISTER; r < max_reg_before_loop; ++r)
+ if (REGNO_FIRST_UID (r) > 0 && REGNO_FIRST_UID (r) <= max_uid_for_loop
+ && uid_luid[REGNO_FIRST_UID (r)] >= copy_start_luid
+ && REGNO_LAST_UID (r) > 0 && REGNO_LAST_UID (r) <= max_uid_for_loop
+ && uid_luid[REGNO_LAST_UID (r)] <= copy_end_luid)
{
/* However, we must also check for loop-carried dependencies.
If the value the pseudo has at the end of iteration X is
regno_last_uid. */
/* ??? This check is simplistic. We would get better code if
this check was more sophisticated. */
- if (set_dominates_use (j, REGNO_FIRST_UID (j), REGNO_LAST_UID (j),
+ if (set_dominates_use (r, REGNO_FIRST_UID (r), REGNO_LAST_UID (r),
copy_start, copy_end))
- local_regno[j] = 1;
+ local_regno[r] = 1;
if (loop_dump_stream)
{
- if (local_regno[j])
- fprintf (loop_dump_stream, "Marked reg %d as local\n", j);
+ if (local_regno[r])
+ fprintf (loop_dump_stream, "Marked reg %d as local\n", r);
else
fprintf (loop_dump_stream, "Did not mark reg %d as local\n",
- j);
+ r);
}
}
/* Givs that have been created from multiple biv increments always have
local registers. */
- for (j = first_increment_giv; j <= last_increment_giv; j++)
+ for (r = first_increment_giv; r <= last_increment_giv; r++)
{
- local_regno[j] = 1;
+ local_regno[r] = 1;
if (loop_dump_stream)
- fprintf (loop_dump_stream, "Marked reg %d as local\n", j);
+ fprintf (loop_dump_stream, "Marked reg %d as local\n", r);
}
}
if (local_label[j])
set_label_in_map (map, j, gen_label_rtx ());
- for (j = FIRST_PSEUDO_REGISTER; j < max_local_regnum; j++)
- if (local_regno[j])
+ for (r = FIRST_PSEUDO_REGISTER; r < max_local_regnum; r++)
+ if (local_regno[r])
{
- map->reg_map[j] = gen_reg_rtx (GET_MODE (regno_reg_rtx[j]));
- record_base_value (REGNO (map->reg_map[j]),
- regno_reg_rtx[j], 0);
+ map->reg_map[r]
+ = gen_reg_rtx (GET_MODE (regno_reg_rtx[r]));
+ record_base_value (REGNO (map->reg_map[r]),
+ regno_reg_rtx[r], 0);
}
/* The last copy needs the compare/branch insns at the end,
so reset copy_end here if the loop ends with a conditional
if (local_label[j])
set_label_in_map (map, j, gen_label_rtx ());
- for (j = FIRST_PSEUDO_REGISTER; j < max_local_regnum; j++)
- if (local_regno[j])
+ for (r = FIRST_PSEUDO_REGISTER; r < max_local_regnum; r++)
+ if (local_regno[r])
{
- map->reg_map[j] = gen_reg_rtx (GET_MODE (regno_reg_rtx[j]));
- record_base_value (REGNO (map->reg_map[j]),
- regno_reg_rtx[j], 0);
+ map->reg_map[r] = gen_reg_rtx (GET_MODE (regno_reg_rtx[r]));
+ record_base_value (REGNO (map->reg_map[r]),
+ regno_reg_rtx[r], 0);
}
/* If loop starts with a branch to the test, then fix it so that
static rtx
calculate_giv_inc (pattern, src_insn, regno)
rtx pattern, src_insn;
- int regno;
+ unsigned int regno;
{
rtx increment;
rtx increment_total = 0;
{
struct iv_class *bl;
struct induction *v, *tv;
- int regno = REGNO (SET_DEST (set));
+ unsigned int regno = REGNO (SET_DEST (set));
v = addr_combined_regs[REGNO (SET_DEST (set))];
bl = reg_biv_class[REGNO (v->src_reg)];
&& GET_CODE (SET_DEST (set)) == REG
&& splittable_regs[REGNO (SET_DEST (set))])
{
- int regno = REGNO (SET_DEST (set));
- int src_regno;
+ unsigned int regno = REGNO (SET_DEST (set));
+ unsigned int src_regno;
dest_reg_was_split = 1;
OSDN Git Service
