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regrename.c (kill_value_regno): Simplify chain removal. 

* regrename.c (kill_value_regno): Simplify chain removal.
        (kill_value): Kill all of HARD_REGNO_NREGS.
        (kill_set_value): Use kill_value not kill_value_regno.
        (kill_autoinc_value): Likewise.
        (copyprop_hardreg_forward): Don't collect refresh_blocks.
        Call delete_noop_moves.

From-SVN: r47992
This commit is contained in:
Richard Henderson 2001-12-13 22:47:56 -08:00 committed by Richard Henderson
parent c178fe8964
commit 3de237276c
2 changed files with 33 additions and 29 deletions
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9
gcc/ChangeLog
View File

@ -1,3 +1,12 @@
2001-12-13 Richard Henderson <rth@redhat.com>
* regrename.c (kill_value_regno): Simplify chain removal.
(kill_value): Kill all of HARD_REGNO_NREGS.
(kill_set_value): Use kill_value not kill_value_regno.
(kill_autoinc_value): Likewise.
(copyprop_hardreg_forward): Don't collect refresh_blocks.
Call delete_noop_moves.
2001-12-13 Aldy Hernandez <aldyh@redhat.com>
* attribs.c (c_common_attribute_table): Swap decl_req and type_req

53
gcc/regrename.c
View File

@ -1025,16 +1025,7 @@ kill_value_regno (regno, vd)
vd->e[i].next_regno != regno;
i = vd->e[i].next_regno)
continue;
next = vd->e[regno].next_regno;
while (1)
{
vd->e[i].next_regno = next;
if (next == INVALID_REGNUM)
break;
i = next;
next = vd->e[next].next_regno;
}
vd->e[i].next_regno = vd->e[regno].next_regno;
}
else if ((next = vd->e[regno].next_regno) != INVALID_REGNUM)
{
@ -1052,7 +1043,7 @@ kill_value_regno (regno, vd)
}
/* Kill X. This is a convenience function for kill_value_regno
so that we don't have to check that X is a register first. */
so that we mind the mode the register is in. */
static void
kill_value (x, vd)
@ -1060,7 +1051,14 @@ kill_value (x, vd)
struct value_data *vd;
{
if (REG_P (x))
kill_value_regno (REGNO (x), vd);
{
unsigned int regno = REGNO (x);
unsigned int n = HARD_REGNO_NREGS (regno, GET_MODE (x));
unsigned int i;
for (i = 0; i < n; ++i)
kill_value_regno (regno + i, vd);
}
}
/* Initialize VD such that there are no known relationships between regs. */
@ -1103,9 +1101,8 @@ kill_set_value (x, set, data)
struct value_data *vd = data;
if (GET_CODE (set) != CLOBBER && REG_P (x))
{
unsigned int regno = REGNO (x);
kill_value_regno (regno, vd);
vd->e[regno].mode = GET_MODE (x);
kill_value (x, vd);
vd->e[REGNO (x)].mode = GET_MODE (x);
}
}
@ -1123,9 +1120,9 @@ kill_autoinc_value (px, data)
if (GET_RTX_CLASS (GET_CODE (x)) == 'a')
{
unsigned int regno = REGNO (XEXP (x, 0));
kill_value_regno (regno, vd);
vd->e[regno].mode = Pmode;
x = XEXP (x, 0);
kill_value (x, vd);
vd->e[REGNO (x)].mode = Pmode;
return -1;
}
@ -1547,13 +1544,11 @@ copyprop_hardreg_forward_1 (bb, vd)
void
copyprop_hardreg_forward ()
{
int b, need_refresh;
sbitmap refresh_blocks;
struct value_data *all_vd;
bool need_refresh;
int b;
refresh_blocks = sbitmap_alloc (n_basic_blocks);
sbitmap_zero (refresh_blocks);
need_refresh = 0;
need_refresh = false;
all_vd = xmalloc (sizeof (struct value_data) * n_basic_blocks);
@ -1574,10 +1569,7 @@ copyprop_hardreg_forward ()
init_value_data (all_vd + b);
if (copyprop_hardreg_forward_1 (bb, all_vd + b))
{
SET_BIT (refresh_blocks, b);
need_refresh = 1;
}
need_refresh = true;
}
if (need_refresh)
@ -1585,13 +1577,16 @@ copyprop_hardreg_forward ()
if (rtl_dump_file)
fputs ("\n\n", rtl_dump_file);
update_life_info (refresh_blocks, UPDATE_LIFE_GLOBAL_RM_NOTES,
/* ??? Irritatingly, delete_noop_moves does not take a set of blocks
to scan, so we have to do a life update with no initial set of
blocks Just In Case. */
delete_noop_moves (get_insns ());
update_life_info (NULL, UPDATE_LIFE_GLOBAL_RM_NOTES,
PROP_DEATH_NOTES
| PROP_SCAN_DEAD_CODE
| PROP_KILL_DEAD_CODE);
}
sbitmap_free (refresh_blocks);
free (all_vd);
}