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gcse.c (struct reg_set): Store the block index where the register was set rather than the setting insn. 

* gcse.c (struct reg_set): Store the block index where the register
        was set rather than the setting insn.
        (record_one_set, compute_transp): Corresponding changes.
        (pre_insert_copy_insn): Do not call replace_one_set.
        (replace_one_set): Remove.

From-SVN: r94591
This commit is contained in:
Jeff Law 2005-02-02 08:59:59 -07:00 committed by Jeff Law
parent d02d7104e1
commit ed425871ec
2 changed files with 13 additions and 25 deletions
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8
gcc/ChangeLog
View File

@ -1,3 +1,11 @@
2005-02-02 Jeff Law <law@redhat.com>
* gcse.c (struct reg_set): Store the block index where the register
was set rather than the setting insn.
(record_one_set, compute_transp): Corresponding changes.
(pre_insert_copy_insn): Do not call replace_one_set.
(replace_one_set): Remove.
2005-02-02 Joseph S. Myers <joseph@codesourcery.com>
PR other/15514

30
gcc/gcse.c
View File

@ -436,8 +436,8 @@ typedef struct reg_set
{
/* The next setting of this register. */
struct reg_set *next;
/* The insn where it was set. */
rtx insn;
/* The index of the block where it was set. */
int bb_index;
} reg_set;
static reg_set **reg_set_table;
@ -535,7 +535,6 @@ static void free_gcse_mem (void);
static void alloc_reg_set_mem (int);
static void free_reg_set_mem (void);
static void record_one_set (int, rtx);
static void replace_one_set (int, rtx, rtx);
static void record_set_info (rtx, rtx, void *);
static void compute_sets (rtx);
static void hash_scan_insn (rtx, struct hash_table *, int);
@ -1104,24 +1103,6 @@ free_reg_set_mem (void)
obstack_free (&reg_set_obstack, NULL);
}
/* An OLD_INSN that used to set REGNO was replaced by NEW_INSN.
Update the corresponding `reg_set_table' entry accordingly.
We assume that NEW_INSN is not already recorded in reg_set_table[regno]. */
static void
replace_one_set (int regno, rtx old_insn, rtx new_insn)
{
struct reg_set *reg_info;
if (regno >= reg_set_table_size)
return;
for (reg_info = reg_set_table[regno]; reg_info; reg_info = reg_info->next)
if (reg_info->insn == old_insn)
{
reg_info->insn = new_insn;
break;
}
}
/* Record REGNO in the reg_set table. */
static void
@ -1144,7 +1125,7 @@ record_one_set (int regno, rtx insn)
new_reg_info = obstack_alloc (&reg_set_obstack, sizeof (struct reg_set));
bytes_used += sizeof (struct reg_set);
new_reg_info->insn = insn;
new_reg_info->bb_index = BLOCK_NUM (insn);
new_reg_info->next = reg_set_table[regno];
reg_set_table[regno] = new_reg_info;
}
@ -2468,7 +2449,7 @@ compute_transp (rtx x, int indx, sbitmap *bmap, int set_p)
else
{
for (r = reg_set_table[REGNO (x)]; r != NULL; r = r->next)
SET_BIT (bmap[BLOCK_NUM (r->insn)], indx);
SET_BIT (bmap[r->bb_index], indx);
}
}
else
@ -2482,7 +2463,7 @@ compute_transp (rtx x, int indx, sbitmap *bmap, int set_p)
else
{
for (r = reg_set_table[REGNO (x)]; r != NULL; r = r->next)
RESET_BIT (bmap[BLOCK_NUM (r->insn)], indx);
RESET_BIT (bmap[r->bb_index], indx);
}
}
@ -4260,7 +4241,6 @@ pre_insert_copy_insn (struct expr *expr, rtx insn)
new_insn = emit_insn_after (new_insn, insn);
/* Keep register set table up to date. */
replace_one_set (REGNO (old_reg), insn, new_insn);
record_one_set (regno, insn);
}
else