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gcse.c (blocks_with_calls): New bitmap.

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* gcse.c (blocks_with_calls): New bitmap.
	(alloc_gcse_mem): Allocate it.
	(free_gcse_mem): Free it.
	(clear_modifY_mem_tables): Clear it.
	(record_last_mem_set_info): Set the proper bit in BLOCK_WITH_CALLS
	when we encounter CALL_INSNs.
	(compute_transp, case MEM): Handle blocks with calls separate
	from blocks without calls.  Use bitmap iterators rather than
	FOR_EACH_BB.

From-SVN: r95097
This commit is contained in:
Jeff Law 2005-02-15 23:14:13 -07:00 committed by Jeff Law
parent 489ce9e7ab
commit aa47fcfa21
2 changed files with 61 additions and 31 deletions
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12
gcc/ChangeLog
View File

@ -1,3 +1,15 @@
2005-02-15 Jeff Law <law@redhat.com>
* gcse.c (blocks_with_calls): New bitmap.
(alloc_gcse_mem): Allocate it.
(free_gcse_mem): Free it.
(clear_modifY_mem_tables): Clear it.
(record_last_mem_set_info): Set the proper bit in BLOCK_WITH_CALLS
when we encounter CALL_INSNs.
(compute_transp, case MEM): Handle blocks with calls separate
from blocks without calls. Use bitmap iterators rather than
FOR_EACH_BB.
2005-02-15 Peter O'Gorman <peter@pogma.com>
PR bootstrap/18810

80
gcc/gcse.c
View File

@ -501,6 +501,10 @@ static bitmap modify_mem_list_set;
/* This array parallels modify_mem_list, but is kept canonicalized. */
static rtx * canon_modify_mem_list;
/* Bitmap indexed by block numbers to record which blocks contain
function calls. */
static bitmap blocks_with_calls;
/* Various variables for statistics gathering. */
/* Memory used in a pass.
@ -967,6 +971,7 @@ alloc_gcse_mem (rtx f)
modify_mem_list = gcalloc (last_basic_block, sizeof (rtx));
canon_modify_mem_list = gcalloc (last_basic_block, sizeof (rtx));
modify_mem_list_set = BITMAP_XMALLOC ();
blocks_with_calls = BITMAP_XMALLOC ();
}
/* Free memory allocated by alloc_gcse_mem. */
@ -982,6 +987,7 @@ free_gcse_mem (void)
sbitmap_vector_free (reg_set_in_block);
free_modify_mem_tables ();
BITMAP_XFREE (modify_mem_list_set);
BITMAP_XFREE (blocks_with_calls);
}
/* Compute the local properties of each recorded expression.
@ -1971,6 +1977,7 @@ record_last_mem_set_info (rtx insn)
need to insert a pair of items, as canon_list_insert does. */
canon_modify_mem_list[bb] =
alloc_INSN_LIST (insn, canon_modify_mem_list[bb]);
bitmap_set_bit (blocks_with_calls, bb);
}
else
note_stores (PATTERN (insn), canon_list_insert, (void*) insn);
@ -2197,6 +2204,7 @@ clear_modify_mem_tables (void)
free_insn_expr_list_list (canon_modify_mem_list + i);
}
bitmap_clear (modify_mem_list_set);
bitmap_clear (blocks_with_calls);
}
/* Release memory used by modify_mem_list_set. */
@ -2460,41 +2468,51 @@ compute_transp (rtx x, int indx, sbitmap *bmap, int set_p)
return;
case MEM:
FOR_EACH_BB (bb)
{
rtx list_entry = canon_modify_mem_list[bb->index];
{
bitmap_iterator bi;
unsigned bb_index;
while (list_entry)
{
rtx dest, dest_addr;
/* First handle all the blocks with calls. We don't need to
do any list walking for them. */
EXECUTE_IF_SET_IN_BITMAP (blocks_with_calls, 0, bb_index, bi)
{
if (set_p)
SET_BIT (bmap[bb_index], indx);
else
RESET_BIT (bmap[bb_index], indx);
}
if (CALL_P (XEXP (list_entry, 0)))
{
if (set_p)
SET_BIT (bmap[bb->index], indx);
else
RESET_BIT (bmap[bb->index], indx);
break;
}
/* LIST_ENTRY must be an INSN of some kind that sets memory.
Examine each hunk of memory that is modified. */
/* Now iterate over the blocks which have memory modifications
but which do not have any calls. */
EXECUTE_IF_AND_COMPL_IN_BITMAP (modify_mem_list_set, blocks_with_calls,
0, bb_index, bi)
{
rtx list_entry = canon_modify_mem_list[bb_index];
dest = XEXP (list_entry, 0);
list_entry = XEXP (list_entry, 1);
dest_addr = XEXP (list_entry, 0);
while (list_entry)
{
rtx dest, dest_addr;
if (canon_true_dependence (dest, GET_MODE (dest), dest_addr,
x, rtx_addr_varies_p))
{
if (set_p)
SET_BIT (bmap[bb->index], indx);
else
RESET_BIT (bmap[bb->index], indx);
break;
}
list_entry = XEXP (list_entry, 1);
}
}
/* LIST_ENTRY must be an INSN of some kind that sets memory.
Examine each hunk of memory that is modified. */
dest = XEXP (list_entry, 0);
list_entry = XEXP (list_entry, 1);
dest_addr = XEXP (list_entry, 0);
if (canon_true_dependence (dest, GET_MODE (dest), dest_addr,
x, rtx_addr_varies_p))
{
if (set_p)
SET_BIT (bmap[bb_index], indx);
else
RESET_BIT (bmap[bb_index], indx);
break;
}
list_entry = XEXP (list_entry, 1);
}
}
}
x = XEXP (x, 0);
goto repeat;