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mode-switching: Remove unused bbnum field

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seginfo had an unused bbnum field, presumably dating from before
BB information was attached directly to insns.

gcc/
	* mode-switching.cc: Remove unused forward references.
	(seginfo): Remove bbnum.
	(new_seginfo): Remove associated argument.
	(optimize_mode_switching): Update calls accordingly.
This commit is contained in:
Richard Sandiford 2023-11-05 18:28:46 +00:00
parent 5bd1d54847
commit 2d55ed2b8a
1 changed files with 5 additions and 13 deletions
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18
gcc/mode-switching.cc
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@ -65,13 +65,11 @@ along with GCC; see the file COPYING3. If not see
MODE is the mode this insn must be executed in.
INSN_PTR is the insn to be executed (may be the note that marks the
beginning of a basic block).
BBNUM is the flow graph basic block this insn occurs in.
NEXT is the next insn in the same basic block. */
struct seginfo
{
int mode;
rtx_insn *insn_ptr;
int bbnum;
struct seginfo *next;
HARD_REG_SET regs_live;
};
@ -84,11 +82,6 @@ struct bb_info
int mode_in;
};
static struct seginfo * new_seginfo (int, rtx_insn *, int, HARD_REG_SET);
static void add_seginfo (struct bb_info *, struct seginfo *);
static void reg_dies (rtx, HARD_REG_SET *);
static void reg_becomes_live (rtx, const_rtx, void *);
/* Clear ode I from entity J in bitmap B. */
#define clear_mode_bit(b, j, i) \
bitmap_clear_bit (b, (j * max_num_modes) + i)
@ -148,13 +141,13 @@ commit_mode_sets (struct edge_list *edge_list, int e, struct bb_info *info)
}
/* Allocate a new BBINFO structure, initialized with the MODE, INSN,
and basic block BB parameters.
and REGS_LIVE parameters.
INSN may not be a NOTE_INSN_BASIC_BLOCK, unless it is an empty
basic block; that allows us later to insert instructions in a FIFO-like
manner. */
static struct seginfo *
new_seginfo (int mode, rtx_insn *insn, int bb, HARD_REG_SET regs_live)
new_seginfo (int mode, rtx_insn *insn, const HARD_REG_SET &regs_live)
{
struct seginfo *ptr;
@ -163,7 +156,6 @@ new_seginfo (int mode, rtx_insn *insn, int bb, HARD_REG_SET regs_live)
ptr = XNEW (struct seginfo);
ptr->mode = mode;
ptr->insn_ptr = insn;
ptr->bbnum = bb;
ptr->next = NULL;
ptr->regs_live = regs_live;
return ptr;
@ -605,7 +597,7 @@ optimize_mode_switching (void)
gcc_assert (NOTE_INSN_BASIC_BLOCK_P (ins_pos));
if (ins_pos != BB_END (bb))
ins_pos = NEXT_INSN (ins_pos);
ptr = new_seginfo (no_mode, ins_pos, bb->index, live_now);
ptr = new_seginfo (no_mode, ins_pos, live_now);
add_seginfo (info + bb->index, ptr);
for (i = 0; i < no_mode; i++)
clear_mode_bit (transp[bb->index], j, i);
@ -623,7 +615,7 @@ optimize_mode_switching (void)
{
any_set_required = true;
last_mode = mode;
ptr = new_seginfo (mode, insn, bb->index, live_now);
ptr = new_seginfo (mode, insn, live_now);
add_seginfo (info + bb->index, ptr);
for (i = 0; i < no_mode; i++)
clear_mode_bit (transp[bb->index], j, i);
@ -652,7 +644,7 @@ optimize_mode_switching (void)
mark the block as nontransparent. */
if (!any_set_required)
{
ptr = new_seginfo (no_mode, BB_END (bb), bb->index, live_now);
ptr = new_seginfo (no_mode, BB_END (bb), live_now);
add_seginfo (info + bb->index, ptr);
if (last_mode != no_mode)
for (i = 0; i < no_mode; i++)