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regmove.c (copy_src_to_dest): Remove loop_depth parameter.

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* regmove.c (copy_src_to_dest): Remove loop_depth parameter.
	(optimize_reg_copy_1): Remove REG_N_REFS updating code.
	(optimize_reg_copy_2, copy_src_to_dest, fixup_match_2): Likewise.
	(regmove_optimize, fixup_match_1): Likewise.

From-SVN: r30774
This commit is contained in:
Jan Hubicka 1999-12-04 14:21:53 +01:00 committed by Jan Hubicka
parent b760c4b147
commit 1b7c4a3727
2 changed files with 14 additions and 91 deletions
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7
gcc/ChangeLog
View File

@ -1,3 +1,10 @@
Sat Dec 4 14:13:38 MET 1999 Jan Hubicka <hubicka@freesoft.cz>
* regmove.c (copy_src_to_dest): Remove loop_depth parameter.
(optimize_reg_copy_1): Remove REG_N_REFS updating code.
(optimize_reg_copy_2, copy_src_to_dest, fixup_match_2): Likewise.
(regmove_optimize, fixup_match_1): Likewise.
1999-12-05 Michael Hayes <m.hayes@elec.canterbury.ac.nz>
* flow.c (flow_loops_dump): Add missing argument when calling

98
gcc/regmove.c
View File

@ -45,7 +45,7 @@ static int optimize_reg_copy_1 PROTO((rtx, rtx, rtx));
static void optimize_reg_copy_2 PROTO((rtx, rtx, rtx));
static void optimize_reg_copy_3 PROTO((rtx, rtx, rtx));
static rtx gen_add3_insn PROTO((rtx, rtx, rtx));
static void copy_src_to_dest PROTO((rtx, rtx, rtx, int, int));
static void copy_src_to_dest PROTO((rtx, rtx, rtx, int));
static int *regmove_bb_head;
struct match {
@ -68,7 +68,6 @@ static int stable_and_no_regs_but_for_p PROTO((rtx, rtx, rtx));
static int regclass_compatible_p PROTO((int, int));
static int replacement_quality PROTO((rtx));
static int fixup_match_2 PROTO((rtx, rtx, rtx, rtx, FILE *));
static int loop_depth;
/* Return non-zero if registers with CLASS1 and CLASS2 can be merged without
causing too much register allocation problems. */
@ -465,20 +464,7 @@ optimize_reg_copy_1 (insn, dest, src)
&& (sregno >= FIRST_PSEUDO_REGISTER
|| ! reg_overlap_mentioned_p (src,
PATTERN (q))))
{
/* We assume that a register is used exactly once per
insn in the REG_N_REFS updates below. If this is not
correct, no great harm is done.
Since we do not know if we will change the lifetime of
SREGNO or DREGNO, we must not update REG_LIVE_LENGTH
or REG_N_CALLS_CROSSED at this time. */
if (sregno >= FIRST_PSEUDO_REGISTER)
REG_N_REFS (sregno) -= loop_depth;
if (dregno >= FIRST_PSEUDO_REGISTER)
REG_N_REFS (dregno) += loop_depth;
}
;
else
{
validate_replace_rtx (dest, src, q);
@ -626,15 +612,7 @@ optimize_reg_copy_2 (insn, dest, src)
if (GET_RTX_CLASS (GET_CODE (q)) == 'i')
{
if (reg_mentioned_p (dest, PATTERN (q)))
{
PATTERN (q) = replace_rtx (PATTERN (q), dest, src);
/* We assume that a register is used exactly once per
insn in the updates below. If this is not correct,
no great harm is done. */
REG_N_REFS (dregno) -= loop_depth;
REG_N_REFS (sregno) += loop_depth;
}
PATTERN (q) = replace_rtx (PATTERN (q), dest, src);
if (GET_CODE (q) == CALL_INSN)
@ -755,11 +733,10 @@ optimize_reg_copy_3 (insn, dest, src)
instead moving the value to dest directly before the operation. */
static void
copy_src_to_dest (insn, src, dest, loop_depth, old_max_uid)
copy_src_to_dest (insn, src, dest, old_max_uid)
rtx insn;
rtx src;
rtx dest;
int loop_depth;
int old_max_uid;
{
rtx seq;
@ -844,8 +821,7 @@ copy_src_to_dest (insn, src, dest, loop_depth, old_max_uid)
/* Update the various register tables. */
dest_regno = REGNO (dest);
REG_N_SETS (dest_regno) += loop_depth;
REG_N_REFS (dest_regno) += loop_depth;
REG_N_SETS (dest_regno) ++;
REG_LIVE_LENGTH (dest_regno)++;
if (REGNO_FIRST_UID (dest_regno) == insn_uid)
REGNO_FIRST_UID (dest_regno) = move_uid;
@ -1007,9 +983,6 @@ fixup_match_2 (insn, dst, src, offset, regmove_dump_file)
REG_N_CALLS_CROSSED (REGNO (dst)) += num_calls;
}
REG_N_REFS (REGNO (dst)) += loop_depth;
REG_N_REFS (REGNO (src)) -= loop_depth;
if (regmove_dump_file)
fprintf (regmove_dump_file,
"Fixed operand of insn %d.\n",
@ -1109,8 +1082,6 @@ regmove_optimize (f, nregs, regmove_dump_file)
/* A forward/backward pass. Replace output operands with input operands. */
loop_depth = 1;
for (pass = 0; pass <= 2; pass++)
{
if (! flag_regmove && pass >= flag_expensive_optimizations)
@ -1126,14 +1097,6 @@ regmove_optimize (f, nregs, regmove_dump_file)
rtx set;
int op_no, match_no;
if (GET_CODE (insn) == NOTE)
{
if (NOTE_LINE_NUMBER (insn) == NOTE_INSN_LOOP_BEG)
loop_depth++;
else if (NOTE_LINE_NUMBER (insn) == NOTE_INSN_LOOP_END)
loop_depth--;
}
set = single_set (insn);
if (! set)
continue;
@ -1269,17 +1232,8 @@ regmove_optimize (f, nregs, regmove_dump_file)
if (regmove_dump_file)
fprintf (regmove_dump_file, "Starting backward pass...\n");
loop_depth = 1;
for (insn = get_last_insn (); insn; insn = PREV_INSN (insn))
{
if (GET_CODE (insn) == NOTE)
{
if (NOTE_LINE_NUMBER (insn) == NOTE_INSN_LOOP_END)
loop_depth++;
else if (NOTE_LINE_NUMBER (insn) == NOTE_INSN_LOOP_BEG)
loop_depth--;
}
if (GET_RTX_CLASS (GET_CODE (insn)) == 'i')
{
int op_no, match_no;
@ -1528,22 +1482,6 @@ regmove_optimize (f, nregs, regmove_dump_file)
REG_LIVE_LENGTH (srcno) = 2;
}
/* We assume that a register is used exactly once per
insn in the updates above. If this is not correct,
no great harm is done. */
REG_N_REFS (dstno) += 2 * loop_depth;
REG_N_REFS (srcno) -= 2 * loop_depth;
/* If that was the only time src was set,
and src was not live at the start of the
function, we know that we have no more
references to src; clear REG_N_REFS so it
won't make reload do any work. */
if (REG_N_SETS (REGNO (src)) == 0
&& ! regno_uninitialized (REGNO (src)))
REG_N_REFS (REGNO (src)) = 0;
if (regmove_dump_file)
fprintf (regmove_dump_file,
"Fixed operand %d of insn %d matching operand %d.\n",
@ -1556,8 +1494,7 @@ regmove_optimize (f, nregs, regmove_dump_file)
/* If we weren't able to replace any of the alternatives, try an
alternative appoach of copying the source to the destination. */
if (!success && copy_src != NULL_RTX)
copy_src_to_dest (insn, copy_src, copy_dst, loop_depth,
old_max_uid);
copy_src_to_dest (insn, copy_src, copy_dst, old_max_uid);
}
}
@ -1683,7 +1620,7 @@ fixup_match_1 (insn, set, src, src_subreg, dst, backward, operand_number,
HOST_WIDE_INT insn_const, newconst;
rtx overlap = 0; /* need to move insn ? */
rtx src_note = find_reg_note (insn, REG_DEAD, src), dst_note;
int length, s_length, true_loop_depth;
int length, s_length;
/* If SRC is marked as unchanging, we may not change it.
??? Maybe we could get better code by removing the unchanging bit
@ -1905,8 +1842,6 @@ fixup_match_1 (insn, set, src, src_subreg, dst, backward, operand_number,
if (! success)
return 0;
true_loop_depth = backward ? 2 - loop_depth : loop_depth;
/* Remove the death note for DST from P. */
remove_note (p, dst_note);
if (code == MINUS)
@ -1918,7 +1853,6 @@ fixup_match_1 (insn, set, src, src_subreg, dst, backward, operand_number,
post_inc = 0;
validate_change (insn, &XEXP (SET_SRC (set), 1), GEN_INT (insn_const), 0);
REG_N_SETS (REGNO (src))++;
REG_N_REFS (REGNO (src)) += true_loop_depth;
REG_LIVE_LENGTH (REGNO (src))++;
}
if (overlap)
@ -2010,7 +1944,6 @@ fixup_match_1 (insn, set, src, src_subreg, dst, backward, operand_number,
NOTE_SOURCE_FILE (q) = 0;
REG_N_SETS (REGNO (src))--;
REG_N_CALLS_CROSSED (REGNO (src)) -= num_calls2;
REG_N_REFS (REGNO (src)) -= true_loop_depth;
REG_LIVE_LENGTH (REGNO (src)) -= s_length2;
insn_const = 0;
}
@ -2104,23 +2037,6 @@ fixup_match_1 (insn, set, src, src_subreg, dst, backward, operand_number,
if (REG_LIVE_LENGTH (REGNO (dst)) < 2)
REG_LIVE_LENGTH (REGNO (dst)) = 2;
}
/* We assume that a register is used exactly once per
insn in the updates above. If this is not correct,
no great harm is done. */
REG_N_REFS (REGNO (src)) += 2 * true_loop_depth;
REG_N_REFS (REGNO (dst)) -= 2 * true_loop_depth;
/* If that was the only time dst was set,
and dst was not live at the start of the
function, we know that we have no more
references to dst; clear REG_N_REFS so it
won't make reload do any work. */
if (REG_N_SETS (REGNO (dst)) == 0
&& ! regno_uninitialized (REGNO (dst)))
REG_N_REFS (REGNO (dst)) = 0;
if (regmove_dump_file)
fprintf (regmove_dump_file,
"Fixed operand %d of insn %d matching operand %d.\n",