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reload.c (copy_replacements_1): New.

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* reload.c (copy_replacements_1): New.
        (copy_replacements): Use it to recurse through the rtx.

From-SVN: r50552
This commit is contained in:
Richard Henderson 2002-03-10 15:51:08 -08:00 committed by Richard Henderson
parent a10e3b428c
commit 561c9153eb
2 changed files with 59 additions and 32 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2002-03-10 Richard Henderson <rth@redhat.com>
* reload.c (copy_replacements_1): New.
(copy_replacements): Use it to recurse through the rtx.
2002-03-10 Richard Henderson <rth@redhat.com>
* loop.c (strength_reduce): Compute number of iterations as

86
gcc/reload.c
View File

@ -266,8 +266,9 @@ static int find_reloads_address_1 PARAMS ((enum machine_mode, rtx, int, rtx *,
static void find_reloads_address_part PARAMS ((rtx, rtx *, enum reg_class,
enum machine_mode, int,
enum reload_type, int));
static rtx find_reloads_subreg_address PARAMS ((rtx, int, int, enum reload_type,
int, rtx));
static rtx find_reloads_subreg_address PARAMS ((rtx, int, int,
enum reload_type, int, rtx));
static void copy_replacements_1 PARAMS ((rtx *, rtx *, int));
static int find_inc_amount PARAMS ((rtx, rtx));
#ifdef HAVE_SECONDARY_RELOADS
@ -5888,46 +5889,67 @@ subst_reloads (insn)
}
}
/* Make a copy of any replacements being done into X and move those copies
to locations in Y, a copy of X. We only look at the highest level of
the RTL. */
/* Make a copy of any replacements being done into X and move those
copies to locations in Y, a copy of X. */
void
copy_replacements (x, y)
rtx x;
rtx y;
rtx x, y;
{
int i, j;
enum rtx_code code = GET_CODE (x);
const char *fmt = GET_RTX_FORMAT (code);
struct replacement *r;
/* We can't support X being a SUBREG because we might then need to know its
location if something inside it was replaced. */
if (code == SUBREG)
if (GET_CODE (x) == SUBREG)
abort ();
for (i = GET_RTX_LENGTH (code) - 1; i >= 0; i--)
if (fmt[i] == 'e')
for (j = 0; j < n_replacements; j++)
copy_replacements_1 (&x, &y, n_replacements);
}
static void
copy_replacements_1 (px, py, orig_replacements)
rtx *px;
rtx *py;
int orig_replacements;
{
int i, j;
rtx x, y;
struct replacement *r;
enum rtx_code code;
const char *fmt;
for (j = 0; j < orig_replacements; j++)
{
if (replacements[j].subreg_loc == px)
{
if (replacements[j].subreg_loc == &XEXP (x, i))
{
r = &replacements[n_replacements++];
r->where = replacements[j].where;
r->subreg_loc = &XEXP (y, i);
r->what = replacements[j].what;
r->mode = replacements[j].mode;
}
else if (replacements[j].where == &XEXP (x, i))
{
r = &replacements[n_replacements++];
r->where = &XEXP (y, i);
r->subreg_loc = 0;
r->what = replacements[j].what;
r->mode = replacements[j].mode;
}
r = &replacements[n_replacements++];
r->where = replacements[j].where;
r->subreg_loc = py;
r->what = replacements[j].what;
r->mode = replacements[j].mode;
}
else if (replacements[j].where == px)
{
r = &replacements[n_replacements++];
r->where = py;
r->subreg_loc = 0;
r->what = replacements[j].what;
r->mode = replacements[j].mode;
}
}
x = *px;
y = *py;
code = GET_CODE (x);
fmt = GET_RTX_FORMAT (code);
for (i = GET_RTX_LENGTH (code) - 1; i >= 0; i--)
{
if (fmt[i] == 'e')
copy_replacements_1 (&XEXP (x, i), &XEXP (y, i), orig_replacements);
else if (fmt[i] == 'E')
for (j = XVECLEN (x, i); --j >= 0; )
copy_replacements_1 (&XVECEXP (x, i, j), &XVECEXP (y, i, j),
orig_replacements);
}
}
/* Change any replacements being done to *X to be done to *Y */