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re PR rtl-optimization/49114 ([x32] Reload failed to handle (set reg:X (plus:X (subreg:X (reg:Y) 0) (const_int)))) 

PR rtl-optimization/49114
	* reload.c (struct replacement): Remove SUBREG_LOC member.
	(push_reload): Do not set it.
	(push_replacement): Likewise.
	(subst_reload): Remove dead code.
	(copy_replacements): Remove assertion.
	(copy_replacements_1): Do not handle SUBREG_LOC.
	(move_replacements): Likewise.
	(find_replacement): Remove dead code.  Use reload_adjust_reg_for_mode.
	Detect subregs via recursive descent instead of via SUBREG_LOC.

From-SVN: r175631
This commit is contained in:
Ulrich Weigand 2011-06-29 12:15:08 +00:00 committed by Ulrich Weigand
parent 433ba0a57b
commit f3678bfb50
2 changed files with 31 additions and 86 deletions
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13
gcc/ChangeLog
View File

@ -1,3 +1,16 @@
2011-06-29 Ulrich Weigand <Ulrich.Weigand@de.ibm.com>
PR rtl-optimization/49114
* reload.c (struct replacement): Remove SUBREG_LOC member.
(push_reload): Do not set it.
(push_replacement): Likewise.
(subst_reload): Remove dead code.
(copy_replacements): Remove assertion.
(copy_replacements_1): Do not handle SUBREG_LOC.
(move_replacements): Likewise.
(find_replacement): Remove dead code. Use reload_adjust_reg_for_mode.
Detect subregs via recursive descent instead of via SUBREG_LOC.
2011-06-29 Georg-Johann Lay <avr@gjlay.de>
* config/avr/avr.c (avr_encode_section_info): Dispatch to

104
gcc/reload.c
View File

@ -158,8 +158,6 @@ static int replace_reloads;
struct replacement
{
rtx *where; /* Location to store in */
rtx *subreg_loc; /* Location of SUBREG if WHERE is inside
a SUBREG; 0 otherwise. */
int what; /* which reload this is for */
enum machine_mode mode; /* mode it must have */
};
@ -1496,7 +1494,6 @@ push_reload (rtx in, rtx out, rtx *inloc, rtx *outloc,
{
struct replacement *r = &replacements[n_replacements++];
r->what = i;
r->subreg_loc = in_subreg_loc;
r->where = inloc;
r->mode = inmode;
}
@ -1505,7 +1502,6 @@ push_reload (rtx in, rtx out, rtx *inloc, rtx *outloc,
struct replacement *r = &replacements[n_replacements++];
r->what = i;
r->where = outloc;
r->subreg_loc = out_subreg_loc;
r->mode = outmode;
}
}
@ -1634,7 +1630,6 @@ push_replacement (rtx *loc, int reloadnum, enum machine_mode mode)
struct replacement *r = &replacements[n_replacements++];
r->what = reloadnum;
r->where = loc;
r->subreg_loc = 0;
r->mode = mode;
}
}
@ -6287,33 +6282,7 @@ subst_reloads (rtx insn)
if (GET_MODE (reloadreg) != r->mode && r->mode != VOIDmode)
reloadreg = reload_adjust_reg_for_mode (reloadreg, r->mode);
/* If we are putting this into a SUBREG and RELOADREG is a
SUBREG, we would be making nested SUBREGs, so we have to fix
this up. Note that r->where == &SUBREG_REG (*r->subreg_loc). */
if (r->subreg_loc != 0 && GET_CODE (reloadreg) == SUBREG)
{
if (GET_MODE (*r->subreg_loc)
== GET_MODE (SUBREG_REG (reloadreg)))
*r->subreg_loc = SUBREG_REG (reloadreg);
else
{
int final_offset =
SUBREG_BYTE (*r->subreg_loc) + SUBREG_BYTE (reloadreg);
/* When working with SUBREGs the rule is that the byte
offset must be a multiple of the SUBREG's mode. */
final_offset = (final_offset /
GET_MODE_SIZE (GET_MODE (*r->subreg_loc)));
final_offset = (final_offset *
GET_MODE_SIZE (GET_MODE (*r->subreg_loc)));
*r->where = SUBREG_REG (reloadreg);
SUBREG_BYTE (*r->subreg_loc) = final_offset;
}
}
else
*r->where = reloadreg;
*r->where = reloadreg;
}
/* If reload got no reg and isn't optional, something's wrong. */
else
@ -6327,10 +6296,6 @@ subst_reloads (rtx insn)
void
copy_replacements (rtx x, rtx y)
{
/* We can't support X being a SUBREG because we might then need to know its
location if something inside it was replaced. */
gcc_assert (GET_CODE (x) != SUBREG);
copy_replacements_1 (&x, &y, n_replacements);
}
@ -6344,24 +6309,13 @@ copy_replacements_1 (rtx *px, rtx *py, int orig_replacements)
const char *fmt;
for (j = 0; j < orig_replacements; j++)
{
if (replacements[j].subreg_loc == px)
{
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;
}
}
if (replacements[j].where == px)
{
r = &replacements[n_replacements++];
r->where = py;
r->what = replacements[j].what;
r->mode = replacements[j].mode;
}
x = *px;
y = *py;
@ -6387,13 +6341,8 @@ move_replacements (rtx *x, rtx *y)
int i;
for (i = 0; i < n_replacements; i++)
if (replacements[i].subreg_loc == x)
replacements[i].subreg_loc = y;
else if (replacements[i].where == x)
{
replacements[i].where = y;
replacements[i].subreg_loc = 0;
}
if (replacements[i].where == x)
replacements[i].where = y;
}
/* If LOC was scheduled to be replaced by something, return the replacement.
@ -6411,36 +6360,19 @@ find_replacement (rtx *loc)
if (reloadreg && r->where == loc)
{
if (r->mode != VOIDmode && GET_MODE (reloadreg) != r->mode)
reloadreg = gen_rtx_REG (r->mode, REGNO (reloadreg));
reloadreg = reload_adjust_reg_for_mode (reloadreg, r->mode);
return reloadreg;
}
else if (reloadreg && r->subreg_loc == loc)
else if (reloadreg && GET_CODE (*loc) == SUBREG
&& r->where == &SUBREG_REG (*loc))
{
/* RELOADREG must be either a REG or a SUBREG.
if (r->mode != VOIDmode && GET_MODE (reloadreg) != r->mode)
reloadreg = reload_adjust_reg_for_mode (reloadreg, r->mode);
??? Is it actually still ever a SUBREG? If so, why? */
if (REG_P (reloadreg))
return gen_rtx_REG (GET_MODE (*loc),
(REGNO (reloadreg) +
subreg_regno_offset (REGNO (SUBREG_REG (*loc)),
GET_MODE (SUBREG_REG (*loc)),
SUBREG_BYTE (*loc),
GET_MODE (*loc))));
else if (GET_MODE (reloadreg) == GET_MODE (*loc))
return reloadreg;
else
{
int final_offset = SUBREG_BYTE (reloadreg) + SUBREG_BYTE (*loc);
/* When working with SUBREGs the rule is that the byte
offset must be a multiple of the SUBREG's mode. */
final_offset = (final_offset / GET_MODE_SIZE (GET_MODE (*loc)));
final_offset = (final_offset * GET_MODE_SIZE (GET_MODE (*loc)));
return gen_rtx_SUBREG (GET_MODE (*loc), SUBREG_REG (reloadreg),
final_offset);
}
return simplify_gen_subreg (GET_MODE (*loc), reloadreg,
GET_MODE (SUBREG_REG (*loc)),
SUBREG_BYTE (*loc));
}
}