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re PR rtl-optimization/60155 (ICE: in get_pressure_class_and_nregs at gcse.c:3438)

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PR rtl-optimization/60155
	* gcse.c (record_set_data): New function.
	(single_set_gcse): New function.
	(gcse_emit_move_after): Use single_set_gcse instead of single_set.
	(hoist_code): Likewise.
	(get_pressure_class_and_nregs): Likewise.

From-SVN: r209134
This commit is contained in:
John David Anglin 2014-04-04 22:25:51 +00:00
parent 3e0da29a99
commit b680881871
2 changed files with 73 additions and 7 deletions
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9
gcc/ChangeLog
View File

@ -1,3 +1,12 @@
2014-04-04 John David Anglin <danglin@gcc.gnu.org>
PR rtl-optimization/60155
* gcse.c (record_set_data): New function.
(single_set_gcse): New function.
(gcse_emit_move_after): Use single_set_gcse instead of single_set.
(hoist_code): Likewise.
(get_pressure_class_and_nregs): Likewise.
2014-04-04 Eric Botcazou <ebotcazou@adacore.com>
* explow.c (probe_stack_range): Emit a final optimization blockage.

71
gcc/gcse.c
View File

@ -2502,6 +2502,65 @@ pre_insert_copies (void)
}
}
struct set_data
{
rtx insn;
const_rtx set;
int nsets;
};
/* Increment number of sets and record set in DATA. */
static void
record_set_data (rtx dest, const_rtx set, void *data)
{
struct set_data *s = (struct set_data *)data;
if (GET_CODE (set) == SET)
{
/* We allow insns having multiple sets, where all but one are
dead as single set insns. In the common case only a single
set is present, so we want to avoid checking for REG_UNUSED
notes unless necessary. */
if (s->nsets == 1
&& find_reg_note (s->insn, REG_UNUSED, SET_DEST (s->set))
&& !side_effects_p (s->set))
s->nsets = 0;
if (!s->nsets)
{
/* Record this set. */
s->nsets += 1;
s->set = set;
}
else if (!find_reg_note (s->insn, REG_UNUSED, dest)
|| side_effects_p (set))
s->nsets += 1;
}
}
static const_rtx
single_set_gcse (rtx insn)
{
struct set_data s;
rtx pattern;
gcc_assert (INSN_P (insn));
/* Optimize common case. */
pattern = PATTERN (insn);
if (GET_CODE (pattern) == SET)
return pattern;
s.insn = insn;
s.nsets = 0;
note_stores (pattern, record_set_data, &s);
/* Considered invariant insns have exactly one set. */
gcc_assert (s.nsets == 1);
return s.set;
}
/* Emit move from SRC to DEST noting the equivalence with expression computed
in INSN. */
@ -2509,7 +2568,8 @@ static rtx
gcse_emit_move_after (rtx dest, rtx src, rtx insn)
{
rtx new_rtx;
rtx set = single_set (insn), set2;
const_rtx set = single_set_gcse (insn);
rtx set2;
rtx note;
rtx eqv = NULL_RTX;
@ -3369,13 +3429,12 @@ hoist_code (void)
FOR_EACH_VEC_ELT (occrs_to_hoist, j, occr)
{
rtx insn;
rtx set;
const_rtx set;
gcc_assert (!occr->deleted_p);
insn = occr->insn;
set = single_set (insn);
gcc_assert (set);
set = single_set_gcse (insn);
/* Create a pseudo-reg to store the result of reaching
expressions into. Get the mode for the new pseudo
@ -3456,10 +3515,8 @@ get_pressure_class_and_nregs (rtx insn, int *nregs)
{
rtx reg;
enum reg_class pressure_class;
rtx set = single_set (insn);
const_rtx set = single_set_gcse (insn);
/* Considered invariant insns have only one set. */
gcc_assert (set != NULL_RTX);
reg = SET_DEST (set);
if (GET_CODE (reg) == SUBREG)
reg = SUBREG_REG (reg);