https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105363
Hongtao.liu <crazylht at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |crazylht at gmail dot com
--- Comment #1 from Hongtao.liu <crazylht at gmail dot com> ---
STLF issues here.
Performance counter stats for './12.out':
1,248,728,604 ld_blocks.store_forward:u
5.756169101 seconds time elapsed
5.746946000 seconds user
0.001999000 seconds sys
and this case doens't need IPA, it's SLP inside the loop which has
cross-iteration data-dependence, I think we need to prevent that.
#define N 50000
int a[N];
void insertionsort(int a[], int n)
{
int i, j;
for (i = 1; i < n; i++) {
for (j = i-1; j >= 0 && a[j] > a[j+1]; j--) {
int t = a[j+1];
a[j+1] = a[j];
a[j] = t;
}
}
}
dump:
<bb 5> [local count: 958878294]:
MEM <vector(2) int> [(int *)_37] = vect__4.9_45;
ivtmp.17_47 = ivtmp.17_28 + 18446744073709551612;
if (_11 != ivtmp.17_47)
goto <bb 7>; [94.50%]
else
goto <bb 6>; [5.50%]
<bb 6> [local count: 114863531]:
ivtmp.25_50 = ivtmp.25_9 + 1;
ivtmp.28_52 = ivtmp.28_51 + 4;
if (ivtmp.25_50 != _59)
goto <bb 4>; [89.00%]
else
goto <bb 8>; [11.00%]
<bb 7> [local count: 1014686024]:
# ivtmp.17_28 = PHI <ivtmp.17_47(5), _61(4)>
_37 = (void *) ivtmp.17_28;
vect__8.8_46 = MEM <vector(2) int> [(int *)_37];
vect__4.9_45 = VEC_PERM_EXPR <vect__8.8_46, vect__8.8_46, { 1, 0 }>;
_43 = BIT_FIELD_REF <vect__8.8_46, 32, 0>;
_44 = BIT_FIELD_REF <vect__8.8_46, 32, 32>;
if (_43 > _44)
goto <bb 5>; [94.50%]
else
goto <bb 6>; [5.50%]
<bb 8> [local count: 14196616]:
