https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102970
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
The gimple level looks correct:
<bb 4> [local count: 8209314308]:
# __cur_2 = PHI <__cur_149(5), _141(3)>
# __first_156 = PHI <__first_148(5), &D.24777(3)>
# prephitmp_155 = PHI <pretmp_3(5), 900(3)>
# prephitmp_153 = PHI <pretmp_142(5), 11(3)>
# prephitmp_108 = PHI <pretmp_109(5), 22(3)>
# prephitmp_105 = PHI <pretmp_106(5), 33(3)>
MEM[(int *)__cur_2] = prephitmp_155;
MEM[(int *)__cur_2 + 4B] = prephitmp_153;
MEM[(int *)__cur_2 + 8B] = prephitmp_108;
MEM[(int *)__cur_2 + 12B] = prephitmp_105;
__first_148 = __first_156 + 16;
__cur_149 = __cur_2 + 16;
if (&MEM <const struct box[19]> [(void *)&D.24777 + 304B] != __first_148)
goto <bb 5>; [89.00%]
else
goto <bb 6>; [11.00%]
<bb 5> [local count: 7306289739]:
pretmp_3 = MEM[(int *)__first_148];
pretmp_142 = MEM[(int *)__first_148 + 4B];
pretmp_109 = MEM[(int *)__first_148 + 8B];
pretmp_106 = MEM[(int *)__first_148 + 12B];
goto <bb 4>; [100.00%]
I suspect the rtl level unroller messes up the first iteration for the stores
in the above case.
