https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103029
luoxhu at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |luoxhu at gcc dot gnu.org,
| |rguenther at suse dot de
--- Comment #2 from luoxhu at gcc dot gnu.org ---
Confirmed.
P7's extra option -mno-allow-movmisalign makes this ICE happens. If add this
option on P9 also ICEs. Reason is the phi arguments order changes if switch the
sequence of loopify and lv_adjust_loop_entry_edge.
the constant input argument from bb 18 is in phi index 1 now makes the followed
vectorize code fail to handle?
if (_42 != 0)
goto <bb 18>; [80.00%]
else
goto <bb 19>; [20.00%]
<bb 18> [local count: 67276368]:
<bb 9> [local count: 611603351]:
# i_76 = PHI <i_57(10), 1(18)> // here
# y_lsm.6_74 = PHI <_61(10), 0.0(18)> // here
# w_lsm.7_73 = PHI <_58(10), 0.0(18)> // here
i.0_72 = (unsigned int) i_76;
_70 = (long unsigned int) i.0_72;
_69 = _70 * 80;
x_68 = r_22(D) + _69;
fpred_67 = x_68->f_pred;
fexp_66 = x_68->f_exp;
tem_65 = fpred_67 - fexp_66;
_64 = x_68->f_sigma;
_63 = tem_65 / _64;
_62 = ABS_EXPR <_63>;
_61 = _62 + y_lsm.6_74;
_60 = tem_65 / fexp_66;
_59 = ABS_EXPR <_60>;
_58 = _59 + w_lsm.7_73;
i_57 = i_76 + 1;
if (n_19(D) > i_57)
goto <bb 10>; [89.00%]
else
goto <bb 14>; [11.00%]
<bb 10> [local count: 544326983]:
goto <bb 9>; [100.00%]
It was:
if (_42 != 0)
goto <bb 18>; [80.00%]
else
goto <bb 19>; [20.00%]
<bb 18> [local count: 67276368]:
<bb 9> [local count: 611603351]:
# i_76 = PHI <1(18), i_57(10)>
# y_lsm.6_74 = PHI <0.0(18), _61(10)>
# w_lsm.7_73 = PHI <0.0(18), _58(10)>
i.0_72 = (unsigned int) i_76;
_70 = (long unsigned int) i.0_72;
_69 = _70 * 80;
x_68 = r_22(D) + _69;
fpred_67 = x_68->f_pred;
fexp_66 = x_68->f_exp;
tem_65 = fpred_67 - fexp_66;
_64 = x_68->f_sigma;
_63 = tem_65 / _64;
_62 = ABS_EXPR <_63>;
_61 = _62 + y_lsm.6_74;
_60 = tem_65 / fexp_66;
_59 = ABS_EXPR <_60>;
_58 = _59 + w_lsm.7_73;
i_57 = i_76 + 1;
if (n_19(D) > i_57)
goto <bb 10>; [89.00%]
else
goto <bb 20>; [11.00%]
<bb 10> [local count: 544326983]:
goto <bb 9>; [100.00%]
The comments in function gimple_lv_adjust_loop_header_phi says
/* Browse all 'second' basic block phi nodes and add phi args to
edge 'e' for 'first' head. PHI args are always in correct order. */
Any function to fix the phi order?
