https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116747
--- Comment #8 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
1: dump_data_dependence_relation(stdout, ddr) = (Data Dep:
#(Data Ref:
# bb: 12
# stmt: d[e.0_43] = _17;
# ref: d[e.0_43];
# base_object: d[e.0_43];
#)
#(Data Ref:
# bb: 12
# stmt: d[e.0_43] = _41;
# ref: d[e.0_43];
# base_object: d[e.0_43];
#)
(no dependence)
)
That is wrong. This is a write after write dependency.
The question now becomes why DDR_ARE_DEPENDENT is chrec_known.
Even though it is obvious. So the bug is not in phiopt at all it seems but
tree-data-ref.cc.
