https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83177
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
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CC| |ienkovich at gcc dot gnu.org
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Seems chkp_get_bounds_by_definition is called multiple times for the same stmt
and we end up with:
a_24(ab) = a_2(ab) + 18446744073709551612;
__bound_tmp.1_39 = __bound_tmp.0_35(ab);
__bound_tmp.0_40(ab) = __bound_tmp.1_39;
__bound_tmp.1_37 = __bound_tmp.0_35(ab);
__bound_tmp.0_38 = __bound_tmp.1_37;
where the first pair of __bound_tmp assignments comes from the second
invocation and the second pair from the first one. That is of course invalid,
as it has overlapping ranges for (ab) __bound_tmp.0.
Not sure what would be the best fix, maybe if we need bounds across some
abnormal edge create a new SSA_NAME for that and assign it near the bottom of
the bb that computes that bound.
Anyway, not working on this.
