https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117922
Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
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CC| |ebotcazou at gcc dot gnu.org
--- Comment #13 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> One issue in fold-mem-offsets is that it seems to do per-BB operation but
> relies on global DF and looks at uses/defs also not within a BB? If it's
> supposed to be "global" then a better order than FOR_ALL_BB_FN might improve
> things.
It also seems to do the same work multiple times: for each "root" in a given
BB, it goes up to its def in the BB and then goes down to all the uses of this
def, but I presume that this could be done only once per def?
