http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57341
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
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CC| |vmakarov at gcc dot gnu.org
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #3)
> It seems the code really wants to use anti_dependence, not true_dependence.
> We have
>
> <read> ... = equiv_mem;
> <write> dest = ...;
> <use>
Right. But if equiv_mem overlaps dest and both have non-conflicting alias
sets,
then the program is invalid and thus it would be fine to not set
equiv_mem_modified.
What is the reason why we don't do TBAA checking in anti_dependence etc.?
