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From: "crazylht at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/101908] [12 regression] cray regression with -O2
 -ftree-slp-vectorize compared to -O2
Date: Tue, 15 Mar 2022 01:52:33 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D101908

--- Comment #41 from Hongtao.liu <crazylht at gmail dot com> ---
(In reply to Richard Biener from comment #22)
> (In reply to Hongtao.liu from comment #21)
> > Now we have SLP node available in vector cost hook, maybe we can do sth=
 in
> > cost model to prevent vectorization when node's definition from big-size
> > parameter.
>=20
> Note we vectorize a load here for which we do not pass down an SLP node.
> But of course there's the stmt-info one could look at - but the issue
> is that for SLP that doesn't tell you which part of the variable is acces=
sed.
> Also even if we were to pass down the SLP node we do not know exactly how
> it is going to vectorize - but sure, we could play with some heuristics
Then, we can't get exact offset between load address and store address.=