https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86557

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Blocks|                            |53947

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
But even with that we seem to need AVX512F to vectorize it, with AVX2 we get

t.C:5:31: note:   not vectorized: relevant stmt not supported: patt_45 =
patt_44 >> 2;

thus, somehow V2DI arithmetic right shifts are not available.  Indeed
it looks like we only have named patterns for V4SI arithmetic right shifts for
AVX2.

I'm going to bootstrap / test the vectorizer fix.


Referenced Bugs:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53947
[Bug 53947] [meta-bug] vectorizer missed-optimizations

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