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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/98908] Failure to optimize arithmetic
 involving struct members into operating on the entire struct
Date: Tue, 02 Feb 2021 07:58:32 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D98908

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Blocks|                            |53947
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2021-02-02
     Ever confirmed|0                           |1

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
The vectorizer would do this if there's a V2QImode or generic vect would be
enabled for sth not just word_mode size.  For SLP vectorization it should be
easy to restrict the search space (aka choose a prefered SIMD mode).


Referenced Bugs:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D53947
[Bug 53947] [meta-bug] vectorizer missed-optimizations=