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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/98563] [10/11 Regression] vectorization fails
 while it worked on gcc 9 and earlier since since
 r10-2271-gd81ab49d0586fca0
Date: Tue, 26 Jan 2021 12:48:35 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D98563

--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I'm afraid no.
The vectorization can handle addresses into the simd arrays, but right now =
only
if it accesses the whole element, i.e. when we can turn the simd array into=
 a
vector register (or set thereof) that hold the variable.
In this case that is not the case, as in the end it uses the real and imag
parts separately.
So, either it can be handled in SRA, or we'd need to teach the vectorizer to
permute those fur us.=