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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/99989] [11 regression] False maybe-uninitialized
 warning breaks bootstrap on riscv64
Date: Fri, 09 Apr 2021 10:40:27 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D99989

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #1)
> This isn't the first PR where wide_ints are a problem for -W*uninitialized
> warnings.  The primary problem is that generic_wide_int default ctor does
> nothing and so does wide_int_storage default ctor, so keeps everything
> uninitialized.
> Do we want some non-default ctor say with some magic enum or whatever
> argument that would zero initialize the whole storage?

I don't think we want any initialization unless we invent an explicitely
"uninitialized" state.  Note that wide-int storage is large - I suppose
initializing precision to zero could be done, but I'd avoid initializing
the storage.=