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From: "kungfujesus06 at gmail dot com" <sourceware-bugzilla@sourceware.org>
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Subject: [Bug malloc/27227] Memory corruption for altivec unaligned load /
 store
Date: Fri, 22 Jan 2021 22:20:23 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D27227

--- Comment #4 from Adam Stylinski <kungfujesus06 at gmail dot com> ---
It can be but not in the current test scenario I have.  Doing vec_ld(15, pt=
r)
for the second half essentially means that the load will never span outside=
 the
heap in the even that the address just so happens to be aligned, no?

Basically the final unaligned loads in the last column are triggering asan =
and
in general are causing issues.  I suspect the logic for unaligned stores are
causing similar grief.  I _thought_ I had been doing exactly what Apple had
mentioned here:

> Typically this means that a looping function will have to stop one loop i=
teration before it reaches the end of the data run, and handle the last few=
 bytes in special case code.=20

Is this now broken or had I been doing the remainder peeling incorrectly all
along?

--=20
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