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From: "dave.anglin at bell dot net" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/102162] Byte-wise access optimized away at -O1 and
 above
Date: Thu, 02 Sep 2021 00:47:18 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D102162

--- Comment #24 from dave.anglin at bell dot net ---
On 2021-09-01 8:23 p.m., pinskia at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D102162
>
> --- Comment #23 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
> (In reply to Andrew Pinski from comment #22)
>> The problem is in emit-rtl.c in set_mem_attributes_minus_bitpos:
>>
>>   /* We can set the alignment from the type if we are making an object o=
r if
>>      this is an INDIRECT_REF.  */
>>   if (objectp || TREE_CODE (t) =3D=3D INDIRECT_REF)
>>     attrs.align =3D MAX (attrs.align, TYPE_ALIGN (type));
>>
>>
>> The type here is not the correct thing to do.
> This has been a bug since r0-38512 (2001).
Excellent work!=C2=A0 I assume attrs.align should only be set from type whe=
n it is
not set.=