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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/65211] Type alignment lost inside templated function
Date: Sun, 05 Dec 2021 06:45:06 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D65211

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2021-12-05
     Ever confirmed|0                           |1

--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Confirmed, simplified testcase:
typedef unsigned v4ui __attribute__ ((vector_size(16), aligned (16)));
typedef unsigned v4ui_unaligned __attribute__ ((vector_size (16), aligned
(4)));
template<int I>
static v4ui t(unsigned *dest_data)
{
    return ((const v4ui_unaligned*)dest_data)[0];
}
template<int I>
static v4ui t1(unsigned *dest_data)
{
    typedef unsigned v4ui_1 __attribute__ ((vector_size (16), aligned (4)));
    return ((const v4ui_1*)dest_data)[0];
}
v4ui g(unsigned int *array)
{
    return t<1>(array+7);
}
v4ui f(unsigned int *array)
{
    return t1<1>(array+7);
}

Still a bug on the trunk even.=