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From: "hubicka at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/99411] s311, s312, s31111, s31111, s3110, vsumr
 benchmark of TSVC is vectorized by clang better than by gcc
Date: Fri, 05 Mar 2021 15:03:41 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D99411

Jan Hubicka <hubicka at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|s311, s312, s31111 and      |s311, s312, s31111, s31111,
                   |s31111, s3110 benchmark of  |s3110, vsumr benchmark of
                   |TSVC is vectorized by clang |TSVC is vectorized by clang
                   |better than by gcc          |better than by gcc

--- Comment #5 from Jan Hubicka <hubicka at gcc dot gnu.org> ---

typedef float real_t;

#define iterations 100000
#define LEN_1D 32000
#define LEN_2D 256
real_t a[LEN_1D];
int main()
{

//    control loops
//    vector sum reduction

    real_t sum;
    for (int nl =3D 0; nl < iterations*10; nl++) {
        sum =3D 0.;
        for (int i =3D 0; i < LEN_1D; i++) {
            sum +=3D a[i];
        }
    }

    return sum;
}=