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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 and s31111, s3110
 benchmark of TSVC is vectorized by clang better than by gcc
Date: Fri, 05 Mar 2021 14:49:33 +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 and
                   |s31111 benchmark of TSVC is |s31111, s3110 benchmark of
                   |vectorized by clang better  |TSVC is vectorized by clang
                   |than by gcc                 |better than by gcc

--- Comment #4 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];
real_t aa[LEN_2D][LEN_2D];
int main()
{

//    reductions
//    if to max with index reductio 2 dimensions
//    similar to S315

    int xindex, yindex;
    real_t max, chksum;
    for (int nl =3D 0; nl < 100*(iterations/(LEN_2D)); nl++) {
        max =3D aa[(0)][0];
        xindex =3D 0;
        yindex =3D 0;
        for (int i =3D 0; i < LEN_2D; i++) {
            for (int j =3D 0; j < LEN_2D; j++) {
                if (aa[i][j] > max) {
                    max =3D aa[i][j];
                    xindex =3D i;
                    yindex =3D j;
                }
            }
        }
        chksum =3D max + (real_t) xindex + (real_t) yindex;
    }
    return max + xindex+1 + yindex+1;
}=