[Bug tree-optimization/106343] SLP does not support no-op case

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106343

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |UNCONFIRMED
     Ever confirmed|1                           |0
           Severity|normal                      |enhancement
   Last reconfirmed|2022-07-18 00:00:00         |
             Target|aarch64, x86_64             |aarch64
            Summary|Addition with constants is  |SLP does not support no-op
                   |not vectorized by SLP when  |case
                   |it includes zero            |

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Also an issue with multiply:

void foo (unsigned *__restrict dst, unsigned *__restrict src1)
{
    dst[0] = src1[0] * 1;
    dst[1] = src1[1] * 2;
    dst[2] = src1[2] * 3;
    dst[3] = src1[3] * 4;
    dst[4] = src1[4] * 5;
    dst[5] = src1[5] * 6;
    dst[6] = src1[6] * 7;
    dst[7] = src1[7] * 8;
}