[Bug target/94046] cast to __m256d in mask argument of avx2 float gather intrinsics

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94046

--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 47980
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47980&action=edit
gcc10-pr94046.patch

Full untested patch.