[Bug c++/104226] [12 Regression] ICE in fold_vec_perm, at fold-const.cc:10483 since r12-6821-g053bcc97f4a59e3f

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104226

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 52288
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=52288&action=edit
gcc12-pr104226.patch

Untested fix.