[Bug tree-optimization/80072] [7 Regression] ICE in gimple_build_assign_1 with -O3 -march=broadwell/skylake-avx512

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80072

--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 41020
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41020&action=edit
gcc7-pr80072.patch

Full untested patch.