[Bug sanitizer/80308] [7 Regression] asan crash on big-endian powerpc-linux target

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80308

--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 41131
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41131&action=edit
gcc7-pr80308.patch

Full patch (untested so far).