[Bug c/96597] valgrind error in do_hoist_insertion during O3 build

[dcb314 at hotmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96597

--- Comment #4 from David Binderman <dcb314 at hotmail dot com> ---
Code seems ok on date 20200724, so someone has broken something recently.