[Bug tree-optimization/81053] ICE on valid code at -O3 on x86_64-linux-gnu: in as_a, at is-a.h:192

[dcb314 at hotmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81053

--- Comment #1 from David Binderman <dcb314 at hotmail dot com> ---
Problem seems to occur between gcc revisions 249048 and 249069.