[Bug middle-end/77996] Miscompilation due to LTO on aarch64

[yyc1992 at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77996

--- Comment #8 from Yichao Yu <yyc1992 at gmail dot com> ---
> Can you try with -fno-strict-aliasing ?

That seems to fix it for both the original case (LLVM) and the reduced case
(the linked tarball). Is there a way to figure out the problematic (either bug
in LLVM's code or gcc's alias detection) aliasing assumption?