[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 #3 from Yichao Yu <yyc1992 at gmail dot com> ---
> What exact version of LLVM are you trying to compile?  Revision of the LLVM sources including revision of clang, etc.

I was compiling the trunk version. The version I started reducing from was
https://github.com/llvm-mirror/llvm/commit/0885462106134999f8aa80a3a71bfed160910248
but it happens on at least 3 different version I've tried before this commit.

> Can you try compile GCC from the 6 branch and try again because having just a date might not be enough to reproduce the problem.

The script used to compile GCC is
https://github.com/archlinuxarm/PKGBUILDs/blob/master/core/gcc/PKGBUILD so it
seems to be using commit `c2103c17` I can also try to compile a more recent
version locally (will take some time).