[Bug gcov-profile/103652] Producing profile with -O2 -flto and trying to consume it with -O3 -flto leads to ICEs on indirect call profiling

[marxin at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103652

--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Jan Hubicka from comment #0)
> Building clang in the funny way (training with -O2 -flto -fprofile-generate)
> and use with -O3 -flto -fprofile-generate I get ICE here:

Do you mean, -O3 -flto -fprofile-use, right?

I would have expected some -Werror=coverage-mismatch errors. Can you please
create a smaller reproducer where you see the error?