[Bug c/105134] tree-vectorize produces error code

[piliu at redhat dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105134

--- Comment #1 from piliu at redhat dot com ---
More description about the background.

There is a built file kexec-tools/purgatory/purgatory.ro, which is a tiny
bootload, compare and verify the sha256, if ok, then jump to the 2nd kernel.

The original sha256 value comes from
update_purgatory()
{
......
        elf_rel_set_symbol(&info->rhdr, "sha256_regions", &region,
                           sizeof(region));
        elf_rel_set_symbol(&info->rhdr, "sha256_digest", &digest,
                           sizeof(digest));

}

They are based on the loaded linux kernel image.

Now, "kexec -e" and purgatory.ro runs, and in
void purgatory(void)
{
        printf("I'm in purgatory\n");
        setup_arch();
        if (!skip_checks && verify_sha256_digest()) {
                for(;;) {
                        /* loop forever */   ------> stuck here
                }
        }
        post_verification_setup_arch();
}