[llvm] r255550 - Start implementing FDE dumping when printing the eh_frame.

[Rafael Espíndola via llvm-commits]

> +    if (CIEIt == CachedCIEs.end())
> +      llvm_unreachable("Couldn't find CIE at offset in to __eh_frame section");
>

report_fatal_error or similar. The same for the asserts.

Cheers,
Rafael