Adding a lld option to support emitting pseudo probe metadata in LTO mode.
Add the check for the alias option plugin-opt=pseudo-probe-for-profiling?
nit: Encode -> Emit? the clang driver help messages says "Emit pseudo probes for sample profiler", would be good change to "profiling" there too.
lgtm with minor comment.
I actually meant to suggest both lld and clang driver use "Emit pseudo probes for sample profiling", the switch name uses profiling.