Avoid materializing a compressed value into a register if that value is
only used for a compare afterward. Instead, emit it directly as an
immediate on the cml. We can only do this for the Cmp(Register,...)
overload, not Cmp(Operand,...), since the latter already has the lhs as
a complex operand.

Change-Id: I99f192c9919e401164d31d2e2e1c3a0c21a6aaf0
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3762577
Auto-Submit: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81721}