+++
title = "Cannot add moves too early"
author = "Yann Herklotz"
tags = []
categories = []
backlinks = ["3a8g1"]
forwardlinks = ["3a8g1b"]
zettelid = "3a8g1a"
+++

Unfortunately, the η instructions actually cannot really be identified
before the SSA is actually generated, which means that the renaming
cannot really be done by the SSA pass. This is because one would
otherwise need some liveness analysis to be able to figure out which
variables one would have to rename at that point.