Good question, I'm assuming it's due to the calculation happen across a memory barrier of some kind or due to all the branches in between so llvm is probably av

Good question, I'm assuming it's due to the calculation happen across a memory barrier of some kind or due to all the branches in between so llvm is probably avoiding the optimization. It was quite a while ago so it is something I could re-investigate and actually try and fix. I would have to wait for downtime with all the other tickets I'm getting though. It's also just something that dxc itself should be doing, but I have no control over that.