[llvm-commits] [PATCH] Execution domain support for VMOV and VLDR

[Tim Northover]

Hi again,

> You can't add a dependency on a value that isn't there, so you need to know that %s1 is live before you can add the <imp-use> operand.
>
> The transformation is safe if you can establish that the original instruction is already reading or writing the other lane.

Just one more quick question that you'll probably know the answer to
immediately: from these I inferred that there's no easy way to check
whether %s1 *is* live at that point; I've certainly not seen one in my
travels, but haven't looked recently. Is that correct?

Tim.