[LLVMdev] virtual register does not exist

[Jakob Stoklund Olesen]

On Feb 22, 2011, at 3:37 PM, drizzle drizzle wrote:

> Hi
>  is there a way to know later that an earlier pass inside the codegen
> might have eliminated a virtual register.
> I carry information abt virtual registers which i would like to update
> if any virtual register does not exist since.

You can check if any instructions are using it with MRI->reg_nodbg_empty(Reg).

/jakob