What is the meaning of mode on a SET

[Ian Lance Taylor]

On Mon, Aug 6, 2012 at 2:28 AM, Steven Bosscher <stevenb.gcc@gmail.com> wrote:
>
> There are ~1000 uses of gen_rtx_SET in gcc, excluding generated files.
> The vast majority generate a SET with VOIDmode, but a few (less than
> 100) use a non-VOIDmode SET.
>
> What is the meaning of the mode on a SET?

I do not recall any passes using the mode of a SET.  I suspect that
anything generating a SET with something other than VOIDmode is a bug.

Ian