[LLVMdev] Difficulty with reusing DAG nodes.

[Eli Friedman]

On Thu, Sep 11, 2008 at 6:09 PM, Richard Pennington <rich at pennware.com> wrote:
> I'm trying to implement *MUL_LOHI for my processor.
>
> My processor has mulxss (e.g.) that gives the 32 high bits of a 64 bit
> multiply.

I haven't looked at the rest of the email carefully, but why aren't
you just implementing MULHU and MULHS?  There's no point to
implementing the *MUL_LOHI variants if the processor doesn't have
them.

-Eli