On Mon, Sep 1, 2014 at 3:49 PM, Segher Boessenkool
wrote:
> This is a little more complex. The highpart muls generate a "truncate
> lshiftrt" pattern that is not canonical when widening to two registers,
> so this doesn't optimise well with combine. This patch changes it to use
> the canonical s
This is a little more complex. The highpart muls generate a "truncate
lshiftrt" pattern that is not canonical when widening to two registers,
so this doesn't optimise well with combine. This patch changes it to use
the canonical subreg patterns instead, which means we need separate patterns
for L
