On 12/19/2011 11:06 PM, Richard Sandiford wrote:
I've normally tried to avoid self-approving rtl optimiser stuff,
but since this is a simple extension of the existing MEM handling,
and since the mode_rep_extended test effectively makes it MIPS-specific,
I hope it's OK to make an exception here.
On Dec 19, 2011, at 2:25 PM, Richard Sandiford wrote:
> I've just added a PR reference to the ChangeLog entry. I don't think it's
> the kind of thing that should be backported to branches, but I'm never
> too sure whether that means the bug should be closed as fixed or not.
Closed, fixed, known t
Andrew Pinski writes:
> On Mon, Dec 19, 2011 at 2:06 PM, Richard Sandiford
> wrote:
>> forward_propagate_subreg has code to optimise sequences like:
>>
>> (set (reg:DI X) (*_extend:DI (reg:SI Y)))
>> (... (subreg:SI (reg:DI X)) ...)
>>
>> by replacing (subreg:SI (reg:DI X)) with (reg:SI Y).
On Mon, Dec 19, 2011 at 2:06 PM, Richard Sandiford
wrote:
> forward_propagate_subreg has code to optimise sequences like:
>
> (set (reg:DI X) (*_extend:DI (reg:SI Y)))
> (... (subreg:SI (reg:DI X)) ...)
>
> by replacing (subreg:SI (reg:DI X)) with (reg:SI Y). However, there is
> a special c
forward_propagate_subreg has code to optimise sequences like:
(set (reg:DI X) (*_extend:DI (reg:SI Y)))
(... (subreg:SI (reg:DI X)) ...)
by replacing (subreg:SI (reg:DI X)) with (reg:SI Y). However, there is
a special case to stop this happening if Y is loaded from memory and the
extensi
