Vladimir Makarov wrote:
>
> As I correctly understand, you just want an intuitive allocation. The
> current allocation performance has the same quality as the intuitive one.
Performance is affected as well but I didn't want to go into details as that
distracts from the underlying issue. But if yo
Segher Boessenkool wrote:
>
> "0,r" might work, or "0,?r", or similar (alternatives have commas
> between them).
No, it doesn't work at all. But that is no surprise if you look at
ira_get_dup_out_num.
It iterates over the constraint string and if you have anything that matches
after a "0",
the "
On 8/23/17 5:22 PM, Segher Boessenkool wrote:
> On Wed, Aug 23, 2017 at 05:15:03PM +, Wilco Dijkstra wrote:
>> What is a preferred alternative? The current register allocator simply
>> ignores
>> any combination of "0r", "r0", ("r", "0") and ("0", "r") and just picks the
>> most
>> generic al
On 08/22/2017 06:48 AM, Wilco Dijkstra wrote:
Hi,
The register allocator inserts move preferences when an instruction has
one or more dead sources in add_insn_allocno_copies. If an instruction
doesn't have a matching constraint (eg. "0"), then any dead source is treated
as a copy with all dest
On Wed, Aug 23, 2017 at 05:15:03PM +, Wilco Dijkstra wrote:
> Segher Boessenkool wrote:
> > On Tue, Aug 22, 2017 at 10:48:17AM +, Wilco Dijkstra wrote:
> > > The register allocator inserts move preferences when an instruction has
> > > one or more dead sources in add_insn_allocno_copies. If
Segher Boessenkool wrote:
> On Tue, Aug 22, 2017 at 10:48:17AM +, Wilco Dijkstra wrote:
> > The register allocator inserts move preferences when an instruction has
> > one or more dead sources in add_insn_allocno_copies. If an instruction
> > doesn't have a matching constraint (eg. "0"), then a
Hi!
On Tue, Aug 22, 2017 at 10:48:17AM +, Wilco Dijkstra wrote:
> The register allocator inserts move preferences when an instruction has
> one or more dead sources in add_insn_allocno_copies. If an instruction
> doesn't have a matching constraint (eg. "0"), then any dead source is treated
> a
