On Thu, 13 Aug 2015, Mike Stump wrote:
> On Aug 12, 2015, at 7:43 PM, Segher Boessenkool
> wrote:
> > Yes. And there are much worse problems, like many things not working
> > right if your HOST_WIDE_INT would happen to be more than 64 bits; we
> > cannot really shake those out because there is
On Aug 12, 2015, at 7:43 PM, Segher Boessenkool
wrote:
> Yes. And there are much worse problems, like many things not working
> right if your HOST_WIDE_INT would happen to be more than 64 bits; we
> cannot really shake those out because there is no actual system to
> test that on -- but it also
On Wed, Aug 12, 2015 at 08:55:51AM -0700, Richard Henderson wrote:
> On 08/12/2015 07:02 AM, Segher Boessenkool wrote:
> > On Tue, Aug 11, 2015 at 06:11:35PM -0700, Richard Henderson wrote:
> >> @@ -8173,6 +8173,13 @@ genimm_ppc::exam_search (HOST_WIDE_INT c, int
> >> budget)
> >>if (exam_mask
On 08/12/2015 07:02 AM, Segher Boessenkool wrote:
> On Tue, Aug 11, 2015 at 06:11:35PM -0700, Richard Henderson wrote:
>> @@ -8173,6 +8173,13 @@ genimm_ppc::exam_search (HOST_WIDE_INT c, int budget)
>>if (exam_mask (-1, c, sub_budget))
>> return true;
>>
>> + /* If the two halves are eq
On Tue, Aug 11, 2015 at 06:11:35PM -0700, Richard Henderson wrote:
> @@ -8173,6 +8173,13 @@ genimm_ppc::exam_search (HOST_WIDE_INT c, int budget)
>if (exam_mask (-1, c, sub_budget))
> return true;
>
> + /* If the two halves are equal, use an insert. */
> + if (c >> 32 == test && exam_
Save 2 insns for constants like 0x where
the low 32-bits can be replicated to the high 32-bits.
Cc: David Edelsohn
---
* config/rs6000/rs6000.c (genimm_ppc::exam_search): Check for
two equal 32-bit pieces.
(genimm_ppc::generate): Handle VEC_DUPLICATE.
---
