On 03/29/2016 12:03 PM, Jakub Jelinek wrote:
On Tue, Mar 29, 2016 at 11:47:57AM -0600, Jeff Law wrote:
2016-03-29 Jakub Jelinek
PR rtl-optimization/70429
* combine.c (simplify_shift_const_1): For ASHIFTRT don't optimize
(cst1 >> count) >> cst2 into (cst1 >> cst2) >> c
On Tue, Mar 29, 2016 at 07:21:29PM +0200, Jakub Jelinek wrote:
> This is a case similar to the LSHIFTRT I've fixed recently.
> But, unlike LSHIFTRT, which can be handled by masking at the outer level,
> ASHIFTRT would need outer sign extension, so most of the time 2 outer
> operations in addition t
On Tue, Mar 29, 2016 at 11:47:57AM -0600, Jeff Law wrote:
> >>>2016-03-29 Jakub Jelinek
> >>>
> >>> PR rtl-optimization/70429
> >>> * combine.c (simplify_shift_const_1): For ASHIFTRT don't optimize
> >>> (cst1 >> count) >> cst2 into (cst1 >> cst2) >> count if
> >>> mode != result_mode.
>
On 03/29/2016 11:43 AM, Jakub Jelinek wrote:
On Tue, Mar 29, 2016 at 11:34:29AM -0600, Jeff Law wrote:
This is a case similar to the LSHIFTRT I've fixed recently.
But, unlike LSHIFTRT, which can be handled by masking at the outer level,
ASHIFTRT would need outer sign extension, so most of the ti
On Tue, Mar 29, 2016 at 11:34:29AM -0600, Jeff Law wrote:
> >This is a case similar to the LSHIFTRT I've fixed recently.
> >But, unlike LSHIFTRT, which can be handled by masking at the outer level,
> >ASHIFTRT would need outer sign extension, so most of the time 2 outer
> >operations in addition to
On 03/29/2016 11:21 AM, Jakub Jelinek wrote:
Hi!
This is a case similar to the LSHIFTRT I've fixed recently.
But, unlike LSHIFTRT, which can be handled by masking at the outer level,
ASHIFTRT would need outer sign extension, so most of the time 2 outer
operations in addition to the kept two inne
Hi!
This is a case similar to the LSHIFTRT I've fixed recently.
But, unlike LSHIFTRT, which can be handled by masking at the outer level,
ASHIFTRT would need outer sign extension, so most of the time 2 outer
operations in addition to the kept two inner shifts, which is IMHO very
unlikely to ever b
