On 04/01/2016 04:51 PM, Jakub Jelinek wrote:
On Fri, Apr 01, 2016 at 03:35:19PM +0200, Bernd Schmidt wrote:
On 04/01/2016 03:14 PM, Jakub Jelinek wrote:
As the testcase below shows, we can end up with lots of useless
instructions from multi-word arithmetics.
simplify-rtx.c can optimize x
On Fri, Apr 01, 2016 at 03:35:19PM +0200, Bernd Schmidt wrote:
> On 04/01/2016 03:14 PM, Jakub Jelinek wrote:
> >As the testcase below shows, we can end up with lots of useless
> >instructions from multi-word arithmetics.
> >simplify-rtx.c can optimize x {&,|,^}= {0,-1}, but while
> >x &= 0 or x
On 04/01/2016 03:14 PM, Jakub Jelinek wrote:
As the testcase below shows, we can end up with lots of useless
instructions from multi-word arithmetics.
simplify-rtx.c can optimize x {&,|,^}= {0,-1}, but while
x &= 0 or x {|,^}= -1 are optimized into constants and CSE can handle those
fine, we
Hi!
As the testcase below shows, we can end up with lots of useless
instructions from multi-word arithmetics.
simplify-rtx.c can optimize x {&,|,^}= {0,-1}, but while
x &= 0 or x {|,^}= -1 are optimized into constants and CSE can handle those
fine, we keep x &= -1 and x {|,^}= 0 in the IL until
