Hi,
On Fri, 18 Nov 2016, Bin.Cheng wrote:
> On Wed, Nov 16, 2016 at 3:05 PM, Andreas Schwab wrote:
> > On Nov 14 2016, Michael Matz wrote:
> >
> >> PR missed-optimization/77881
> >> * combine.c (simplify_comparison): Remove useless subregs
> >> also inside the loop, not just a
On Wed, Nov 16, 2016 at 3:05 PM, Andreas Schwab wrote:
> On Nov 14 2016, Michael Matz wrote:
>
>> PR missed-optimization/77881
>> * combine.c (simplify_comparison): Remove useless subregs
>> also inside the loop, not just after it.
>> (make_compound_operation): Recognize s
On Nov 14 2016, Michael Matz wrote:
> PR missed-optimization/77881
> * combine.c (simplify_comparison): Remove useless subregs
> also inside the loop, not just after it.
> (make_compound_operation): Recognize some subregs as being
> masking as well.
This breaks gcc.
On Mon, Nov 14, 2016 at 05:56:49AM +0100, Michael Matz wrote:
> With this patch there are now no regressions on x86-64-linux (bootstrapped
> with all languages+ada). Okay for trunk?
I build cross-compilers for this for a whole bunch of archs, and built
Linux with that, to see what effect this ha
Hi,
On Sat, 12 Nov 2016, Segher Boessenkool wrote:
> Hi Michael,
>
> On Thu, Oct 20, 2016 at 04:20:09PM +0200, Michael Matz wrote:
> > PR missed-optimization/77881
> > * combine.c (simplify_comparison): Remove useless subregs
> > also inside the loop, not just after it.
> >
> > test
Hi Michael,
On Thu, Oct 20, 2016 at 04:20:09PM +0200, Michael Matz wrote:
> PR missed-optimization/77881
> * combine.c (simplify_comparison): Remove useless subregs
> also inside the loop, not just after it.
>
> testsuite/
> * gcc.target/i386/pr77881.c: New test.
This isn
On 10/20/2016 08:20 AM, Michael Matz wrote:
Hello,
like analyzed in the PR, combine is able to remove outer subregs that
don't do anything interesting in the context they are used
(simplify_comparison). But that currently happens outside of the loop
that retries simplifications if changes occur
Hello,
like analyzed in the PR, combine is able to remove outer subregs that
don't do anything interesting in the context they are used
(simplify_comparison). But that currently happens outside of the loop
that retries simplifications if changes occurred.
When we do that inside the loop as we
