On 11/30/20 5:03 PM, Michael Matz wrote:
> Hello,
>
> On Mon, 30 Nov 2020, Jeff Law wrote:
>
So, then let's start with one of
the prime examples of SSA deconstruction problems, the lost swap, and how
it comes to be: we start with a swap:
x = ..., y = ...
if
Michael Matz writes:
> Hello,
>
> On Mon, 30 Nov 2020, Jeff Law wrote:
>
>> >> So, then let's start with one of
>> >> the prime examples of SSA deconstruction problems, the lost swap, and how
>> >> it comes to be: we start with a swap:
>> >>
>> >> x = ..., y = ...
>> >> if (cond)
>> >>
Hello,
On Mon, 30 Nov 2020, Jeff Law wrote:
> >> So, then let's start with one of
> >> the prime examples of SSA deconstruction problems, the lost swap, and how
> >> it comes to be: we start with a swap:
> >>
> >> x = ..., y = ...
> >> if (cond)
> >> tmp=x, x=y, y=tmp
> >>
> >> (1)
On 11/27/20 9:31 AM, Richard Sandiford via Gcc-patches wrote:
> Michael Matz writes:
>> Hello,
>>
>> On Thu, 26 Nov 2020, Richard Sandiford via Gcc-patches wrote:
>>
> The aim is only to provide a different view of existing RTL instructions.
> Unlike gimple, and unlike (IIRC) the old
Jeff Law writes:
> On 11/26/20 9:03 AM, Richard Sandiford wrote:
>> Thanks for the reviews.
>>
>> Jeff Law via Gcc-patches writes:
>>> On 11/13/20 1:10 AM, Richard Sandiford via Gcc-patches wrote:
Just after GCC 10 stage 1 closed (oops), I posted a patch to add a new
combine pass. One
On 11/26/20 9:03 AM, Richard Sandiford wrote:
> Thanks for the reviews.
>
> Jeff Law via Gcc-patches writes:
>> On 11/13/20 1:10 AM, Richard Sandiford via Gcc-patches wrote:
>>> Just after GCC 10 stage 1 closed (oops), I posted a patch to add a new
>>> combine pass. One of its main aims was
Michael Matz writes:
> Hello,
>
> On Thu, 26 Nov 2020, Richard Sandiford via Gcc-patches wrote:
>
>> >> The aim is only to provide a different view of existing RTL instructions.
>> >> Unlike gimple, and unlike (IIRC) the old RTL SSA project from way back,
>> >> the new framework isn't a “native”
Hello,
On Thu, 26 Nov 2020, Richard Sandiford via Gcc-patches wrote:
> >> The aim is only to provide a different view of existing RTL instructions.
> >> Unlike gimple, and unlike (IIRC) the old RTL SSA project from way back,
> >> the new framework isn't a “native” SSA representation. This means
Thanks for the reviews.
Jeff Law via Gcc-patches writes:
> On 11/13/20 1:10 AM, Richard Sandiford via Gcc-patches wrote:
>> Just after GCC 10 stage 1 closed (oops), I posted a patch to add a new
>> combine pass. One of its main aims was to allow instructions to move
>> around where necessary in
On 11/13/20 1:10 AM, Richard Sandiford via Gcc-patches wrote:
> Just after GCC 10 stage 1 closed (oops), I posted a patch to add a new
> combine pass. One of its main aims was to allow instructions to move
> around where necessary in order to make a combination possible.
> It also tried to
Just after GCC 10 stage 1 closed (oops), I posted a patch to add a new
combine pass. One of its main aims was to allow instructions to move
around where necessary in order to make a combination possible.
It also tried to parallelise instructions that use the same resource.
That pass contained
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