[PATCH GCC][06/13]Preserve loop nest in whole distribution life time

[Bin.Cheng]

On Tue, Jun 13, 2017 at 12:06 PM, Richard Biener
<richard.guenther@gmail.com> wrote:
> On Mon, Jun 12, 2017 at 7:02 PM, Bin Cheng <Bin.Cheng@arm.com> wrote:
>> Hi,
>> This simple patch computes and preserves loop nest vector for whole distribution
>> life time.  The loop nest will be used multiple times in on-demand data dependence
>> computation.
>>
>> Bootstrap and test on x86_64 and AArch64.  Is it OK?
>
> Don't like it too much but I guess we can see if refactoring it back
> to pass down
> loop_nest can work.
The global data is partly to avoid patch conflicts when separating
patches, otherwise several parameters are needed for quite number of
functions.  We can introduce a global distribution data and only pass
it to various functions.

Thanks,
bin
>
> Ok.
>
> Thanks,
> Richard.
>
>> Thanks,
>> bin
>> 2017-06-07  Bin Cheng  <bin.cheng@arm.com>
>>
>>         * tree-loop-distribution.c (loop_nest): New global var.
>>         (build_rdg): Use loop directly, rather than loop nest.
>>         (pg_add_dependence_edges): Remove loop nest parameter.  Use global
>>         variable directly.
>>         (distribute_loop): Compute global variable loop nest.  Update use.