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

[Richard Biener]

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.

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.