[PATCH GCC][01/13]Introduce internal function IFN_LOOP_DIST_ALIAS

[Bin.Cheng]

On Mon, Jun 12, 2017 at 6:02 PM, Bin Cheng <Bin.Cheng@arm.com> wrote:
> Hi,
> I was asked by upstream to split the loop distribution patch into small ones.
> It is hard because data structure and algorithm are closely coupled together.
> Anyway, this is the patch series with smaller patches.  Basically I tried to
> separate data structure and bug-fix changes apart with one as the main patch.
> Note I only made necessary code refactoring in order to separate patch, apart
> from that, there is no change against the last version.
>
> This is the first patch introducing new internal function IFN_LOOP_DIST_ALIAS.
> GCC will distribute loops under condition of this function call.
>
> Bootstrap and test on x86_64 and AArch64.  Is it OK?
Hi,
I need to update this patch fixing an issue in
vect_loop_dist_alias_call.  The previous patch fails to find some
IFN_LOOP_DIST_ALIAS calls.

Bootstrap and test in series.  Is it OK?

Thanks,
bin
>
> Thanks,
> bin
> 2017-06-07  Bin Cheng  <bin.cheng@arm.com>
>
>         * cfgloop.h (struct loop): New field ldist_alias_id.
>         * cfgloopmanip.c (lv_adjust_loop_entry_edge): Comment change.
>         * internal-fn.c (expand_LOOP_DIST_ALIAS): New function.
>         * internal-fn.def (LOOP_DIST_ALIAS): New.
>         * tree-vectorizer.c (vect_loop_dist_alias_call): New function.
>         (fold_loop_dist_alias_call): New function.
>         (vectorize_loops): Fold IFN_LOOP_DIST_ALIAS call depending on
>         successful vectorization or not.
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