[PATCH GCC][2/7]Don't rename variables for deleted new preheader

[Richard Biener]

On Thu, Oct 5, 2017 at 3:15 PM, Bin Cheng <Bin.Cheng@arm.com> wrote:
> Hi,
> I noticed that new_preheader basic block could be deleted if the copied
> loop is added at entry in function slpeel_tree_duplicate_loop_to_edge_cfg.
> This simple patch skips new_preheader during variable renaming if it is
> deleted.
> Bootstrap and test in patch set on x86_64 and AArch64, is it OK?

Ok.

Richard.

> Thanks,
> bin
> 2017-10-04  Bin Cheng  <bin.cheng@arm.com>
>
>         * tree-vect-loop-manip.c (slpeel_tree_duplicate_loop_to_edge_cfg): Skip
>         renaming variables in new preheader if it's deleted.