[PATCH PR70935, Regression 6,7]

[Richard Biener]

On Thu, May 5, 2016 at 5:19 PM, Yuri Rumyantsev <ysrumyan@gmail.com> wrote:
> Hi All,
>
> Here is a simple patch which cures the problem with nonlegal
> transformation of endless loop. THe fix is simply check that guard
> edge destination is not loop latch block.
>
> Bootstrapping and regression testing did not show any new failures.
> Is it OK for trunk?

Ok for trunk and branch.

THanks,
RIchard.

> ChangeLog:
> 2016-05-05  Yuri Rumyantsev  <ysrumyan@gmail.com>
>
> PR debug/70935
> * tree-ssa-loop-unswitch.c (find_loop_guard): Reject guard edge with
> loop latch destination.
>
> gcc/testsuite/ChangeLog
> * gcc.dg/torture/pr70935.c: New test.