Here is updated patch with splitting long line.
The patch is attached.

Yuri.

2015-10-13 15:38 GMT+03:00 H.J. Lu <hjl.tools@gmail.com>:
> On Tue, Oct 13, 2015 at 4:57 AM, Yuri Rumyantsev <ysrumyan@gmail.com> wrote:
>> Hi All,
>>
>> Here is a simple patch for unswitching outer loop through guard-edge
>> hoisting. The check that guard-edge is around the inner loop was
>> missed.
>>
>> Bootstrapping and regression testing did not show new failures.
>>
>> Is it OK for trunk?
>>
>> ChangeLog:
>> 2014-10-13  Yuri Rumyantsev  <ysrumyan@gmail.com>
>>
>> PR tree-optimization/67909, 67947
>> * tree-ssa-loop-unswitch.c (find_loop_guard): Add check that GUARD_EDGE
>> really skip the inner loop.
>>
>> gcc/testsuite/ChangeLog
>> * gcc.dg/torture/pr67947.c: New test.
>
> +  /* Guard edge must skip inner loop.  */
> +  if (!dominated_by_p (CDI_DOMINATORS, loop->inner->header,
> +      guard_edge == fe ? te->dest : fe->dest))
>         ^^^^  It should line up with "CDI_DOMINATORS".
>
> + fprintf (dump_file, "Guard edge %d --> %d is not around the
> loop!\n",guard_edge->src->index,guard_edge->dest->index);
>
> Please break lone line.
>
> --
> H.J.