On 04/06/15 10:28, Tom de Vries wrote:
>> I'm ok with the patch and count on you to fix eventual fallout ;)
>>
>
> Great, will do.

And here is the fallout:
* PR66442 - [6 regression] FAIL: gcc.dg/autopar/pr46885.c (test for
   excess errors)

There are two problems in try_transform_to_exit_first_loop_alt:
1. In case the latch is not a singleton bb, the function should return
    false rather than true.
2. The check for singleton bb should ignore debug-insns.

Attached patch fixes these problems.

Bootstrapped and reg-tested on x86_64.

Verified by Andreas to fix the problem on m68k.

OK for trunk?

Thanks,
- Tom