[Bug tree-optimization/61743] [5 Regression] Complete unroll is not happened for loops with short upper bound

[ysrumyan at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61743

--- Comment #10 from Yuri Rumyantsev <ysrumyan at gmail dot com> ---
Richard,

Do you have any progress?

Thanks.

2014-08-13 12:35 GMT+04:00 rguenth at gcc dot gnu.org
<gcc-bugzilla@gcc.gnu.org>:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61743
>
> --- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
> (In reply to Yuri Rumyantsev from comment #8)
>> Richard,
>>
>> I tested both proposed fixes and i turned out that the first one is
>> preferable since performance of benchmark came back. Note that hoisting 2nd
>> vrp pass gave us another 14% slowdown but I did not investigate it.
>>
>> Should I tested your fix or you do it yourself?
>
> I'd like to explore on how to make it a little more "generic", it's a very
> special hack as-is.
>
>> Thanks.
>
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