[llvm-commits] [LLVM, opt, LoopUnswitch] Compile-time improvements.

[Stepan Dyatkovskiy]

Ping.

-Stepan.

04.01.2012, 12:16, "Stepan Dyatkovskiy" <STPWORLD at narod.ru>:
> Ping.
> -Stepan
>
> 03.01.2012, 22:50, "Stepan Dyatkovskiy" <STPWORLD at narod.ru>:
>
>>  Ping.
>>  -Stepan.
>>
>>  02.01.2012, 13:53, "Stepan Dyatkovskiy" <STPWORLD at narod.ru>:
>>>   ping.
>>>   -Stepan.
>>>
>>>   30.12.2011, 16:14, "Stepan Dyatkovskiy" <stpworld at narod.ru>:
>>>>    Hi. A made some fixes that improves compile-time:
>>>>
>>>>    1. Size heuristics changed. Now we calculate number of unswitching
>>>>    branches only once per loop.
>>>>    2. Some checks was moved from UnswitchIfProfitable to
>>>>    processCurrentLoop, since it is not changed during processCurrentLoop
>>>>    iteration. It allows decide to skip some loops at an early stage.
>>>>
>>>>    I checked the compile-time on test
>>>>
>>>>    MultiSource/Benchmarks/Prolangs-C++/shapes/shapes
>>>>    (there was compile time regression after my previous patch).
>>>>
>>>>    Relative to my previous patch the compile-time improved on ~8.5%. Relative
>>>>    to old revisions (before r146578) the compile time is improved on ~2%.
>>>>
>>>>    Please find the patch in attachment for review.
>>>>
>>>>    -Stepan.
>>>>
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