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

[Stepan Dyatkovskiy]

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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