[llvm-commits] [LLVM, loop-unswitch, bugfix for #11429] Wrong behaviour for switches.

[Stepan Dyatkovskiy]

Moved to another thread: "[LLVM, opt, LoopUnswitch] Compile-time 
improvements".

-Stepan.

Stepan Dyatkovskiy wrote:
> 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 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.