daisytuner / docc / 19595073613

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Improving tt transform (#342)

* New, dynamic opt-report collecting, where each participating pass / transform can emit infos, like inapplicable-reasons etc. while they are going and optReport pass will just read it out after the fact.

 * currently prevents us from giving all options (CUDA, TT, CPU-Par possible), as we can only run one of the transforms right now (need to be 2-pass to restore that)
 * CUDA and TT Transform now give reasons

* Using new dynamic opt-report instead of the old one

 * sdfg_registry for_each now exposes the holder for stable references
 * using new, dynamic opt report.
 - only showing one of the target transforms, instead of all of them, with differing report format and names

* New combined LoopnestOffloadingPass, which internally handles the 3 alternatives of CPU-parallel, CUDA, TT transform.

 + We now share the loopnest code, the post processing code, which includes movement elim.
 + we can now run multiple transform tests and then choose which to apply. No more repeating of test.
 ~ restored old opt-report output in addition to the new, enhanced general transformations reporting
 + cmd_args for llvm args that are used across multiple code units.

* Fixed cmd option spelling and help text

* Updating to merged libs

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/plugin_llvm/src/passes/scheduling/loopnest_offloading_pass.cpp


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