Minutes_2019_05_28

Attendees: Stan, Val, Todd, Siu, Stuart

0. Feature Discussion

Actions from last meeting:
- stuart: ticket for rewriting internals of functions that could be @overload'd
  - need to do still
- stuart: legalize IR just prior to lowering (run postproc and compare)
  - much collateral damage
  - may be able to switch on soon
  - need richer IR comparison (IR diffs that understand "logical equivalence", but only approximately)
- stuart: fix array inliner bad ir.Del emission
  - moving forward
- siu: #4092 pointer moves in CUDA context
  - See PR #4114
  - still failing build farm
- stan: #4086 user question about shuffling strings
  - responded and issue is closed
icc_rt builds to main
- Stan will relabel
Any blockers for Numba 0.44.0 release on Thursday?
- Stan will update final release checklist
capstone
- Linking Numba IR to LLVM IR to assembly mostly working
- capstone is a reverse engineering tool
- Can determine when SIMD is being used with specific loops
- capstone could use a conda package
fixing numba-integration-testing on hpat (next time?)
- HPAT repo moved
- Val will ping both Todd and Ehsan in future
Numba 0.45 Planning
- July 1 release candidate
- Main feature focus:
  - Val: Typed list, typed set is bonus
  - Stuart: Compiler rewrite passes
  - Siu: Caching

#4123 - Use Apply + Numba is possible?
#4122 - Multi-threading example slow
#4121 - np.mean ans np.einsum not supported by numba
#4120 - cannot work for view_as_windows
#4119 - not helping for np.convolve
#4117 - Exponentially increasing compilation time
*** #4115 - CFFI void* in nopython mode, determine Numba type of _cffi_backend.CData
- Common use case
- How to deal with void pointer management and wrapping?
- Siu will add comments on specific tasks needed
#4111 - NUMBA_ENABLE_CUDASIM broken with record arrays
#4109 - Add support for range as argument to contains
*** #4108 - incorrect handling of array.shape with nopython=True
- related to #4113
- should sort this out by removing static_getitem rewrite pass and do something with literals when we need to
- "Poison types"
#4102 - Numba release 0.44 release checklist

#4116 - cannot reassign the value to the elements of vector
#4106 - Numba 0.44 RC1 checklist
#4103 - Depend on enum34 using PEP 508 environment markers
#4101 - Error: "cannot import vectorize from numba" after "python numba_test.py"