Minutes_2020_03_03

Numba Meeting: 2020-03-03

Attendees: Stuart, Ehsan, Aaron, Graham, Gui, Pearu, Todd

Parfor refactoring PRs in review queue
- preparing for SSA
Public APIs
First class Function Type
- Needs another iteration
- Problems because Function Type is mutable
CUDA CI
- on going... after GTC

** #5336 - NativeValue.cleanup doesn't seem to be used consistently
- needs a deeper look
- summarizes implementation problem of many (un)boxing functions
- need to properly define (un)box machinery
- Ehsan also find exception propagation from C or Python C-API is not clear
- I.e. nested array of list of string
- Needs to deal with a mix of PyObjects and compiled objects.
- May need to do an overhaul for the entire (un)boxing machinery
** #5335 - Memory leak in intrinsic with temporary list object
- problem with one of the refcount pruning pass.
- future direction: explore refcount pruning as LLVM pass
#5332 - literal_unroll for IntegerLiteral
- feature request
#5331 - Calling np.dot with integer arrays
- question, performance warning issue, implement integer.
#5329 - Vectorization of structured types appears to be broken
- unsupported in numpy type system
#5324 - Build failed: fatal error: omp.h: No such file or directory
- FNV hash not implemented, Fix in PR #5327, #5326
#5322 - literal_unroll needs to know about types.Named*Tuple
- Fix in PR #5325
#5321 - literal_unroll fails with jitclass
- bug, fix via banning it
**** #5312 - [cuda] more accurate debuginfo
- task
**** #5311 - [cuda] lineinfo for device function
- task
- looks like cuda regression
#5306 - uninitialized typed-list extending iterable that cannot be sliced
- bug

draft
- #5337 - Add NRT_debug_refcount
parfor refactoring
- #5330 - refactor common operation in parfor lowering into a new util
- #5320 - refactor array_analysis
Abandoned/Testing-only
- #5307 - Temp/pr/4967
- #5315 - [ci_test] Temp/pr/5294 2
others:
- #5334 - Fix incorrect condition in tuple unboxing
  - ready for review
- #5333 - Add: highlight Numba IR dump
  - ready for review
- ** #5328 - [WIP] NBEP 7: External Memory Management Plugin Interface
- #5327 - Add warning if FNV hashing is found as the default for CPython.
  - ready for quick review
- #5326 - Update installation docs with OpenMP requirements.
  - ready for quick review
- #5325 - Let literal_unroll accept types.Named*Tuple
  - ready for quick review
- #5309 - support for function calls with *args and named kwargs
  - ready for review
- #5308 - Provide numba.extending.is_jitted
  - ready to merge
- #5305 - [WIP] Add support for numpy insert
  - wip