Minutes_2019_03_26

Attendees: Ehsan, Val, Siu, Stuart, Todd

0. Feature Discussion

• 0.43.1 release
  • Any confirmation or complaints?
    • umap ok
  • Proceed to tag today?
    • xfail ediff1d test, then tag
• Anton's aliasing problem...
  • np.shares_memory and np.may_share_memory possible functions to help.
  • need intrinsic to get data pointer for pointer-arithmetic
  • ctypes ary.ctypes.data : intp? val help
  • example:

    def kernel(*args):
         if no_alias(*args):
             optimal(*args)
         else:
             not_optimal(*args)

• func_ir.get_definitions() problems
  • problem example:

    def doit(x):
        return x
    
    def bar(pred):
        if pred:
            foo = True
        else:
            foo = False
        # do something with foo
        return doit(foo)

  • new variable names for foo in different branches
  • basically going towards SSA
  • this will fix many issues
  • hint: interpreter.py and dominator tree & dominance frontier

1. New issues

• #3898 - np.ediff1d stricter type checking than numpy
  • will depend on numpy fixing it up
• #3896 - More than one definition bug
  • why we need SSA
• #3895 - Initialization of lists and a scalar on the same line fails
  • TODO: try dropping the asserts in typeinfer
• #3891 - Implement swapaxes
• #3889 - Numba 0.43.1 RC checklist
• #3888 - np.random.choice doesn't adhere to np.random.seed inside of numba
  • there's a open PR to fix this

Already Closed

• empty

2. Open PRs

• #3901 - Wrap conditionals in truth to create predicates.
  • WIP
• #3900 - [WIP] Fix 3457 :: Implements np.repeat
• #3899 - WIP: Support for np.quantile and np.nanquantile
• #3897 - Fixes numba#3888.
  • choice seed problem. need tests
• #3894 - Fix array inliner for multiple array definition.
  • ready to merge
  • "hide" the issue. need the SSA
• #3893 - Fix casting in namedtuple ctor.
  • Siu is reviewing
• #3890 - WIP: Add support for np.delete
• #3887 - Add tolerance to network errors by permitting conda to retry

already merged

• #3892 - Change log update for 0.43.1
• #3886 - Use safe_load from pyyaml.for llvmlite 0.29

Old Active

See https://github.com/numba/numba/projects/10

4. Next Release: Version 0.44, RC=ASAP, Final=ASAP+1 week

• LLVM 8
  • fixes twine bug
  • fixes common symbol bug
• Caching improvements requirement gathering
  • transitive dependency
  • bug related to storing runtime-only info
  • may punt on jitclasses
  • may punt on issues of (g)ufunc
  • future: pre-filled/package-able cache
    • open questions:
      • numba version pinning(?)
      • regen cache for different numba versions
      • regen at post-install