Calls to llvm.core `alloca` incorrectly assume second positional argument is `name`.

[spearsem]

In [2]: from numpile import autojit

In [3]: %cpaste
Pasting code; enter '--' alone on the line to stop or use Ctrl-D.
:@autojit
:def dot(a, b):
:    c = 0
:    n = a.shape[0]
:    for i in range(n):
:       c += a[i]*b[i]
:    return c
:--

In [4]: %cpaste
Pasting code; enter '--' alone on the line to stop or use Ctrl-D.
:a = np.array(range(1000,2000), dtype='int32')
:b = np.array(range(3000,4000), dtype='int32')
:
:print dot(a,b)
:--
---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
<ipython-input-4-c2f171281c61> in <module>()
      2 b = np.array(range(3000,4000), dtype='int32')
      3 
----> 4 print dot(a,b)

/Users/ely_spears/scratch/python/numpile/numpile.py in _wrapper(*args)
    956                 return function_cache[key](*args)
    957             else:
--> 958                 llfunc = codegen(ast, specializer, retty, argtys)
    959                 pyfunc = wrap_module(argtys, llfunc)
    960                 function_cache[key] = pyfunc

/Users/ely_spears/scratch/python/numpile/numpile.py in codegen(ast, specializer, retty, argtys)
    976 def codegen(ast, specializer, retty, argtys):
    977     cgen = LLVMEmitter(specializer, retty, argtys)
--> 978     mod = cgen.visit(ast)
    979     cgen.function.verify()
    980 

/Users/ely_spears/scratch/python/numpile/numpile.py in visit(self, node)
    795         name = "visit_%s" % type(node).__name__
    796         if hasattr(self, name):
--> 797             return getattr(self, name)(node)
    798         else:
    799             return self.generic_visit(node)

/Users/ely_spears/scratch/python/numpile/numpile.py in visit_Fun(self, node)
    686         # Setup the register for return type.
    687         if rettype is not void_type:
--> 688             self.locals['retval'] = self.builder.alloca(rettype, "retval")
    689 
    690         map(self.visit, node.body)

/Users/ely_spears/anaconda/envs/basic27/lib/python2.7/site-packages/llvm/core.pyc in alloca(self, ty, size, name)
   2323 
   2324     def alloca(self, ty, size=None, name=""):
-> 2325         sizeptr = size._ptr if size else None
   2326         return _make_value(self._ptr.CreateAlloca(ty._ptr, sizeptr, name))
   2327 

AttributeError: 'str' object has no attribute '_ptr'

Here is the conda info dump for this environment:

(basic27)ely_spears@macbook:~/scratch/python/numpile$ conda list -e
# This file may be used to create an environment using:
# $ conda create --name <env> --file <this file>
# platform: osx-64
astroid=1.2.1=py27_0
dateutil=2.1=py27_2
flask=0.10.1=py27_1
freetype=2.4.10=1
ipython=2.0.0=py27_0
itsdangerous=0.24=py27_0
jinja2=2.7.3=py27_1
libpng=1.5.13=1
llvm=3.3=0
llvmpy=0.12.7=py27_0
logilab-common=0.62.1=py27_1
markupsafe=0.23=py27_0
matplotlib=1.4.2=np19py27_0
mock=1.0.1=py27_0
nose=1.3.4=py27_0
numpy=1.9.1=py27_0
openssl=1.0.1k=0
pandas=0.14.1=np19py27_0
pip=1.5.6=py27_0
pylint=1.3.1=py27_0
pyodbc=3.0.7=py27_0
pyparsing=2.0.1=py27_0
python=2.7.9=1
python.app=1.2=py27_3
pytz=2014.9=py27_0
readline=6.2=2
scikit-learn=0.15.2=np19py27_0
scipy=0.14.0=np19py27_0
seaborn=0.5.0=np19py27_0
setuptools=7.0=py27_0
six=1.8.0=py27_0
sqlite=3.8.4.1=0
tk=8.5.15=0
werkzeug=0.9.6=py27_1
zlib=1.2.8=0

[spearsem]

I have a fix for this. It looks like all of the places that make use of builder.alloca and require a name argument need it to be a keyword argument, name=... rather than positional. Positionally, at least with the version I have, the second argument is expected to be some kind of pointer object, while the third argument will be the name. I changed this in 3 places and it works.

I have a local branch with these fixes; willing to push to a new remote branch for a PR, however it might just be easier for you to make the changes (and perhaps I am overlooking something).

[sdiehl]

This must be change between llvmpy 0.11 and 0.12. If you submit the PR I can probably see if the change is compatible.

[cdeil]

@spearsem or @sdiehl - Please close this old issue. (no longer relevant, llmvpy is no longer used)

[pfalcon]

Actually, the issue was fixed by @sdiehl even before llvmlite migration, in 1e2fc4296b6b59c35a066ad74b5fb757b3e5a205. +1 for closing this.