[Cython] Control flow graph
Dag Sverre Seljebotn
dagss at student.matnat.uio.no
Tue Feb 15 09:49:02 CET 2011
On 02/15/2011 08:21 AM, Robert Bradshaw wrote:
> On Mon, Feb 14, 2011 at 9:49 PM, Vitja Makarov<vitja.makarov at gmail.com> wrote:
>> 2011/2/15 Robert Bradshaw<robertwb at math.washington.edu>:
>>> On Sun, Feb 13, 2011 at 11:40 PM, Vitja Makarov<vitja.makarov at gmail.com> wrote:
>>>> In order to implement "reaching definitions" algorithm.
>>>> I'm now working on control-flow (or data-flow) graph.
>>>> Here is funny picture made with graphviz ;)
>>> Cool. Any plans on handling exceptions?
>> Sure, but I don't have much time for this :(
>> Linear block inside try...except body should be split by assignments
>> and each subblock should point to exception handling entry point.
> Would every possible failing sub-expression have to point to the
> exception handling point(s)? I suppose it depends on whether you'll be
> handling more than assignment tracking.
>> As result I want to have set of possible assignments for each NameNode position.
>> So handling of uninitialized variables, unused, unused results should be easy,
>> later it may help to implement local variable deletion. And guess that
>> could help type inference.
I'm thinking that transforming NameNode + various assignment/lookup
nodes into "opcode nodes" such as SetLocalNode, GetLocalNode,
SetGlobalNode, GetAttributeNode and so on would be a natural step to
make such code cleaner. Then (after an isolated transform doing this)
the logic would just need to act on individual nodes, not combination of
Just an idea.
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