llvm dev - Mar 2011 - [LLVMdev] Memory Dependence Analysis

Hi Tobi,

Thanks for the response, could you point me to the source files of the
memory dependence pass?

Thanks
Nipun

On Mon, Mar 28, 2011 at 2:46 PM, Tobias Grosser
<grosser at fim.uni-passau.de>wrote:
> On 03/28/2011 12:15 PM, Nipun Arora wrote:
> > Hi,
> >
> > I have been trying to run the memdep analysis using opt with the
> > following command: opt -analyze -memdep <*.bc>.
> > However, I keep getting the following error: Pass::print not
implemented
> > for pass: 'Memory Dependence Analysis' ! .
> > I get similar errors for a lot of the analyses passes, which seem as
if
> > they should have a print out?
> >
> > Is there any other memory dependence analysis which gives me a memory
> > dependence graph or something similar via a static analysis, with must
> > or maybe memory dependencies?
>
> Hi Nipon,
>
> you may try Polly[1]. It inclused a pretty sophisticated memory
> dependency analysis for parts of the program, where the control flow is
> statically known. We currently support must_dependences and can
> eliminate transitive dependences. There is also support for
> may_dependences, but it is not yet hooked up to the rest.
>
> If you are interested, an example how to use Polly (and its dependency
> analysis) is shown at the bottom of this wiki page[1]. If you need
> further help let me know.
>
> Cheers
> Tobi
>
>
> [1] http://wiki.llvm.org/Polly
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>


-- 
Nipun Arora
Doctoral Student
Dept. of Computer Science
Columbia University
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On 03/31/2011 02:38 PM, Nipun Arora wrote:
> Hi Tobi,
>
> Thanks for the response, could you point me to the source files of the
> memory dependence pass?
It is part of the Polly source code. Polly is not yet part of the main 
LLVM repository, but is available in its own git repository. You can 
find details how to install Polly on the Polly wiki page[1]. If you need 
any help let me know.

After you checked out Polly, it is available in lib/Dependences.cpp

Cheers
Tobi

[1] http://wiki.llvm.org/Polly