[LLVMdev] loop carried dependence analysis?

[Benjamin Kramer]

On 13.11.2012, at 10:46, erkan diken <erkandiken at gmail.com> wrote:

Hi all,

Unfortunately, all my Hunks are failed when I apply : patch -p1 < da.patch
command.

The problem might be due to the fact that da.patch file was created against
revision 167549, but I am on revision 167719 (I believe the most recent
one).
I am not sure if this cause the problem ? But Preston may I ask you to
generate the patch file against revison 167719  ?

Thanks in advance.


The patch to print all dependences is in trunk, you don't need the patch
for it anymore.

Related thread:
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20121112/155651.html

- Ben



On Tue, Nov 13, 2012 at 9:41 AM, Arnaldo <arnaldo.cruz at upr.edu> wrote:

> Preston, thanks for the explanation and patch.  Now it's printing the
> direction and distance values.
>
>
> On Tue, Nov 13, 2012 at 12:22 PM, Preston Briggs <preston.briggs at gmail.com
> > wrote:
>
>> Erkan, you're right. Sorry about that.
>> Attached is the most recent version.
>>
>> Preston
>>
>>
>>
>> Hi Preston,
>>> I am trying to use DA as well. I used your example and commands that you
>>> wrote in order to get DA information.
>>> However, it does not report any dependence info.
>>> I am wondering whether your local copy differs from the one on the
>>> repository ?
>>> Thanks.
>>> Erkan.
>>
>>
>>
>> ---------- Forwarded message ----------
>> From: Preston Briggs <preston.briggs at gmail.com>
>> Date: Wed, Nov 7, 2012 at 12:51 PM
>> Subject: DependenceAnalysis patch
>> To: "llvm-commits at cs.uiuc.edu" <llvm-commits at cs.uiuc.edu>, Chandler
>> Carruth <chandlerc at google.com>, Hal Finkel <hfinkel at anl.gov>, Benjamin
>> Kramer <benny.kra at gmail.com>
>>
>>
>> Here's a patch that covers the problems reported by Chandler last week.
>> It checks the base pointer of each GEP to be sure they are loop
>> invariant. The patch also updates the -analyze functionality so that all
>> pairs of memory references are tested. Finally, all the test cases have
>> been updated.
>>
>> I haven't yet updated DA to analyze pairs of pointer dereferences. I
>> wanted to get the initial correction in place first. I also expect that
>> analyzer pointer derefs will benefit from delinearization and am hoping it
>> gets incorporated soon.
>>
>> If someone could review this change and check it in, if appropriate, I'd
>> be obliged.
>>
>> Thanks,
>> Preston
>>
>>
>>
>


-- 
Best Regards,
Erkan Diken
------------------

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