In discussion 2 below for this code fragment:
ALIAS_MANAGER* alias_mgr =
Create_Alias_Manager(MEM_pu_nz_pool_ptr,body);
Dump_alias_mgr(alias_mgr, body, stdout)
Delete_Alias_Manager (alias_mgr , MEM_pu_nz_pool_ptr);
I forgot to mention that:
body = WN_func_body(whirl tree of each of the nodes of the IPA_CALL_GRAPH )
Thanks,
On 9 August 2012 13:36, Siddhartha Jana <siddharthajan...@gmail.com> wrote:
> Hi,
> I am a beginner at Open64 development. I needed some help on the following:
>
> My goal:
> I am trying to access the inter-procedural alias analysis information
> within IPA,
> immediately after the completion of the inlining analysis.
>
> These are my observations and queries:
>
> 1. The Nystrom Alias classification is performed immediately before IPAA,
> within
> the function Perform_Interprocedural_Analysis() [in IPA_main.cxx].
> (this is in alignment with the wiki page on Nystrom Alias Analysis.)
> Here we use the alias analyzer object to perform the alias analysis using
> the function
> solver(). However, in solver, I see that the analysis is NOT
> context-sensitive
> (the BOOL contextSensitive remains FALSE) Could someone please explain
> this?
>
>
> 2. Also, is it true that instantiating the Alias_Manager anytime after the
> Inter-procedural analysis will
> give me access to the alias_analysis information?
> When I did the following at the end of Perform_Interprocedural_Analysis(),
> ALIAS_MANAGER* alias_mgr =
> Create_Alias_Manager(MEM_pu_nz_pool_ptr,body);
> Dump_alias_mgr(alias_mgr, body, stdout)
> Delete_Alias_Manager (alias_mgr , MEM_pu_nz_pool_ptr);
> I get the IR, the point-to info and the alias_id info but none information
> beyond alias_id > 2.(so all I get is the preg aliasing information)
>
>
> 3. Also, while debugging (with -ipa and -Wb,-OPT=nystrom) the call
> to IPA_NystromAliasAnalyzer::aliasAnalyzer()
> returns a NULL within Perform_Interprocedural_Analysis() [in
> IPA_main.cxx].
> Is there a previous point where the ALIAS_MANAGER is called to instantiate
> the NystromAliasAnalyzer class?
>
>
> I would be highly obliged if someone could point me to the right direction.
>
> Awaiting reply,
> Sincerely,
> Siddhartha Jana
> University of Houston
>
>
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