llvm dev - Oct 2014 - [LLVMdev] how to choose which alias analysis used in my pass?

Hi,

   I want to use memory dependence analysis in my pass, but I feel the 
default alias analysis is not precise enough. How could I choose to use 
another alias analysis algorithm? I have tried opt -load mypass.so 
-basicaa xx.bc > /dev/null. But I feel the alias analysis algorithm does 
not change. Do I need to add something in my codes?

   Thanks a lot!

   Best,

                                                               Linhai

Isn't -basicaa the default alias analysis already?

Jingyue

On Wed Oct 15 2014 at 6:42:59 AM songlh <songlh at cs.wisc.edu> wrote:
> Hi,
>
>    I want to use memory dependence analysis in my pass, but I feel the
> default alias analysis is not precise enough. How could I choose to use
> another alias analysis algorithm? I have tried opt -load mypass.so
> -basicaa xx.bc > /dev/null. But I feel the alias analysis algorithm does
> not change. Do I need to add something in my codes?
>
>    Thanks a lot!
>
>    Best,
>
>                                                                Linhai
> _______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
>
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----- Original Message -----
> From: "Jingyue Wu" <jingyue at google.com>
> To: "songlh" <songlh at cs.wisc.edu>, llvmdev at
cs.uiuc.edu
> Sent: Wednesday, October 15, 2014 2:50:12 PM
> Subject: Re: [LLVMdev] how to choose which alias analysis used in my pass?
> 
> 
> Isn't -basicaa the default alias analysis already?
No, -basicaa is added (along with several others) when -O3 (or similar) is
provided, but you'll only get -noaa if you run opt without specifying
anything else.

 -Hal
> 
> Jingyue
> 
> 
> On Wed Oct 15 2014 at 6:42:59 AM songlh < songlh at cs.wisc.edu >
wrote:
> 
> 
> Hi,
> 
> I want to use memory dependence analysis in my pass, but I feel the
> default alias analysis is not precise enough. How could I choose to
> use
> another alias analysis algorithm? I have tried opt -load mypass.so
> -basicaa xx.bc > /dev/null. But I feel the alias analysis algorithm
> does
> not change. Do I need to add something in my codes?
> 
> Thanks a lot!
> 
> Best,
> 
> Linhai
> ______________________________ _________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/ mailman/listinfo/llvmdev
> 
> _______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
> 
-- 
Hal Finkel
Assistant Computational Scientist
Leadership Computing Facility
Argonne National Laboratory