llvm dev - Jun 2011 - [LLVMdev] run -mem2reg and -reg2mem programmably from within a Pass

I am currently building a BasicBlock pass which requires to run -reg2mem 
before it, and need to run -mem2reg after it to clean up.

So, I want to specify -reg2mem as one of the pre-requisite passes to it, as:


class MyPass: public BasicBlockPass{

   virtual void getAnalysisUsage(AnalysisUsage &AU){
     ...
AU.addRequired<RegToMem>();
     ...
   }

};


I searched all passes under the lib/Transform directory, but didn't find 
a single case of my expected usage.
Though I know opt takes both -reg2mem and -mem2reg as valid arguments 
and does the proper transformation, I didn't figure out how it is being 
done.


What is the right way of doing this?
(Or, is there a different way doing it?)


Thank you very  much


Chuck

-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://lists.llvm.org/pipermail/llvm-dev/attachments/20110619/3ba77f48/attachment.html>

I guess AU.addRequiredID(DemoteRegisterToMemoryID) would do the trick.

- xi

On Jun 19, 2011, at 11:03 PM, Chuck Zhao wrote:
> I am currently building a BasicBlock pass which requires to run -reg2mem
before it, and need to run -mem2reg after it to clean up.
> 
> So, I want to specify -reg2mem as one of the pre-requisite passes to it,
as:
> 
> 
> class MyPass: public BasicBlockPass{
> 
>   virtual void getAnalysisUsage(AnalysisUsage &AU){
>     ...
>     AU.addRequired<RegToMem>();
>     ...
>   }
> 
> };
> 
> 
> I searched all passes under the lib/Transform directory, but didn't
find a single case of my expected usage.
> Though I know opt takes both -reg2mem and -mem2reg as valid arguments and
does the proper transformation, I didn't figure out how it is being done.
> 
> 
> What is the right way of doing this?
> (Or, is there a different way doing it?)
> 
> 
> Thank you very  much
> 
> 
> Chuck
> 
> _______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev

Xi,

Thank you for the comments.

I also found a recent comment (from John Criswell) on Transformation 
Pass as a pre requisite:

http://comments.gmane.org/gmane.comp.compilers.llvm.devel/35640

My problem is now solved :-)

Chuck

On 6/19/2011 11:19 PM, Xi Wang wrote:
> I guess AU.addRequiredID(DemoteRegisterToMemoryID) would do the trick.
>
> - xi
>
> On Jun 19, 2011, at 11:03 PM, Chuck Zhao wrote:
>
>> I am currently building a BasicBlock pass which requires to run
-reg2mem before it, and need to run -mem2reg after it to clean up.
>>
>> So, I want to specify -reg2mem as one of the pre-requisite passes to
it, as:
>>
>>
>> class MyPass: public BasicBlockPass{
>>
>>    virtual void getAnalysisUsage(AnalysisUsage&AU){
>>      ...
>>      AU.addRequired<RegToMem>();
>>      ...
>>    }
>>
>> };
>>
>>
>> I searched all passes under the lib/Transform directory, but didn't
find a single case of my expected usage.
>> Though I know opt takes both -reg2mem and -mem2reg as valid arguments
and does the proper transformation, I didn't figure out how it is being
done.
>>
>>
>> What is the right way of doing this?
>> (Or, is there a different way doing it?)
>>
>>
>> Thank you very  much
>>
>>
>> Chuck
>>
>> _______________________________________________
>> 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