llvm dev - Jun 2011 - [LLVMdev] How to disable pass grouping(scheduling)

Hi all,

Llvm can automatically group a list passes. I want to do some  
experiment to see the difference between grouping and non-grouping  
execution.
Considering the following example, if I want to apply transformation  
A, B and C. The execution order is:
   A.doInitialization();
   B.doInitialization();
   C.doInitialization();
   A.runOnFunction();
   B.runOnFunction();
   C.runOnFunction();
   A.doInitialization();
   B.doInitialization();
   C.doInitialization();

Is it possible to disable the grouping? Make it execute as:

   A.doInitialization();
   A.runOnFunction();
   A.doInitialization();
   B.doInitialization();
   B.runOnFunction();
   B.doInitialization();
   C.doInitialization();
   C.runOnFunction();
   C.doInitialization();

Thanks,

Kecheng

On 6/28/11 11:35 PM, kecheng at cecs.pdx.edu wrote:
> Hi all,
>
> Llvm can automatically group a list passes. I want to do some
> experiment to see the difference between grouping and non-grouping
> execution.
> Considering the following example, if I want to apply transformation
> A, B and C. The execution order is:
>     A.doInitialization();
>     B.doInitialization();
>     C.doInitialization();
>     A.runOnFunction();
>     B.runOnFunction();
>     C.runOnFunction();
>     A.doInitialization();
>     B.doInitialization();
>     C.doInitialization();
>
> Is it possible to disable the grouping? Make it execute as:
>
>     A.doInitialization();
>     A.runOnFunction();
>     A.doInitialization();
>     B.doInitialization();
>     B.runOnFunction();
>     B.doInitialization();
>     C.doInitialization();
>     C.runOnFunction();
>     C.doInitialization();
>
> Thanks,
You can run opt three times (one for each pass A, B, and C), piping them 
together so that the output of one is the input to the next.

-- John T.
> Kecheng
>
>
>
> _______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev

Thanks John, this is an easy way to achieve this goal, but I'm  
wondering if this is the only way? I have around 100 passes.

Quoting John Criswell <criswell at illinois.edu>:
> On 6/28/11 11:35 PM, kecheng at cecs.pdx.edu wrote:
>> Hi all,
>>
>> Llvm can automatically group a list passes. I want to do some
>> experiment to see the difference between grouping and non-grouping
>> execution.
>> Considering the following example, if I want to apply transformation
>> A, B and C. The execution order is:
>>    A.doInitialization();
>>    B.doInitialization();
>>    C.doInitialization();
>>    A.runOnFunction();
>>    B.runOnFunction();
>>    C.runOnFunction();
>>    A.doInitialization();
>>    B.doInitialization();
>>    C.doInitialization();
>>
>> Is it possible to disable the grouping? Make it execute as:
>>
>>    A.doInitialization();
>>    A.runOnFunction();
>>    A.doInitialization();
>>    B.doInitialization();
>>    B.runOnFunction();
>>    B.doInitialization();
>>    C.doInitialization();
>>    C.runOnFunction();
>>    C.doInitialization();
>>
>> Thanks,
>
> You can run opt three times (one for each pass A, B, and C), piping  
> them together so that the output of one is the input to the next.
>
> -- John T.
>
>> Kecheng
>>
>>
>>
>> _______________________________________________
>> LLVM Developers mailing list
>> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
>> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
>
>