llvm dev - Oct 2017 - About LLVM Pass dependency

Hello
  I am working on pass which has dependency on multiple passes.  Say
D1,D2,D3
I used
INITIALIZE_PASS_BEGIN
INITIALIZE_PASS_DEPENDENCY(D1)
INITIALIZE_PASS_DEPENDENCY(D2)
INITIALIZE_PASS_DEPENDENCY(D3)
INITIALIZE_PASS_END.

While running it through opt tool it, I had to specify this D1,D2,D3 pass
names
to get this pass executed before my pass.
Is there way, to let llvm pass manager to know  execute all dependencies
without
having to specify explicitly.?

I suspect i am doing something wrong in my code, May be.

Thanks
Mahesh
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Hi Mahesh,

Did you override getAnalysisUsage and require D1, D2 and D3?


void YourPass::getAnalysisUsage(AnalysisUsage &AU) const {
  AU.addRequired<D1>();
  AU.addRequired<D2>();
  AU.addRequired<D3>();
}

On Tue, Oct 3, 2017 at 2:00 AM, Mahesh Attarde via llvm-dev <
llvm-dev at lists.llvm.org> wrote:
> Hello
>   I am working on pass which has dependency on multiple passes.  Say
> D1,D2,D3
> I used
> INITIALIZE_PASS_BEGIN
> INITIALIZE_PASS_DEPENDENCY(D1)
> INITIALIZE_PASS_DEPENDENCY(D2)
> INITIALIZE_PASS_DEPENDENCY(D3)
> INITIALIZE_PASS_END.
>
> While running it through opt tool it, I had to specify this D1,D2,D3 pass
> names
> to get this pass executed before my pass.
> Is there way, to let llvm pass manager to know  execute all dependencies
> without
> having to specify explicitly.?
>
> I suspect i am doing something wrong in my code, May be.
>
> Thanks
> Mahesh
>
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>
>
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Hi Hongbin

I am not quite familiar with AnalysisUsage, let me correct question a bit.
I have read Writing Pass
<http://llvm.org/docs/WritingAnLLVMPass.html#specifying-interactions-between-passes>,
All examples that i see here are based on collecting information .i.e
Analysis Passes.
I wonder if this applies to Transformation passes also.
e.g.

void MyInliner::getAnalysisUsage(AnalysisUsage &AU) const {
   AU.addRequired<SimplifyCFGPass>();    // Transformation Pass
   AU.addRequired<AnnotatedFunctionPass>();  // Transformation like pass
   AU.addRequired<CallGraphSCCPass>();    // Analysis Pass
}

here AnnotateFunctionPass is adding meta information,so technically nothing
Functional transformational in module and
not Analysis either.
Would that be right way?

Thanks
Mahesh

On Tue, Oct 3, 2017 at 9:43 PM, Hongbin Zheng <etherzhhb at gmail.com>
wrote:
> Hi Mahesh,
>
> Did you override getAnalysisUsage and require D1, D2 and D3?
>
>
> void YourPass::getAnalysisUsage(AnalysisUsage &AU) const {
>   AU.addRequired<D1>();
>   AU.addRequired<D2>();
>   AU.addRequired<D3>();
> }
>
> On Tue, Oct 3, 2017 at 2:00 AM, Mahesh Attarde via llvm-dev <
> llvm-dev at lists.llvm.org> wrote:
>
>> Hello
>>   I am working on pass which has dependency on multiple passes.  Say
>> D1,D2,D3
>> I used
>> INITIALIZE_PASS_BEGIN
>> INITIALIZE_PASS_DEPENDENCY(D1)
>> INITIALIZE_PASS_DEPENDENCY(D2)
>> INITIALIZE_PASS_DEPENDENCY(D3)
>> INITIALIZE_PASS_END.
>>
>> While running it through opt tool it, I had to specify this D1,D2,D3
pass
>> names
>> to get this pass executed before my pass.
>> Is there way, to let llvm pass manager to know  execute all
dependencies
>> without
>> having to specify explicitly.?
>>
>> I suspect i am doing something wrong in my code, May be.
>>
>> Thanks
>> Mahesh
>>
>> _______________________________________________
>> LLVM Developers mailing list
>> llvm-dev at lists.llvm.org
>> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>>
>>
>
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