llvm dev - May 2010 - [LLVMdev] [Fwd: Error while running my pass with opt]

Hi,

you need something like this in your pass:

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

because you need to specify which analysis you are using.

Tobi

But this is already present in my pass.
And I am not able to understand the cause for the error:

opt: /home/ambika/llvm_3/llvm-2.6/include/llvm/PassAnalysisSupport.h:203: 
AnalysisType& llvm::Pass::getAnalysisID(const llvm::PassInfo*) const 
[with AnalysisType = llvm::DominatorTree]: Assertion `ResultPass && 
"getAnalysis*() called on an analysis that was not "
"'required' by
pass!"' failed.

What can possibly cause this. Any ideas will also help.

Tobias Grosser wrote:
> Hi,
>
> you need something like this in your pass:
>
> void YourPass::getAnalysisUsage(AnalysisUsage &AU) const {
>   AU.addRequired<DominatorTree>();
> }
>
> because you need to specify which analysis you are using.
>
> Tobi

Try setting breakpoint in your getAnalysisUsage() and see if it's
actually called. Maybe there's a subtle difference in signature.
Failing that, try breaking on assertion failure and examining it more closely.

On Sat, May 8, 2010 at 7:03 PM, ambika <ambika at cse.iitb.ac.in>
wrote:
> But this is already present in my pass.
> And I am not able to understand the cause for the error:
>
> opt: /home/ambika/llvm_3/llvm-2.6/include/llvm/PassAnalysisSupport.h:203:
> AnalysisType& llvm::Pass::getAnalysisID(const llvm::PassInfo*) const
> [with AnalysisType = llvm::DominatorTree]: Assertion `ResultPass &&
> "getAnalysis*() called on an analysis that was not "
"'required' by
> pass!"' failed.
>
> What can possibly cause this. Any ideas will also help.
>
> Tobias Grosser wrote:
>> Hi,
>>
>> you need something like this in your pass:
>>
>> void YourPass::getAnalysisUsage(AnalysisUsage &AU) const {
>>   AU.addRequired<DominatorTree>();
>> }
>>
>> because you need to specify which analysis you are using.
>>
>> Tobi
>
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ambika wrote:
> But this is already present in my pass.
> And I am not able to understand the cause for the error:
>   
Can you send a copy of your getAnalysisUsage() method for your pass?  
There are some funny errors that can occur when you do things that the 
PassManager cannot handle.

For example, if you're requiring a transform pass, that can cause 
strange assertions from the PassManager.  Requiring a BasicBlock pass 
from a FunctionPass might also hit assertions within PassManager (I think).

If you post your getAnalysisUsage() method, I can take a quick look to 
see if you're doing something that I know is unsupported by PassManager.

-- John T.
> opt: /home/ambika/llvm_3/llvm-2.6/include/llvm/PassAnalysisSupport.h:203: 
> AnalysisType& llvm::Pass::getAnalysisID(const llvm::PassInfo*) const 
> [with AnalysisType = llvm::DominatorTree]: Assertion `ResultPass &&
> "getAnalysis*() called on an analysis that was not "
"'required' by
> pass!"' failed.
>
> What can possibly cause this. Any ideas will also help.
>
> Tobias Grosser wrote:
>   
>> Hi,
>>
>> you need something like this in your pass:
>>
>> void YourPass::getAnalysisUsage(AnalysisUsage &AU) const {
>>   AU.addRequired<DominatorTree>();
>> }
>>
>> because you need to specify which analysis you are using.
>>
>> Tobi
>>     
>
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> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
>