[LLVMdev] How to Obtain a DataLayout Reference Given a Function & F

[John Criswell]

On 6/22/15 2:29 PM, Peter Finn wrote:
> I’ve been debugging SAFECode source code files, and line 170 in 
> ArrayBoundCheckLocal.cpp has been causing the following compilation 
> error:
>
> In file included from 
> /Users/peterfinn/Desktop/llvm_trunk_2/projects/safecode/lib/ArrayBoundChecks/ArrayBoundCheckLocal.cpp:18:
> In file included from 
> /Users/peterfinn/Desktop/build/projects/safecode/../../../llvm_trunk_2/projects/safecode/include/safecode/ArrayBoundsCheck.h:17:
> In file included from 
> /Users/peterfinn/Desktop/build/projects/safecode/../../../llvm_trunk_2/projects/safecode/include/safecode/AllocatorInfo.h:21:
> In file included from 
> /Users/peterfinn/Desktop/llvm_trunk_2/include/llvm/IR/Module.h:20:
> In file included from 
> /Users/peterfinn/Desktop/llvm_trunk_2/include/llvm/IR/DataLayout.h:27:
> In file included from 
> /Users/peterfinn/Desktop/llvm_trunk_2/include/llvm/Pass.h:378:
> */Users/peterfinn/Desktop/llvm_trunk_2/include/llvm/PassAnalysisSupport.h:201:53: 
> **error: **no member named 'ID' in 'llvm::DataLayout'*
>   return getAnalysisID<AnalysisType>(&AnalysisType::ID);
> *                      ~~~~~~~~~~~~~~^*
> */Users/peterfinn/Desktop/llvm_trunk_2/projects/safecode/lib/ArrayBoundChecks/ArrayBoundCheckLocal.cpp:170:9: 
> note: *in instantiation of function template specialization
> 'llvm::Pass::getAnalysis<llvm::DataLayout>' requested here
>   TD = &getAnalysis<DataLayout>();
> *        ^*
> 1 error generated.
> make[2]: *** 
> [/Users/peterfinn/Desktop/build/projects/safecode/lib/ArrayBoundChecks/Debug+Asserts/ArrayBoundCheckLocal.o] 
> Error 1
> make[1]: *** [ArrayBoundChecks/.makeall] Error 2
> make: *** [all] Error 1
>
> I assume I need to obtain a DataLayout reference from the argument of 
> the function “runOnFunction”.  Is this correct?  If so, how do I do 
> this?  If not, what is supposed to be done instead?

If you have a pointer to a Function object, you can get the Module in 
which the Function resides by calling the getParent() method of 
Function.  If F is a pointer to an llvm::Function, then

F->getParent()

... should return a pointer (or reference; I'm not sure which) to the 
Function's containing module.

Once you have the Module, you can get the DataLayout.

Regards,

John Criswell

>
> Thanks,
> Peter Finn
>
>
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-- 
John Criswell
Assistant Professor
Department of Computer Science, University of Rochester
http://www.cs.rochester.edu/u/criswell

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