llvm dev - Oct 2013 - [LLVMdev] get the value of a Constant in LLVM IR

Hello,
i parse the llvm IR (llvm-3.3 version) and when i meet a constant, i want
to get it's value.
eg i32 5,   i want to get the 5.
I am interested in ConstantInt-ConstantFP-ConstantArray-ConstantStruct
subclasses.
Things are a bit easier with ConstantInt and ConstantFP constants but how
could i get the value of a ConstantArray?
The
http://llvm.org/docs/ProgrammersManual.html#the-constant-class-and-subclasses
says:
ConstantArray : This represents a constant array.
const std::vector<Use> &getValues() const: Returns a vector of
component
constants that makeup this array.
But i cannot find this method, i think that it is not implemented in the
3.3 version.
There is the method 'Value::print()' but this gives me also the type
which
is not what i want.
I found also the 'static void WriteConstantInternal()' method in
llvm/lib/IR/AsmWriter.cpp which is called
by 'Value::print()' but it is 'static' so i cannot access it.  I
need
something like the 'WriteConstantInternal' method.
Any ideas?

Thanks

Eirini
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On 10/17/13 8:42 AM, Eirini Psallida wrote:
> Hello,
> i parse the llvm IR (llvm-3.3 version) and when i meet a constant, i 
> want to get it's value.
> eg i32 5,   i want to get the 5.
> I am interested in ConstantInt-ConstantFP-ConstantArray-ConstantStruct 
> subclasses.
> Things are a bit easier with ConstantInt and ConstantFP constants but how
> could i get the value of a ConstantArray?
> The 
>
http://llvm.org/docs/ProgrammersManual.html#the-constant-class-and-subclasses
>
> says:
> ConstantArray : This represents a constant array.
ConstantArray is a subclass of Constant.  Constant, in turn, has a 
method called getAggregateElement() that will return the Constant * 
value at the specified offset within the aggregate constant (be it an 
array, vector, etc.).

For more information, consult the Constant class doxygen page:

http://llvm.org/doxygen/classllvm_1_1Constant.html

-- John T.

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