llvm - get users of an instruction

Question

I am trying to get the users of alloca instruction (to basically get the users of a variable). I am using the following code to do so:

virtual bool runOnModule(Module &M)
{
        for(Module::iterator F= M.begin(), E = M.end(); F != E; ++F) // iterating over functions in a module
        {
            for (Function::iterator FI = F->begin(), E = F->end(); FI != E; ++FI)    // iterating over BB in a function
            {
                for (BasicBlock::iterator I = FI->begin(), E = FI->end(); I != E; ++I) // iterating over instructions in the BB
                {
                    Value* v = cast<Value>(I);
                    v->user_begin ();
                }
            }
        }
        return false;
    }

However, it's giving me the error:

error: ‘class llvm::Value’ has no member named ‘user_begin’

Can anyone tell me why this is happening and suggest a possible solution to what I'm trying to do here (get users of a variable)?

Could it be that you use an old version of LLVM that does not have this API? — AlexDenisov, Apr 24 '18 at 08:07

score 0 · Answer 1 · edited Aug 27 '20 at 06:23

0

I think you can directly use user_begin without casting Instruction to Value. Just like:

I->user_begin()

edited Aug 27 '20 at 06:23

David Buck

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answered Aug 27 '20 at 01:59

10ca1h0st

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llvm - get users of an instruction

1 Answers1