[Question][Hw5] eval x

[ee12ha0220]

In the semantics, eval_x^#(m^#) = m^#(x).

I thought that x was things like %a in the llvm IR, and we can find it by using is_argument in utils.ml.
But I found out that is_argument could not find llvalues in the shape of %a.

So I want to ask

1. How does x looks like in llvm IR?
2. What values will make 'is_argument' true?

[RiceBiscuits]

1. please see this document (https://github.com/prosyslab-classroom/llvm-primer/blob/master/data-structure.md)

2. I don't know what you are actually doing, but please refer to the definition of the type argument.

This class represents an incoming formal argument to a Function.

A formal argument, since it is `‘formal’', does not contain an actual value but instead represents the type, argument number, and attributes of an argument for a specific function. When used in the body of said function, the argument of course represents the value of the actual argument that the function was called with.
(ref: https://llvm.org/doxygen/classllvm_1_1Argument.html)

[ee12ha0220]

So in implementing eval e mem, I want to know if e is x(in evalx#(m#) = m#(x)) or not. I thought using is_argument will verify this, but it doesn't. So how should I do this?

[RiceBiscuits]

Please read the document I mentioned in the previous comment.

[ee12ha0220]

I still can't quite get it, but I will read the materials again. Thank you for your time!