On Fri, 29 Oct 2021 11:53:16 -0700
Kalesh Singh [off-list ref] wrote:

quoted

If these functions are only called when val2 is constant, can't we make it
such that we get val2 from the hist_field directly? That is:

        u64 val2 = operand2->constant;  

operand2 might be a var ref to a constant, so we would need to resolve
that with hist_field_var_ref().

So can a var_ref change? If not, then we should convert that to a constant
for this operation.

-- Steve