Accessing global variables and using them in functions

[stebos100]

Hi all,

I was wondering if someone has run into a similar complication, when using constant variable lookups in a function in Enzyme, I get the error of "Enzyme: cannot compute with global variable that doesn't have marked shadow global @d_vars = external addrspace(4) global ptr, align 8.

The issue is associated with a function I am trying to differentiate w.r.t an input variable, and in this function we do a global lookup from this constant variable.

i.e

__constant__ double* d_var; 
//this is set somewhere in the code. 

double func(...) {

//some calculation steps
double var = d_vars[x]; 

//some more calculations... 

return var*other_var; 
}```

and then define and call the __enzyme_autodiffFunc();