[artiq] symbol_resolver: Cast ndarray.{shape,strides} globals to usize*

This is needed as ndarray.{shapes,strides} are ArrayValues, and so a GEP
operation is required to convert them into pointers to their first
elements.

nac3artiq/src/symbol_resolver.rs

@@ -1248,9 +1248,30 @@ impl InnerResolver {
 
             let ndarray_ndims = llvm_usize.const_int(ndims, false);
 
+            // calling as_pointer_value on shape and strides returns [i64 x ndims]*
+            // convert into i64* to conform with expected layout of ndarray
+
             let ndarray_shape = shape_global.as_pointer_value();
+            let ndarray_shape = unsafe {
+                ctx.builder
+                    .build_in_bounds_gep(
+                        ndarray_shape,
+                        &[llvm_usize.const_zero(), llvm_usize.const_zero()],
+                        "",
+                    )
+                    .unwrap()
+            };
 
             let ndarray_strides = strides_global.as_pointer_value();
+            let ndarray_strides = unsafe {
+                ctx.builder
+                    .build_in_bounds_gep(
+                        ndarray_strides,
+                        &[llvm_usize.const_zero(), llvm_usize.const_zero()],
+                        "",
+                    )
+                    .unwrap()
+            };
 
             let ndarray = llvm_ndarray
                 .as_base_type()