Use pointer::add instead of pointer::offset with a cast.

crates/api/src/trampoline/func.rs

@@ -58,7 +58,7 @@ unsafe extern "C" fn stub_fn(vmctx: *mut VMContext, call_id: u32, values_vec: *m
         Ok(()) => {
             for i in 0..returns_len {
                 // TODO check signature.returns[i].value_type ?
-                returns[i].write_value_to(values_vec.offset(i as isize));
+                returns[i].write_value_to(values_vec.add(i));
             }
             0
         }

crates/api/src/wasm.rs

@@ -460,13 +460,13 @@ pub unsafe extern "C" fn wasm_func_call(
     let func = (*func).func.borrow();
     let mut params = Vec::with_capacity(func.param_arity());
     for i in 0..func.param_arity() {
-        let val = &(*args.offset(i as isize));
+        let val = &(*args.add(i));
         params.push(val.val());
     }
     match func.call(&params) {
         Ok(out) => {
             for i in 0..func.result_arity() {
-                let val = &mut (*results.offset(i as isize));
+                let val = &mut (*results.add(i));
                 *val = wasm_val_t::from_val(&out[i]);
             }
             ptr::null_mut()
@@ -666,7 +666,7 @@ pub unsafe extern "C" fn wasm_instance_new(
     let store = &(*store).store;
     let mut externs: Vec<Extern> = Vec::with_capacity((*module).imports.len());
     for i in 0..(*module).imports.len() {
-        let import = *imports.offset(i as isize);
+        let import = *imports.add(i);
         externs.push((*import).ext.clone());
     }
     let module = &(*module).module;

crates/misc/py/src/import.rs

@@ -71,12 +71,7 @@ unsafe extern "C" fn stub_fn(vmctx: *mut VMContext, call_id: u32, values_vec: *m
             }
             result.clone_ref(py)
         };
-        write_value_to(
-            py,
-            values_vec.offset(i as isize),
-            signature.returns[i].value_type,
-            val,
-        );
+        write_value_to(py, values_vec.add(i), signature.returns[i].value_type, val);
     }
 }