use _Py_IS_ALIGNED()

Author: tom-pytel

Include/cpython/pyatomic.h

@@ -551,8 +551,8 @@ static inline void *
 _Py_atomic_memcpy_ptr_store_relaxed(void *dest, void *src, Py_ssize_t n)
 {
     size_t size = (size_t)n;
-    assert(((uintptr_t)dest & (sizeof (void *) - 1)) == 0);
-    assert(((uintptr_t)src & (sizeof (void *) - 1)) == 0);
+    assert(_Py_IS_ALIGNED(dest, sizeof(void *)));
+    assert(_Py_IS_ALIGNED(src, sizeof(void *)));
     assert(size % sizeof(void *) == 0);
 
     if (dest != src) {
@@ -572,8 +572,8 @@ static inline void *
 _Py_atomic_memmove_ptr_store_relaxed(void *dest, void *src, Py_ssize_t n)
 {
     size_t size = (size_t)n;
-    assert(((uintptr_t)dest & (sizeof (void *) - 1)) == 0);
-    assert(((uintptr_t)src & (sizeof (void *) - 1)) == 0);
+    assert(_Py_IS_ALIGNED(dest, sizeof(void *)));
+    assert(_Py_IS_ALIGNED(src, sizeof(void *)));
     assert(size % sizeof(void *) == 0);
 
     if (dest < src || dest >= (void *)((char *)src + size)) {

Include/internal/pycore_list.h

@@ -59,7 +59,7 @@ _Py_memory_ptrs_repeat(char* dest, Py_ssize_t len_dest, Py_ssize_t len_src)
 {
     assert(len_src > 0);
     assert(len_src % sizeof(void *) == 0);
-    assert(((uintptr_t)dest & (sizeof (void *) - 1)) == 0);
+    assert(_Py_IS_ALIGNED(dest, sizeof(void *)));
     Py_ssize_t copied = len_src;
     while (copied < len_dest) {
         Py_ssize_t bytes_to_copy = Py_MIN(copied, len_dest - copied);