To ensure all uses of a given register observe the same value (even if
'``undef``'), the :ref:`freeze instruction <i_freeze>` can be used.
A value is frozen if its uses see the same value.
+An aggregate value or vector is frozen if its elements are frozen.
+The padding of an aggregate isn't considered, since it isn't visible
+without storing it into memory and loading it with a different type.
.. code-block:: llvm
While ``undef`` and ``poison`` pointers can be frozen, the result is a
non-dereferenceable pointer. See the
:ref:`Pointer Aliasing Rules <pointeraliasing>` section for more information.
+If an aggregate value or vector is frozen, the operand is frozen element-wise.
+The padding of an aggregate isn't considered, since it isn't visible
+without storing it into memory and loading it with a different type.
Example: