Before the fix the build of docs-llvm-html would fail.
The rG8bc03d216824 introduced a reference to an undefined label,
so we have warning as:
llvm-project/llvm/docs/GlobalISel/GenericOpcode.rst:295:\
undefined label: i_intr_llvm_ptrmask (if the link has no\
caption the label must precede a section header)
Zero out an arbitrary mask of bits of a pointer. The mask type must be
an integer, and the number of vector elements must match for all
-operands. This corresponds to :ref:`i_intr_llvm_ptrmask`.
+operands. This corresponds to `i_intr_llvm_ptrmask`.
.. code-block:: none