[llvm] [ISel] Introduce llvm.clmul intrinsic (PR #168731)

[Ramkumar Ramachandra via llvm-commits]

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@@ -18332,8 +18332,6 @@ then the result is the size in bits of the type of ``src`` if
 ``is_zero_poison == 0`` and ``poison`` otherwise. For example,
 ``llvm.cttz(2) = 1``.
 
-.. _int_overflow:
-
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artagnon wrote:

No, it's intentional: while adding intrinsics, this section marker got inadvertently moved.

https://github.com/llvm/llvm-project/pull/168731