[llvm] [AArch64] Expand llvm.histogram intrinsic to support umax, umin, and uadd.sat operations (PR #138447)

[Graham Hunter via llvm-commits]

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@@ -2932,9 +2932,8 @@ the behavior is undefined, unless one of the following exceptions applies:
   must be a null pointer, otherwise the behavior is undefined.
 
 * ``dereferenceable(<n>)`` operand bundles only guarantee the pointer is
-    dereferenceable at the point of the assumption. The pointer may not be
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huntergr-arm wrote:

nit: unrelated change?

https://github.com/llvm/llvm-project/pull/138447