[llvm] [InstCombine] Don't folder select to or if value argument is user of invalid addrspacecast inst (PR #144686)

[Wenju He via llvm-commits]

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@@ -12621,6 +12621,9 @@ have no side effects, and must not capture the value of the pointer.
 If the source is :ref:`poison <poisonvalues>`, the result is
 :ref:`poison <poisonvalues>`.
 
+If the source is not :ref:`poison <poisonvalues>`, and the result pointer is
+non-dereferenceable, the result is :ref:`poison <poisonvalues>`.
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wenju-he wrote:

done in 3128b338492a977b35b7c39bc770e85a703ca8d0, thanks @nikic 

https://github.com/llvm/llvm-project/pull/144686