[llvm] Cpu features cross platform (PR #205447)

[Lang Hames via llvm-commits]

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@@ -15,8 +17,9 @@
 #include <type_traits>
 namespace orc_rt {
 /// A simplification of what is in llvm/ADT/StringExtras.h
-/// Preserves the behaviour but removes tag dispatch
-/// Will assert if iterator is not a forward iterator.
+/// Preserving behaviour so we can switch if we ever pull
+/// a common util out of llvm. It removes the tag dispatch
+/// for simplicity sake. Added an assert to bail instead.
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lhames wrote:

Mind breaking it out? No need for a review on that PR -- you can just merge.

https://github.com/llvm/llvm-project/pull/205447