[llvm] [PowerPC] Add phony subregisters to cover the high half of the VSX registers. (PR #94628)

[Matt Arsenault via llvm-commits]

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@@ -155,6 +156,22 @@ foreach Index = 0-31 in {
                 DwarfRegNum<[!add(Index, 32), !add(Index, 32)]>;
 }
 
+// The FH and VFH registers have been marked as Artifical becauase there are no
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arsenm wrote:

Typo becauase

https://github.com/llvm/llvm-project/pull/94628