[clang] [llvm] Introduce the Armv9.6-A architecture version (PR #110825)

[Jack Styles via cfe-commits]

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@@ -706,6 +706,11 @@ def HasV9_5aOps   : SubtargetFeature<"v9.5a", "HasV9_5aOps", "true",
                                    "Support ARM v9.5a instructions",
                                    [HasV9_4aOps]>;
 
+// Armv9.6-A is a v9-only architecture.
+def HasV9_6aOps   : SubtargetFeature<"v9.6a", "HasV9_6aOps", "true",
+                                   "Support ARM v9.6a instructions",
+                                   [HasV9_5aOps]>;
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Stylie777 wrote:

I can see this is something we traditionally do not do for ARM so resolving thread.

https://github.com/llvm/llvm-project/pull/110825