[clang] [CLANG][AArch64] Add the modal 8 bit floating-point scalar type (PR #97277)

[Paul Walker via cfe-commits]

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@@ -1391,7 +1391,8 @@ void ASTContext::InitBuiltinTypes(const TargetInfo &Target,
   }
 
   if (Target.hasAArch64SVETypes() ||
-      (AuxTarget && AuxTarget->hasAArch64SVETypes())) {
+      (AuxTarget && AuxTarget->hasAArch64SVETypes()) ||
+      Target.hasArmMFloat8Type()) {
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paulwalker-arm wrote:

This might be a bum steer but I'm wondering if `Target.hasArmMFloat8Type()` is needed here.  If you ignore the name I think `hasAArch64SVETypes()` effectively means "are_the_types_defined_in_AArch64SVEACLETypes.def_available?".

If you agree that the new types should not be hidden behind a feature flag then perhaps the original code just works without alteration.

https://github.com/llvm/llvm-project/pull/97277