[clang] [AArch64] Add option -msve-streaming-vector-bits= . (PR #144611)

[Sander de Smalen via cfe-commits]

================
@@ -2261,6 +2261,23 @@ void Sema::checkTypeSupport(QualType Ty, SourceLocation Loc, ValueDecl *D) {
         }
       }
     }
+
+    if (auto *VT = Ty->getAs<VectorType>();
+        VT && FD &&
+        (VT->getVectorKind() == VectorKind::SveFixedLengthData ||
+         VT->getVectorKind() == VectorKind::SveFixedLengthPredicate) &&
+        (LangOpts.VScaleMin != LangOpts.VScaleStreamingMin ||
+         LangOpts.VScaleMax != LangOpts.VScaleStreamingMax)) {
+      if (IsArmStreamingFunction(FD, /*IncludeLocallyStreaming=*/true)) {
+        Diag(Loc, diag::err_sve_fixed_vector_in_streaming_function) << Ty << 0;
----------------
sdesmalen-arm wrote:

nit:
```suggestion
        Diag(Loc, diag::err_sve_fixed_vector_in_streaming_function) << Ty << /*Streaming*/ 0;
```

https://github.com/llvm/llvm-project/pull/144611