[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;
+      } else if (const auto *FTy = FD->getType()->getAs<FunctionProtoType>()) {
+        if (FTy->getAArch64SMEAttributes() &
+            FunctionType::SME_PStateSMCompatibleMask) {
+          Diag(Loc, diag::err_sve_fixed_vector_in_streaming_function)
+              << Ty << 1;
----------------
sdesmalen-arm wrote:

nit: 
```suggestion
              << Ty << /*StreamingCompatible*/ 1;
```

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